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Abstract

Sensing and correlating the surface geometrical appearance of weld pool to the weld penetration are prerequisites for gas-metal arc welding (GMAW) process control. This paper focuses on vision-based sensing and determination of the weld pool geometrical appearance during the GMAW process. An experimental system has been developed to measure the weld pool geometry under different GMAW conditions. A special camera system, assisted by laser pulsation and a filter, was integrated with the developed image-processing algorithm to overcome the strong disturbances in GMAW. The shielding gas of 80% Ar + 20% CO₂ was used to make bead-on-plate welds on low-carbon steel Q235 workpieces. The weld pool boundary with real dimensions was obtained for different GMAW conditions. The results provide a good foundation for describing the correlation of the weld pool surface geometry to the penetration.

Keywords

gas-metal arc welding weld pool geometry sensing

References

Buness

What is new in welding 1995–production methods and equipment. Weld. Cutting, 1996, 64(5), E102–E114.

Ushio

The state-of the-art and subjects of arc welding automation in various industries in Japan. IIW Document XII-1359-94, International Institute of Welding, 1994.

Song

J. B.

Hartdt

D. E.

Simultaneous control of bead width and depth geometry in gas metal arc welding. In Proceedings of the Conference on International Trends in Welding Science and Technology, 1999, pp. 921–926 (American Society for Metals, Materials Park, Ohio).

Richardson

R. W.

Coaxial arc weld pool viewing for process monitoring and control. Weld. J., 1984, 63(3), 43–50.

Zhang

Y. M.

Determining joint penetration in GTAW with vision sensing of weld face geometry. Weld. J., 1993, 72(10), 463s–469s.

Kovacevic

Zhang

Y. M.

Lin

Monitoring of weld joint penetration based on weld pool geometrical appearance. Weld. J., 1996, 75(10), 317s–329s.

Gao

J. Q.

C. S.

Extracting weld penetration information in tungsten-inert gas arc welding. Proc. Instn Mech. Engrs, Part B: J. Engineering Manufacture, 2002, 216(B2), 207–214.

C. S.

Gao

J. Q.

Liu

X. F.

Zhao

Y. H.

Vision-based measurement of weld pool geometry in gas tungsten arc welding. Proc. Instn Mech. Engrs, Part B: J. Engineering Manufacture, 2003, 217(B6), 879–882.

Hoffman

Real-time imaging for process control. Advd Mater. Processes, 1991, 140(3), 37–43.

10.

Tsai

N. S.

Eagar

T. W.

Distribution of the heat and current fluxes in gas tungsten arcs. Metall. Trans. B, 1985, 16, 841–846.

11.

Giedt

W. H.

GTW welding efficiency: Calorimetric and temperature field measurements. Weld. J., 1989, 68(1), 28s–32s.

Sensing weld pool geometrical appearance in gas—metal arc welding

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