Abstract
Performance evaluation of the transistorized and invertor type GMAW power source under various modes of operations as continuous, pulsed and dual pulse is discussed in this paper. The performance of the power source has been evaluated with respect to the variation of current and voltage under different wire feed rates. The data is analyzed for identification of optimum working range of current and voltage with reference to less spatter, porosity and good weld bead appearance. Based on the results, the choice of the GMAW power sources for different applications is established. This study provides wider scope for introduction of automation of welding.
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