Transactions of Materials and Heat Treatment

Title：Finite element analysis on cross-section distortion in tube rotary draw bending based on variation of elastic modulus

Authors： Wan Tao1 Fang Jun1 Ouyang Fang2 Shang Wenxuan1 Lu Shiqiang2 Wang Kelu2

Unit： 1. Jiangxi Science and Technology Normal University 2. Nanchang Hangkong University

KeyWords： high-strength stainless steel tube rotary draw bending cross-section distortion rate elastic modulus multi-factor sensitivity analysis

ClassificationCode：TG386

year,vol(issue):pagenumber：2024,49(3):52-59

Abstract：

To realize the precise rotary draw bending forming of 0Cr21Ni6Mn9N high-strength stainless steel tube, the whole process finite element model of tube rotary draw bending considering the variation of elastic modulus was established, the impacts of process parameters on cross-section distortion during the tube rotary draw bending were investigated, and the sensitivities of cross-section distortion to process parameters were analyzed. The results indicate that when considering the variation of elastic modulus, the variation trend of cross-section distortion rate is basically the same with that without considering the variation of elastic modulus, but the value is relatively large and is closer to the experimental results. The cross-section distortion rate increases with the increasing of friction factor fm between tube and mandrel, clearance Cp between tube and pressure die, clearance Cm between tube and mandrel or with the decreasing of friction factor fp between tube and pressure die, axial feeding e of mandrel, and the cross-sedion distortion is most sensitive to e, followed by fm, Cm and fp, while that is least sensitive to Cp. The optimal process parameters range are as follows：fp=0.25-0.40、fm=0.05-0.15、Cp=0.075-0.100 mm、Cm=0.075-0.150 mm、e=0.5-2.0 mm.

Funds：

江西省自然科学基金资助项目（20192BAB216022）；江西省教育厅科学技术研究项目（GJJ201126,GJJ180615）

作者简介：万涛（1974-），男，学士，讲师,E-mail：490255128@qq.com;通信作者：方军（1984-），男，博士，副教授,E-mail：fangjun020j13@163.com

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