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通过数值模拟分析与正交试验相结合研究了成形工艺参数对矩形电机并头套弯曲后回弹的影响,确定了最优工艺参数组合。并进行了试验,验证了模拟结果,采用模具补偿法进一步减小回弹。结果表明:凸模圆角对回弹影响最大,其次是模具间隙,而凹模圆角与冲压速度对回弹的影响很小;回弹量随凸模圆角半径的增大而增大,随模具间隙的增大而增大,随凹模圆角半径的增大而先减小后不变,随冲压速度的增大呈现出先减小后增大的趋势;使用最优工艺参数的模具进行了成形试验,验证了模拟的正确性;设计的模具补偿法可进一步减小回弹。
Through the combination of numerical simulation and orthogonal test, the influence of forming parameters on the springback of the rectangular motor and the bushing is studied, and the optimal combination of the technological parameters is determined. Experiments were carried out to verify the simulation results and the mold compensation method was used to further reduce the springback. The results show that the punch fillet has the most influence on springback, followed by the die clearance, while the effect of die fillet and punch speed on springback is small. The springback amount increases with the increase of punch fillet radius, With the increase of die gap, the die radius decreases first and then decreases with the increase of die radius. With the increase of press rate, the die first decreases and then increases. The die with the best process parameters The forming test was carried out to verify the correctness of the simulation. The designed mold compensation method can further reduce the springback.