平面铣削刀具前刀面瞬态切削温度的研究

刀具切削温度对刀具寿命、刀具磨损等有重要影响。因此在实际加工之前预测出刀具温度,对合理选择切削参数、优化数控程序等均具有重要意义。平面铣削等断续切削过程的热条件不同于车削等连续切削过程。用数学物理方法建立了平面铣削过程刀具的一维传热学模型,用解析的方法预测平面铣削过程中刀具前刀面的温度分布,考虑了刀具切出时空气强化对流散热对刀具前刀面温度的影响。结果表明,刀具切入时间和切出时间对刀具温度有较大影响。用文献中断续车削刀具温度实验数据对铣削刀具前刀面温度的传热学预测模型进行了验证,结果表明二者趋势一致,但平面铣削预测的刀具温度略低于断续车削的刀具温度。

Modeling and analysis of transient cutting temperatures on tool rake face in peripheral milling

Tool temperatures have major impacts on tool life,tool wear,etc.Hence,a reliable tool temperature predicting has an important significance for properly selecting cutting parameters,optimizing the NC programs.Thermal conditions in interrupted cutting processes such as peripheral milling differ from those in continuous cutting processes such as turning.A novel one-dimensional heat transfer model of the tool temperatures on tool rake face during peripheral milling is presented using mathematical physics methods.Temperature distribution on the tool rake face during peripheral milling is predicted using the proposed analytic methods.The enhanced air convection cooling effect of idle cutting time on tool temperatures is taken into account.The results show that tool temperatures depend primarily on cutting time and idle cutting time.The model is verified with intermittent turning experimental tests reported in the literature.Temperatures of peripheral milling is however slightly lower than those in intermittent turning.