• Title/Summary/Keyword: Horizontal Force of Work Roll

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Analytical and Numerical Investigation of Horizontal Force and Stable Position of Work Roll in Backup-Roll-Drive 4-High Cold-Rolling Mill (보강롤 구동 4 단 냉간압연기에서 작업롤의 수평하중 거동분석과 안정위치 결정을 위한 해석적 및 수치적 고찰)

  • Byon, Sang-Min;Lee, Jae-Hyeon;Park, Heung-Sik
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.35 no.9
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    • pp.977-982
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    • 2011
  • The horizontal force acting on a work roll was examined. This force results from the contact force between the work roll and backup roll in a backup-roll-drive 4-high cold-rolling mill. This horizontal force bends the work roll horizontally and therefore exerts reciprocal action on the roll-gap contour. An analytical model for predicting the horizontal force acting on a work roll, which generates a mean value in the steady state, was presented. The material used for the analysis was high-silicon steel (about 3% Si). A three-dimensional finite element (FE) model was also employed to investigate the non-steady-state behavior of the horizontal force. Results showed that the horizontal force varied with the off-center distance between the work roll and backup roll. In addition, the optimal off-center distance was determined to minimize the horizontal force.

Prediction of Proper Horizontal Position of Work Roll in Backup Roll Driven-type Cold Rolling Mill (보강롤 구동 냉간압연기에서의 적정 작업롤 수평위치 설정기법 개발)

  • 변상민;이원호
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • 2003.05a
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    • pp.160-163
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    • 2003
  • For the purpose of rolling hard metals such as silicon steel and non-ferrous metals, the backup roll driven-type mill has been widely used in cold rolling industry. Since the backup roll drive results in horizontal bending of the work rolls and therefore exerted reciprocal action on the roll gap contour, the selection of slim work rolls is very restricted. In this paper, we present an analytic equation based scheme to determine a proper horizontal position of work roll minimizing the horizontal force subject to mechanical constraints.

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FEM Based Approach to Predict Rolling Force and Strip Thickness in 4-High Cold Rolling Mill Driven by Backup-Roll (유한요소법을 이용한 보강롤 구동 4단 냉간압연기에서의 압연하중 및 스트립 두께 예측)

  • Lee, Jae-Hyun;Byon, Sang-Min;Park, Heung-Slk
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.8 no.4
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    • pp.129-135
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    • 2009
  • In this paper, a finite element model is presented for the prediction of roll force and strip thickness in a backup-roll-drive mill. The proposed FE model is focused mainly on analyzing the elastic/plastic behavior between a work roll and a strip as well as the rigid/plastic behavior between a backup roll and a work roll. The capability of the proposed model is demonstrated through application to 4-high silicon steel rolling mill at POSCO. Results show that the predicted roll force and strip thickness rolled accurately agree with the measured them. It is also illustrated that the proper position of work roll displaced to one side from the vertical centerline of the backup-roll may be determined by minimizing the horizontal force of work roll.

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