Numerical analysis and control method for wrinkling of curved surface parts in flexible rolling forming

FU Wen-zhi; WANG Yu; LI Ming-zhe; CHEN Jun; DENG Yu-shan

doi:10.3788/OPE.20162413.0407

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Numerical analysis and control method for wrinkling of curved surface parts in flexible rolling forming

更新时间：2020-08-13

- Numerical analysis and control method for wrinkling of curved surface parts in flexible rolling forming
- Optics and Precision Engineering Vol. 24, Issue 10s, Pages: 407-414(2016)
- 作者机构：
  
  1. 吉林大学辊锻工艺研究所,吉林长春,130022
  2. 吉林大学材料科学与工程学院,吉林长春,130022
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20162413.0407
  CLC： TG306
- Received：20 April 2016，
  
  Revised：27 May 2016，
  
  Published：14 November 2016
- 稿件说明：
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付文智, 王妤, 李明哲等. 柔性轧制成形中曲面件起皱的数值分析与控制方法[J]. 光学精密工程, 2016,24(10s): 407-414

FU Wen-zhi, WANG Yu, LI Ming-zhe etc. Numerical analysis and control method for wrinkling of curved surface parts in flexible rolling forming[J]. Editorial Office of Optics and Precision Engineering, 2016,24(10s): 407-414
付文智, 王妤, 李明哲等. 柔性轧制成形中曲面件起皱的数值分析与控制方法[J]. 光学精密工程, 2016,24(10s): 407-414 DOI： 10.3788/OPE.20162413.0407.

FU Wen-zhi, WANG Yu, LI Ming-zhe etc. Numerical analysis and control method for wrinkling of curved surface parts in flexible rolling forming[J]. Editorial Office of Optics and Precision Engineering, 2016,24(10s): 407-414 DOI： 10.3788/OPE.20162413.0407.

摘要

阐述了柔性轧制成形机理，曲面柔性轧制成形依靠柔性辊间特殊形态的辊缝，使得板材在成形过程中发生双向弯曲。为了探究柔性轧制成形起皱规律，有效控制柔性轧制成形中曲面件的起皱缺陷，以球形件为例，对不同曲率半径的球形件轧制过程进行数值模拟分析，分析结果表明，成形半径从1 000 mm减小到300 mm时，最大皱纹高度从0.24 mm增大到2.85 mm。随着成形件曲率半径减小，板料宽度方向金属变化越大，塑性变形越不均匀，越容易发生起皱。并探讨多道次轧制成形规律，采用多道次柔性轧制成形工艺能有效预测与控制皱纹。在试验机上进行了试验验证，使用光学测量仪对试验件进行三维型面测量，得到点云数据，结合逆向曲面造型技术完成对实验件的型面分析，试验结果与模拟结果基本吻合。

Abstract

Set forth the flexible rolling forming mechanism:the flexible rolling forming surface relies on the roll gap of special shape between the flexible rollers to achieve bi-directional bending of the plates during formation. Purpose:to study the wrinkling law during the flexible rolling forming process

and effectively control the wrinkling of surfaces. Take spherical parts for an example

and carry out numerical analysis on the rolling process of spherical parts with different curvature radius. The analysis results indicate that the maximum wrinkle height increases from 0.24 mm to 2.85 mm when the radius of the formed parts decreases from 1 000 mm to 300 mm. As radius of the formed parts decreases

changes to metal in the width direction of the plates will be larger; and as the plastic deformation becomes more uneven

the surface is more likely to wrinkle. The paper has also discussed the multi-step rolling forming laws

which can help effectively predict and control the wrinkles. Method:carry out the experimental verification in the tester

conduct a 3D molded surface measurement in the test pieces with optical instrument to obtain the point cloud data

and then complete the molded surface analysis in the test piece by combining the reverse surface modeling technology. The test results are basically consistent with the simulation results.

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Keywords

references

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CAI Z Y, SUI Z, CAI F X, et al.. Continuous flexible roll forming for three-dimensional surface part and the forming process control[J]. The International Journal of Advanced Manufacturing Technology, 2013, 66(1-4):393-400.

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龚学鹏, 李明哲, 胡志清. 连续多点成形过程中起皱缺陷的有限元分析[J]. 机械工程学报, 2010,46(22):31-35. GONG X P, LI M ZH, HU ZH Q. Finite element analysis on wrinkle during process of continuous multi-point forming[J]. Journal of Mechanical Engineering, 2010,46(22):31-35. (in Chinese)

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CAI Z Y, LI M Z. Principle and theoretical analysis of continuous roll forming for three-dimensional surface parts[J]. Science China Technological Sciences, 2013, 56(2):351-358.

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Related Institution

Optoelectronic Manufacturing Engineering Center， Shanghai Institute of Technical Physics， Chinese Academy of Sciences

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Institute of Precision Optical Engineering， School of Physics Science and Engineering， Tongji University

School of Mechanical Engineering， Tongji University

College of Mechanical Engineering and Automation， Huaqiao University

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