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Purpose: Authors have suggested employment of dilatant fluid for metal forming tools, and report an application on v-bending of thin stainless steel strips in this paper. Design/methodology/approach: An alumina concentrated hard-sphere suspension is employed as dilatant fluid for forming. The authors evaluate the suspension with backward extrusion test. Then, the authors try to bend SUS304 stainless strip with 0.25 mm thickness and 30 mm width on the pad of the suspension with a v-bend punch. Findings: Behaviour of the suspension is revealed in backward extrusion test. Migration of water takes important role in it. In v-bending test, including acute angle bending, the authors bend the strip with only the v-bend punch and the alumina concentrated hard-sphere suspension pad successfully. It is thought that forming load is less than with general polyurethane tools. Research limitations/implications: Spring-back in partial bending, which is similar to the suggested process, is larger than in bottoming and coining with dies and bending with polyurethane tools. Therefore, the authors are going to evaluate the spring-back in the suggested process in further study. Practical implications: Polyurethane pad is used in bending process generally because of advantageous points in easy-design, and safe from scratch. However it has disadvantageous points in its limited life and necessity of large forming load. The alumina concentrated hard-sphere suspension can be employed for such the pad with unlimited life. In addition, such the dilatant fluid can be applied on other metal forming process as easy tool. Originality/value: Employing dilatant fluid for forming tools is new idea. Authors try v-bending with an alumina concentrated hard-sphere suspension.
Wydawca
Rocznik
Tom
Strony
699--704
Opis fizyczny
Bibliogr. 15 poz., wykr., tab.
Twórcy
autor
autor
autor
- School of Science and Engineering, Kokushikan University, 4-28-1 Setagaya, Setagaya-ku, 154-8515 Tokyo, Japan, tohashi@kokushikan.ac.jp
Bibliografia
- [1] I. Pahole, S. Bonifarti, M. Ficko, B. Vaupotic, S. Kovacic, J. Balic, Bending of sheet metal of complicated shapes (for 90* angle and more) in combined tools, Proceedings of the 11th International Scientific Conference on „Contemporary Achievements in Mechanics, Manufacturing and Material Science” CAM3S'2005, Gliwice-Zakopane, 2005, (CD-ROM).
- [2] D. S. Comsa, G. Cosovici, P. Jurco, D. Banabic, D. Banabic, Simulation of the hydroforming process using a new orthotropic yield criterion, Proceedings of the 10th Jubilee International Science Conference „Achievements in Mechanical and Materials Engineering” AMME'2001, Gliwice-Zakopane, 2001, 79-84.
- [3] J. Kopac, Z. Kampus, Incremental sheet metal forming on CNC milling machine-tool, Proceedings of 13th International Science Conference „Achievements in Mechanical and Materials Engineering” AMME'2005, Gliwice-Wisła, 2005, 335-338.
- [4] A. Petek, K. Kuzman, J. Kopac, Forces and deformations analysis of incremental sheet metal forming, Proceedings of the 13th International Science Conference „Achievements in Mechanical and Materials Engineering” AMME'2005, Gliwice-Wisła, 2005, 793-802.
- [5] T. Ohashi, H. Ito, K. Shinozaki, S. Ito, H. Watari, Analytical and experimental study on lateral extrusion of cross fittings with a lost core, Journal of Achievements in Materials and Manufacturing Engineering 18 (2006) 399-402.
- [6] T. Ohashi, Experimental and Analytical Study on the lateral extrusion with a lost core, Proceedings of 13th International Science Conference „Achivements in Mechanical and Materials Engineering” AMME'2002, Gliwice-Zakopane, 2002, 391-394.
- [7] S. Thiruvarudchelvan, M. J. Tan, Investigations into collar drawing using urethane pads, Journal of Materials Processing Technology 191/1-3 ( 2007) 87-91.
- [8] A. C. Girard, Y. J. Grenier, B. J. Mac Donald, Numerical simulation of axisymmetric tube bulging using a urethane rod, Journal of Materials Processing Technology 172/3 (2006) 346-355.
- [9] K. Sato, Blanking die using urethane-gum, Metal working Technology (‘Press Gijutsu’) 22/9 (1984) 34-38 (in Japanese).
- [10] Y. Kurosaki, I. Fujishiro, A manufacturing process using the impact compression of a viscoplastic pressure medium. Application to the piercing of fine holes, International Journal of Japan Society for Mechanical Engineers 30/262 (1987) 653-660.
- [11] G. Laszlo, Blechumformung mit elastischer Matrize I, Gummi Fasern Kunstst 60/8 (2007) 484-488 (in Germany).
- [12] G. Laszlo, Blechumformung mit elastischer Matrize II, Gummi Fasern Kunstst 60/9 (2007) 560-564 (in Germany).
- [13] K. Sato,T. Asaoka, R. Miya, Study on hole punching with elastic tools, Advanced Technology of Plasticity 3 (1996) 1624-1629.
- [14] F. Takahashi,T. Nishimura, I. Suzuki, A method of blanking from amorphous alloy foils using rubber tool, CIRP Annals 40/1 (1991) 315-318.
- [15] Y. Ohno et. al, Measurement and analysis of rheology data, and new technologies for viscosity control, gijutsu-jyohokyokai, Tokyo, 2005 (in Japanese).
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BWAN-0004-0030