Experimental Studies on Flexible Forming of Sheet Metals Assisted by Magnetic Force Transfer Medium

Li, Feng; Zhou, Fa; Wang, Mo Nan; Xu, Ping; Jin, Chuangui

doi:10.1007/s11837-016-1968-0

Cited by 11 publications

(1 citation statement)

References 12 publications

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“…Some researchers investigated the effects of B on the formability of sheet metal through bulge tests and found that formability and stress state of sheet metal could be signi cantly improved by controlling the ux density of external magnetic eld [11][12][13][14]. Li et al [15,16] further used MRF as the back pressure-carrying medium in deep drawing of stainless steel sheet.…”

Section: Introductionmentioning

confidence: 99%

Real-time and selective control of shell deformation based on dynamic and subregional pressure response of flexible dies under magnetic field

Xiang,

Wang,

Wang

et al. 2024

Int J Adv Manuf Technol

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Pressure-carrying properties of traditional exible materials can hardly be controlled during the process that they serve as pressure-carrying medium to form shell components. In this work, a forming method based on the subregional and dynamic pressure response of property-adjustable forming medium was proposed, aiming at achieving the exible control of shell deformation in different regions and stages.Elastic composites with iron particles selectively dispersed in pre-designed location, i.e., heterogeneous magneto-rheological elastomers (MREs), were fabricated and employed as the exible dies in the bulge tests of Al1060 sheet in the presence of external magnetic eld. Deformation behaviors of sheet metal were dynamically measured, and loading and stress conditions were numerically studied. The results showed that local shell deformation could be controlled in a nearly monotonic way by adjusting the distribution pattern and content (φ) of iron particles. In the case that heterogeneous MRE with φ = 0/30% was employed and magnetic eld with ux density (B) of 1950 Gs was applied, difference of bulge height and strain on both sides of the deformed shell increased by 6.5% and 16%, respectively. In the presence of magnetic eld with B = 1240Gs, difference of bulge height on both sides of the sheet metal increased by 9% compared with the condition that no magnetic eld is applied. But, the in uence of magnetic eld is not monotonous. Changed stress paths of sheet metal, which was induced by non-uniformly distributed and dynamically controllable pressure eld of heterogeneous MREs, was used to clarify the forming mechanism.

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