2014-15

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Browsing 2014-15 by Subject "Athul S"

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    Design And Analysis Of Welding Fixtures For Pipe Assembly
    (2015-12-23T12:53:03Z) Athul, S; Nabeel, Latheef; Vishnu, K; Yaseen, Shibas
    The project focuses on the design and validation of welding fixtures for aircraft welded pipe structures. The purpose of a welding fixture is to hold the parts to be welded in the proper relationship both before and after welding. The pipe assemblies are widely used in engine systems and pressurization units of the aircraft. The application of these pipes are to carry fuel, oil, coolant, oxygen and hydraulic lines. As the pipe structure is designed to attain high strength to weight ratio, the pipe sections are thin. Thin pipes & bracket elements are susceptible for weld distortions. These elements have to be located & clamped properly, so that the distortions due to clamping as well as welding should be minimal. For such high quality welding, with interchangeability, repeatability and reliability, the design of fixture becomes critical. During welding there exists high thermal stresses on the component and the fixture should have enough provisions to arrest or minimize the weld distortions. The fixtures have to address all the functional requirements and also should be realized at economical prices. These fixtures will be used for batch production of the airworthy weld quality pipe structures. All the modelling & drafting of the welding fixtures is carried out using UNIGRAPHICS NX8. The thermal analysis and stress analysis is carried out using NX NASTRAN