The gearbox housing is mostly made of aluminum alloy die-casting parts, and the coaxiality and positional requirements of the bearing holes are extremely high. PCD cutting tools are the preferred choice in precision boring, with a lifespan of tens of thousands of pieces; The milling of the connecting surface is suitable for using PCD milling cutters, which can complete large-area machining with one cut and ensure the flatness of the sealing surface.
Gears are usually made of carburized and quenched steel with a hardness between HRC58-62. The turning of gear inner holes and cutting of end faces are mainly carried out with CBN inserts, which can perform hard cutting by replacing grinding with turning, greatly reducing the machining cycle time. The cutting of splines and keyways requires high-performance high-speed steel or hard alloy cutters.
The synchronizer hub and sleeve have high requirements for tooth profile accuracy, and are often processed by powder metallurgy sintering and finishing. CBN cutting tools perform excellently in precision turning of such hard materials, ensuring stable dimensional accuracy and efficient machining.