电火花修形砂轮对ELID磨削效果影响的实验研究  

Effect of EDM turned diamond grinding wheel on ELID grinding quality

作　　者：关佳亮[1] 孙志杰[1] 杨亚兰[1] 赵增强[1] 舒行军[2] 

机构地区：[1]北京工业大学机电学院,北京100124 [2]中国工程物理研究院机械制造工艺研究所,绵阳621900

出　　处：《金刚石与磨料磨具工程》2009年第4期44-47,共4页Diamond & Abrasives Engineering

基　　金：国家自然科学基金资助项目(11001011200601)

摘　　要：本文对经电火花精修形、粗修形后形成硬质层和去除修形形成硬化层的金属结合剂超硬磨料砂轮进行对比实验,研究了三种砂轮的ELID电解曲线和电解后的砂轮表面形貌,分析了不同砂轮被电解后对加工工件的表面粗糙度的影响。实验结果表明:电火花修形后砂轮,表面硬质层阻值较大,不宜直接用于ELID精密镜面磨削加工;电火花修形能够提高砂轮表面的强度和硬度,能够提高砂轮的耐磨性;为保证砂轮基体受电火花淬火影响最小,形成硬质层最薄,电火花精修形时需选用较小的占空比。A comparative experimental research was conducted among three kinds of metal bonded diamond grinding wheels, which are precision turned wheels and rough turned wheels by EDM with hardened layer, and wheels with the hardened layer removed. Meanwhile, the ELID electrolysis curves of the three kinds of wheels and the surface morphology of the wheel after electrolyzed were studied, and the effect of differently electrolyzed wheels on the surface roughness of machined workpiece was also analyzed. Experimental results showed that the wheels turned by EDM are not suitable for immediate application in ELID precision mirror grinding due to their large resistance of surface hardened layer. hardness and wear resistance of wheel. Low duty However, EDM turning can enhance the surface strength, ratio should be chosen to ensure the least effect of EDM quenching on wheel which then to get the hardened layer.

关 键 词：在线电解修整磨削 电火花修形 表面硬化层 

分 类 号：TG58[金属学及工艺—金属切削加工及机床]