Abstract
Owing to the increasing use of polymers in microfluidic devices, lightweight automotive and modern industries, laser transmission welding has evolved as a reliable method over the years. In this paper, sensitivity analysis has been performed to find out the critical parameters and to compare the relative impact of process variables on weld quality. Two transparent PMMA materials have been joined using low power laser with 1064 nm wavelength. The results are analyzed for laser transmission welding processes by considering corresponding parameters such as laser power, pulse frequency and scanning speed. Scanning speed is found to be dominant parameter based on statistical method while sensitiveness of weld strength and weld width are maximum for laser power. Optimization of process variable helps to obtain desired responses. A novel metaheuristic Teaching Learning Based Algorithm has been used to maximize the weld strength and minimize the weld width.
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