JPH0541634U - Wire electric discharge machine - Google Patents

Abstract

(57) [Summary] [Objective] To provide a wire electric discharge machine capable of performing high-precision taper machining with increased rigidity. [Structure] On the bed 3, the Y axis and the X that are orthogonal to each other are provided.
A table 9 and a column 11 are supported so as to be movable along an axis, and a groove 61 is provided in an upper arm portion 15 of the column 11 in a V axis direction substantially parallel to the Y axis. A V-axis saddle 63 protruding downward is fitted in the groove 61 and supported so as to be movable in the V-axis direction. Therefore, the upper wire guide 43 and the U-axis guide bearing 3
Since the distance between the first and Z-axis guide bearings 35 becomes short, the moment due to the force applied to the upper wire guide 43 becomes small, high rigidity can be obtained, and highly accurate taper processing can be performed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is directed to a table provided on a bed, on which a workpiece is placed, a pedestal portion standing on the bed at the side of the table, and an arm portion extending from the pedestal portion to the table side. And an XY moving means for moving the table and the column relative to each other in X and Y axes perpendicular to each other, and along a V axis substantially parallel to either of the X and Y axes. A V-axis moving member movably supported on the arm portion of the column and a V-axis moving member that can move along a U-axis orthogonal to the V-axis in a plane substantially parallel to an XY plane including the X and Y axes. A wire electric discharge machine having a U-axis moving member supported by the V-axis moving member and a wire guide supported by the U-axis moving member and guiding a wire electrode for cutting the workpiece. Is.

[0002]

[Prior Art]

 Conventionally, as shown in FIG. 4, a wire electric discharge machine of this type has a Y-axis extending in the horizontal direction in the horizontal plane and an X-axis extending in the direction orthogonal to the Y-axis in the horizontal plane (front-rear direction in the figure). A cross table 5 (XY moving means) is supported on the bed 3 so as to be movable along the axis, and the cross table 5 supports a working liquid tank 10 for storing a working liquid. In the processing liquid tank 10, a table 9 on which the workpiece 7 is placed is arranged. Further, a column 11 is provided on the bed 3 on the side of the table 9. The column 11 extends along a V-axis substantially parallel to the Y-axis from the upper part of the pedestal 13 to the table 9 side from the upper part of the pedestal 13 and the tip thereof is a machining liquid. An upper arm portion 15 arranged above the tank 10 and a tip extending from the central portion of the pedestal portion 13 to the table 9 side along an axis substantially parallel to the Y-axis and arranged in the machining liquid tank 10. In addition, the lower arm portion 17 is arranged below the workpiece 7 placed on the table 9.

A V-axis guide bearing 19 is provided along the V-axis on the upper surface of the upper arm portion 15. The V-axis guide bearing 19 has a V-axis saddle 21 as a V-axis moving member. The V-axis guide rail 23 provided is fitted. The V-axis saddle 21 is moved by the V-axis motor 25 along the V-axis. The V-axis motor 25 is provided with a V-axis encoder 26 that detects the rotation angle of the V-axis motor 25 and outputs a signal. The signal from the V-axis encoder 26 determines the amount of movement of the V-axis saddle 21. To be detected.

On the left end surface of the V-axis saddle 21 in the figure, a U-axis guide rail 27 is provided along a U-axis substantially parallel to the X-axis. A U-axis guide bearing 31 provided on a U-axis table 29 as a U-axis moving member is fitted to the U-axis guide rail 27. The U-axis table 29 is moved along the U-axis by the U-axis motor 33. The U-axis motor 33 is provided with a U-axis encoder (not shown) that detects the rotation angle of the U-axis motor 33 and outputs a signal, and the signal from the U-axis encoder causes the U-axis table 29 to move. The amount of movement is detected.

On the left end surface of the U-axis table 29 in the figure, a Z-axis guide bearing 35 is provided along a Z-axis orthogonal to the X-axis and the Y-axis. A Z-axis guide rail 39 provided on a Z-axis slider 37 is fitted into the Z-axis guide bearing 35. The Z-axis slider 37 is moved along the Z-axis by a Z-axis motor (not shown). The Z-axis motor is provided with a Z-axis encoder (not shown) that detects the rotation angle of the Z-axis motor and outputs a signal. The signal from the Z-axis encoder moves the Z-axis slider 37. The amount is detected. An upper wire guide 43 that guides a wire electrode 41 for cutting the workpiece 7 is supported at the lower end of the Z-axis slider 37. A guide roller 45 for guiding the wire electrode 41 to the upper wire guide 43 is provided at the center of the Z-axis slider 37.

A lower wire guide 47 that guides the wire electrode 41 is supported at the tip of the lower arm portion 17. A guide roller 51 that guides the wire electrode 41 guided by the lower wire guide 47 to the wire electrode drive device 49 is provided inside the tip of the lower arm portion 17. The wire electrode drive device 49 drives the wire electrode 41. It is sent to the collection box 53 and stored. Here, the workpiece 7 is arranged between the upper wire guide 43 and the lower wire guide 47.

The wire electrode 41 wound on a delivery roll (not shown) is guided by a guide roller 45 via a tension roller (not shown) and a pinch roller (not shown). The guided wire electrode 41 is guided by the upper wire guide 43 and the lower wire guide 47 so as to extend vertically with respect to the workpiece 7 fixed to the table 9. Then, the wire electrode 41 is guided from the lower wire guide 47 to the guide roller 51, fed by the wire electrode driving device 49, and stored in the recovery box 53.

In the wire electric discharge machine configured as described above, when a high voltage is applied to the wire electrode 41, a high voltage difference is generated between the wire electrode 41 and the workpiece 7, and electric discharge occurs. .. Then, if the workpiece 7 is appropriately moved on the horizontal plane by the cross table 5, electric discharge machining according to a desired shape is performed. Further, by moving the V-axis saddle 21 and the U-axis table 29 by the V-axis motor 25 and the U-axis motor 33 to move the upper wire guide 43 on the horizontal plane, the upper wire guide 43 and the lower wire guide 47 are separated. The wire electrode 41 in between is inclined and taper processing is performed.

[0009]

[Problems to be solved by the device]

 When the upper wire guide 43 is moved on the horizontal plane by the V-axis motor 25 and the U-axis motor 33, the wire electrode 41 tensioned by the tension roller, the pinch roller and the wire electrode driving device 49 is moved to the upper wire guide 43. Upon contact, a horizontal force is applied to the upper wire guide 43. In the wire electric discharge machine described above, since the V-axis saddle 21 is supported on the upper surface of the upper arm portion 15 of the column 11, the distance between the upper wire guide 43 and the U-axis guide bearing 31 and the Z-axis guide bearing 35 is long. Therefore, the moment applied to the U-axis guide bearing 31 and the Z-axis guide bearing 35 due to the horizontal force applied to the upper wire guide 43 becomes large, and the U-axis guide bearing 31 and the Z-axis guide bearing 35 have high rigidity. It becomes difficult to hold. In addition, the error due to the Abbe principle becomes large, making it difficult to perform highly accurate taper processing.

The present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to provide a wire electric discharge machine capable of enhancing rigidity and performing highly accurate taper machining.

[0011]

[Means for Solving the Problems]

 In order to achieve this object, according to the present invention, there is provided a table on which a workpiece is placed, a pedestal portion standing upright on the bed on the side of the table, and the pedestal portion. A column provided with an arm portion extending to the table side, an XY moving means for relatively moving the table and the column relative to X and Y axes orthogonal to each other, and substantially parallel to either of the X and Y axes. A V-axis moving member supported by the arm portion of the column so as to be capable of V-moving along the V-axis, and a U-axis orthogonal to the V-axis in a plane substantially parallel to the XY plane including the X and Y axes. A U-axis moving member movably supported by the V-axis moving member, and a wire guide supported by the U-axis moving member for guiding a wire electrode for cutting the workpiece. In the wire electric discharge machine that the The arm portion, groove portion substantially symmetrically formed in the V-axis direction, the V-axis moving member is fitted into the groove to the center of its tip surface.

[0012]

[Action]

 In the wire electric discharge machine of the present invention having the above structure, the arm portion of the column is formed with the groove portion in the V-axis direction substantially symmetrically with respect to the center of the tip end surface thereof, and the V-axis moving member is provided with the groove portion. It is fitted in the groove. Therefore, the distance between the wire guide and the U-axis moving member can be shortened, the rigidity can be increased, and highly accurate taper processing can be performed.

[0013]

【Example】

 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

However, the same members as those of the conventional technique are designated by the same reference numerals, and the description thereof will be omitted.

As shown in FIG. 1, the upper arm portion 15 is provided with a groove portion 61 symmetrically with respect to the center of the tip end surface thereof in the V-axis direction, and the groove portion 61 is provided in the upper arm portion 15. The table 9 has a front end surface and an opening on the upper surface. Further, as shown in FIG. 3, V-axis guide bearings 19 are provided on both outer sides of the opening of the groove 61 on the upper surface of the upper arm 15, and the V-axis guide bearings 19 are provided downward. V-axis guide rails 23 provided respectively at both ends of a projecting V-axis saddle 63 (V-axis moving member) are fitted, and the V-axis saddle 63 is moved by the V-axis motor 25 along the V-axis. To be done. Here, the protruding portion 63 a of the V-axis saddle 63 is fitted in the groove portion 61.

The U-axis guide rail 27 is provided on the left end surface of the V-axis saddle 63 in FIG. 1, and the U-axis guide rail 27 has a U-axis guide bearing provided on the U-axis table 29. 31 is fitted.

As shown in FIG. 2, the wire electrode 41 wound around the delivery roll 65 is guided by the guide roller 45 via a tension roller 67 and a pinch roller 68. As shown in FIG. 1, the guided wire electrode 41 is guided by the upper wire guide 43 and the lower wire guide 47 so as to extend in the vertical direction with respect to the workpiece 7 mounted and fixed on the table 9. Is being guided by. Then, the wire electrode 41 is guided from the lower wire guide 47 to the guide roller 51, fed by the wire electrode driving device 49, and stored in the recovery box 53.

When a high voltage is applied to the wire electrode 41, a high voltage difference is generated between the wire electrode 41 and the workpiece 7, and a discharge is generated. Then, by appropriately moving the workpiece 7 on the horizontal surface by the cross table 5, electric discharge machining according to a desired shape is performed. Further, by moving the V-axis saddle 63 and the U-axis table 29 by the V-axis motor 25 and the U-axis motor 33 to move the upper wire guide 43 on the horizontal plane, the upper wire guide 43 and the lower wire guide 47 are separated. The wire electrode 41 in between is inclined and taper processing is performed.

In the wire electric discharge machine configured as described above, since the V-axis saddle 63 is fitted in the groove portion 61 provided in the upper arm portion 15 of the column 11, the upper wire guide 43 and the U-axis guide are arranged. When the distance between the bearing 31 and the Z-axis guide bearing 35 is shortened and the upper wire guide 43 is moved on the horizontal plane by the V-axis motor 25 and the U-axis motor 33, the tension roller 67, the pinch roller 68 and the wire electrode drive When the wire electrode 41 tensioned by the device 49 contacts the upper wire guide 43, the moment applied to the U-axis guide bearing 31 and the Z-axis guide bearing 35 by the horizontal force applied to the upper wire guide 43 is applied. The U-axis guide bearing 31 and the Z-axis guide bearing 35 maintain high rigidity. You can Further, the error due to the Abbe principle is reduced, and highly accurate taper processing can be performed.

Further, in this embodiment, since the groove portion 61 is provided symmetrically with respect to the center of the tip end surface of the upper arm portion 15, the upper arm portion 15 has good symmetry, and the upper arm portion 15 is provided. High rigidity can be maintained.

In the present embodiment, the groove portion 61 provided in the upper arm portion 15 of the column 11 has openings on the tip end surface and the upper surface of the upper arm portion 15 on the table 9 side. The opening may be provided only on the tip surface of the upper arm 15 on the table 9 side.

Further, in the present embodiment, the cross table 5 with the table 9 fixed moves the table 9 in the X and Y axes, and moves the table 9 and the column 11 relatively in the X and Y axes. The table 5 may be fixed to the bed 3 and a mechanism for moving the column 11 in the X and Y axes may be provided to move the table 9 and the column 11 relative to each other in the X and Y axes.

[0023]

[Effect of the device]

 As is apparent from the above description, according to the wire electric discharge machine of the present invention, since the V-axis moving member is fitted in the groove provided in the arm portion of the column, the wire guide and the U-axis moving member are provided. When the wire guide is moved on a horizontal plane by the V-axis moving member and the U-axis moving member, the wire electrode comes into contact with the wire guide, which causes horizontal force applied to the wire guide. The moment applied to the U-axis moving member is reduced, high rigidity can be maintained, and the error due to the Abbe's principle is reduced, so that highly accurate taper machining can be performed. Further, since the groove is provided substantially symmetrically with respect to the center of the tip end surface of the arm portion, the arm portion has good symmetry and the arm portion can retain high rigidity.

[Brief description of drawings]

FIG. 1 is a front view of a wire electric discharge machine that is an embodiment of the present invention.

FIG. 2 is a side view of the wire electric discharge machine.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a front view showing a conventional wire electric discharge machine.

[Explanation of symbols]

 9 table 11 column 13 pedestal part 15 upper arm part 21 V-axis saddle 29 U-axis table 43 upper wire guide 61 groove part

Claims (1)

[Scope of utility model registration request] 1. A table provided on a bed on which a workpiece is placed, a pedestal portion standing upright on the bed at a side of the table, and an arm portion extending from the pedestal portion to the table side. And a column provided with, and X for relatively moving the table and the column in X and Y axes orthogonal to each other.
It includes a Y moving means, a V axis moving member supported by the arm portion of the column so as to be able to perform V movement along a V axis substantially parallel to any of the X and Y axes, and the X and Y axes. A U-axis moving member supported by the V-axis moving member so as to be movable along a U-axis orthogonal to the V-axis in a plane substantially parallel to the XY plane;
In a wire electric discharge machine supported by the U-axis moving member and having a wire guide for guiding a wire electrode for cutting the workpiece, an arm portion of the column is provided with a center of a tip surface thereof. A wire electric discharge machine, wherein grooves are formed substantially symmetrically in the V-axis direction, and the V-axis moving member is fitted in the grooves.