摘要
在汽车覆盖件模具的设计过程中,设计翻边模之前需要事先给定修边线,为了能够得到一个精确的最终零件,预先设计出一条合适的修边线是一项很重要的工作。现提出一种基于一步逆成形的快速设计修边线的方法。由于翻边后的零件是事先给定的而且翻边成形过程中的应变路径一般都比较简单,所以一步逆成形法能够在翻边前预示修边线。这样就可以在模具早期设计阶段通过一步逆成形所展开的初始坯料的边界线中获得一条离散的修边轮廓线,并将这条修边轮廓线导入CAD系统中。最后将该方法应用到两个基本的曲面翻边过程中,并成功地预示出修边线。
During manufacturing process of auto-body panels ,the trimming line should be designed in advance of flanging. It is an important task to find a feasible trimming line to obtain a precise final part shape after flanging. This paper proposes a new fast method which is used to find feasible trimming line based on one-step analysis. The one-step analysis method can be used to predict the trimming line before flanging since the desired product shape after flanging can be defined from the final configuration and most of strain paths are simple during the flanging process. Finally,designers can obtain a discrete trimming line from the boundary of the developed meshes after one-step analysis and import it into CAD system in the early design stage. The proposed method has been successfully applied to two basic curve flanging processes and is demonstrated with many advantages.
出处
《机械制造与自动化》
2009年第2期26-28,35,共4页
Machine Building & Automation
关键词
修边线
一步逆成形
翻边
trimming line
one-step inverse analysis
flanging
