In TIG welding this can be accomplished by trigger ignition or when the welded material is struck with the welding electrode (strike ignition). Thus, the voltage is discharged like a bolt of lightning allowing the electricity to flow through the air gap, which creates an arc with a ...
Overhead welding or welding in rain and wind? Electrode welding is the simple and versatile solution.
holds thetungsten electrodein place, and rotates it around the circumference of the pipe or tube being welded. In that sense, the welding head can be called an “electrode holder,” but its meaning can be more generic — applicable to stingers or weld guns. However, unlike welding ...
The material added to help form the join is called filler or consumable. The form of these materials may see them referred to as parent plate or pipe, filler wire, consumable electrode (for arc welding), etc.Consumables are usually chosen to be similar in composition to the parent material,...
Arc Initiation:Once the parameters are configured, the welding electrode is brought into proximity with the workpiece. As the electrode approaches, the welding power source initiates the welding arc by delivering a high peak current. This intense burst of energy generates the arc. ...
I. What is Polarity in Welding? 1) Types of Polarity Direct Current (DC):DC welding machines offer two types of polarity – direct current electrode negative (DCEN) and direct current electrode positive (DCEP). Alternating Current (AC):AC welding involves a constant change in polarity, altern...
Inside the machine is a small motor-driven spool of welding wire (the electrode). The wire is fed down a hose to a trigger-activated welding gun. When the operator touches the wire against the base metal, the arc melts the wire and partially melts the base. In MIG welding, as long ...
Electrofusion welding can be used to weld various metal materials, and the appropriate power source and electrode can be selected for welding according to the actual situation. 3. Can weld thick plates Disadvantages of electrofusion welding 1. It requires the use of equipment with certain high temp...
LESSON II Electrical Stick-Out - In any welding process using a solid or flux cored wire, the electrical stick-out isthe distance from the contact tip to the unmelted electrode end. Sometimes called the "amount of wire in resistance". This distance influences melt-off rate, penetration, and...
Plasma Arc Welding (PAW) Similar to TIG,PAWuses an electric arc between a non-consumable electrode and an anode, which are placed within the body of the torch. The electric arc is used to ionise the gas in the torch and create the plasma, which is then pushed through a fine bore hole...