|
Abstract：
|
|
Unequal earing often happens in forming with hot rolled deep-drawing steel, which will influence the product quality and the production. By studying the real process of a part, it was found that the reason of its crack was due to unequal earing. Then simulation model was built and the simulation results show that the anisotropy and unequal thickness of the blank would result in unequal earing. Based on the concurrence of anisotropy and unequal thickness, the influence of process parameters and die parameters on unequal degree of earing was studied. The results show that the unequal degree of earing increases with the increase of the binder force , the punch radius or die radius, and decreases with the increase of the friction or the die gap. At last, adjusting the forming process of the cracked part according to the results, the crack problem was improved.
|
|
Funds：
|
|
|
|
AuthorIntro：
|
|
|
|
Reference：
|
[1]陈宇,钟定忠,刘家宁,等.热轧酸洗深冲钢板组织和性能及其应用[J].钢铁,2000,35(3):39-43.
[2]陈宇,钟定忠,谢华,等.热轧深冲钢板的分析和应用[J].钢铁,2000,35(8):37-39.
[3]程万军,何忠保,王学寰,等.各向异性屈服准则在拉深工艺中的应用[J].塑性工程学报,2001,8(2):55-56.
[4]Zaky A M,Nassr A B,El-Sebaie M G.Opti mum blank shape of cylindrical cups in deep drawing of anisotropic sheet metals[J].Journal of Materials Processing Technology,1998,76:203-211.
[5]Chen X,Sowerby R.Blank development and the prediction of earingin cup drawing[J].Int.J.Mech.Sci.,1996,8(5):509-516.
[6]Naval Kishor,Ravi kumar D.Opti mization of initial blank shape to mini mize earingin deep drawing using finite element method[J].Journal of Materials Processing Technology,2002,130-131:20-30.
[7]劭鹏飞,王秀喜,车玖,等.塑性各向异性板料本构关系及冲压成形的数值模拟[J].力学,2000,21(4):470-475.
[8]吕庆功,陈光南,周家琮,等.深冲钢板的主要织构对塑性应变比的影响[J].钢铁研究,2000,(5):40-43.
[9]肖景容,姜奎华.冲压工艺学[M].北京:机械工业出版社,1990.
[10]梁炳文,陈孝戴,王志恒.板金成形性能[M].北京:机械工业出版社,1999.
[11]梁炳文,胡世光.板料成形塑性理论[M].北京:机械工业出版社,1987.
|
|
Service：
|
|
【This site has not yet opened Download Service】【Add
Favorite】
|
|
|
|
Copyright Forging & Stamping Technology.All rights reserved