Sensing metal inert gas process by measuring wire feedrate and current

Abstract

Current and wire feedrate are coupled in a complicated manner in the metal inert gas (MIG) welding process. To investigate this interaction, a model of the melting process was established. The model is based on the physical properties of the wire and the energy flow in the MIG process. This model was used to study the influence of the different types of energy transfer to the wire. The contact resistance, stickout length, current, and anodic heat all influence the melting rate of the wire. This knowledge could be used to control the MIG process. In the present case, measurements of the current and wire feedrate can be taken to obtain information on the physical status of the process. Control of the process is possible with this information.

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References

Halmoy

: Proc. Conf. ‘Arc physics and weld pool behaviour’, London, UK, May 1979, TWI, 49–57.

Waszink

J. H.

and van den Heuvel

G. J. P. M.

: Weld. J., 1982, 61, 269s–282s.

Huismann

: ‘Analyse eines Schmelzschweissprozesses mit abschmelzender Elektrode’, Habilitationsschrift, 1998.

van den Heuvel

G. J. P. M.

.: Schweissen Schneiden, 1978, 30, 165–171.

Huismann

and Hoffmeister

: Proc. Conf. OMAE 1996, Florence, Italy, June 1996, ASME, Vol. 3, 133–140.

Huismann

and Hoffmeister

: Proc. 5th Int. Conf. on Trends in Welding Research, Pine Mountain, GA, USA, June 1998, ASM International, 295–300.