The Influence of Cold Forming Conception on the Springback Magnitude

Abstract:

Cold forming, especially for steels of increased mechanical properties, encounters problem with a springback. Most of the tools require compensation of that effect, however it is not always feasible in a conventional way. In some special cases such as twisting springback, compensation of a tool remains an ineffective method of solving the problem. This paper aims to investigate the behaviour of springback deviation which may be reduced using the change of forming conception such as: crash forming, holding and stamping or stamping with pad. The results lead to an in-depth understanding of the design process and parameters for advanced high strength components. It is immensely important for tool shops which usually have only few weeks to make a tool. The essence of designing and numerical simulations must be emphasized. Without them some problems with twisting springback may be encountered during trial test what would involve labour absorbing corrections and some extra costs. Therefore, it is crucial to pay attention to forming conception, as using it we can obtain entirely different

• Periodical: Key Engineering Materials (Volumes 554-557)
• Pages: 2299-2311
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.554-557.2299
• Online since: June 2013
• Authors: Paweł Bałon, Andrzej Świątoniowski
• Keywords: Compensation, Metal Forming, Simulation Analysis, Springback

References

[1] M. Firata, B. Kaftanoglub, O. Eserc; Sheet metal forming analysis with any emphasis on the sprinback deformation; Journal of materials processing technology; (2008); 135–148

[2] X. Siguang, Z. Kunmin, T. Lanker, J. Zhang, C. T. Wang; Springback prediction compensation and correlation for automotive stamping; (2000)

[3] H. Li, G. S. G. Li Z. Gong, D. Liu, Q. Li; Elsevier; On twist springback in advanced high-strength steels; Materials and Design; 32; (2011)

DOI: 10.1016/j.matdes.2011.02.035

[4] A. Mangas, A. Arroyo, I. Fernandez, B. Gonzalez; Improvement of springback FEM simulation by means of an optimization procedure based on an experimental trial

[5] Materials Property Ultra High Strength Steel Dogal, SSAB Tunnplant AB, Borlange, Sweden

[6] Lundh H., Bustad P. A., Carlsson B., Engberg G., Gustafsson L., Lidgren R., Sheet metal forming, SSab Tunnplant, Goteborg, Sweden, 1998, 2:1, 2:2, 4:3, 4:4, 4:10, 4:17, 5:14

[7] ESI Group PAM-STAMP 2G 2011, User's Guide, 100-102 Avenue de Suffren Paris; France; (2011)

[8] M. Ninshu, U. Yasuyoshi; Springback prediction by Youshida-Uemori model and compensation of tool surface using JStamp; Interlaken; Switzerland, (2008)

[9] A comprehensive Review of Experimental Approaches Used in the Measurement of Springback; A.B. Abdullah; S. M. Sapuan; Z. Samad; N. A. Aziz; Advances in Natural and Applied Sciences, 6(2); (2012); 195-205