Investigation of the effect of blank holder force distribution on deep drawing using developed blank holder divided into double rings

Zhang, Hongsheng; Qin, S.; Cao, Liqin

doi:10.1007/s40430-021-03003-7

Cited by 11 publications

(2 citation statements)

References 19 publications

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“…Zhang [14] designed a magnet holding method combined with the multipoint holding technique. There are many other layouts techniques, such as adopting special structure of elastic blank holders [15][16][17] and multi-point plate forming machine [18].…”

Section: Introductionmentioning

confidence: 99%

Development of forming process for deep drawing of square cup with optimized blank holder pressure

Zhang,

Qin

2024

Int J Adv Manuf Technol

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A novel segmental blank holder technique was developed to apply BHF on sheet metal, in which the binder was divided into double rings to apply blank holding force (BHF) independently and effectively on different flange regions. Firstly, the holding principles were expatiated by theoretical derivation. The results show that the BHF can be applied on different radial areas independently. Then The reasonable of segmental blank holder technique was proven by forming simulation. the distribution of BHF applied by the new blank holder is reasonable than that of single blank holder. Finally, the feasibility of the segmental blank holder technique was proven by a series of experiments. the flange wrinkling was demonstrated to be more eliminated than that using the single blank holder. Also, the result indicates that compared with 1:2 and 2:1, when the distribution ratio between outer ring and the inner ring is 1:2, there have a better forming quality.

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Section: Introductionmentioning

confidence: 99%

Development of forming process for deep drawing of square cup with optimized blank holder pressure

Zhang,

Qin

2024

Int J Adv Manuf Technol

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“…The experimental results showed that the optimized BHF path reduced the wrinkling of formed parts and made the plastic deformation more uniform. Zhang et al 9) proposed a novel double-ring blank holder method to eliminate wrinkling by applying independent BHF on different flange areas. The application of VBHF during deep drawing process has become a consensus, but at present many researches focus on numerical simulation, control algorithms, experimental trial and error.…”

Section: Introductionmentioning

confidence: 99%

Prediction and Experimental Verification of the Critical Fracture Blank Holder Force for Deep Drawing of Box-Shaped Parts

et al. 2022

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In this paper, the deformation law of box-shaped parts drawing was analyzed, and the mathematical expression for calculating the critical fracture blank holder force (BHF) was deduced. In order to determine the fracture parameters of 08Al sheet, notched specimen tensile tests were conducted, the full-field strain of the specimens from deformation to fracture was obtained by the digital image correlation (DIC) technology. The evolution law of the stress triaxiality and Lode parameter with plastic deformation was obtained, and the fracture parameters of the modified Mohr-Coulomb (MMC) fracture criterion were fitted by the least squares method. The finite element (FE) simulation model coupled with MMC ductile fracture criterion was established to simulate the fracture behavior of sheet. The reliability of theoretical calculation was evaluated by FE simulation and experiments under various process conditions. The results demonstrated that the prediction of the critical fracture BHF by theoretical calculation and FE simulation were both partial safety predictions and all fracture earlier than the tests. In the theoretical calculation, when the flange shrinkage rate was 0.19, the critical BHF was the smallest, and the error was 17.5% compared with the tests, the theoretical calculation was closer to the test results. The theoretical calculation and FE simulation coupled with ductile fracture criterion provide a reference value for predicting the critical fracture BHF and intelligent control in actual production.

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Deep Drawing of Sheet Metal

Huda

2024

Mechanical Engineering Series

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Investigation of the effect of blank holder force distribution on deep drawing using developed blank holder divided into double rings

Cited by 11 publications

References 19 publications

Development of forming process for deep drawing of square cup with optimized blank holder pressure

Development of forming process for deep drawing of square cup with optimized blank holder pressure

Prediction and Experimental Verification of the Critical Fracture Blank Holder Force for Deep Drawing of Box-Shaped Parts

Deep Drawing of Sheet Metal

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