The Paton Welding Journal, 2006, №03

2006 №03 (02)

2006 №03 (04)

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The Paton Welding Journal, 2006, #3, 11-15 pages

Mathematical model for MAG welding in a manufacturing environment

T. Ohji, F. Miyasaka, T. Yamamoto, Y. Tsuji

Osaka University, Osaka, Japan

Abstract
A feasibility study has been conducted to determine if mathematical models can be used for the numerical simulation of MAG welding in a manufacturing environment. In the present work, a 3D non-stationary thermal model for the welding is developed. The transient temperature distribution on the base metal is numerically analyzed to estimate the molten pool size by using a finite difference model based on the heat flow equation, and the theoretical configuration of molten pool is calculated, taking into account of the balance of gravity, surface tension and arc pressure. The developed model has been applied to the simulation of various welding processes, such as multi-pass welding, and fillet and butt welding with torch weaving. As the result, it is made clear that the model is shown to be capable of predicting the MAG welding and its weld profile in the manufacturing environment.
Keywords: arc welding, mathematical model, thermal model, temperature distribution, molten pool size, process prediction, manufacturing

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Suggested Citation

T. Ohji, F. Miyasaka, T. Yamamoto, Y. Tsuji (2006) Mathematical model for MAG welding in a manufacturing environment. The Paton Welding J., 03, 11-15.

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