Advances of orbital gas tungsten arc welding for Brazilian space applications - experimental setup
| Autor: | Nivio Fernandes Nogueira, Nilton Souza Dias, Gérson Luiz de Lima, José Augusto Orlowski de Garcia, Wilson D. Bocallão Pereira |
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| Rok vydání: | 2010 |
| Předmět: |
Titanium
Materials science lcsh:T lcsh:Motor vehicles. Aeronautics. Astronautics Gas tungsten arc welding Aerospace Engineering Laser beam welding Mechanical engineering Welding Electrogas welding Electric resistance welding lcsh:Technology law.invention Robot welding Satellite law Welding power supply Arc welding lcsh:TL1-4050 Orbital GTA welding |
| Zdroj: | Journal of Aerospace Technology and Management v.2 n.2 2010 Journal of Aerospace Technology and Management Departamento de Ciência e Tecnologia Aeroespacial (DCTA) instacron:DCTA Journal of Aerospace Technology and Management, Volume: 2, Issue: 2, Pages: 203-210, Published: AUG 2010 Journal of Aerospace Technology and Management, Vol 2, Iss 2, Pp 203-210 (2010) |
| ISSN: | 2175-9146 |
| DOI: | 10.5028/jatm.2010.02026610 |
| Popis: | The present work describes details of the several steps of the technology involved for the orbital Gas Tungsten Arc Welding (GTAW) process of pure commercially titanium tubes. These pieces will be used to connect the several components of the propulsion system of the China-Brazilian Satellite CBERS, and is part of the Brazilian aerospace industry development. The implantation involved the steps of environment control; cut and facing of the base metal; cleaning procedures; piece alignment; choice of the type, geometry and installation of the tungsten electrode; system for the pressure of the purge gas; manual tack welding; choice of the welding parameters; and, finally, the qualification of welding procedures. Three distinct welding programs were studied, using pulsed current with increasing speed, continuous current and pulsed current with decreasing amperage levels. The results showed that the high quality criteria required to the aerospace segment is such that usual welding operations must be carefully designed and executed. The three welding developed programs generated welds free of defects and with adequate morphology, allowing to select the condition that better fits the Brazilian aerospace segment, and to be implanted in the welding of the CBERS Satellite Propulsion System. |
| Databáze: | OpenAIRE |
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