Welding electrode and device for its manufacture

Abstract

The present invention relates to a welding electrode (1) for use in manual arc-welding operations. The welding electrode comprises a core wire having an arc ignition portion including an arc ignition face, the cross-sectional area of said arc ignition portion being reduced relative to the main cross section of the core wire. The arc ignition portion is formed with at least one recess the mouth of which opens in the longitudinal lateral face of the core wire. The invention likewise concerns a device in the manufacture of welding electrodes for use in manual metallic arc welding operations. The manufacturing process comprises a unit for the manufacture of core wires and a unit for applying on said core wires a material forming slag and a shielding gas during the welding operation. The device has at least one shaping unit formed with at least one slitting means for forming at least one slit in one of the end portions of said core wires. It also has at least one holding means, in which said core wires are arranged to be collected in order to be advanced sequentially past the slitting means.

Description

technical field [0001] The invention relates to a welding electrode for manual metal arc welding operations, said electrode comprising an arc portion having an arc face. The cross section of the arc starting part is reduced relative to the main body cross section of the welding electrode. In addition, the invention relates to a device for manufacturing a welding electrode for manual metal arc welding, said manufacturing process comprising a unit for manufacturing a welding core of the welding electrode and for placing and drying on the electrode welding core to form slag and protection Units for gaseous materials. Background technique [0002] According to the welding operation of most welding methods, high temperatures are required in order to enable the joining of two metal workpieces. According to the oldest method - manual metal arc welding, the heat source is the electric arc, the electric energy of the arc is converted into heat energy during the welding process, and...

AI Technical Summary

Problems solved by technology

This machining requires high precision, which is cost-intensive since the welding core of the welding electrode usually has a diameter of less than 5 mm and the centering of the hole is usually done manually

In this type of cross-sectional reduction, the drilled hole also prevents the coating material from fully penetrating into the hole as a result of the accumulation of air in the hole, the above-mentioned quality for the subsequently formed weld / initial stage of the weld will be is an unfavorable feature