With the improvement of forging technology, many manufacturers at home and abroad have adopted precision forging technology, changing the short tooth and straight tooth processing technology to precision forging tooth profile, which is realized by extruding tooth profile. By changing the traditional gear hobbing technology, the gear quality is improved, the machining quantity is reduced, and the steel consumption is saved to a great extent. In the process of tooth machining, tooth blank machining can not be ignored. The quality of gear blank machining is an important measure of gear machining accuracy.
At present, a considerable number of manufacturers have adopted numerical control lathe (CNC) as the main equipment for gear blank processing, which greatly reduces the deviation of gear reference end face runout and inner hole size.
In terms of gear manufacturing, the most obvious progress is the high-efficiency CNC gear hobbing technology. Its high efficiency mainly depends on the multi head of hob and the physical vapor deposition treatment of hob. Both multi head and coating hob processing have good economic benefits. At the same time, gear hobbing hobs at home and abroad are developing towards integrity, small diameter and multi head, with high tool efficiency and less wear, which will make the production efficiency of gears reach a new stage.