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角型材转台式拉弯回弹的解析分析
摘要:从理论上对角型材的拉弯回弹进行研究,基于角型材截面应力、应变分布算法建立拉弯解析模型,推导零件卸载后回弹角的计算公式,分析讨论预拉力和补拉力对回弹的`影响规律.结果表明:拉弯零件的回弹随着预拉力或补拉力的增大而减小.与试验结果的对比表明,建立的解析模型能够较好地预测角型材拉弯零件的回弹.Abstract:The theoretical analysis of springback in rotary stretch bending process of L-section extrusion was studied.The models for characterizing the springback angle after unloading were established based on the stress and strain distributions in the cross-section of the part.With the proposed model,analysis of the effect of pre-stretch force and post-stretch force on springback angle shows that springback decreases as the pre-stretch force or post-stretch force increases.Comparative study with experiments clearly demonstrates that the prediction of springback can resort to the current model without the loss of accuracy. 作者: 于成龙李小强 Author: YU Cheng-long LI Xiao-qiang 作者单位: 北京航空航天大学机械工程及自动化学院,北京,100191 期 刊: 中国有色金属学报(英文版) ISTICEISCI Journal: Transactions of Nonferrous Metals Society of China 年,卷(期): 2011, 21(12) 分类号: V261 关键词: 回弹 转台式拉弯 解析分析 Keywords: springback rotary stretch bending theoretical analysis 机标分类号: V26 TS7 机标关键词: 角型材 转台式拉弯 回弹角 解析分析 预拉力 解析模型 analysis 零件 model decreases 影响规律 型材拉弯 试验结果 截面应力 计算公式 分析讨论 分布算法 对比表 stress study 基金项目: the China Postdoctoral Science Foundation,the National Natural Science Foundation of China【角型材转台式拉弯回弹的解析分析】相关文章:
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