How To Do Aluminium Arc Welding. Spray arc welding requires a constant current and constant voltage machine while pulse welding requires an inverter power supply. These are a more recent technology and allow arc welding aluminum with a conventional welder rather than using a special gas-shielded wire feed welder like a MIG metal inert gas or TIG tungsten inert gas welding machine often referred to as heliarc welding since helium was the gas used to shield the arc flame while welding.
To weld aluminum operators must take care to clean the base material and remove any aluminum oxide and hydrocarbon contamination from oils or cutting solvents. How to MIG Weld Aluminium. Use a string bead technique as you move along the weld but be careful not to change the angle of the electrode as you proceed.
Prepare your push-pull wire feed Clean your aluminum remove any oxide and file the edges that will be joined Avoid pulling while weldinginstead push at.
To weld aluminum clamp the aluminum pieces together tightly and use a propane torch to preheat them to a temperature between 300F and 400F. To weld aluminum clamp the aluminum pieces together tightly and use a propane torch to preheat them to a temperature between 300F and 400F. The polarity will depend on the electrode you are using. Stick welding Aluminum polarity.