INVESTIGATION THE OPTIMUM SPINDLE SPEED AND FEED RATE IN FRICTION DRILLING

Yıl 2013, Cilt 8, Sayı 1, 7 - 17, 01.02.2013

Zülküf DEMİR

Öz

In this study it was drilled 8mm diameter holes to A7075-T651 aluminium alloy, which was 4mm thickness with using friction drilling method. In this study, the selected spindle speeds were 800, 1200, 1600, 2000, 2400, 2800, 3200, 3600, and 4000rpm, feed rates were 20, 40, 60, 80, and 100mm/min and tool material was high speed steel (HSS) tool with 360 conical angle and hl=16mm, tool cylindrical region lengths. It was analysed the optimum spindle speed and feed rate pairs in friction drilling of A7075-T651 aluminium alloy. At result it was investigated that for smaller spindle speeds small feed rates and for high spindle speeds high feed rates were optimum according to surface roughness, bushing height and bushing section thickness criterion.

Anahtar Kelimeler

Friction drilling, Spindle speed, Feed rate, Bushing shape, Surface roughness,

DELMEDE EN UYGUN DÖNME HIZI VE İLERLEME ORANININ ARAŞTIRILMASI

Öz

Bu çalışmada sürtünmeli delme yöntemi kullanılarak kalınlığı 4mm olan A7075-T651 alüminyum alaşımına, 8mm çapında delikler delinmiştir. Delme deneylerinde 800, 1200, 1600, 2000, 2400, 2800, 3200, 3600 ve 4000d/dak dönme hızları, 20, 40, 60, 80 ve 100mm/dak ilerleme oranları kullanılmıştır. Kalınlığı 4mm olan A7075-T651 alüminyum alaşımına, koniklik açısı 360 hl=16mm olan, yüksek hız çeliği (HSS) takımlarla 8mm çapında delikler delinmiştir. Çalışmada, yüzey pürüzlülüğü, kovan yüksekliği, kovan çeper kalınlığı kriterlerine göre en uygun devir sayısı ve ilerleme hızı araştırılmıştır. Çalışmada düşük ilerleme oranları için düşük dönme hızları, yüksek dönme hızları için ise yüksek ilerleme oranlarının uygun olduğu tespit edilmiştir.

Anahtar Kelimeler

Sürtünmeli delme, Dönme hızı, İlerleme hızı, Kovan biçimi, Yüzey pürüzlülüğü,

Kaynakça

• Van Geffen, J.A., (1976). Piercing Tools, US Patent 3.939.683.
• Van Geffen, J.A., (1979). Methods and Apparatuses for Forming by Frictional Heat And Pressure Holes Surrounded Each by a Boss in a Metal Plate Or the Wall of a Metal Tube, US Patent 4. 175. 4
• Van Geffen, J.A., (1980). Rotatable Piercing Tools for Forming Bossed Holes, US Patent 4.185.486.
• Miller, S.F., Tao, j., and Shih, A.J., (2006). Friction Drilling of Cast Metals, International Journal of machine Tool and Manufacture, 46 1526–1535.
• Chow, H.M., Lee, S.M., and Yang, L.D., (2008). Machining Characteristics Study of Friction Drilling on AISI 304 Stainless Steel, Journal of Materials Processing Technology, 207, 180–186. Lee, S.M., Chow, H.M., Huang, F.Y., and Yan, B.H., (2009). Friction Drilling of Austenitic Stainless Steel by Uncoated and PVD AlCrN–TiAlN Coated Tungsten Carbide Tools, International Journal of Machine Tools and Manufacture, 49, 81–88.
• Gopal Krichna, P.V., Kishore, K., and Satyanarayana, V.V., (2010). Some Investigations in Friction Drilling AA6351 Using High Speed Steel Tools, ARPN Journal Engineering and Applied Sciences, 5, 1819–6608.
• Doğru, N., (2010). AISI 1010 Çelik Malzemenin Sürtünmeli Delme Yöntemiyle Delinmesinde İşleme Karakteristiklerinin Araştırılması, Yüksek Lisans Tezi, Fırat Üniversitesi Fen Bilimleri Enstitüsü, Elazığ.
• Miller, S.F., Blau, P., Shih, A.J., (2005). Microstructural Alterations Associated with Friction Drilling of Steel, Aluminum and Titanium, Journal of Materials Engineering and Performance, 14, 647–653.
• Lee, S.M. Chow, H.M., and Yan, B.H., (2007). Friction drilling of IN–713LC cast superalloy, Materials and manufacturing Process, 22, 893-897.
• Miller, S.F., Wang, H., and Shih, A.J., (2006). Experimental and Numerical Analysis of the Friction Drilling Process, Journal of Manufacturing Science and Engineering, 128, 802–810.
• Miller, S.F., and Shih, A.J., (2007). Thermo–Mechanical Finite Element Modelling of the Friction Drilling process, Department of Mechanical Engineering, University of Michigan, Ann Arbor MI 48109, 129, 531–538.