A micro electric discharge machining device and processing method for a slotted electrode that can be trimmed on-line

Abstract

The invention discloses a slotted electrode fine electric discharge machining device capable of online trimming and a machining method, and relates to the technical field of electrical machining. The working fluid system includes a working tank, a first filter, a first high-pressure pump and a nozzle. The working fluid system includes a There is a coolant system on one side, the coolant system includes a cooling tank, a second filter and a second high-pressure pump, and a transmission system is provided on one side of the coolant system, and the transmission system includes a servo motor, a motor shaft and a high-speed bearing; the motor shaft passes through the clip The head is connected with one end of the tool electrode, the bottom of the tool electrode is provided with a groove, and one side of the tool electrode is provided with a wire electrode for trimming the tool electrode. The invention breaks through the bottleneck of the existing particle-reinforced metal matrix composite micro-discharge machining technology. At the same time, the tool electrode of the new method has the ability to be trimmed online, as well as the excellent chip removal ability and the renewal ability of the working fluid. It is also expected to break through the existing metal matrix composite material. The manufacturing bottleneck of high precision and high surface quality in micro electric discharge machining of materials.

Description

technical field [0001] The invention relates to the technical field of electrical machining, in particular to a micro electric discharge machining device and a machining method for a slotted electrode capable of online trimming. Background technique [0002] Compared with traditional metal materials, metal matrix composites have higher specific stiffness and specific strength; compared with silicon carbide base materials, they have higher toughness and impact performance. Among metal matrix composites, aluminum matrix composites are the most widely used. Particle-reinforced aluminum matrix composites are composite materials in which aluminum or aluminum alloy is the continuous phase and ceramic particles are the second constituent phase. Aluminum matrix composites The performance depends on the characteristics, content, distribution, etc. of the matrix alloy and the reinforcing phase. Compared with matrix alloys, aluminum matrix composites have many excellent properties. ...

AI Technical Summary

Problems solved by technology

However, in the actual EDM, the size of the particle phase is uneven, and the electrodes such as slotting, edge trimming and polygon have limited chip removal ability for larger-scale particle phases. In addition, these electrodes generally have a large diameter. If online trimming , cannot maintain its dimensional characteristics, and is not suitable for micro-discharge machining

[0007] Some researchers have designed novel tool electrodes such as slotting, chamfering, hollow, and polygonal shapes, in an attempt to promote the discharge of debris such as reinforcement phase particles, improve the processing efficiency of particle-reinforced metal matrix composites, improve processing quality, and reduce electrode loss. etc., but the actual processing effect is not ideal

Since the reinforcement phase of metal matrix composites is generally tens of microns in size, its size exceeds the gap of electric discharge machining, and the reinforcement phase is difficult to be melted and removed by discharge energy, and the gap is easily blocked during processing, making it difficult to process

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