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介绍了采用加筋结构的油底壳结构工艺性分析及形状优化情况,通过模态计算分析,局部增加加强筋后,油底壳局部模态频率提高了一倍,应力幅值降低了30%。通过设定凹模圆角半径、拉延速度等边界条件,采用Stmping Xert软件分析并确定油底壳成形工艺方案为:采用两次拉延的拉延成形工艺。最后,通过对模具进行了优化设计,包括加强筋部位的过渡圆角;拉延筋的形状、尺寸和位置;毛坯的形状尺寸,确定了模具的整体结构。经一系列试验验证后说明,采用优化工艺及模具得到的油底壳零件满足质量要求。
The technological analysis and shape optimization of the oil pan structure with reinforced structure are introduced. By modal analysis and calculation, the local modal frequency of the oil pan is doubled and the stress amplitude is reduced by 30% . By setting the boundary conditions of fillet radius, drawing speed and other conditions, using Stmping Xert software analysis and determine the oil pan forming process scheme is: the drawing process using two drawing. Finally, through the optimization design of the mold, including the transition fillet reinforcement; drawbead shape, size and location; shape and size of the blank to determine the overall structure of the mold. After a series of tests verify that the use of optimized technology and mold oil pan parts to meet the quality requirements.