Transactions of Materials and Heat Treatment

Title：Precise prediction of double flaring forming process of 5A02 aluminum alloy tube end by rotating-stamping

Authors： Peng Jiangtao1 2 Li Hongwei1 2 Zhan Mei1 2 Li Yiyan1 Wang Qiaoling3 Cao Jindou3 Li Guangjun3 Rong Jian3

Unit：

KeyWords：

ClassificationCode：TG386

year,vol(issue):pagenumber：2021,46(9):112-117

Abstract：

For the problem that it is difficult to clamp and form the end of double flaring tube, the rotating-stamping process of double flaring for tube end was used to reduce the forming force of double flaring for tube end. The finite element model of

the whole process consisted of double flaring forming by rotating-stamping and springback was established, which achieved accurate prediction of the double flaring forming for tube end. The results show that the clamping force required by holding the die can be reduced significantly to less than 10% (from 18 kN to 1 kN) for double flaring forming by rotating-stamping compared with double flaring forming by stamping. The phenomenon of the badly fittability in the neck of flaring is not obvious, which mainly occurs in the single flaring pass. The deformation state of the tube end after the inversion pass forming has a significant influence on the quality of the double flaring tube. Using the spinning roller of 2.0 mm≤ radius of rounded corners r≤3.0 mm and 85°≤half of cone angle φ≤90° to turn inward, a double flaring tube end of better quality can be formed.

Funds：

彭江涛（1996-），男，硕士研究生 E-mail：pengjiangtao212@163.com 通信作者：李宏伟（1978-），男，博士，教授 E-mail：lihongwei@nwpu.edu.cn

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