SiC磨粒辅助钛合金EDM和ECM并行加工的工艺参数优化  

Parameters Optimization of SiC Abrasive Assisted Simultaneous EDM and ECM Machining of Titanium Alloy

作　　者：栾晓声 孟建兵[1] 胡益忠 董小娟[1] 李丽[1] 曲凌辉 张宏伟 LUAN Xiaosheng;MENG Jianbing;HU Yizhong;DONG Xiaojuan;LI Li;QU Linghui;ZHANG Hongwei(School of Mechanical Engineering,Shandong University of Technology,Zibo 255000,Shandong,China)

机构地区：[1]山东理工大学机械工程学院,山东淄博255000

出　　处：《机械科学与技术》2021年第10期1549-1554,共6页Mechanical Science and Technology for Aerospace Engineering

基　　金：山东省自然科学基金面上项目(ZR2018MEE028)。

摘　　要：针对钛合金的难加工特点,单纯EDM、ECM的局限性以及EDM和ECM串行加工的低效率问题,在低电阻去离子水中加入碳化硅磨粒,开展了磨粒辅助作用下的EDM和ECM并行复合加工。将材料去除率、电极损耗率和表面粗糙度作为评价指标,通过正交试验和灰关联度分析,将多工艺目标转化为单一评价指标,得到峰值电流、脉冲宽度、磨粒浓度和放电电压主要工艺参数的优化组合,并进行了试验验证。结果表明:峰值电流为1.5 A、脉冲宽度为30μs、磨料浓度为5 g/L、放电电压为40 V的工艺参数组合所得到的电极损耗率、表面粗糙度和表面形貌都得到明显改善。In view of the difficult machining characteristics of titanium alloy,the limitations and low efficiency of EDM&ECM serial machining,silicon carbide abrasive was added into the deionized water with low resistance,and simultaneous EDM and ECM machining assisted by abrasive was carried out.Taking material removal rate,tool wear rate and surface roughness as the evaluation indexes,the multi process objectives are transformed into a single evaluation index by using the orthogonal test and grey correlation analysis,and the optimized combination of main process parameters,such as peak current,pulse on time,abrasive concentration and discharge voltage,is obtained and verified via experiments.The results show that the tool wear rate,surface roughness and surface morphology are obviously improved at a peak current of 1.5 A,pulse on time of 30μs,abrasive concentration of 5 g/L and discharge voltage of 40 V.

关 键 词：钛合金 电火花加工 并行加工 参数优化 

分 类 号：TG661[金属学及工艺—金属切削加工及机床] V261.6[航空宇航科学与技术—航空宇航制造工程]