锻压技术

5A02-O铝合金锥底筒形件充液拉深有限元模拟

英文标题：

作者：王秀丽胡桃桃喻家俊王会廷

单位：安徽工业大学

分类号：TG156

出版年,卷(期):页码：2018,43(7):134-139

摘要：

锥底筒形件由锥底和较高的直壁筒组成，其充液拉深过程中液压加载路径既不同于筒形件，也有异于锥形件。利用DYNAFORM有限元软件对锥底筒形件充液拉深过程进行模拟，研究了不同液室压力加载路径对充液拉深锥底筒形件壁厚分布、破裂与起皱等的影响规律，分析了锥底筒形件液压加载路径控制策略。研究结果表明：采用2拐点的液压加载路径适合锥底筒形件充液拉深成形，第1个拐点位置为凸模底部圆角圆心，与凹模圆角圆心在同一条水平线上，第2个拐点位置为凸模锥底上部圆角圆心，与凹模圆角圆心在同一条水平线上；充液拉深得到的锥底筒形件壁厚分布存在2个波谷点，第1个波谷点在锥底筒形件锥形底部圆角和锥壁的结合处（A点），第2个波谷点在锥底上部圆角和直壁结合处（B点）；对于不同的拉深比和锥角，应该采用合理的液压加载路径。

The cylindrical part with conical bottom composes of a conical bottom and a higher straight wall cylinder, and the hydraulic pressure loading path in the hydraulic deep drawing process is different from those of both cylindrical part and conical part. Therefore, the hydraulic deep drawing process of the cylindrical part with conical bottom was simulated by finite element software DYNAFORM, and the influences of different hydraulic pressure loading paths on their wall thickness distribution, fracture and wrinkling were analyzed. Then, the control strategy of hydraulic pressure loading path for the cylindrical part with conical bottom was also studied. The results show that the hydraulic pressure loading path of two inflection points is suitable for the hydraulic deep drawing of the cylindrical part with conical bottom. Namely, the first inflection point is fillet center at the punch bottom, which is on the same horizontal line as the fillet center at the die, and the second inflection point is fillet center at the top of conical bottom of punch, which is on the same horizontal line as the fillet center at the die. Furthermore, there are two wave trough points in the wall thickness distribution of formed cylindrical part with conical bottom by hydraulic deep drawing, the first point lies at the junction between bottom fillet and conical wall of the cylinder part with conical bottom (Point A), the second point lies at the junction between fillet at the top of conical bottom and straight wall (Point B). Thus, the reasonable hydraulic pressure loading path should be adopted according to different drawing ratios and cone angles.

基金项目：

国家自然科学基金资助项目（51275003）

王秀丽（1991-），女，硕士研究生，E-mail：469990054@qq.com；通讯作者：王会廷（1971-），男，博士，副教授，E-mail：wgwht@nuaa.edu.cn

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