Application of a feasible formability diagram for the effective design in stamping processes of automotive panels

Ko, Dae-Cheol; Cha, Seung-Hoon; Lee, Sang-Kon; Lee, Chan-Joo; Kim, Byung-Min

doi:10.1016/j.matdes.2009.09.022

Cited by 24 publications

(10 citation statements)

References 14 publications

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“…Orthogonal experiment is a design method to study multiple factors level which is often used for the performance prediction of stamping forming of automotive panels [13][14][15][16]. During the process of automotive lower floor board stamping, the main process parameters affecting the forming performance include BHF, die corner radius, die clearance, and friction coefficient.…”

Section: Orthogonal Experiments Designmentioning

confidence: 99%

Optimization of Process Parameters of Stamping Forming of the Automotive Lower Floor Board

Huang

2014

Journal of Applied Mathematics

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There are many process parameters which have great effect on the forming quality of parts during automobile panel stamping forming process. This paper took automotive lower floor board as the research object; the forming process was analyzed by finite element simulation using Dynaform. The influences of four main process parameters including BHF (blank holder force), die corner radius, friction coefficient, and die clearance on the maximum thinning rate and the maximum thickening rate were researched based on orthogonal experiment. The results show that the influences of each value of various factors on the target are not identical. On this basis, the optimization of the four parameters was carried out, and the high quality product was obtained and the maximum thinning rate and maximum thickening rate were effectively controlled. The results also show that the simulation analysis provides the basis for the optimization of the forming process parameters, and it can greatly shorten the die manufacturing cycles, reduce the production costs, and improve the production efficiency.

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Section: Orthogonal Experiments Designmentioning

confidence: 99%

Optimization of Process Parameters of Stamping Forming of the Automotive Lower Floor Board

Huang

2014

Journal of Applied Mathematics

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“…More recently, several researchers [19,[65][66][67] have investigated the forming limit diagrams through finite element codes. In this chapter, Autoform Master 4.4 was employed for FE analysis of forming limit diagrams.…”

Section: Numerical Approachmentioning

confidence: 99%

Formability Characterization of Titanium Alloy Sheets

Djavanroodi¹,

Janbakhsh²

2013

Titanium Alloys - Advances in Properties Control

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“…The objective function for fracture and wrinkling under the given combinations of the shape parameters is defined by analyzing the strain in the deformed component on the basis of the forming limited diagram (FLD) (Ko et al, 2010). However, applying FLD at the elevated temperatures used in hot stamping is difficult.…”

Section: Determination Of Channel Shape By Fe-analysismentioning

confidence: 99%

Development of hot stamped center pillar using form die with channel type indirect blank holder

Choi

Kim

Nam

et al. 2011

Int.J Automot. Technol.

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The hot stamping process has been used in the automotive industry to reduce the weight of the body-in-white and to increase passenger safety via improved crashworthiness. However, defects such as fracture and wrinkle occur when hot stamping is performed using a conventional drawing or forming method. In this study, a channel-type indirect blank holder (CIBH) is proposed to develop a high-strength center pillar in form-type hot stamping, so that the aforementioned drawbacks are overcome. This type of blank holder plays an important role in reducing severe wrinkling at the flange; such wrinkling leads to folding after the completion of form-type hot-stamping. First, we investigated the effect of the channel shape on the indirect blank holding force by using a simplified two-dimensional plane-strain stamping process. Second, we selected the slope angle and corner radius of the channel as the main shape parameters by finite element analysis and artificial neural network (ANN). It is known that fracture at the hot formed wall and wrinkle at the flange are significantly affected by the slope angle of the channel, and the appropriate value for eliminating fracture and wrinkle is determined to be 99°. By performing hot stamping using a form die with the selected channel, we can manufacture a high-strength center pillar without wrinkle and fracture.

show abstract

Application of a feasible formability diagram for the effective design in stamping processes of automotive panels

Cited by 24 publications

References 14 publications

Optimization of Process Parameters of Stamping Forming of the Automotive Lower Floor Board

Optimization of Process Parameters of Stamping Forming of the Automotive Lower Floor Board

Formability Characterization of Titanium Alloy Sheets

Development of hot stamped center pillar using form die with channel type indirect blank holder

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