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Effect of clearance and inclined angle on sheared edge and tool failure in trimming of DP980 sheet
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  • Effect of clearance and inclined angle on sheared edge and tool failure in trimming of DP980 sheet
  • Effect of clearance and inclined angle on sheared edge and tool failure in trimming of DP980 sheet
저자명
Choi. Hong-Seok,Kim. Byung-Min,Ko. Dae-Cheol
간행물명
Journal of mechanical science and technology
권/호정보
2014년|28권 6호|pp.2319-2328 (10 pages)
발행정보
대한기계학회
파일정보
정기간행물|ENG|
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기타
이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

Ultra-high-strength steels are widely used in automotive industry for lightweight and high crash performance. In this study, the effects of process variables such as the clearance and the inclined angle of the die on the sheared edge characteristics of trimmed DP980 have been evaluated in detail. The maximum trimming load decreases with increasing clearance due to a large bending moment leading to a hydrostatic tensile stress in the sheared zone, and tensile typed burr occurs at a trimming clearance above 15.6%t. Also, a negative inclined angle improves the quality of sheared edge and decreases the trimming load. As a result of the trimming experiment, the burr height gradually increases with an increase in the number of strokes due to tool failure resulted from high contact pressure. Furthermore, the burr height significantly decreases as the localization zone is connected linearly from punch to die edge with the negative inclined angle.