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## How Does Welding Machine Work?
1. How does a welding machine join metal pieces together?
2. What is the role of electricity in a welding machine?
3. What are the main types of welding machines?
## Answers.
1. A welding machine works by using electricity to create an electric arc between an electrode and the metal pieces being joined. The heat generated by the electric arc melts the metal, which then cools and solidifies to form a strong bond between the pieces.
2. Electricity plays a crucial role in a welding machine by providing the power needed to create the electric arc. The electricity flows from the welding machine's power source to the electrode, creating a circuit that generates intense heat at the point of contact with the metal. This heat is what melts the metal and allows it to be joined together.
3. There are several main types of welding machines, each designed for specific welding applications. Some common types include:
- Stick welders: also known as shielded metal arc welding (SMAW) machines, use a consumable electrode coated in flux to create the electric arc.
- MIG welders: or gas metal arc welding (GMAW) machines, feed a continuous wire electrode through a gun that also releases a shielding gas to protect the weld from contaminants.
- TIG welders: or gas tungsten arc welding (GTAW) machines, use a non-consumable tungsten electrode to create the electric arc, while a separate filler rod may be used to add material to the weld joint.
- Flux-cored welders: similar to MIG welders, but use a tubular wire filled with flux instead of a solid wire with shielding gas.
In summary, welding machines work by using electricity to create an electric arc that melts metal pieces together, forming a strong bond. Different types of welding machines are available for various welding applications, each with unique features and capabilities.
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