基于不同磨粒的氮化硅陶瓷磨削特性研究  

Grinding Characteristics of Silicon Nitride Ceramics Using Multiple Abrasive Grains

作　　者：李霞[1] LI Xia(Department of Numerical Control Engineering,Baotou Iron and Steel Vocational and Technical College,Baotou 014010)

机构地区：[1]包头钢铁职业技术学院数控工程系,包头014010

出　　处：《宇航材料工艺》2022年第6期52-59,共8页Aerospace Materials & Technology

基　　金：内蒙古自治区高等学校科学研究项目(NJSY19235)。

摘　　要：采用多颗磨粒磨削仿真和实验相结合的方式研究磨削过程的磨削力、磨削温度和已加表面形貌。对比分析了多颗磨粒和传统单颗磨粒磨削模型在磨削特性上的差异性,并对多颗磨粒磨削仿真模型进行了验证。结果表明:当磨削速度减小、磨削深度增大时,多颗/单颗磨粒仿真与实验的磨削力均增大;当磨削速度和磨削深度增大,多颗/单颗磨粒仿真与实验的磨削温度均增大;当进给速度增大时,单颗磨粒仿真的磨削力减小、磨削温度先减小后增大,多颗磨粒仿真和实验的磨削力增大、磨削温度减小;多颗磨粒磨削时的磨削力和磨削温度大于单颗磨粒磨削时的力和温度;多颗磨粒仿真后工件表面形貌与实际加工后表面形貌相符。基于多颗磨粒磨削工程陶瓷的有限元仿真模型相比于单颗磨粒模型可更好地模拟实际加工情况。The grinding force,temperature and ground surface topography of the grinding process were studied by combination of simulation and grinding experiment with multi-abrasive grains. The differences in grinding characteristics between models of multi-abrasive-grain and traditional single-abrasive-grain were compared and analyzed. The simulation model of multi-abrasive-grain was verified by experiment. The results showed that by reducing grinding speed or increasing grinding depth,the grinding force in simulation and experiment of both models would increase. With increase of grinding speed or grinding depth,the grinding temperature in simulation and experiment of both models would rise. In simulation of the single-abrasive-grain model,the grinding force reduced with acceleration of feed rate,with the grinding temperature falling first before going up again. However,in simulation and experiment of the multi-abrasive-grain model,the grinding force increased with acceleration of feed rate,with grinding temperature going toward the opposite trend. The grinding force and grinding temperature in the multi-abrasive-grain model were higher than those of the single-abrasive-grain. The surface morphology of the workpiece after experiment using multiple abrasive grains was consistent with simulation result. The finite element simulation model using multiple abrasive grains to grind engineering ceramics gave closer to experiment result than using single abrasive grain.

关 键 词：单颗/多颗磨粒 工程陶瓷 ABAQUS仿真 磨削力 磨削温度 表面形貌 

分 类 号：TG580.61[金属学及工艺—金属切削加工及机床]