不同宽度板带拉矫的弯曲单元辊盒结构载荷数值分析

Numerical analysis of structural load of the bending unit roll box in tension-leveling with different strip widths

摘要

为了研究板带宽度对拉矫设备承载的影响，运用多跨连续梁模型，理论推导了不同板带宽度下弯曲单元辊系结构的载荷分布特点。针对“两弯两矫”设备，结合基于显式动力学的拉矫工艺分析和基于隐式动力学的辊盒结构载荷分析，计算了3种板带宽度下弯曲辊盒的极限结构载荷。结果表明:板带宽度的变化会引起辊盒结构最大应力及其位置的改变:当板宽不超过支承辊的支承总长时，辊盒最大应力出现在支承辊与辊座传力处，约为115 MPa；当板宽大于支承辊的支承总长时，辊盒最大应力转移至中间辊与端部支承辊接触处，约为205 MPa。

Abstract

With the multi-span continuous beam model，the load distribution characteristics of the roller system structure in the bending unit are theoretically derived in order to investigate the impact of strip width on the load bearing of the tension-leveling equipment. For the tension-leveling equipment with two bending units and two straightening units，depending on the process analysis based on explicit dynamics and the structural load analysis based on implicit dynamics，the structural load of the bending roller box is calculated for three kinds of strip width. The result shows that with strip width not exceeding the support length，the maximum stress，located on the back-up roll in contact with the roller seat，is approximately 115 MPa，and with strip width exceeding the support length，the maximum stress，located on the intermediate roll in contact with the back-up roll，is approximately 205 MPa.

关键词

拉矫机辊盒 / 板宽 / 有限元分析 / 多跨连续梁模型

Key words

roller box of the tension-leveling equipment / strip width / finite element analysis / multi-span continuous beam model

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基金资助

国家自然科学基金资助项目(52205537)

湖北省教育厅科学技术研究计划资助项目(B2022008)

材料成形与模具技术国家重点实验室开放基金资助项目(P2022-012)