Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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Development of an Effective Arc Sensing Algorithm for Seam-Tracking in Flux-Cored Arc Welding Process for Horizontal Fillet Joints

FCAW 수평 필릿용접용 용접선추적을 위한 아크센싱 알고리즘 개발

  • 권순창 (대우중공업(주) 선박해양기술연구소, 아주대학교 시스템공학과) ;
  • 최재성 (고등기술연구원 생산기술연구실) ;
  • 장낙영 (고등기술연구원 생산기술연구실)
  • Published : 1997.02.01
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Abstract

This paper describes a newly developed arc-sensing algorithm of seam-tracking for FCA W (flux-cored arc welding) horizontal fillet welding. In this algorithm, arc current and the Weighted-Are-Current (WAC) are used to adjust the position of a weld torch in directions of bead throat and weaving, respectively. The WAC, which is newly devised in this study, means that arc current in the vicinity of weaving end is more emphasized than that in the center of weaving. The reason of this is because there usually exists much noise in the center of weaving due to abrupt change of arc length in case some empty gaps exist in a fillet joint Variance analysis was performed in order to check the effect of weld parameters on arc current and the WAC. As a result, the relationships between tip-to-workpiece distance and arc current, and between weaving offset and the WAC were established.To check "the validity of the algorithm, seam-tracking experiments were performed ;mder various welding condition. The result of experiments showed a satisfactory tracking performance in the presence of empty gaps in a horizontal fillet joint.et joint.

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References

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