Employment of alumina suspension pad for v-bending of SUS304 strip

• Autorzy: Ohashi T. , Chiba H. , Takano H.
• Języki publikacji: PL

Abstrakty

EN

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 evaluated the suspension with backward extrusion test. Followed by SUS304 stainless strip with 0.25mm thickness and 30mm width on the pad of the suspension with a v-bend punch. Findings: Behaviour of the suspension is revealed in the 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 vbend 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 will 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 a pad with unlimited life. In addition, such dilatant fluid can be applied on other metal forming process as easy tool. Originality/value: Employing dilatant fluid for forming tools is new idea. V-bending with an alumina concentrated hard-sphere suspension was attempted.

Słowa kluczowe

PL

obróbka plastyczna; tłoczenie blach; zginane

EN

plastic forming; sheet metal forming; bending; easy tool; dilatant fluid

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2008
• Tom: Vol. 30, nr 1
• Strony: 57--60
• Opis fizyczny: Bibliogr. 15 poz.

Twórcy

autor

Ohashi T.

autor

Chiba H.

autor

Takano H.

• School of Science and Engineering, Kokushikan University, 3-4-1 Setagaya, Setagaya-ku, Tokyo 154-8515, Japan,

Bibliografia

• [1] J. Kopac, Z. Kampus, Incremental sheet metal forming on cnc milling machine-tool, Proceedings of the 13th International Science Conference “Achievements in Mechanical and Materials Engineering” AMME'2005, Gliwice – Wisła, 2005, 335-338.
• [2] 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.
• [3] S. Thiruvarudchelvan, M.J. Tan, Investigations into collar drawing using urethane pads, Journal of Materials Processing Technology 191/1-3 (2007) 87-91.
• [4] 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.
• [5] K. Sato, Blanking die using urethane-gum, Metal Working Technology (‘Press Gijutsu’) 22/9 (1984) 34-38 (in Japanese).
• [6] K. Sato, T. Asaoka, R. Miya, Study on hole punching with elastic tools, Advanced Technology of Plasticity 3 (1996) 1624-1629.
• [7] F. Takahashi, T. Nishimura, I. Suzuki, A method of blanking from amorphous alloy foils using rubber tool, C.I.R.P. Annals 40/1 (1991) 315-318.
• [8] G. Laszlo, Sheets forming by elastic die I, Rubber, Plastics 60/8 (2007) 484-488 (in Germany).
• [9] G. Laszlo, Sheets forming by elastic die I, Rubber, Plastics 60/9 (2007) 560-564 (in Germany).
• [10] A. Comla, 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.
• [11] 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.
• [12] T. Ohashi, Experimental and Analytical Study on the lateral extrusion with a lost core, Proceedings of the 13th International Science Conference “Achievements in Mechanical and Materials Engineering” AMME'2002, Gliwice – Zakopane, 2002, 391-394.
• [13] 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.
• [14] 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 “Contemporary Achievements in Mechanics, Manufacturing and Material Science” CAM3S’2005, Gliwice – Zakopane, 2005, (CD-ROM).
• [15] Y. Ohno et.al, Measurement and analysis of rheology data, and new technologies for viscosity control, gijutsu-jyoho-kyokai, Tokyo, 2005 (in Japanese).