Application of welding science to welding engineering: A lumped parameter gas metal arc welding dynamic process model
- Lockheed Martin Idaho Technologies, Idaho Falls, ID (United States)
We develop a model of the depth of penetration of the weld pool in gas metal arc welding (GMAW) which demonstrates interaction between the arc, filler wire and weld pool. This model is motivated by the observations of Essers and Walter which suggest a relationship between droplet momentum and penetration depth. A model of gas metal arc welding was augmented to include an improved model of mass transfer and a simple model of accelerating droplets in a plasma jet to obtain the mass and momentum of impinging droplets. The force of the droplets and depth of penetration is correlated by a dimensionless linear relation used to predict weld pool depth for a range of values of arc power and contact tip to workpiece distance. Model accuracy is examined by comparing theoretical predictions and experimental measurements of the pool depth obtained from bead on plate welds of carbon steel in an argon rich shielding gas. Moreover, theoretical predictions of pool depth are compared to the results obtained from the heat conduction model due to Christensen et al. which suggest that in some cases the momentum of impinging droplets is a better indicator of the depth of the weld pool and the presence of a deep, narrow penetration.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- DOE Contract Number:
- AC07-94ID13223
- OSTI ID:
- 569663
- Report Number(s):
- CONF-9705121-; ON: DE98000902; TRN: 98:000865-0020
- Resource Relation:
- Conference: 15. symposium on energy engineering sciences, Argonne, IL (United States), 14-16 May 1997; Other Information: PBD: 1997; Related Information: Is Part Of Proceedings of the fifteenth symposium on energy engineering sciences; PB: 285 p.
- Country of Publication:
- United States
- Language:
- English
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