2-3 years. Riveting apprentices need to learn mechanical drawing, metal materials and heat treatment, welding technology, fitter technology, mechanical design, mechanical manufacturing, hydraulic transmission and other knowledge. This knowledge can be learned by attending training courses, internships and practices in enterprises. Usually, the study time of riveting apprentice is 2-3 years, but the specific length depends on the individual's learning ability and practical experience. Riveting is a kind of manufacturing technology to make plates, profiles, wires and pipes into steel structures by welding, riveting and bolting. It is the commander in chief in the construction of metal components. According to the processing technology, it is divided into lofting, marking, blanking, forming, manufacturing, calibration and installation.