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在考虑工件材料物理性能与温度的非线性关系情况下,采用三角形热源模型对一些典型的磨削工况进行了三维有限元仿真,获得了工件的温度分布。分析了热源模型、磨削液和工件材料的变物性等因素对磨削温度场的影响,得出了一些重要结论。利用热电偶法测量了磨削温度,发现有限元仿真值与实验测量值相当吻合;采用表面粗糙度仪探测了工件轮廓,验证了湿磨时磨削温度沿工件宽度方向的变化规律。
Taking into account the nonlinear relationship between the physical properties of the workpiece material and the temperature, the triangular heat source model was used to simulate some typical grinding conditions and obtain the temperature distribution of the workpiece. The influence of heat source model, grinding fluid and the material properties of the workpiece on the grinding temperature field are analyzed. Some important conclusions are drawn. The thermocouple method was used to measure the grinding temperature. The simulation results of the finite element method were in good agreement with the experimental ones. The surface profile of the workpiece was probed with a surface roughness meter. The variation of the grinding temperature along the width of workpiece was verified.