线电极电火花磨削运丝系统设计及线电极有效加工区位置波动的试验  

Design of a Wire Transport System and Position Fluctuations of Discharge Area in Wire Electrode in WEDG

作　　者：王燕青[1,2] 白基成[1] 朱国征[1] 张恒[1] 

机构地区：[1]哈尔滨工业大学机电工程学院,哈尔滨150001 [2]中航通飞研究院有限公司第四研究室,广东珠海519030

出　　处：《上海交通大学学报》2015年第1期24-30,共7页Journal of Shanghai Jiaotong University

基　　金：国家高技术研究发展计划(863)项目(2007AA04Z345);国家自然科学基金资助项目(51175120)

摘　　要：为了减小线电极电火花磨削中线电极有效加工区位置的波动,建立了运丝系统多自由度振动模型,分析了滚轮的直径和质量、相邻滚轮间线电极的材料、长度和直径对运丝系统振动固有频率的影响,将仿真分析结果用于指导运丝系统设计,以提高运丝系统的固有频率并减小线电极有效加工区发生振动的频率;通过试验研究了线电极运丝速度、线电极在导向轮上的包角及线电极张力对线电极有效加工区位置波动的影响规律,并用于确定最佳加工参数;同时,利用所设计的线电极磨削装置加工出直径为(50±1)μm的微细轴.结果表明,所设计的线电极磨削装置及试验获得的最佳加工参数可用于高尺寸精度的微细轴加工.A multi-degree of freedom vibration model for wire transport system was developed to analyze the effects of material and diameters of wire electrode, diameters and mass of wheels, and the length of wire electrode between two adjacent wheels on the natural frequency of the wire transport system. And the obtained conclusions through simulation analysis were used to increase the natural frequency of the wire transport system, thereby reducing the possibility of resonance and decreasing the position fluctuations of discharge area. The effects of wire running speeds, wrap angles of wire electrode on wheel guide, and wire electrode tension on the position fluctuation rang of discharge area were experimentally studied. Finally, a micro shaft with a diameter of （50±1） μm was successfully fabricated. The experimental results show that the designed wire electrical discharge grinding（WEDG） device and optimal parameters obtained through experimental study can be used to process micro shafts with high dimensional accuracy.

关 键 词：线电极电火花磨削 运丝系统 多自由度振动模型 有效加工区 微细轴 

分 类 号：TG661[金属学及工艺—金属切削加工及机床]