WO2015043103A1

WO2015043103A1 - Line cutting machining method and apparatus for ring-shaped workpiece

Info

Publication number: WO2015043103A1
Application number: PCT/CN2014/000110
Authority: WO
Inventors: 宁新华
Original assignee: 青岛元通机械有限公司
Priority date: 2013-09-29
Filing date: 2014-01-28
Publication date: 2015-04-02

Abstract

A line cutting machining method and apparatus for a ring-shaped workpiece (4). The apparatus comprises a rotary table (3) and a wire frame mechanism. The wire frame mechanism comprises an upper wire arm (6), a lower wire arm (7), a wire frame (8), and a wire storage barrel (9). An electrode wire working part (5) is disposed between the upper wire arm (6) and the lower wire arm (7). A rotation axis of the rotary table (3) perpendicularly intersects with an extension line of the electrode wire working part (5). When the rotary table (3) drives the ring-shaped workpiece (4) to perform rotary motion around the axis of the ring-shaped workpiece (4), the wire frame mechanism drives the electrode wire working part (5) to move along the axis direction of the ring-shaped workpiece (4), and the electrode wire working part (5) enters from an end surface of the ring-shaped workpiece (4) and cuts to form a curve on a ring wall, and extension lines of all generatrices of cut surfaces perpendicularly intersect at the axis of the ring-shaped workpiece (4).

Description

Wire cutting processing method and device for circular workpiece

The invention belongs to the technical field of wire cutting, and in particular relates to a wire cutting processing method and device for a circular ring workpiece. Background technique

Existing wire-cutting machines are generally used to machine workpieces having two upper and lower planes, specifically in two types. A commonly used one is that the upper and lower wire arms are fixed, and the table moves in parallel in the XY horizontal plane. The busbar of the workpiece cut surface cut by this wire-cutting machine is perpendicular to the XY horizontal plane. 1 is a schematic structural view of the wire cutting machine tool, which includes a bed body 1, a Y-axis slide plate 2, an X-axis slide plate 3, a wire slide plate 4, a storage wire barrel 5, a wire frame 6, an upper wire arm 7, and a lower wire. The arm 8, the wire working portion 9 and the electrical control cabinet 10. 2 is a working principle diagram of a conventional wire cutting machine tool, which has a bed body 1, a table 11, a workpiece 12, a pulse power source 13, a wire working portion 9, a guide wheel 15, an upper wire arm 7, and a lower wire arm 8, The wire frame 16, the working fluid circulation system 17, and the storage tube 5. In Fig. 2, the storage tube 5, the wire frame 16, the upper wire arm 7, the lower wire arm 8 and the guide wheel 15 serve to store, wind and guide the wire, collectively referred to as a wire frame mechanism. The electrode wire bypassing the guide wheel 15 between the upper wire arm 7 and the lower wire arm 8 in Fig. 2 is a wire wire working portion which performs cutting of the workpiece. The other has a four-axis linkage function, in addition to the translational movement of the table in the XY horizontal plane, the wire frame mechanism can also move in the U and V directions. The wire cutting machine cuts the busbar of the workpiece's cutting surface and can be inclined to the XY horizontal plane and cut into workpieces with upper and lower planes. In industrial production, it is sometimes necessary to cut a circular workpiece into a plurality of segments along its circumferential direction, and each segment is required to have a "fan ring" shape along the axis of the circular workpiece, and the segments are cut on both sides. The extensions of the busbars intersect perpendicularly to the axis of the toroidal workpiece. In this case, the existing wire cutting method and apparatus cannot be realized.

Summary of the invention

The object of the present invention is to provide a method and a device for cutting a circular workpiece line, by which a circular workpiece can be cut into a plurality of segments along its circumferential direction, each segment being along the ring Each section of the workpiece axis has a "fan ring" shape, and the extension lines of all the busbars on both sides of the segment perpendicularly intersect the axis of the circular workpiece.

The invention is realized by the following technical solutions: A method for cutting a circular workpiece line, comprising the following steps:

(1) mounting and fixing the annular workpiece on the rotary table, the axis of the circular workpiece coincides with the rotary axis of the rotary table;

(2) The rotary table drives the circular workpiece to rotate around its axis, and the wire frame mechanism drives the working portion of the wire to move along the axis of the circular workpiece, and the working portion of the wire disposed on the wire frame is rounded. The end surface of the annular workpiece enters and cuts the workpiece, and the rotation axis of the rotary table intersects perpendicularly with the extension line of the working portion of the wire, the electrode wire The linear motion of the portion driven by the wire frame mechanism and the rotary motion of the workpiece are controlled by a predetermined program to complete the wire cutting process for the circular workpiece.

The invention further comprises a circular workpiece wire cutting processing device, comprising a worktable and a wire frame mechanism, the wire frame mechanism comprising an upper wire arm, a lower wire arm, a wire frame and a storage wire barrel, wherein the working part of the wire electrode is arranged on the upper wire Between the arm and the lower arm, the table is a rotary table, and the axis of rotation of the rotary table intersects perpendicularly with the extension of the working portion of the wire.

The rotary table is vertically disposed, that is, the rotary axis of the rotary table is in a horizontal plane.

The rotary table can also be horizontally arranged, that is, the rotary axis of the rotary table is perpendicular to the horizontal plane.

The rotary motion of the rotary table and the linear motion of the working portion of the wire under the wire frame are interconnected by a digital control program.

The rotary table is connected with a swing mechanism, and the swing mechanism may be a gear transmission mechanism, a chain transmission mechanism, a worm gear transmission mechanism or a direct drive motor mechanism.

The beneficial effects of the invention are:

The invention solves the problem that the existing wire cutting processing method and device cannot process the circular ring workpiece, and the machining method and the device can cut the circular ring workpiece into several segments along the circumferential direction thereof, and each segment along the segment Each section of the circular workpiece in the axial direction is in the shape of a "fan ring", and the extension lines of all the busbars on the cutting surfaces of the segments intersect perpendicularly to the axis of the circular workpiece.

DRAWINGS

1 is a schematic structural view of a conventional wire cutting machine tool;

Figure 2 (a) is a schematic view showing the working state of the existing wire cutting machine tool;

Figure 2 (b) is a working principle diagram of the prior cutting machine;

3 is a schematic view of a circular ring workpiece wire cutting machine in Embodiment 1;

Figure 4 is a schematic view showing the circular workpiece in the first embodiment cut into segments in the circumferential direction;

Figure 5 is a schematic view showing the segment cutting of the circular wire workpiece cutting machine in the second embodiment;

6 is a schematic view of a circular ring workpiece wire cutting machine in Embodiment 3;

Figure 7 is a complete pattern circle formed in the first embodiment in Example 4;

Fig. 8 is a view showing the wire cutting processing method and apparatus for a circular workpiece proposed by the present invention in the fourth embodiment, in which the circular pattern is cut in the circumferential direction thereof.

Fig. 9 is a complete set of tire-type tire active mold ribs which are spliced together in the fourth embodiment.

In the above picture: 1 bed; 2 head box; 3 rotary table; 4 circular workpiece; 5 wire working part; Arm; 7 lower wire arm; 8 wire frame; 9 storage tube; 10 wire slide; 11Y axis slide; 12 tooling; 13 part ring segment;

detailed description

The invention will be further described below in conjunction with the drawings and embodiments.

Example 1

In the embodiment, the rotary cutting table of the wire cutting processing device is vertically disposed, that is, the rotary axis of the rotary table is in a horizontal plane, as shown in FIG. The wire cutting processing device comprises a bed body 1, a headboard box 2, a rotary table 3, a wire working portion 5, an upper wire arm 6, a lower wire arm 7, a wire frame 8, a storage tube 9, a wire slide 10 and Y-axis slide 11 . The head box 2 of the wire cutting processing device is mounted on the bed 1, the rotary table 3 is mounted on the horizontal output shaft of the headstock 2, and the annular workpiece 4 is fixedly mounted on the rotary table 3, the axis thereof The rotary axes of the rotary table 3 coincide. The rotary table 3 is connected to the swing mechanism, and the swing mechanism drives the table to perform a swing motion. The slewing mechanism may be a gear transmission mechanism, a chain transmission mechanism, a worm gear transmission mechanism or a direct drive motor mechanism. The Y-axis slide 11 is mounted on the bed 1 and is disposed along the direction of the rotary axis of the rotary table. The upper wire arm 6, the lower wire arm 7, the wire frame 8, the wire storage tube 9 and the wire slide plate 10 constitute a wire frame mechanism, and the wire frame mechanism is disposed on the Y-axis slide plate 11. The wire working portion 5 is located between the upper wire arm 6 and the lower wire arm 7. The rotary axis of the rotary table 3 described above intersects perpendicularly with the extension of the wire working portion 5.

The process for implementing the wire cutting process of the device comprises the following steps:

In the first step, the toroidal workpiece 4 is fixedly mounted on the rotary table 3, and its axis coincides with the rotary axis of the rotary table 3.

In the second step, the device is started, and the rotary table 3 drives the circular workpiece 4 to rotate around the rotary coordinate axis B, and the working portion of the wire is reciprocated along the coordinate axis Y on the moving slide 11 under the driving of the wire frame mechanism. Linear motion. The electrode wire working portion 5 enters from the end face of the annular workpiece 4 and starts cutting.

The above-mentioned rotary motion of the rotary table 3 together with the circular workpiece 4 around the axis B of the rotary coordinate axis and the reciprocation of the wire working portion on the Y-axis slide 11 along the coordinate axis Y by the wire working portion The linear motions are interrelated and controlled by a pre-programmed NC program, so that the desired curve can be cut on the annular wall of the toroidal workpiece and that all of the busbars of the cutting surface intersect perpendicularly to the axis of the workpiece being cut. Fig. 4 is a schematic view showing the circular workpiece 4 cut into segments in the circumferential direction.

Example 2

In this embodiment, a part of the ring segment of the circular workpiece is machined by the wire cutting processing device proposed by the present invention. As shown in FIG. 5, the money cutting processing apparatus of FIG. 5 includes a bed body 1, a headboard 2, a rotary table 3, a wire working portion 5, an upper wire arm 6, a lower wire arm 7, a wire frame 8, and a storage. The wire barrel 9, the wire slide 10, the Y-axis slide 11, and the tooling 12. Tooling 12 fixed On the rotary table 3, a part of the ring segment 4 of the toroidal workpiece is fixedly mounted on the tooling 12. This has the advantage that multiple wire cutting machines can be used to simultaneously process multiple partial ring segments on the same circular workpiece.

Others are the same as in the first embodiment.

Example 3

In the embodiment, the rotary cutting table of the wire cutting processing device is horizontally disposed, that is, the rotary axis of the rotary table is perpendicular to the horizontal surface, as shown in FIG. The wire cutting processing device in Fig. 6 comprises a bed 1, a rotary table 3, a wire working portion 5, a left wire arm 6', a right wire arm 7', a wire frame 8, a storage tube 9, a wire slide 10 and Z-axis slide 14. The wire cutting machine rotary table 3 is mounted on the horizontal surface of the bed 1. The rotary table 3 is mounted on the vertical output shaft of the bed 1, and the circular workpiece 4 is fixedly mounted on the rotary table 3, the axis of which coincides with the rotary axis of the rotary table 3. The above-mentioned rotary table 3 is connected with a swing mechanism, and the swing mechanism drives the table to perform a swing motion. The slewing mechanism may be a gear transmission mechanism, a chain transmission mechanism, a worm gear transmission mechanism or a direct drive motor mechanism. The Z-axis slide plate 14 is mounted on the front surface of the bed 1 and is disposed along the direction of the rotary axis of the rotary table 3. The left wire arm 6', the right wire arm 7', the wire frame 8, the wire storage tube 8 and the wire slide plate 10 constitute a wire frame mechanism, and the wire frame mechanism is mounted on the Z-axis slide plate 14. The wire working portion 5 is disposed between the left wire arm 6' and the right wire arm 7'. The swivel axis of the rotary table 3 described above intersects the extension of the wire working portion 5 vertically.

In the first step, the annular workpiece is fixedly mounted on the rotary table, and its axis coincides with the rotary axis of the rotary table 2. In the second step, the device is started, the rotary table drives the circular workpiece to rotate around the rotary coordinate axis C, and the wire working portion 5 is reciprocated along the coordinate axis Z on the Z-axis slide 14 under the driving of the wire frame mechanism. Linear motion. The wire working portion 5 enters from the end face of the annular workpiece 4 and starts cutting.

The above-mentioned rotary motion of the rotary table 3 together with the circular workpiece 4 around the rotary coordinate axis C axis and the electrode wire working portion 5 are performed on the Z-axis slide plate 14 along the coordinate axis Z by the wire frame mechanism. The reciprocating linear motions are interrelated and controlled by a pre-programmed NC program, so that the desired curve can be cut on the annular wall of the toroidal workpiece and that all of the busbars of the cutting surface intersect perpendicularly to the axis of the workpiece being cut.

Others are the same as in the first embodiment.

Example 4

This embodiment is a case where the wire cutting processing method and apparatus of the circular workpiece proposed by the present invention are combined and then combined into a group tire type active mold ring. The manufacturing process of the prior art group tire type active mold ring is to separately manufacture a plurality of pattern segments, and then combine the pattern segments into a pattern circle in the circumferential direction. This process is complicated and effective. The rate is low, waste is large, and waste is large. According to the method proposed by the present invention, a complete pattern circle is integrally processed, as shown in FIG. The wire circle cutting processing method and device proposed by the present invention further cuts the pattern circle into a plurality of segments along its circumferential direction, as shown in FIG. Then the pieces are spliced into a complete set of tire-shaped tire mold ring, as shown in Figure 9. The group-type tire active mold ring can realize "non-porous exhaust", which belongs to high-precision mold.

Claims

claims

1. A method for wire cutting annular workpieces, which is characterized by including the following steps:

(1) Install the circular workpiece on the rotary table, and the axis of the circular workpiece coincides with the rotation axis of the rotary table.

(2) The rotary worktable drives the annular workpiece to rotate around its axis of rotation. At the same time, the wire rack mechanism drives the working part of the electrode wire to move along the axis of the annular workpiece. At this time, it is installed between the upper wire arm and the lower wire arm. The working part of the wire electrode enters the cutting workpiece from the end face of the annular workpiece. The rotation axis of the rotary table intersects perpendicularly with the extension line of the working part of the wire electrode. By controlling the linear motion of the working part of the wire electrode driven by the wire rack mechanism and The rotary motion of the circular workpiece driven by the rotary table completes the wire cutting processing of the circular workpiece.

2. A wire cutting processing device used in the wire cutting method of an annular workpiece according to claim 1, including a workbench and a wire rack mechanism, and the wire rack mechanism includes an upper wire arm, a lower wire arm, a wire rack and a wire storage cylinder, the wire electrode working part is arranged between the upper wire arm and the lower wire arm, and is characterized in that: the workbench is a rotary workbench, and the rotation axis of the rotary workbench intersects perpendicularly with the extension line of the wire electrode working part.

3. The wire cutting processing device according to claim 2, characterized in that: the rotary table is arranged vertically, and the rotation axis of the rotary table is in the horizontal plane.

4. The wire cutting processing device according to claim 2, characterized in that: the rotary table is set horizontally, and the rotation axis of the rotary table is perpendicular to the horizontal plane.

5. The wire cutting processing device according to claim 2, characterized in that: the rotary motion of the rotary table and the linear motion of the electrode wire working part driven by the wire frame are related to each other by a digital control program.

6. The wire cutting processing device according to claim 2, characterized in that: the rotary table is connected to a rotary mechanism, and the rotary mechanism includes a gear transmission mechanism, a synchronous belt transmission mechanism, a chain transmission mechanism, and a worm gear transmission. mechanism and direct drive motor mechanism.