锻压技术

基于Autoform汽车左中侧围内板加强板成形模拟及工艺优化

英文标题：Forming simulation and process optimization on automobile left middle side inner panel reinforcement plate based on Autoform

作者：姜旭周六如

单位：南昌大学

关键词：左中侧围内板加强板冲压减薄率分布图增厚图成形极限图 Autoform

分类号：TG386

出版年,卷(期):页码：2018,43(10):47-51

摘要：

以某主机厂轻型客车左中侧围内板加强板为研究对象，对其结构特征进行分析，设计的冲压工序为拉延修边、冲孔修边、冲孔整形翻边。在初步设计压边力、拉延筋、工艺补充面等参数的基础上，利用Autoform对其进行有限元模拟，通过分析模拟结果中的减薄率分布图、增厚图和成形极限图FLD，确定了压边力大小为800 kN，并调整工艺补充面，降低工艺补充面的高度差，将拉延筋设定为以零件边界为基础的整圈拉延筋，且拉延筋方向与材料流动方向相垂直，外形应平滑以适应零件凹口形状。最终采用优化后的工艺参数，指导试生产，得到合格零件，从而验证了有限元模拟分析的正确性。

For left middle side inner panel reinforcement plate in the light bus of a main engine factory, the structural characteristics were analyzed, and the stamping process was designed as drawingtrimming, punchingtrimming, punchingshaping and flanging. Based on the preliminary design of parameters such as blank holder force, drawbead and supplementary surface of process, the process was simulated by Autoform, and the blank holder force was determined to be 800 kN by analyzing the thinning rate distribution diagram, the thickening diagram and the forming limit diagram FLD in the simulation results. Then, the process supplementary surface was adjusted to reduce the height difference, and the drawbead was set as a fullcircle drawbead based on the boundary of part. Furthermore, the direction of drawbead was perpendicular to the flow direction of material, and the shape should be smooth to fit the notch shape of part. Finally, the qualified parts were obtained in the trial production by the optimized process parameters, and the correctness of the finite element simulation analysis was verified.

基金项目：

国家自然科学基金资助项目（51465038）

姜旭(1992-)，男，硕士研究生，E-mail：1093651003@163.com；通讯作者：周六如(1963-)，男，博士，副教授，E-mail：zlrhust@163.com

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