锻压技术

拉深成形过程中不规则楔形深腔件的缺陷控制

英文标题：Defect control of irregular wedge-shaped deep cavity during deep drawing process

作者：白颖李善良段嘉庆王汝姣黄润卓

分类号：TG386

出版年,卷(期):页码：2019,44(10):49-55

摘要：

拉深成形过程中，经常伴有凸缘失稳起皱、壁厚变化不均、底部拉裂以及弹性回复等缺陷，不规则复杂立体零件的缺陷表现会更加明显。针对飞机机身尾段外露的复杂楔形空腔仪器保护件，借助于PAMSTAMP模拟软件建立有限元模型，对带平直面非规则深腔零件拉深成形起皱、拉裂等缺陷进行数值分析，研究零件楔形理论结构对拉深成形材料流动的影响规律，优化毛坯、模具结构和压边力等参数，通过试验加以验证。结果表明，优化后的参数最终实现了极限展开毛坯的精确拉深成形，解决了落压成形工序繁琐、周期长、起皱严重、表面质量差等瓶颈问题。

During deep drawing, defects such as instability wrinkling in flange, uneven distribution in wall thickness, cracking in bottom and springback often occur, which are especially evident for irregular complex 3D parts. For the instrument protecting part of complex wedge-shaped deep cavity at the exposed tail section of an aircraft fuselage, the finite element model was established by simulated software PAMSTAMP, and the defects of wrinkle and cracking in deep drawing of irregular deep cavity parts with flat straight faces were simulated numerically. Then, the influence of wedge-shaped hollow structure on material flow during deep drawing was researched, and the parameters of blank, die structure and blank-holder force were optimized, which were verified by experiment. The results show that the optimized parameters realize the accurate deep drawing of ultimate unfolding blank and solve the problems of complex, long cycle, serious wrinkle and poor surface quality for drop forming process.

基金项目：

作者简介：白颖（1972-），女，学士，研究员 E-mail：baiyingsyh@163.com

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