Transactions of Materials and Heat Treatment

Title：Calculation of displacement and numerical simulation on side roller in four-roller continuous roll bending

Authors： Zhou Chi Sun Yu Liu Qingyin Chang Xin Wu Kai Sheng Yulong

Unit： Nanjing University of Science and Technology Taian Hualu Metalforming Machine Tool Co. Ltd.

KeyWords： four-roller continuous roll bending springback bending radius side roller feed numerical simulation

ClassificationCode：TG335

year,vol(issue):pagenumber：2017,42(7):36-42

Abstract：

The curvature of rolled workpiece mainly depends on the displacement of side roller in the process of four-roller continuous roll bending. Therefore, the deformation of plate during the process of four-roller continuous roll bending was analyzed theoretically based on the theory of plastic bending. Then, according to the unloading theorem, the formula of springback curvature of bilinear hardening model plate was derived, and a mathematical model for calculating the side roller displacement in the process of four-roller continuous roll bending was established. Furthermore, the three-dimensional dynamic simulation of four-roller continuous roll bending process was carried out by the ABAQUS FEM software, and the relationships between side roller feed, relative bending radius and forming curvature radius with different plate thicknesses were analyzed by comparing simulation values with theoretical values. The results show that the finite element simulation error is small, so it can effectively guide the practice. With the increase of side roller feed, the influence of plate thickness on the forming curvature radius decreases gradually, and the forming curvature radius is basically linear with the increase of relative bending radius.

Funds：

国家国际科技合作专项项目（2015DFR70090）

作者简介：周迟（1993-），男，硕士研究生，E-mail：zhouchi1028@163.com；通讯作者：孙宇（1964-），男，博士，教授，E-mail: sunyu@mail.njust.edu.cn

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