Transactions of Materials and Heat Treatment

Title：Calculation model of deformation force for flaring of conical die

Authors： Chu Liang Xie Tan Zhong Zhiping

Unit： Beijing Research Institute of Mechanical and Electrical Technology Tianjin University of Technology

KeyWords： flaring deformation force additional bending principal stress method conical die semi-angle

ClassificationCode：TG386

year,vol(issue):pagenumber：2017,42(7):177-181

Abstract：

By analyzing the stress characteristics of material in deformation zone for flaring of conical die and comprehensively considering three important factors with essential deformation characteristics of material thickness thinning, difference of true stress-true strain curve of metal materials and influence of additional bending, a new set of theoretical formulas of flaring deformation force calculating of conical die was set up by the principal stress method, and the influence of additional bending on flaring deformation force was further researched. The results show that the influence of additional bending on flaring deformation force is mainly determined by the conical die semi-angle. Therefore, the influence of additional bending can be neglected when the conical die semi-angle is less than or equal to 25°, and the influence of additional bending can be considered when the conical die semi-angle is more than 25°. Furthermore, the application scope of theoretical formulas is classified by considering the conical die semi-angle and different true stress-true strain curve of metal materials.

Funds：

作者简介：褚亮（1979-），男，博士研究生，E-mail：chuliangszhm@163.com；通讯作者：谢谈（1953-）男，学士，研究员，E-mail：xietan@jds.ac.cn

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