Transactions of the Korean Society of Machine Tool Engineers (한국공작기계학회논문집)

The Korean Society of Manufacturing Technology Engineers (한국생산제조학회)
권호 표지

A Study on Sensitivity Analysis for Selecting the Process Parameters in GMA Welding Processes

GMA 용접공정에서 공정변수 선정을 위한 민감도 분석에 관한 연구

  • 김일수 (목포대학교 기계선박해양공학부) ;
  • 심지연 (한국생산기술연구원 정밀정합팀) ;
  • 김인주 (한국생산기술연구원 전북연구센터) ;
  • 김학형 (목포대학교 기계공학과)
  • Published : 2008.10.15
Download PDF
⟨ Previous Next ⟩

Abstract

As the quality of a weld feint is strongly influenced by process parameters during the welding process, an intelligent algorithms that can predict the bead geometry and shape to accomplish the desired mechanical properties of the weldment should be developed. This paper focuses on the development of mathematical models fur the selection of process parameters and the prediction of bead geometry(bead width, bead height and penetration) in robotic GMA(Gas Metal Arc) welding. Factorial design can be employed as a guide for optimization of process parameters. Three factors were incorporated into the factorial model: arc current, welding voltage and welding speed. A sensitivity analysis has been conducted and compared the relative impact of three process parameters on bead geometry in order to verify the measurement errors on the values of the uncertainty in estimated parameters. The results obtained show that developed mathematical models can be applied to estimate the effectiveness of process parameters for a given bead geometry, and a change of process parameters affects the bead width and bead height more strongly than penetration relatively.

Keywords

References

  1. Jones, S. B., 1976, "Process tolerance in submerged arc welding: Initial report," The Welding Institute Research Report, Vol. 1
  2. Chandel, R. S. and Bala, S. R., 1986, "Effect of welding parameters and groove angle on the soundness of root beads deposited by the SAW process," Proceedings of an International Conference on Trends in Welding Research, May, pp. 379-385
  3. Shinoda, T. and Doherty, J., 1978, "The relationship between arc welding parameters and weld bead geometry: A literature survey," The Welding Institute Research Report, Vol. 74
  4. Roberts, D. K. and Wells, A. A., 1954, "Fusion welding of aluminium alloys," British Welding Journal, Vol. 12, pp. 553-559
  5. Christensen, N., Davies, V. de L., and Gundsen, K., 1965, "Distribution of temperatures in arc welding," British Welding Journal, Vol. 23, pp. 54-75
  6. Friedman, E. and Glickstein, S. S., 1976, "An investigation of the thermal response of stationary gas tungsten arc welds," Welding Journal, Vol. 55, No. 12, pp. 408-420
  7. Chandel, R. S., 1988, "Mathematical modeling of gas metal arc weld features," Proceedings of the Fourth International Conference on Modeling of Casting and Welding Processes, April 10, pp. 9-12
  8. Doumanidis, G., Hale, M., and Hart, D. E., 1986, "Multi-variable control of arc welding processes," Proceedings of an International Conference on Trends in Welding Research, Gatlinburg, USA, 18-22 May, pp. 449-457
  9. Rozvany, G. N. I. and Z. Mroz, 1977, "Column design: optimization of support conditions and segmentation," Journal of Structural Mechanics, Vol. 5, No. 3, pp. 279-290 https://doi.org/10.1080/03601217708907315
  10. Chuang, C. H. and Hou, G. J., 1999, "Eigen value sensitivity analysis of planar frames with variable joint and support locations," AIAA Journal, Vol. 30, No. 2, pp. 2138-2147 https://doi.org/10.2514/3.11192
  11. Choi, B., Park, Y. H., and Choi, K. K., 2000, "Shape design optimization of joining mechanism using doubly curved shell," International Journal of Computers and Structures, Vol. 77, pp. 495-507 https://doi.org/10.1016/S0045-7949(99)00234-5
  12. Yoon, S. H., Kim, C. H., and Kim, J. Y., 2006, "The Performance Comparison of Classifier Algorithm for Pattern Recognition of Welding Flaws," Transactions of the Korean Society of Machine Tool Engineers, Vol. 15, No. 3, pp. 39-44
  13. Lee, J. I. and Koh, B. K., 2007, "A Study on Real-time Control of Bead Height and Joint Tracking," Transactions of the Korean Society of Machine Tool Engineers, Vol. 16, No. 6, pp. 71-78
  14. Kim, H. G., Kim, Y. S., Yang, S. M., and Nah, S. C., 2005, "A Study on Unit Cell Design for the Performance Enhancement in PEMFC System," Transactions of the Korean Society of Machine Tool Engineers, Vol. 14, No. 4, pp. 104-109
  15. Kim, C. H., Yu, H. Y., Hong, S. H., and Kim, J. Y., 2007, "A Study on Construction of Automatic Inspection System for Welding Flaws," Transactions of the Korean Society of Machine Tool Engineers, Vol. 16, No. 6, pp. 37-42
  16. Kim, J. Y., Hong, S. J., Lee, K. T., Kim, B. H., Kim, H. C., and Kim, Y. J., 2000, "A Study on the Application of Digital Signal Processing for Pattern Recognition of Microdefects," Transactions of the Korean Society of Machine Tool Engineers, Vol. 9, No. 1, pp. 119-127