First of all, it is strongly recommended to buy a set of special aluminum wire feeding tools, which will include the following items:
1. Non-metallic gasket-designed to minimize wire feeding friction.
2.u-groove drive roller-used to prevent aluminum wire from breaking or deformation. These drive rollers will not scratch the aluminum wire like V-groove rollers. If the V-groove roller is used, the welding wire will scratch the gasket, resulting in blockage and wire feeding failure.
3. Inlet and outlet guides-designed to avoid chafing of welding wire.
4. Contact head-The contact head used in aluminum welding has an opening with a larger diameter, because when the aluminum wire is heated, it expands more than steel. Therefore, the size of the special contact head for aluminum wire is small enough to allow expansion while maintaining electrical contact.
Load welding wire into welding machine.
This paper introduces a small skill of correctly loading aluminum wire, which is very important for loading aluminum wire and avoiding welding failure. Hold the welding wire shaft safely with one hand to ensure that it will not loosen. After opening the cellophane package, hold the loose end of the welding wire with the other hand-don't let go before putting it into the driving roller. Inexperienced people usually don't hold the loose end tightly, which causes the whole bundle of welding wire to loosen and spread. If this happens, it will be irreversible and the welding operation will be greatly affected-you must buy another bundle of welding wires.
Set the tightness of the welding wire brake.
The tightness only needs to ensure that the welding wire just now will not come loose, but it should not be too tight, otherwise it will drag the welding wire. To set it correctly, first adjust the tightness to the minimum, then install the welding wire and let it pass through the drive roller. If all the components except the welding wire roller stop, it means that it is not tight enough. Be careful when operating, because too tight will cause too much stress on the welding wire. In addition, don't be nervous if you can't send the wire in the last few laps after using the welding wire; Usually because the welding wire is too hard and easy to loosen.
Set the tightness of the drive roller.
This may be the most important step in the whole setup process. Experts suggest that the thread end forms a small angle of 65438 0 inches with the surface of insulating material. Then, set the wheel tightness to almost minimum. Press the switch on the welding torch and observe its operation-the welding wire should slip when it touches the surface of insulating material. From that point on, tighten until the welding wire stops slipping. Once again, it should be noted that too tight will cause the welding wire to break. This means that the welding wire is left in the welding gun, and the welding wire drive drum is still rotating. The final result is that the welding wire breaks after running out of the drum, or the welding wire is in a mess due to backward backlog, including the guide liner and the welding gun liner. Remember, when you set the tightness of the roller according to the above contents, press the switch of the welding torch, and the welding wire is hot, so you must wear good quality welding gloves.
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Ensure a good power connection.
The first step is to clamp the welding fixture safely in the unpainted and unpolluted area of the welding workpiece. To clean the workpiece, please use degreasing solvent to remove all grease. Make sure that the surface of the workpiece is dry before welding. At the same time, do not weld with nearby combustible materials, such as solvents or paint containers. Step 2, clean the oxide on the aluminum surface with a clean stainless steel wire brush.
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Positioning is very important.
When welding, try to keep the welding torch cable straight and minimize the wire feeding constraint on soft aluminum wires. Bending of welding torch cable will lead to knotting of welding wire, which will lead to poor wire feeding.
Matters needing attention
Matters needing attention in aluminum profile welding
Welding of aluminum pipes?
Welding characteristics of 1: aluminum and aluminum alloys have the characteristics of strong thermal conductivity, large heat capacity, large linear expansion coefficient, low melting point and low high temperature strength, which makes welding difficult. Some measures should be taken to ensure the welding quality.
2 Pipe fittings and welding wires should be cleaned. Clean the welding wire and the surface within 50mm on both sides of the break with acetone, and brush off the oxide film on the surface with stainless steel wire to make it appear metallic luster. The cleaned breach shall be welded within 2 hours, and the cleaned welding wire shall be put into the unused cylinder and must be used up within 8 hours, otherwise it shall be reprocessed.
The tungsten rod should be cerium tungsten rod, with inert argon gas not less than 99.96% and water content not more than 50mg/m3. 4 The ambient temperature shall not be lower than 5℃, otherwise it shall be preheated to 100~200℃ before welding, and the relative humidity shall be controlled.
If you want to weld aluminum at home or in the workshop, first of all, we need to clarify the following things that are misunderstood by the public:
You need at least a welder worth $4,000 and superb welding skills to weld aluminum;
Good welding operation can be completed without practice;
You need to buy an expensive welding torch suitable for aluminum welding.