Gear hobbing machine is a machine tool used for machining straight and helical cylindrical gears, as well as workpieces such as worm gears and sprockets. The working principle of a gear hobbing machine is based on the generation method, which achieves continuous and high-speed machining of gears through the relative motion between a specially designed hob and the workpiece. The hob has multiple grooves on the worm gear, which form cutting edges for cutting the entire gear. Throughout the entire machining process, the relative motion between the hob and the workpiece ensures the meshing motion of the gear involute, thereby improving machining efficiency and quality.