切削参数对20CrMnTi钢铣削温度影响的研究

Study on Effect of Cutting Parameters on Cutting Temperature of Milling 20CrMnTi Steel

20CrMnTi淬硬钢进行铣削加工时,通常会因切削温度过高导致刀具磨损加重,从而影响加工质量和加工效率,因此本文采用仿真和试验相结合的方法,研究切削参数对切削温度的影响。设计正交试验,对切削温度仿真结果进行极差分析,得出切削参数对切削温度的影响程度。为验证所建立仿真模型的合理准确性,选择与加工仿真相同的切削参数,将仿真与试验数据进行对比分析,验证了仿真模型的合理性。基于此仿真模型,进一步采用单因素试验法进行铣削仿真,得到铣削20CrMnTi淬硬钢时切削参数对切削温度的影响规律。研究结果表明:切削参数对切削温度的影响程度由大到小依次为切削速度、每齿进给量和背吃刀量,切削温度随切削速度、背吃刀量和每齿进给量的增大而增大。

When performing milling of 20CrMnTi hardened steel,high cutting temperature usually aggravates tool wear,thus affecting machining quality and machining efficiency.Therefore a combination of simulation and experiment to study the effect of cutting parameters on cutting temperature is proposed.An orthogonal test is designed to perform extreme difference analysis on the cutting temperature simulation results to derive the degree of influence of cutting parameters on cutting temperature.In order to verify the reasonable accuracy of the created emulation model,the same cutting parameters as the machining simulation are selected,and the simulation and test data are compared and analyzed to verify the reasonableness of the emulation model.Based on this emulation model,further milling simulation is carried out by the single factor test method to obtain the effect of cutting parameters on cutting temperature when milling 20CrMnTi hardened steel.The results show that the cutting parameters affect the cutting temperature in descending order of cutting speed,feed per tooth and back engagement.Cutting temperature increases with increasing cutting speed,back engagement and feed per tooth.