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Journal of KWJS 2009;27(6):9-16.
Published online January 13, 2010.
자동차 차체 적용을 위한 레이저-아크 하이브리드 용접의 동축 모니터링 시스템 개발
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Development of Coaxial Monitoring System in Laser Arc Hybrid Welding for Automotive Body Application
YoungWhan Park, Sehun Rhee, Cheolhee Kim
Abstract
  In this paper, the coaxial monitoring system to capture image of weld pool was developed in laser-arc hybrid welding. In order to obtain the reliable image, green laser was used as a illumination system and measuring components such as band pass filter, ND (Neutral Density) filter and shutter speed was designed and optimized. Using this monitoring system, weld pool images were captured according to laser power, welding speed, welding current and interspace between laser and arc through the experiment. ANOVA (Analysis of Variation) was carried out to identify the influence of process variables on bead widths extracted from captured images of monitoring system. Welding speed and current were major factor to affect weld pool.
Key Words: Laser-arc hybrid welding, Coaxial monitoring, Illumination system, Optical filter, Bead width measurement, ANOVA


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