论文部分内容阅读
研究了铝合金罩盖刚性模拉深预成形-新淬火-充液拉深终成形的多道次成形工艺。通过分析零件的几何特征,确定预成形中间构型的几何形状以及确定合理的冲压方向。基于有限元分析软件Dynaform对成形工艺进行模拟分析,优化成形过程的关键工艺参数,并进行试验验证与优化。研究表明:液室压力及加载路径对充液拉深成形零件质量影响较大,成形所需最大液室压力为15 MPa,充液拉深终成形后的零件壁厚最大减薄率为11.424%,侧壁与法兰没有明显的起皱趋势。试验证明对于该铝合金罩盖零件,采用刚性模拉深预成形-新淬火-充液拉深终成形的多道次成形工艺较传统多道次拉深工艺有明显的优势,可得到表面质量良好的合格零件。
The multi-pass forming process of the preforming-new quenching-liquid filling deep drawing of the aluminum alloy cover was studied. By analyzing the geometry of the part, the geometry of the preformed intermediate configuration is determined and a reasonable direction of pressing is determined. Based on the finite element analysis software Dynaform, the forming process was simulated and analyzed, the key process parameters of the forming process were optimized, and the experimental verification and optimization were carried out. The results show that the pressure in the liquid chamber and the loading path have a great influence on the quality of the part formed by liquid-filled drawing. The maximum liquid chamber pressure required for forming is 15 MPa. The maximum thinning rate of part wall thickness after liquid-filled drawing is 11.424 %, There is no obvious wrinkle tendency between sidewall and flange. The test proves that for the aluminum alloy cover parts, the multi-pass forming process using the rigid die drawing preforming-new quenching-liquid filling drawing has more obvious advantages than the traditional multi-pass drawing process, and the surface Good quality and qualified parts.