Abstract:
A method for determining a bending order for bending a work piece includes displaying an exploded drawing of a workpiece, tracing lines to be bent of the exploded drawing in an order of bending and changing a display color of the traced line.

Description:
This is a division of U.S. patent application Ser. No. 09/028,997 now U.S. Pat. No. 6,236,399, filed Feb. 25, 1998, the contents of which are expressly incorporated by reference herin in its entirety. 
    
    
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     This invention relates to a display method for information setting screens for displaying a plurality of information setting screens along the flow of the process in a machine tool and a NC apparatus of multi-window type having such function. 
     2. Description of the Prior Art 
     Generally, almost all machine tools (bending, punch press, laser, electrical discharge machining, etc.) contain NC apparatus. By operating this NC apparatus, a machining program in which part will be processed how has been determined is produced, and according to this machining program (or called NC program) the machine tool is controlled. Thus, the NC apparatus has plurality of operation keys of various kinds. 
     For example, the NC apparatus of a beading machine shown in FIG. 1 has mode key section  3  including a home position mode key  3   a , manual mode key  3   b , memory mode key  3   c , operation mode key  3   d , play-back mode key  3   e , data input/output mode key  3   f  and maintenance mode key  3   g , function key section  4  containing F1 key, F2 key, . . . and the like. 
     On a display screen  5 , buttons such as shape input software button, bending order input software button, angle input software button, direct input software button and the like are indicated. These buttons correspond to each of the function keys, for example F1 corresponds to shape input software button. Further, the screen is overlaid with a touch panel  6 . 
     When a new product is produced using such NC apparatus, an operator produces products through operation steps which will described below. 
     When obtaining a new product, the operator first presses the memory mode  3   c . According to this memory mode  3   c , the NC apparatus  2  displays data list comprising a plurality of processing schedules (including information about NC program, due date, production amount, material, punch, die and the like) preliminarily stored on its screen. 
     Next, the operator operates the touch panel  6  to select desired items from this data list and then press the F1 to select the shape input software key. 
     When the shape input software key is selected, the NC apparatus  2  displays workpiece dies information relating to the selected processing schedule, preliminarily stored on the screen. 
     Next, the operator selects a desired workpiece and dies (die, punch) from the workpiece dies information displayed on the screen. 
     If a workpiece and dies are selected, the NC apparatus  2  displays an exploded view for determining in what order a product of a selected processing schedule will be processed. This exploded view is preliminarily stored in the memory. 
     Then, the operator inputs processing order through this exploded view. For example, he determines a process by tracing a line on the exploded view. The NC apparatus  2  produces a program for controlling the bending machine  1  according to a processing order determined on the exploded view. 
     Next, the operator sets for dies installation. This setting for dies installation is carried out by pressing the home position mode key  3   a . If the home position mode key  3   a  is pressed, the NC apparatus  2  displays a screen for determining a current value of a dies installation metal and the current value inputted through this screen is sent to the ATC for processing. 
     However, although in such conventional NC apparatus, in what order the keys and buttons must be operated depending on a target product is determined, the keys and buttons provided on the NC apparatus are not arranged along that order. 
     Thus, an inexperienced operator cannot see in what order the keys and buttons should be operated easily. This is a problem which should be solved about the prior art. 
     For example, in the conventional NC apparatus for the bending machine, when a new product is obtained, after the memory mode key is selected to input predetermined information, for example, the operator must select a home position mode key located far, not a nearby key or must select any junction key (F1 key, F2 key, . . . ). 
     Even if the operation order of the keys and buttons has been known, the operation screen is changed each time when the key or button Is operated. 
     That is, in the conventional NC apparatus, for setting various kinds of information about a single mode, plural screens are displayed in time series and then such plural kinds of information must be set one by one through each of the screens. Therefore, work efficiency according to the conventional art is very low. This is a problem to be solved by the present invention. 
     SUMMARY OF THE INVENTION 
     The present invention has been proposed to solve the above described problem and it therefore is am object of the invention to provide a multi-window type NC apparatus having an indication method and function which enables an inexperienced operator on site to easily see what should be done next through a display screen and input and set almost all information necessary for each mode through a single screen. 
     To achieve the above object, there is provided an display method for information setting screen along process flow comprising the steps of: indicating a plurality of icons for information setting for each of a plurality of working processes in a machine tool; reading various programs for machining of a product and production image data for the product; combining information setting screen program of a program relating to each icon and production image data, according to a preset combination condition of each icon when the various programs and the production image data are read after the plurality of icons are displayed; and when one of the plurality of icons displayed is selected, displaying a screen of the information petting screen program and a screen of the production image data corresponding to the selected icon, in a region different from a region in which the plurality of icons are displayed. 
     According to a preferred embodiment of the present invention, display of the plurality of icons is carried out at the same time when the system is started. 
     Further according to a preferred embodiment thereof, a screen displayed when the system is started includes a plurality of processing schedules containing NC program, due data for products, product quantity, and tool type. 
     Still further according to a preferred embodiment thereof, the production image data is represented by 3-dimensional diagrams or exploded diagrams. 
     To achieve the above object from another aspect, there is further provided a multi-window type NC apparatus wherein a plurality of screens are opened on a display portion at the same time and the display portion is overlaid with a touch panel, comprising: a memory storing a plurality of icons for information setting for each of a plurality of working processes in a machine tool in an order of the plurality of working processes; a process flow icon indication instruction portion for reading and indicating the plurality of icons stored in the memory when the system is started; an icon corresponding program combination portion for combining information setting screen program of a program relating to each icon and production image data, according to a preset combination condition of each icon, when the plurality of icons are read; and an indication instruction portion for dispatching an Instruction for, when one of the plurality of icons displayed is selected, displaying a screen of the information setting screen program and a screen of the production image data corresponding to the selected icon, in a region different from a region in which the plurality of icons are displayed. 
     According to a preferred embodiment of the invention, the indication instruction portion dispatches an instruction for indicating a plurality of machining schedules containing NC program, due data for products, product quantity, and tool type, in a region different from a region in which the plurality of icons are displayed. 
     To achieve the above object from still another aspect, there is further provided a method for determining bending order for bending a workpiece, comprising the steps of: displaying an exploded drawing of a workpiece on a display device; tracing lines to be bent of the exploded drawing with a finger in an order of bending: changing a display color of the traced lines to a predetermined color. 
     According to a preferred embodiment of the invention. A method for determining bending order for bending a workpiece further comprises the step of displaying numbers of bending order near the traced lines. 
     To achieve the above object from still another aspect, there is further provided a method for determining disposition of dies comprising the steps of: displaying dies selected for each bending process on a display device; dragging a vertical line which represents machine center horizontally on a screen so as to move all punches and dies in conformity with a movement of the vertical line. 
     To achieve the above object from still another aspect, there is further provided a method for determining disposition of dies comprising the steps of: displaying dies selected for each bending process on a display device; specifying a punch or die as a target punch or die so as to display a vertical line on the specified punch or die; dragging the vertical line horizontally on a screen so as to move the specified punch or die in conformity with a movement of the vertical line. 
     The nature, principle and utility of the invention will become more apparent from the following detailed description when read in conjunction with the accompanying drawings. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     In the accompanying drawings: 
     FIG. 1 is an appearance view of a conventional NC apparatus; 
     FIG. 2 is a schematic construction diagram of a multi-window type NC apparatus according to an embodiment of the present invention; 
     FIG. 3 is an appearance view of the multi-window type NC apparatus according to the present embodiment; 
     FIG. 4 is a construction diagram of a system in which the multi-window type of the present embodiment is applied; 
     FIG. 5 is an explanatory diagram for a schedule selection screen for bending; 
     FIG. 6 is a flow chart for explaining icon indication procedure; 
     FIG. 7 is an explanatory diagram for the schedule selection screen for laser; 
     FIG. 8 is an explanatory diagram for the schedule selection screen for punching; 
     FIG. 9 is a flow chart for explaining schedule selection procedure; 
     FIG. 10 is a program block diagram of icon corresponding program combination portion; 
     FIG. 11 is an explanatory diagram for the simulation screen on the schedule selection screen; 
     FIG. 12 is an explanatory view for the bending order screen; 
     FIG. 13 is an explanatory view for the dies instruction screen; 
     FIG. 14 is an explanatory view for the dies disposition screen; 
     FIG. 15 is an explanatory view for the simulation screen; 
     FIG. 16 is an explanatory view for the setup screen; 
     FIG. 17 is an explanatory view for the production trial bending screen; 
     FIG. 18 is an explanatory view for the inspection screen; 
     FIG. 19 is an explanatory view for the achievement screen; 
     FIG. 20 is an explanatory view for a screen for laser; and 
     FIG. 21 is an explanatory view for a screen for punching press. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     FIG. 2 is a schematic construction diagram of a NC apparatus of multi-window type according to the present invention. FIG. 3 is an appearance view of the NC apparatus of multi-window type of the present invention. 
     In the NC apparatus  10  of multi-window type shown in FIG. 2, an operator selects each of various information setting screens of respective steps according to the order of operations of machine tool. Through the multi-window displays, the operator is capable of inputting plural kinds of information all at once. Thus, as shown in FIG. 3, this apparatus has no mode key or function key unlike conventional types. 
     As shown in FIG. 4, such multi-window type NC apparatus  10  is often connected to a parent station  11 , CAD personal computer  12 , automatic programming apparatus  13  and other devices through LAN  14 . 
     In this system, the parent station  11  acting as a sever transmits CAD data (3-dimensional posture drawings exploded views) of product corresponding to its machining schedule (information about NC program, due date, production amount, material, punch, die, repeat product and the like) to hard disk  15  of the NC apparatus  10 . 
     In the multi-window type NC apparatus  10 , as shown in FIG. 2, a LCD  18  is overlaid with a touch panel  19 . This touch panel  19  is controlled by a panel controller  22 . This panel controller  22  drives the touch panel  19  and sends position data indicating a pressed position of the touch panel  19  to a computer main unit  23 . The LCD  18  is controlled by the LCD controller  21 . 
     The computer main unit  23  comprises a multi-window controller  24  which opens a plurality of screens on the LCD  18  at the same time, a program administrator  25  which fetches various information stored in the disk  15  into a internal main memory  27  and administers the fetched programs so as to display programs in the main memory  27 , and a graphic accelerator  26  (hereinafter referred to as GUI) which is started according to an instruction from the program administrator  25 . 
     The computer main unit  23  comprises a process flow icon indication instruction portion  29 , operation key indication instruction portion  30 , schedule selection screen indication instruction portion  31 , icon corresponding program combination portion  32 , icon corresponding program screen instruction portion  33 , a file  34  in which combination conditions of icon and program are stored, a file  35  for storing program information of previously produced products in each process, a file  36  for storing a predetermined program corresponding to icon produced by the icon corresponding program screen instruction portion  33 , and data transfer control portion  38 . 
     &lt;Detailed description of respective portions&gt; 
     When the start switch (not shown) is pressed, the schedule ion is selected or process flow icon display is requested, the process flow icon indication instruction portion  29  displays an icon group in which ions indicating various information setting screens of respective steps are arranged in the order of the operations of machine tools (top is schedule icon) on the LCD and turns on the top icon. 
     For example, in the NC apparatus for bending machine, icon group Ai shown in FIG. 5 is indicated. 
     According to the indication of the icon group Ai, the process flow icon indication instruction portion  29  starts the icon corresponding program combination portion  32 , schedule selection screen indication instruction portion  31  and icon corresponding program screen instruction portion  33 . 
     When the process flow icon indication instruction portion  29  is notified by the operation key indication instruction portion  30  which will be described later, that an icon has been selected, the name of the selected icon is notified to the icon corresponding program screen instruction portion  33 . 
     Further, when an icon previous key or next key which will be described later is selected by the operation key indication instruction portion  30 , an icon forward of or backward of a currently lit icon is turned on and the name of the lit icon (hereinafter referred to as icon parameter ai) is notified to the icon corresponding program screen instruction portion  33 . 
     The operation key indication instruction portion  30  displays button key, function key, Item previous key, item next key and the like, and notifies pressing of these keys to the schedule selection screen indication instruction portion  31  and process low icon indication instruction portion  29 . 
     The button keys include, as for example shown in FIG. 5, list button Ba 1 , operation information button Ba 2 , product drawing information button Ba 3  and the like. 
     The schedule selection screen indication instruction portion  31  displays today&#39;s machining schedule Hi stored in the main memory  27  and CAD data corresponding to this machining schedule Hi in the form of drawing at the same time. 
     In FIG. 5, four machining schedules Hb 1 , Hb 2 , Hb 3 , Hb 4  are displayed and 3-dimensional posture drawings Cb 1 , Cb 2 , Cb 3 , Cb 4  of products based on these machining schedules are displayed. 
     When started, the icon corresponding program combination portion  32  reads an icon parameter ai in the file  34  storing combination conditions, match the icon parameter ai with all program information Pi (or called information input setting screen program) related to this icon parameter ai according to a combination condition bi of this icon parameter and stores those icon and program in the file  36 . 
     At this time, the icon corresponding program combination portion  32  determines whether a product in NC program of the machining schedule is a new product or repeat product, Then, if it is a new product, the icon corresponding program combination portion  32  stores an icon corresponding program based on the combination condition bi in the file  36  as described above. 
     If it is the repeat product, a program name pi relating to production order, tool, die and the like of an already determined product (stored in the name of NC program) is fetched out from the file  35  storing previous information and then stored in the file  36  in correspondence to the icon parameter ai. 
     The icon corresponding program screen instruction portion  33  sets a program information name corresponding to a selected icon parameter ai in the program administrator  25  and displays a program screen of the set program information pi on the LCD. 
     The data transfer control portion  38  communicates with the parent station and stores machining schedule and CAD data sent from the parent station in the disk  15 , and transforms data based on a transfer instruction to its predetermined style and send it to the parent station. Further it stores control information sent from the machine tool main unit in the disk  15 . 
     For bending, the main memory  27  contains information setting screen programs such as bending order instructing image display treatment, dies selective input screen display treatment, dies disposition Input screen display treatment, bending simulation display treatment, setup input screen display treatment, trial bending display treatment, inspection screen display treatment, achievement screen input display treatment and the like. 
     For laser, information setting screen programs such as production condition information input screen display treatment, material/clamp setting screen display treatment and the like are stored. 
     Further for punching, information setting screen programs such as dies information screen treatment, material/clamp setting screen display treatment, production screen treatment, classification screen treatment and the like are stored. 
     Further, picture data of respective icons of icon group Ai are also stored in the main memory  27 . 
     &lt;Description of Motion&gt; 
     The motion of the NC apparatus of multi-window type having the above described construction will be described below. In this description, it is assumed that the machining schedule H 1  and CAD data have been already stored in the disk  15 . 
     First, icon representation will be described with reference to a flow chart shown in FIG.  6 . The process flow icon indication instruction portion  29  monitors to check if the system is turned ON, any schedule icon is selected, display of the icon group A 1  is requested, and icon previous key/next key has been pressed (S 1 , S 2 , S 3 , S 4 ). Next, if it is determined that the system is turned ON at step S 1 , the icon corresponding program combination portion  32  is started(S 5 ) so as to determine whether or not production of combination of icon corresponding program information has been completed(S 6 ). The processing of the icon corresponding program combination portion  32  will be described later with reference to drawing. 
     When it is determined that the combination procedure has been completed at step S 5 , the process flow icon group Ai is displayed by the program administrator  25 (S 7 ). 
     If the process flow icon group Ai at step S 7  is assumed to be stored in the main memory  27  in the order of schedule icon image, bending order, dies instruction icon image, setup icon image, inspection icon image, . . . for a bending machine, as shown in FIG. 5, schedule icon Aa 1 , bending order/dies instruction icon Aa 2 , setup icon Aa 3 , inspection icon Aa 4 , . . . are displayed in this order. 
     As for laser, if schedule icon image, production condition icon image, material instruction icon image, production icon image, inspection icon image, classification icon image, achievement icon image, . . . are assumed to be stored in the main memory  27  in this order, as shown in FIG. 7, schedule icon AL 1 , production condition icon AL 2 , material instruction icon AL 3 , production icon AL 4 , inspection icon AL 5 , classification icon AL 6 , achievement icon AL 7 , . . . are displayed in this order. 
     Further, as for punching press, if punching schedule icon image, clamp material icon image, production icon image, classification icon image, inspection icon image, achievement icon image, . . . are stored in the main memory  27  in this order, as shown in FIG. 8, punching schedule icon AP 1 , clamp material icon AP 2 , production icon AP 3 , classification icon AP 4 , inspection icon AL 5 , achievement icon AL 6 , . . . are displayed in this order. 
     The process flow icon indication Instruction portion  29  notifies the icon corresponding program screen instruction portion  33  that selection of schedule ion has been performed (S 8 ) and at the same time actuates the schedule selection screen indication instruction portion  31  (S 9 ). 
     At step S 8 , the icon corresponding program screen instruction portion  33  notifies the schedule selection screen indication instruction portion  31  of a storage address in the file  36  for program information pi corresponding to schedule icon Ai. 
     The schedule selection screen indication instruction portion  31  reads program information pi (plural) of a notified storage address from the file  36  and displays a program screen (information setting screen) of program information by the program administrator  25 . 
     The program screen displayed by the schedule selection screen indication instruction portion  31  includes machining schedule (information about NC program, due date, production amount, material, punch, die, repeat product, etc.) screen and 3-dimensional posture drawing screen (or exploded view) of a product based on each NC program of each machining schedule. The display of the 3-dimensional posture drawing or exploded view Is achieved by program administrator  25 &#39;s sending CAD data stored in the memory  27  to GUI. 
     For bending machine, the aforementioned 3-dimensional posture drawings include, for example, machining schedules Hb 1 , Hb 2 , Hb 3 , Hb 4  and 3-dimensional posture drawings Cb 1 , Cb 2 , Cb 3 , Cb 4  of product based on the machining schedules Ha 1 , Ha 2 , Ha 3 , Ha 4 , as shown in FIG.  5 . 
     As for laser, the 3-dimensional posture drawings include machining schedules HL 1 , HL 2 , HL 3 , HL 4  and 3-dimensional posture drawings CL 1 , CL 2 , CL 3 , CL 4  of product based on the machining schedules HL 1 , HL 2 , HL 3 , HL 4 , as shown in FIG.  7 . 
     Further, as for punching, the 3-dimensional posture drawings include machining schedules Hp 1 , Hp 2 , Hp 3 , Hp 4  and 3-dimensional posture drawings Cp 1 , Cp 2 , Cp 3 , Cp 4  of product based on the machining schedules Hp 1 , Hp 2 , Hp 3 , Hp 4 , as shown in FIG.  8 . 
     Next, the process flow icon indication instruction portion  29  determines whether or not display of schedule selection screen is terminated (S 10 ) and if the display of schedule selection screen is terminated, immediately turns on the schedule ion A 1 (S 11 ). 
     For bending, the schedule icon Ab 1  of FIG. 5 is lit, for laser, the schedule icon AL 1  of FIG. 7 is lit, and for punching, the schedule icon Ap 1  of FIG. 8 is lit. 
     If the schedule icon A 1  is selected at step S 2 , you go to step S 9  in which the schedule selection screen indication instruction portion  31  is actuated to display the schedule Hi and 3-dimensional posture drawing Ci corresponding to the schedule icon A 1 . At this time, the schedule selection screen indication instruction portion  31  actuates the process flow icon indication instruction portion  29  and operation key indication instruction portion  30 , so as to display the icon group Ai, function keys, button keys, previous/next item keys. 
     That is, for bending, the multi-window screen of the schedule selection shown in FIG. 5 is displayed, for laser, the multi-window screen of the schedule selection shown in FIG. 7 is displayed and for punching, the multi-window screen of the schedule selection shown in FIG. 8 is displayed. 
     If there is a request for icon group indication from other processing section at step S 3 , the process flow icon indication instruction portion  29  displays process flow icon Ai(S 12 ) and terminates this processing. That is, in other program screen, the process flow icon Ai can be displayed. 
     When it is determined that the previous or next key has been pressed at step S 4 , the currently lit icon is turned off(S 13 ). 
     Then, an icon before or after the lit icon is turned on(S 14 ) and the kind of an icon lit at step S 14  is notified to the icon corresponding program screen instruction portion  33 (S 15 ). 
     The icon corresponding program screen instruction portion  33  retrieves a program corresponding to the notified icon and then notifies the program administrator  25  of it. 
     The program administrator  25  starts a program corresponding to the notified program information and displays the screen of that program. The program screen will be described later. 
     The aforementioned processing from step S 13  to step S 14  is such that for example, if the next key is pressed when a schedule selection screen for bending machine of FIG. 5 is displayed, the schedule icon Ab 1  is turned off and then the bending order/dies instruction icon Aa 2  is turned on. 
     Next, the processing of the schedule selection screen indication instruction portion  31  will be described according to a flow chart of FIG.  9 . 
     When the system is turned ON, the schedule selection screen indication instruction portion  31  makes the program administrator  25  to read all machining schedule Hi for today from the hard disk  15  to the main memory  27 (S 21 ), displays four machining schedules Hi of them on the LCD  18 (S 22 ) and at the same time, indicates a total number of the machining schedule of today (S 23 ). In FIG. 5, the total number of  10  is indicated. 
     Next, the schedule selection screen indication instruction portion  31  reads CAD data name corresponding to the displayed four machining schedules from the file  36 , notifies the CAD data name to the program administrator  25 (S 24 ) and displays the CAD data graphically (S 25 ). The program administrator  25  displays the CAD data corresponding to the CAD data name stored in the main memory  27  on the screen in the form of 3-dimensional drawing by means of the GUI. 
     For example, for bending, the 3-dimensional posture drawings Cb 1 , Cb 2 , Cb 3 , Cb 4  shown in FIG. 5 are displayed. For laser, the 3-dimensional posture drawings CL 1 , CL 2 , CL 3 , CL 4  shown in FIG. 7 are displayed. Further, for punching, the 3-dimensional posture drawings Cp 1 , Cp 2 , Cp 3 , Cp 4  shown in FIG. 8 are displayed. 
     After the aforementioned machining schedule Hi and 3-dimensional posture drawing Ci are displayed, the schedule selection screen indication instruction portion  31  determines whether or not any machining schedule has been selected(S 26 ). If it; is determined that selection of machining schedule has been carried out at step S 26 , a selected machining schedule Hia is displayed in a state different from other machining schedules(S 27 ). In FIG. 5, machining schedules Hb 3  has been selected. 
     Then, a program name of the selected machining schedule Hia is displayed and then this processing is terminated. 
     If it is determined that selection of the machining schedule has not been performed at step S 26 , it is determined whether or not any 3-dimensional posture drawing has been selected(S 29 ). If it Is determined that selection of the 3-dimensional posture drawing has been carried out at step S 29 , the selected posture drawing is enlarged and displayed(S 30 ) and this processing is terminated. 
     Next, the processing of the icon corresponding program combination portion  32  will be described with reference to a program block diagram shown in FIG.  10 . 
     The icon corresponding program combination portion  32  contains new/repeat determining means  40 , retrieval means  41 , and combination means  42 . 
     The new/repeat determining means  40  reads machining schedules Hi(H 1 , H 2 , H 3 , H 4 , . . . ) in the main memory  27  in order, determines which a product of read machining schedule is new or repeat, and if the product is repeat product, actuates the retrieval means  41  so as to notify its product name(NC program name). 
     If the product is new, the combination means  42  is started so as to notify the storage address of read machining schedule. 
     The retrieval means  41 , when notified of a name of that repeat product, retrieves program information pi of processing information corresponding to this product from the file  35  and store it with correspondence to icon information ai of the file  36 . 
     For the bending machine, the program information pi of this processing information contains bending order, dies, simulation picture data and the like. 
     When the system is turned on, the combination means  42  reads machining schedule Hi from the main memory  27 , and according to predetermined combination conditions in the file  34 , and stores the icon parameter ai and program information pi corresponding to that icon parameter ai with correspondence therebetween. 
     Further, the combination means  42  reads the machining schedule Hi of a product determined to be new and stores program information (information input screen in step) image in the file  36  with correspondence to the icon parameter ai. 
     When a 3-dimensional posture drawing Ci is pressed at step S 30  and that drawing is displayed in enlargement, as shown in FIG. 11, the schedule selection screen indication instruction portion  31  automatically rotates it for several minutes so that its overall posture can be seen. 
     The above described configuration is applied to the NC apparatus for bending machine, laser and punching press. An example of a case when an icon other than the schedule icon A 1  is selected will be described below. 
     &lt;NC apparatus for bending machine&gt; 
     For example when the schedule selection screen shown in FIG. 5 is displayed, if the bending order/dies instruction icon Ab 2  is pressed manually, the icon corresponding program screen instruction portion  33  finds a program of information setting screen for bending order instruction, which is a program information pi corresponding to this icon and notifies the program administrator  25  of this program. 
     The program administrator  25  displays a program screen of the program for bending order instruction from the main memory  27 . 
     This bending order instruction program displays a control parameter setting screen B 1  of a specified product (NC program name), an exploded drawing screen B 2 , and simulation screens B 3 , B 4 , for example as shown in FIG.  12 . 
     The information setting screen for bending order instruction shown in FIG. 12 shows the sixth step of seven steps. That is, the bending order instruction program first determines how many steps are required to complete bending of a product of a specified NC program, so that the bending information setting screens can be displayed in order from the initial step to the final step. Changing of the bending step can be performed by pressing the step B 11  on the screen. 
     In the exploded view screen B 2 , as shown in FIG. 12, lines traded with the finger are indicated by green and numbers indicating an order of that trace are attached near the lines in green so as to indicate the order of bending. 
     Further, a next bending position is indicated in red line and a side to be butted against an indicator is indicated by two arrows. Further, the bending process simulation image B 4  and after-bending simulation image B 3  are displayed. 
     Next, if the dies selection button is pressed on the screen shown in FIG. 12, the bending order/dies instruction program displays the information setting screen for dies selection shown in FIG.  13 . 
     On the screen of FIG. 13, screen B 15  containing a sectional view of a typical punch for bending a product and a sectional view of die, dies selection information screen B 16 , sectional view group B 17  of dies similar to the sectional view of the die displayed on the left side of this screen, and sectional view group B 18  of the punches are displayed. That is, dies type can be set for each bending. 
     When the dies information setting is completed in FIG. 13, the bending order/dies instruction program actuates dies disposition program and displays information setting screen for dies disposition shown in FIG.  14 . 
     In FIG. 14, setup process B 20  for dies disposition, a sectional view B 21  of the dies selected on the screen of FIG. 13, dies information screen B 22  about punch, holder, die and the like, dies disposition simulation screen B 23  and the like are displayed. 
     In this dies disposition simulation screen B 23 , selected dies(punch, die) and workpiece can be disposed freely. Specifically, by swaying a vertical line B 23   a  which represents machine center( 0 ) to the right and left by touching with a finger to drag it, all the punches B 23   c  and dies B 23   b  are spontaneously moved in a similar manner in conformity with the movement of the vertical line B 23   a . Further, by touching a curtain die, for example, with a finger, a vertical line B 23   d  appears along the left edge of the certain die. Then by Swaying a vertical line B 23   d  to the right and left by touching with a finger to drag it, only the certain die is moved. 
     Further more, a workpiece B 23   e  is also displayed on the screen. As shown in FIG. 14, in such a case that the length of a bending line and the length of the dies are different, the, workpiece can be moved to any position by touching with a finger to drag it so that it may be bent by any part of the dies. In addition, according to the movement of the workpiece, inner data relating to a position of the corresponding backgage are automatically changed. 
     Of course, dies and a workpiece can be also moved not by a finger but by a mouse device. 
     If bending order, dies selection and dies disposition are terminated, the simulation screen shown in FIG. 15 can be displayed. 
     On the bending simulation screen shown in FIG. 15, continuous simulation of bending procedure and frame feeding can be carried out by a scroll button (not shown). Further, critical positions can be enlarged by an enlargement button (not shown). Further, it Is possible to check for any interference from the rear side of a die by using rotation function. 
     Next, the setup procedure which is actuated when the setup icon is pressed will be described. When the setup icon is pressed, the icon corresponding program screen instruction portion  33  finds a program of information setting screen for the setup procedure indicated by program information pi corresponding to this Icon and notifies the program administrator  25  of that program. 
     The program administrator  25  displays a program screen of the setup procedure stored in the main memory  27 . 
     On this setup procedure information setting screen, as shown in FIG. 16, home position return setting screen B 25  for executing home position return, dies layout screen B 26  indicating the overall layout of the dies, dies detailed information screen B 27  and the like are displayed. Then, when a punch or die on the dies layout screen B 26  is touched, a sectional shape of that punch or die is displayed. 
     On the dies detailed information screen B 27 , information about punch No., angle, end radius and the like is displayed and on the right side, a screen for indicating a length of the pressed punch is displayed. Thus, by reading these information, it is possible to see where and what dies should be placed. 
     Next, the machining procedure which is actuated when the machining icon is pressed will be described. When the machining icon is pressed, the icon corresponding program screen instruction portion  33  shown in FIG. 2 finds a program of the information setting screen for machining procedure indicted by program information pi corresponding to this icons and notifies the program administrator  25  of that program. 
     The program administrator  25  displays a program screen of the machining procedure stored in the main memory  27 . 
     On the information setting screen of this machining procedure, as shown in FIG. 17, bending simulation screen B 28 , bending data screen B 29  of bending data necessary for the simulation on the bending simulation screen B 28 , and the like are displayed. 
     That is, the bending simulation screen B 28  enables to simulate based on bending data and correct bending data by checking bending condition of that time. As for this bending data, L 1  indicates right butting longitudinal position, L 2  indicates left butting longitudinal position, D 1  indicates right axis D value, D 2  indicates left axis D value, CC indicates pressure ratio, YL indicates left butting lateral position, YR indicates right butting lateral position, and Z indicates butting vertical position. 
     Thus, for a new product, it is possible to search for an appropriate angle by a correcting dial while checking the simulation screen B 28 . 
     Next, inspection procedure which is actuated when the inspection icon is pressed will be described below. When the inspection Icon is pressed, the icon corresponding program screen instruction portion  33  of FIG. 2 finds a program of the information setting screen for inspection procedure indicated by program information pi corresponding to this icon and notifies the program administrator  25  of that program. 
     The program administrator  25  displays a program screen of the inspection procedure stored in the main memory  27 . 
     The information setting screen for the inspection procedure, as shown in FIG. 18, contains 3-dimensional posture drawing screen B 30  for inputting an inspection point, determination screen B 31  for indicating a result of determination of an inspection value, inspection item result screen B 33  and the like. 
     Further, screen B 34  which is an enlargement of the 3-dimensional posture drawing screen B 30  is displayed. This information setting screen includes a function for displaying a result of measurement of each point using network calipers. 
     Next, the achievement registration procedure which is actuated when the achievement icon is pressed or inspection procedure is terminated will be described below. When the achievement icon is pressed, the Icon corresponding program screen instruction portion  33  shown in FIG. 2 finds a program of the information setting screen for achievement registration indicated by program information pi corresponding to this icon and notifies the program administrator  25  of that program. 
     The program administrator  25  displays the program screen for the achievement registration stored in the main memory  27 . 
     As shown in FIG. 19, the achievement registration procedure screen indicates machining time, setup time, total working time, actual machining amount and the like. 
     That is, working time, machining time and the like of each screen for each step after a workpiece of a machining schedule is selected are accumulated and displayed, and the number of products made in actual machining is automatically counted. Then, these data are sent to the parent station and registered therein. 
     &lt;Example of laser&gt; 
     An example in which the present invention is applied to NC apparatus for laser machine will be described. In this description, the machining condition icon will be mentioned. That is, a program described later is stored in the main memory with correspondence to the machining condition icon. 
     When the machining, icon is pressed, the processing condition information program displays processing condition setting screen shown In FIG.  20 . This screen displays material information setting screen for material name, material information, property and the like and laser information screen containing laser machining condition corresponding to E code, and the like. 
     &lt;Punching&gt; 
     An example in which the present invention is applied to the NC apparatus for punching machine will be described. In this description, the dies icon will be mentioned. That is, a program described later is stored in the main memory with correspondence to the dies icon. 
     When the dies icon is pressed, the dies information program displays available dies list screen shown in FIG.  21 . Further, a function for changing this screen to turret screen is also provided. 
     The turret screen of FIG. 21 indicates a mounted punch or die, inserted punch or die, replacement punch or die, a punch or die to be removed and currently used punch or die in each different color. 
     As described above, according to the present invention, the icon group in which the icons are arranged in the order of processing steps is displayed, and when any icon is selected, an information setting screen corresponding to this icon is displayed and receives an input. 
     Therefore, even inexperienced operator knows what to do next through a displayed screen easily and further can input and set almost all informations for each mode through that single screen of each step. 
     It should be understood that many modifications and adaptations of the invention will become apparent to those skilled in the art and it is intended to encompass such obvious modifications and changes in the scope of the claims appended hereto.