Design, fabrication of a semi-automatic welding fixture for circumferential joining of cylinders using tig welding

Abstract

This paper presents the systematic approach of design, fabrication of a semi-automatic welding fixture for circumferential joining of cylinders and testing the welded samples obtained. The TIG welding unit is used to make a circumferential joining on tank and piping, which are fixed onto the welding fixture and several parameters such as the setting of voltage, current and travel speed (rotational speed) is used for fabrication setup. The fabrication fixture with a constant rotation speed is obtained by revolving the tank or pipe with an electrical adjustable speed control motor. The report is focused on the welding of the aluminum workpiece using TIG welding. The joint of mechanical properties is determined by a static tensile test, impact test, and hardness test. This fixture, all the parameters can be determined, and it's an easy way to get the constant shape of welding joint at all joining by using the welding fixture, the evaluation by determination of joining quality can easily be used, especially for circumferential joint on tank and piping with a cylindrical shape.