Ti6Al4V Malzemesinin Mikro Frezeleme İşleminde Sonlu Elemanlar Yöntemi İle Kriyojenik Soğutmanın Etkisinin İncelenmesi

Year 2021, Volume: 5 Issue: 2, 93 - 100, 31.12.2021

Mehmet Akif Oymak , Erkan Bahçe , İbrahim Gezer

https://doi.org/10.46460/ijiea.948297

Cited By: 2

Abstract

Bu çalışmada, Ti6Al4V alaşımının mikro frezelemede 50,100,150 m/s kesme hızlarında ve 1,2,3 μm/dev ilerleme hızında kuru, sıvı soğutma sıvısı ve LN2 bazlı kriyojenik soğutma uygulamalarının kesme sıcaklıklarına etkileri karşılaştırılmıştır. Farklı parametrelerde, takım, iş parçası-kesme kenarları kriyojenik mikro frezeleme kesim bölgeleri simüle edilmiş ve sıcaklıklar gözlemlenmiştir. Kriyojenik soğutma, kuru ve kesme sıvısı uygulamalarında görülen takım aşınmaları, talaş oluşumu, gerinim, gerilmeler ve kesme kuvvetleri Sonlu Elemanlar yöntemi ile yorumlanmıştır. Ayrıca, bu çalışmada, Arbitrary Lagrange-Eulerian (ALE) simülasyonlarına dayalı bir ağ modeli ve malzeme plastisite ve kırılma kriteri için Johnson-Cook Plastisite modeli kullanılmıştır. Sonuç olarak, 100 m/dk kesme hızında, iş parçası ve kesici kenarlar üzerinde kriyojenik soğutmanın kesme sıcaklığının %57 oranında azalmasına neden olduğu ve ayrıca iç takım kriyojenik üzerinde %54 daha düşük takım aşınması gözlemlendiği belirtilmiştir. 15 iş parçası-kesme kenarlarında kesme gerilmeleri kuru kesmeye göre azaldığı görülmüştür.

Keywords

: Micro frezeleme, Sonlu elemanlar yöntemi, kriyojenik soğutma, Ti6Al4V

Supporting Institution

İnönü üniversitesi BAP birimi

Project Number

FYL-2021-2405

Thanks

İnönü üniversitesi BAP birimine desteklerinden dolayı teşekkür ederim.

Investigation Of Cryogenic Cooling Effect With Finite Element Method In Micro Milling Of Ti6Al4V Material

Abstract

In this study, the effects of dry, liquid coolant and LN2-based cryogenic cooling applications on cutting temperatures at 50,100,150 m/s cutting speeds and 1,2,3 μm/dev feed rate were compared in micro-milling of Ti6Al4V alloy . At different parameters, internal and workpiece-cutting edges cryogenic (wacec) micro-milling cutting zones are simulated temperatures were observed. Cryogenic cooling, dry and liquid coolant applications perceived that tool wear, chip formation, strain, stresses, and shear forces interpreted with the FEM. Also, a mesh model based on Arbitrary Lagrangian-Eulerian (ALE) simulations and the Johnson-Cook Plasticity model for material plasticity failure criterion are used in this study. As a result, indicated that at the cutting velocity of 100 m/min, cryogenic cooling on the workpiece and cutting edges has caused into decreasing %57 of cutting temperature also by %54 lower tool wear was observed on the internal tool cryogenic, by %15 the shear stresses decrease on wacec in comparison with the dry cutting.

Keywords

micro milling, Finite element method (FEM), cryogenic cooling, Ti6Al4V

Project Number

FYL-2021-2405

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