Parameters On-line Measurement and Control and Optimization Experiments of Ultrasonic Compound Electric Machining

doi:10.3901/JME.2018.17.255

Abstract

Abstract: Ultrasonic compound electric machining technology combines ultrasonic, electrolysis and discharge functions organically. It is an effective method for micro machining difficult-to-machine materials and special-shaped parts. However, the machining efficiency and accuracy are often difficult to be stable because of many complex parameters affecting the processing process. Analying the parameter variation characteristics of machine, electricity and liquid in compound electric machining system and determining all kinds of parameter measurement, control or compensation strategies. The various precision sensors, digital storage oscilloscopes and PCI-1706U synchronous data acquisition cards are used to detect and process parameters on line. Using central computer, STM32 single chip computer and digital potentiometer to adjust the ultrasonic amplitude in real time, set the working parameters of the laser micro displacement sensor and adjust the electric machining power interval. According to evaluation machining state of inter-polar electrical parameters, the electrical parameters optimally and in real time are adjusted. Using virtual instrument technology and LabVIEW platform, the real-time monitoring and optimization software of ultrasonic compound electric machining is developed. Using the control and optimization machining system, the micro structure ultrasonic compound electric machining tests is performed. The results show that the system works stably and can realize the ultrasonic compound synchronous machining at the small gap. It can ensure the machining accuracy, at the same time, the processing efficiency is improved remarkably.

Key words: compound electric machining, micro-structure processing test, on-line parameters detection, parameters optimization, ultrasonic frequency vibration

CLC Number:

V261

ZHAO Qingqing, DENG Zhengquan, ZHU Yongwei. Parameters On-line Measurement and Control and Optimization Experiments of Ultrasonic Compound Electric Machining[J]. Journal of Mechanical Engineering, 2018, 54(17): 255-264.

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