Consumable electrode type arc welding method and device therefor

Abstract

The present invention provides simple and inexpensive welding method and apparatus adapted to extremely reduce spatters occurring and scattering during a welding operation, even in a welding operation carried out at not lower than substantially 2 m / min. The consumable electrode type arc welding apparatus according to the present invention is provided with a welding power source 23 for controlling a welding current and a welding voltage, a unit 25 for feeding a welding wire to a base metal, a unit 26 for giving the welding wire feeding unit an instruction to feed the welding wire, on the basis of a signal from a short-circuiting / short-circuiting cancellation detector 29, a welding condition setter 24 for setting the welding condition, a welding speed setter 27, a unit 28 for moving a welding torch in accordance with the welding speed, and the short-circuiting / short-circuiting cancellation detector 29 for detecting short-circuiting or short-circuiting cancellation.

Description

technical field [0001] The present invention relates to a melting electrode arc welding device. Background technique [0002] Conventionally, when welding is performed by gas shielded arc welding or the like, a welding apparatus as shown in FIG. 1 is used. In the figure, 1 is the base metal to be welded, 2 is the welding power supply, 3 is the welding torch, 4 is the tip of the welding torch, 5 is the welding wire, 6 is the welding arc, 11 is the welding wire feeding drum, and 10 is the welding wire feeding The driving motor for the drum, 9 is a winding wire reel, 7 is a fixed arm of a simple trolley (not shown) that fixes the welding torch 3, or the arm of a welding robot, and 8 is used to supply the welding wire 5 to the welding machine. Conduit cable for mouth 3. [0003] In the case of welding by such a welding device, at first, if an appropriate voltage is supplied from the welding power source 2, a welding arc 6 is generated between the tip of the welding wire 5 and ...

AI Technical Summary

Problems solved by technology

[0008] (1) Since the weld droplet 22 moving from the tip (tip) of the welding wire 5 to the base material 1 becomes a large particle, there is a case where the weld droplet 22 moves to a place other than the melting pool and becomes sputtering of a large particle

[0009] (2) Since the generated spatter becomes larger, it takes time to remove the sputter attached to the base material 1, and the deposition efficiency from the welding wire 5 to the welding place is reduced, and the welding efficiency is reduced.

However, since the welding current is large, that is, from 300A to 400A in welding above about 2m / min, the melting speed of the welding wire is accelerated, and a large number of welding droplets are generated, and there is a problem of arc instability

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