What is the process of punching and tapping called?

The process of punching and tapping is called "punching and threading". This is a process of punching and tapping holes in sheet metal to create threaded holes in the sheet. In the thread punching process, the metal sheet is first punched using equipment such as a punch or impact machine to create the required holes. A tapping tool is then used in the punched hole to create a threaded structure for the hole to accommodate threaded connections such as screws or nuts. The punching and tapping process is commonly used in the manufacturing and processing of sheet metal.