INVESTIGATION THE OPTIMUM SPINDLE SPEED AND FEED RATE IN FRICTION DRILLING

Abstract

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.

Keywords

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

DELMEDE EN UYGUN DÖNME HIZI VE İLERLEME ORANININ ARAŞTIRILMASI

Abstract

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.

Keywords

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

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