13-10-2014, 12:49 PM
Abstracts: Very less work has been done on laser welding of dissimilar material. This project addresses optimization of process parameters in laser welding operation. Two sheets of stainless steel and copper are cut into small pieces. The small sheets of dimension 80mm*30mm*1mm were cut from the bigger sheet. In this study, a statistical design of experiment (DOE) was used to optimize selected LBW parameters (laser power, welding speed and pulse duration). Taguchi approach was used to design the experimental layout, each factors having four levels. Joint strength was determined using the universal testing machine (UTM). The results were analyzed using analyses of variance (ANOVA) and the signal-to-noise (S/N) ratio for the optimal parameters, and then compared with the base material. Also find out the effect of the focusing position on the response.