RV planetary gear hobbing, liquid expansion fixture

The RV planet gear rolling cutter fixture is a high-precision fixture specifically designed for the machining of the planet gear rolling cutter in RV reducers. Below is a detailed description of the fixture:

I. Structural Features

The RV planetary gear liquid expansion clamping fixture is mainly composed of the fixture body, liquid expansion mandrel, sealing components, driving device, and positioning elements. The liquid expansion mandrel is the core component of the fixture, which achieves positioning and clamping of the planetary gear through static pressure expansion technology. The fixture body is used for installing and supporting other components, ensuring the precise positioning of the workpiece. The sealing components ensure the hydraulic cavity within the fixture is well-sealed, preventing hydraulic oil leakage. The driving device provides the power for the liquid expansion mandrel to expand or contract, typically using hydraulic drive. The positioning elements ensure the accurate position of the planetary gear within the fixture.

II. Working Principle

During the RV planetary gear hobbing process, the working principle of the liquid expansion fixture is as follows:

1. Place the planetary gear on the fixture main body and accurately position it with the locating elements.

2. Engage the drive unit, and under the action of the pressure mechanism, the hydraulic medium generates pressure, forcing the liquid-filled core shaft to undergo elastic deformation, thereby expanding and fitting tightly against the inner or outer surface of the planetary gear.

3. After clamping, the gear hobbing machine begins processing. During the process, the fixture maintains a stable grip on the planetary gear, ensuring processing accuracy and stability.

4. After processing, turn off the driving unit. The liquid-expanded mandrel will return to its original shape after pressure is released, allowing the planetary wheel to be easily removed.