航空铝合金高速铣削加工的有限元模拟

研究了铣削加工模拟所涉及的切削层的等效简化、工件材料的流动应力模型、刀屑接触面的摩擦模型和热传导控制方程等关键技术，并针对铣削加工的特点，建立了铣削加工模拟的有限元模型，基于此模型对高速铣削加工航空铝合金7050 T7451的切削力、应力和温度进行了有限元模拟.通过铣削力实验测得了同样切削条件下的铣削力值，其值与数值模拟结果比较吻合，证明了所建有限元模型的正确性，从而也表明了采用此模型进行的应力和温度的模拟结果是可信的.铣削加工有限元模拟研究为铝合金切削加工的工艺参数优化、刀具的优选和工艺规划奠定了基础.

Simulation of high-speed milling process of aerospace aluminum alloy

Some key technologies such as effective simplification of cutting layer,flow stress modeling of workpiece material,friction modeling between tool's rake face and chip,and heat conduction equation were studied firstly.A finite element model was established,and cutting force,stress and cutting temperature were simulated based on the model during high-speed milling process of 7050-T7451 aluminum alloy.A milling force experiment was carried out,and a good agreement between simulation and experimental data was achieved.The result that proves that the presented finite element model presented in this paper is correct,and stress and temperature are also predicted with acceptable accuracy.The study has laid a base for material process parameter optimization,tool selection optimization and technics programming.