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A Reciprocating Progressive Adaptive Feed Control Method for EDM Machine Tools

A technology for feed control and machining of machine tools, applied in adaptive control, electric machining equipment, general control systems, etc., can solve problems such as difficulty in distinguishing between normal discharge state and short circuit state, failure of feed control system, bending of electrode wire, etc. Achieve the effect of improving machining quality, improving machining surface quality, preventing over-feed and under-feed

Active Publication Date: 2016-04-06
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

This makes it difficult for the traditional feed control method to distinguish between the normal discharge state and the short circuit state, resulting in the complete failure of the feed control system, resulting in underfeed or wire bending or even wire breakage.

Method used

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  • A Reciprocating Progressive Adaptive Feed Control Method for EDM Machine Tools
  • A Reciprocating Progressive Adaptive Feed Control Method for EDM Machine Tools
  • A Reciprocating Progressive Adaptive Feed Control Method for EDM Machine Tools

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Embodiment Construction

[0039] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0040] A reciprocating progressive adaptive feed control method for EDM machine tools, which realizes adaptive feed control by controlling the reciprocating progressive feed motion between the tool electrode and the workpiece, and utilizes that the short circuit state always occurs after the normal discharge state According to the law, the gradual movement is performed in the no-load state, and the gradual movement is stopped after the normal discharge state is recognized, so as to avoid the EDM from falling into a short circuit state, and at the same time, the retreat movement in the reciprocating movement is used to increase the gap between the electrode and the workpiece to accelerate Chip removal, improve discharge conditions. In this way, there is no need to detect the short-circuit state during the feed control, and only need to detect the tw...

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Abstract

The invention discloses a reciprocating progressive self-adaptive feed control method for an electrical spark machine tool. A tool electrode in the electrical spark machine tool is controlled to perform a reciprocating progressive feed motion with a workpiece in an integral manner of reciprocating motion and progressive motion or in a separated manner of reciprocating motion and progressive motion so as to realize high-efficiency and high-quality electrical spark machining of a difficult-to machine material, particularly a semiconductor material, with a metal material. An appropriate discharge gap is automatically formed between the workpiece and the tool electrode, so that normal electrical spark discharge is promoted, continuous machining is ensured, and the method has the beneficial effects of quick chip removal and cooling, preventing the electrode from burning, improving the quality of machining surface, improving the machining efficiency, being wide in application range and the like.

Description

technical field [0001] The invention relates to a feed control method for an electric spark machining machine tool, which belongs to the field of numerical control technology and electric processing equipment. Background technique [0002] EDM is a special processing method that uses the electric erosion effect of the electric spark generated by the pulse discharge between the electrodes to process the material, also known as electric discharge machining or electric erosion machining. [0003] During EDM, the tool electrode and the material to be processed (that is, the workpiece) are respectively connected to the two poles of the pulse power supply, and the tool electrode is controlled to feed the workpiece through the gap automatic control system. When the gap between the two electrodes reaches a certain distance, the The applied pulse voltage breaks down the working fluid between the electrodes, generating a spark discharge. The local high temperature and high pressure g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23H1/02B23H7/20G05B13/02
Inventor 罗福源张琪游有鹏尹涓邱明波陈蔚芳
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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