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Fabrication and vibration analysis on friction stir welding fixture for mass production

Mishra A., Singh R., Rizvi S. A.

Mechanics and Mechanical Engineering

2017

Vol. 21, nr 3

531--540

Friction stir welding was invented for the welding of Aluminium alloys and progressively using for other different metallic alloys which was difficult to welding by other conventional welding method as fusion welding. FSW is a solid state joining welding technique in which material undergoes intense plastic deformation at elevated temperaturę resulting in generation of fine grain microstructure which exhibited good mechanical properties. Development of FSW is considered to be most significant for the industry of aerospace and aircraft, shipping and marine industries, railway industries etc. There was difficulty in mass production of fabrication of soft material like aluminium. That was major challenge. And the second thing was costly FSW machine. To resolve these problems, converted vertical milling machine and flexible fixture had been designed. Fixture was designed using solid works software keeping certain things in view like groove of fixture to be such that it accommodates metal plate to be welded, then manufacturing of fixture was done using different machine tool. Apart from this a two nos. of clamps was also manufactured for holding the plates firmly and subsequently a stopper was also manufactured for the purpose of fixing and balancing of plates to be welded. Design was accommodating butt weld and lap joint both in single frame. The fixture was also investigated vibration analysis for machinery fault diagnosis. The vibration results were satisfactory for welded joints.