Transactions of Materials and Heat Treatment

Title：Analysis on hoop-bending springback angle and hooping precision for high strength steel bar

Authors： Shang Zhongping Liu Zhiliang Chen Kangyuan

Unit： Yanshan University

KeyWords： high strength steel bar hoop-bending springback angle hooping angle hoop-bending speed turning radius of the hoop-bending axis

ClassificationCode：TG316

year,vol(issue):pagenumber：2017,42(1):155-160

Abstract：

When high strength steel bar hoop is bent into a certain angle in the hoop-bending machine, it can produce springback under the action of residual stress. Therefore, springback angle should be taken into consideration in order to improve the precision of hooping angle. According to springback elastic-plastic theory and considering the influence of work hardening, the relationship between hooping angle and springback angle was deduced, and the relationship between rotation angle and hooping angle was obtained based on the geometric model of hoop-bending rotary table. Furthermore, the model of hoop-bending was established by the finite element analysis software MARC, and the influence of hoop-bending speed and trurning radius of the hoop-bending axis on springback angle was analyzed. Finally, hoop-bending experiments were carried out. The results show that the hoop-bending speed has little effect on the springback angle, and the springback angle increases with the increase of turning radius of the hoop-bending axis. At the same time, the finite element simulation results are consistent with the experimental results.

Funds：

秦皇岛市科学技术研究与发展计划项目(201502A013)

尚仲平（1964-），男，硕士，副教授 E-mail：WSQ3885061@126.com 通讯作者：刘志亮（1962-），男，博士，副教授 E-mail:zhiliangliu@ysu.edu.cn

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