铸铁结合剂金刚石砂轮ELID磨削硬质合金的性能研究  

Performance of cast-iron bonded diamond wheels in ELID grinding cemented carbide

作　　者：朱从容[1,2] 李伟[2] 于天明[2] 

机构地区：[1]浙江海洋学院机电工程学院机械系,舟山316004 [2]浙江工业大学机械制造及自动化教育部重点实验室,杭州310014

出　　处：《金刚石与磨料磨具工程》2008年第6期5-8,共4页Diamond & Abrasives Engineering

基　　金：国家自然科学基金(50775207);浙江省重中之重学科开放基金(56310202018)

摘　　要：硬质合金具有硬度高、强度好、耐腐蚀和耐磨损的特点,采用传统方法难以满足精密及超精密加工的技术要求。本文采用不同粒度的铸铁结合剂金刚石砂轮ELID镜面磨削硬质合金,得到了不同加工效率以及不同加工表面质量的硬质合金磨削效果,揭示了不同粒度砂轮其磨削性能变化的规律与作用。实验结果表明:在相同的进给量下,粗粒度砂轮的磨削效率较高,能更好地控制工件的尺寸精度。细粒度砂轮则磨削效率较低,但能获得优良的加工表面质量。砂轮表面的氧化膜在磨削过程中扮演非常重要的角色,磨粒的粒径与砂轮表面氧化膜厚度的比值大小决定了砂轮的磨削性能。氧化膜的形成又受到电解参数的影响,可以通过对电解参数的调节实现高效率高精度的ELID磨削。The cemented carbide has high hardness, high strength, high wear and corrosion resistance. So it is very difficult to meet the demand of precision and super-precision machining by conventional grinding. In this paper, the cast-iron bonded diamond wheels with different grain size are adopted in ELID （Electrolytic InProcess Dressing） grinding cemented carbide. Experiment results show that, under the same wheels with bigger grain size have higher grinding feeding, the efficiency, which could make the dimension accuracy of the workpiece controllable. On the contrary, the wheels with smaller grain size could get better ground surface quality, but they have lower grinding efficiency. The ELID grinding states are decided by the ratio of the grain size and the thickness of the oxide layer on the grinding wheel. The oxide layer plays an important role in grinding process. Its formation is affected by the electrolysis parameters, therefore, high precision and efficiency ELID grinding could be achieved with the proper electrolysis parameters.

关 键 词：铸铁结合剂金刚石砂轮 在线电解修整 磨削性能 表面质量 

分 类 号：TG74[金属学及工艺—刀具与模具] TQ164[化学工程—高温制品工业]