Preparation and precautions for aluminum profiles before welding

In recent years, with the rapid advancement of large-scale infrastructure investment and industrialization in China, aluminum profiles have become an important application material in the fields of construction and machinery industries, and their production and consumption in the entire industry have grown rapidly. China has also become the world’s largest aluminum production base and consumer market. Aluminum industry analysis and research report shows that after nearly 10 years of rapid growth, China’s aluminum industry has entered a new stage of development and demonstrated Many new development trends. The following describes the preparation and precautions before aluminum welding:

Welding of aluminum tubes 1 Welding characteristics: Aluminum and aluminum alloys have characteristics of high thermal conductivity, large heat capacity, large linear expansion coefficient, low melting point, and low high temperature strength. It is difficult to weld, and certain measures should be taken to ensure welding quality. 2 The cleaning of pipe fittings and welding wire, the surface of the wire within 50mm of both sides of the wire and breakage is cleaned with acetone, the surface oxide film is brushed with a stainless steel wire brush to expose the metallic luster, and the cleaned break must be welded within 2 hours. The wire is placed in an unused cartridge and must be used within 8 hours or it will be reprocessed. (3) Tungsten rods are used for tungsten rods, and the blunt quality of argon is not less than 99.96%, and the water content should not exceed 50 mg/m3.4 The ambient temperature should not be lower than 5°C, otherwise it should be preheated to 100-200°C for welding. Relative humidity control.

If you want to weld aluminum at home or in a workshop, first of all we need to clarify the following things that have been misunderstood by the public: 1. You need at least a $4,000 worth welder and superb welding skill to weld aluminum; 2. No Need to practice to complete the welding operation with good results; 3. You need to buy an expensive welding torch suitable for aluminum welding.

The fact is that a compact, compact MIG welder can also perform temporary aluminum welding operations after training, using suitable welding equipment, and setting the correct parameters. You will be able to use MIG welders to complete all kinds of material welding in your home, such as barbecue grills, backyard storage rooms, docks, and even decorative parts. Even home welding enthusiasts who frequently weld steel will find it a great challenge to weld aluminum. The reason is: aluminum wire is very soft and wire feeding is quite difficult. In addition, wire diameters and welder settings typically used for steel may not be suitable for welding aluminum.

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