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针对汽车翼子板拉深成形中出现的面品质量问题,分析棱线滑移产生原因;基于模面工程设计了3种不同的型面方案,即优化分模线形状与局部塑性流动控制结构,解决了主棱线两侧区域材料瞬时流动不均的问题。通过比较翼子板关键区域的板料减薄量,分析了型面优化对提高板料塑性的影响,以及优化工艺槽的设置可以有效提高板料塑性变形量。结合有限元数值分析与生产试验验证,确定了采用平缓过渡的分模线、局部工艺结构等型面设计方案C能有效地提高翼子板的面品质量。将棱线滑移距离控制在5 mm的合理范围内,且产品整体塑性变形充分。
Aiming at the quality problems of the face products appearing in the deep drawing of the automobile fender, the reasons for the edge slip were analyzed. Three different profile schemes were designed based on the mold surface project, that is, the optimized parting line shape and the local plastic flow control structure , To solve the problem of uneven instantaneous flow of material on both sides of the main ridge. By comparing the amount of sheet material thinning in the key area of the fender, the influence of surface optimization on the plasticity of the sheet metal was analyzed, and the optimization of the groove arrangement could effectively increase the plastic deformation of the sheet metal. Combined with finite element numerical analysis and production test, it is confirmed that the design scheme C, such as the parting line with gentle transition and the partial process structure, can effectively improve the quality of the fender. The edge of the slippage control within a reasonable range of 5 mm, and the overall plastic deformation of the product sufficient.