A kind of preparation method of high-quality aluminum alloy welding wire

Abstract

A method for preparing high-quality aluminum alloy welding wire, which is characterized in that it includes the following steps in sequence: ① drawing, drawing the aluminum alloy welding wire for 8 to 10 passes, and the shrinkage rate of each drawing is 16 to 18%, Moreover, the deformation of each pass is consistent; ②Sizing, passing through the sizing mold, the mold tolerance is ±0.002mm; ③Scraping, passing through the scraping mold, the mold tolerance is ±0.002mm; the scraping rate is 6~15m / s ; ④ Smooth rolling, through the polycrystalline mold, the mold tolerance is ± 0.002mm; ⑤ Cleaning, ultrasonic cleaning through an ultrasonic water tank; ⑥ Drying, drying by hot air. Compared with the prior art, the present invention has the advantages of: in the production process, by controlling the parameters such as the amount of drawing deformation, the various steps cooperate to effectively remove the scratch layer, oxide layer, fatigue layer and Water-absorbing layer, the aluminum alloy welding wire produced has the characteristics of smooth surface, precise size and roundness control, reasonable stiffness and deflection control, and is especially suitable for automatic inert gas shielded welding process (MIG) welding.

Description

technical field [0001] The invention relates to a preparation method of aluminum alloy welding wire, belonging to the technical field of welding materials. Background technique [0002] With the extensive application of aluminum alloy and high-efficiency automatic welding technology in high-end military and civilian lightweight equipment, the quality and performance requirements for aluminum alloy welding materials are getting higher and higher. The performance and quality of aluminum alloy welding wire depends not only on the smelting and purification technology of aluminum alloy melt, but also on the forming process and surface treatment process of aluminum alloy welding wire. [0003] The traditional aluminum alloy welding wire preparation process is to remove the lubricant (grease) and other dirt on the surface of the welding wire after drawing the thick raw material to the finished product size. In the past, chemical (acid-base) cleaning or chemical polishing was used. ...

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Problems solved by technology

However, such methods form dents, oxides, etc. on the surface of the welding wire, making it difficult to obtain a high-quality surface, which affects automatic welding production and joint welding quality

[0004] In order to ensure the surface quality of the welding wire and reduce defects such as pores in the welding seam during the welding process, the researchers proposed to use mechanical scraping to remove the thicker oxide film and scratches on the surface of the welding wire during the rolling or extrusion process. Avoid the defect that chemical method brings, as application number is 200610019430.3 Chinese invention patent application publication " the production technology of bright welding wire of aluminum and aluminum alloy " (publication number: CN101092011A), mention in this application to carry out mechanically to the surface with finishing polishing. Finishing, another example is that the application number is 200910300504.4 Chinese invention patent application disclosure "a kind of aluminum alloy welding wire surface scraping method and equipment" (publication number is CN101513699A), in this application, carry out scraping in two times, that is, rough scraping and fine scraping, although It has achieved a certain effect, but the disclosure of technical content is not sufficient, and because the quality of aluminum alloy welding wire requires good cooperation and support in every link, it is still difficult to guarantee the quality of aluminum alloy welding wire if only focusing on one aspect of the process

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