大曲率凸曲线零件的橡皮成形数值模拟研究.docVIP

大曲率凸弯边零件橡皮囊液压成形 工艺的数值模拟研究 王福东1，陈明和1，熊杰2 (1. 南京航空航天大学机电学院 南京210016; 2. 洪都飞机制造有限公司 南昌 330000) 摘 要：为了得到大曲率凸弯边零件的橡皮囊液压成形工艺参数，采用有限元软件ABAQUS对成形过程进行了数值模拟，分析了侧压块各参数对成形的影响，对成形参数进行了优化，结果表明：合适的侧压块参数为侧压块与模具距离D取12mm，侧压块倾角α取70°，侧压块圆角半径R取8mm，对应的坯料搭边尺寸L为20mm；在有限元数值模拟的基础上进行成形试验，成形出了合格的大曲率凸弯边零件，零件厚度分布与数值模拟结果一致，且模拟的最小厚度与试验结果误差很小，验证了有限元模型的可靠性，可用于成形时工艺参数的制定。 关键词：or Shrink Flanging Part with Large Curvature WANG Fu-dong1, CHEN Ming-he1, XIONG Jie2 (1. College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016，China； 2. Hong Du Aircraft Manufacturing Co., Ltd, Nanchang 330000, China) Abstract: In order to obtain the process parameters of the rubber bladder hydraulic forming for the shrink flanging part with large curvature, the finite element software ABAQUS was used to simulate the forming process. The influence of different parameters of the side blank holder was analyzed and the process parameters were optimized. Results show that, the suitable parameters simulated are the distance between side blank holder and die 12mm, the dip angle of the side blank holder 70°, the fillet radius of the side blank holder 8mm, and the corresponding lap width 20mm; Based on the numerical simulation, the experiment was done and the qualified part was formed, the distribution of thickness of part is consistent with the result of numerical simulation, the error of minimum thickness of the simulation is very small compared with the result of the experiment, which verifies the reliability of the finite element model and can be used for the formulation of the forming process parameters in practical production. Key words: shrink flanging part with large curvature; rubber bladder hydraulic forming; numerical simulation; side blank holder; wrinkling 0 引言 本文所研究的大曲率凸弯边零件为飞机翼肋类零件。翼肋零件是形状复杂、种类多且批量小、劳动强度大的板材类零件。采用传统的冲压法压制这类复杂零件时，模具制造费用高，生产准备周期长；另外，翼肋零件对外形和表面质量要求较高，采用手工敲打或冲压成形生 收稿日期：2011-01-07 修订日期：2011-10-05 作者简介：王福东（1985-），男，山东济宁人，硕士研究生。 导师：陈明和教授 产时经常不能满足