Current control method for arc welding

Abstract

The invention belongs to the technical field of electric arc welding, and specifically discloses a current control method for arc welding. A welding gun used in the control method comprises a handle,wherein one end of the handle is connected to a welding tube; the other end of the handle is connected to a welding machine and a gas cylinder with protective gas through a pipeline; a gas path for blowing out protective gas is arranged in the welding tube, and a welding wire is arranged in the gas path in a penetrating mode; one end, away from the handle, of the welding tube is connected to a gunhead; the periphery of the gun head is fixedly connected to a funnel shaped protective cover; and the longitudinal section of the protective cover is transited towards a direction away from the gun head. The through the funnel-shaped protective cover, heat loss of a welded part is reduced, so that the temperature of a weld pool at a welding seam is increased, welding current for keeping the temperature of the weld pool is reduced, the service life of a welding machine current control element is prolonged, and consumption of electric energy is reduced.

Description

technical field [0001] The invention belongs to the technical field of arc welding, in particular to an arc welding current control method. Background technique [0002] Arc welding refers to the use of an arc as a heat source, using the physical phenomenon of air discharge, to convert electrical energy into thermal and mechanical energy required for welding, so as to achieve the purpose of connecting metals. The main methods are electrode arc welding, submerged arc welding, gas shielded welding, etc. It is the most widely used and most important fusion welding method, accounting for more than 60% of the total welding production. [0003] Electrode arc welding is the most widely used welding method in industrial production. Its principle is to use the heat generated by arc discharge (commonly known as arc combustion) to melt the electrode and the workpiece and form a weld after condensation to obtain a firm joint. process. [0004] In an arc welder, when the generation of ...

AI Technical Summary

Problems solved by technology

[0006] In order to make up for the deficiencies of the existing technology and solve the problem that when the generation of sputtering increases, the vaporized metal adheres to the base metal, which reduces the welding quality, and also, when the generation of sputtering exceeds the permissible frequency, it is necessary to correct the operation of the welded part , if such a correction is not possible, the weldment with such a welded portion must be discarded, which reduces the efficiency of the welding operation, and greatly aggravates the problem of price-performance ratio. The present invention proposes an arc welding Current Control Method

Images