The effect of major parameters of die structure on metal flow velocity is integrated and the mathematical model of design and calculation of aluminum profile extrusion die land length is derived.
并综合主要模具结构参数对金属流动速度的影响，建立了铝型材挤压模模孔工作带设计计算的数学模型。
Through the mathematical simulation of the velocity profile, the concentration profile and temperature profile, the correctness of the design criteria of furnace arch structure is testified.
通过速度场、浓度场和温度场的数值模拟证明了本文提出的设计原则的合理性。
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