7075铝合金厚板多道次蛇形热轧的分析与预测

秦国华; 杨扬; 李强; 林锋

doi:10.3788/OPE.20172504.0969

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7075铝合金厚板多道次蛇形热轧的分析与预测

微纳技术与精密机械 | 更新时间：2020-07-07

- 7075铝合金厚板多道次蛇形热轧的分析与预测
- Analysis and prediction of multi-pass snake hot rolling for 7075 aluminum alloy thick plate
- 光学精密工程 2017年25卷第4期页码：969-978
- 作者机构：
  
  南昌航空大学航空制造工程学院, 江西南昌 330063
- 作者简介：
  
  秦国华 (1970-), 男, 江西南昌人, 博士后, 教授, 2002年、2005年于西北工业大学分别获得硕士、博士学位, 2009年于西北工业大学力学博士后流动站出站, 现为南昌航空大学教授, 主要从事工件装夹分析与优化、加工过程建模与仿真、残余应力分析与预测、健康诊断与故障预测、刀具磨损检测与分析、制造业信息化技术等方面的研究。E-mail:qghwzx@126.com QIN Guo-hua, E-mail:qghwzx@126.com
- 基金信息：
  
  国家自然科学基金资助项目(No.51465045);国家自然科学基金资助项目(No.51165039);江西省主要学科学术和技术带头人资助计划;航空科学基金资助项目(No.2016ZE56011);江西省自然科学基金资助项目(No.20161BAB206114);深圳市科技创新委员会基础研究项目(No.JCYJ2014050917410668)
- DOI：10.3788/OPE.20172504.0969
  中图分类号： V252.22:TG335.11
- 收稿日期：2016-09-21，
  
  录用日期：2016-12-27，
  
  纸质出版日期：2017-04-25
- 稿件说明：
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秦国华, 杨扬, 李强, 等. 7075铝合金厚板多道次蛇形热轧的分析与预测[J]. 光学精密工程, 2017,25(4):969-978.

Guo-hua QIN, Yang YANG, Qiang LI, et al. Analysis and prediction of multi-pass snake hot rolling for 7075 aluminum alloy thick plate[J]. Optics and precision engineering, 2017, 25(4): 969-978.
秦国华, 杨扬, 李强, 等. 7075铝合金厚板多道次蛇形热轧的分析与预测[J]. 光学精密工程, 2017,25(4):969-978. DOI： 10.3788/OPE.20172504.0969.

Guo-hua QIN, Yang YANG, Qiang LI, et al. Analysis and prediction of multi-pass snake hot rolling for 7075 aluminum alloy thick plate[J]. Optics and precision engineering, 2017, 25(4): 969-978. DOI： 10.3788/OPE.20172504.0969.

摘要

研究了蛇形轧制工艺参数对铝合金厚板变形与残余应力分布的影响。基于蛇形轧制的咬入条件与本构模型以及边界条件等关键技术，构建了铝合金厚板的单道次蛇形轧制有限元模型，并与相关文献的仿真结果进行了比较，结果显示其相对误差不超过10%。考虑最小、最大压下量均相等的条件下压下量分配对蛇形轧制的影响，建立了多道次蛇形轧制的有限元模型并进行了仿真实验。结果表明：铝厚板应变不是按板厚中心面呈对称分布，慢速辊一侧的应变明显小于快速辊一侧，而且压下量对称递增分配产生的应变最大，单向递增分配产生的应变最小，对称递增比单向递增分配压下量产生的应变平均要高出20%左右。此外，压下量对称递减分配引起的剪切应变最大，单向递增分配引起的剪切应变最小，对称递减分配比单向递增分配压下量产生的剪切应变要高出2倍。

Abstract

The effects of process parameters in a snake hot rolling on the deformation and residual stress distribution of an aluminum alloy thick plate were explored. On the basis of the bite conditions of snake rolling

constitutive model

boundary conditions and other critical technologies

a finite element model of single-pass snake rolling for the aluminum alloy thick plate was established. The simulation results were compared with that of corresponding literatures

and it shows that the relative error is no more than 10%. In condition of the influence of pass reduction distribution on snake rolling at both minimum and maximum pass reductions being equal

the finite element model of multi-pass snake hot rolling was established and a simulation experiment was performed. The result shows that the equivalent strain of aluminum thick plate is not symmetrically distributed in accordance with the central surface; the equivalent strain near the slow roller is obviously smaller than that near the high-speed roller. Moreover

the maximum equivalent strain is generated from the symmetrical increasing distribution of pass reduction and the minimum equivalent strain is generated from one-way increasing distribution. The equivalent strain generated from symmetrical increasing distribution of pass reduction is averagely 20% larger than that generated from one-way increasing distribution. Furthermore

the shear strain generated from symmetrical decreasing distribution is twice that from one-way decreasing distribution

in which the former is the maximum and the latter is the minimum.

关键词

Keywords

references

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