Spot welding is a type of resistance welding that is commonly used in the manufacturing industry to join two or more metal sheets or parts together. This process involves using an electric current to create heat, which melts and fuses the metals together at a specific point.
Who Invented Spot Welding and When?
Spot welding was invented in the early 20th century, and the credit for its invention is usually given to Elihu Thomson, an American inventor and electrical engineer. In 1886, Thomson developed the first practical electric resistance welding machine, which was used for spot welding and other welding processes.
Types of Spot Welding
There are several types of spot welding, including:
Resistance Spot Welding: This is the most common type of spot welding, which involves using two copper alloy electrodes to apply pressure and electric current to the metal sheets or parts.
Capacitor Discharge Spot Welding: This type of spot welding uses a bank of capacitors to discharge a high-voltage electric current into the metal sheets or parts, which creates a localized heat to fuse them together.
Projection Spot Welding: This type of spot welding involves creating small projections on the surface of the metal sheets or parts, which are then welded together by applying pressure and electric current to the projections.
Why Is Spot Welding Used and What Is It Used For?
Spot welding is used for several reasons, including its speed, efficiency, and reliability. It is a fast and cost-effective way to join metal sheets or parts together, and it can be used to create strong and durable welds.
Spot welding is commonly used in the automotive industry to join metal sheets and parts together to create car bodies and other components. It is also used in the construction of appliances, such as refrigerators and washing machines, as well as in the manufacturing of metal furniture, containers, and other products.