Mikro işlemede takım aşınması-kanal geometrisi ilişkisi üzerine deneysel bir çalışma

Kubilay Aslantaş, Adem Çiçek, Safiye Gülbin Çelik
646 79

Öz


Bu çalışmada, mikro frezeleme işleminde takımda meydana gelen aşınmanın kanal geometrisi üzerinde etkisi deneysel olarak araştırılmıştır. Deneylerde, iş parçası olarak Inconel 718 alaşımı tercih edilmiş olup, sabit kesme parametreleri dikkate alınmıştır. Deneyler kuru kesme şartlarında yapılmış olup, ardışık kesme işlemleriyle mikro kanallardaki boyutsal değişim, çapak oluşumu ve kesme kuvvetlerindeki değişim araştırılmıştır. Elde edilen sonuçlara göre takım çapında meydana gelen çevresel aşınma artan kesme mesafesi ile artmaktadır. Takımda çevresel aşınmanın yanı sıra eksenel bir aşınma da meydana gelmektedir. Eksenel aşınma, takım köşe radüsünün zamanla değişmesine neden olmaktadır. Köşe radüsünün artması kanal geometrisinin bozulmasına ve çapak oluşumunun artmasına neden olmaktadır. Ayrıca kesici takıma yapışan talaş ta köşe radüsünün büyümesine neden olmaktadır. Bunun sonucunda kesme işlemi, kazınma ağırlık bir kesmeye dönüşmekte ve kesme kuvvetleri de artmaktadır.

Anahtar kelimeler


Mikro frezeleme, Takım aşınması, Çapak oluşumu, Kanal geometrisi

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