JPH03264211A - Wire cut electric discharge machining device - Google Patents

Abstract

PURPOSE:To transmit no external force to a lower arm, by providing the support member provided at about the center of the seal plate which closes the oblong hole longer in the drawing direction of a lower arm with its support from a 1st table. CONSTITUTION:An oblong hole 45 longer in the drawing direction of a lower arm 9 is provided at one side wall of the work tank 41 equipped with a 1st table 33 and 2nd table 39 and also a seal plate 49 closing this oblong hole 45 is provided freely movably relatively in the same direction. Also, a support member 51 provided at about the center of the seal plate 49 is provided with its support by the 1st table 33. So, the external force becomes received by the support member 51 even in the case of the work tank 41 being moved in the direction orthogonal with the drawing direction of the lower arm 9, and the external force is not transmitted to the lower arm 9.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a wire-cut electrical discharge machining device, and more specifically, the present invention relates to a wire-cut electrical discharge machining device, and more specifically, to This invention relates to a wire-cut electrical discharge machining device that has an improved support part that supports a seal plate.

(Prior Art) For example, in a conventional immersion type wire-cut electrical discharge machining device, a frame stands up on one side of a bed, and upper and lower arms each having upper and lower guides at their tips are spaced apart from each other. It is set horizontally. In addition, on the other side of the bed, there is an
A cross table is provided, and a processing tank is provided on this XY cross table.

The tip of the lower arm faces into the processing tank through a long hole provided in one side wall of the processing tank in the X-axis direction. A seal plate is provided to move in the X-axis direction to seal the long hole so that machining fluid does not leak from the long hole to the outside of the machining tank.

(Problems to be Solved by the Invention) By the way, in the above-mentioned conventional wire-cut electric discharge device, the wire is run from above toward the upper and lower guides, and wire-cut electric discharge machining is performed on a workpiece provided in a machining tank. . When the X-Y cross table moves in the X-axis direction due to wire-cut electrical discharge machining, the lower arm deforms due to the resistance generated in the seal plate, causing the tip of the lower arm to bend slightly from its original position in the X-axis direction. nothing.

Accordingly, the relative position of the lower guide with respect to the upper guide is
A slight error occurs in the axial and Y-axis directions. As a result, the workpiece to be machined is tilted, resulting in a problem of poor machining accuracy.

An object of the present invention is to improve the above-mentioned problems by preventing external force from being transmitted to the lower arm even when the machining tank moves in a direction perpendicular to the extending direction of the lower arm when performing wire cut electrical discharge machining. Another object of the present invention is to provide a wire-cut electrical discharge machining device that can perform highly accurate machining without causing deformation of the lower arm.

[Structure of the Invention (Means for Solving the Problems)] In order to achieve the above object, the present invention provides a wire-cut electric discharge machining apparatus with a lower arm having a wire guide section at its tip provided horizontally on the frame. A long hole extending in the perpendicular direction is provided in one side wall of the processing tank equipped with a first table movable in a direction parallel to the extending direction of the lower arm and a second table movable in a perpendicular direction. A seal plate that closes the elongated hole is provided so as to be relatively movable in the same direction, and a support member provided approximately in the center of the seal plate is supported by the first table, and the support member is provided so as to be movable relative to the support member. A wire-cut electric discharge machining apparatus was constructed by penetrating the lower arm so that the tip of the lower arm protruded into the machining tank.

(Function) By adopting this wire cut electrical discharge machining equipment,
A long hole is provided on one side wall of the processing tank equipped with the first table and the second table in the direction in which the lower arm extends, and a seal plate that closes this long hole is provided so as to be relatively movable in the same direction. It is being In addition, since the support member provided approximately at the center of the seal plate is supported by the first table, even if the processing tank moves in a direction perpendicular to the extending direction of the lower arm, external force will not be applied to the support member. The external force is not transmitted to the lower arm because it is received by the member.

As a result, the lower arm is not deformed and the lower guide provided at the tip of the lower arm is not displaced, so that highly accurate machining can be performed.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

Referring to FIG. 1, a frame 5 is erected on the rear side (on the left side in FIG. 1) of the bed 3 of the wire-cut electrical discharge machining apparatus 1. As shown in FIG. An upper frame 7 extending in the front-rear direction (Y-axis direction) is horizontally fixed to the upper part of the front side wall (right side wall in FIG. 1) of the frame 5 with bolts or the like. Further, a center portion of the front side wall of the frame 5 is provided parallel to the upper frame 7 and at Y°.
A lower frame 9 extending in the axial direction is fixed with bolts or the like.

An upper guide 13 having an upper die nozzle 11 at its lower part is provided at the tip of the upper frame 7, and a lower guide 17 having a lower die nozzle 15 at its upper part is provided at the tip of the lower frame 9. The upper guide 13
It is located opposite to the

A support bracket is attached to the upper end of the front frame 5, and a wire supply reel 23 on which a wire electrode 21 is wound is rotatably supported on the support bracket. An L-shaped bracket 25 is attached to the upper arm 7 near the upper guide 13 provided at the tip of the upper arm 7.
A rotatable guide roller 27 is supported at the upper end of the roller 5 .

With the above configuration, the wire electrode 21 wound around the wire supply reel 23 is pulled out and guided to the guide roller 27, and the upper die noise 11 of the upper guide 13 is pulled out. The lower arm 9 passes through the upper guide noise 15 of the lower guide 17.
A pair of upper and lower conveyor belts is provided inside the machine to eject it to the outside of the machine.

A plurality of two Y-axis guide rails extending in the Y-axis direction are laid on the bed 3, and the guide rails 29
A Y-axis table 33 as a first table is provided with a plurality of Y-axis guide members 31 at the bottom thereof. X-axis guide rails 3 parallel to each other are placed on this Y-axis table 33.
5 is provided extending in a direction (X-axis direction) perpendicular to the plane of the paper in FIG. The X-axis guide rail 35 is provided with an X-axis table 39 as a second table having an X-axis guide member 37 at the bottom thereof.

With the above configuration, when the Y-axis drive device (not shown) is driven, the Y-axis guide member 31 is guided by the Y-axis guide rail 29, and the Y-axis table 33 is moved in the Y-axis direction.
When the X-axis drive device (not shown) is driven, the X-axis guide member 37 is guided by the X-axis guide rail 35, and the three X-axis tables are moved.

A box-shaped machining tank 41 with an open top is provided on the X-axis table 39, and a work table 43 is erected on the right side of the bottom surface of the machining tank 41 in FIG. A work W to be machined is placed on this work table 43.

With the above configuration, by moving the X-axis and Y-axis tables 39 and 33, the processing tank 41 is moved in the X-axis and Y-axis directions, and the workpiece W is similarly moved in the X-axis and Y-axis directions.

One side wall of the processing tank 41 (left side wall in FIG. 1)
A long hole 45 is formed in the X-axis direction, and
Seal guides 47U and 47D are provided inside the processing tank 41 at the upper and lower parts of the elongated hole 45, respectively. The seal guides 47U and 47D are provided with four seal plates that close the elongated hole 45 and are relatively movable in the X-axis direction.

A support member 51 is supported by bolts or the like on the left side wall of the Y-axis table 33, and a hollow cylindrical portion 51C, which is the upper part of the support member 51, is provided approximately at the center of the seal plate 49. A flange 53 is provided at the tip of the hollow cylindrical portion 5IC in contact with the outer periphery of the lower arm 9 via a sealing member.Thus, the sealing member of the flange 53 fills the flange 53 with the machining fluid 41. Processing fluid is prevented from leaking to the outside.

With the above configuration, the wire electrode 21 is connected to the upper die nozzle 1.
1. While traveling through the lower die nozzle 15, the workpiece W is moved in the X-axis and Y-axis directions, and electrical discharge machining is performed on the workpiece W into a desired shape by applying electricity to the wire electrode 21. Become.

When performing electric discharge machining on workpiece W, the three X-axis tables are
Even if it is moved in the axial direction and the processing tank 41 is moved in the same direction,
Since the external force is received by the hollow cylindrical portion 51C of the support member 51, the external force is not transmitted to the lower arm 9. Therefore, the lower arm 9 is not deformed and the lower guide 17 provided at the tip of the lower arm 9 is not displaced, so that there is no relative displacement between the upper guide 13 and the lower guide 17. Thus, highly accurate electrical discharge machining can be performed.

FIGS. 2 and 3 show other embodiments in place of the one shown in FIG. In FIGS. 2 and 3, the same members as those in FIG. 1 are given the same reference numerals, and only the different parts will be explained.

First, in FIG. 2, on the outer periphery of the lower arm 9 provided on the frame 5 extending in the Y-axis direction, a bending member 57 protrudes from the frame 5 having a hollow cylindrical shape via a seal member 55. is provided, and this deflection receiving member 5
One end of 7 is fixed to the frame 5 with a bolt or the like. Further, a flange 53 is provided on the outer circumferential portion of the bending receiving member 57 on the distal end side in contact with it via a sealing member.

With the above configuration, when performing electric discharge machining on the workpiece W, even if the X-axis table 39 is moved in the X-axis direction and the machining tank 41 is moved in the same direction, the external force is not applied to the hollow cylindrical portion 51 of the support member 51.
Since the external force is received by the bending receiving member 57 via C, the external force is not transmitted to the lower arm 9. Therefore, the lower arm 9 is not deformed and the lower guide 17 provided at the tip of the lower arm 9 is not displaced.
There is no relative displacement between the lower guide 17 and the lower guide 17 as in FIG. Thus, highly accurate electrical discharge machining can be performed.

In FIG. 3, a hollow cylindrical bending member 61 is provided on the outer periphery of the lower arm 9, which is provided on the frame 5 and extends in the Y-axis direction, with a seal member 59 interposed therebetween. 61 is fixed to the lower arm 9 on the left side with a bolt 63. Further, a flange 53 is provided on the outer periphery of the tip end of the deflection receiving member 61 so as to be in contact with it via a sealing member, as in FIG.

With the above configuration, when performing electric discharge machining on the workpiece W, even if the X-axis table 39 is moved in the X-axis direction and the machining tank 41 is moved in the same direction, the external force is not applied to the hollow cylindrical member 5 of the support member 51.
Since the external force is received by the deflection receiving member 61 via 1C, the external force is not transmitted to the lower arm 9. Therefore, lower arm 9
Since the lower guide 17 provided at the tip of the lower arm 9 does not shift its position without causing any deformation, the upper guide 1
3 and the lower guide 17, there is no relative displacement as in FIGS. 1 and 2. Thus, highly accurate electrical discharge machining can be performed.

Note that this invention is not limited to the embodiments described above, and can be implemented in other forms by making appropriate changes.

[Effects of the Invention] As can be understood from the above description of the embodiments, according to the present invention, on one side wall of the processing tank equipped with the first table and the second table, there is a An elongated hole is provided, and a sealing plate for closing the elongated hole is provided so as to be relatively movable in the same direction. In addition, since the support member provided approximately at the center of the seal plate is supported by the first table, even if the processing tank moves in a direction perpendicular to the extending direction of the lower arm, external force will not be applied to the support member. Since the external force is received by the member, the external force is not transmitted to the lower arm.

Therefore, the lower arm is not deformed and the lower guide provided at the tip of the lower arm is not displaced, so that highly accurate electrical discharge machining can be performed.

[Brief explanation of drawings]

FIG. 1 is a side view of a wire-cut electric discharge machining apparatus according to an embodiment of the present invention, and FIGS. 2 and 3 are side views of main parts of the wire-cut electric discharge machining apparatus in place of FIG. 1. 1... Wire cut electric discharge machining device 2... Frame 9... Lower frame 1
7... Lower guide 21... Wire electrode 33.
...Y-axis table (first table) 39...X-axis table (second table) 41...processing tank 45...
・4 long holes...Seal plate 51...Support member 57
．． 61... Flexible member

Claims (1)

[Claims] In a wire-cut electric discharge machining device, a lower arm having a wire guide portion at the tip is provided horizontally on the frame, a first table movable in a direction parallel to the extending direction of the lower arm, and a second table movable in a direction perpendicular to the extending direction of the lower arm. A long hole extending in the perpendicular direction is provided in one side wall of the processing tank equipped with a table, and a sealing plate that closes this long hole is provided so as to be relatively movable in the same direction, and approximately in the center of the sealing plate. The wire is characterized in that the supporting member is supported by the first table, and the wire is made to pass through a lower arm so as to be moved relative to the supporting member, so that the tip of the lower arm projects into the processing bath. Cut electrical discharge machining equipment.