Method 1: Fabric air duct welding Air duct hand-made welding is widely used, and the actual operation is very easy. It is mainly adjusted by people, and the filling material for welding is fabric air duct electrode. Handmade welding can basically weld all raw materials, even outdoors, so it has very good adaptability. Generally, alternating current is used for welding. Fabric duct electrodes can be either titanium-type electrodes or wire-tight electrodes. Titanium type welding wire is relatively easy to weld, the welding is beautiful, and the welding penetration is very easy to remove. But the disadvantage is that if it is not used for a long time, it must be baked again to prevent the accumulation of moisture. Method 2: Gas shielded welding of metal materials All-welded air ducts belong to gas shielded welding, which is also a kind of arc welding, in which the welding wire is melted by the electric isolation under the maintenance gas. Metal material gas shielded welding can be used for such raw materials as steel, non-carbon steel, high alloy steel and its high aluminum alloy, and it is widely used. But one thing, its maintenance gas must be a specific gas, such as carbon dioxide or mixed gas. The disadvantage is that if welding is carried out outdoors, the product workpiece cannot return to moisture, otherwise it will harm the actual effect of the maintenance gas. Method 3: The tungsten arc welding electrode is caused between the tungsten arc welding wire and the product workpiece, so the maintenance gas is specified as pure argon, and the electrode is not electrified by induction, so it can be fed manually or The device feeds, and sometimes it doesn't. Then whether it applies alternating current or alternating current depends on the welding raw material. Plastic gas tungsten arc welding is mainly used to weld thin and medium-thick product workpieces. The range of materials is very wide, including carbon steel, aluminum, magnesium, copper, gray cast iron, nickel, silver, titanium and lead.
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