Device and method for ultrasonic vibration assisted electrical discharge grinding

Abstract

The invention discloses an ultrasonic-vibration-assisted discharging and grinding device. The ultrasonic-vibration-assisted discharging and grinding device comprises an ultra-precision grinding machine, a pulse power supply, a pulse discharging parameter collection system, an ultrasonic vibration assistance device and a data processing and regulation system. The ultra-precision grinding machine is provided with a diamond abrasive wheel. The ultrasonic vibration assistance device is fixed to a working table of the ultra-precision grinding machine and used for installing a workpiece and making the workpiece vibrate in the axial direction. The data processing and regulating system is sued for analyzing vibration parameters of the ultrasonic vibration assistance device and obtaining pulse discharging parameters and grinding parameters in real time. The discharging parameters of the pulse power supply, the grinding parameters of the grinding machine and the vibration parameters of the ultrasonic vibration assistance device are regulated in a self-adaption manner through a grinding machine CNC system of the ultra-precision grinding machine so that ultrasonic-vibration-assisted discharging and grinding can be achieved. The invention further provides an ultrasonic-vibration-assisted discharging and grinding method. The gap between grinding particles of the abrasive wheel and the workpiece is regulated through axial ultrasonic vibration, and therefore spark discharging can be uniform, the phenomenon of intermittent discharging is reduced, discharging machining is improved, and the workpiece machining quality can be better.

Description

technical field [0001] The invention relates to a device and method for ultrasonic vibration assisted electric discharge grinding, which belongs to the field of precision component manufacturing of conductive hard and brittle materials. technical background [0002] At present, a single grinding process cannot meet the production and processing requirements of precision parts and special materials. Adopting a composite processing method such as the combination of pulse EDM and grinding can greatly reduce the grinding force, improve surface quality, and improve processing efficiency. However, due to the unstable effect of pulse EDM itself, no-load pulses and short-circuit pulses are caused. The present invention mainly relates to a device and method for ultrasonic vibration assisted electric discharge grinding, because current technology shows that the increase of grinding force and electric spark short circuit rate may be caused by grinding dust obstruction, adhesion on the ...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the problems of no-load pulse and short-circuit pulse caused by the unstable electric spark pulse discharge in the prior art, as well as the accumulation of chips still existing in electric discharge grinding, and to provide an ultrasonic vibration-assisted electric discharge grinding device and method

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