MUAMMER GAVAS, UĞUR KÖKLÜ, Yunus Emre ALPARSLAN

Merkezi delikli Al-1050 sac malzemenin derin çekme özelliklerinin incelenmesi

Sac metal sekillendirme yöntemlerinden biri olan derin çekme metodu endüstride sıkça kullanılmaktadır. Otomobil parçaları, mutfak araç ve gereçleri, mesrubat ve parfüm kutuları, tüpler v.b. ürünler derin çekme yöntemiyle üretilmektedir. Bu nedenle derin çekme yöntemini gelistirmek için çesitli arastırmalar yapılmaktadır. Derin çekmede düz sac levhaların yanında bazen delikli saclar veya metal örgülü malzemeler kullanılarak da çesitli parçalar üretilmektedir. Yapılan bu çalısmada merkezi delikli Al-1050 sac malzemelerin artan delik çaplarındaki derin çekme davranısları, imalatta bilimsel arastırma yöntemlerinden bir tanesi olan deneysel çalısma ile arastırılmıstır. Deneylerde dört farklı kalınlıkta malzeme kullanılmıstır. Deneylerde kullanılan parçaların merkezine Ø5 mm delik delinmis, bir sonraki deney için bu deliklerin çapları 1 mm artırılmıstır. Bu sekilde hazırlanan delikli alüminyum malzemelerin silindirik derin çekmeye olan etkisi deneysel olarak incelenmistir. Farklı kalınlıktaki sac malzemelerin yırtılmadan çekilebildiği maksimum delik çapları tespit edilmistir.

The investigation of deep drawing features of Al-1050 sheet with a central hole

Deep drawing is one of the forming methods of sheet metal used frequently in industry. Products like an automobile parts, saucepans, beverage and perfume cans, tubes etc. have been manufactured via deep drawing method. For this reason, a lot of researches have been carried out to improve the deep drawing. Materials used in deep drawing can be sheet metal or blank having a hole on it and metal-wire cloth. In this study, deep drawing behaviors of blanks with in the central hole have been researched by using experimental method, which is one of the scientific investigation techniques in manufacturing. In the experiments sheet materials having four different thicknesses have been used. Ø 5 mm holes have been drilled to the central of the blanks used in the experiment and diameters of these holes have been increased 1 mm for the next experiment. The effects of these blanks with holes have been investigated experimentally on the cylindrical deep drawing. The maximum hole diameter of the sheet metal blanks, which are in different thicknesses, have been determined without being failure.

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1. Guo, Y.Q., Batoz, J.L., Naceur, H., Bouabdallah, S., Mercier F., Barlet, O., 2000, “Recent Developments on the Analysis and Optimum Design of Sheet Metal Forming Parts Using a Simplified Inverse Approach”, Computers and Structures, 78, 133-148.
2. Gavas, M., Izciler, M., 2006, “Deep Drawing with Anti-Lock Braking System (ABS)”, Mechanism and Machine Theory, 41, 1467–1476.
3. Yasar, M., Demirci, H.I., Kadi, I., 2006, “Detonation Forming of Aluminium Cylindrical Cups Experimental and Theoretical Modeling”, Materials and Design, 27, 397–404.
4. Demirci, H.I., Esner, C., Yasar, M., 2008, “Effect of the Blank Holder Force on Drawing of Aluminum Alloy Square Cup: Theoretical and Experimental Investigation” Journal of Materials Processing Technology 206, 152–160.
5. Demirci, H.I., Yasar, M., Demiray, K., Karalı, M., 2008, “The Theoretical and Experimental Investigation of Blank Holder Forces Plate Effect in Deep Drawing Process of Al-1050 Material, Materials and Design, 29, 526–532.
6. Takuda, H., Hatta, N., 1998, “Numerical Analysis of Formability of a Commercially Pure Zirconium Sheet in Some Sheet Forming Processes”, Materials Science and Engineering, 242, 15–21.
7. Takuda, H., Kikuchi, S., Hatta, N., 1998, “Formability of a Commercially Pure Zirconium Sheet”, Journal of Materials Processing Technology, 84, 117–121.
8. Takuda, H., Mori, K., Fujimoto, H., Hatta, N., 1999, “Prediction of Forming Limit in Bore- Expanding of Sheet Metals using Ductile Fracture Criterion”, Journal of Materials Processing Technology 92-93, 433-438.
9. Takuda, H., Tanaka, Y., Hatta, N., 1998, “Finite Element Analysis of Forming Limit in Bore Expanding of Aluminium Alloy Sheets” Archive of Applied Mechanics, 68, 566-576.
10. Zhiheng, W., Zheng, T., 1992, “Critical Calculations and Experimental Research on the Drawing of a Sheet with a Hole”, Journal of Materials Processing Technology, 31, 75-84.
11. Thiruvarudchelvan, S., Tan, M.J., 2007, “Investigations into Collar Drawing using Urethane Pads”, Journal of Materials Processing Technology, 191, 87-91.
12. Yeh, F.H., Lu, Y.H., Li, C.L., Wu, M.T., 2006, “Application of ANFIS for Inverse Prediction of Hole Profile in the Square Hole Bore-Expanding Process”, Journal of Materials Processing Technology, 173, 136-144.
13. Lu, Y.H., Yeh, F.H., Li, C.L., Wu, M.T., 2005, “Study of using ANFIS to the Prediction in the Bore- Expanding Process”, Int. J. Adv. Manufacturing Technology 26, 544–551.