It requires a lot of experience patience and skill to get the desired results.
Spot welding aluminum sheet metal.
Welding aluminum requires a thorough understanding of the tig welding process and also requires a tig torch.
Tig welding is an advanced technique that involves the use of both hands in a slow and controlled manner.
It s also easy to do with a spot welding machine which has 2 electrode tongs about 6 inches 15 cm long that pass an electrical current through the metal to fuse them together.
The high quality finish and verstaile nature make it a common choice for welding aluminum and other metals.
This type of electrical power is wanted for the big output current that spot welding requires.
Techniques for welding sheet metal.
Use three phase electrical energy to spot weld aluminum.
Typical aluminum alloys for sheet fabrication are 3003 and 5052.
In this video lazze shows how you can spot weld aluminum with a standard 220 volt spot welder that is probably already in your shop.
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Aluminum spot welding is becoming more common as aluminum replaces steel in many applications where weight is main such as automobiles.
Filler metals for either of these would be 4043 or 4943.
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For commercial quality welds on 1 2mm mill finished sheets weld settings are typically in the region of.
For designers welding also offers a lot of freedom because you don t have to design flanges to accommodate a rivet or spot weld and geometry can be more dynamic.
The more time the arc is in an area the hotter it.
When welding sheet metal the main thing to look out is to prevent warping and burn through.
The standard bs en iso 18595 resistance welding spot welding of aluminium and aluminium alloys weldability welding and testing provides useful guidelines.
Spot welding uses the heat from an electrical current to join 2 pieces of metal quickly and is typically used for joining sheet metal.
To prevent burn through and warping don t whip or weave the torch.