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探讨铣削力三维有限元计算方法,研究航空薄壁零件高速加工切削力变化规律。基于Advant Edge 3D铣削模块,实现对AL7075航空铝合金材料的铣削过程仿真加工并研究铣削力规律。预测不同切削时间下工件及刀具上的温度分布,建立高速铣削参数对铝合金7075铣削力和铣削温度的影响曲线。通过实际铣削试验验证仿真结果的可靠性。研究结果表明:在铣削速度v为250~1 500 m/min,切削速度大于250 m/min时,切削力随切削速度增加而快速下降;当切削速度大于500 m/min时,切削力变化不大,呈微量上升趋势;轴向力FZ在整个速度范围内变化不大;高速铣削参数对铝合金7075铣削力和铣削温度的影响曲线可辅助优化切削加工参数,有助于减小切削过程中刀具的磨损,改善刀具切削状态,提高刀具使用寿命,为预测其他材料的铣削力提供了新的有限元建模方法。
The calculation method of three-dimensional finite element of milling force was discussed to study the variation of cutting force of high-speed machining of thin-walled aviation parts. Based on the Advant Edge 3D milling module, the milling process of AL7075 aviation aluminum alloy is simulated and the law of milling force is studied. Predict the temperature distribution of the workpiece and the tool under different cutting times, and establish the influence curve of high-speed milling parameters on the milling force and milling temperature of 7075 aluminum alloy. The actual milling test verifies the reliability of the simulation results. The results show that the cutting force rapidly decreases with the increase of the cutting speed when the cutting speed v is 250-1 500 m / min and the cutting speed is more than 250 m / min. When the cutting speed is more than 500 m / min, the cutting force does not change Large, showing a slight upward trend; axial force FZ little change in the entire speed range; high-speed milling parameters on the aluminum alloy 7075 milling force and milling temperature curve can help optimize the cutting parameters, help to reduce the cutting process Tool wear, improve the cutting tool state, improve tool life, and provide a new finite element modeling method for predicting the milling force of other materials.