本文建立了以主应力法计算落差锻件水平错移力的数学模型,选取单元飞边槽尺寸做为设计变量,用复合形法求出了设计最优尺寸。把目标函数进行线性化,用改进的单纯形法也同样实现了锻模优化设计。对两个实际锻件的计算表明:优化效果良好,水平错移力只有原始设计的10％。 In this paper, a mathematic model was established to calculate the horizontal misalignment force of drop forging by the principal stress method. The size of the flash gap of the unit was chosen as the design variable, and the optimal design size was obtained by the complex method. The linearization of the objective function, with the improved simplex method also achieved forging optimization design. The calculation of two actual forgings shows that the optimization effect is good, and the horizontal misalignment force is only 10% of the original design.