For us, it is time to learn about fabric air duct ventilation pipe welding. The following will introduce some new knowledge, and then let us have a deeper understanding of fabric air duct ventilation pipe welding. Welded varieties of pipe ventilation pipes. The commonly used methods for the welding of fabric air duct ventilation pipes are manual welding, referred to as MMA, as well as metal gas maintenance welding and tungsten inert gas maintenance welding, metal gas maintenance welding for short MIG/MAG, tungsten inert gas maintenance welding for short TIG. Method 1: Manual welding is widely used and easy to operate. It is mainly adjusted by people, and the welding seam filling material is electric welding rod. Craft welding can weld almost all materials, even outdoors, so it has good adaptability. Generally, direct current is used for welding. The electrode can be either a titanium electrode or a non-ferrous one. Titanium electrodes are easier to weld, the welds are beautiful, and the slag is easy to remove. But the disadvantage is that if it is not used for a long time, it is necessary to re-bake it to prevent the accumulation of moisture. Method 2: Metal electrode gas maintenance welding It belongs to gas maintenance welding, and it is also a kind of arc welding. Under the maintenance gas, the electrode is melted by the arc. Metal pole gas maintenance welding can be used for materials such as steel, unalloyed steel, low-alloyed steel and high-alloyed steel, and is widely used. But one thing, its maintenance gas must be active gas, such as carbon dioxide or mixed gas. The disadvantage is that if welding is performed outdoors, the workpiece cannot be damp, otherwise the maintenance effect of the maintenance gas will be affected. Method 3: The tungsten inert gas maintenance welding arc is generated between the tungsten electric welding wire and the workpiece, so the maintenance gas is required to be pure argon, and the welding wire is not charged, so it can be fed manually or by machine. Sometimes it can not be sent. Then whether it uses direct current or alternating current depends on the welding material. Tungsten inert gas maintenance welding is primarily used for welding thin and medium thickness workpieces in a wide range of materials, including alloy steel, aluminum, magnesium, copper, gray cast iron, nickel, silver, titanium, and lead.
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