Product Code: PIC06_202

Effect of Laser Welding Parameters on Welding Defects Analyzed by the Analytic Hierarchy Process
Authors:
Naoki Seto, National Institute of AIST; Tsukuba, Ibaraki Japan
Kazuo Mori, Digital Manufacturing Research Center, National Institute of AIST; Tsukuba, Ibaraki Japan
Shingo Hirose, Digital Manufacturing Research Center, National Institute of AIST; Tsukuba, Ibaraki Japan
Presented at PICALO 2006

The analytic hierarchy process (AHP) has been widely used for the decision-making method. By adapting AHP in laser welding, we think that we can analyze expert's skills. In this presentation, we investigate the effect of laser parameters on welding defects using AHP in case of getting proper laser welding bead with relatively good tensile strength as well as a base material. By comparing expert's skill of factory engineer and researcher at National Institute, experts considered that the most undesirable welding defect is "Clack", independent of the expert's job experience and environments. In addition, when suppressing welding defects, factory engineer thought that "Welding speed" is the priority adjusting parameter. On the other hand, expert worked at Institute selected "Pulse frequency" as the primary adjusting parameters. These results reflect well expert's job experience and environments. Thus, AHP is an effective method to analyze laser welding expert's skills.