Abstract
There are two types of manipulations of electrodes in arc welding such as stringer bead and weaving bead. The latter is widely used to reduce the number of weld passes, since it can place much deposited metal with one pass of welding bead. It is considered that the welding operation using weaving bead decreases the welding speed because the welding arc moves right and left while travelling in the direction of weld seam, and that the weld zone would be cooled more slowly than that welded by stringer baed. In this paper, the cooling process of weld zone with weaving bead is quantitatively evaluated by three dimensional finite difference method in the transient temperature field. The effects of weaving bead on the cooling cycle are compared with those by stringer bead. The validity of the numerical approach proposed here is ascertained by executing shielded metal arc welding by an expert worker.
