Hasan Basri ULAŞ, Fürğan MİHMAT, Halil DEMİR

DIN 1.2344 sıcak iş takım çeliğinin testere freze çakılarıyla işlenebilirliğinin araştırılması

Bu çalışmada, endüstride geniş bir kullanım alanına sahip olan DIN 1.2344 sıcak iş takım çeliği malzemesinden hazırlanan iş parçaları yüksek hız çeliği (HSS) testere freze çakıları kullanılarak frezeleme işlemine tabi tutulmuştur. Frezeleme deneyleri 5 farklı kesme hızı (20, 25, 30, 40 ve 50 m/dak) ve 5 farklı tabla ilerleme hızında (20, 40, 63, 80 ve 100 mm/dak) ve 1 mm sabit kesme derinliğinde soğutma sıvısı kullanılmadan yapılmıştır. Yapılan frezeleme işlemleri esnasında düşey ve yatay yönlerde oluşan kesme kuvveti bileşenleri ile yüzey pürüzlülük değerleri (Ra) ölçülmüştür. Düşey yönde oluşan kesme kuvvetlerinin (Fz) yatay yönde oluşan kesme kuvvetlerinden (Fx) yaklaşık olarak % 50 daha fazla olduğu görülmüştür. Kesme hızı 20 m/dak olan deneylerde tabla ilerleme hızının artmasıyla yüzey pürüzlülük değerlerini önemli derecede artmıştır.

Anahtar Kelimeler:

Frezeleme, Kesme Kuvvetleri, Yüzey Pürüzlülüğü, Testere Freze Çakısı

An investigation into the machinability of DIN 1.2344 hot work tool steel with circular saw blades

In this study, DIN 1.2344 hot work tool steel, which is widely used in industry, was subjected to milling operations using high speed steel (HSS) circular saw blades. Milling operations were performed at five different cutting speeds (20, 25, 30, 40 and 50 m/min), at five different table feed rates (20, 40, 63, 80 and 100 mm/min) and at a constant depth of cut of 1 mm without using coolant. Vertical and horizontal components of the cutting forces developed during milling operations and the surface roughness values were measured. Vertical cutting force components (Fz) were found to be almost 50 % higher than horizontal cutting force components. At 20 m/min cutting speeds, increasing table feed rate increased the surface roughness values significantly.

Keywords:

Milling, Cutting forces, Surface Roughness, Circular Saw Blade,

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