Spindle device for processing micro-hole electric spark based on magnetic levitation servo drive

Abstract

The invention relates to a spindle device for processing a micro-hole electric spark based on a magnetic levitation servo drive. A magnetic coupling inner rotor is fixedly connected with an upper part of a hollow mandrel; a rotor end cover is arranged on the hollow mandrel at an upper part of the magnetic coupling inner rotor; a flexible lead enters in a cavity of the hollow mandrel through the rotor end cover; an inner rotor permanent magnet is arranged on the magnetic coupling inner rotor; a radical eddy current displacement sensor is fixed inside an upper shell; a lower end of an insulatedturntable is arranged on the upper shell at an inner side of an angular contact ball bearing; a magnetic coupling outer rotor is fixed on an upper part of the insulated turntable; and an outer rotor permanent magnet is fixed on the magnetic coupling outer rotor. According to the invention, the spindle device provided by the invention is helpful for discharging an electrolytic corrosion product intime and improving discharge condition of a discharge gap; and is helpful for improving the quality and efficiency of electric spark micro-hole processing. The spindle device can realize processing of micro-straight holes, taper holes and stepped holes of hole diameters phi ranging from 100mum to 300mum according to different processing requirements.

Description

technical field [0001] The invention relates to the technical field of micro-hole (micro) electric discharge machining, in particular to a spindle device for micro-hole electric discharge machining with multiple degrees of freedom controllable based on magnetic levitation servo drive. Background technique [0002] Micro-processing technology is an important development direction of modern manufacturing technology, and micro-EDM technology is one of the effective means to realize micro-processing technology. At present, micro-EDM technology has good application prospects in the fields of aerospace, medical treatment, molds, microelectronic devices, biotechnology, micro-sensors and micro-electrical appliances. In the processing of microstructure parts such as injection molds, printed circuit board through-hole punching dies, fuel nozzles, water jet nozzles, and inkjet print heads. Since the diameter of the fuel nozzle hole is generally between φ0.1 ~ φ0.2mm, and it is in a hi...

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Problems solved by technology

[0005] The present invention aims to solve the problem of low spindle servo response frequency, slow response speed, poor real-time tracking performance, frequent no-load short circuit in the discharge gap, low effective discharge rate, short electrode length, fast loss and frequent replacement in the existing micro-hole EDM process. , the problem of low processing efficiency, and the problems of the existing micro-hole EDM method in processing complex-shaped holes and microstructures, and then provide a spindle device for micro-hole EDM based on magnetic levitation servo drive

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