What is a rolling mill?

A rolling mill is a device that realizes the metal rolling process, and generally refers to the equipment that completes the entire process of rolling production. According to the number of rollers, rolling mills can be divided into two-roller, four-roller, six-roller, eight-roller, twelve-roller, eighteen-roller, etc.; according to the arrangement of rollers, they can be divided into "L" type, "T" type, "F" type, "Z" type and "S" type. Ordinary rolling mills are mainly composed of rollers, frames, roller spacing adjustment devices, roller temperature adjustment devices, transmission devices, lubrication systems, control systems and roller removal devices. In addition to the main components and devices of ordinary rolling mills, precision calenders have added devices to ensure the accuracy of calendering.

Characteristics of rolling mill reducers

Characteristics and damage forms of rolling mill reducers

1. Characteristics of main reducers

Low speed, heavy load, large impact load, and frequent impact times
At present, there are two configurations of reducers used for the main transmission of small and medium-sized rolling mills:
Motor-reducer-rolling mill
Motor-reducer-gear frame-rolling mill
In the first configuration, the reducer is directly connected to the rolling mill and is under severe load. Therefore, it should be distinguished according to the specific use and configuration during design.

2. The damage form of the main reducer gear Production practice has proved that the main forms of damage to the gear of the rolling mill reducer are pitting, plastic deformation, bonding, wear, and peeling.

The concept of rolling mill rigidity

The rolling mill generates huge rolling force during the rolling production process, which is transmitted to the frame through the rollers, bearings, and pressing devices, and is borne by the frame. All these parts on the rolling mill are force-bearing parts, and they will produce elastic deformation under the action of rolling force. For this reason, the actual gap between the rollers when the rolling mill is under force is larger than when it is unloaded. Usually, we call the elastic increase of the roll gap of the rolling mill during rolling as the bounce value.
The bounce value reflects the magnitude of the radial deformation of the rolling mill when the rolling mill is loaded, and it is proportional to the magnitude of the rolling force. Under the same rolling force, if the rolling mill bounce value is smaller, it means that the rigidity of the rolling mill is better. Therefore, the concept of rolling mill rigidity is to indicate the ability of the rolling mill to resist elastic deformation.