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以多边型铝合金材料为对象,建立热力耦合应力场数学模型,运用DEFORM有限元分析软件模拟铝合金在挤压成型过程中金属材料的流动性、温度场、速度场和模具应力的变化规律,并从型材各截面不同壁厚间金属液流速均匀性出发,通过调整工作带长度,对模具结构进行了优化设计。结果表明,优化后模具的压力分布更加均匀,有利于提高模具的寿命和制品的品质。
Taking polygonal aluminum alloy as an example, the mathematic model of thermal coupling stress field was established. The variation of fluidity, temperature field, velocity field and die stress of aluminum alloy during extrusion process was simulated by DEFORM finite element analysis software. Based on the uniform flow velocity of molten metal between the sections with different wall thicknesses, the mold structure was optimized by adjusting the working belt length. The results show that the optimized die pressure distribution more uniform, is conducive to improving die life and product quality.