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Pass Schedule Design to Inhibit Surface Cracks Generation on Workpiece in Groove Rolling Process

공형압연 공정에서 소재 표면흠 발생억제를 위한 패스 스케줄 설계

  • Received : 2010.03.16
  • Accepted : 2010.08.02
  • Published : 2010.10.01

Abstract

We simulated the roughing train of the rod mill of SEAH BESTEEL Inc. using finite element method to inhibit surface cracks initiation on workpiece. We designed 2nd pass (square roll) and applied to this roll in the roughing train of the rod mill. Also, we proposed new pass schedule, which changed roll gap of 3rd and 4th groove by using finite element method. We used shear damage model, which is dependent on shear stress ratio and compared the number of damaged elements on workpiece. A damaged element means surface crack. Consequently, after 2nd pass (square roll) is changed, the error rate decreased by 1.43% when compare to that of the old groove. And the number of damaged elements in the new pass schedule decreased by 37.6%, which is less than present pass schedule.

Keywords

Groove Rolling;Surface Cracks;Pass Schedule; Shear Damage Model;Shear Stress Ratio

Acknowledgement

Supported by : 세아그룹 해암학술재단((주)세아베스틸)

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