What Is a Three Roll Mill?

The rolling mill has three rolls to achieve rolling. The diameter of the upper and lower rolls is larger, which helps the motor drive. The diameter of the middle roll is smaller, which is driven by the friction of the upper and lower rolls.

Three-roll mill with high rigidity

The middle bearing block of the rolling mill is fixed on a "U" frame and has 4 screws. The upper and lower bearing blocks can each have high rigidity.

The bearings adopt double-row radial spherical roller bearings, with retractable sleeves; they can be loaded and unloaded with bearing loading and unloading pressure devices (hydraulic nuts), so they are easy to load and unload, and the radial clearance of the bearings can be adjusted slightly. In short, in the production process, the bouncing value of the rolling mill is easy to control. Because the load-bearing components are reduced, the bounce value is small.

Easy adjustment of three-roll mill

The upper and lower rollers are easy to adjust and have good self-locking performance. The middle bearing block has 4 screws, and the upper and lower bearing blocks have nuts and a worm gear transmission mechanism, which are precisely adjusted.

Unique structure of three-roll mill

The upper balance device has a unique structure. The butterfly spring is placed on the upper part of the upper screw and is equipped with an adjustment mechanism, so the spring force can be adjusted online at any time.

Three-roll mill installed securely

The base is a "U" -shaped frame, and the rolling mill is installed firmly. The middle bearing seat is fixed on the "U" -shaped frame, the upper and lower bearing seats are adjusted separately, and there is an axial fixing mechanism, which is fastened on the U-shaped frame. Therefore, during the production process, the rolling mill is very stable, the vibration is small, and the size of the rolling stock is greatly affected.

Three-roller mill with good fixability

Good axial adjustment and fixation. The rolling mill should minimize the number of force parts and coupling parts to improve the stability of the axial fixation. This is beneficial to control the dimensional accuracy of the rolled stock. ^[2]