Transactions of Materials and Heat Treatment

Title：Influence of workpiece thickness non-uniformity on curvature radius for roll bending

Authors： Zheng Zijun Tao Yumei

Unit： College of Mechanical Engineering Chongqing University of Technology

KeyWords： roll bending Eulerian grid Monte-Carlo method Euler beam random error

ClassificationCode：TG38

year,vol(issue):pagenumber：2022,47(9):58-65

Abstract：

Due to the influence of manufacture process, the thickness of original workpiece is nonuniform, which can affect the shape of roll bending product. A finite element model based on Eulerian grid was proposed to conduct the Monte Carlo simulation of three-roll bending process, in which the local thickness of workpiece had normal-distributed error. Comparing with the conventional Lagrangian grid finite element model, the roll bending simulation scheme could reduce the grid number and simplify the contact treatment obviously. Then the statistic laws of curvature radius for roll forming was analyzed, and experiments of relationship between blank thickness non-uniformity and curvature radius of roll bending were conducted by using the 3D printing. The results show that with the increasing of blank thickness non-uniformity, the distribution of local radius for product gets wider, and the macro radius of product becomes smaller, which is verified by the experimental result. For a given goal produce shape, the influence of blank thickness non-uniformity on roll bending is more significant when a smaller roller distance or a thinner nominal thickness is employed.

Funds：

国家自然科学基金青年科学基金资助项目（11702046）；重庆市教委科学研究项目（KJ1600910）

郑子君（1985-），男，博士，副教授 E-mail：zhengzi@cqut.edu.cn

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