Transactions of Materials and Heat Treatment

Title：New upper bound model for extrusion/drawing processes through conical die

Authors： (Beijing Institute of Aeronautical Materials) Hu Chengcai(Northwest Polytechnical University ) Luo Zijian

Unit：

KeyWords： Conical die Extrusion/drawing Upper bound model

ClassificationCode：TG37

year,vol(issue):pagenumber：1997,22(2):6-9

Abstract：

A new upper bound model is proposed for extrusion/drawing processes through conical die. The proposed model according to upper bound approach covers all of the situations in which the entry and exit boundaries of deformation zone are assumed to be conical. The influences of the process parameters on the extrusion/drawing processes through conical die are revealed by using the model through the proper numarical methods and minimization technique. The forming of the dead zone and work-hardening can be taken into consideration by the model presented in the paper.

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Reference：

1 B Avitzur. Metal Forming: Processes and Analysis.Robert E. Krieger Publishing Co, Huntingtion New York,1979.
2BAVitzuu.Limit Analysis in Metal Forming-AppliCa-tion to the Flow tnrough Conical Converging Dies, Manufac-turing Solutions Based on Engineering Sciences.Proc.of theWinter Annual Meeting of the ASME,ed.L.Kops,Wash-ington, D. C, November 15-20, 1981, pp 167-197
3 ManuelJM Barata Marques, Paulo A F Martins andIorge M C Rodrigues. Hot Forging of Shells: An UpperBound Approach .J. of Mater,, Proc.Tech.Vol 21, 1990,PP.65-73。
4罗子健等编著.金属塑性成形原理.西安:西北工业大学出版社,1989·

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