Transactions of Materials and Heat Treatment

Title：Research of mechanics on compound forming of bulging and extrusion multi-branch tubes

Authors： Huazhong University of Science and Technology Yang Yuchun Xia Juchen Hu Guoan

Unit：

KeyWords： Multi- branch tubes Compound forming of bulging and extrusion Large strain Forming limit

ClassificationCode：TG376

year,vol(issue):pagenumber：1997,22(4):26-30

Abstract：

The paper gives a new kind of method to form the tube directly in the compound process of bulging and extrusion with a polyurethane bar,which uses the plastic theory of metal forming to ana- lyze the forming processes.To get the distribution laws of stress and strain and to obtain the process parameters when the branch is the longest,the method of“the strain samples”is putup.The relation- ship among the forming forces was discussed.It ought to be suitable to make forming metal in a very strong pressure and appropriate partial stress state in order to get the longest branch.

Funds：

塑性成形模拟及模具技术国家重点实验室开放基金资助

Reference：

1　皮萨林科 ,列别捷夫著 ,江明行译 .复杂应力状态下的材料变形与强度 .北京 :科学出版社 ,1983.
2　刘么和 ,胡世光 .板料的 n、R值对应力应变分布的影响 .锻压技术 ,1983,8(2 ) .
3　H JKim,B H Jeon,H Y Kim and JJKim.Finite El-ement Analysis of the L iquid Bulge Forming Processes.Ad-vanced Technology of Plasticity,1993.
4　Wang Tonghai,Su Shang,Mo Dexiu.The Researchof Tube Bulging Using Polyurethang under Compound Exter-nal Force and Its Application.Advanced Technology of Plas-ticity,1993.

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