基于表面质量分析的聚晶金刚石刀具电火花放电磨削试验研究  

Experimental Study on Electrical Discharge Grinding of Polycrystalline Diamond Tools Based on Surface Quality Analysis

作　　者：贾云海[1] 郭建梅[1] 张勤俭 孙越[1] JIA Yunhai;GUO Jianmei;ZHANG Qinjian;SUN Yue(Beijing Institute of Electro-Machining,Beijing 100191,China;Mechanical Electrical Engineering School,Beijing Information Science and Technology University,Beijing 100192,China)

机构地区：[1]北京市电加工研究所,北京100191 [2]北京信息科技大学机电工程学院,北京100192

出　　处：《电加工与模具》2021年第4期21-25,共5页Electromachining & Mould

基　　金：北京市自然科学基金资助项目(3162013);北京市科学技术研究院“北科青年学者计划”项目(YS201905)。

摘　　要：以2、10μm两种粒度的聚晶金刚石作为研究对象,以工艺试验结合材料学测试作为分析手段,简单对比了盘状电极和线电极加工的表面质量,研究了金刚石粒度、电极极性、电极转速对精密电火花放电磨削聚晶金刚石的表面质量和材料去除率的影响。结果表明:采用负极性加工时,加工表面未出现多孔结构,表面质量好,放电蚀除无选择性;随着电极旋转线速度增加,聚晶金刚石材料的去除量也逐步增加,聚晶金刚石材料的表面粗糙度值先减少后增加;在电极线速度达80 m/min时,聚晶金刚石样件表面粗糙度值达到最小值,聚晶金刚石材料的去除量也趋于稳定。With 2 micro meter and 10 micro meter two kinds of grain size of polycrystalline diamond(PCD)as the research object,taking the machining test and material test as the analysis means,this paper simply compares the surface quality of disc electrode and wire electrode machining,and studies the influence of diamond particle size,electrode polarity and electrode rotation speed on the surface quality and material removal rate of precision electrical discharge grinding polycrystalline diamond.The results show that there is no porous structure on the machined surface with negative polarity machining,the surface quality is very well,and the discharge erosion has no selectivity.With the increase of electrode rotation linear speed,the removal amount of polycrystalline diamond material gradually increases,and the surface roughness of polycrystalline diamond material decreases first,then increases.When the linear velocity of the electrode reaches 80 m/min,the surface roughness of the sample reaches the minimum value,and the removal amount of the polycrystalline diamond material also tends to be stable.

关 键 词：聚晶金刚石刀具 电火花放电磨削 表面质量 蚀除坑 材料去除率 

分 类 号：TG661[金属学及工艺—金属切削加工及机床]