Asimetrik Dişli Dövme Kalıbının Aşındırıcı Akışkan İle İşlenmesi

Öz

Aşındırıcı Akışkanla İşleme (AAİ) hassas parçaların yüzey işlemesinde kullanılmaktadır. Bu çalışmada, asimetrik düz dişli dövme kalıbının parlatılmasında AAİ işlemi uygulanmıştır. AISI H13'ten yapılmış kalıp bir stok olarak sertleştirilmiş ve temperlenmiş ve asimetrik dişli profili tel elektro erozyon ile kesilmiştir. Kalıbın yüzey kalitesi, (AAİ) çevrim sayısına göre belirlenmiştir. Sonuçlar, asimetrik düz dişli kalıbında, tel elektro erozyon sırasında oluşan beyaz tabakanın AAİ kullanılarak başarıyla kaldırıldığını göstermektedir. Beyaz tabakanın kürecikleri ilk AFM çevriminde kaldırılmış ve beyaz tabakanın ortalama kalınlığı azaltılmıştır. Dördüncü çevrim sonunda beyaz tabaka tamamen kaldırılmıştır. Yüzey pürüzlülük değeri, çevrim sayısıyla azalmıştır. Yüzey iyileştirmesi ilk AAİ çevriminde daha iyidir ve kademeli olarak belli bir seviyeye kadar azalmaktadır. Yüzeyin diş kalınlığı yönündeki son yüzey pürüzlülüğü, aşındırıcı ortamın akışının, akış yönüne paralel olması nedeniyle, evolvent profili yönünden daha iyidir.

Anahtar Kelimeler

• Aşındırıcı akışkanla işleme,yüzey parlatma,Dişli dövme kalıbı,elektro erozyon,asimetrik dişli

Abrasive Flow Machining Of Asymmetric Spur Gear Forging Die

Öz

Abrasive Flow Machining (AFM) is utilized for surface finishing of the precision parts. In the present study, AFM process is applied to finishing of an asymmetric spur gear forging die. The die made of AISI H13 was hardened and tempered as a stock and the asymmetric gear profile was cut by wire electrical discharge machine (WEDM). The surface quality of the die was determined with respect to the number of AFM cycles. The results show that the white layer formed during WEDM is successfully removed by using AFM for asymmetric spur gear forging die. The globules of the white layer were removed in the first AFM cycle and the average thickness of the white layer was reduced. The layer was totally eliminated after four cycles. The surface roughness value decreased with increasing in number of cycles. The surface improvement is better in the first AFM cycle and gradually saturated to a certain level. The final surface roughness along facewidth is better than involute profile direction because the flow of abrasive media is parallel to the facewidth direction.

Anahtar Kelimeler

• Abrasive flow machining,Surface Finishing,Gear Forging Die,Electro Erosion,Asymmetric gear

Kaynakça

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