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摘要：
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应用Deform-3D软件对小型铝合金封头整体冲锻成形过程中的模具进行应力分析，讨论容差值大小对施加模具受力分析的影响，并分别讨论凸模下压速度、摩擦系数、凹模圆角半径对凹、凸模具应力的影响规律，并通过模具应力分析确定对模具有利和能减少封头缺陷的最佳工艺参数。结果表明：容差值的大小严重影响模具受力分析，当容差值≥2时，模具沿各方向的受力与坯料对应方向受力基本吻合；凹模圆角半径对模具受力影响最大，摩擦系数次之，凸模下压速度影响最小。同时，确定凹模圆角半径11 mm、凸模下压速度120 mm·s-1、摩擦系数0.02为最佳铝合金封头冲锻工艺参数。
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The stress analysis of mold in the whole punching-forging process of small aluminum alloy head was conducted by software Deform-3D, and the influence of tolerance value on the mold stress analysis was discussed. Then, the influences of punch pressing speed, friction coefficient and die fillet radius on the stress of punch and die were discussed respectively, and the optimum process parameters that are favorable to the mold and can reduce the defects of head were determined by the mold stress analysis. The results show that the tolerance value seriously affectes the mold stress analysis. When the tolerance values ≥2, the stress along various directions of mold is basically consistent with the corresponding directions of billet, and the die fillet radius has the greatest influence on the mold stress, the friction coefficient is the second, and the punch pressing speed is the least. At the same time, the optimal punching-forging process parameters of aluminum alloy head are determined as the die fillet radius of 11 mm, the punch pressing speed of 120 mm·s-1 and the friction coefficient of 0.02.
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基金项目：
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国家自然科学基金资助项目（51574147，51790481）；辽宁省自然科学基金资助项目（201602474）
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作者简介：
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王旺兵（1993-），男，硕士研究生，E-mail：2279539707@qq.com；通讯作者：王旭（1979-），男，博士，副教授，E-mail：wangxu@lnpu.edu.cn
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