SEAM TRACKING DURING LASER BEAM WELDING OF TAILORED BLANKS WITH VISION SENSOR
The main challenges in modern design of automobile bodies are reduction in weight and maximization of the structural stiffness and passive safety. The “tailored blank has contributed to achieving a significant weight reduction which is single flat sheets joined by laser welding into the desired configuration without filler wire. Production of laser beam welded tailored blanks requires high speed, high precision and high quality. The welding robots that follow a preprogrammed path are often not able to guarantee a sufficient weld seam quality. Therefore, a seam tracking system is used to improve the reliability of the seam quality prediction. This paper describes the development of the seam tracking system for laser beam welding of tailored blanks. The system consists of DSP based vision camera and stripe-type laser diode. The total system is assembled into a compact module which can be attached ahead of welding torch. The images taken by the camera are analyzed using image processing algorithms. The image processing algorithms for extracting the feature points of weld seam are discussed depending on the characteristics of laser beam welding of tailored blanks. The accuracy of the industrial robots during the laser welding process was guaranteed by the compensation method A prototype sensor system has been developed and experimental results show its effectiveness and good performance.
Yuanyuan Zou Mingyang Zhao Lei Zhang Chunying Jiang
Shenyang Institute of Automation, Chinese Academy of Science Nanta Street, Shenyang, China Graduate Graduate School of the Chinese Academy of Sciences Beijing, China
国际会议
第三届太平洋国际激光与光学应用会议(PICALO 2008)
北京
英文
587-591
2008-04-16（万方平台首次上网日期，不代表论文的发表时间）