Copper clad welding rod and manufacturing method thereof

Abstract

The invention discloses a copper clad welding rod and a manufacturing method thereof, wherein the copper clad welding rod comprises a metal core and a welding flux covering; the metal core comprises a working part and a holding part that are fixedly connected with each other; the welding flux covering is covered outside the working part; the working part is an iron alloy wire; and the holding part is a copper-plated aluminum wire; the length ratio between the holding part and the working part is 1:7-8; and the welding flux covering comprises the following components: 20-25 parts by weight of albite, 10-12 parts by weight of potassium carbonate, 6-10 parts by weight of calcium carbonate, 20-25 parts by weight of sodium silicate, 1-3 parts by weight of nanometer titanium dioxide, 2-3 parts by weight of nanometer ferric oxide, 1-1.5 parts by weight of manganese dioxide, 0.5-1 part by weight of rare earth lanthanum, 8-12 parts by weight of kaolin, and 6-10 parts by weight of Zuoyuntu (a raw material for electroceramics originating in Zuoyun County, Shanxi Province, China). The method comprises the steps of frictionally welding the working part with the holding part, and then coating the welding flux covering. By employing the contact interface design of the working part and the holding part of the welding rod, and utilizing the different characteristics of the metal and the welding flux covering, automatically releasing the welding rod head is achieved when the welding rod is about to run out, thereby thoroughly avoiding the residual of the welding rod head.

Description

technical field [0001] The invention relates to an electrode for arc welding, in particular to a copper-clad electrode and a manufacturing method thereof. Background technique [0002] Electrode arc welding is the most widely used welding method in industrial production. It belongs to gas-slag combined protection metal arc welding. Its principle is to use the heat generated by arc discharge to melt the electrode and the workpiece and form a weld after condensation , so as to obtain a firm bonding interface between the workpieces. It has the advantages of good flexibility, convenient operation, low assembly requirements before welding, and simple equipment. Therefore, although automatic welding equipment such as gas shielded welding machines and welding robots have been widely used in steel structure manufacturing, traditional arc welding with electrodes is still required for manual welding in some complex welds. [0003] The tool usually used in manual arc welding is weldi...

AI Technical Summary

Problems solved by technology

[0004] In complex large-scale steel structures such as cranes, offshore drilling platforms and ships, the special position of some welds makes their welding and inspection very difficult

If a concealed weld has just been completed when the working part of the electrode burns out, the welder may release the welding tongs directly, causing the electrode tip to remain and solidify at the end of the weld, and there is a risk that the electrode tip will fall off and get stuck in the mechanical device