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Investigation of forming accuracy in multipoint forming with composite elastic pads

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Abstract

Defects in the form of dimples, straight edges, and wrinkles can easily appear when a multipoint die is used to directly form sheet metal. The main methods currently used to address this issue are to add polyurethane elastic pads between the punch units and the blank or to use a blank holder device. However, the use of polyurethane elastic pads or a blank holder device may reduce the accuracy of the formed die surface or the material utilization ratio, respectively. To improve the outcome, a composite elastic pad for multipoint forming is proposed. Taking a spherical surface of radius R400 as the target surface, numerical simulations and forming experiments using three different forming conditions, namely, without any cushion, with polyurethane elastic pads, and with composite steel pads, were conducted using the finite element analysis software Abaqus and a YAM-200 multipoint forming press, which was independently developed by the Jilin University. The results show that compared with the forming conditions without any cushion and with polyurethane elastic pads, when the proposed composite steel pads are used in multipoint forming, the forming accuracy is effectively improved, and defects in the form of dimples, straight edges, and wrinkles are effectively suppressed. Further research revealed that varying the thickness of polyurethane sheet A or polyurethane sheet B in the composite elastic pad design will result in different effects on forming accuracy and quality improvement. When the thicknesses of polyurethane board A and polyurethane board B are 5 mm and 10 mm, respectively, the forming effect is the best. Compared with forming without a cushion, the maximum error and average error of the formed parts are reduced by 68.3% and 66.1%, respectively.

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References

  1. Li MZ, Li SH, Li GQ, L Z, Liu YH (1998) The research of numerical simulation on wrinkling in sheet metal multi - point forming process. Aust J Mech Eng 9(10):34–38

    Google Scholar 

  2. Yagami T, Manabe KI, Yang M, Koyama H (2004) Intelligent sheet stamping process using segment blankholder modules. J Mater Process Technol 155–156(1):2099–2105

    Article  Google Scholar 

  3. Yaşar M, Korkmaz Z, Gavas M (2007) Forming sheet metals by means of multi-point deep drawing method. J Mater Des 28(10):2647–2653

    Article  Google Scholar 

  4. Liu ZW, Li MZ, Han QG (2012) Numerical simulation on multi-point sheet metal forming with wrinkle resistance function. Aust J Mech Eng 42(5):1208–1213

    Google Scholar 

  5. Li LC, Li YT, Li MZ (2013) Comparison on flexible blank-drawer and blank-holder forming process for sheet metal. Aust J Mech Eng 49(02):67–72

    Article  Google Scholar 

  6. Fakhri MS, Aziz SJ (2016) Study of the influence of the elastic rubber cushion on product quality formed by a multi - point forming (MPF) process. J Eng Technol 34(3):452–463

    Google Scholar 

  7. Abebe M, Lee K, Kang BS (2016) Surrogate-based multi-point forming process optimization for dimpling and wrinkling reduction. Int J Adv Manuf Technol 85(1-4):391–403

    Article  Google Scholar 

  8. Luo YX, Yang WM, Liu ZF, Wang YQ, Du RX (2016) Numerical simulation and experimental study on cyclic multi-point incremental forming process. Int J Adv Manuf Technol 85(5-8):1249–1259

    Article  Google Scholar 

  9. Liu YJ, Li MZ, Ju FF (2016) Research on the process of flexible blank holder in multi-point forming for spherical surface parts. Int J Adv Manuf Technol 89:1–8

    Article  Google Scholar 

  10. Cai ZY, Li MZ, Song XS (2003) Analysis and control of wrinkling in multi-Point forming of sheet metal without blank holder. J Plast Eng 10(05):14–19

    Google Scholar 

  11. Li SH, Shen HQ, Ni XF, Chen GL (2013) Mechanism of surface low during the stamping process of automobile exterior panels. Aust J Mech Eng 49(6):153–159

    Article  Google Scholar 

  12. Zareh-Desari B, Davoodi B, Vedaei-Sabegh A (2017) Investigation of deep drawing concept of multi-point forming process in terms of prevalent defects. Int J Mater Form 10(2):193–203

    Article  Google Scholar 

  13. Abebe M, Park JW, Kim J, Kang BS (2017) Numerical verification on formability of metallic alloys for skin structure using multi-point die-less forming. Int J Int J Precis Eng Manuf 18(2):263–272

    Article  Google Scholar 

  14. Abosaf M, Essa K, Alghawail A, Tolipov A, Su SZ, Pham D (2017) Optimisation of multi-point forming process parameters. Int J Adv Manuf Technol 92(6):1–11

    Google Scholar 

  15. Qu Eh, Li MZ, Li R (2018) Inhibitory effects of a flexible steel pad on wrinkling in multi-point die forming. Int J Adv Manuf Technol 95(5-8):2413–2420

    Article  Google Scholar 

  16. Xing J, Li MZ, Cheng YY, Wang BL, Yang Z, Wang Y (2016) Effect of the arrangement of the punch units in multi-point stretch forming process. Int J Adv Manuf Technol 86(5-8):1–9

    Article  Google Scholar 

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Authors and Affiliations

  1. College of Materials Science and Engineering, Jilin University, Changchun, 130025, China

    Erhu Qu & Mingzhe Li

  2. Roll Forging Institute, Jilin University, Changchun, 130025, China

    Erhu Qu & Mingzhe Li

  3. Changchun Ruiguang Technology Co. Ltd, Changchun, 130025, China

    Erhu Qu & Rui Li

Authors
  1. Erhu Qu
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  2. Mingzhe Li
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  3. Rui Li
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Correspondence to Mingzhe Li.

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Qu, E., Li, M. & Li, R. Investigation of forming accuracy in multipoint forming with composite elastic pads. Int J Adv Manuf Technol 105, 4401–4413 (2019). https://doi.org/10.1007/s00170-019-04361-2

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  • DOI: https://doi.org/10.1007/s00170-019-04361-2

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