JPS6156830A - Electric discharge machining jig - Google Patents

Abstract

PURPOSE:To improve the accuracy and the efficiency of electric discharge machining of plural number of same works by arranging plural magnet blocks and positioning plates alternatively while further arranging positioning plates in perpendicular direction against the arranging direction. CONSTITUTION:Positioning plate is constructed with upper and lower blocks 5, 6 and 7, 8 and arranged on highly accurate base 11 alternatively with a magnet block 9 where the blocks 5, 7 and 6, 8 are coupled accurately through V-shaped endface. The positioning plate constructed with the blocks 7, 8 is provided in longitudinal direction. Such number of works 3 as the individual error is not accumulated are arranged while matching the endface with the positioning plate and fixed by applying magnetic force through operation of switch 10 for every magnet block 9. Then all upper blocks are removed to grind the upper face of the block 9 with high accuracy.

Description

[Detailed description of the invention] (Technical field) The present invention relates to a jig for electrical discharge machining.

('W Keitech) Figure 7 shows a conventional electrical discharge machining jig.
is a reference plate for positioning the workpiece 3 at a predetermined position,
2 is a magnet table for fixing the workpiece 3 by magnetic force, and 4 is a magnet switch for turning on and off the magnetic force of the magnet table 2. Further, this jig is provided within an electrical discharge machine.

However, in the conventional electrical discharge machining jig described above, (1) the workpiece 3 is directly attached to the magnetic table 2 in the electrical discharge machine, so the operating time ratio is reduced by the workpiece setting setup time. (Decrease in operating rate due to in-machine setup) (1) Since a plurality of workpieces 3 are arranged in series with reference to the reference plate 1, dimensional errors of individual workpieces are accumulated, leading to a decrease in processing accuracy. (Decrease in precision for multiple machining) ■Since the magnet switch is turned on after placing multiple workpieces 3 on the magnetic table 2, the position of each workpiece is likely to shift, resulting in poor positioning accuracy. Also, a high level of skill is required to perform the work accurately. There were drawbacks such as (decreased positioning accuracy for multiple items and poor operability).

(Object of the Invention) The present invention has been proposed in view of the above points, and its purpose is to improve the accuracy and efficiency of electrical discharge machining for multiple identical products. The objective is to provide jigs for this purpose.

(Disclosure of invention) DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to drawings showing embodiments.

1 to 5 show a first embodiment of the present invention, and FIG. 1 is a perspective view of the 11i electrical machining jig body;
Figure 2 shows the state in which multiple workpieces are attached, Figure 3
The figure shows the state in which the workpiece is set after adjusting the height.
Figure 4 shows the state in which a large workpiece is set, Figure 5
The figure is a conceptual diagram of integral grinding performed to maintain the accuracy of the jig.

In FIG. 1, 5 and 7 are the upper blocks of the positioning plate, and 6 and 8 are the lower blocks of the positioning plate.
The 'j'l determining plate is formed by Ii'7. .

And then there's the +IL deciding plate; Yo Magnet Pro.

are arranged on a base 11 having a high TiT degree, alternately with
Only the positioning plate formed by the block 728 is provided in a direction (longitudinal direction) perpendicular to the above arrangement direction. Na:
ta, 10 is a magnet switch of the magnet block 9. In addition, the upper blocks 5 and 7 and the lower block 6.8
can be connected to each other with high precision by their V-shaped end faces, as shown in Figure 2 or Figure 3 (select the upper blocks 5 and 7 according to the height of the workpiece, and tighten the bolts for fixing the positioning plate. It is used by passing a bolt through hole 12 and fixing it.

Figures 2 and 3 show the workpieces 3 actually fixed, and the workpieces are lined up with their end faces aligned with the positioning plate in such a way that errors of each workpiece do not accumulate, and each magnet block 9 is By operating the magnet switch 1G, a magnetic force is applied and fixed. Therefore, it is less likely that the position will shift when applying magnetic force to fix it. Furthermore, when setting a large workpiece 3 that cannot be fixed with one magnetic block, the upper block of the positioning plate between the magnetic blocks 9 is removed and used, as shown in FIG.

In addition, iJ! of the present invention! The ITi machining jig is configured to be separable from the h'i electric machining machine, and setting of the workpiece 3 is performed outside the electric discharge machine.

Figure 5 shows a method of integral grinding to maintain accuracy. By removing all the upper blocks of the positioning plate, the magnetic block 9 is removed by the grinding wheel 13.
It is possible to grind the top surface of the machine with high purity.

Next, FIG. 6 shows a second embodiment of the present invention, in which magnet blocks 1 are arranged and fixed on a base 22.
8 are provided with recessed grooves 19 and 20, respectively, and these recessed grooves 19
．． By engaging the positioning plates +4 and 16 having convex portions 15 and 17 that fit the height of the positioning plates 15 and 16 and changing the position of their engagement, the height can be adjusted without misalignment of the positioning plates.

(Effects of the Invention) As described above, in the present invention, the magnetic blocks and the positioning plates are alternately arranged in parallel in the ViD width, and the positioning plates 1- are also provided in the direction perpendicular to the arrangement direction. (a) The accuracy of electric discharge machining for multiple pieces can be improved.6 (b) The work set can be set up externally to improve the accuracy of determining the workpiece/7 position and the IJi electric machining operation speed can be improved.

(c) Since continuous machining of multiple pieces is possible, the continuous machining time of the electric discharge machine can be extended.

(d) The jig load maintenance period can be extended by making jig repair easier.

There are other effects.

[Brief explanation of drawings]

Figures 1 to 5 show a first embodiment of the present invention, with Figure 1 being a perspective view of the electrical discharge machining jig body, and Figure 2 showing a state in which a plurality of workpieces are attached. Figure 1:
Figure 3 shows the state in which the height is adjusted and the "C soak" is set, Figure 4 shows the state in which a large workpiece is set,
Fig. 5 is a conceptual diagram of integral grinding performed to maintain the precision of the jig, Fig. 6 is a perspective view showing the second embodiment, and Fig. 7 is a perspective view showing a conventional electric discharge machining jig. be. 5.7... Upper block of positioning plate, 6.8
・・・・・・Lower block of positioning plate, 9°18
... Magnet block, 10.21 ... Magnet switch, 11.22 ... Base, 12
・・・・・・Positioning plate lig regular bolt hole, 1
3...7iFFa whetstone. 14. IS...Positioning plate, 15.1
7...Protrusion of positioning plate, 19.20.
...Concave groove of magnet block Fig. 7 Procedure 111. Zheng Cao (Voluntary) December 21, 1980 Commissioner of the Patent Office Zhi 7'7 Gaku D. 1. Indication of the case 1982 Request for amendment No. 175697 2. Name of the invention Electric discharge machining jig 3. Amendment Relationship with the patent applicant case (!1113 + Matsushita Electric Works Co., Ltd. 4, representative)
Director 160 Address: 7th Floor 5, 2nd Mizota Building, 7-5-10 Nishi-Shinjuku, Shinjuku-ku, Tokyo Drawing subject to amendment 6, Contents of amendment

Claims (2)

[Claims] (1) A jig for electrical discharge machining, characterized in that a plurality of magnetic blocks and positioning plates are arranged side by side alternately, and a positioning plate is also provided in a direction perpendicular to the arrangement direction. (2) The electrical discharge machining jig according to claim 1, wherein the positioning plate has a variable height relative to the upper surface of the magnet block.