Asimetrik Dişli Dövme Kalıbının Aşındırıcı Akışkan İle İşlenmesi

Yıl 2019, Cilt: 4 Sayı: 1, 12 - 20, 30.04.2019

Ömer Eyercioğlu , Kürşad Göv , Adem Aksoy

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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