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Electric spark discharge machining method of free electrodes and equipment thereof

A technology of electrical discharge machining and electric spark, which is applied in the direction of electric processing equipment, metal processing equipment, electrode manufacturing, etc., can solve the problems of tool electrode loss, workpiece material removal, tool electrode can not be reused, etc., to improve discharge conditions and uniform size , Reduce the effect of abnormal discharge

Active Publication Date: 2016-12-21
江苏美通导体科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: in the process of processing, not only the workpiece material will be removed, but the tool electrode will also generate corresponding loss, so that the tool electrode cannot be reused

Method used

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  • Electric spark discharge machining method of free electrodes and equipment thereof
  • Electric spark discharge machining method of free electrodes and equipment thereof
  • Electric spark discharge machining method of free electrodes and equipment thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0026] An electric spark discharge machining method of free electrodes, the workpiece 1 and the tool electrode 2 are respectively connected to the positive and negative poles of the pulse power supply 3, the free electrodes 4 with the same shape and uniform size move on the surface of the tool electrode 2, during the electric discharge machining process , the workpiece 1, the tool electrode 2 and the free electrode 4 are all immersed in the insulating medium, and the free electrode 4 is powered by the tool electrode 2, and the moving free electrode 4 generates electric spark discharge with the workpiece 1 to be processed, and then removes the surface of the workpiece 1 material, and finally copy the shape of the tool electrode 2 on the workpiece 1 to realize the processing of the part.

[0027] Such as figure 1 As shown, the EDM equipment of the free electrode for realizing the method includes a working medium tank, a workpiece 1, a pulse power supply 3 and a tool electrode 2,...

Embodiment 2

[0030] Such as figure 2 As shown, the workpiece 1 is placed above the tool electrode 2, the workpiece 1 is connected to the negative pole of the pulse power supply 3, and the tool electrode 2 is connected to the positive pole. The material types of the workpiece 1, the tool electrode 2 and the spherical free electrode 4 are stainless steel, brass and No. 45 steel respectively, and the radius of the spherical free electrode 4 is 2 cm. The working medium is special oil for EDM, the open circuit voltage is 120V, the peak current is 25A, the pulse width is 80μs, and the pulse interval is 40μs. The moving magnetic field generated by the magnetic control device 5 drives the free electrode 4 to reciprocate back and forth, so that the free electrode 4 can It moves on the entire surface of the tool electrode 2 at a speed of 0.05m / s. The detection servo system 8 of the EDM equipment controls the feed device 9 to drive the workpiece 1 close to the tool electrode 2 and check the gap to ...

Embodiment 3

[0032] An electric spark discharge processing equipment with free electrodes, comprising a working medium tank, a workpiece 1, a pulse power supply 3 and a tool electrode 2, the workpiece 1 and the tool electrode 2 are respectively connected to the positive and negative poles of the pulse power supply 3, and the free electrodes 4 have the same shape, The size is uniform, the tool electrode 2 is located below the workpiece 1, the surface of the tool electrode 2 has an inclination, and the free electrode 4 uses the inclination of the surface of the tool electrode 2 to move from a high point to a low point on the surface of the tool electrode 2 under the action of its own gravity. After the point is recovered by the free electrode recovery device, the free electrode recovery device retransmits the recovered free electrode 4 to the high point on the surface of the tool electrode 2, so that the surface of the tool electrode 2 is continuously moved by the free electrode 4.

[0033]Th...

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Abstract

The invention relates to an electric spark discharge machining method of free electrodes and equipment thereof. A work-piece and a tool electrode are connected to a positive pole and a negative pole of a pulse power source respectively, the free electrodes move on the surface of the tool electrode, the work-piece, the tool electrode and the free electrodes are all immersed into insulating media in the electric spark machining process, the tool electrode is used for charging the free electrodes, the moving free electrodes and the work-piece to be machined generate electric spark discharge, then materials on the surface of the work-piece are removed, finally the shape of the tool electrode is copied on the work-piece, and part machining is realized. The method and the equipment have the beneficial effects that loss of the tool electrode is effectively avoided, and therefore the manufacturing cost and the manufacturing time of the tool electrode are greatly reduced. The method and the equipment are especially suitable for machining the parts with complex shapes. Meanwhile, because the free electrodes are always in the motion process, the inter-electrode discharge condition can be effectively improved, abnormal discharge can be reduced, and the machining efficiency and the machining quality can be improved.

Description

technical field [0001] The invention relates to a free electrode electric spark discharge machining method and equipment thereof. Background technique [0002] EDM is to continuously generate pulsed electric sparks between the workpiece and the tool electrode, and to etch off the excess material on the workpiece by the local and instantaneous high temperature generated during the discharge, so as to realize the processing of the parts. However, during the machining process, not only the workpiece material will be removed, but also the tool electrode will have a corresponding loss. [0003] Since the production of tool electrodes is relatively complicated, especially some tool electrodes with complex curved surfaces, in order to increase the number of times of use and improve the processing quality. A large number of scholars at home and abroad have done a lot of research on reducing the loss of tool electrodes, and proposed some methods to reduce the loss of tool electrodes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23H1/04
CPCB23H1/04
Inventor 张伟王辉
Owner 江苏美通导体科技有限公司
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