1: Convex and concave roller shape is adopted. The curve of the roller shape is composed of straightening, rolling and transition zone. It has the dual functions of straightening and rolling. It is a line contact type and can achieve straightening and rolling in the full length.

2: Adopting the principle of constant pressure load control to roll compression and straightening, to ensure the pressure required for straightening and rolling on the bar, and to reduce the head and tail diameter reduction phenomenon.

3: The main drive adopts AC motor, the reduction box frequency conversion stepless speed regulation, the roll gap adopts electric adjustment, and the scale display is sensitive and reliable, easy to operate and maintain.

4: The hydraulic system is equipped with a hydraulic station, which uses a vane pump as a power source, and a direct-acting relief valve is used for overload unloading, which plays a role of maintaining pressure and buffering.

5. Fine leveling rolling machine: a frame structure with two beams and four columns. The two rollers are all active, and the upper and lower rollers are equipped with angle adjustment mechanisms and side guides.