HASAN GÖKKAYA, GÖKHAN SUR, HAKAN DİLİPAK

PVD VE CVD kaplamalı sementit karbür kesici takımların işleme parameterlerine bağlı olarak yüzey pürüzlülüğüne etkisinin deneysel olarak incelenmesi

Bu çalışmada, kesici takım kaplama malzemeleri ve işleme parametrelerinden kesme hızı ile ilerleme hızının iş parçası yüzey pürüzlülüğü üzerindeki etkileri araştırılmıştır. Bu amaçla, AISI 1030 çeliği farklı kaplama malzemesine sahip kesici takımlarla, bilgisayarlı sayısal denetimli (BSD) torna tezgahında soğutma sıvısı kullanılmadan işlenmiştir. Deneyler, CVD yöntemiyle üç katlı kaplama uygulanmış (en üstte TiN kaplı), PVD yöntemiyle AlTiN ve TiAlN kaplanmış üç farklı sementit karbür takımla, kesme derinliği sabit tutularak (2 mm) üç farklı kesme hızı (100, 200, 300 m/dak) ve beş farklı ilerleme hızı (0.25, 0.30, 0.35, 0.40, 0.45 mm/dev) değerlerinde talaş kaldırma işlemleri gerçekleştirilerek, bu parametrelerin yüzey pürüzlülüğü üzerindeki etkileri incelenmiştir. Kaplama malzemesi, ilerleme ve kesme hızının yüzey pürüzlülüğü üzerinde farklı etkilere sahip parametreler olduğu görülmüştür. Gerçekleştirilen deneylerde en düşük ortalama yüzey pürüzlülüğü, en üstte TiN kaplı kesici takımla elde edilmiştir. İlerleme miktarının % 80 azaltılmasıyla yüzey pürüzlülüğünde % 176 iyileşme sağlanmış, kesme hızının % 200 artırılması ile de yüzey pürüzlülüğünde % 13 iyileşme elde edilmiştir.

Experimental investigating of the effect of cemented carbide cutting tools coated by PVD and CVD on surface roughness according to machining parameters

In this study, steel AISI 1030 was machined a with cutting tool coated by different elements on a CNC lathe without using cooling liquid. These experimental studies were executed with three different cemented carbide coated with three layers (top layer is TiN) using CVD method and coated with AlTiN and TiAlN using PVD method. The cutting processes were performed with three different cutting speed values (100,200,300 m/min)and five different feed rate values (0.25, 0.30, 0.35, 0.40, 0.45 mm/rev) keeping depth of cut (2 mm) constant and the effects of these parameters on surface roughness were investigated. It was observed that the coating types, feed rate and cutting speed are the parameters having different effects on surface roughness. From the result of these experimental studies it was obsorved that the minimum average surface roughness value was obtained using coated TiN on top. With reducing of feed rate about 80 percent the improving was provided about 176 percent and with increasing of cutting speed about 200 percent the improving was obtained about 13 percent in surface roughness.

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