Arc welding is a process for joining pieces of metal. In this process, the high temperature produced by an electric arc near the surface of the metal causes the metal in the pieces to be joined to melt, and upon cooling, to fuse together.
This course discusses the most common types of arc welding including shielded metal arc welding, gas metal arc welding, and gas tungsten arc welding. This course also illustrates each type and describes the variables and equipment used in each type.
Learning Objectives
- Describe the basic components of the arc welding process
- List the three major types of arc welding
- Describe why shielding is important to arc welding
- Describe the electrode in shielded metal arc welding
- Describe the effect of polarity in shielded metal arc welding
- Describe the electrode in gas metal arc welding
- List what gases can be used in gas metal arc welding
- Describe the electrode in gas tungsten arc welding
- Describe the purpose of a high frequency unit in gas tungsten arc welding