基于冰冻装卡的镁锂合金零件铣削工艺参数对切削温度的影响与仿真验证

Effects of Milling Process Parameters on Cutting Temperature of MG-Li Alloy Parts Based on Frozen Loading Card and Simulation Verification

本文以镁锂合金材料的卫星机箱壳体零件为对象,研究不同铣削工艺参数加工镁锂合金壳体时冰冻装卡方式降低壳体温度效果。借助冰冻盘和红外测温仪进行镁锂合金壳体铣削加工实验,探索冰冻装卡工艺方法对镁锂合金壳体零件及切削区域的温度影响效果。结果表明,主轴转速n在1500~3500r/min、背吃刀量ap在0.3~0.7mm、进给量F在300~550mm/min的工艺参数范围内,冰冻装卡方法能有效控制镁锂合金壳体零件的加工部位和切削区域的温度,使镁锂合金壳体零件的切削加工过程零件温度和切削区域平均温度,远远低于镁锂合金材料燃点温度,显著避免加工过程中切屑燃烧的安全隐患,极大提高加工效率。该工艺方法在某卫星的陀螺仪控制壳体加工中成功应用。

In this paper,the effects of freezing loading on reducing the temperature of MG-Li alloy shell with dif-ferent milling parameters were studied.The milling experiment of MG-Li alloy shell was carried out by means of ice plate and infrared thermometer,and the influence of ice loading method on the temperature of MG-Li alloy shell parts and cutting tools was explored.The results show that the spindle speed n ranges from 3000 to 3500r/min and the back cutting capacity ap ranges from 0.3 to 0.7mm.In the process parameter range of 300~550mm/min,the freezing loading method can effectively control the machining parts of magnesium lithium alloy shell parts and the temperature of the cutting tool,so that the cutting process temperature of magnesium lithium alloy shell parts and the tool temperature are far lower than the burning point temperature,significantly avoiding the safety risks of combustion during the processing process,and greatly improving the processing efficiency.The process method has been successfully applied in the con-trol shell of a satellite gyroscope.