Abstract
Friction Stir Welding (FSW) is a solid state welding process invented by The Welding Institute (TWI) in 1991. High speed rotating tool with small pin forced to deform work piece material using thermo mechanical action. A small pin with shoulder of tool is plunged into the work piece with axial pressure and traversed along the line of joint. During the welding process, axial force, lateral forces, traverse force and torque are applied on the workpiece which lead to distortion of workpiece materials and fixture; hence design of the fixture should be reliable for proper positioning of workpiece. In this Paper, Types of Probable failures, Cause and Effect analysis, Pre-requisites and reliability based design approach for development of FSW fixture have been discussed in brief. Further modified design was prepared in AutoCAD and FSW fixture is fabricated. Some successful trials are also carried out for testing for reliability. Results shows FSW fixture is reliable to carry out friction stir welding process.
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