The commonly used methods for welding all-pipe fabric air ducts and air ducts are manual welding, referred to as MMA, and metal gas shielded welding, referred to as tungsten inert gas shielded welding, referred to as tungsten inert gas shielded welding, referred to as tungsten inert gas shielded welding , referred to as TIG. Next, the fabric air duct ventilation duct manufacturer will provide you with three methods! Method 1: manual welding. The use is very common, the operation is simple, it is mainly adjusted by people, and the welding seam filler adopts electric welding rod. Manual welding can weld almost all materials, even outdoors, so it has good adaptability. Generally, direct current is used for welding. Welding bars, either titanium welding or sealing welding can be used. Titanium profiles are easier to weld, the welds are beautiful, and the slag removal is easy. But it has the disadvantage that if it is not used for a long time, it needs to be re-baked to prevent the accumulation of moisture. Method 2: metal electrode gas shielded welding method. The electrode belongs to gas shielded welding, also known as arc welding, which is a kind of gas shielded welding. This welding method can be used to weld steel, unalloyed steel, low-alloyed steel and high-alloyed steel, and is widely used. However, its protective gas must be active gas, such as carbon dioxide or mixed gas. The disadvantage is that if welding outdoors, the workpiece cannot be wetted, otherwise the protective effect of the shielding gas will be affected. Method three: tungsten inert gas shielded welding. An arc is generated between the welding wire and the workpiece, so the shielding gas is required to be pure argon, and the welding wire is not charged, so it can be input manually, or by machine, or sometimes not. As for whether to use direct current or alternating current, it depends on the welding material. Inert gas tungsten arc welding is mainly used for welding medium and thin workpieces, with a wide range of materials, including alloy steel, aluminum, magnesium, copper, gray cast iron, nickel, silver, titanium and lead, etc.
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