How To Weld Aluminum?Almost all welding methods can be used to weld aluminum and aluminum alloys, but aluminum and aluminum alloys have different adaptability to various welding methods, and each welding method has its own application. Gas welding and electrode arc welding methods are simple in equipment and easy to operate. Gas welding can be used for repair welding of aluminum sheets and castings that do not require high welding quality. Electrode arc welding can be used for repair welding of aluminum alloy castings. The inert gas shielded welding (TIG or MIG) method is the most widely used method for welding aluminum and aluminum alloys. Aluminum and aluminum alloy sheets can be welded with tungsten AC argon arc welding or tungsten pulse argon arc welding. Aluminum and aluminum alloy thick plates can use tungsten helium arc welding, argon-helium mixed gas tungsten arc welding, gas metal arc welding, and pulse gas metal arc welding. Gas metal arc welding, pulsed gas arc welding are more and more widely used (argon or argon/helium mixture)The welding performance of aluminum profiles is good. For some aluminum profile products that are not connected with corners, such as aluminum alloy trays and special frame products, only welding can be used to connect each profile. What are the welding methods of aluminum profiles? Let’s find out today
1. TIG welding
This is the most common welding method, and we often see traces of argon arc welding on other metal materials. TIG welding is also divided into tungsten argon arc welding and melting electrode argon arc welding. Thin materials generally use tungsten argon arc welding, and thick materials are suitable for melting electrode argon arc welding.
2. Spot Welding
Spot welding, as the name implies, is to form one by one welding spot between the welding materials. Spot welding has relatively high requirements on the welding machine and requires instantaneous high temperature heating. Before industries welding, it is necessary to remove all impurities such as dust, grease, layer, oxide film on the surface of the aluminum profile. After the solder joint is solidified, the electrode pressure should be maintained for a period of time. If the electrode pressure is maintained for a short time, defects such as bubbles and cracks are prone to occur.
3. A-TIG Welding
A-TIG welding can greatly improve the penetration depth of aluminum profile welds, reduce welding deformation, and improve yield, and has a wide range of application prospects.
4. Friction Stir Welding
Friction stir welding, referred to as FSW, is a solid-state joining technology proposed by the British Welding Institute in 1991 for the welding of low melting point alloy materials. Like conventional friction welding, friction stir welding also uses friction heat as a heat source. The difference is that friction stir welding uses a stirring column to penetrate into the joint of the workpiece, and the stirring column tells the rotation to rub with the welding workpiece at high speed, so that the stirring part is The material is heated and softened to complete the welding. The above are the main four welding methods of prototype aluminum extrusions profiles. At present, argon arc welding is still the mainstream welding method.
The Welding Robot Welding Process Of Aluminum
What operation procedures are required for welding robots to weld aluminum? In the welding process of aluminum, it is necessary to clean up before welding, stabilize the welding process, and improve the process after welding. According to a reasonable operation process, the role of the welding robot can be improved. Xiaobian will show you the operation process of welding aluminum. Aluminum materials are widely used in aerospace, automobile manufacturing, shipbuilding, electronic engineering and other fields, which also poses challenges to the welding of aluminum materials. In order to reduce defects in the welding process, it is necessary to follow a reasonable operation process.
Preparation Before Welding
In order to reduce the residues in the welding process, it is necessary to clean the aluminum material in advance to remove the oxide film and oily impurities on the surface of the welding port and the welding wire of the workpiece. During the welding process, a high temperature environment will be generated. When the aluminum material is in a liquid state when heated The fluidity is high, which requires the use of fixtures or jig to clamp the custom aluminum parts to reduce the deformation of the workpiece. According to the specifications of the welding workpiece, it is determined whether pre-welding preheating is required. Generally, preheating is not required for thin and small aluminum parts. When the thickness is 10 mm to 15 mm, pre-welding preheating can be performed. Preheating can reduce the deformation and Reduce defects such as pores.
In order to stabilize the welding work, it is necessary to program in a reasonable order and debug according to the workpiece to be welded. When programming the arc welding robot, a reasonable welding sequence must be selected. Generally, it is formulated to reduce the welding deformation and the length of the welding torch walking path. welding sequence. The operator switches on and off the machine according to the correct process. The welding robot has stable performance in the process of welding aluminum, which improves the welding efficiency while stabilizing the welding quality and improving the production efficiency.
Finished After Welding
The residual flux and welding slag left in the weld and nearby after welding will not only affect the subsequent work, but also destroy the passivation film on the surface of the aluminum material, and sometimes corrode the custom aluminum machining parts. The robot performs maintenance to ensure the stability of subsequent work.
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