锻压技术

板料凸起成形的底部压缩拉深法

英文标题：Study on bottom compression-drawing of boss deforming on plate

作者：林启权张学兵王振球

单位：湘潭大学

分类号：TG386

出版年,卷(期):页码：2010,35(6):53-57

摘要：

介绍了凸起成形的一种新加工方法——底部压缩拉深法。利用有限元软件Deform-3D对薄板上凸起成形过程进行了数值模拟，分析了初始板厚、摩擦条件、背压对加工载荷和凸起高度的影响。结果表明：初始板厚、摩擦条件、背压对加工载荷和凸起高度有明显影响。初始板料越厚，极限凸起高度越高，缩孔缺陷越难发生；摩擦系数越小，极限凸起高度越高，越容易产生缩孔缺陷；施加的背压越大，极限凸起高度越高，越容易产生缩孔缺陷。选取合适的加工条件，可避免缩孔缺陷。

Bottom compression-drawing was introduced for boss deforming as a new processing method. Numerical simulation of boss deforming on the thin plate was made by means of finite element software Deform-3D. The affect of initial plate thickness, friction and backpressure on the load and boss height was analysed. The simulation result shows that the initial thickness, friction and back pressure have significant influence on the processing load and boss height; while the initial plate becomes thicker, the ultimate value of boss height increases and shrinkage defects reduces. As the friction coefficient decreases, the ultimate value of boss height increases and shrinkage defects occurres easily. The larger the backpressure is, the bigger the ultimate value of boss height and the less shrinkage defects will be. Shrinkage defects can be avoided if the parameters are appropriately chosen.

基金项目：

湖南省科技厅项目（2009WK3045）

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