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高速切削过程中切削温度对刀具磨损、工件加工表面完整性及加工精度有极大的影响。应用有限元法对高速铣削铝合金薄壁件过程中工件与刀具接触面温度、工件内部的温度分布进行了仿真研究,仿真过程中考虑了切削速度、进给量对切削温度的影响。通过红外热像仪对不同主轴转速下工件表面温度的测量,验证了仿真结果与试验结果比较接近。得出在高速切削铝合金过程中,随着切削速度的增加,刀具与工件接触区的温度变化存在二次效应。该结论对铝合金薄壁件加工具有重要的实用价值。
Cutting temperature during high-speed cutting tool wear and tear, workpiece surface finish and machining accuracy have a great impact. The temperature of workpiece-tool contact surface and the temperature distribution inside the workpiece during the process of high-speed milling aluminum alloy thin-walled parts were simulated by finite element method. The influences of cutting speed and feed rate on cutting temperature were considered in the simulation. Through the measurement of the surface temperature of the workpiece under different spindle speeds by the infrared camera, it is verified that the simulation result and the test result are relatively close. It is concluded that there is a secondary effect on the temperature change of the contact area between the tool and the workpiece with the increase of the cutting speed during the high speed cutting of the aluminum alloy. This conclusion is of great practical value for the processing of aluminum alloy thin-walled parts.