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直齿圆柱齿轮冷精锻成形属于复杂三维塑性成形问题，本文采用上限法进行力能参数的求解。给出了基于分流理论的精锻工艺的上限分析模型，同时利用最优化理论分析了各工艺参数的影响规律
Cold precision forging of spur gears is a complex three-dimensional plastic forming problem. In this paper, the upper bound method is used to solve the force and energy parameters. The upper bound analysis model of precision forging process based on shunt theory is given, and the influence law of each process parameter is analyzed by using optimization theory