Transactions of Materials and Heat Treatment

Title：Simulation and experiment analysis of inner bulging and push bending process for thin-wall tubes with small radius

Authors： Meng Zhongliang1 Lu Yupeng2 Yu Jianglong3

Unit： 1.Zaozhuang University 2. Yonker Environmental Protection Co. Ltd. 3.Guizhou University

KeyWords： inner bulging and push bending fracture bending radius die structure

ClassificationCode：

year,vol(issue):pagenumber：2015,40(4):116-120

Abstract：

For three kinds of specification pipes of Φ10 mm×1 mm、Φ20 mm×1 mm、Φ30 mm×1 mm, bending experiments were conducted by the traditional methods of bending, roll bending and CNC bending. In view of the fracture, inside wall thickening, outside wall thinning，wrinkling and poor ovality etc. existed in the traditional methods processing，push bending die was designed. The inner bulging and push bending model was establish and simulated by the Deform software. During the simulation, the thickness change curves were obtained through data collection for three kinds of specification pipes with different inner pressures, then three curves with small fluctuation were selected to compare. Finally, the inner pressure of the best simulation effect was determined. Based on the simulation results, experiments of inner bulging and push bending process based on three kinds of specification pipes were carried out. The results show that the problems of uneven thickness of inside and outside wall, wrinkling and fracture for bending tubes with small radius are well solved by the above method.

Funds：

贵州省重大专项课题基金（20116017）

孟忠良（1981-），男，硕士研究生

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