基于CAE的汽车动力电池固定支架冷冲压工艺设计与分析

以汽车动力电池固定支架为研究对象,基于CAE软件Dynaform对该产品的冷冲压工艺进行设计与分析。通过CAD软件UG建立产品的三维数字模型,结合产品的材质、结构特点、精度和质量要求,确定了产品的冷冲压工艺方案为落料、拉延、冲孔修边。重点利用Dynaform软件对其拉延工序的工艺设计及参数进行数值模拟,依据模拟结果的成形极限图,获得了压边力、润滑条件和拉延筋参数对产品成形质量的影响。在压边力为700 k N、采用液体润滑剂(摩擦系数0.05)和拉延筋高度为7 mm、宽度为11 mm、圆角半径为4 mm、槽凸缘半径为3 mm的条件下,避免了产品出现起皱、拉裂、变形不足等缺陷,保证了产品的成形质量。

Design and analysis on stamping process of car power battery fixed bracket based on CAE

The car power battery fixed bracket process was designed and analyzed based on CAE software ( Dynaform) , and the contents of stamping process plan were determined as blanking, drawing and trimming-piecing by a 3D digital model of CAD software (UG) with considerations of the material, structure features, precision and quality requirements. With a focus on the simulation of process design and parameters of drawing process by software Dynaform, the influences of blank-holder force, lubrication condition and drawbead parameters on the forming quality were obtained according to the forming limit diagram of simulative results. Under the conditions of blank-holder force 700 kN, liquid lubricant (friction coefficient 0. 05), drawbead height 7 mm, drawbead width 11 mm, fillet radius 4 mm and slot flange radius 3 mm, the defects such as wrinkling, cracking and insufficient deformation are avoided, and the forming quality of the prod-uct is ensured.