JP2880215B2 - Processing machine with work loading / unloading setting device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a processing machine with a work carrying-in / out setting device for carrying out and setting a pallet on which a work is placed to and from a processing part.

[Conventional technology]

Generally, in a wire electric discharge machine, a portion running in a vertical direction of a wire electrode is used, a discharge is generated between the work and the wire electrode, and the work is machined by discharge energy. The wire electrode is guided by various rollers such as a tension roller and a brake roller in an automatic wire feeder, and is supplied with an appropriate tension to a wire head having a wire guide.

On the other hand, the XY table with the workpiece
It moves in the X and Y directions according to the processing condition of the workpiece according to the command from the device, the movements of both are combined, and the processing proceeds with the wire electrode supplied to the wire head. The XY table repeats servo guidance, and the workpiece is subjected to electric discharge machining into a predetermined machining shape by the relative movement of the two.

Recently, regarding wire electric discharge machines, machining such as machining of large workpieces, progressive feeding machining, and unmanned machining by automation has been increasing. When such wire electric discharge machining is performed automatically, a wire electrode exchanging device for automatically exchanging a wire electrode when there is no running wire electrode performing the electric discharge machining is provided.

For example, JP-A-63-139616 discloses a wire electrode exchange device. An automatic wire feeding method of a wire electric discharge machine is disclosed in, for example, Japanese Patent Application No. 63-298396 (Japanese Patent Application Laid-Open No. 2-145215) filed by the present applicant. Further, a wire electric discharge machine for automatically removing a core from a workpiece is disclosed, for example, in Japanese Patent Application No. 1-98878 (Japanese Unexamined Patent Application Publication No. 2-279216) filed by the present applicant.
No. 1).

[Problems to be solved by the invention]

However, there is no conventional wire electric discharge machine which automatically sets and fixes a workpiece on a jig base on an XY table of the wire electric discharge machine. It has become. Therefore, the work carried into the wire electric discharge machine is automatically set and fixed, whereby the wire electric discharge machine is configured as a fully automatic device, and the work is discharged unattended to the work regardless of day and night. It is desired to perform processing continuously.

[Means for solving the problem]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-described problem, and a pallet in which a workpiece is set at a predetermined position is mounted on a table of a machining machine such as a wire electric discharge machine by a pallet changer or the like. The pallet is loaded, the pallet is set as a reference on the worktable, and is automatically set and fixed at a predetermined position by a pallet retraction / extrusion device and a clamp device. And to improve the reliability of setting accuracy,
Improving the machining accuracy of the workpiece, after machining the workpiece, automatically unloads the pallet on which the workpiece has been set from the worktable to the pallet changer side, and repeats the above steps to load, set, An object of the present invention is to provide a working machine with a work carrying-in / out setting device capable of automatically and continuously performing each process of working and unloading.

According to the present invention, there is provided a processing table provided with a reference means mounted on a table, a processing tank cover device provided on a processing tank mounted on the table and provided with a slide cover capable of opening and closing an entrance. A pallet set in advance at a position, a pallet unloading-side supporting portion provided in parallel with a pallet changer adjacent to the processing table, and a pallet for loading and unloading between the pallet loading-side supporting portion and the processing table. And a pallet retraction and extrusion device provided on the pallet changer, and a clamp device for fixing the pallet carried into the processing table to a processing reference portion, wherein the pallet is provided with the processing device. A reference means that is set at a predetermined position on the table and matches the reference means of the processing table;
The clamping device relates to a processing machine with a workpiece loading / unloading setting device, comprising: a connection bar provided on the processing table and provided with a clamp; and an actuator for moving the connection bar up and down.

The pallet is provided with a cutout hole wider than a processing area at a central portion for running a wire electrode, and a predetermined position from the reference means for setting the workpiece at a predetermined position on the pallet and outside the processing area. Have a number of reference holes.

The actuator provided in the clamp device presses the reference means of the pallet against the reference means of the worktable by a command of a controller to move the connection bar up and down while the pallet is stationary at a predetermined position. It is.

The processing machine with a work carrying-in / out setting device is provided with a reference surface cleaning device for cleaning a reference surface of the reference device of the processing table and a reference surface of the reference device of the pallet.

[Action]

The processing machine with a work loading / unloading setting device according to the present invention is:
The configuration described above operates as follows. That is, in this processing machine with a work loading / unloading setting device, a processing table provided with processing reference means is arranged on a table, and a work is set at a predetermined position on a pallet provided with processing reference means. In other words, by simply fixing the pallet carried on the worktable to a processing reference position with a pallet retraction / extrusion device and a clamp device, the work piece can be accurately and reliably set at the processing position of the processing machine. Can be.
Therefore, if the pallet is carried in and out of the worktable using a pallet changer or the like, the work can be automatically and reliably moved to the predetermined position on the worktable from the pallet changer side. In addition, the pallet can be automatically unloaded from the worktable to the pallet changer after the workpiece is machined.

In addition, if the pallet is retracted and extruded from the worktable by the pallet retraction and extrusion device, and the clamping device is operated in conjunction with the pallet retraction and extrusion device, the pallet can be moved to the worktable. Can be set with a high degree of accuracy.

〔Example〕

Hereinafter, an embodiment of a working machine with a work carrying-in / out setting device according to the present invention will be described with reference to the drawings. Fig. 1 and 2
With reference to FIGS. 3, 3 and 4, an outline of an embodiment of a processing machine with a work carrying-in / out setting device according to the present invention will be described. FIG. 1 is a schematic plan view showing one embodiment of a processing machine with a work carrying-in / out setting device, FIG. 2 is a schematic side view of FIG. 1, and FIG. 3 excludes the head of the processing machine of FIG. FIG. 4 is a schematic side view of FIG. 3, and FIG.

In this embodiment, the machining machine is applied to the wire electric discharge machine 1. However, the machining machine is not limited to the wire electric discharge machine, but can be applied to other machining machines for machining a workpiece. Alternatively, it can be used not only to prevent scattering of machining fluid, machining waste, etc., but also as a guard for safety.
In addition, the workpiece here refers to not only a workpiece but also a workpiece that has been processed, and can perform assembling, final finishing, and the like.

The pallet carrying-in / out device 2 mainly includes a pallet retraction / extruding device 11 and a clamping device 7 provided in the wire electric discharge machine 1, and a pallet changer 12 installed in front of the wire electric discharge machine 1. The wire electric discharge machine 1 can be provided with an automatic wire electrode supply device 3, a wire electrode exchanging device, a device for automatically removing a core from a workpiece, and the like, similarly to the conventional one. In the wire electric discharge machine 1, the wire electrode 9 is guided by various rollers such as a tension roller and a brake roller in the automatic wire electrode supply device 3 and is given an appropriate tension. Supplied to the wire head.

On the other hand, the workpiece W is set in advance on each pallet 10, and the pallet 10 is moved by the pallet loading / unloading device 2 onto a processing table 17 fixed to a jig base 4A mounted on the XY table 4 in an electrically insulated state. It is installed automatically. Therefore, after setting the pallet 10 on the worktable 17,
A discharge is generated between the workpiece W fixed on the wire 10 and the wire electrode 9, and the workpiece W is processed by the discharge energy.

The XY table 4 moves in the X direction and the Y direction according to the processing state of the workpiece W according to a command from the NC device, and the movements of the two move together to form the XY table 4 with the wire electrode 9 supplied to the wire head. Processing proceeds, and during processing, the wire electrodes 9 and X
The -Y table 4 repeats servo movement, and the workpiece W is subjected to electric discharge machining into a predetermined machining shape by the relative movement of both.

The processing machine with the work loading / unloading setting device includes a clamping device 7 provided on a processing table 17 fixed to a jig base 4A on the XY table 4 and a pallet 10 when the pallet 10 is loaded / unloaded. A pallet retraction / extrusion device 11 provided on the processing table 17 for drawing in or extruding from the processing table 17 is provided.

For each of the above parts, in particular, FIG. 5, FIG. 6 and FIG.
An overall description will be given with reference to the drawings. FIG. 5 is a plan view showing various parts mounted on the XY table in the processing machine, FIG. 6 is a front view showing various parts mounted on the XY table in the processing machine, and FIG. It is a side view of a figure.

A jig base 4A is fixed on the XY table 4 of the wire electric discharge machine 1 in an electrically interrupted state, a machining tank 8A is attached to the jig base 4A, and the machining fluid is scattered in the machining tank 8A. A work tank carver device 8 with a slide cover 5 that can be opened and closed for prevention is provided. On the upper surface of the jig base 4A, a pair of processing tables 17 serving as position reference means is fixed. The processing table 17 is located on both sides of the jig base 4A,
The clamping device 7 and the pallet retraction / extrusion device 11 are fixed.

The processing table 17 extends in the moving direction of the pallet 10 and is fixed on a jig base 4A on the XY table 4 so as to support both ends of the pallet 10. Processing table 17
The XY table 4 is fixed to a jig base 4A on the XY table 4 and is configured to move with the horizontal movement of the XY table 4 that is servo-moved by the NC device. The positional relationship with respect to the road is determined in advance.

The connecting bar 14 attached to the processing table 17 has a pallet
In order to guide the pallet 10, a number of guide rollers 21 are provided facing both sides of the pallet 10. Guide roller 21
Functions to smoothly move the pallet 10 with respect to the processing table 17. A positioning member 57 is set at the upper end of the processing table 17. On the upper part of the positioning member 57, a number of guide balls are arranged in the moving direction of the pallet 10.
58 (five on each side in FIG. 5) are rotatably arranged.

The guide ball 58 is, as shown in FIG.
During the movement of the loading and unloading, the spring 62 is urged upward so as to protrude from the upper surface 63 of the positioning member 57. FIG. 8 shows a state where the pallet 10 is fixed on the worktable 17 by the operation of the clamp device 7 by a two-dot chain line, but the ball 58 is in a state before being pushed down through the pallet 10. , The state of being projected by the spring 62 is shown by a solid line. In FIG. 9, the pallet 10 is
The fixed state is shown above, and the ball 58 is pressed down through the pallet 10.

Therefore, when the pallet 10 is carried into the processing table 17 from the pallet table 29 and when the pallet 10 is carried out from the processing table 17 to the pallet table 29, the guide ball 58 projects from the upper surface 63 of the positioning member 57 by the spring force of the spring 62. It acts to move 10 smoothly. When the pallet 10 is set on the processing table 17 and fixed by the clamp device 7, the guide ball 58 is pushed in against the spring force of the spring 62, and the reference surface 56 on the lower surface of the pallet 10 is positioned by the positioning member 57. Reference plane
By contacting the pallet 63, the pallet 10 is accurately and reliably positioned in the predetermined height direction with respect to the processing table 17.

In particular, the clamping device 7 is shown in FIG. 6, FIG. 10, FIG.
This is shown in FIG. 14, FIG. 15 and FIG. FIG. 10 is a plan view showing a state where the pallet is fixed on the processing table, FIG. 12 is a schematic perspective view showing the clamping device, FIG. 14 is a cross-sectional view showing a state where the pallet is fixed to the processing table by the clamping device, FIG. 15 is a sectional side view of FIG. 14, and FIG. 16 is a sectional view showing an air cylinder of the clamp device.

The clamping device 7 is provided with a bracket 6 on the side of each processing table 17.
The pallet 10 is mounted on the processing table 17 at positions opposed to both side surfaces of the pallet 10 via the four and 66, respectively. The clamping device 7 is a connecting bar
14, a pair of clamps 15, arranged at both ends of the connecting bar 14,
And an air cylinder 16 arranged at the center of the connecting bar 14. The clamping device 7 has an air cylinder
A pallet fixing sensor 16A and a pallet release sensor 16B for detecting that the pallet 10 is fixed or released on the processing table 17 by the operation of the pallet 10 are provided.

As shown in FIGS. 14 and 15, a support rod 65 is slidably attached to a bracket 64 fixed to the processing table 17 via a bush 67. A through-hole formed in the connecting bar 14 penetrates the upper portion of the support rod 65, and the connecting bar 14
A clamp 15 is arranged on the upper surface of the support rod 65, and the clamp 15 is screwed into a screw portion provided at the upper end of the support rod 65 and fixed. Further, the clamp 15 is fixed to the connecting bar 14 by a bolt 68.

The air cylinder 16 for moving the connecting bar 14 up and down is provided with a bracket 66 as shown in FIGS.
Is fixed to the processing table 17. Piston rod 70 fixed to piston 69 that reciprocates in air cylinder 16
The upper end of the piston rod 70
The connection bar 14 is fixed to the piston rod 70 by screwing a nut 71 into a threaded portion formed at the tip of the piston.

Therefore, when air is introduced into the air cylinder 16 through the air passage 101, the piston 69 moves downward and the piston rod 70 moves downward. Therefore, the connecting bar 14 fixed to the piston rod 70 moves downward. To move the connecting bar 14 downward, the clamps 15 fixed to both ends of the connecting bar 14 are moved downward, and the pallet 10 is pressed onto the processing table 17 to fix the pallet 10 to the processing table 17.

In this processing machine with a work carrying-in / out setting device, the pallet 10 is particularly shown in FIG. 10 and FIG. No.
FIG. 11 is a schematic perspective view for explaining a pallet.

The pallet 10 is for setting various workpieces W at predetermined positions in advance, and is preferably made of a rust-proof material such as stainless steel. It has a cutout hole 19 in the center that is wider than the processing area. On the end face 22 of the pallet 1 on the side facing the wire electric discharge machine 1, the wire electric discharge machine 1
As the processing reference positioning means provided in the above, a concave reference surface 20 as the reference means matching the positioning stopper 23 having the convex reference surface 81 and a flat reference surface 82 as the reference means matching the flat positioning stopper 24 are provided. Is formed.
The positioning stoppers 23 and 24 are preferably made of a rust-resistant material such as ceramics and cemented carbide and have a high abrasion resistance. The positioning stoppers 23 and 24 are replaceably attached to the processing table 17.

In addition, a reference surface 56 (see FIGS. 8 and 9) is formed on the lower surface of the pallet 10 in order to set the vertical position of the pallet 10 with respect to the processing table 17. Workpiece W
A number of reference holes 98 are formed at a predetermined position from the reference surface 20 and outside the machining area of the wire electric discharge machine 1 in order to set the reference position on the pallet 10. That is, the work W is placed on the pallet 10 according to the size and shape of the work.
The workpiece W is fixed to the pallet 10 through fixing means such as bolts in a plurality of reference holes 98.

Therefore, if the reference hole 98 for fixing the workpiece W is determined in advance according to the type of the workpiece W, the position of the workpiece W from the positioning stoppers 23 and 24 serving as the reference of the worktable 17 can be set. Can be accurately achieved. In FIG. 10, the cases of the four workpieces W are indicated by chain lines. In some cases, the workpiece W can be set by pressing the workpiece W against the reference block 105. Accordingly, the workpiece W can be machined into a predetermined machining shape only by bringing the reference surfaces 20, 82 of the pallet 10 into contact with and fixing the positioning stoppers 23, 24 of the machining table 17.

The pallet 10 is fixed to the machining table 17 of the wire electric discharge machine 1 by a plurality of clamps 15 of the clamp device 7, and has pallets 99 on both sides pressed by the clamps 15. Further, in order to press the reference surface 20 of the pallet 10 against the positioning stoppers 23 and 24 provided on the processing table 17, the piston rod of the air cylinder 26 of the pallet retraction and extrusion device 11 provided on the processing table 17 is provided on the lower surface of the pallet 10. A locking hole 25 for locking a locking member 27 provided at the end is formed.

The pallet retraction / extrusion device 11 converts the pallet 10 into a processing table.
It has the function of pushing or pushing it into place at 17 and is shown in particular in FIGS. 11 and 13. FIG. 13 is a sectional view showing a pallet retraction and extrusion device.

Pallet retraction and extrusion device 11
An air cylinder 26 is provided on the processing table 17 to press the 20 against the positioning stoppers 23 and 24 provided on the processing table 17. The air cylinder 26 is a double-acting cylinder. Air chambers 54 and 55 are formed on both sides of a piston 43 that reciprocates in the air cylinder 26, and air passages 47 and 55 are formed in the air chambers 54 and 55 on either side. The introduction of air through 48 causes the piston 43 to reciprocate in the air cylinder 26.

Furthermore, for the air cylinder 26, a retraction sensor such as a reed switch that detects the limit point of reciprocation of the piston 43
26A and an extrusion sensor 26B are provided. For example, the piston is moved to the part where the retraction sensor 26A and the extrusion sensor 26B are installed.
When 43 moves, the retracting sensor 26A and the pushing sensor 26B detect the position of the piston 43, input the detection signal to the controller, and the controller issues a command to the next operation process. Have been.

In the pallet retraction and pushing device 11, a locking member 27 is provided at an end of the piston rod 42 fixed to the piston 43, and the locking member 27 is engaged with a locking hole 25 formed on the lower surface of the pallet 10. It is configured to be removable. That is, the end of the air cylinder 26 opposite to the piston rod 42 is
A pivot point 44 composed of a pin or the like is attached to a bracket 45 attached to 17.
It is pivoted at. Further, a bracket 49 is attached to an end on the side where the piston rod 42 extends. A piston rod 51 extending from an air cylinder 50 attached to the processing table 17 is pivotally attached to the bracket 49. Accordingly, the air cylinder 26 is supported at one end by the bracket 45 and at the other end by the air cylinder 50 via the bracket 49.
Supported by

The air cylinder 50 is attached to the processing table 17 via a bracket 61, as shown in FIG. 8 or FIG. Therefore, by the operation of the air cylinder 50, the air cylinder 26 can swing up and down about the pivot point 44, whereby the piston rod of the air cylinder 26
The locking member 27 attached to the end of the pallet 42 can be disengaged from the locking hole 25 formed in the pallet 10.

In the pallet retraction and extrusion device 11, the extrusion sensor 26
When B detects the piston 43, the air cylinder 50 is operated to control the locking member 27 to be disengaged from the locking hole 25, and when the retraction sensor 26A detects the piston 43, the air cylinder 26 is detected.
The pallet 10 can be accurately and reliably set on the worktable 17 by controlling the clamp device 7 to operate while maintaining the operable state. Further, the pallet retraction / extrusion device 11 includes a pallet engagement sensor 50A and a pallet engagement sensor 50A for detecting an engagement state or a disengagement state between the locking hole 25 of the pallet 10 and the locking member 27 of the pallet retraction / extrusion device 11. A separation sensor 50B is provided.

The processing tank cover device 8 is shown in FIG. 17 and FIG. FIG. 17 is a perspective view illustrating a main part of the processing tank cover device, and FIG. 18 is a cross-sectional view illustrating a main part of the processing tank cover device.

The machining tank cover device 8 is an X-Y of the wire electric discharge machine 1.
It is arranged in the machining tank 8A attached to the jig base 4A on the table 4, and when machining the workpiece W by wire electric discharge machining,
This prevents scattering of processing waste and the like, and in some cases, functions as a guard for safety.
The processing tank cover device 8 includes an air cylinder 18, a cover 78 attached to the processing tank 8A, a manual opening / closing cover 79 disposed on the side of the cover 78 and pivotally attached to the cover 78, and slidable with respect to the cover 78. Further, the pallet 10 comprises a slide cover 5 which constitutes a carry-in / out port.

The processing tank cover device 8 includes an air cylinder 18 that is an actuator that slides the slide cover 5 for opening and closing the loading / unloading port. The air cylinder 18 is a return cylinder, and the cylinder is made of a non-magnetic material. A piston 72 made of a magnetic material is disposed in the cylinder of the air cylinder 18.
The air reciprocates in the air cylinder 18 when air is supplied to either side of the piston 72 inside.

The slide cover 5 of the processing tank cover device 8 is located on the surface of the pallet carry-in / out device 2 which faces the pallet carry-in / out moving device 38. The reciprocating mechanism of the slide cover 5 is provided with an air cylinder below the processing tank cover device 8.
18, a piston 72 reciprocating in the air cylinder 18 is disposed, and the reciprocating movement of the piston 72 is achieved by supplying air to one of air passages 77 provided at both ends of the air cylinder 18. You.

A cover guide 75 is fixed to the cover 78, and a guide roller 76 is attached to the cover guide 75. A guide rail 74 is fixed to the slide cover 5, and a guide roller 76 is fitted to the guide rail 74. Further, a bracket 73 is fixed to the lower end of the slide cover 5, and a bracket 80 made of a magnet, that is, a magnetic material is fixed to an end of the bracket 73.

The bracket 80 adsorbs a magnetic material piston 72 that reciprocates in the air cylinder 18. Therefore, the piston
When the 72 reciprocates in the cylinder, the bracket 80 holding the piston 72 moves according to the movement of the piston 72. When the bracket 80 reciprocates, the bracket 73 to which the bracket 80 is fixed reciprocates. When the bracket 73 is reciprocated, the slide cover 5 to which the bracket 73 is fixed is guided by a guide roller 76 provided on the cover guide 75 and reciprocates.

In order to detect the open / closed state of the slide cover 5, the processing tank cover device 8 includes an open end sensor 18A for detecting the open state of the slide cover 5 and a closed end sensor 18B for detecting the closed state of the slide cover 5. Open end sensor 1
8A and the closed end sensor 18B can be provided for the cover 78, the slide cover 5, or the air cylinder 18 as shown. The controller detects that the slide cover 5 is in an open state by the open end sensor 18A, and the controller receives the detection signal, and the pallet located on the pallet table 29.
Control to move the pallet 10 on the machining table 17 provided on the XY table 4 of the wire electric discharge machine 1 or control to move the pallet 10 on the machining table 17 from the machining table 17 to the pallet table 29 I do. In addition, the closed state of the slide cover 5 is detected by the closed end sensor 18B, and the controller receives the detection signal and controls the wire electric discharge machine 1 to operate.

Various embodiments of a mechanism for positioning the pallet 10 at a predetermined horizontal position on the machining table 17 in the wire electric discharge machine 1 will be described with reference to FIGS. 19 to 24. In the drawings, members performing the same function are denoted by the same reference numerals, and redundant description is omitted.

First, in FIG. 19, 90
Concave reference surface 20 cut out in a degree shape, and concave reference surface 20
A flat reference surface 82 is formed in a portion different from the above. Further, the worktable 17 of the wire electric discharge machine 1 has a positioning stopper 23 having a 90-degree protruding convex reference surface 81 to be engaged with the concave reference surface 20 of the pallet 10, and a flat reference surface 82 of the pallet 10. There is provided a positioning stopper 24 having a flat reference surface 83 which abuts against. Therefore, if the pallet 10 is pushed on the machining table 17 of the wire electric discharge machine 1, the concave reference surface 20
And the convex reference surface 81 are engaged, and the flat reference surface 82 and the flat reference surface 83 are in contact with each other. Therefore, pallet 10 is a processing table
It will be positioned at the predetermined position on 17.

Alternatively, the horizontal positioning mechanism of the pallet 10 shown in FIG. 20 has the same structure and function as those shown in FIG. A convex reference surface 84 is formed on the pallet 10 and the positioning stopper 23
Is formed with a concave reference surface 85.

Alternatively, the horizontal positioning mechanism of the pallet 10 shown in FIG. 21 has the same structure and function as those shown in FIG. 19 except that the cylindrical body 86 is fitted to the positioning stopper 23. Things. Concave reference surface 20 of pallet 10
The outer peripheral surface of the cylindrical body 86 that comes into contact with the concave reference surface 20 when the cylindrical body 86 is engaged with the reference surface 87 constitutes the reference surface 87.

Alternatively, the horizontal positioning mechanism of the pallet 10 shown in FIG. 22 has the same structure and function as the one shown in FIG. 21 except that the cylindrical body is provided in reverse.
The cylindrical body 88 is fitted to the end face 22 of the pallet 10. When the cylindrical body 88 is engaged with the concave reference surface 85 formed on the positioning stopper 23, the outer peripheral surface of the cylindrical body 88 that comes into contact with the concave reference surface 85 is the reference surface.
89.

Or, the horizontal positioning mechanism of the pallet 10 shown in Fig. 23 has the same structure and function as the one shown in Fig. 20, except that the positioning member is composed of two cylindrical bodies. It is. Two cylindrical bodies 90 are fixed to the worktable 17 as positioning members in a spaced state. Pallet 10
When the convex reference surface 84 of the pallet 10 is engaged with the cylindrical body 90 by engaging the inserted reference body between the cylindrical bodies 90, the convex reference surface 84 of the pallet 10 is engaged. Cylindrical body 88 abutting 84
Are the reference surfaces 91.

Alternatively, the horizontal positioning mechanism of the pallet 10 shown in FIG. 24 has the same structure and function as the one shown in FIG. 23 except that two cylindrical bodies are provided in reverse. is there. The two-drink cylindrical body 92 is fixed to the pallet 10 in a spaced state. When the convex reference surface 81 of the positioning stopper 23 is engaged between the cylindrical bodies 92 by being fitted between the cylindrical bodies 92, the convex reference surface 81 of the positioning stopper 23 The outer peripheral surface of the cylindrical body 92 abutting on the reference surface 81 forms a reference surface 93.

Further, the processing machine with the work loading / unloading setting device includes a reference surface 63 of a reference member 57 disposed on the processing table 17, a reference surface 56 formed on the back surface of the pallet 10, and a reference surface 20 of the end surface 22 of the pallet 10. , 82, 84, 89, and positioning stoppers provided on the worktable 17
A reference surface cleaning device is provided to clean the reference surfaces 81, 83, 85, 87, 91 formed on 23, 24. The reference surface cleaning device can be composed of a water spray nozzle for spraying water to the cleaning surface and an air spray nozzle for blowing air, and removes fine machining chips generated during wire electric discharge machining by the wire electric discharge machine 1. I do. Therefore, since each reference surface can be always cleaned at every setting of the pallet 10 or at every predetermined period, the setting of the pallet 10 on the processing table 17 is always reliable and does not adversely affect the processing accuracy.

The processing machine with the work loading / unloading setting device is configured as described above. However, the air circuit for operating each air cylinder in the pallet loading / unloading setting device is, for example, a 25th air circuit.
It is configured as shown in the figure. In FIG. 25, reference symbol E is an air circuit diagram for each air cylinder provided on the wire electric discharge machine 1 side, and reference symbol F is an air circuit diagram for each air cylinder provided on the pallet changer 12 side.

For the wire electric discharge machine 1, the compressed air supply source 10
The compressed air is supplied to the respective air cylinders 16, 18, 26, 50 through the air switching valve 52 through the air pressure adjusting device 102. Also, pallet changer 12
On the air side, compressed air is supplied from the compressed air supply source 104 to the respective air cylinders 13, 31, 32, 33 through the air switching valve 53 through the air pressure adjusting device 103. The compressed air is supplied to each of the air cylinders, and the piston in each of the air cylinders reciprocates, whereby the operating state of each of the air cylinders is detected by each of the sensors. The detection signal detected by each sensor is input to a controller, and the controller issues a command in response to each detection signal according to an operation process which is input in advance as a sequence, and controls the wire electric discharge machine 1 and the pallet changer 12. Works,
The pallet 10 is carried in and out of the wire electric discharge machine 1 and is carried in and out of the pallet changer 12.

In the air circuit of the wire electric discharge machine 1, the symbol G
Indicates an air cylinder 18 for operating the slide cover 5 of the processing tank cover device 8, and compressed air is supplied to the air cylinder 18 through an air switching valve 18G, and the operation state of the air cylinder 18 is determined by an open end sensor 18A and a closed state. It is detected by the end sensor 18B.

The reference numeral H indicates each air cylinder 50 for operating each loading / unloading pallet hook or locking member 27 provided on both sides of the processing table 17, and each air cylinder 50 is compressed through an air switching valve 50H. Air is supplied, and the operation state of each air cylinder 50 is detected by a pallet engagement sensor 50A and a pallet detachment sensor 50B.

Reference numeral I indicates each air cylinder 16 for operating each pallet clamp 15 provided on both sides of the processing table 17, and compressed air is supplied to each air cylinder 16 through an air switching valve 16I. Is detected by the pallet fixing sensor 16A and the pallet release sensor 16B.

The reference symbol J indicates each air cylinder 26 for operating each pallet retraction / extruding device 11 provided on both sides of the processing table 17 and required to carry in and out a pallet. Each air cylinder 26 is connected to each air cylinder 26 through an air switching valve 26J. Compressed air is supplied, and the operating state of each air cylinder 26 is detected by a pull-in sensor 26A and a push-out sensor 26B.

〔The invention's effect〕

The processing machine with a work loading / unloading setting device according to the present invention is:
With the above configuration, the work table provided with the processing reference means can be arranged on the table, and the workpiece can be set at a predetermined position on the pallet provided with the processing reference means. For example, the work piece can be accurately and reliably set at a processing portion simply by fixing the pallet carried onto the processing table to a processing reference portion by the pallet retraction / extrusion device and the clamp device. . Therefore, by using a pallet changer or the like, if the slide cover of the work tank cover device, which functions as a safety guard to prevent scattering of the working fluid and processing debris or the like, is opened and the entrance of the workpiece is opened, the work tank is opened. The pallet can be carried in and out of the worktable without the cover device becoming an obstacle, and the workpiece can be automatically and reliably moved from the pallet changer side to a predetermined position on the worktable. Can be set on a regular basis, and after machining the workpiece,
The pallet can be automatically carried out from the processing table to the pallet changer side.

In addition, if the pallet is retracted and extruded from the worktable by the pallet retraction and extrusion device, and the clamping device is operated in conjunction with the pallet retraction and extrusion device, the pallet can be moved to the worktable. Can be set with a high degree of accuracy.

In particular, the clamping device includes a connecting bar provided on the processing table, a clamp provided on the connecting bar, and an actuator for moving the connecting bar up and down. Since the pallet operates while the pallet is stopped at a predetermined position by being pressed against the reference means of the processing table, the pallet is fixed to the processing table with the pallet pressed against the reference member, and the processing position of the workpiece is changed. The work table can be set accurately and reliably, and the workpiece can be processed immediately upon receipt of the pallet fixing signal from the clamping device, without adversely affecting the processing accuracy.

In addition, since the pallet is configured as described above, it can be adapted to various processing shapes of a workpiece immediately and can be set, and the workpiece is accurately and reliably set at a processing portion of the processing machine. And the processing accuracy for the workpiece can be improved.

Further, in order to clean the reference surface of the reference means of the processing table and the reference surface of the reference means of the pallet, a reference surface cleaning device can be provided, and the reference surface of the processing table for setting the pallet, the pallet The reference surface can be cleaned every time the pallet is set or at predetermined intervals, and the pallet can always be accurately and reliably set on the processing table, thereby improving the processing accuracy of the workpiece.

[Brief description of the drawings]

FIG. 1 is a schematic plan view showing an embodiment of a processing machine with a work loading / unloading setting device according to the present invention, FIG. 2 is a schematic side view of FIG. 1, and FIG. 3 is a head of the processing machine in FIG. FIG. 4 is a schematic side view of FIG. 3, FIG. 5 is a plan view showing a pallet mounting portion of the processing machine,
6 is a front view of the processing machine, FIG. 7 is a side view of the processing machine, FIG. 8 is an enlarged front view showing a relationship between a clamping device, a pallet and the like for the processing table, and FIG. FIG. 10 is a cross-sectional view showing the relationship, FIG. 10 is a plan view showing a pallet, a clamping device, and a positioning device in the processing machine with a work carrying-in / out setting device, FIG.
12 is a perspective view showing a clamp device, FIG. 13 is a side view showing a pallet retraction and extrusion device, FIG. 14 is a front view of a partial cross section of the clamp device, and FIG. 16 is a partial cross-sectional side view showing an air cylinder of the clamp device, FIG. 17 is a perspective view showing an example of a processing tank cover device, FIG. 18 is a cross-sectional view of FIG. Fig. 19,
FIG. 20, FIG. 21, FIG. 22, FIG. 23 and FIG. 24 are explanatory views showing various examples of a mechanism for positioning a pallet on a worktable.
And FIG. 25 is an air circuit diagram showing the operation of each air cylinder provided in the processing machine with the work carrying-in / out setting device. 1 ... wire electric discharge machine, 2 ... pallet loading / unloading device, 3 ...
... Wire electrode, 4 ... XY table, 5 ... Slide cover, 7 ... Clamping device, 8 ... Processing tank cover device, 8A ...
Processing tank, 10 Pallet, 11 Pallet retraction and extrusion device, 12 Pallet changer, 14 Connection bar, 15
… Clamp, 17 …… Working table, 20,82 …… Reference plane, 23,24 ……
Positioning stopper, 98 ... Reference hole.

Continued on the front page (56) References JP-A-61-297064 (JP, A) JP-A-63-158730 (JP, U) JP-A-61-178629 (JP, U) JP-A-1-81254 (JP) , U) (58) Field surveyed (Int. Cl. ⁶ , DB name) B23Q 7/00 B23H 7/00-7/02

Claims (4)

(57) [Claims] A work table provided with a reference means mounted on a table, a work tank cover device provided on a work tank mounted on the table and having a slide cover capable of opening and closing an entrance, and a workpiece. A pallet set in advance at a predetermined position, a pallet discharge side support portion provided in parallel with a pallet changer adjacent to the processing table, and a pallet for loading and unloading the pallet between the pallet loading side support portion and the processing table. A pallet retraction / extrusion device provided for the pallet changer for performing retraction and extrusion, and a clamp device for fixing the pallet carried into the processing table to a processing reference portion; A reference means that is set at a predetermined position on the table and matches the reference means of the processing table;
A processing machine with a work loading / unloading setting device, wherein the clamping device includes a connection bar provided on the processing table and provided with a clamp, and an actuator for moving the connection bar up and down. 2. The pallet is provided with a cutout hole wider than a processing area in a central portion for running a wire electrode, and a predetermined position from the reference means for setting the workpiece at a predetermined position on the pallet. 2. The processing machine with a workpiece carrying-in / out setting device according to claim 1, further comprising a plurality of reference holes provided outside the processing area. 3. The connecting bar, wherein the actuator provided on the clamping device presses the reference means of the pallet against the reference means of the worktable by a command of a controller to stop the pallet at a predetermined position. The processing machine with a work carrying-in / out setting device according to claim 1, wherein the machine is moved up and down. 4. A machining tool according to claim 1, further comprising a reference surface cleaning device for cleaning a reference surface of said reference means of said worktable and a reference surface of said reference means of said pallet. A processing machine with a loading / unloading setting device.