Low-loss aluminum welding wire cold extrusion technology

Abstract

The invention discloses a low-loss aluminum welding wire cold extrusion technology. According to the low-loss aluminum welding wire cold extrusion technology, a blank aluminum rod is placed in a heating furnace to be heated and extruded to be aluminum wires of 6-8 mm; the aluminum wires are annealed, a wire drawing machine conducts wire drawing on the aluminum wires for 2-5 times until the diameter of the wires is 3-5 mm; cleaning is conducted, according to the mass concentration of a cleaning solution, the ratio between hydrofluoric acid and water is 40-60 kg / 1000 kg, the aluminum wires are dipped for 20-120 s and then taken out, and the aluminum wires are flushed with fresh water and aired; secondary annealing is conducted, wherein the procedure of secondary annealing is identical with that of the initial annealing; secondary drawing is conducted on the aluminum wires until the diameter of the wires is 2-2.5 mm; the aluminum wires with the diameter being 2-2.5 mm are oxidized, wherein sulfuric acid, phosphoric acid and nitric acid are placed in an oxidation tank according to the ratio, after the mixture is evenly stirred and heated to the temperature of 90 DEG C or over, the aluminum wires are arranged in the oxidation tank for 30-120 S; the aluminum wires are fished out and washed, the aluminum wires are placed in another acid tank for 30-120, the aluminum wires are fished out and washed, and the aluminum wires are dried on a drying machine. By the adoption of the technology of conducting hot extrusion firstly and then conducting cold machining wire drawing, compared with like products, the manufactured aluminum welding wires is remarkably larger in density, loss of the product can be reduced in use, under the identical-area welding, the loss can be reduced by 10% than the like products, and cost can be greatly reduced.

Description

technical field [0001] The invention relates to a processing method of aluminum welding wire, in particular to a low-loss aluminum welding wire cold extrusion process. Background technique [0002] Aluminum welding wire is also called aluminum flux-cored welding wire, so it is named after this kind of welding wire can weld aluminum and aluminum. It is different from ordinary aluminum welding wire that needs to be welded with argon arc welding machine, and is also different from aluminum-silicon welding wire 4047 that needs to be welded with flux, but can be directly brazed and welded only by flame or induction (because it comes with flux, so no need plus flux). The tensile and shear strength of the workpiece welded by this welding wire (the firmness of the joint is not lower than that of the base material), the electrical conductivity, and the corrosion resistance are all good, and the quality is stable. Compared with welding with aluminum welding wire using argon arc weld...

AI Technical Summary

Problems solved by technology

In addition, the aluminum alloy has no color change during the heating process, and it is difficult to judge the temperature, requiring the operator to have a high technical level and skilled operation skills