Spot welding

Spot welding is when two pieces of metal are joined together by heating up a small spot between them until they melt and fuse into one solid piece. It's kind of like sticking two ice cubes together with a hot glue gun.

To do spot welding, you need a special machine called a spot welder. This machine works by sending a big burst of electricity through two small metal points that press down on the pieces of metal you want to join together. This electricity makes the metal points really hot and melts the metal underneath them. When the metal cools down again, it makes a super strong bond that holds the two pieces of metal together.

Spot welding is used a lot in making things like cars, bicycles, and appliances because it's a fast and efficient way to join metal parts together. It's also really good at making strong bonds between metals that are hard to solder or glue together.