|
摘要：
|
|
研究了铝合金2024-T3板料在新淬火状态下的成形过程。首先测量了2024-T3板材在新淬火状态下的力学性能,与原始状态性能比较发现,屈服强度和抗拉强度降低,延伸率增大,韧性增加。基于数值模拟方法模拟了橡皮成形过程的回弹规律,对翼肋零件的翻边回弹进行了数值模拟,并通过试验进行了比较。结果表明,数值模拟与试验结果吻合较好,模拟与试验间的偏差是板料发生加工硬化所导致的。因而,通过模拟可以得到考虑了回弹的模具形状,从而修正模具,使回弹后形状达到设计的精度。数值模拟与试验比较表明该方法是可行性的。
|
|
The forming process of 2024-T3 aluminium sheet metal under new quenching state was studied.The tensile properties of 2024-T3 after quenching were measured.It is found that the yield strength and ultimate tensile strength are reduced,while total elongation value is increased.Springback character of rubber forming was studied by numerical method and springback compensation of rib flanging was analyzed.The simulation was compared with experiment.The tool shape is got using numerical method in consideration of sprinback.The part design accuracy after springback was achieved.So the method can be put into practice..
|
|
基金项目：
|
|
|
|
作者简介：
|
|
|
|
参考文献：
|
[1]Narkeeran N,Michael L.Predicting springback in sheet metalforming:an explicit to implicit sequential solution procedure[J].Finite Elements in Analysis and Design,1999,33(1):29-42.
[2]周朝晖,蔡中义,李明哲.多点模具拉形中回弹的数值分析[J].锻压技术,2006,31(2):94-96.
[3]陈磊,张立文.机油盘冲压过程截面的有限元模拟与实验验证[J].机械科学与技术,2003,22(2):278-279.
[4]Samuel M.Experimental and numerical prediction of spring-back and side wall curl in U-bendings of anisotropic sheet met-als[J].Journal of Materials Processing Technology,2000,105(3):382-393.
[5]黄荣学,曹建国,范洪远.有限元法在冲压模具分析中的应用及展望[J].锻压技术,2005,30(2):71-74.
[6]陈磊,杨继昌,陈炜,等.变压边力方式对板料U形回弹影响的有限元模拟研究[J].塑性工程学报,2005,12(5):12-16.
[7]陈磊,杨继昌,陈炜,等.考虑接触演变的板料回弹过程建模与优化[J].机械工程学报,2005,41(11):189-193.
|
|
服务与反馈：
|
|
【本网站尚未开通全文下载服务】【加入收藏】
|
|
|
|
