Effect of Short Circuit Time Ratio and Current Control Pattern on Spatter Generation in $CO_2$ Welding

$CO_2$용접의 스패터 발생에 미치는 단락시간비 및 단락전류 파형제어의 영향

  • 조상명 (부경대학교 재료공학부 생산가공공학)
  • Published : 2003.02.01

Abstract

The object of this study is to examine the effect of short circuit time ratio (SCTR) and current rise delay time (Td) on the spatter generation at low and medium current range in $CO_2$ welding. The spatter was evaluated by the weight generated in the welding of bead-on-plate for 30 seconds (3 times). Td was varied by order of 0, 0.4, 0.8 and 1.2 msec. At each Td, the short circuit time ratio was varied by the output voltage of the welding power source. In the low current range, it was found that the optimum SCTR was 20~25%, and the minimum spatter generation weight was obtained in the case of Td=0.4msec and SCTR=22% even though the remarkable difference was not showed by the application of Td. In the medium current range, it was confirmed that the arc was stable though the SCTR was increased from 20% to 40% by the control of current wave. Spatter generation weight depended on the variation of Td, and the lowest value of spatter generation weight occurred at Td=0.8~1.2msec.

Keywords

References

  1. Quarterly Journal of the Japan Welding Society v.6 no.2 Waveform control method in CO₂gas shielded arc welding T. Mita https://doi.org/10.2207/qjjws.6.209
  2. J. of Japan Weld. Soc. v.64 no.6 Recent advances in welding power systems for automated welding H. Yamamoto
  3. Journal of KWS v.15 no.6 A Study on Determing Arc Stability Using Weight of Spatter S. K. Kang;H. S. Moon;S. J. Na
  4. Journal of Korean Welding Society v.17 no.5 Effect of Delay Time Control on the Spatter Generation in CO₂Welding C. H. Lee;H. J. Kim;B. Y. Kang
  5. Journal of KWS v.16 no.3 Concept of Waveform Control for the Reduction of CO₂Welding Spatter H. J. Kim;Y. S. Kim
  6. Journal of KWS v.17 no.4 The Characteristics of Power Source on the Spatter Generation Rate in Arc Welding Process H. J. Kim;C. H. Lee
  7. Journal of KWS v.18 no.4 Trends of Monitoring Technology for the Arc Welding Quality Evaluation S. M. Cho;K. W. Choi;K. W. Lee
  8. Journal of KOSTET v.4 no.1 Effect of Welding Current and Voltage on the Metal Transfer Mode in GMAW D. S. Oh;K. W. Lee;S. M. Cho
  9. Welding Production no.3 Reducing the spatter of liquid metal in CO₂welding by means of optimisation of the welding parameters Popkov, A.(et al.)