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基于Deform软件对轿车连杆热锻工艺进行有限元模拟,研究锻模结构对连杆折叠缺陷的影响。用原始锻模进行有限元模拟,结果表明:原始锻模的中心飞边仓深度、两模膛的中心距和旋转角均太大,导致连杆小端出现严重的折叠缺陷。通过移除连杆锻模的中心飞边仓、改变模膛中心距和旋转角的大小,对轿车发动机连杆的锻模结构设计进行改进。利用改进后的模具进行数值模拟,结果表明:锻件无折叠缺陷,金属的侧向流动更加合理,连杆的预锻成形载荷大幅降低。实际热模锻后得到了无缺陷的连杆锻件。
Based on the Deform software, the finite element simulation of the hot forging process of the connecting rod of the car was carried out to study the influence of the die structure on the folding defects of the connecting rod. The original die for finite element simulation, the results show that: the original die forging the center of the fringe depth, the center of the two mold cavity and the rotation angle are too large, resulting in a serious end of the connecting rod folding defects. The structure design of the forging die of the engine connecting rod of the car is improved by removing the center flyer of the connecting rod forging die, changing the center distance of the die bore and the rotation angle. The results show that the forging has no folding defects, the lateral flow of the metal is more reasonable and the pre-forming load of the connecting rod is greatly reduced. After the actual hot forging obtained without defect link forgings.