Transactions of Materials and Heat Treatment

Title：Influence law of width effect in forming process of four-roller bending plate

Authors： Zhou Hanqiong Wu Kai Sun Yu Chang Xin Ma Zhenglun Cheng Guoren

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

KeyWords： four-roller bending plate biaxial stretching barrel deformation width effect rolling

ClassificationCode：TG335

year,vol(issue):pagenumber：2019,44(11):43-50

Abstract：

In the forming process of four-roller bending plate, the variation of plate width affects the quality of bending plate. Based on the elastoplastic bilinear hardening model, the relational formula between plate width, curvature and bending moment was derived, and the mathematical model of bending process for four-roller bending plate was established. Then, the calculation formula of forming curvature and side roller feeding amount was obtained, and according to the theoretical results, the influence of plate width effect on the bending process of plate was analyzed. The result shows that in the center of wide plate, there are unfavorable biaxial stretching conditions to increase the forming difficulty of plate, and the plate width variation affects the minimum bending radius of plate. With the increasing of plate width, the forming force and driving torque required for plate increase, and the barrel is prone to barrel deformation. Furthermore, the forming process of four-roller bending plate was simulated. And the finite element simulation result shows that the maximum stress of plate, the forming force of roller and the driving torque are reduced by multi-pass rolling of wide plate, and the influence of plate width effect on the forming process of four-roller bending plate is effectively controlled.

Funds：

国家国际科技合作专项项目（2015DFR70090）

周晗琼（1996-），女，硕士研究生，E-mail：576092306@qq.com；通讯作者：武凯（1972-），男，博士，教授，E-mail：wukai@njust.edu.cn

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