微细电火花加工的底面轮廓模型及定长补偿方法  

Bottom Surface Profile of Single Slot and Fix-length Compensation Method in Micro-EDM Process

作　　者：裴景玉[1] 邓容[1] 胡德金[1] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200240

出　　处：《上海交通大学学报》2009年第1期42-46,共5页Journal of Shanghai Jiaotong University

摘　　要：针对三维金属微细结构的微细电火花加工,应用等损耗理论,采用分层加工方法建立了单道加工时底面形状随电极损耗变化的轮廓模型.在此基础上,提出定长补偿的方法,给出了补偿长度计算公式,并对底面轮廓模型以及定长补偿方法进行仿真分析.实验测定了微细条件下钨打钢的相对体积损耗比,进行了无补偿和定长补偿的实验加工.仿真及实验结果表明:无补偿时底面轮廓呈指数曲线,与实验结果相吻合;定长补偿方法加工的底面轮廓为恒定的波动曲线;随着补偿精度增加,底面轮廓的波动范围增大;在符合端面损耗理论的范围内,分层厚度越大,加工的相对误差越小.所提出的定长补偿方法提高了加工尺寸精度和形状精度.Based on laminated machining approach and uniform wear method, the bottom surface profile algorithm without compensation was deduced. The fix-length compensation process was proposed and its algorithm was given. Using this proposed approach, simulations of the bottom surface profile were performed. Some interesting conclusions were made on the results of the simulation. A series of experiments of micro slot were conducted to confirm the proposed compensation process and the algorithm is validated.

关 键 词：电火花加工 微细电火花加工 底面轮廓 补偿 

分 类 号：TG661[金属学及工艺—金属切削加工及机床]