The working principle of CNC gear hobbing machine: When the pump is started, the driving wheel drives the driven gear, which rotates in the opposite direction. There is good meshing between the gear and the gear, and the teeth of the two gears scrape away some of the oil at the inlet. Therefore, the liquid that forms low-pressure suction and enters the pump body is divided into two paths, pushed forward by the gear in the gap between the gear and the pump casing, and pressed to the oil outlet to form high-pressure drainage.

Selection of CNC gear hobbing machine hobs:

1. The selection of gear hob accuracy level should be based on the accuracy level or process requirements of the processed gear.

2. Selection of the number of gear hob heads. When precision machining with CNC gear hobbing machines, in order to improve machining accuracy, single head hobs should be selected. When rough machining, in order to improve machining efficiency, multi head hobs should be selected.

3. Selection of spiral direction for gear hobs. When hobbing straight cylindrical gears, right-handed hobs are generally used. When CNC gear hobbing machines are used to cut helical cylindrical gears, the spiral direction of the hob should be the same as the rotation direction of the operation. Right-handed helical gears use stone cutters, while left-handed helical gears use left-hand cutters.

4. Select according to process requirements. For example, for CNC gear hobbing machines that require gear grinding after gear hobbing, a torsional grinding roller must be selected. For those that require gear shaving after gear hobbing, a retained shaving roller should be selected.