Product Code: ICA12_609

The Study About the Algorithm of the Detecting Feature on Weld Images During Laser Welding Processes
Authors:
Chen Xinsong, National Key Laboratory of Science and Technology on Power Beam Processes, BAMTRI; Beijing Peoples Republic of China
Duan Aiqin, National Key Laboratory of Science and Technology on Power Beam Processes, BAMTRI; Beijing Peoples Republic of China
Wang Bin, National Key Laboratory of Science and Technology on Power Beam Processes, BAMTRI; Beijing Peoples Republic of China
Presented at ICALEO 2012

In laser welding important components, precise seam tracking usually needs to be used to assure the quality of final weld, because of small laser beam focus diameter and high welding speed. In the seam tracking technology, one of the key problems is the extracting of the weld track feature at high speed and accuracy. In this paper, based on wavelet transform algorithm, a novel edge detecting method was proposed to be used on pattern recognition in weld seam tracking applications. This wavelet edge detecting method can offer an effective solution to the contradiction between measuring precision and dealing speed during real time seam tracking. It can make the precise and high speed seam tracking needed during laser welding. Many experiment results show that by using this method more integrity edges and more details can be abstained easily, and the more precise weld position can be acquired. Finally, the good quality welds have been completed in many Ti-alloy components.