At present, flexible die medium represented by fluid is mainly used in tube hydropiercing, but it is relatively rare in sheet forming field because of the high requirement of sealing. For this reason, magnetorheological fluid, one of the representatives of intelligent materials, is used as a force transfer medium to provide backpressure for the piercing process of sheet for the first time in this paper, so as to reduce the collapse and improve the quality of fracture surface. The results show that with the increase of internal pressure, the collapse of the area near the cutting edge of punch decreases, the length of burnish zone increases, the aperture is closer to the nominal diameter, and the quality of the hole is significantly improved. The theoretical mechanics model of a single straight chain is established through theoretical analysis, and the magnitude and loading mode of the force exerted on the sheet by magnetic medium are deduced. Through the balanced relationship between punching force and backpressure in the deformed area of sheet, the key parameters affecting the collapse of piercing of sheet are obtained, which has important guiding significance for improving the quality of sheet metal piercing products with magnetic medium.
Magnetic medium Aluminum sheet Piercing Collapse
This is a preview of subscription content, log in to check access.
This paper was supported by the Natural Science Foundation of Heilongjiang Province (LH2019E056) and the Fundamental Research Foundation for Universities of Heilongjiang Province (LGYC2018JQ011).
Compliance with ethical standards
This article is completed under the authors’ independent research, and without the phenomenon that quotes largely or plagiarizes other articles and so on. Therefore, the authors will be correspondingly responsible for this study.
Sun ZY, Lang LH (2017) Study on hydroforming process and springback control of large sheet with weak rigidity. Int J Precis Eng Manuf 18(6):903–912CrossRefGoogle Scholar
Lang LH, Zhang QD (2017) Influence law of initial reverse bulging on sheet hydroforming process. Key Eng Mater 746:99–107CrossRefGoogle Scholar
Nikhare C, Weiss M, Hodgson PD (2017) Buckling in low pressure tube hydroforming. J Manuf Process 28:1–10CrossRefGoogle Scholar
Liu W, An LH, Yuan SJ (2017) Enhancement on deformation uniformity of double curvature shell by hydroforming process and curved blank-holder surface. Int J Adv Manuf Technol 92(Suppl 1:1913–1922CrossRefGoogle Scholar
Wang PY, Zhang WZ, Wang ZJ (2016) Effect of viscosity of viscous medium on formability of Al1060-O sheet in viscous pressure forming (VPF): an experimental study. Int J Adv Manuf Technol 87:1–4):1-10Google Scholar
Gao TJ, Zhang WZ, Xu ML (2017) Finite element analysis and experiment on viscous warm pressure bulging of AZ31B magnesium alloy. J Wuhan Univ Technol Mater Sci Ed 32(3):640–644CrossRefGoogle Scholar
Dong GJ, Zhao CC (2014) Process of back pressure deep drawing with solid granule medium on sheet metal. J Cent South Univ 21(7):2617–2626CrossRefGoogle Scholar
Bi J, Zhao CC, Du B (2018) Formability and strengthening mechanism of AA6061 tubular components under solid granule medium internal high pressure forming. Trans Nonferrous Metals Soc China 28(2):226–234CrossRefGoogle Scholar
Wang PY, Xiang N, Wang ZJ, Li ZX (2018) The rapid response of forming medium’s properties to variable loading types of magnetic field and consequent field-dependent sheet formability. J Manuf Process 31:468–479CrossRefGoogle Scholar
Ma JJ, Zhang DH, Wu BH (2017) Stability improvement and vibration suppression of the thin-walled workpiece in milling process via magnetorheological fluid flexible fixture. Int J Adv Manuf Technol 88(5-8):1231–1242CrossRefGoogle Scholar
Merklein M, Rösel S (2010) Characterization of a magnetorheological fluid with respect to its suitability for hydroforming. Int J Mater Form 3(1):283–286CrossRefGoogle Scholar
Choi SK, Kim WT, Moon YH (2004) Analysis of deformation surrounding a hole produced by tube hydro-piercing. Proc. Instn Mech. Engrs Vol. 218 Part B: J. Eng Manuf 218(9):1091–1097CrossRefGoogle Scholar
Hassannejadasl A, Green DE, Altenhof WJ, Maris C, Mason M (2013) Numerical modeling of multi-stage tube hydropiercing. Mater Des 46:235–246CrossRefGoogle Scholar
Liu G, Lin JF, Wang G, Su HB, Chen XP, Jiang HM (2011) Influence of tube properties on quality of hydropiercing. Trans Nonferrous Metals Soc China 21:456–460CrossRefGoogle Scholar
Sun J, Zhou SN, Yang XL, Xing YJ, Liu X (2016) Polyurethane-rubber punching process for micro-hole arrays. Microsyst Technol 23(7):1–8Google Scholar
Yang T, Hao J, Liu G (2014) Influence of punch shape on the fracture surface quality of hydropiercing holes. J Harb Instit Technol 21(3):85–90Google Scholar
Liu W, Hao J, Liu G, Gao GL, Yuan SJ (2016) Influence of punch shape on geometrical profile and quality of hole piercing-flanging under high pressure. Int J Adv Manuf Technol 86(5-8):1253–1262CrossRefGoogle Scholar
Liu XH, Chen QQ, Liu H, Wang ZB, Zhao HD (2016) Squeeze-strengthening effect of silicone oil-based magnetorheological fluid. J Wuhan Univ Technol-Mat Sci Edit 31:523–527CrossRefGoogle Scholar
Vicente JD, Ruizlópez JA, Andabloreyes E, Segoviagutiérrez JP, Hidalgoalvarez R (2011) Squeeze flow magnetorheology. J Rheol 55(4):753–779CrossRefGoogle Scholar
Zhang XZ, Gong XL, Zhang PQ (2004) Study on the mechanism of the squeeze-strengthen effect in magnetorheological fluids. J Appl Phys 96(4):2359–2364CrossRefGoogle Scholar
Sarkar C, Hirani H (2013) Theoretical and experimental studies on a magnetorheological brake operating under compression plus shear mode. Smart Mater Struct 22(11):5032CrossRefGoogle Scholar
Wang HY, Zheng HQ (2011) Shear and squeeze rheometry of magnetorheological fluids. Adv Mater Res 305:344–347CrossRefGoogle Scholar