JPH0739537Y2 - Machining fluid intrusion prevention structure for taper machining equipment of wire electric discharge machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial field of application" The present invention relates to a wire electric discharge machine, and more particularly to a structure for preventing machining fluid from entering the taper machining device in a wire electric discharge machine equipped with a taper machining device.

[Prior Art] In a conventional taper machining device for a wire electric discharge machine, a machining liquid is introduced from a connecting portion between a guide holder having an upper wire electrode guide provided therein and the taper machining device into a cover for covering the taper machining device. As a means for preventing the intrusion of the so-called, a so-called telescopic has been provided, in which the connecting portion is surrounded by bellows, and a tubular cover made of a plate material is layered so as to be expandable and contractible.

[Problems to be solved by the invention] However, among the above-mentioned conventional machining liquid intrusion prevention means, the method of enclosing the connecting portion between the guide holder and the taper machining device with the bellows requires a large amount of the bellows. There was a problem that it needed a large space.

Further, in the method of providing a so-called telescopic structure in which a tubular cover made of a plate material is superposed in a layered manner at the connection portion and is expandable and contractible, in addition to the problem of space, the machining liquid enters the gap between the plate materials, There was a problem that it was not possible to prevent the intrusion into the interior.

Therefore, the present invention solves the above problems and provides a working fluid intrusion prevention structure for a taper machining apparatus of a wire electric discharge machine that can prevent the machining fluid from entering the taper machining apparatus in a small space. Is an issue.

[Means for Solving the Problem] In order to solve the above-mentioned problems, the present invention is directed to a wire electrode stretched by an upper wire electrode guide and a lower wire electrode guide in a X, Y axis direction orthogonal to each other. A Z-axis slider movably supported in the Z-axis direction orthogonal to the X and Y axes with respect to the main body of a wire electric discharge machine that moves relatively to perform a predetermined machining, and a lower end portion of the Z-axis slider. Said Y
A V-axis slider movably supported in a V-axis direction substantially parallel to the axis, and a lower end portion of the V-axis slider movably supported in a U-axis direction substantially parallel to the X-axis, and the upper wire electrode guide. Of the wire electric discharge machine, which comprises a U-axis slider that supports a guide holder provided therein, and tilts the wire electrode by moving the upper wire electrode guide in the U and V axis directions with respect to the lower wire electrode guide. In the taper machine, one end is fixed to the U-axis slider and the other end is fixed to the guide holder, and is fixed to an arbor extending in the V-axis direction and a lower end portion of the Z-axis slider, and the arbor is fixed to the U-axis. , A taper machine cover which is provided with a first elongated hole extending in the U-axis direction, which is movably inserted in the V-axis direction, and covers the V-axis slider and the U-axis slider, and the taper of the taper machine cover. A second elongated hole fixed in the holder side and extending in the U-axis direction through which the arbor is movably inserted in the U-axis and V-axis directions; and a second elongated hole in the end face of the taper machining device cover side. On the other hand, a shield plate housing provided with a step portion which is a concave surface enlarged in the U and Z axis directions,
At least the inner peripheral portion of the shield plate housing is formed of a soft elastic body that is relatively slidable in the V-axis direction so as to be in close contact with the arbor and closes the first and second elongated holes. Provided is a shielding liquid which moves in the U-axis direction in a gap between a step portion and the taper machining device cover, and a working fluid intrusion prevention structure for a taper machining device of a wire electric discharge machine. .

[Operation] In the working fluid intrusion prevention structure of the taper machining device of the wire electric discharge machine of the present invention having the above-described configuration, the bar-shaped portion of the arbor and the shield plate are movable in the V-axis direction relative to each other, and the shield is provided. The plate and the shield plate housing fixed to the taper cover are relatively movable in the U-axis direction, and the shield plate is in close contact with the arbor, and the first plate is provided on the taper cover. Since the long hole and the second long hole provided in the shield plate housing are closed, the arbor can be moved with respect to the taper processing device cover in either the U or V axis direction, while the taper is formed. The machining liquid is prevented from entering the taper machining device from the outside of the machining device cover.

The guide holder moves in the V-axis direction, and the distance between the guide holder and the taper machining device at the position closest to the cover is determined by the thickness of the shield plate housing in the V-axis direction. Since the thickness of the shield plate housing in the V-axis direction can be made thinner than the bellows or the telescopic lens in the conventional example, it is possible to reduce the dimension of the taper machining device in the V-axis direction. Becomes

[Embodiment] An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a partial cross-sectional view showing a main part of a cross section of a right side surface of a working fluid intrusion prevention structure of a taper machining device for a wire electric discharge machine according to the present invention, and FIG. 2 is a front view.

The taper 1 is attached to a work table (not shown) with respect to an upper wire electrode guide 42 made of a non-conductive material having wear resistance and a wire electrode 46 stretched by a lower wire electrode guide (not shown). It is arranged above the work table of a wire electric discharge machine that performs predetermined machining by relatively moving the workpiece in the X and Y axis directions orthogonal to each other in a horizontal plane.

The Z-axis slider 11 is provided with the X, Y
It is movably supported in the Z-axis direction orthogonal to the axis, and a base 12 is formed at the lower end thereof. A V-axis motor 33 is attached to the right end of the base 12 shown in FIG.

The V-axis slider 31 is movably supported in the V-axis direction via a V-axis direct-acting guide 32 at the lower end of the base 12, and a V-axis feed screw 34 rotatably driven by a V-axis motor 33 causes the base 12 to move. In contrast to this, it is driven in the V-axis direction parallel to the Y-axis.

The U-axis slider 21 is supported at the lower end of the V-axis slider 31 so as to be movable in the U-axis direction via a U-axis linear motion guide 22, and by a U-axis motor 23 mounted on the front side in FIG. A U-axis feed screw (not shown) that is rotationally driven
V-axis slider 31 having a female thread portion to be screwed with a shaft feed screw 31
In contrast, it is driven in the U-axis direction parallel to the X-axis.

The guide holder 41 is provided with an upper wire electrode guide 42 therein, and a power supply (not shown) is slidably contacted with the wire electrode 46 to apply a pulsed voltage from a power supply device (not shown).

The arbor 51 is made of a non-conductive material such as alumina ceramic and has a rod-shaped portion 52 having a circular cross section, which is longer than the moving range in the V-axis direction. One end of the arbor 51 is on the wire electrode side end of the U-axis slider 21 and the other end is. Each is fixed to the guide holder 41, and U
The shaft slider 21 and the guide holder 41 are electrically insulated.

In this way, the U-axis slider 21 with respect to the base 12
The arbor 51, the guide holder 41, and the upper wire electrode guide 42, which are driven in the U and V axis directions by the V axis motor 33 and the U axis motor 23 and fixed to the U axis slider 21, move in the U and V axis directions. The wire 46 inserted in the wire electrode guide 42 is tilted by moving.

The shield plate 71 includes a wiper 72 and an outer plate 76 described later.

The wiper 72 is formed of a soft elastic material such as urethane rubber, and has a groove 73 on the outer peripheral portion thereof, and the circular peripheral portion 74 is in close contact with the rod-shaped portion of the arbor 51 and can slide in the V-axis direction. Has become.

The taper processing device cover 61 is attached to the upper surface of the base 12, and the end face 62 on the guide holder 41 side is inserted with a wiper in the Z-axis direction in order to insert the arbor 51 movably in the U-axis and V-axis directions.
A substantially oblong first elongated hole 63 is formed which is slightly larger than the outer diameter of 72 and the moving range of the wiper 72 in the U-axis direction.

The shield plate housing 91 is an end surface of the taper processing device cover 61.
It is stuck to 62. The shielding plate housing 91 is made of a resin molded product, has a substantially rectangular plate shape, is provided with a second elongated hole 93 that is slightly enlarged with respect to the first elongated hole, and the taper machining device cover 61 side will be described later. The outer plate is provided with a step portion 92 which is a substantially oval concave surface which is slightly larger in the Z-axis direction and sufficiently larger in the U-axis direction than the moving range. Below the step portion 92, there is provided a communication portion 94 which forms a communication hole between the step portion 92 and the outside when attached to the taper machining device cover 61.

The outer plate 76 is made of a resin material that is slightly thinner than the step dimension of the step portion 92, and thus is slightly smaller than the step portion 92 in the Z-axis direction and less than the amount of movement of the U-axis slider 21 in the U-axis direction. It is formed into a substantially oval shape which is smaller and is sufficiently larger than the size obtained by adding the movement amount of the U-axis slider 21 to the second elongated hole 93. The central portion has a circular hole 77, which is fitted into the groove 73 of the wiper 72. The outer plate 76 is moved in the U-axis direction by the arbor 51 while being restrained in the V-axis direction by the step portion 92 of the shielding plate housing 91 and the end surface 62 of the taper processing device cover 61.

"Operation" Next, the operation of the taper machining apparatus 1 of the wire electric discharge machine according to the present invention having the above-mentioned configuration will be described with reference to FIGS.

The outer plate 76 closes the first and second elongated holes 63, 93 to prevent the working fluid from entering the taper working device cover 61 from the wire electrode 46 side.

Of the machining liquid scattered from the wire electrode 46 side, the taper machining device cover 61 may enter into the arbor 51 and the shielding plate 71 at the portions exposed to the outside through the second elongated holes 93, respectively. It was done. Of these,
The working liquid attached to the arbor 51 is wiped off by the wiper 72 of the shield plate 71. The machining fluid attached to the wiper 72 and the outer plate 76 flows downward due to its own weight, and is discharged downward through the communication portion 94.

Next, the operation when the upper wire electrode guide 42 moves in the U and V axis directions to tilt the wire electrode 46 will be described.

First, when moving in the V-axis direction, as shown in FIG. 1, the V-axis motor 31 drives the V-axis slider 31,
The wire electrode 46 moves within the range indicated by the chain double-dashed line, but the arbor 51 and the wiper 72 slide, and the outer plate 76 fitted to the wiper 72 is attached to the end face 62 of the taper device cover 61 and the shield plate. Since it is constrained in the space formed by the stepped portion 92 of the housing 91, intrusion of the machining liquid into the inside of the taper machining device cover 61 is prevented regardless of the movement of the wire electrode 46. When the guide holder 41 moves to the right and comes closest to the taper machining device cover 61, the dimension a which is the distance between the guide holder 41 and the end face 62.
Is set by adding a slight clearance c to the thickness dimension b of the shielding plate housing 91 in consideration of assembling accuracy and the like.

Next, regarding the movement in the U-axis direction, as shown in FIGS. 1 and 2, the U-axis motor 23 drives the U-axis slider 21 relative to the V-axis slider 31, and the wire electrode 46 moves to the first position. Two
It moves within the range shown by the chain double-dashed line in the figure. Arbor 51
The wiper 72, which is in close contact with the rod-shaped portion 52, moves within the range of the first and second elongated holes 63, 93 as shown by the chain double-dashed line. Further, the outer plate 76 moves within the range of the step portion 92, as shown by the chain double-dashed line. At this time, the end of the outer plate 76 on the side opposite to the displacement direction is not exposed from the second elongated hole 93.

As described above, in this embodiment, the guide holder 41 and the taper machining apparatus 1 are electrically insulated from each other, and the guide holder 41 is attached to the U and V axes without invading the machining liquid into the taper machining apparatus cover 61. The wire electrode 46 is tilted.

[Other Embodiments] The present invention is not limited to the details of the above embodiments, and the cross section of the rod-shaped portion of the arbor and the shape of the inner peripheral portion of the shielding plate may be other than circular, such as rectangular. Good.

Further, the shield plate may be one in which the wiper and the outer plate are integrally formed.

"Effects of the device" As described above, in the machining fluid intrusion prevention structure of the wire electric discharge machine taper machining device according to the present invention, the arbor is provided in two directions of the U and V axes with respect to the taper machine cover due to the simple structure. It is possible to prevent movement of the machining liquid from the outside of the taper machining device cover into the taper machining device while allowing the tape to be moved reasonably.

Further, although there is a substantially plate-shaped shielding plate housing between the guide holder and the taper machining device, the dimension in the V-axis direction can be made smaller than that of the bellows or telescopic in the conventional example, so that the U-axis slider and the taper can be tapered. There is an effect that the space between the processing device cover and the taper processing device can be shortened, particularly the dimension of the taper processing device in the V-axis direction can be reduced.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing a main part of a cross section of a right side surface of a working fluid intrusion prevention structure of a taper machining device for a wire electric discharge machine according to the present invention, and FIG. 2 is a front view. 1 ... Tapering device, 11 ... Z-axis slider, 21 ... U
Axis slider, 31 …… V axis slider, 41 …… Guide holder, 42 …… Upper wire electrode guide, 46 …… Wire electrode, 51
…… Arbor, 61 …… Taper processing device cover, 63 …… First
Long hole of 71, shielding plate, 74 inner circumference part, 91 shielding plate housing, 92 step part, 93 second hole.

Claims (1)

[Scope of utility model registration request] 1. A wire electric discharge machine for performing a predetermined machining by moving a workpiece relative to a wire electrode stretched by an upper wire electrode guide and a lower wire electrode guide in X and Y axis directions orthogonal to each other. A Z-axis slider which is movably supported in the Z-axis direction orthogonal to the X and Y axes with respect to the main body, and is movably supported in the V-axis direction substantially parallel to the Y-axis at the lower end of the Z-axis slider. And a U-axis slider which is movably supported at the lower end of the V-axis slider in the U-axis direction substantially parallel to the X-axis and which supports a guide holder in which the upper wire electrode guide is provided. The upper wire electrode guide with respect to the lower wire electrode guide.
In the taper machining device of the wire electric discharge machine, in which the wire electrode is tilted by moving in the U and V axis directions, one end is fixed to the U axis slider and the other end is fixed to the guide holder, respectively, and the wire electrode is moved in the V axis direction. An extending arbor and a first elongated hole fixed in the lower end portion of the Z-axis slider and extending in the U-axis direction through which the arbor is movably inserted in the U-axis and V-axis directions are provided. A taper machining device cover for covering the U-axis slider, and a second length extending in the U-axis direction that is fixed to the guide holder side of the taper machining device cover, and extends through the arbor movably in the U-axis and V-axis directions. A hole, and a shield plate housing provided on the end surface of the taper machining device side that is a concave surface that is enlarged in the U and Z axis directions with respect to the second elongated hole, and at least the inner peripheral portion Close to arbor As described above, the soft elastic body that is relatively slidable in the V-axis direction closes the first and second elongated holes, and the stepped portion of the shielding plate housing and the taper processing device cover A shielding liquid that moves in the U-axis direction in a space between them, and a working fluid intrusion prevention structure for a taper machining device of a wire electric discharge machine.