微砂轮电化学放电修整技术  

Electrochemical Discharge Dressing for Micro-grinding Tool

作　　者：魏臣隽[1,2] 沈艳 许黎明[1] 陈振中 

机构地区：[1]上海交通大学机械系统与振动国家重点实验室,上海200240 [2]上海无线电设备研究所,上海200090

出　　处：《上海交通大学学报》2017年第5期534-541,共8页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金项目(51075273;50775143)资助

摘　　要：基于电化学放电加工的电极损耗原理,提出一种新的微砂轮修整工艺——电化学放电修整方法.阐述了其修整原理,同时,通过对比修整前后微砂轮的表面形貌、磨削力和工件表面质量来评估修整效果,通过微磨削试验来分析加工工艺参数对修整效果的影响.结果表明:修整后,微砂轮的磨削力和工件表面粗糙度显著降低;使用32V电源电压、质量浓度为300g/L的NaOH溶液修整后,微砂轮的法向磨削力和工件表面粗糙度最低.通过电化学放电修整可以显著改善微砂轮的磨削状态,提高加工效率和工件表面质量,延长微砂轮使用寿命.A novel dressing technique, called electrochemical discharge dressing （ECDD）, was proposed based on the mechanism of electrode wear in electrochemical discharge machining. The principle of ECDD was presented. The dressing performance was evaluated through comparison of surface morphology, grinding force and surface quality before and after grinding. The experiments were conducted to under- stand the impact of process parameters on dressing effect. The grinding force and surface roughness were found to decline. The normal grinding force and surface roughness were minimum when the voltage was 32 V and eletrolyte mass fraction was 300 g/L. It was prooved that tool condition was improved due to ECDD, i. e. , the machining rate, surface quality and tool life increased significantly.

关 键 词：微砂轮 电化学放电 修整 微磨削 

分 类 号：TG661[金属学及工艺—金属切削加工及机床]