工件预加载温度对Ti-6Al-4V车削过程的影响

2019-06-19

作者：唐玲艳1，唐联耀1，李鹏南2，邱新义2，牛秋林2 单位：1广东科技学院；2湖南科技大学

摘要：通过对比仿真和试验的切削力、切屑形态和锯齿化程度验证了仿真模型的可行性，然后用仿真分析的方法研究了工件预加载温度对切屑形貌、切削力和切削温度的影响，获得了锯齿形切屑转变为带状切屑的临界工件预加热温度。结果表明：随着预加载温度的增加，切屑变形减少；在v=50m/min时，锯齿形切屑转变为带状切屑的临界预加载温度为150℃~200℃；切削速度v=110~170m/min时，临界预加载温度为250℃左右。

关键词：工件预加载温度；Ti6Al4V；有限元方法；锯齿形切屑

中图分类号：TG51；TH162文献标志码：ADOI：10.3969/j.issn.1000-7008.2019.06.013

Effect of Workpiece Preloading Temperature on Ti6Al4V Turning Process

Tang Lingyan，Tang Lianyao，Li Pengnan，Qiu Xinyi，Niu Qiulin

Abstract:The feasibility of the simulation model is verified by comparing the cutting force，chip form and saw tooth degree of the simulation and the cutting experiment.Then the influence of the workpiece preloading temperature on chip morphology，cutting force and cutting temperature is studied by simulation analysis method.The critical preheating temperature of the workpiece from serrated chip to strip chip is obtained.The results show that the chip deformation decreases with the increase of the preloading temperature.When v=50m/min，the critical preloading temperature for saw tooth chips to strip chips is between 150℃-200℃，and the critical preloading temperature for cutting speed v=110-170m/min is about 250℃.

Keywords:workpiece preloading temperature；Ti6Al4V；finite element method；saw tooth chip