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dc.contributor.authorBanegas Carrillo, Isabel Pilar
dc.description.abstractMost kinds of GTAW machines that are available in market are large, solid, expensive and with voluminous power sources. These great machines are water-cooled GTAW machines that require input power and water connections beside the electrical connections, making them heavier and less portable than other welding machines. It could be easily stated that the water-cooled machines´ disadvantages are advantages for air-cooled GTAW. Several producers, like racecar, street or building constructors, would prefer the features of air-cooled welder machines because they are smaller, lighter, and easy to move, less complexity with fewer expensive internal components and less maintenance. However, air-cooled GTAW has a disadvantage that water-cooled GTAW do not have, and it is that its amperage range is much shorter. That is, these machines cannot work with high current or over long times because the torch elements and internal electrical components tent to overheated. Mostly, all air-cooled GTAW that you can find in industrial market have a 200-250 amperes maximum output current. This is the project starting-point; how can we achieve a higher output current of air-cooled GTAW? This project intends to answer to this question. It analyzes the physically behaviour of this torch and tries to improve air-cooled GTAW output power through increasing their cooling capacity. These are the processing steps: 1. Design new model Four prototypes with different geometries were designed and built for making the experiments in the lab. At the same time, four finite element models (FEM) analogous to the real construction were constructed for simulation in Ansys by: (1) creating the geometry, defining material and properties; (2) Defining element type and meshing; (3) Applying the adequate boundary conditions and loads that make the simulations behave as close to physicality as possible. 2. Validation Once all models were built, the prototypes were assembled in the lab and finite element models were ready to simulate, the next step was to validate. In the workshop some experiments were performed with the same experimental conditions for FEM models that were simulated in Ansys. The results of FEM are compared with experimental results to know if its behaviour is similar enough to the prototypes. 3. Variables in heat transfer After comparing Ansys models with the prototype, some variables that might have an influence on heat transfer were simulated to know how the heat transfer in welding torch behaves physically. 4. Conclusion In this last step, a short summary of the results and a discussion of the air-cooled GTAW’s weakness and strengths are made. Also, some possible suggestions for the initial problem are described.
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España*
dc.titleInfluence of constructive materials, geometry and other variables on heat flow and output power of an air-cooled GTAW torches
dc.subject.otherIngeniería Eléctricaes_ES
dc.contributor.advisorFuentes, Julio 
dc.contributor.advisorZschetzsche, J. 
dc.description.centroEscuela Técnica Superior de Ingeniería Industriales

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Atribución-NoComercial-SinDerivadas 3.0 España
Except where otherwise noted, this item's license is described as Atribución-NoComercial-SinDerivadas 3.0 España