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A novel dual-channel weld seam tracking system for aircraft T-joint welds

  • Yu Huang
  • Gen Li
  • WenJun Shao
  • ShiHua Gong
  • XiaoLong Zhang
ORIGINAL ARTICLE

Abstract

Laser welding technology for skin-stringer joints is widely used in aircraft manufacturing. Double-sided laser beam welding of skin-stringer joints is an approved method for producing defect-free welds. The main drawback for the use of single-sided welding method for T-joints is the occurrence of weld defects. To achieve dual-beam laser-welded T-joint, a dual-beam laser welding platform based on multi-axis CNC machine is set up in this paper. A novel control method of double-sided seam tracking and error compensation based on vision sensor is proposed. The weld seams on both sides of the T-joint are detected simultaneously by two vision sensors. At the same time, the welding deviation on both sides of the T-joint are compensated at real time by an independent error compensation control method based on self-adaptive fuzzy-PID controller. The result shows that the dual-beam laser welding system can achieve high precision dynamic deviation compensation in the double-sided welding process at a high speed.

Keywords

T-joint Seam tracking Double-sided welding Dual laser beam Vision sensor Structure light Fuzzy-PID 

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Copyright information

© Springer-Verlag London 2016

Authors and Affiliations

  • Yu Huang
    • 1
  • Gen Li
    • 1
  • WenJun Shao
    • 1
  • ShiHua Gong
    • 1
  • XiaoLong Zhang
    • 1
  1. 1.School of Mechanical EngineeringHuazhong University of Science and TechnologyWuhanChina

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