Method for carrying out electrified repair on horizontal aluminum bus

Abstract

The invention provides a method for carrying out electrified repair on a horizontal aluminum bus. The method comprises the following steps that S1, a damaged area of the horizontal aluminum bus is found, and the damaged area is vertically cut off downwards from the top surface of the horizontal aluminum bus to form a to-be-welded junction; S2, a lithium chloride solution is brushed on the surface of the to-be-welded junction; S3, a packaging mold is installed to seal the to-be-welded junction; S4, a small hole in the lower portion of a charging mold is blocked by a blocking piece, and an aluminum bus welding flux is weighed and put into the charging mold; S5, pyrophoric powder is scattered on the surface of the aluminum bus welding flux, a lead is inserted, the lead is ignited to trigger an exothermic reaction, after the blocking piece at the bottom of the charging mold is melted, high-temperature molten metal flows into the packaging mold through the small hole in the bottom of the charging mold, the to-be-welded junction is filled, and after the molten metal is cooled, the packaging mold and the charging mold are disassembled; and S6, after cooling is carried out, redundant parts and welding slag on the metal surface of a welded part are cleaned, the surface is milled, ground, polished and lubricated, and the repaired horizontal aluminum bus is obtained.

Description

Technical field [0001] The present invention belongs to the field of welding material, particularly relates to an aluminum busbar flux, their preparation and use. Background technique [0002] Aluminum and aluminum alloys have low density, high strength, corrosion resistance, good thermal and electrical conductivity, etc., so that it get in the transportation, metallurgy, aerospace, building bridges, electrical and electronics, automotive manufacturing, packaging container, military equipment and other industries more widely used. Damage may occur in the aluminum and aluminum alloy member during use, usually, only the method of manual arc welding and repair. However, in some circumstances, may be faced with no electricity, no air, no case of welding equipment, such as aluminum smelting, in order to increase production of aluminum, an aluminum reduction cell current intensity rise, domestic aluminum cell current intensity has reached 350,000 amperes. Such a large direct current el...

AI Technical Summary

Problems solved by technology

However, since the heat dissipation area of ​​the horizontal busbar is much higher than that of ordinary cathode busbars and column busbars, and its welding depth is relatively shallow, only less than 1 / 10 of other busbars, the existing welding materials and welding technology are used for horizontal welding. The welding of the busbar has defects such as insufficient welding heat, inability to fuse the interface, incomplete separation of the slag liquid, welding delamination, excessively long welding preheating time, high manufacturing cost of the welding mold, and poor wear resistance of the welding metal. The pressure drop of the contact surface is as high as 30-50mv, and the energy loss is serious during operation, which poses a major safety hazard

Images