• Title, Summary, Keyword: Tailor Welded Blanks

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A Study on the Design of Front Side Member for Applied Tailor Welded Blanks (Tailor Welded Blanks 적용을 위한 Front Side Member의 설계기법 연구)

  • 강대철;전병희;전한수
    • Transactions of the Korean Society of Machine Tool Engineers
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    • v.10 no.1
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    • pp.51-58
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    • 2001
  • The use of tailor welded blanks (TWB) in automotive applications is increasing due to the potential of weight and cost saving. The object of this study is development of the front side member by static analysis and crash simulations. Accord-ing to the results , energy absorption and barrier force is very important parameter to control passenger safety and deforma-tion shape. A energy absorbability point of view, tailor welded blanks is most effective to absorb energy than non-twb. Non-TWB front side member and TWB applied front side member were simulated. It shows reduce stmping parts weight reduction and cost down.

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Development of Automotive Part using Tailor Welded Blanks (Tailor Welded Blanks를 이용한 자동차용 부품개발)

  • 이승희;전병희;김헌영
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • pp.40-44
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    • 1998
  • In this study, the subframe of passenger car is developed by typical analysis and carsh simulations. According this results, energy absorption and barrier froce is very important to control passenger safety and deformation shape. For that purpose, it is most effective to absorb energy more tailor welded blanks(TWB) subframe than non-TWB. The subframe with TWB is simulated, in which reduced stamping parts, weight reduction and cost down.

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A Study on the Design Method of Passenger Car Type Front Side Member Using Tailor Welded Blanks (Tailor Welded Blanks를 이용한 승용차용 Front Side Member 설계기법 연구)

  • 이승희
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
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    • pp.403-408
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    • 2000
  • The use of tailor welded blanks(TWB) in automotive applications is increasing due to the potential of weight and cost saving In this study, the front side member of passenger car is developed by typical analysis and crash simulations. According this results, energy absorption and barrier force is very important to control passenger safety and deformation shape. For that purpose, it is most effective to absorb energy more tailor welded blanks front side member than non-twb. The front side member with twb is simulated, in which reduced stamping parts, weight reduction and cost down.

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Structural Design of Door Assembly to Apply Tailor Welded Blanks Technique (합체박판 성형기법의 적용을 위한 자동차 도어의 구조 설계)

  • 황우석;이덕영;하명수
    • Transactions of the Korean Society of Automotive Engineers
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    • v.10 no.2
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    • pp.228-233
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    • 2002
  • TWB(Tailor Welded Blanks) is one of the recent techniques to reduce the weight and cost of the body members. To apply the TWB technique, we must decide the position of the welding line and the thickness of the welded blanks. Although many researchers have tried to check the formability of welded blanks, there are not so many researches from the structural point of view. In this paper, the TWB technique is applied to combine the door inner panel and the hinge face panel into one piece. The finite element structural analysis of the door assembly leads to the final design of the tailor welded door inner panel, which shows the mass reduction of 1.08kg without the sacrifice of the structural stiffness. The structural stiffness analysis includes the frame stiffness analysis, the belt line stiffness analysis, the door sagging analysis and the vibration analysis.

Application of the Backward Tracing Scheme of Finite Element Method to Tailored Blank Design and Welding Line Movement in Sheet Metal Forming (두께가 다른 두 용접판재 성형에 있어서 블랭크 설계 및 용접선 이동에 대한 유한요소법의 역추적기법 적용)

  • 구태완;최한호;강범수
    • Transactions of Materials Processing
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    • v.9 no.5
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    • pp.453-462
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    • 2000
  • Tailor-welded blanks are used for forming of automobile structural skin components. The main objective of this study is to achieve weight and cost reduction in manufacturing of components. For successful application of tailor-welded blanks, design of initial welded blanks and prediction of the welding line movement are critical. The utilization of the backward tracing scheme of the finite element method shows to be desirable in design of initial welded blanks for net-shape production and in prediction of the welding line movement. First the design of the initial blank in forming of welded thick sheet with isotropy is tried, and it appears successful in obtaining a net-shape stamping product. Based on the first trial approach, the backward tracing scheme is applied to anisotropic tailored blanks. The welding line movement is also discussed.

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Forming Limits for the Welded Sheets (용접판재의 성형한계에 관한 실험적 연구)

  • 허영무;김형목;서대교
    • Transactions of Materials Processing
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    • v.8 no.5
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    • pp.429-436
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    • 1999
  • In sheet metal forming , forming limit diagram is very important to design and analyze of sheet metal forming process. Recently tailor welded blanks of different thickness and different material and strength combinations are used widely in automobile industry to reduce car manufacturing cost. In order to analyze the forming characteristics of tailored welded blanks, we have investigated the forming limit dia-grams for 3 kinds of different material using mash seam and laser welding experimentally and dis-cussed for the characteristics of forming for tailor welded blanks. It is concluded that forming limit dia-gram for the different material combination TWB locates between FLD of the thinner base material sheet and the thicker ones.

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A Study on the Development of Sub-frame Designe Using Tailor Welded Blanks (Tailor Welded Blanks를 이용한 승용차용 Sub-frame의 설계기법 연구)

  • Jeon, Byung-Hee
    • Journal of the Korean Society of Safety
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    • v.15 no.2
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    • pp.22-30
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    • 2000
  • The sub-frame of passenger car begins to be used widely for the safety of passengers. Conventional design of the sub-frame comprises 22parts, and it requires quite complicated production processes. In this papers, the sub-frame is designed with TWB(Tailor Welded Blanks) to improve stiffness, to reduce weight and to simplify the manufacturing process. To design the proper structure, structural analysis and crash analysis are executed about the conventional design and TWB applied design. A prototype TWB applied sub-frame is manufactured using mash-seam welded TB(Tailored Blanks). Comparing with the conventional sub-frame, the TWB applied sub-frame has 30% weight reduction and 17% increasement of structural stiffness in average.

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Formability Study on Weld Line Location and Movement of Laser-Tailor Welded Blanks

  • Hong, Joo-Pyo;Kim, Heon-Young;Oh, Soo-Ik
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • pp.19-24
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    • 1997
  • The weld line location and the weld line movement in stamping with laser-tailor welded blanks(TWB) were investigated through square cup deep drawing tests. The step blank holder was introduced to form TWB of different thicknesses without wrinkling, and the non-uniform blank holding force(BHF) was enforced to control weld line movement. Test results of the blanks with shifted weld lines showed that the large portion of the thinner area could result in a large weld line movement. Careful selection of the weld line location and the BHF control should be adapted in TWB design to avoid failures and to ensure its formability.

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Study on the Forming of Tailor Welded T-Section (레이저 용접 판재의 T형 단면에의 적용 및 성형성 연구)

  • 김헌영
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • pp.159-162
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    • 2000
  • Wrinkles and shape distortions are generated during the forming of B-pillar(or center pillar) which is a component of the automobile side-frame. The stretch flanging modes at the joining part of the B-pillar and the roof-rail or the side-still give rise to forming problems when taior-welded blanks are applied to the side-frames. The authors simplified B-pillar lower part to T shaped section to investigate the forming behaviors. Three of die step locations and two of blank types were tested to show the effects of weld line locations and edge conditions on he forming of tailor welded blanks. The heights of body wrinkles and the strain distribution in the stretch flanged area were measured and compared.

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Effects of Drawbead Dimensions to the Weld-Line Movements for the Deep Drawing of Tailor-Welded Blanks (용접 판재 성형 가공시의 용접선 이동에 미치는 드로비드 치수 영향에 관한 연구)

  • Heo, Young-Moo;Chang, Sung-Ho;Kim, Heon-Young;Seo, Dae-Gyo
    • Proceedings of the KSME Conference
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    • pp.786-791
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    • 2000
  • The purpose of this study is to investigate quantitatively the effects of drawbead dimensions to the weld line movements for the deep drawing of the tailor welded blanks. Square blanks have been used and five different circular drawbeads were installed in experimental apparatus. The differences in the weld-line movements and the tendencies of the strain distributions in thickness were investigated by experimental and analytical methods. The results of the weldline movement show that the smaller the radius of drawbead installed, the larger the values of movements. Also it is shown for thickness strain in central and diagonal direction that the larger the dimension of drawbead, the larger the values of maximum thickness strain. The drawbead adds the additional restraining forces to the blank, hence the movement of weld line could be controlled by the adequate drawbead installation

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