锻压技术

大型双相钢封头压鼓成形数值模拟研究

英文标题：Numerical simulation research on pressure drum forming for large dual phase steel head

作者：代奥阮金华王志刚张宏昱

单位：武汉科技大学

分类号：TG386.41

出版年,卷(期):页码：2022,47(10):56-62

摘要：

采用有限元数值模拟作为研究手段，将大型双相钢封头作为研究对象，通过分析其应力、应变和速度来研究封头压鼓成形过程中坯料的变形规律。结果表明，在坯料中面的任一法线上，不同点的应力与应变有较大的不同，说明了该有限元模型不应采用壳单元。在压鼓成形前期，坯料主要受到上模的压力，使其上模底端附近的金属向尾端流动；随着压下量的增加，位于下模圆角处的坯料的拉应力也达到材料的屈服点，在下模圆角的弯曲作用下附近的金属向板坯中心流动；随着压下量进一步增大，坯料与上模贴合的部分越来越多，该区域的金属速度逐渐趋向于0，而下模圆角附近的金属速度则越来越大。研究成果可用于指导压鼓模的制造和路径的控制。

Based on finite element numerical simulation, for the large dual phase steel head, the deformation laws of blank in the pressure drum forming process of head were studied by analyzing its stress, strain and velocity. The results show that the stress and strain at different points on any normal line of the middle plane of blank are different, which indicates that the shell element should not be used in this finite element model. In the early stage of pressure drum forming, the blank is mainly subjected to the pressure of upper die, so that the metal near the bottom end of upper die flows to the tail end. With the increasing of reduction amount, the tension stress of blank located at the lower die fillet corner also reaches the material yield point, and the metal near the lower die fillet corner flows into the sheet blank centre under the bending action. With the further increasing of reduction amount, more and more parts of blank and upper die are attached, and the metal velocity in this area gradually tends to zero, while the metal velocity near the fillet corner of lower die becomes larger and larger. Thus, the research results can be used to guide the manufacturing and path control of pressure drum die.

基金项目：

代奥（1996-），男，硕士研究生,E-mail：a1091041840@qq.com;通信作者：王志刚（1973-），男，博士，教授,E-mail：wzhigang@wust.edu.cn

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