Study on Spring-Back Effect with Various Temperature of Magnesium Alloy in Roll Forming Process

Kim, Dong Hong; Yoon, Dae Hwan; Yu, Haojie; Jung, Dong Won

doi:10.4028/www.scientific.net/amr.1016.75

Cited by 4 publications

(3 citation statements)

References 3 publications

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“…As any kind of heat integration into forming processes constitutes a cost issue, on the other hand a tendency can be observed to investigate formability in general and roll formability in particular even of materials that exhibit limited formability and high springback at room temperature. Recent experimental research and FEA studies on high-strength titanium alloys such as Ti-6Al-4V by Badr et al [16] and magnesium wrought alloys by Juchmann et al [17], Groche et al [18], Kim et al [19], Watari et al [20] and Hanm and Lee [21] clearly show both the limitations of poor formability and the impact of springback on the shape accuracy. An exploitation of the benefits a roll forming at elevated temperatures has to offer thus seems promising.…”

Section: Temperature-assisted Roll Formingmentioning

confidence: 99%

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Manufacturing of Long Products Made of Innovative Lightweight Materials

Richter

Müller

Kunke

et al. 2015

Acta Metall. Sin. (Engl. Lett.)

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The processing of innovative lightweight materials to sheet metal components and assemblies with globally or locally defined properties is the object of this work. It takes a load-dependent design of components and assemblies, for example, based on the composition of different construction materials or a targeted setting of component areas with specified characteristics to fully exploit the lightweight potential when substituting conventionally used materials. Different process chains for the manufacturing of roll-formed long products made of magnesium alloys and high-strength steels with locally defined properties will be presented in this paper. Depending on the kind of material to be formed and the desired product characteristics, different temperature managements are needed for capable processes. Due to limited formability at room temperature, magnesium alloys require a heating of the forming zones above 200-225°C throughout the bending process in order to activate additional gliding planes and to avoid any failures in the radii. The realization of local hardening effects requires at least one process-integrated heat treatment when roll forming manganese-boron steels. For both processes, it is imperative to realize a heating and cooling down or quenching appropriate for the manufacturing of long products with the required quality. Additionally, proper line speeds that allow a continuously operated economical production have to be considered. Research results including design, FEA, realization and experimentation of the mentioned process chains and strategies will be described in detail.

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Section: Temperature-assisted Roll Formingmentioning

confidence: 99%

“…Experimentation to make long products of magnesium wrought alloys at elevated temperatures as described by Richter et al [25] is a rather new application. Before that, focus was set on preliminary tests and FEA studies at room temperature [17][18][19][20][21].…”

Section: Tempered Roll Forming Of Magnesium Wrought Alloysmentioning

confidence: 99%

Manufacturing of Long Products Made of Innovative Lightweight Materials

Richter

Müller

Kunke

et al. 2015

Acta Metall. Sin. (Engl. Lett.)

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“…Kim el al. [5] with reference, Fig. 4 shows how the definition of the spring-back angle is derived, and Fig.…”

Section: The Bending Process Analysis For the Roll Forming Processmentioning

confidence: 99%

Study on the Spring-Back Effect with Stress Distribution According to Forming Sheet Width in the Roll Forming Process

Kim

Jung

2015

AMM

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This study, based on finite element analysis, analyzed the spring back phenomenon and stress distribution of forming sheets (HTS) in the roll forming process. By comparison of the stress distribution, this study analyzed two kinds of simulation. The first simulation performed simple bending simulation before roll forming simulation. With reference to the first simulation results, the second simulation analyzed the relationship between the stress distribution and the phenomenon of spring back. We also studied the stress distribution effect for spring back in the forming sheet.

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