Double wire welding control method

Abstract

The invention provides a double-wire welding control method. In the double-wire welding control method, electric arc interrupt due to generation of electric arc deflection is restrained. The double-wire welding control method includes: repeatedly applying a peak voltage and applying a base voltage taken as a cycle between the consumption electrode and the mother plate, applying a welding current to generate electric arc to form a melting bath, and conveying the filler wire to the melting bath for welding, wherein when the electric arc deflexion generation (time t42) in electric arc is determined based on the ascending of the base voltage the ascend, a current is applied in the same direction to the welding current in the filler wire, to eliminate the electric arc deflexion (time t43). In order to apply the current in the same direction in the welding wire and the filler wire, a binding force is acted to the electric arc deflection due to electric arc deflexion, so as to normalize the electric arc deflection.

Description

technical field [0001] The present invention relates to a twin-wire welding control method for suppressing arc instability caused by arc deflection (magneticarc blow) in a twin-wire welding method in which a consumable electrode is placed between a consumable electrode and a base metal. During this period, by repeatedly applying the peak voltage and applying the base voltage as one cycle, an arc is generated to form a molten pool, and the filler wire is transported into the molten pool for welding. Background technique [0002] (Prior Art 1) As is well known, there is a conventional twin-wire welding method in which an arc is generated between a consumable electrode (hereinafter referred to as a welding wire) and a base metal to form a molten pool, and at the same time, a filler wire is fed to the molten pool and welded (see Patent Document 1). In this twin wire welding method, since the molten metal of the filler wire is added to the molten metal of the welding wire, the a...

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Problems solved by technology

However, since the basic current value of tens of A is generally increased to a large current value of 200A or more, the state of droplet movement becomes temporarily unstable.

As a result, part of the appearance of the weld may deteriorate

[0018] In addition, when the method of prior art 3 described above is applied as an arc deflection countermeasure, it is necessary to specially arrange the front welding wire and the rear welding wire other than the filler wire in the welding torch, so the welding torch structure becomes complicated and expensive.

In addition, since a special power supply that supplies voltage to the front wire and the rear wire is also required, the price becomes higher

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