Study on heat source model in twin-arc GMAW with a common weld pool

作者：Zhao, Pengcheng^*; Wang, Lulu; Liu, Chunting; Huang, Shisheng

来源：China Welding, 2009, 18(3): 7-11.

• Arc shape
• Cross section
• Distribution of metal
• Droplet transfer
• Heat flux distributions
• Heat input
• Heat source models
• Mild steel plate
• Top surface
• Weld bead
• Weld pool

The heat input from arcs to weld pool in twin-arc gas metal arc welding (GMAW) with a common weld pool is investigated by high-speed photography. The characteristics of arc shapes and droplet transfer are studied and then the models for heat flux distribution on top surface of weld pool and enthalpy distribution of metal droplets transferred into weld pool are established. By using the model, 3-D geometries of weld pools in twin-arc GMAW with a common weld pool are predicted. Corresponding welding experiments on mild steel plates are carried out and the results indicate that the predicted shape of weld bead on cross section shows good agreement with measured one.

• 出版日期2009-9
• 单位华南理工大学