A Study on the Method for Punching Small Holes with Cold Stamping Dies

Abstract:

this paper first determines the deformation modes of punching small-hole punches by analyzing the forms of the stress applied to die working parts. It analyzes the disadvantages of existing methods for preventing the buckling problem in punching small holes such as protective jackets and proposes a method for preventing the buckling of punches by reducing the punching force so as to make it possible to punch smaller holes.

• Periodical: Applied Mechanics and Materials (Volume 456)
• Pages: 358-362
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.456.358
• Online since: October 2013
• Authors: Jian Hua Ning, Zheng Ping Hai
• Keywords: Buckling, Process for Second Punching, Punching Small Holes

References

[1] Qixiang Xue, Difficulties and Tricks in the Design and Manufacture of Punching Dies [M]. Beijing: China Machine Press, 2006, pages 16-20.

[2] ZX Jia, HL Li, XC Zhang, HB Wu, MC Fang , Study on the correlated design method of plate holes for progressive dies based on functional feature, The International Journal of Advanced Manufacturing Technology July 2010, Volume 49, Issue 1-4, pp.1-12.

DOI: 10.1007/s00170-009-2371-6

[3] C. Husson, J.P.M. Correia,L. Daridon,S. Ahzi, Finite elements simulations of thin copper sheets blanking: Study of blanking parameters on sheared edgequality, Journal of Materials Processing Technology, Volume 199, Issues 1–3, 1 April 2008, Pages 74–83.

DOI: 10.1016/j.jmatprotec.2007.08.034

[4] C. H. Cao,L. Hua,S. L. Liu, Flange forming with combined blanking and extrusionprocess on sheet metals by FEM and experiments, The International Journal ofAdvanced Manufacturing Technology, November 2009, Volume 45, Issue 3-4, pp.234-244.

DOI: 10.1007/s00170-009-1965-3

[5] Hyunwoo So, Dennis Faßmann, Hartmut Hoffmann, Roland Golle, Mirko Schaper, An investigation of the blanking process of the quenchable boron alloyed steel 22MnB5, before and after hot stamping process, Journal of Materials Processing Technology, Volume 212, Issue 2, February 2012, Pages 437–449.

DOI: 10.1016/j.jmatprotec.2011.10.006

[6] B. Verlinden J.R. Duflou,P. Collin,D. Cattrysse, Cost estimation for sheet metal parts using multiple regression and artificial neural networks: A case study, International Journal of Production Economics, Volume 111, Issue 2, February 2008, Pages 484–492.

DOI: 10.1016/j.ijpe.2007.02.004

[7] Shoichiro Yoshihara, Ken-ichi Manabe, Hisashi Nishimura, Effect of blank holder force control in deep-drawing process of magnesium alloy sheet, Journal of Materials Processing Technology Volume 170, Issue 3, 30 December 2005, Pages 579–585.

DOI: 10.1016/j.jmatprotec.2005.06.028