|
摘要：
|
|
钣制旋压带轮以其重量轻、生产效率高、节能、节材及动平衡性好等优点,在众多领域逐步取代以铸、锻等传统方法加工的带轮,得到广泛应用。本文深入分析了多楔带轮旋压成形特点,将其变形过程划分为增厚及旋齿两个变形阶段;基于增厚成形过程的重要性,采用有限元分析软件MSC.Marc对该过程预成形、腰鼓成形及增厚成形3个工步进行了数值模拟。结果表明,预成形时最大径向拉应变出现在缩径区,该区易产生成形缺陷;腰鼓成形以胀形为主要变形方式;增厚成形时径向应变以正应变为主、轴向及切向应变以负应变为主,体现为径向压缩、侧壁增厚的成形效果。在数值模拟结果的基础上,进行了工艺试验验证,结果吻合良好,验证了数值模拟分析的有效性。
|
|
With the advantages of light weight,high precision and economy and good dynamic characteristics,the pulleys manufactured by spinning instead of being manufactured by forging or casting are widely used in many fields. The forming characteristics during six-wedge poly-pulley spinning were analyzed. The spinning forming was divided into two processes:thickening and tooth forming. The FEA simulations of the thickening process during poly-pulley spinning,including performing,drumming and thickening,were carried out by MSC.Marc software due to the importance of this process in the whole spinning forming. It indicates that the maximum radial tensile strain exists at necking area of performing workpiece during performing,and forming defects also appear on this area easily. Bulging is the main deformation during drumming. Tensile strain is mainly in the radial direction and compressive strains are mainly in the axial and tangential directions during thickening,according to the forming effect of radial compression and thickening. On the basis of FEM simulation,the experiment was carried out to prove the results of FEM. The experimental results agree well with the results of simulation,which verifies the validity of simulation.
|
|
基金项目：
|
|
广东省省部产学研合作项目(2006D90304021)
|
|
作者简介：
|
|
|
|
参考文献：
|
[1]孙存福,陈企芳.带轮旋压技术的现状与发展[A].第七届全国旋压技术交流会议论文集[C].庐山,1996.
[2]王学伟,洪奕.皮带轮旋压的现状和未来[J].装备环境工程,1991,9(2):53-57.
[3]王忠清,杨东法.钣制旋压带轮在汽车行业中的发展及应用[J].锻压机械,1999,(1):7-9.
[4]林军,胡大桥.发动机风扇皮带轮齿形旋压加工试验研究[J].汽车工艺与材料,1997,(1):17-18.
[5]刘金年.汽车发动机V型皮带轮的旋压工艺[J].科技与经济,2006,(4):57-58.
[6]雷娜,刘军,吴齐芳,等.风扇皮带轮工艺改进[J].汽车科技,2002,(1):30-32.
[7]郭刚健.多V型带轮旋压工艺研究与成形质量分析[D].北京:北京航空航天大学,1995.
[8]谢世伟.多楔带轮旋压成形全流程数值模拟及工艺分析[D].广州:华南理工大学,2008.
[9]应富强,张更超,潘孝勇.金属塑性成形中的三维有限元模拟技术探讨[J].锻压技术,2004,29(2):1-5.
[10]夏琴香,尚越,程秀全.汽车轮毂端盖拉伸成形模计算机辅助工程[J].模具工业,2006,32(2):23-26.
[11]陈火红.MARC有限元实例分析教程[M].北京:机械工业出版社,2002.
[12]夏琴香,杨明辉,胡昱,等.杯形薄壁矩形内齿旋压成形数值模拟与试验[J].机械工程学报,2006,42(12):192-196.
|
|
服务与反馈：
|
|
【本网站尚未开通全文下载服务】【加入收藏】
|
|
|
|
