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为了获得铣齿切削时切削区域的温升分布,在分别对铣削热产生和传出的机理,以及刀具和工件之间几何关系分析的基础上,得出包含对应虚拟镜像热源的热源模型。考虑到剪切面热源和刀屑接触面摩擦热源对工件、切屑和刀具的温升作用效果的不同,根据傅里叶导热定律推导出顶刃切削时相应热源的温升计算公式,分别对3者的温升分布进行计算可以获得整个切削区域的温升分布。结果表明,铣削过程中温度随切削的深入而升高,在不改变工件和刀具材料的情况下,进给速度是影响切削温度的主要因素,改变刀盘转速对温升的影响不大。
In order to obtain the distribution of temperature rise in the cutting region during milling, the heat source model including the corresponding virtual mirror heat source is obtained based on the analysis of the heat generation and the outgoing mechanism of the milling cutter and the geometric relationship between the cutter and the workpiece. Considering the difference between the effect of frictional heat source on shear surface and the frictional heat source of chip contact surface on the temperature rise of workpiece, chip and tool, the formula of temperature rise of corresponding heat source is deduced according to the law of Fourier thermal conductivity, Temperature distribution of the person can get the temperature distribution of the entire cutting area. The results show that the temperature increases with the depth of milling during the milling process. The feed speed is the main factor affecting the cutting temperature without changing the workpiece and the tool material. Changing the cutter speed has little effect on the temperature rise.