Abstract:
A hands-free quick-change air tool configuration for a machining apparatus includes a tool holder configured to receive a normally hand-held air operated tool. The air manifold is operably receptive of the tool holder. A plunger-type seal configuration is operably interconnected to an air supply and is in operable communication with the air manifold. A method for deburring a part in a machining apparatus is included.

Description:
BACKGROUND 
       [0001]    Machine tools and particularly those having the possibility of performing multiple operations are ubiquitous in industry. Such tools as turret lathes have become an important tool for any machine shop to have and operate. While the tools certainly help production throughput, they often require tool changes and non-tool-change related operator intervention throughout a machining operation. Some operational changes can be effected through control systems located externally of the machine and some require an operator to access the interior of the machine. Accessing the interior of the machine can be messy due to coolants used and can potentially be dangerous if the operator fails to employ proper protocols. 
         [0002]    In view of the foregoing, configurations that reduce operator intervention requirements are always welcomed by the art. 
       SUMMARY 
       [0003]    A hands-free quick-change air tool configuration for a machining apparatus includes a tool holder configured to receive a normally hand-held air operated tool; an air manifold operably receptive of the tool holder; and a plunger-type seal configuration operably interconnected to an air supply and in operable communication with the air manifold. 
         [0004]    A method for deburring a part in a machining apparatus includes installing the configuration as claims in claims  1  in a machining apparatus; inputting instructions to a control unit to cause the air tool to be aligned with the part; and inputting instructions to activate a solenoid associated with supplying air from an air source to the air manifold. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0005]    Referring now to the drawings wherein like elements are numbered alike in the several Figures: 
           [0006]      FIG. 1  is a representation of one embodiment wherein a standard hand-held air tool is mounted in a tool holder to a machining apparatus that is plumbed to provide air as a power fluid to the air tool; 
           [0007]      FIG. 2  is a view of the turret depicted in  FIG. 1  from a reverse vantage point illustrating the air/coolant plumbing configuration; 
           [0008]      FIG. 3  is a view of the tool holder and air tool depicted in  FIG. 1 ; and 
           [0009]      FIG. 4  is a view of an air connector configured for reception in the air tool and an air manifold. 
       
    
    
     DETAILED DESCRIPTION 
       [0010]    The invention described herein succeeds at both of reducing the need for operator intervention in machining operations by providing remotely actuatable air driven tool capability within the machine and reducing costs of adding tools having alternate capabilities than standard tools for such a machine by advantageously facilitating the use of normally hand-held air driven tools in the machine. 
         [0011]    Referring to  FIG. 1 , the reader&#39;s attention is directed to air tool  10 , which is depicted in this embodiment as an air grinder. The air tool may be recognized by some as a standard type of air tool normally used in a hand-held paradigm. Tools like the depicted air tool  10  are ubiquitously available and inexpensive to purchase. They are powered by compressed air often referred to as “shop air”, which is readily available in most machine shops for various purposes. In ordinary use, an operator will use a quick connect coupling (available everywhere in connection with air tools) to connect to and supply air to an air powered tool and then use that tool by hand to effect a result as desired. 
         [0012]    In connection with this disclosure however, the air tool  10  is mounted in a tool holder  12  configured to be connected to an air manifold  14 . The air manifold  14  is connected in a conventional way to a mounting location in a machining apparatus such as to a turret  16  of a turret lathe  18 , as shown. The air tool  10  is secured in the tool holder  12  in an “on” position. As one familiar with the use of air tools will recognize, each tool has a configuration allowing an operator to operate the tool. In the case of an air grinder like that illustrated, the “switch” is commonly a paddle-type switch. In one embodiment of the invention, the tool holder  12  is configured to hold the paddle-type switch in the depressed position. In this position, a supply of pressurized air to the air tool in the tool holder will automatically cause the air tool to operate. In one embodiment, the tool holder  12  is configured as two pieces. A body  20  cooperates with a cap  22  to mount and hold the air tool  10  therein. As illustrated the body and cap are secured to one another using a number of fasteners. 
         [0013]    Air tools and other air driven accessories will also have an air inlet. The air inlet is very well known and hence does not require illustration. Suffice to say that it is in many cases at a base of the air tool and is so with the air tool depicted in  FIGS. 1 and 3  hereof. In order to provide quick and easy air connection, an NPT (national pipe tapered) connection (see  FIG. 4 ) is provided for threaded connection to the air tool  10  and mounted connection to the air manifold  14 . 
         [0014]    Referring to  FIG. 2  a part of the air manifold  14  is visible, the view being from behind the turret  16  shown in  FIG. 1 . This portion of the air manifold is referred to herein for convenience as plumbing  30 . Plumbing  30  includes an air inlet  32  and a liquid inlet  34  that both feed a switchable fluid port  36 . Switchable fluid port  36  is connected to a fluid conduit  38  that feeds the air tool  10 . The port  36  is switchable to feed air or coolant depending upon what tool is connected to the turret  16 . If a conventional tool is connected to the turret  16  in the relevant position, a coolant supply would be desirable whereas if an air powered tool is connected in that position as illustrated in  FIG. 1 , air would be provided to the tool  10 . 
         [0015]    In order to feed pressurized air to the plumbing  30 , a plunger-type fluid sealing arrangement  40  is employed (see  FIG. 2 ). This is similar to those commercially available to convey cooling fluid to a turret  16  but in connection with the disclosure hereof is used for air conveyance, a fluid not normally conveyed to a turret  16 . When the turret moves to a locked position after rotation, the plunger type fluid sealing arrangement  40  will be in compressed engagement with a seal port  42 , commonly both made of polytetrafluoroethylene or other relatively hard, long wearing yet deformable material. When the components  40  and  42  are pressed together by the turret moving to the locked position, the connection between  40  and  42  is capable of conveying pressurized fluid, in this case air or other compressed gas that is capable of powering an air type tool. 
         [0016]    The configuration allows for pressurized air to be available within the machine via solenoid actuation and for an air powered tool to be mounted and operated within the machine without an operator even opening the door to the machine. Thereby, the operator is protected from his or her own failure to follow safety protocols and overall safety is thus enhanced through the employment of the configuration as disclosed. 
         [0017]    In a particular embodiment of the invention disclosed herein a deburring function is enabled by the configuration disclosed. Conventionally deburring of a machined part would be effected by an operator opening a machine door and reaching in with a deburring tool to debur the part while the machine rotated the part being machined. Made possible by the configuration disclosed herein however, the air tool is tipped with a bit  48  capable of deburring the part being machined. To accomplish the deburring operation, the operator merely programs the machine to rotate the turret  16  to align the tool  10  with the part and activate the pressurized air flow. The air tool will then debur the part without the door of the machine being opened by the operator and the operator need not reach into the machine at all. 
         [0018]    It is to be appreciated that not only does the invention increase operator safety and improve efficiency in machining; it also enables the use of inexpensive air tools in place of very expensive alternatives. The industry is thus benefited in efficiency, cost and safety. 
         [0019]    While one or more embodiments have been shown and described, modifications and substitutions may be made thereto without departing from the spirit and scope of the invention. Accordingly, it is to be understood that the present invention has been described by way of illustrations and not limitation.