Roll Universal Shaft

The cardan shaft of the rolling mill is an indispensable key transmission component in the metallurgical industry rolling mill equipment, mainly used to transmit torque and rotational motion between the rolling mill and the reducer or motor. This specially designed universal joint can compensate for the axial, radial, and angular displacements of the rolling mill caused by thermal expansion, mechanical deformation, or adjustment of the rolling line height during the rolling process, ensuring the stable operation of the transmission system under various working conditions.

The universal shaft of the rolling mill is usually composed of the following key components:

1. Shaft body: including the intermediate shaft and two end connectors, usually forged from high-strength alloy steel

2. Universal joint mechanism: adopting a cross axis or ball cage design, allowing for a certain degree of deflection
   

3. Spline expansion device: compensates for axial displacement, usually using involute splines or rectangular splines
   

4. Lubrication system: centralized automatic lubrication or manual lubrication device
   

5. Safety protection device: including protective cover, torque limiter, etc

The universal joint of the rolling mill can achieve motion compensation in three dimensions through its unique structural design:

1. Angle compensation: Universal joints allow for a certain angle (usually 15 ° -30 °) between the centerlines of two axes

2. Axial compensation: The spline structure allows the length of the shaft to vary within a certain range

3. Radial compensation: specially designed to absorb a small amount of radial offset

This multi-directional compensation capability enables the rolling mill to adapt to various displacements of the rolling mill rolls during the rolling process, ensuring the continuity and stability of torque transmission.

Roll universal shafts are widely used in various rolling mill equipment:

1. Hot rolling production line: strip rolling mill, section steel rolling mill, rod and wire rolling mill
   

2. Cold rolling production line: Cold rolling thin plate mill, foil rolling mill
   

3. Special rolling mills: steel pipe rolling mill, wheel hub rolling mill, etc

Correctly selecting, using, and maintaining the universal joint coupling of the rolling mill is of great significance for ensuring stable operation of the rolling mill and reducing production costs.