Transactions of Materials and Heat Treatment

Title：Deformation analysis and compensation technology of down-roll for four-roll plate bending press

Authors： Zheng Jiuhua Chang Xin Wang Xinyu Wu Kai Hou Jialin

Unit： Shandong Agriculture University Taian Hualu Metalforming Machine Tool Co. Ltd. Nanjing University of Science & Technology

KeyWords： four-roll plate bending down-roll deformation analysis FEA compensation

ClassificationCode：TP391.1

year,vol(issue):pagenumber：2018,43(2):0-0

Abstract：

Four-roll plate bending press has four work rolls，and the down-roll withstanding the largest force will lead the deformation obviously. Therefore, the problems of roller deformation leading to lack of precision and low productivity persists. Then, the force and deformation of down-roll were analyzed in theory, and the force deformation formula was derived. Furthermore, the compensation scheme was designed, and it was simulated by finite element analysis software ABAQUS.The simulation results show that compared with no compensation situation, the single roller support and double-roll support compensation methods have more compensation effect, and the deformation can be reduced at least 40%, namely the above two compensation methods are effective compensation schemes. Finally, the double-roll support compensation device is designed, and the production test is conducted. The results show that the straightness accuracy of workpiece is improved from ±5 mm to ±2 mm，the radial forming accuracy is improved from ±9 mm to ±3 mm, and the accuracy compensation effect is very obvious by the double roller support compensation device.

Funds：

国家国际科技合作专项资助（2015DFR70090）

作者简介：郑九华（1972-），男，博士，副教授 E-mail：zjh1882@163.com

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