Journal of the Korean Society of Manufacturing Process Engineers (한국기계가공학회지)

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
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A Study of Spring-back Effect According to the Number of Roll Passes in the Roll Forming Process

롤 포밍 공정에서의 롤 패스의 수에 따른 스프링 백 영향 연구

  • Kim, Dong-Hong (Department of Mechanical Engineering, JEJU NATIONAL UNIV.) ;
  • Zhang, Ya (Department of Mechanical Engineering, JEJU NATIONAL UNIV.) ;
  • Jung, Dong-Won (Department of Mechanical Engineering, JEJU NATIONAL UNIV.)
  • 김동홍 (제주대학교 기계공학과) ;
  • 장애 (제주대학교 기계공학과) ;
  • 정동원 (제주대학교 기계공학과)
  • Received : 2015.08.11
  • Accepted : 2015.09.07
  • Published : 2016.02.29
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Abstract

This study was analyed V-bending in order to analyze the spring-back phenomenon in the roll forming process. The material of forming sheet used in the roll forming process is high tension steel and the product name of sheet material is POSTEN 60. The most important variable is the number of roll passes (3-Pass, 4-Pass, 5-Pass, 6-Pass and 10-Pass) and other roll forming process variables were fixed. To determine the characteristics of the tension and compression, the forming sheet was analyzed by dividing the layer (Upper and Bottom) in the thickness direction from the center line. The results of FEM simulation analysis was derived to von-mises stress equivalent strain, and the spring-back value was calculated according to the final forming shape. The more number of the roll pass, von-mises stress and equivalent strain value of forming sheet were lowed. Also, spring-back values tended to decrease. The results of this study can be utilized for prediction and trend of spring-back value in the roll forming process applied to high tension steel sheet. So, development time and cost of the roll forming process is expected to be reduced.

Keywords

Acknowledgement

Supported by : 한국연구재단

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