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Tailored Blank를 이용한 Side Panel 개발
권재욱(J.W.Kwon),명노훈(N.H.Myoung),백승엽(S.Y.Baek),인정제(J.J.Yin),이경돈(K.D.Lee),유순영(S.Y.You),이영국(Y.K.Lee) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.11_2
In this study. the side panels were developed using the laser-welded Tailored Blanks (TB) with both the same thickness and the different thickness. At first. the formability of the same thickness T.B was investigated to be compared with one of the non welded panel with respect to weldline movements and strain distribution on blank during the stamping. Based on these results. we selected candidates of TB with different thickness for stamping experiments. That is. we determined the weld line positions and the die step.<br/> Then we made some stamping tryouts with selected types of blank designs to investigate the formability of TB with different thickness. During the tryouts. the wrinkles were found in the a-pillar lower region which is under the deformation mode .of the shrink flange. In the b-pillar region. the fractures were found also. these defects have been reduced and corrected by controlling the blank design and the die faces and process pamameters.
성형해석을 이용한 테일러드 블랭크 사이드 아우터 패널의 블랭크 및 금형 설계
인정제(J.J.Yin),안덕찬(D.C.Ahn),최익현(I.H.Choi),이경돈(K.D.Lee),유순영(S.Y.You),이영국(Y.K.Lee) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.11_2
The successful forming of tailor welded side panel requires appropriate blank design, weld line position and draw die design, etc.. In this study, the blank design of tailor welded side panels with different thicknesses was suggested through forming simulation results on the stretch flange model. Then the full model simulation was performed with the proposed designs of tailor welded side outer blank. From the full model simulation results, failure, wrinkles, and weld line movements were checked. According to the moving pattern of weldlines, the proper step position in the draw die was determined. The suggested blank and draw die design were applied to the real panel forming.