The steel sheets used in the car bodies are sent from the steel-making company to the factory in big rolls. The steel is made flat before it is used. The steel sheet is cut according to the size of the part and then is bent and cut in a stamping machine to make parts such as car doors, roofs, and hoods. The stamped parts are inspected and then transported to the welding process. Steel sheets are transported to the factory in big rolls. A stamping machine The stamping process