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Prediction of Three-Dimensional Strip Profile for 6-High Mill in Thin-Strip Rolling

6 단 압연기의 극박 압연공정에서 3 차원 판 형상 예측

  • Lee, Sang-Ho (Dept. of Precision Manufacturing Systems Engineering, Pusan Nat'l Univ.) ;
  • Song, Gil-Ho (Rolling technology research group, POSCO) ;
  • Lee, Sung-Jin (Rolling technology research group, POSCO) ;
  • Kim, Byung-Min (School of Mechanical Engineering, Pusan Nat'l Univ.)
  • 이상호 (부산대학교 정밀가공시스템) ;
  • 송길호 (POSCO 압연공정연구그룹) ;
  • 이성진 (POSCO 압연공정연구그룹) ;
  • 김병민 (부산대학교 기계공학부)
  • Received : 2010.09.30
  • Accepted : 2011.05.23
  • Published : 2011.08.01

Abstract

We predict the rolled-strip profile for a 6-high mill using thin rolling theory and a numerical model. In the numerical model, we calculate the distributions of the contact pressures between the rolls and the rolling pressure between the strip and the work roll in the transverse direction using the geometric structure of the 6-high mill and the boundary conditions. We determine the distribution of the rolling pressure in the rolling direction via a thin-foil rolling model using Fleck's theory. We calculate the three-dimensional elastic deformation of the work roll using the pressures of the width and rolling directions. We then obtain the three-dimensional strip profile via the elastic deformation of the work roll during the rolling process. The profile is verified by a thin cold-rolling test and FE simulation.

Keywords

6 High-Mill;Rolling Force;Thin Cold Rolling;3-Dimensional Strip Profile;Hertz Theory

Acknowledgement

Grant : 중기거점기술개발사업

References

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  1. Effect of Shape Design Variables on Flexibly-Reconfigurable Roll Forming of Multi-curved Sheet Metal vol.23, pp.2, 2014, https://doi.org/10.5228/KSTP.2014.23.2.103