2. Principles of Arc
Welding
• Arc Welding is the process in which heat is generated by the electric
arc struck between an electrode and the work piece.
• Any arc welding method is based on an electric circuit consisting of the
following parts:
• Power supply (AC or DC);
• Welding electrode;
• Work piece;
• Welding leads (electric cables) connecting the electrode and work
piece to the power supply.
3. SMAW Principles
oThe American Welding Society defines SMAW as Shielded
Metal Arc Welding
oSMAW:
-is commonly known as stick welding or manual arc
welding.
-is the most widely used arc welding process in the world.
-can be used to weld most common metals and alloys.
4. Basics of Arc
Welding
• The arc is struck between the electrode and the metal.
• It then heats the metal to the melting point.
• The electrode is then removed, breaking the arc between the
electrode and the metal. This allows the molten metal freeze the
solidity.
