Additive manufacturing with GMAW welding and CMT technology

Gonzalez, Javier M.; Rodriguez, Iker; Prado-Cerqueira, J-L.; Diéguez, José Luis Rodríguez; Pereira, Alejandro

doi:10.1016/j.promfg.2017.09.189

Cited by 48 publications

(20 citation statements)

References 9 publications

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“…A suitable approach for the additive manufacturing of large volume components is the usage of arc-based manufacturing processes. In particular, wire arc additive manufacturing (WAAM) with gas metal arc welding (GMAW) is of high interest due to high deposition rates, material efficiency > 90% and the almost unlimited space available [5]. In addition, WAAM offers the possibility to create complex geometries, which allows the production of novel, lightweight structures [6].…”

Section: Introductionmentioning

confidence: 99%

Wire Arc Additive Manufacturing (WAAM) of Aluminum Alloy AlMg5Mn with Energy-Reduced Gas Metal Arc Welding (GMAW)

et al. 2020

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Large-scale aluminum parts are used in aerospace and automotive industries, due to excellent strength, light weight, and the good corrosion resistance of the material. Additive manufacturing processes enable both cost and time savings in the context of component manufacturing. Thereby, wire arc additive manufacturing (WAAM) is particularly suitable for the production of large volume parts due to deposition rates in the range of kilograms per hour. Challenges during the manufacturing process of aluminum alloys, such as porosity or poor mechanical properties, can be overcome by using arc technologies with adaptable energy input. In this study, WAAM of AlMg5Mn alloy was systematically investigated by using the gas metal arc welding (GMAW) process. Herein, correlations between the energy input and the resulting temperature–time-regimes show the effect on resulting microstructure, weld seam irregularities and the mechanical properties of additively manufactured aluminum parts. Therefore, multilayer walls were built layer wise using the cold metal transfer (CMT) process including conventional CMT, CMT advanced and CMT pulse advanced arc modes. These processing strategies were analyzed by means of energy input, whereby the geometrical features of the layers could be controlled as well as the porosity to area portion to below 1% in the WAAM parts. Furthermore, the investigations show the that mechanical properties like tensile strength and material hardness can be adapted throughout the energy input per unit length significantly.

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Section: Introductionmentioning

confidence: 99%

Wire Arc Additive Manufacturing (WAAM) of Aluminum Alloy AlMg5Mn with Energy-Reduced Gas Metal Arc Welding (GMAW)

et al. 2020

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“…By virtue of this principle, the temperature of welding temperature is reduced and the wire movement is optimized. As a result of this, the quality of weld beads is better than using conventional GMAW welding [ 39 ].…”

Section: Methodsmentioning

confidence: 99%

Analysis of Favorable Process Conditions for the Manufacturing of Thin-Wall Pieces of Mild Steel Obtained by Wire and Arc Additive Manufacturing (WAAM)

et al. 2018

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One of the challenges in additive manufacturing (AM) of metallic materials is to obtain workpieces free of defects with excellent physical, mechanical, and metallurgical properties. In wire and arc additive manufacturing (WAAM) the influences of process conditions on thermal history, microstructure and resultant mechanical and surface properties of parts must be analyzed. In this work, 3D metallic parts of mild steel wire (American Welding Society-AWS ER70S-6) are built with a WAAM process by depositing layers of material on a substrate of a S235 JR steel sheet of 3 mm thickness under different process conditions, using as welding process the gas metal arc welding (GMAW) with cold metal transfer (CMT) technology, combined with a positioning system such as a computer numerical controlled (CNC) milling machine. Considering the hardness profiles, the estimated ultimate tensile strengths (UTS) derived from the hardness measurements and the microstructure findings, it can be concluded that the most favorable process conditions are the ones provided by CMT, with homogeneous hardness profiles, good mechanical strengths in accordance to conditions defined by standard, and without formation of a decohesionated external layer; CMT Continuous is the optimal option as the mechanical properties are better than single CMT.

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“…Tel ark eklemeli imalat işlemi özelleştirilmiş büyük parçaların düşük maliyette üretilmesinde diğer metal eklemeli yöntemlere göre önemli derecede dikkat çekici bir yöntem olmuştur [9]. Bu yöntem gazaltı ark kaynağı ekipmanına, numerik kontrollü freze tezgahı veya bir robot eklenerek uygulanabilir [14]. Titanyum, alüminyum, çelik ve diğer metal malzemeler içeren 10 kg'dan daha ağır büyük bileşenler tel eklemeli imalat yöntemiyle üretilebilir [7].…”

Section: şEkil 2 Metal Eklemeli Imalat Işlemleriunclassified

3B Metal Yazıcı Kullanılarak MIG-MAG Kaynak Yöntemi İle Tamir-Onarım Kaynak Uygulamasına Bir Örnek

Ayan¹,

Sarı²,

Kahraman³

2018

Düzce Üniversitesi Bilim Ve Teknoloji Dergisi

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Bu çalışmada; MIG-MAG kaynak ünitesi, 3B metal yazıcıya monte edilerek MAG kaynak yöntemi ile bir tamironarım kaynak işlemi gerçekleştirilmiştir. Bu amaç için kırılmış kabul edilen bir makine dişlisi kullanılmıştır. Kırılmış dişlinin tasarımı bilgisayar destekli ortamda tasarlanıp lazer kesme işlemi ile üretilmiştir. Daha sonra kırık olan dişli parçaları hassas bir şekilde 3B metal yazıcının tablasına sabitlenmiştir. 3B yazıcıyla metal malzeme ve plastik malzeme biriktirme işlemleri arasında önemli bir fark bulunmaktadır. 3B yazıcılarda plastik malzeme kullanıldığında çalışma sıcaklığı yaklaşık 190-200 °C arasında iken metal malzeme ergitilirken çalışma sıcaklığı yaklaşık 3000-4000 °C'ye ulaşır. Bu çalışma sıcaklığının çok yüksek olması 3 boyutlu metal yazıcının çalışmasını olumsuz yönde etkilemektedir. Bu nedenle çalışmada metal doldurma işlemini gerçekleştirmek için 3 boyutlu metal yazıcıda önemli uyarlamalar yapılmıştır. Kırık dişli parçalarının tamir edilecek bölgesini doldurma işlemi MAG kaynağı ile ilk ikisi parçanın üst tarafından diğer ikisi ise alt tarafından olacak şekilde dört pasoda gerçekleştirilmiştir.

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Additive manufacturing with GMAW welding and CMT technology

Cited by 48 publications

References 9 publications

Wire Arc Additive Manufacturing (WAAM) of Aluminum Alloy AlMg5Mn with Energy-Reduced Gas Metal Arc Welding (GMAW)

Wire Arc Additive Manufacturing (WAAM) of Aluminum Alloy AlMg5Mn with Energy-Reduced Gas Metal Arc Welding (GMAW)

Analysis of Favorable Process Conditions for the Manufacturing of Thin-Wall Pieces of Mild Steel Obtained by Wire and Arc Additive Manufacturing (WAAM)

3B Metal Yazıcı Kullanılarak MIG-MAG Kaynak Yöntemi İle Tamir-Onarım Kaynak Uygulamasına Bir Örnek

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