摘要
到目前为止,全膜润滑的金属成形的数值分析非常少,这主要是由于求解润滑模型的方法只适用于轴对称和平面应变情况。因此,提出了全润滑膜润滑和金属成形有限元法相结合的方法,适用于稳态和非稳态的三维成形工艺,当然也适用于轴对称和平面应变情况。用一个轴对称拉深成形作为一个试验样板,用该法理论计算出的润滑膜厚与实测值相一致,并与其他方法的计算值进行比较,证明这种方法不仅是正确的,还提高了精度。
Very few attempts have ever been made to analyze a complex full film lubricated metal forming process numerically, due to the fact that usually the methods of solving the lubrication model are available for axisymmetric and plane strain cases only. Accordingly, a unified procedure of combining the finite element codes of full film lubrication and metal forming has been developed in this paper for either steady or unsteady three-dlmensional processes including axisymmetric and plane strain cases. The availability of the method is proved by performing a benchmark study on an axisymmetric stretch forming process. It shows that the precision of simulation can be enhanced substantially by the present method. A better agreement between predicted and experimental film thickness verifies the advantages of the proposed method over the prior studies.
出处
《新技术新工艺》
2006年第4期68-71,共4页
New Technology & New Process
关键词
全膜润滑
有限元法
金属成形
full film lubrication, finite element method, metal forming
