不同CBN砂轮高速加工PTMCs的磨削性能对比  

Comparing performance of CBN grinding wheels in high-speed grinding particulate reinforced titanium matrix composites

作　　者：李征 刘莹[3] 丁文锋[2] LI Zheng;LIU Ying;DING Wenfeng(School of Aeronautical Engineering, Zhengzhou University of Aeronautics, Zhengzhou 450046, China;College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;Henan Polytechnic, Zhengzhou 450046, China)

机构地区：[1]郑州航空工业管理学院航空工程学院,郑州450046 [2]南京航空航天大学机电学院,南京210016 [3]河南职业技术学院,郑州450046

出　　处：《金刚石与磨料磨具工程》2020年第5期5-10,共6页Diamond & Abrasives Engineering

基　　金：国家自然科学基金资助项目(51775275);河南省高等学校重点科研项目(21A460025)。

摘　　要：为分析CBN砂轮高速磨削颗粒增强钛基复合材料(particulate reinforced titanium matrix composites,PTMCs)的磨削性能,采用3种CBN砂轮开展PTMCs的高速磨削试验,对比研究其磨削力、温度、表面粗糙度及表面形貌。结果表明:相对陶瓷砂轮,钎焊砂轮的法向磨削力减小16.2%~40.4%、切向力减小25.2%~44.4%,磨削温度降低了26.0%~74.3%;相对电镀砂轮,钎焊砂轮的法向磨削力减小7.1%~31.1%、切向力减小23.3%~31.1%,磨削温度降低了14.5%~58.9%;钎焊砂轮在加工中表现出了最低的磨削力和温度,获得了最低的表面粗糙度和最好的表面质量,表面粗糙度可以达到0.60~0.77μm。因此,在高速磨削PTMCs时,钎焊砂轮更具优势。To take advantages of high-speed grinding to improve the high-efficiency precision machining of particulate reinforced titanium matrix composites(PTMCs),it is necessary to further understand the grinding performance of high-speed grinding PTMCs with CBN grinding wheels.High-speed grinding PTMCs was carried out with three kinds of CBN grinding wheels,and the grinding forces,the temperature,the ground surface roughness and the ground surface topography were comparatively investigated.The results display that grinding force,temperature and ground surface roughness obtained with the brazed grinding wheel are the best,compared with those of vitrified or electroplated grinding wheels.Its grinding force and temperature are 16.2%-40.4%(normal),25.2-44.4%(tangential)and 26.0%-74.3%lower than those of vitrified wheels,and 7.1%-31.1%(normal),23.3-31.1%(tangential)and 14.5%-58.9%lower than those of electroplated wheels.The roughness of surface ground by brazed wheel is 0.60–0.77μm.Therefore,the brazed grinding wheel has more advantages in high-speed grinding of PTMCs.

关 键 词：PTMCs 磨削力 磨削温度 表面粗糙度 

分 类 号：TG58[金属学及工艺—金属切削加工及机床]