Patent Publication Number: US-2019196450-A1

Title: Cutting system

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application claims the benefit of priority to Japanese Patent Application No. 2017-250641 filed on Dec. 27, 2017. The entire contents of this application are hereby incorporated herein by reference. 
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a cutting system including a cutting machine that produces a crown-shaped crown prosthesis. 
     2. Description of the Related Art 
     Conventionally, cutting machines that process a workpiece, such as a dental ceramic material, a dental resin material, or the like, into a desired shape to produce a crown prosthesis (which will be also referred to as an artificial tooth, an artificial crown, or the like) have been known. A cutting machine includes a processing tool and a crown prosthesis is produced by performing cutting, polishing, or the like on a workpiece by the processing tool. 
     As a cutting machine of this type, a cutting machine including an auto tool changer (ATC) that is able to automatically replace a plurality of processing tools which include cutters having different shapes in order to automatically and continuously perform various kinds of processing by one operation is disclosed, for example, in Japanese Laid-open Patent Publication No. 2017-094437. 
     Incidentally, in recent years, development of cutting machines which include a function of automatically replacing a workpiece that is a processing target and continuously producing crown prostheses has been advanced. In such a cutting machine, using a plurality of processing tools and a plurality of workpieces, a plurality of crown prostheses is continuously produced. For example, an operator sends job data of a plurality of crown protheses that the operator desires to produce to the cutting machine as needed, and thereby, continuously operates the cutting machine. Using the known cutting machine, however, the operator is not able to confirm how much an operation has progressed with respect to the plurality of job data that have been sent to the cutting machine. 
     SUMMARY OF THE INVENTION 
     In view of the above-described points, preferred embodiments of the present invention provide cutting systems in each of which an operator is able to more accurately confirm an operation status of a cutting machine. 
     A cutting system according to a preferred embodiment of the present invention includes a cutting machine including a plurality of processing tools that process a workpiece to produce a crown prosthesis and a tool magazine that accommodates the plurality of processing tools, a display that displays an operation status of the cutting machine, and a controller that transmits job data of the crown prosthesis to the cutting machine, the controller includes a first counter that counts an operating time of the cutting machine in a predetermined unit and a display controller that puts the counted operating time into a first graph and displays the first graph on the display, and the display controller displays, if the operating time is less than a predetermined time, the first graph in a first color on the display and displays, if the operating time is the predetermined time or more, the first graph in a second color that is different from the first color on the display. 
     In a cutting system according to a preferred embodiment of the present invention, the display displays the operation status of the cutting machine. Herein, the display controller puts the counted operating time into a first graph (for example, a doughnut graph) and displays the first graph on the display. Therefore, an operator can easily confirm the operating time of the cutting machine in a predetermined unit (for example, on a daily basis, a weekly basis, a monthly basis, or a yearly basis) by checking the first graph. Furthermore, when the first graph is displayed in the first color (for example, red), the operator can easily confirm that the operating time of the cutting machine is less than the predetermined time. Also, when the first graph is displayed in the second color (for example, blue), the operator can easily confirm that the operating time of the cutting machine is the predetermined time or more. As described above, the operator can more accurately confirm the operation status of the cutting machine by a simple method of checking the first graph that is displayed on the display. 
     According to preferred embodiments of the present invention, cutting systems allow operators to more accurately confirm an operation status of a cutting machine. 
     The above and other elements, features, steps, characteristics and advantages of the present invention will become more apparent from the following detailed description of the preferred embodiments with reference to the attached drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a schematic diagram illustrating a configuration example of a cutting system according to a preferred embodiment of the present invention. 
         FIG. 2  is a perspective view of a cutting machine according to a preferred embodiment of the present invention. 
         FIG. 3  is a plan view of a workpiece to which an adaptor is attached according to a preferred embodiment of the present invention. 
         FIG. 4  is a perspective view of a cutting machine according to a preferred embodiment of the present invention, illustrating a state in which a door of a conveying device is open. 
         FIG. 5  is a plan view of a conveyor according to a preferred embodiment of the present invention, illustrating a state in which a workpiece is gripped by the conveyor. 
         FIG. 6  is a front view of a cutting machine according to a preferred embodiment of the present invention. 
         FIG. 7  is a perspective view of a tool magazine according to a preferred embodiment of the present invention. 
         FIG. 8  is a perspective view of a rotation supporting member and a clamp according to a preferred embodiment of the present invention. 
         FIG. 9  is a block diagram of an operation terminal according to a preferred embodiment of the present invention. 
         FIG. 10  is a view illustrating an example of a confirmation screen that is displayed on a display according to a preferred embodiment of the present invention and a state in which an operation status of a cutting machine is displayed on a weekly basis. 
         FIG. 11  is a view illustrating an example of the confirmation screen that is displayed on the display according to a preferred embodiment of the present invention and a state in which operation statuses of four cutting machines are listed and displayed. 
         FIG. 12  is a view illustrating an example of the confirmation screen that is displayed on the display according to a preferred embodiment of the present invention and a state in which a use time of a cutting tool and a ratio of the use time are displayed. 
         FIG. 13  is a view illustrating an example of the confirmation screen that is displayed on the display according to a preferred embodiment of the present invention and a state in which a screen via which various settings are performed is displayed. 
         FIG. 14  is a view illustrating an example of the confirmation screen that is displayed on the display according to a preferred embodiment of the present invention and a state in which a calendar is displayed. 
         FIG. 15  is a view illustrating an example of the confirmation screen that is displayed on the display according to a preferred embodiment of the present invention and a state in which a calendar is displayed. 
         FIG. 16  is a view illustrating an example of the confirmation screen that is displayed on the display according to a preferred embodiment of the present invention and a state in which an operation status of a cutting machine is displayed on a monthly basis. 
         FIG. 17  is a view illustrating an example of the confirmation screen that is displayed on the display according to a preferred embodiment of the present invention and a state in which a calendar is displayed. 
         FIG. 18  is a view illustrating an example of the confirmation screen that is displayed on the display according to a preferred embodiment of the present invention and a state in which an operation status of a cutting machine is displayed on a daily basis. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Cutting systems according to preferred embodiments of the present invention will be described below with reference to the accompanying drawings. Note that, as a matter of course, the preferred embodiments described herein are not intended to be particularly limiting the present invention. Also, members and portions that have the same function are denoted by the same reference character and redundant description will be omitted or simplified, as appropriate. 
     As illustrated in  FIG. 1 , a cutting system  10  (which will be hereinafter referred to as a “system  10 ” as appropriate) includes cutting machines  20 A to  20 D, operation terminals  50 A to  50 D, a server  12 , and a router  14 . 
     Each of the cutting machines  20 A to  20 D and a corresponding one of the operation terminals  50 A to  50 D preferably are coupled to one another via a line L such that a wired communication therebetween is possible, for example. Note that each of the cutting machines  20 A to  20 D and a corresponding one of the operation terminals  50 A to  50 D are also able to wirelessly communicate with one another. The operation terminals  50 A to  50 D and the server  12  are coupled with one another so as to be able to mutually communicate information by a wireless communication network provided via the router  14 . The server  12  is a host computer that serves as a trunk of each processing of the system  10 . The server  12  includes a large-capacity storage  16  that stores information. Note that, in this preferred embodiment, each of the number of the cutting machines  20 A to  20 D and the number of the operation terminals  50 A to  50 D is four, but may be any number of one to three and also may be five or more. 
     Detail configurations of the cutting machines  20 A to  20 D will be described below. Note that basic configurations of the cutting machines  20 A to  20 D are similar to one another, and therefore, a configuration of the cutting machine  20 A will be described and, for the cutting machines  20 B to  20 D, similar description to that of the cutting machine  20 A will be omitted.  FIG. 2  is a perspective view of the cutting machine  20 A. In the following description, when the cutting machine  20 A is viewed from front, a direction away from the cutting machine  20 A is forward, a direction approaching to the cutting machine  20 A is rearward. Left, right, up, and down mean left, right, up, down when the cutting machine  20 A is viewed from front, respectively. Also, symbols F, Rr, L, R, U, and D in the drawings mean front, rear, left, right, up, and down, respectively. In this preferred embodiment, when it is assumed that axes that are orthogonal to one another are an X axis, a Y axis, and a Z axis, the cutting machine  20 A is arranged on a plane surface formed by the X axis and the Y axis. In this case, the X axis is an axis that extends in a front-rear direction. The Y axis is an axis that extends in a left-right direction. The Z axis is an axis that extends in an up-down direction. Also, symbols ex, ey, and ez indicate rotational directions about the X axis, the Y axis, and the Z axis, respectively. However, the above described directions are merely directions that have been set for convenience of description, do not limit a setting mode of the cutting machine  20 A, and do not limit the present invention. 
     The cutting machine  20 A is a device in which a plurality of workpieces  5  (see  FIG. 3 ) is accommodated and which selects one workpiece  5  from the plurality of accommodated workpieces  5  and performs cutting on the selected workpiece  5 . For example, the cutting machine  20 A processes the workpiece  5  to produce a crown prosthesis. A shape of the workpiece  5  is, for example, a disk shape. The workpiece  5  is formed of various types of materials, such as zirconia, wax, a poly methyl methacrylate (PMMA) resin, a hybrid resin, a polyether ether ketone (PEEK) resin, plaster, or the like. When zirconia is used as a material of the workpiece  5 , for example, half-sintered zirconia is used. However, the shape and materials of the workpiece  5  are not particularly limited. 
     As illustrated in  FIG. 3 , in this preferred embodiment, an adaptor  8  is attached to the workpiece  5 . With the adaptor  8  attached to the workpiece  5 , the workpiece  5  is accommodated in the cutting machine  20 A and is processed. In this case, an insertion hole  8   a  is formed in a central portion of the adaptor  8 . The workpiece  5  is inserted in the insertion hole  8   a , and thus, the workpiece  5  is attached to the adaptor  8 . In the following description, the workpiece  5  is the workpiece  5  to which the adaptor  8  is attached. The workpiece  5  includes the adaptor  8  that is attached to the workpiece  5 , as well as the workpiece  5  itself. 
     As illustrated in  FIG. 2 , the cutting machine  20 A includes a processing device  30  and a conveying device  40 . As illustrated in  FIG. 4 , the plurality of workpieces  5  is accommodated in the conveying device  40 . The conveying device  40  is a device that selects one workpiece  5  from the plurality of workpieces  5  that are accommodated and conveys the selected workpiece  5  to the processing device  30 . The conveying device  40  preferably has a box shape, for example. In this case, the conveying device  40  includes a case body  41 , a door  42 , a stocker  43 , and a conveyor  44  (see  FIG. 5 ). 
     The case body  41  preferably has a box shape and has a space inside. The space inside the case body  41  is a space in which the stocker  43  in which the plurality of workpieces  5  is accommodated is accommodated. An opening  47  is located in a front portion of the case body  41 . 
     The door  42  is provided in the case body  41  so as to be freely openable and closable. The door  42  is supported by the case body  41  so as to be rotatable with a right end thereof as an axis. As illustrated in  FIG. 2 , in the door  42 , a supporting projection  42   a  that extends rightward from a right portion thereof is provided and the supporting projection  42   a  is supported by the case body  41 . In this case, the door  42  rotates about the supporting projection  42   a  as an axis to open and close the opening  47  of the case body  41 , as illustrated in  FIG. 4 . When the opening  47  is opened by the door  42 , the space inside the case body  41  is in a state in which the space communicates with outside. 
     The plurality of workpieces  5  is accommodated in the stocker  43 . In this preferred embodiment, the stocker  43  is provided in the door  42 . In this preferred embodiment, the stocker  43  includes a stocker body  43   a  and a plurality of housings  43   b . The stocker body  43   a  has a box shape that extends in the up-down direction and has a space inside. 
     As illustrated in  FIG. 4 , in each of the housings  43   b , a corresponding one of the workpieces  5  to which the adaptor  8  (see  FIG. 3 ) is attached is accommodated. The plurality of the housings  43   b  is arranged in the space inside the stocker body  43   a . The plurality of housings  43   b  is aligned in the up-down direction. In this case, each of the housings  43   b  has a space inside and the workpiece  5  to which the adaptor  8  is attached is accommodated in the inside space. For example, a shape of an inner circumference that defines the space of each of the housings  43   b  is a shape that corresponds to the adaptor  8 . For one housing  43   b , one workpiece  5  is accommodated therein. In this preferred embodiment, nine housings  43   b  are arranged and it is possible to accommodate nine workpieces  5  in the stocker  43 , for example. However, the number of the housings  43   b  is not particularly limited. Also, arrangement positions of the housings  43   b  are not particularly limited and, for example, some of the housings  43   b  may be arranged so as to be aligned in the left-right direction. 
     As illustrated in  FIG. 5 , the conveyor  44  takes out the workpiece  5  that is accommodated in the corresponding housing  43   b  of the stocker  43  from the stocker  43 . The conveyor  44  conveys the workpiece  5  that has been taken out to the processing device  30 . More specifically, the conveyor  44  attaches the workpiece  5  that has been taken out from the housing  43   b  of the stocker  43  to a clamp  36 , which will be described later. Also, the conveyor  44  detaches the workpiece  5  from the clamp  36  and conveys the workpiece  5  to the conveying device  40 . The conveyor  44  accommodates the workpiece  5  that has been detached in the housing  43   b  of the stocker  43 . The conveyor  44  is able to attach and detach the workpiece  5  to and from the corresponding housing  43   b  of the stocker  43 . The conveyor  44  is an example of a conveying mechanism. Although not illustrated, the conveyor  44  is arranged in the space inside the case body  41 . The conveyor  44  is controlled by a motor, which is not illustrated, and is movable in the case body  41  and a case body  31  of the processing device  30 , which will be described later. The conveyor  44  includes a conveyor main body  44   a , a first hook  44   b , a second hook  44   c , a first spring  44   d , and a second spring  44   e.    
     The conveyor main body  44   a  is a plate member. The first hook  44   b  and the second hook  44   c  are members that sandwich the adaptor  8  therebetween. The first hook  44   b  and the second hook  44   c  are arranged so as to oppose to one another in the front-rear direction. The first hook  44   b  is supported so as to be rotatable with a first shaft  44   g  provided in the conveyor main body  44   a  as an axis. A tip portion of the first hook  44   b  engages with a first engagement projection  8   b  of the adaptor  8 . The second hook  44   c  is supported so as to be rotatable with a second shaft  44   h  provided in the conveyor main body  44   a  as an axis. A tip portion of the second hook  44   c  engages with a second engagement projection  8   c  of the adaptor  8 . 
     The first spring  44   d  applies an elastic force to the first hook  44   b . The first spring  44   d  applies an elastic force in a direction in which the tip portion of the first hook  44   b  moves toward the second hook  44   c . The second spring  44   e  applies an elastic force to the second hook  44   c . The second spring  44   e  applies an elastic force in a direction in which the tip portion of the second hook  44   c  moves toward the first hook  44   b.    
     Next, the processing device  30  will be described. The processing device  30  processes the workpiece  5  that has been conveyed from the conveying device  40  to produce a crown prosthesis. For example, the processing device  30  preferably has a box shape and a portion of the processing device  30  communicates with the conveying device  40 . As illustrated in  FIG. 2 , the processing device  30  includes the case body  31  and a cover  32 . The case body  31  preferably has a box shape and has a space inside. A front portion of the case body  31  is opened. The cover  32  is supported by the case body  31  so as to freely open and close an opening of the case body  31 . 
     As illustrated in  FIG. 6 , the processing device  30  includes a spindle  33 , a tool magazine  34  (see also  FIG. 7 ), a rotation supporting member  35  (see also  FIG. 8 ), and the clamp  36  (see  FIG. 8 ). Note that, in  FIG. 6 , a state in which the cover  32  is open is illustrated. 
     The spindle  33  processes the workpiece  5  by causing a processing tool  6  to rotate. The spindle  33  includes a gripper  33   a  and a rotary  33   b . The gripper  33   a  grips an upper end portion of the processing tool  6 . Examples of the processing tool  6  include a tool that cuts the workpiece  5  and a tool that polishes the workpiece  5 . 
     The rotary  33   b  causes the processing tool  6  that is gripped by the gripper  33   a  to rotate. The rotary  33   b  extends in the up-down direction. In this case, a motor, which is not illustrated, is coupled to the rotary  33   b . The rotary  33   b  is rotatable about the Z axis ez due to driving of the motor. Accompanied with rotation of the rotary  33   b , the processing tool  6  that is gripped by the gripper  33   a  rotates about the Z axis θz. Also, the rotary  33   b  is configured so as to move in the left-right direction and the up-down direction by a first driving member (not illustrated). 
     As illustrated in  FIG. 7 , the tool magazine  34  is capable of accommodating the plurality of processing tools  6 . The tool magazine  34  preferably has a box shape. A plurality of holes  34   a  that accommodate the processing tools  6  is provided in an upper surface of the tool magazine  34 . Each of the processing tools  6  is inserted through a corresponding one of the holes  34   a  in a state in which an upper portion of the processing tool  6  is exposed. In replacing the processing tool  6  to another one, the processing tool  6  that is gripped by the gripper  33   a  is returned to the hole  34   a . Then, the spindle  33  is caused to move to a position above one of the processing tools  6  which is used next and the gripper  33   a  grips an upper end of the processing tool  6  that is located under the gripper  33   a.    
     As illustrated in  FIG. 6 , a rotary shaft  37  that rotatably supports the rotation supporting member  35  is provided in the tool magazine  34 . The rotary shaft  37  extends in the left-right direction and is connected to the rotation supporting member  35 . A second driving member (not illustrated) is provided in the tool magazine  34 . The rotary shaft  37  is configured to as to be rotatable about the Y axis θy by the second driving member. The rotary shaft  37  rotates about the Y axis θy, and thus, the rotation supporting member  35  rotates about the Y axis θy. 
     As illustrated in  FIG. 8 , the rotation supporting member  35  rotatably supports the clamp  36 . The rotation supporting member preferably has a substantial U-shape in planar view. The rotation supporting member  35  is connected to the rotary shaft  37  and includes a first portion  35   a  that extends in the front-rear direction, a second portion  35   b  that extends from a rear end of the first portion  35   a  leftward, and a third portion  35   c  that extends from a front end of the first portion  35   a  leftward. The clamp  36  is rotatably supported by the second portion  35   b  and the third portion  35   c . A motor  38  that causes the clamp  36  to rotate about the X axis θx is provided in the third portion  35   c.    
     The clamp  36  is a member that holds the adaptor  8 . The clamp  36  preferably has a substantial C-shape in planar view. The clamp  36  holds the adaptor  8  that has been conveyed by the conveyor of the conveying device  40 . In this preferred embodiment, processing is performed on the workpiece  5  that is held by the clamp  36 . 
     The cutting machine  20 A controls the first driving member, the second driving member, the spindle  33 , and the conveyor  44 , based on job data of a crown prosthesis, and produces the crown prosthesis. The cutting machine  20 A is capable of automatically replacing the processing tool  6  and automatically replacing the workpiece  5 . 
     Next, detailed configurations of the operation terminals  50 A to  50 D will be described. Note that basic configurations of the operation terminals  50 A to  50 D are similar to one another, and therefore, a configuration of the operation terminal  50 A will be described and, for operation terminals  50 B to  50 D, similar description to that of the operation terminal  50 A will be omitted. The operation terminal  50 A includes a computer mounted therein. As illustrated in  FIG. 9 , the operation terminal  50 A includes a storage  52  that stores information and a controller  54  that executes predetermined processing in accordance with a program. The controller  54  is coupled to the cutting machine  20 A. The controller  54  transmits the job data of the crown prosthesis to the cutting machine  20 A. Information (for example, the operating time of the cutting machine  20 A, the use time of the processing tool  6 , the processing time of the workpiece  5 , or the like) of an operation status of the cutting machine  20 A is transmitted from the cutting machine  20 A to the controller  54 . The information of the operation status of the cutting machine  20 A is transmitted to the server  12  and is stored in the storage  16 . The information of the operation status of the cutting machine  20 A is transmitted to the operation terminals  50 B to  50 D via the server  12 . The operation terminal  50 A includes a display  70  (see  FIG. 1 ) including a display or the like and input device (not illustrated) including a keyboard, a touch panel, a mouse, or the like. The display  70  is able to display operation statuses of the cutting machines  20 A to  20 D. 
     As illustrated in  FIG. 9 , the controller  54  is configured or programmed to include a display controller  55 , a first counter  56 , a second counter  60 , and a third counter  64 . The functions of these elements of the controller  54  may be implemented by a program. This program may be read from a recording medium such as a CD or a DVD. This program may be downloaded through the Internet. The functions of the elements of the controller  54  may be implemented by, for example, processor(s) and/or circuit(s). Specific control of each of the elements of the controller  54  described above will be described later. 
       FIG. 10  illustrates an example of a screen that is displayed on the display  70 . As illustrated in  FIG. 10 , in the system  10 , the operation status of each of the cutting machines  20 A to  20 D can be displayed on the display  70  of a corresponding one of the operation terminals  50 A to  50 D. The display  70  includes a screen  72 . A predetermined application is executed, and thus, an operation status confirmation screen  72 X (which will be hereinafter referred to as a confirmation screen  72 X) is displayed on the screen  72 . 
     As illustrated in  FIG. 10 , a section  73  in which a name of a cutting machine among the cutting machines  20 A to  20 D, which is displayed on the confirmation screen  72 X, is provided in an upper left side of an upper portion  72 A of the confirmation screen  72 X. In an example illustrated in  FIG. 10 , for example, the operation status of the cutting machine  20 A is displayed. Note that even the operation terminal  50 A that is coupled to the cutting machine  20 A is also able to display the operation statuses of the cutting machines  20 B to  20 D on the confirmation screen  72 X. 
     As illustrated in  FIG. 10 , a doughnut graph  82  indicating an operating time of the cutting machine  20 A on a weekly basis is provided in a left side of the upper portion  72 A of the confirmation screen  72 X. The first counter  56  counts the operating times of the cutting machines  20 A to  20 D on a weekly basis. The display controller  55  puts the operating time on a weekly basis which has been counted by the first counter  56  into the doughnut graph  82  and displays the doughnut graph  82  on the confirmation screen  72 X of the display  70 . If the operating time that has been counted by the first counter  56  is less than a predetermined time, the display controller  55  displays the doughnut graph  82  in the first color (for example, red) on the confirmation screen  72 X of the display  70 . If the operating time that has been counted by the first counter  56  is the predetermined time or more, the display controller  55  displays the doughnut graph  82  in the second color (for example, blue) which is different from the first color on the confirmation screen  72 X of the display  70 . As will be described later, the above described predetermined time can be arbitrarily set by an operator. 
     As illustrated in  FIG. 10 , a first display area  83  in which an operation ratio that is a ratio (a percentage) of the operating time on a weekly basis which has been counted by the first counter  56  to the predetermined time is displayed is provided in the left side of the upper portion  72 A of the confirmation screen  72 X. The first display area  83  is provided so as to be aligned with the doughnut graph  82 . In this case, the first display area  83  is provided inside the doughnut graph  82 . The display controller  55  displays the above described operation ratio so as to be aligned with the doughnut graph  82  in the first display area  83  of the confirmation screen  72 X of the display  70 . In the example illustrated in  FIG. 10 , if the operation ratio is less than 100%, the display controller  55  displays the doughnut graph  82 , for example, in red and, if the operation ratio is 100% or more, the display controller  55  displays the doughnut graph  82 , for example, in blue. 
     As illustrated in  FIG. 10 , a second display area  84  in which a total operating time on a weekly basis which has been counted by the first counter  56  is displayed is provided in the left side of the upper portion  72 A of the confirmation screen  72 X. The second display area  84  is provided so as to be aligned with the doughnut graph  82 . In this case, the second display area  84  is provided inside the doughnut graph  82 . The second display area is provided under the first display area  83 . The display controller  55  displays the above described total operating time so as to be aligned with the doughnut graph  82  in the second display area  84  of the confirmation screen  72 X of the display  70 . 
     As illustrated in  FIG. 10 , a third display area  85  in which a line graph  85 A and a reference line  85 B are displayed is provided in a central portion of the upper portion  72 A of the confirmation screen  72 X. The line graph  85 A indicates an operation ratio that is a ratio of an operating time on a daily basis to a predetermined time on a weekly basis. In the example illustrated in  FIG. 10 , an abscissa corresponds to a day of week (date) and an ordinate corresponds to the operation ratio. The reference line  85 B corresponds to the predetermined time. The reference line  85 B is displayed so as to overlap with the line graph  85 A. The display controller  55  displays the line graph  85 A and the reference line  85 B in the third display area  85  of the confirmation screen  72 X of the display  70 . The line graph  85 A is displayed, for example, in blue and the reference line  85 B is displayed, for example, in red. 
     As illustrated in  FIG. 10 , a pie chart  86  that indicates a processing ratio that is a ratio of the processing time of each of the workpieces  5  which has been counted to a total time of the processing times of the plurality of workpieces  5  on a weekly basis, which have been counted, and a fourth display area  87  in which each of the processing times of the workpieces  5  is displayed are provided in a right side of the upper portion  72 A of the confirmation screen  72 X. The pie chart  86  and the fourth display area  87  are aligned. The second counter  60  counts each of the processing times of the plurality of workpieces  5  on a weekly basis. The display controller  55  puts the above described processing ratio into the pie chart  86  and displays the pie chart  86  on the confirmation screen  72 X of the display  70 . The display controller  55  displays each of the processing times of the workpieces  5  on a weekly basis in the fourth display area  87  of the confirmation screen  72 X of the display  70 . Note that, in the example illustrated in  FIG. 10 , the workpieces  5  that are used are denoted by A to F, but the workpieces  5  that are used may be denoted by names of materials. 
     As illustrated in  FIG. 10 , a plurality of fifth display areas  88  in which doughnut graphs  82 A of the cutting machine  20 A on a daily basis in a specific week or the like are displayed is provided in a lower portion  72 B of the confirmation screen  72 X so as to be aligned. In the example illustrated in  FIG. 10 , seven fifth display areas  88  are provided but the number of the fifth display areas  88  is not particularly limited. Each of dates of the specific week is displayed in a corresponding one of upper portions  88 A of the fifth display areas  88 . The first counter  56  counts the operating times of the cutting machines  20 A to  20 D on a daily basis. The display controller  55  puts the operating time on a daily basis, which has been counted by the first counter  56 , into the doughnut graph  82 A and displays the doughnut graph  82 A in the fifth display area  88  of the confirmation screen  72 X of the display  70 . The display controller  55  displays an operation ratio that is a ratio (a percentage) of the operating time on a daily basis, which has been counted by the first counter  56 , to a predetermined time so as to be aligned with the doughnut graph  82 A in the fifth display area  88  of the confirmation screen  72 X of the display  70 . The display controller  55  displays a total operating time on a daily basis, which has been counted by the first counter  56 , so as to be aligned with the doughnut graph  82 A in the fifth display area  88  of the confirmation screen  72 X of the display  70 . 
     The second counter  60  counts each of the processing times of the plurality of workpieces  5  on a daily basis. The display controller  55  puts a processing ratio that is a ratio of the processing time of each of the workpieces  5 , which has been counted, to a total time of the processing times of the plurality of workpieces  5 , which have been counted, in a pie chart  86 A and displays the pie chart  86 A in the fifth display area  88  of the confirmation screen  72 X of the display  70 . The display controller  55  displays each of the processing times of the workpieces  5  on a daily basis in a corresponding one of the fifth display areas  88  of the confirmation screen  72 X of the display  70 . 
     As illustrated in  FIG. 10 , for example, in a case in which the operator confirms an operation status of the cutting machine  20 A on a weekly basis on June 24, when the operation status of the cutting machine  20 A of the day (that is, a day on which the operator browses the confirmation screen  72 X) is displayed in the lower portion  72 B of the confirmation screen  72 X, for example, the display controller  55  displays a background of the fifth display area  88  in which the operation status is displayed in blue and displays backgrounds of the fifth display areas  88  in which the operation statuses of the cutting machine  20 A in the other dates are displayed in white. Also, if, in a case in which the operation status of the cutting machine  20 A of the day is displayed, an error has occurred in the cutting machine  20 A, for example, the display controller  55  displays the background of the fifth display area  88  in which the operation status is displayed in red. As described above, the display controller  55  may be configured to display, in a case in which the cutting machine  20 A is in operation on the day, a case in which an error has occurred in the cutting machine  20 A on the day, a case in which an operation has ended already on or before the day, and a case in which an operation is started on or after the day, the background of the fifth display area  88  in different colors. For example, the display controller  55  displays, in the case in which the operation has ended already on or before the day, the background of the fifth display area  88  in white and displays, in the case in which the operation is started on or after the day, the background of the fifth display area  88  in gray. 
     As illustrated in  FIG. 10 , in a top center of the upper portion  72 A of the confirmation screen  72 X, two icons  74  and  75  are aligned side by side. An operation button that is used for simultaneously displaying the plurality of cutting machines  20 A to  20 D on the confirmation screen  72 X is incorporated in the icon  74 . An operation button that is used to display one of the plurality of cutting machines  20 A to  20 D on the confirmation screen  72 X is incorporated in the icon  75 . The operator is able to select one of the icons  74  and  75 . That is, each of the icons  74  and  75  has a function of switching of display of the cutting machines  20 A to  20 D that are displayed on the confirmation screen  72 X. By selecting one of the icons  74  and  75  by an input device (not illustrated), for example, the icon that has been selected is displayed in blue and the icon that has not been selected is displayed in gray.  FIG. 10  illustrates an example of the confirmation screen  72 X that is displayed when the icon  75  is pressed by the input device (not illustrated).  FIG. 11  illustrates an example of the confirmation screen  72 X that is displayed when a tab  76  is pressed by the input device. 
     As illustrated in  FIG. 11 , in the confirmation screen  72 X, a sixth display area  89  in which the operation status of the cutting machine  20 A is displayed, a seventh display area  90  in which the operation status of the cutting machine  20 B is displayed, an eighth display area  91  in which the operation status of the cutting machine  20 C is displayed, and a ninth display area  92  in which the operation status of the cutting machine  20 D is displayed are provided. The sixth to ninth display areas  89  to  92  are aligned in the up-down direction. The operation statuses of the cutting machines  20 A to  20 D that correspond to the upper portion  72 A of the confirmation screen  72 X of  FIG. 10  are listed and displayed in the sixth to ninth display areas  89  to  92  by the display controller  55 , respectively. For example, the display controller  55  lists and displays the doughnut graph  82 , the line graph  85 A, the reference line  85 B, the pie chart  86 , or the like in each of the sixth to ninth display areas  89  to  92 . Note that there may be a case in which the display controller  55  does not display the icons  74  and  75 , and tabs  76  to  79 , and buttons  25  to  28 , which will be described later, in the seventh to ninth display areas  90  to  92 . In each of the sixth to ninth display areas  89  to  92 , a tenth display area  93  in which a non-operating time of the cutting machines  20 A to  20 D is provided. The first counter  56  counts the non-operating time of the cutting machines  20 A to  20 D on a daily basis, weekly basis, and monthly basis. The display controller  55  displays the above described non-operating time in each of the tenth display areas  93  of the sixth to ninth display areas  89  to  92 . Note that, in an example illustrated in  FIG. 11 , the operation statuses of the cutting machines  20 A to  20 D on a weekly basis are displayed, but the operation statuses of the cutting machines  20 A to  20 D on a daily basis or monthly basis can be listed and displayed by pressing a button  28 , which will be described later. 
     As illustrated in  FIG. 10 , in the top center of the upper portion  72 A of the confirmation screen  72 X, the four tabs  76  to  79  are aligned side by side. An operation button that is used to display the use time of each of the plurality of processing tools  6  and a ratio of the use time thereof in the right side of the upper portion  72 A of the confirmation screen  72 X is incorporated in the tab  76 . An operation button that is used to display each of the processing times of the plurality of workpieces  5  and the ratio of the processing time thereof in the right side of the upper portion  72 A of the confirmation screen  72 X is incorporated in the tab  77 . The operator is able to select one of the tabs  76  and  77 . That is, each of the tab  76  and the tab  77  has a function of performing switching on which information of the processing tools  6  or the workpieces  5  is displayed on the confirmation screen  72 X. By selecting one of the tabs  76  and  77  by the input device (not illustrated), for example, the tab that has been selected is displayed in blue and the tab that has not been selected is displayed in gray.  FIG. 10  illustrates an example of the confirmation screen  72 X that is displayed when the tab  77  is pressed by the input device (not illustrated).  FIG. 12  illustrates an example of the confirmation screen  72 X that is displayed when the tab  76  is pressed by the input device. 
     As illustrated in  FIG. 12 , in the confirmation screen  72 X, similar information to that of  FIG. 10  is displayed, except a point that, instead of information of the workpieces  5 , information of the processing tools  6  is displayed. In the right side of the upper portion  72 A of the confirmation screen  72 X, the pie chart  86 H that indicates a use ratio that is a ratio of the use time of each of the processing tools  6 , which has been counted, to a total time of the use times of the plurality of processing tools  6  on a weekly basis, which have been counted, and an eleventh display area  94  that indicates each of the use times of the processing tools  6  are provided. The pie chart  86 H and the eleventh display area  94  are aligned. The third counter  64  counts each of the use times of the plurality of processing tools  6  on a weekly basis. The display controller  55  puts the above described use ratio into the pie chart  86 H and displays the pie chart  86 H on the confirmation screen  72 X of the display  70 . The display controller  55  displays each of the use times of the processing tools  6  on a weekly basis in the eleventh display area  94  of the confirmation screen  72 X of the display  70 . 
     The third counter  64  counts each of the use times of the plurality of processing tools  6  on a daily basis. The display controller  55  puts a use ratio that is a ratio of the use time of each of the processing tools  6 , which has been counted, to a total time of the use times of the plurality of processing tools  6  on a daily basis, which have been counted, into a pie chart  86 K and displays the pie chart  86 K in the fifth display area  88  of the confirmation screen  72 X of the display  70 . The display controller  55  displays each of the use times of the processing tools  6  on a daily basis in a corresponding one of the fifth display areas  88  of the confirmation screen  72 X of the display  70 . 
     An operation button that is used to switch to a screen via which various settings for each of the cutting machines  20 A to  20 D are performed is incorporated in the tab  78 . An operation button that is used to print contents that are displayed on the confirmation screen  72 X is incorporated in the tab  79 .  FIG. 13  illustrates an example of the confirmation screen  72 X that is displayed when the tab  79  is pressed by the input device (not illustrated). 
     As illustrated in  FIG. 13 , in a left side of the upper portion  72 A of the confirmation screen  72 X, an input box  95  in which the operating times of the cutting machines  20 A to  20 D on a daily basis can be set is provided. The operating time can be set in seconds. The operating time on a daily basis is set by inputting an arbitrary operating time in the input box  95  and pressing an OK button  95 A by the input device. When the operating time on a daily basis is set, the operating times on a weekly basis and monthly basis are automatically displayed. Also, in the right side of the upper portion  72 A of the confirmation screen  72 X, examples of the line graph  85 A and the reference line  85 B are displayed for the operating time that has been set. 
     As illustrated in  FIG. 13 , in a left side of the lower portion  72 B of the confirmation screen  72 X, an input box  96  to which information of the workpiece  5  that is used in the cutting machines  20 A to  20 D is input is provided. Setting of the workpiece  5  is completed by inputting a name or a processing possible time of the workpiece  5  to the input box and pressing an OK button  96 A by the input device (not illustrated). When the information of the workpiece  5  is input, the processing possible time of the workpiece  5  and a pie chart  86 X that indicates a processing possible ratio that is a ratio of the processing possible time of each of the workpieces  5  to a total time of the processing possible times of the plurality of workpieces  5  are displayed in a right side of the lower portion  72 B of the confirmation screen  72 X. Also, in a top portion of the upper portion  72 A of the confirmation screen  72 X illustrated in  FIG. 13 , in addition to the tab  78  and the tab  79 , a button  29  is provided. The button  29  has a function of returning display to the confirmation screen  72 X (for example, the confirmation screen  72 X of  FIG. 10 ) on which the operation statuses of the cutting machines  20 A to  20 D are displayed. Note that, in an example illustrated in  FIG. 13 , six input boxes  96  are provided, but the number of the input boxes  96  is not limited thereto. 
     As illustrated in  FIG. 10 , in a top right of the upper portion  72 A of the confirmation screen  72 X, various types of buttons  25  to  28  that are used to display the operation statuses of the cutting machines  20 A to  20 D on a specific date or in a specific period on the confirmation screen  72 X are arranged. As illustrated in  FIG. 14 , the button  25  has a function that is used to display a calendar  25 A on the confirmation screen  72 X. In this case, the calendar  25 A is displayed on the confirmation screen  72 X so as to overlap a portion of the pie chart  86 . In the calendar  25 A, a week that has been selected is inversely displayed. In an example illustrated in  FIG. 14 , the week that has been selected is indicated by diagonal lines. The button  26  has a function of displaying the operation statuses of the cutting machines  20 A to  20 D of a previous week (or a previous date or a previous month) of a week (or a date or a month) which is currently displayed on the confirmation screen  72 X. The button  27  has a function of displaying the operation statuses of the cutting machines  20 A to  20 D of a following week (or a following date or a following month) of a week (or a date or a month) which is currently displayed on the confirmation screen  72 X. 
     The button  28  has a function of displaying the operation statuses of the cutting machines  20 A to  20 D on a weekly basis, a monthly basis, or a daily basis. The operation statuses of the cutting machines  20 A to  20 D can be switched to those on a weekly basis, a monthly basis, or a daily basis by pressing the button  28  by the input device (not illustrated). As illustrated in  FIG. 14 , in a case in which the operation statuses of the cutting machines  20 A to  20 D are displayed on the confirmation screen  72 X on a weekly basis, “1 WEEK” is displayed on the button  28 . Also, in a case in which the operation statuses of the cutting machines  20 A to  20 D are displayed on the confirmation screen  72 X on a daily basis, “1 DAY” is displayed on the button  28  and, in a case in which the operation statuses of the cutting machines  20 A to  20 D are displayed on the confirmation screen  72 X on a monthly basis, “1 MONTH” is displayed on the button  28 . 
       FIG. 15  is a view illustrating the calendar  25 A that is displayed on the confirmation screen  72 X on a monthly basis.  FIG. 16  illustrates the confirmation screen  72 X in which the operation status of the cutting machine  20 A is displayed on a monthly basis and illustrates the confirmation screen  72 X in which the operation status of the cutting machine  20 A in June is displayed when June is selected in the calendar  25 A illustrated in  FIG. 15 . As illustrated in  FIG. 15 , the month that has been selected is inversely displayed. In this case, because June is selected, June in the calendar  25 A is inversely displayed. Also, as illustrated in  FIG. 16 , when display on a monthly basis is selected, a first date and a last date of the month that has been selected are displayed on the button  25 . 
     As illustrated in  FIG. 16 , in the left side of the upper portion  72 A of the confirmation screen  72 X, a doughnut graph  82 B that indicates an operating time of the cutting machine  20 A on a monthly basis is provided. The first counter  56  counts operating times of the cutting machines  20 A to  20 D on a monthly basis. The display controller  55  puts the operating time on a monthly basis, which has been counted by the first counter  56 , into the doughnut graph  82 B and displays the doughnut graph  82 B on the confirmation screen  72 X of the display  70 . If the operating time that has been counted by the first counter  56  is less than the predetermined time, the display controller  55  displays the doughnut graph  82 B in the first color (for example, red) on the confirmation screen  72 X of the display  70 . If the operating time that has been counted by the first counter  56  is the predetermined time or more, the display controller  55  displays the doughnut graph  82 B in the second color (for example, blue) which is different from the first color on the confirmation screen  72 X of the display  70 . 
     As illustrated in  FIG. 16 , in the first display area  83  that is provided in the left side of the upper portion  72 A of the confirmation screen  72 X, an operation ratio that is a ratio (a percentage) of the operating time on a monthly basis, which has been counted by the first counter  56 , to a predetermined time is displayed. The first display area  83  is provided so as to be aligned with the doughnut graph  82 B. In this case, the first display area  83  is provided inside the doughnut graph  82 B. The display controller  55  displays the above described operation ratio in the first display area  83  of the confirmation screen  72 X of the display  70  such that the operation ratio is aligned with the doughnut graph  82 B. 
     As illustrated in  FIG. 16 , in the second display area  84  that is provided in the left side of the upper portion  72 A of the confirmation screen  72 X, a total operating time on a monthly basis, which has been counted by the first counter  56 , is displayed. The second display area  84  is aligned with the doughnut graph  82 B. In this case, the second display area  84  is provided inside the doughnut graph  82 B. The display controller  55  displays the above described total operating time in the second display area  84  of the confirmation screen  72 X of the display  70  such that the total operating time is aligned with the doughnut graph  82 B. 
     As illustrated in  FIG. 16 , in the third display area  85  that is provided in the top center of the upper portion  72 A of the confirmation screen  72 X, a line graph  85 C and the reference line  85 B are displayed. The line graph  85 C indicates an operation ratio that is a ratio of the operating time on a daily basis to a predetermined time on a monthly basis. The display controller  55  displays the line graph  85 C and the reference line  85 B in the third display area  85  of the confirmation screen  72 X of the display  70 . The line graph  85 C is displayed, for example, in blue and the reference line  85 B is displayed, for example, in red. 
     As illustrated in  FIG. 16 , in the right side of the upper portion  72 A of the confirmation screen  72 X, a pie chart  86 Y that indicates a processing ratio that is a ratio of the processing time of each of the workpieces  5 , which has been counted, to a total time of the processing times of the plurality of workpieces  5  on a monthly basis, which have been counted, is provided. In the fourth display area  87  that is provided in the right side of the upper portion  72 A of the confirmation screen  72 X, each of the processing times of the workpieces  5  on a monthly basis is displayed. The pie chart  86 Y and the fourth display area  87  are aligned. The second counter  60  counts each of the processing times of the plurality of workpieces  5  on a monthly basis. The display controller  55  puts the above described processing ratio into the pie chart  86 Y and displays the pie chart  86 Y on the confirmation screen  72 X of the display  70 . The display controller  55  displays each of the processing times of the workpieces  5  on a monthly basis in the fourth display area  87  of the confirmation screen  72 X of the display  70 . 
     Note that, in the example illustrated in  FIG. 16 , in the right side of the upper portion  72 A of the confirmation screen  72 X, information of the workpieces  5  is displayed but information of the processing tools  6  may be displayed. In this case, instead of the pie chart  86 Y, a pie chart that indicates a ratio of the use time of each of the processing tools  6 , which has been counted, to a total time of the use times of the plurality of processing tools  6  on a monthly basis, which have been counted, is provided. Also, in the fourth display area  87 , each of the use times of the processing tools  6  on a monthly basis is displayed. The third counter  64  counts each of the use times of the plurality of processing tools  6  on a monthly basis. The display controller  55  puts the above described use ratio into a pie chart and displays the pie chart on the confirmation screen  72 X of the display  70 . The display controller  55  displays each of the use times of the processing tools  6  on a monthly basis in the fourth display area  87  of the confirmation screen  72 X of the display  70 . 
     As illustrated in  FIG. 16 , in the lower portion  72 B of the confirmation screen  72 X, the plurality of fifth display areas  88  in which the doughnut graphs  82 A of the cutting machine  20 A on a daily basis in a specific month or the like is provided so as to be aligned. The fifth display areas  88  can be scrolled in the left-right direction. 
       FIG. 17  is a view illustrating the calendar  25 A that is displayed on the confirmation screen  72 X on a daily basis.  FIG. 18  illustrates the confirmation screen  72 X on which the operation status of the cutting machine  20 A is displayed on a daily basis and illustrates the confirmation screen  72 X on which the operation status of the cutting machine  20 A on May 16 is displayed when May 16 is selected in the calendar  25 A illustrated in  FIG. 17 . As illustrated in  FIG. 17 , the date that is selected is inversely displayed. In this case, May 16 is selected, and therefore, May in the calendar  25 A is inversely displayed. Also, as illustrated in  FIG. 18 , when display on a daily basis is selected, a date that has been selected is displayed on the button  25 . 
     As illustrated in  FIG. 18 , in the left side of the upper portion  72 A of the confirmation screen  72 X, the doughnut graph  82 A that indicates the operating time of the cutting machine  20 A on a daily basis is provided. The display controller  55  puts the operating time on a daily basis, which has been counted by the first counter  56 , into the doughnut graph  82 A and displays the doughnut graph  82 A in the left side of the upper portion  72 A of the confirmation screen  72 X of the display  70 . If the operating time that has been counted by the first counter  56  is less than a predetermined time, the display controller  55  displays the doughnut graph  82 A in the first color (for example, red) on the confirmation screen  72 X of the display  70 . If the operating time that has been counted by the first counter  56  is the predetermined time or more, the display controller  55  displays the doughnut graph  82 A in the second color (for example, blue) which is different from the first color on the confirmation screen  72 X of the display  70 . The display controller  55  displays an operation ratio that is a ratio (a percentage) of the operating time on a daily basis, which has been counted by the first counter  56 , to the predetermined time in the first display area  83  of the confirmation screen  72 X of the display  70  such that the operating time is aligned with the doughnut graph  82 A. The display controller  55  displays the total operating time on a daily basis, which has been counted by the first counter  56 , so as to be aligned with the doughnut graph  82 A in the second display area  84  of the confirmation screen  72 X of the display  70 . 
     As illustrated in  FIG. 18 , a bar chart  86 P is displayed in the third display area  85  that is provided in the central portion of the upper portion  72 A of the confirmation screen  72 X. The bar chart  86 P indicates the processing time of each of the workpieces  5  on a daily basis. In an example illustrated in  FIG. 18 , an abscissa corresponds to a material name of the workpiece  5  and an ordinate corresponds to the processing time. The display controller  55  displays the bar chart  86 P in the third display area  85  of the confirmation screen  72 X of the display  70 . Note that the bar chart  86 P may indicate the use times of the processing tools  6  on a daily basis. 
     As illustrated in  FIG. 18 , in the right side of the upper portion  72 A of the confirmation screen  72 X, a pie chart  86 Q that indicates a processing ratio that is a ratio of the processing time of each of the workpieces  5 , which has been counted, to a total time of the processing times of the plurality of workpieces  5  on a daily basis, which have been counted, and a twelfth display area  97  that indicates each of the processing times of the workpieces  5  on a daily basis are provided. The pie chart  86 Q and the twelfth display area  97  are aligned in the up-down direction. The display controller  55  puts the above described processing ratio into the pie chart  86 Q and displays the pie chart  86 Q on the confirmation screen  72 X of the display  70 . The display controller  55  displays each of the processing times of the workpieces  5  on a daily basis in the twelfth display area  97  of the confirmation screen  72 X of the display  70 . Note that, in the example illustrated in  FIG. 18 , the workpiece  5  that is used is denoted by a material name but the workpiece that is used may be denoted by symbols A to F or the like. Note that the pie chart  86 Q may indicate a use ratio that is a ratio of the use time of each of the processing tools  6 , which has been counted, to a total time of the use times of the plurality of processing tools  6  on a daily basis, which have been counted. Each of the use times of the processing tools  6  on a daily basis may be indicated in the twelfth display area  97 . 
     As illustrated in  FIG. 18 , in the lower portion  72 B of the confirmation screen  72 X, job data of the cutting machine  20 A on a specific date is displayed. The display controller  55  causes the confirmation screen  72 X of the display  70  to list and display the job data on a daily basis. Each information of a job data name, a total processing time, a processing time per workpiece, an adaptor symbol, an adaptor acquisition time, and an adaptor return time is associated with the job data. In  FIG. 18 , in the lower portion  72 B of the confirmation screen  72 X, display sections  18 A to  18 L in which the above described each information is displayed are provided. Also, in the lower portion  72 B of the confirmation screen  72 X, error information of an error that has occurred in the cutting machine  20 A on the specific date can be displayed for each job data. For the error information, for example, a background is displayed in red. The controller  54  counts the number of crown prostheses that have been produced, based on the job data. 
     As described above, in the cutting system  10  according to this preferred embodiment, the display  70  displays the operation statuses of the cutting machines  20 A to  20 D. In this case, the display controller  55  puts the operating time that has been counted into the doughnut graph  82  and displays the doughnut graph  82  on the screen  72  of the display  70 . Therefore, the operator can easily confirm the operating times of the cutting machines  20 A to  20 D by checking the corresponding doughnut graphs  82 . Furthermore, when the doughnut graph  82  is displayed in the first color (for example, red), the operator can easily confirm that the operating time of a corresponding one of the cutting machines  20 A to  20 D is less than the predetermined time. Also, when the doughnut graph is displayed in the second color (for example, blue), the operator can easily confirm that the operating time of a corresponding one of the cutting machines  20 A to  20 D is the predetermined time or more. In the above described manner, the operator can accurately confirm the operation statuses of the cutting machines  20 A to  20 D by a simple method of checking the doughnut graph  82  that is displayed on the display  70 . 
     In the cutting system  10  of this preferred embodiment, the display controller  55  displays the ratio of the operating time that has been counted to the predetermined time in the first display area  83  of the confirmation screen  72 X of the display  70  such that the ratio is aligned with the doughnut graph  82 . Thus, the operator can more accurately confirm the operation statuses of the cutting machines  20 A to  20 D. 
     In the cutting system  10  of this preferred embodiment, the display controller  55  displays the doughnut graphs  82  of the cutting machines  20 A to  20 D on a daily basis in the fifth display areas  88  of the confirmation screen  72 X of the display  70  such that the doughnut graphs  82  are aligned in a lateral direction. Thus, the operator can easily compare the operating times for the cutting machines  20 A to  20 D on a daily basis in a specific period (for example, a specific week or a specific month) with one another. 
     In the cutting system  10  of this preferred embodiment, the display controller  55  displays the line graph  85 A that indicates the ratio of the operating time on a daily basis to the predetermined time on a weekly basis or the line graph  85 C that indicates the ratio of the operating time on a daily basis to the predetermined time on a monthly basis, and the reference line  85 B that corresponds to the predetermined time in the third display area  85  of the confirmation screen  72 X of the display  70 . Thus, the operator can easily confirm on which operation date the operating time is the predetermined time or more or less than the predetermined time in a specific period. 
     In the cutting system  10  of this preferred embodiment, the controller  54  includes the second counter  60  that counts each of the processing times of the plurality of workpieces  5  in a predetermined unit (for example, on a daily basis, a weekly basis, or a monthly basis). The display controller  55  puts the ratio of the processing time of each of the workpieces, which has been counted, to a total time of the processing times, which have been counted, into the pie chart  86 ,  86 A,  86 Y and displays the pie chart  86 ,  86 A,  86 Y on the confirmation screen  72 X of the display  70 . Thus, the operator can easily confirm a processing status of each of the workpieces  5  by checking the pie chart  86 ,  86 A,  86 Y. 
     In the cutting system  10  of this preferred embodiment, the display controller  55  displays the pie charts  86 A of the workpieces  5  on a daily basis on the confirmation screen  72 X of the display  70  such that the pie charts  86 A are aligned. Thus, the operator can easily compare the processing times of the workpieces  5  on a daily basis in a specific period. 
     In the cutting system  10  of this preferred embodiment, the controller  54  includes the third counter  64  that counts each of the use times of the plurality of processing tools  6  in a predetermined unit (for example, on a daily basis, a weekly basis, or a monthly basis). The display controller  55  puts the ratio of the use time of each of the processing tools  6 , which has been counted, to the total time of the use times that have been counted, into the pie chart  86 H,  86 K and displays the pie chart  86 H,  86 K on the display  70 . Thus, the operator can easily confirm a use status of each of the processing tools  6  by checking the pie chart  86 H,  86 K. 
     In the cutting system  10  of this preferred embodiment, the display controller  55  displays the pie charts  86 K of the processing tools  6  on a daily basis on the confirmation screen  72 X of the display  70  such that the pie charts  86 K are aligned in the lateral direction. Thus, the operator can easily compare the use times of the processing tools  6  on a daily basis in a specific period. 
     In the cutting system  10  of this preferred embodiment, the display controller  55  causes the confirmation screen  72 X of the display  70  to list and display job data that corresponds to a crown prosthesis that has been produced on a daily basis. Thus, the operator can easily confirm which and how many crown prostheses have been produced on a specific day. 
     In the cutting system  10  of this preferred embodiment, the display controller  55  causes the confirmation screen  72 X of the display  70  to list and display the doughnut graph  82 ,  82 A,  82 B for each cutting machines  20 A to  20 D. Thus, the operator can compare the operating times to one another for each of the cutting machines  20 A to  20 D. 
     Preferred embodiments of the present invention have been described above. However, the above-described preferred embodiments are merely examples and the present invention may be implemented in various other forms. 
     In an above-described preferred embodiment, the operating times of the cutting machines  20 A to  20 D on a daily basis, a weekly basis, or a monthly basis are displayed in donut graphs, but display of the operating time is not limited thereto. The operating time may be displayed in a graph of some other type, such as a pie chart, a bar chart, or the like. 
     In an above described preferred embodiment, the operating times of the cutting machines  20 A to  20 D, the processing times of the workpieces  5 , and the use times of the processing tools  6  are displayed on a daily basis, a weekly basis, or a monthly basis but may be displayed on a yearly basis. Also, in the cutting system  10 , instead of the above described units, the operator can set an arbitrary unit (for example, every five days, every three weeks, every three months, or the like). 
     In an above described preferred embodiment, the pie chart  86  that indicates the processing ratio and the pie chart  86 H that indicates the use ratio are separately displayed, but the pie chart  86  and the pie chart  86 H may be displayed on the same confirmation screen  72 X. 
     In an above described preferred embodiment, the operating times of the cutting machines  20 A to  20 D or the like are calculated in the operation terminals  50 A to  50 D coupled to the cutting machines  20 A to  20 D, respectively, but calculation of the operating times is not limited thereto. The operating times of the cutting machines  20 A to  20 D or the like may be calculated in one of the operation terminals  50 A to  50 D. 
     In an above described preferred embodiment, the four operation terminals  50 A to  50 D are used for the cutting machines  20 A to  20 D, but the number of operation terminals for the cutting machines  20 A to  20 D is not limited thereto. For example, a configuration in which the cutting machines  20 A to  20 D and one operation terminal are coupled may be used. 
     In an above described preferred embodiment, the workpiece  5  to which the adaptor  8  is attached is automatically attached to and detached from the clamp  36  by the conveyor  44 , but the configuration of a cutting machine according to the present invention is not limited thereto. A cutting machine according to a preferred embodiment of the present invention may be a cutting machine that does not include the conveying device  40  and with which an operator manually attaches and detaches the workpiece  5  to which the adaptor  8  is attached to and from the clamp  36 . 
     The above described cutting system  10  includes the server  12  and the router  14 , but the cutting system  10  may be a cutting system of a stand-alone type in which the server  12  and the router  14  are omitted. 
     The terms and expressions used herein are for description only and are not to be interpreted in a limited sense. These terms and expressions should be recognized as not excluding any equivalents to the elements shown and described herein and as allowing any modification encompassed in the scope of the claims. The present invention may be embodied in many various forms. This disclosure should be regarded as providing preferred embodiments of the principles of the present invention. These preferred embodiments are provided with the understanding that they are not intended to limit the present invention to the preferred embodiments described in the specification and/or shown in the drawings. The present invention is not limited to the preferred embodiments described herein. The present invention encompasses any of preferred embodiments including equivalent elements, modifications, deletions, combinations, improvements and/or alterations which can be recognized by a person of ordinary skill in the art based on the disclosure. The elements of each claim should be interpreted broadly based on the terms used in the claim, and should not be limited to any of the preferred embodiments described in this specification or used during the prosecution of the present application. 
     While preferred embodiments of the present invention have been described above, it is to be understood that variations and modifications will be apparent to those skilled in the art without departing from the scope and spirit of the present invention. The scope of the present invention, therefore, is to be determined solely by the following claims.