Abstract
To avoid out of round during hydro-forming of the orange shell with small polar plates, a new preform shell with basketball type has been designed before hydro-forming. The theory for trending spherical shell from single-curvature preform shell was analyzed. The results demonstrated that the performance difference between original sheet and weld seam does affect the deformation behavior. The roundness was analyzed by numerical simulation for hydro-forming of the basketball and orange spherical shells; and the influence of preform type was discussed on out-of-roundness. It is shown that 0.65% out-of-roundness on the 90° cross section of orange preform shell still existed when the internal pressure made the basketball preform shell to a sound circle on each section. Furthermore, an experiment was conducted on hydro-forming of basketball and orange shells with diameter 160 mm. The deformation of the shell shapes, variations of the diameters, volume change, and thickness distributions were measured in the experiment. The basketball shell has more accurate shape and uniform thickness than orange shell under the same internal pressure. It is proven that hydro-forming of the basketball preform shell is reasonable and this new type is suitable for manufacturing of the spherical shell.
Similar content being viewed by others
References
Zhang WW, Yuan SJ (2016) Research on hydro-forming of combined prolate ellipsoidal shell with double generating lines. Int J Adv Manuf Technol 82:595–603
Zhang WW, Yuan SJ. (2017) Reverse geometric modeling for pre-form shape of prolate ellipsoid before hydro-forming. Int J Adv Manuf Technol 88:1903–1909
Wang J, Ma N, Murakawa H, Teng BG, Yuan SJ (2011) Prediction and measurement of welding distortion of a spherical structure assembled from multi thin plates. Mater Des 32:4728–4737
Filho RAC, Silva HC, Marcondes PVP (2010) Experimental and numerical true strain assessment on sheet forming for different tool design. Int J Adv Manuf Technol 48:473–479
Wang ZR, Wang T, Kang DC, Zhang SH, Yi F (1989) The technology of the hydro-bulging of whole spherical vessels and experimental analysis. J Mech Work Technol 18:85–94
Tantichattanont P, Adluri SMR, Seshadri R (2007) Fitness-for-service assessment of spherical pressure vessels with hot spots. International Journal of Pressure Vessels & Piping 84:762–772
Yuan SJ, Zhang WW, Teng BG (2015) Research on hydro-forming of combined ellipsoidal shells with two axis length ratios. J Mater Process Technol 219:124–132
Zeng YS, Wang ZR, Yuan SJ (1997) The numerical simulation of the integral hydrobulging of ellipsoidal shells. J Mater Process Technol 72:358–362
Hu WL, Wang ZR (2004) Deformation analyses of the integrated hydro-bulge forming of a spheroidal vessel from different preform types. J Mater Process Technol 151:275–283
Zhang WW, Yuan SJ (2015) Pre-form design for hydro-forming process of combined ellipsoidal shells by response surface methodology. Int J Adv Manuf Technol 81:1–10
Zhang Q, Wang ZR (2015) Shape improvement of a dieless hydro-bulged sphere made of hexagonal and pentagonal shaped panels. J Mater Process Technol 220:87–95
Wang ZR, Yuan SJ (2006) New forming technologies used in manufacturing large vessels. International Journal of Machine Tools & Manufacture 46:1180–1187
Author information
Authors and Affiliations
Corresponding authors
Rights and permissions
About this article
Cite this article
Zhang, R., Zhang, W. & Yuan, S. Research on hydro-forming of spherical shells with different preform types. Int J Adv Manuf Technol 92, 2631–2638 (2017). https://doi.org/10.1007/s00170-017-0350-x
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00170-017-0350-x