脉冲参数主动匹配式micro-EDM脉冲电源

孙术发¹, 刘美爽¹, 狄士春²

(1.东北林业大学 工程技术学院,150040 哈尔滨; 2.哈尔滨工业大学 机电工程学院,150001 哈尔滨)



摘要:

为了提高微细电火花加工(micro-EDM)效率,设计了一种脉冲参数主动匹配式micro-EDM脉冲电源．采用等能量加工的方法,对不同的脉冲匹配参数进行加工效率对比实验,设计了脉冲参数主动匹配式脉冲电源的结构、功能和控制策略,并进行了加工实验验证．结果表明: 选定合适的脉宽和脉间参数,使极间电容单次充电和单次放电,可获得最高的加工效率;该电源脉冲参数可根据极间电压和极间电容的大小自动调整;进行微小孔加工,加工连续性较好,加工效率和加工质量较高．利用该电源可进行微细加工,加工效率较传统电源有显著的提升,并能保证较高的加工质量．

关键词:  主动匹配式  微细电火花加工  脉冲电源  脉冲参数  加工效率

DOI：10.11918/j.issn.0367-6234.2014.07.020

分类号:V261.6

基金项目:中央高校基本科研业务费资助项目(DL13BB08).



Research of active pulse parameters matching micro-EDM pulse power supply

SUN Shufa¹, LIU Meishuang¹, DI Shichun²

(1. School of Engineering and Technology, Northeast Forestry University, 150040 Harbin, China; 2. School of Mechatronics Engineering, Harbin Institute of Technology, 150001 Harbin, China)

Abstract:

To improve the efficiency of micro-EDM, we designed a pulse power supply which can actively match pulse parameters for micro-EDM. By using the processing method of equal energy, we conducted the comparison experiments of processing efficiency in different pulse parameters, designed the structure, function and control strategy of this pulse power supply, and carried out a machining experiment. The results show that the highest machining efficiency can be obtained by selecting the appropriate pulse width and pulse interval, making the electrode capacitance charge and discharge for only one time, and the pulse parameter of the pulse power supply can automatically adjust to electrode voltage and capacitance. When machining the micro holes, the power supply has good processing continuity, high processing efficiency and quality, and when used for micro machining, the power supply can obviously improve the processing efficiency and get good processing quality compared to the traditional power supply.

Key words:  active matching, micro-edm, pulse power, pulse parameters, machining efficiency