Electromagnetic Bulging of Stainless Steel Sheet by Using Flat One-Turn Coil

Abstract:

In this paper, we describe an electromagnetic bulging for a SUS304-O stainless steel sheet (0.15 mm thick) and its experimental results. In the die forming, the flat one-turn coil is adopted for the bulging of the SUS304-O sheet, when an aluminum sheet (0.3 mm thick) as a driving plate (driver) is used together. When an impulse current from an energy-storing capacitor bank passes through the flat one-turn coil, a high-density magnetic flux is suddenly generated around the coil. Eddy currents are induced in the driver placed on the coil. The SUS304-O sheet is pressed by an electromagnetic force generated in the driver, leading to bulge into a meandering groove with small concave shape. The bank energy required for the bulging of 12mm wide, 60mm long and 0.43mm high is about 4.5 kJ, and the obtained workpiece does not almost have wrinkles and curves.

• Periodical: Materials Science Forum (Volume 673)
• Pages: 101-106
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.673.101
• Online since: January 2011
• Authors: Masaki Ishibashi, Keigo Okagawa, Tomokatsu Aizawa
• Keywords: Aluminum Sheet, Bulging, Electromagnetic Force, Electromagnetic Forming, Flat One-Turn Coil, High Energy Rate Forming, Sheet Metal Forming, Stainless Steel Sheet

References

[1] K. Okagawa, K. Matsuzawa, T. Aizawa and Y. Matoba: Proc. of the Japanese Spring Conference for the Tech. of Plasticity, 187-188. (2006).

[2] T. Aizawa, K. Okagawa, H. Miyazaki, T. Shimojou and H. Inako: Proc. of the Japanese Spring Conference for the Tech. of Plasticity 191-192. (2006).

[3] D.A. Oliveira, M.J. Worswick, M. Finn and D. Newman: Materials Processing Technology, 170, 350-362. (2005).