The Investigation of Temperature Distribution and Thermal Problems in DMLS Additive Manufacturing

Year 2019, Volume: 7 Issue: 1, 79 - 94, 15.01.2019

Mevlüt Yunus Kayacan , Nihat Yılmaz

https://doi.org/10.21541/apjes.408921

Abstract

In this study,
studies on unstable temperature distribution, one of the biggest problems of
joint manufacturing, have been evaluated. Heterogeneous temperature
distributions, residual stresses and dimensional changes were investigated,
which are the most important factors in manufacturing faults. The problems that
arise during manufacturing in different types of metal materials have been
evaluated in terms of direct metal laser sintering (DMLS) and manufacturing
method. The faulty effect of manufacturing parameters has been investigated.
Different approaches on pre-manufacturing temperature and error estimation were
also discussed with finite element analysis. As a result, what needs to be done
to rectify the mistakes is revealed in the light of the available information.

Keywords

DMLS, sintering, parameter, thermal effect, residual stresses, powder bed fusion

DMLS İle Eklemeli İmalatta Dengesiz Sıcaklık Dağılımı Ve Parçaya Etkilerinin Araştırılması

Abstract

Bu Çalışma, eklemeli imalatın en
önemli problemlerinden bir tanesi olan dengesiz sıcaklık dağılımı üzerine
yapılan çalışmaların araştırılmasını konu almaktadır. İmalat esnasında meydana
gelen hatalara etki eden önemli parametrelerden olan heterojen sıcaklık
dağılımı, kalıntı gerilemeler ve boyutsal değişimler araştırılmıştır. Farklı
tip metal malzemelerin doğrudan metal lazer sinterleme (DMLS) yöntemi ile
imalatı esnasında parça üzerinde meydana gelen sorunlar incelenmiştir. İmalat
parametrelerinin meydana gelen hatalara olan etkisi incelenmiştir. Sonlu
elemanlar analizleri ile imalat öncesi sıcaklık ve hata tahmini konusunda
gerçekleştirilmiş farklı yaklaşımlar da ele alınmıştır. Sonuç olarak hataların
giderilmesi konusunda yapılması gerekenler, mevcut bilgiler ışığında ortaya
konulmuştur.

Keywords

DMLS, sinterleme, parametre, termal etki, kalıntı gerilmeler, toz yatak eklemeli imalat

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