|
摘要：
|
|
针对变径薄壁零件粘性介质外压缩径方法,采用理论和有限元方法分析了粘性介质压力场分布、坯料几何形状及应力与应变的变化,并与试验结果进行对比。研究结果表明,粘性介质适应坯料失稳褶皱形貌产生不均匀的压力场,并在较高压力条件下消除褶皱;试件壁厚减薄,最大减薄率为4.3%,变形方式由压缩类变形向伸长类变形转变。
|
|
In consideration of necking method of thin-wall parts with variable diameter under viscous medium outer pressure,the pressure field distribution in the viscous medium,the geometrical shape and the stress and strain variation in the specimen were analyzed by theoretical method and finite element method,which were compared with experimental results.Research results show that the viscous medium can give rise to the nonuniform pressure distribution and adapt to variation of wrinkles of the buckling specimen,which eliminates the wrinkles under high pressure.The maximum reduction rate of the specimen wall-thickness is 4.3%,and the deformation evolves from the compression mode to the tension mode.
|
|
基金项目：
|
|
国家自然科学基金资助项目(50275035)
|
|
作者简介：
|
|
|
|
参考文献：
|
[1]Dong-Kyun Min,Dong-Won Kim.A finite element analy-sisof the electromagnetic tube-compression process[J].Journalof Materials Processing Technology,1993,38:29-40.
[2]夏琴香,邝卫华,阮锋.筒形件三旋轮缩径旋压过程的数值模拟[J].锻压技术,2005,30(1):44-46.
[3]村越庸一,高橋正春,佐野利男,等.電磁成形法の研究(Ⅱ)——磁束集中器による縮管成形[J].機械技術研究所所報,1985,39(6):254-264.
[4]李恒,杨合,詹梅,等.薄壁件塑性成形失稳起皱的国内外研究进展[J].机械科学与技术,2004,23(7):837-842.
[5]梁炳文,胡世光.弹塑性稳定理论[M].北京:国防工业出版社,1983.
[6]高铁军,王忠金,邓建懂.缩径区长度对粘性介质外压缩径成形的影响[J].锻压技术,2007,32(5):23-26.
[7]高铁军,王忠金,宋辉.1Cr18Ni9Ti薄壁曲面件粘性介质内、外压力成形[J].塑性工程学报,2006,13(3):40-43.
[8]刘建光,王忠金,高铁军.板材粘性介质压力成形粘性附着力影响因素试验研究[J].机械工程学报,2006,42(10):146-150.
[9]夏巨谌.精密塑性成形工艺[M].北京:机械工业出版社,1999.
|
|
服务与反馈：
|
|
【本网站尚未开通全文下载服务】【加入收藏】
|
|
|
|
