Farklı Kalınlıklardaki Dkp Sacın Farklı Açılarda Yapılan V-Bükme İşlemindeki Geri Esnemelerinin İncelenmesi

Sac malzemelerin şekillendirilmesinde karşılaşılan en büyük problemlerden biri geri esnemedir. Sac malzemede oluşan geri esneme, istenilen ölçülerin değişmesine yol açar bu da istenilmeyen bir olaydır. Kalıptan çıkacak parçanın istenilen tolerans sınırları içinde olması için bükme kalıplarında bükülen sac malzemelerin geri esneme miktarlarının bilinmesi bu yüzden çok önemlidir. Bu çalışmada, V-bükme kalıplarında geri esnemenin deneysel olarak tespiti araştırılmıştır. Geri esneme miktarlarının belirlenebilmesi için bir V-bükme kalıbı tasarlanmış, deney malzemesi olarak DKP sac kullanılmıştır. Numuneler 60, 90 ve 120 derece olan V-bükme kalıp açılarında ve her açı için de 2 mm ve 6 mm olan farklı zımba radyüs değerleri kullanılarak bükme yapılmıştır. Geri esneme deneylerinde her bir parametre için 5 er adet numune bükülerek test yapılmıştır. Deney sonrası bükülmüş olan numunelerin geri esnemeleri açı ölçer ve optik projeksiyon cihazı kullanılarak ölçülmüş olup sonuçlar grafikler üzerinde gösterilmiştir

Examining The Springback Of Dkp Sheet With Different Thickness In The V-Bending Process Carried Out In Different Angles

One of the biggest problems in forming sheet metals is to springback. Springback which occurs in material causes to change of the necessary measures and this is an unwanted event. It is vital to know that springback quantity of bending materials in V-bending mould so as to be the piece in tolerance limits. In this study, the evaluation of springback in V-bending mould was empirically researched. In order to determine the quantity of springback, a V-bending mould was designed, DKP was used as test equipment. The specimens were in 60, 90 and 120 V-bending mould angle and they were bended by using 2 and 6 mm different punch radius rate in every angle. In springback tests, test was made by bending 5 speciments for every parameter. After the test, springbacks of the speciments that were bended was measured by using protractor and optical projection device and the results were shown on the graphs

Keywords:

V bending, springback, bending angle thickness, punch radius,

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