新闻中心
News
What should be paid attention to when classifying and selecting rollers
时间：2023-06-14 11:47
来源： network
The main working components and tools on a rolling mill that cause continuous plastic deformation of metal. The rolling roller mainly consists of three parts: the roller body, the roller neck, and the shaft head. The roll body is the middle part of the roll that actually participates in rolling metal. It has a smooth cylindrical or grooved surface. The roller neck is installed in the bearing and transmits the rolling force to the frame through the bearing seat and pressing device. The transmission end shaft head is connected to the gear seat through a connecting shaft, transmitting the rotational torque of the motor to the rolling roller. The rolls can be arranged in the form of two, three, four, or multiple rolls in the rolling mill frame.
Roll classification
There are various methods for classifying rolls, mainly including:
(1) According to product types, there are strip steel rolls, profile steel rolls, wire rod rolls, etc;
(2) According to the position of the rolling rolls in the rolling mill series, they are divided into blooming rolls, rough rolling rolls, finishing rolls, etc;
(3) According to the roll function, there are scale breaking rolls, piercing rolls, leveling rolls, etc;
(4) According to the material of the rollers, they are divided into steel rollers, cast iron rollers, hard alloy rollers, ceramic rollers, etc;
(5) According to manufacturing methods, there are casting rolls, forging rolls, surfacing rolls, sleeve rolling rolls, etc;
(6) According to the state of the rolled steel, there are hot rolling rolls and cold rolling rolls. Various classifications can be combined accordingly to give rolling rolls a clearer meaning, such as centrifugal cast high chromium cast iron work rolls for hot-rolled strip steel.
Roller selection
The commonly used roller materials and applications are shown in the table. The performance and quality of rolls generally depend on their chemical composition and manufacturing method, and can be evaluated by their microstructure, physical and mechanical properties, as well as the type of residual stress present inside the rolls (see Roll Inspection).
The use effect of rollers in rolling mills not only depends on the material and metallurgical quality of the rollers, but also on the usage conditions, roller design, and operation and maintenance. There are significant differences in the usage conditions of rolls for different types of rolling mills, and the factors that cause the differences are:
(1) Rolling mill conditions. Such as rolling mill type, rolling mill and roll design, pass design, water cooling conditions, and bearing types;
(2) Rolling conditions such as rolled material variety, specifications and their deformation resistance, reduction and temperature systems, production requirements and operations;
(3) Requirements for product quality and surface quality, etc.
推荐新闻