Transactions of Materials and Heat Treatment

Title：Influences of tube blank parameters on section distortion for metallic thin-walled tube with “目”-shaped section in rotary draw bending

Authors： Wang Xiaozhuo Niu Weizhong

Unit： School of Mechanical Engineering Lanzhou Jiaotong University

KeyWords： tube with "目"-shaped section rotary draw bending tube blank section distortion wall-thickness thinning

ClassificationCode：TG386.43

year,vol(issue):pagenumber：2024,49(11):30-36

Abstract：

In order to study the influences of material and size parameters of tube blank on the section distortion of metallic thin-walled tube with "目"-shaped section in rotary draw bending, the rotary draw bending process of six groups and nineteen types of tube blanks were respectively simulated by finite element analytical software ABAQUS, and the general pattern of section distortion for these bent tubes and the maximum reduction rate of three sizes for each bent tube were obtained. The results show that after rotary draw bending, the section of tube blank with "目"-shaped section usually becomes trapezoid, and the maximum value of wall-thickness reduction rate for bent tube is generally higher than that of top-width reduction rate and section-height reduction rate. Choosing the tube material with smaller yield-strength ratio or the tube blank with smaller section height help to reduce section distortion and wall-thickness thinning of bent tube, and taking the well-designed tube blank with "目"-shaped section to replace the rectangular the section or "日"-shaped section can significantly suppress the section distortion of bent tubes, but it is difficult to improve the thinning of the wall thickness for top plate.

Funds：

作者简介：王小卓（1995-），男，硕士研究生 E-mail：812018349@qq.com 通信作者：牛卫中（1962-），男，硕士，教授 E-mail：nwz@mail.lzjtu.cn

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