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김병규(B. G. Kim),정지용(J. Y. Jeong),김동진(D.-J. Kim),김교성(G.-S. Kim),금영탁(Y. T. Keum) 한국소성가공학회 2009 한국소성가공학회 학술대회 논문집 Vol.2009 No.10
In this study, the guideline for designing the drawbeads used in the stamping dies for advanced high strength steel (AHSS) sheets is investigated. In the drawbead drawing test, the drawbead forces for verifying the equivalent drawbead model(EDM) and the sheet strains for finding marginal strains from FLC0 are measured. In the finite element analysis (FEA), the bending allowance, R/t, is obtained. Based on the forming and bending allowances obtained, the design guideline of the drawbead for determining height and width, which depends on the restraining force and the forming allowance, is prepared by using EDM.