硬脆性材料在磨削过程中的热瞬态仿真分析

Transient thermal analysis for grinding fabrication of hard and brittle material

硬脆性材料在磨削过程中的加工质量和效率成为目前制约硬脆性材料应用的主要问题之一,如何在加工工艺环节提高生产效率和加工质量成为亟待解决的问题,制约问题解决的主要原因是加工效率在很大程度上会引起加工质量变差,在提高加工效率的同时保证良好的加工质量极其困难。主要从影响加工质量的因素之一磨削温度入手,以硬脆性材料中的碳化硅、氧化铝为例,利用有限元分析软件对硬脆性材料的磨削过程进行热瞬态分析,分析了在不同的磨削加工参数(砂轮转速、磨削深度和工件速度)即不同加工效率时大口径碳化硅工件和氧化铝工件的最高温度及其变化曲线,并横向对比了氧化铝材料和碳化硅材料在同等磨削加工参数时的磨削热状态。针对性地研究了硬脆性材料在磨削加工过程中的一些特性,为硬脆性材料的加工工艺提供参考。

One of the major problems that restricts the widely use of hard and brittle materials is the quality and efficiency of fabrication. To deal with this,improving fabricaiton efficiency and quality of hard and brittle materials needs to be quickly solved. To a large extent, high efficiency could imply the quality may get worse. Keeping up high efficiency and good quality seems to be contradictory in the meantime. Since the grinding thermal situation was one of the key elements that could affect the fabrica-tion quality, this article aims to analyze the thermal situation in the process of fabrication of carbon dioxide and aluminum oxide by studying the relationships between grinding temperature and grinding parameters which include grinding wheel linear velocity, grinding depth and workpiece speed. In the meanwhile,it compared the thermal results between carbon dioxide and aluminum oxide in purpose of providing useful information and reference for fabrication.