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블랭크 홀딩력 조절을 통한 원형컵 딥드로잉 성형성 향상에 관한 수치적 연구
정현기(H. G. Jeong),장은혁(E. H. Jang),정승호(S. H. Jung),이상현(S. H. Lee),정완진(W. J. Chung) 한국소성가공학회 2013 한국소성가공학회 학술대회 논문집 Vol.2013 No.10
In deep drawing of sheet metal, a blank holding force(BHF) is one of the key factor. A low BHF can cause wrinkling, whereas a high BHF can cause fracture during a deep drawing process. Thus, formability can be influenced by application appropriate BHF. In this study, a variable blank holding force (VBHF) is applied to extend the forming limit by avoiding both wrinkling and fracture. To determine VBHF profile in circular cup deep drawing, numerical simulations and statistical analysis are carried out using commercial FEM software. Consequently, it was shown that the formability of the deep drawn circular cup was improved by using the numerical simulation with statistical technique.