论文信息 - Development of Coaxial Monitoring System in Laser Arc Hybrid Welding for Automotive Body Application

Development of Coaxial Monitoring System in Laser Arc Hybrid Welding for Automotive Body Application

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.

Young Whan Park | Sehun Rhee | Cheolhee Kim

[1] Eckhard Beyer,et al. On-Line Plasma Diagnostics For Process-Control In Welding With CO2 Lasers , 1989, Other Conferences.

[2] D. J. Brookfield,et al. Laser process monitoring with dual wavelength optical sensors , 1991 .

[3] Kenji Ohshima. Observation and control of weld pool phenomena in arc welding , 1990 .

[4] Ronald G.K.M. Aarts,et al. Penetration control in laser welding of sheet metal , 2002 .

[5] Elijah Kannatey-Asibu,et al. Sensor systems for real-time monitoring of laser weld quality , 1999 .

[6] D. Farson,et al. Relationship of optical and acoustic emissions to laser weld penetration , 1998 .

[7] Isamu Miyamoto,et al. Detection of Weld Defects in Tailored Blanks. Development of In-Process Monitoring System for Laser Welding (Rept. 1). , 1996 .

[8] Hongxiang Wang,et al. Front image sensing of the keyhole puddle in the variable polarity PAW of aluminum alloys , 1998 .

[9] Radovan Kovacevic,et al. Monitoring of weld joint penetration based on weld pool geometrical appearance , 1996 .

[10] Klaus Behler,et al. Practical applications of in-process monitoring for laser processes - Not only for single welds and common materials , 2004 .