锻压技术

基于模面工程的翼子板主棱线材料瞬时塑性流动控制

英文标题：Instantaneous plastic flow control of main ridge of auto fender based on die surface engineering

作者：张心怡王成勇王思艳陈勇章戴程

分类号：TG386

出版年,卷(期):页码：2015,40(12):21-25

摘要：

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。

For the problem of surface quality of automotive fender appeared in deep drawing, it was analyzed the reason about the ridge slip. Three different projects of die profile design were proposed based on die surface engineering. The problem of uneven instantaneous material flow on both sides of the main ridge area was solved by optimizing parting line shape and controlling the local plastic flow. The influence of optimum surface on improving the plastic structure of the sheet was analyzed by comparing the thickness reduction of the fenders key area, and the plastic value of the sheet was improved by optimizing the position of process groove. Combining the simulation analysis with the experimental verification, the quality of the outer surface of the fender could be improved efficiently by profile design plan C using gentle transition parting die line and local process structure. As a result, the ridge sliding distance was controlled in reasonable range of 5 mm, and plastic deformation of the product was full.

基金项目：

国家自然科学基金资助项目（51275146）

作者简介：张心怡（1990-），男，硕士研究生通讯作者：王成勇（1972-），男，博士，副教授

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