Horizontal fillet welding method, horizontal fillet welding system, and program

Abstract

The invention provides a horizontal fillet welding method, a horizontal fillet welding system, and a program. The present invention suppresses the occurrence of inferior bead appearance and of weldingdefects in horizontal fillet welding. A welding system that, using the junction at which a standing plate and a bottom plate meet as a welding line, makes an electrode weave centered on the welding line and thereby welds along the welding line. While weaving, the electrode moves forward in a welding advancement direction until a bottom-plate-side weaving edge. When the electrode arrives at the bottom-plate-side weaving edge, the electrode moves backward with respect to the welding advancement direction until a standing-plate-side weaving edge. The electrode repeats this weaving motion on thebottom-plate side and on the standing-plate side.

Description

technical field [0001] The present invention relates to a horizontal fillet welding method, a horizontal fillet welding system and a program. Background technique [0002] When using the consumable electrode type arc welding method for horizontal fillet welding of medium or thick plates (hereinafter referred to as medium and heavy plates), it is necessary to ensure a weld with a large waist height (hereinafter referred to as a large weld waist height) and a wide width. road. In order to ensure a large weld waist height and a wide weld bead, it is necessary to increase the welding current or reduce the welding speed, etc., so that the amount of deposition per unit welding length increases. Among them, when the welding current is fixed and the welding speed is decreased to increase the deposition amount, productivity may be poor and appropriate penetration may not be obtained. On the other hand, when the welding speed is fixed and the welding current is increased to increase...

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Problems solved by technology

[0003] In addition, in order to improve productivity, welding based on high welding speed is usually performed, but as the welding speed increases, the welding current needs to be increased in order to maintain the amount of deposition per unit welding length

However, as the welding current increases, the arc force applied to the molten pool becomes larger, and the molten pool directly under the arc is squeezed out to the rear, and the molten pool may not be supplied to the groove dug by the arc on the vertical plate side. Undercuts remaining as grooves due to the metal, or poor appearance with a convex weld bead after solidification

[0004] In this way, in the case of large weld seam height and high-speed welding in fillet welding, there is a problem that the appearance of the weld bead is poor, or welding defects such as undercut and weld flash occur.

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