Simulation of Hot Stamping Process With Advanced Material Modeling

Wu, Jin; Zhang, L.; Chen, J.; Wang, W.

doi:10.4271/2004-01-0168

Cited by 4 publications

(3 citation statements)

References 5 publications

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“…In their presented article, the emissivity was assumed as 0.7 and h conv was estimated to be about 45 W/m 2 K. In this study, when e is 0.6, the temperature in the simulation results agreed well with the experimental results. And h rad can be calculated by using equation (1). Therefore, the relation, h 1 = h conv + h rad , ' 90 W/m 2 K and was given by h rad ' 82 W/ m 2 K. In the transfer process, when the input h 1 was 90 W/m 2 K, the temperature in the numerical simulation was in good agreement with the experimental data.…”

Section: Interfacial Heat Transfer Coefficient (Ihtc)mentioning

confidence: 62%

“…The low springback attributed to in-die cooling gives boron steel an unparalleled edge in dimension control and subsequent assembly process. 1 Boron steel is currently the standard high-strength steel, and is used widely in the automotive industry for manufacturing hot-formed parts. The use of hot forming boron steels significantly increases the passenger safety, and reduces the vehicle weight and its fuel consumption.…”

Section: Introductionmentioning

confidence: 99%

“…Appendix Notation B f blank holding force C L clearance between die and punch d 1 lower die hole size d 2 punch size D …”

mentioning

confidence: 99%

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The effect of the blank holding force on formability in hot deep drawing of boron steel considering heat transfer phenomena and friction coefficient by simulation and experimental investigation

Ouyang

Lee

Moon

et al. 2012

Proceedings of the Institution of Mechanical Engineers, Part B:

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The blank temperature and blank holding force (B f ) are important parameters affecting the formability in the hot deep drawing process. Also, the interfacial heat transfer coefficient has a great influence on the temperature distribution in the drawing process. This study examined the effect of the blank holding force (B f ) on the formability of boron sheets. The evaluation was carried out by considering the interfacial heat transfer coefficient and friction coefficient (m) between blank and punch. A J-stamp relative computer simulation was employed to model the experimental process and examine the interfacial heat transfer coefficient and m values. Moreover, experiments by applying different B f were carried out to verify the simulation result. By matching the simulation data with experimental results, the appropriate friction coefficient according to B f for hot deep drawing was evaluated. The results showed that the m values between blank and punch decreased with increasing B f . Based on the evaluated values of interfacial heat transfer coefficient and m, the forming depth, maximum punch load, thickness, thinning rate and equivalent strain according to B f were examined, respectively. The result shows that a larger B f has a more significant effect on the variation of the thickness, thinning rate and equivalent strain of the samples during the drawing process. Furthermore, the thinning rate and equivalent strain variations for samples in fracture and without fracture state were also examined, respectively. The thinning rate did not show a larger difference according to B f . However, the equivalent strain, both in fracture and without fracture state, decreased sharply when increasing the B f .

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Section: Interfacial Heat Transfer Coefficient (Ihtc)mentioning

confidence: 62%

Section: Introductionmentioning

confidence: 99%