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JWJ > Volume 24(5); 2006 > Article
Journal of KWJS 2006 October;24(5) :37-42.
Published online January 4, 2007.
A Study on Monitoring for Process Parameters Using Isotherm Radii
Ill-Soo Kim, Kwang-Suk Chon, Joon-Sik Son, Joo-Hwan Seo, Hak-Hyoung Kim, Ji-Yeon Shim





Correspondence:   Published online January 4, 2007
ABSTRACT
  The robotic arc welding is widely employed in the fabrication industry for increasing productivity and enhancing product quality by its high processing speed, accuracy and repeatability. Basically, the bead geometry plays an important role in determining the mechanical properties of the weld. So that it is very important to select the process variables for obtaining optimal bead geometry. In this paper, the possibilities of the Infrared camera in sensing and control of the bead geometry in the automated welding process are presented. Both bead width and thermal images from infrared thermography are effected by process parameters. Bead width and isotherm radii can be expressed in terms of process parameters(welding current and welding speed) using mathematical equations obtained by empirical analysis using infrared camera. A linear relationship exists between the isothermal radii producted during the welding process and bead width.
Keywords: Isotherm radii;Bead width;Process variables;Welding quality
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