What are the requirements for the gear machining of the spur gear slewing drive?

Due to need to transmit force, slewing bearings usually have gears on a ring, the outer ring with gears is the external gear slewing ring, the inner ring with gears is the internal gear slewing ring. Commonly used gear shapes are spur gears and helical gears.

Gear machining:

What equipment is used to process the gears of the slewing ring? Generally, gear hobbing machines are commonly used for external gears and gear shapers for internal gears. With the upgrading of processing equipment, now there are high efficiency gear milling machines. According to the accuracy requirements, the gears with general accuracy are directly processed and formed. As for the gears with precision requirements, rough machining is carried out first then doing finish machining, processed in two times, can have higher accuracy. For the gears with particularly high precision requirements, rough machining first, then finish machining and finally using gear grinding machine to grinding gears to finally meet the precision requirements.

Heat treatment of gears:

The heat treatment statuses of the gears are generally normalizing condition or tempering condition. The gear surface can also be quenched according to customer requirements, quenching hardness is HRC50～60 and at the same time can guarantee enough depth. According to different applications, gear quenching can be divided into gear integral induction quenching and single gear induction quenching. Single gear induction quenching can be divided into gear surface gear root quenching and gear surface quenching. Gear quenching can increase the load capacity of the gear, greatly increase the gear wear resistance and extend the service life.

From left to right are:

1. Gear integral quenching

2. Gear surface and root quenching

3. Gear surface quenching

The gears of the gear ring of the spur gear slewing drive and pinion gear surface have been quenched to increase the gear load capacity, greatly increase the gear wear resistance and extend the service life. The high precision gears are processed by grinding after quenching to ensure gear accuracy and meet the requirements of high rotation accuracy.