Hacı Bekir ÖZERKAN, Ferah SUCULARLI, Asim GENÇ

AISI 8740 çeliğinin frezelenmesinde kesme gücü, özgül kesme enerjisi ve yüzey pürüzlülüğü karakteristiklerinin belirlenmesi

Bu çalışmada, endüstride yüksek mukavemet gerektiren uygulamalarda kullanılmasına rağmen talaşlı imalatla ilgili karakterizasyon özellikleri (kesme gücü Pc, özgül kesme enerjisi ps ve yüzey pürüzlülüğü Ra) hakkında bilgi bulunmayan 8740 çeliğinin deneysel olarak Pc, ps ve Ra değerleri değişik işleme parametreleri (diş başı ilerlemesi fz ve zıt- ve eş-yönlü frezeleme işlemleri) için bulunmuştur. Tezgâhın değişik işleme koşullarındaki güç hesaplamalarında şebekeden çekilen akım değerleri (işleme olmadan ve işleme sırasında) kullanılmıştır. fz değerinin artışıyla zıt- ve eş-yönlü frezeme işlemlerinde ps değerinin azaldığı, Ra değerlerinin arttığı, eş yönlü frezelemede zıt yönlü frezelemeye göre daha düşük Pc, ps ve Ra değerleri elde edildiği tespit edilmiştir. Malzemenin ps değerleri deneylerde kullanılan kesme koşulları için 7,1-15,7 Ws/mm3 değerleri arasında bulunmuştur.

Anahtar Kelimeler:

AISI 8740 çelik, zıt- ve eş-yönlü frezeleme, kesme gücü, özgül kesme enerjisi, yüzey pürüzlülüğü

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