Blog
We look forward to working with you,mutual benefit and win-win,create brilliant!
Let's help you
MoreLatest News
Precision roll manufacturers explain the basics of roll
Release time:
2018-12-06 11:26
Precision roll manufacturers -- nanyang machinery to explain the basic knowledge of roll. Roller is a tool that causes plastic deformation of metal and is an important consumable component that determines the efficiency of the mill and the quality of the rolled material.
precision roll manufacturers -- nanyang machinery to explain the basic knowledge of roll. Roller is a tool that causes plastic deformation of metal and is an important consumable component that determines the efficiency of the mill and the quality of the rolled material.
According to the forming method, the types of rolls can be divided into casting rolls and forging rolls; according to the process method, they are divided into integral rolls, metallurgical composite rolls and combined rolls. Integral roll is divided into two kinds of integral casting and integral forging roll.
The overall roll is relative to the composite roll, the overall roll of the roll body outer layer and the heart and the roll neck using a single material casting or forging, the roll body outer layer and the roll neck different tissue, performance through the casting or forging process and heat treatment process to control and adjust.
Precision roll manufacturers know that the working conditions of the rolls in the rolling mill components are the most complex. The roll generates residual stress and thermal stress in the preparation process before manufacture and use. When used, it is further subjected to various periodic stresses, including bending, torsion, shear, contact stress and thermal stress. The distribution of these stresses along the roll body is uneven and constantly changing. The reasons are not only design factors, but also the wear, temperature and roll shape of the roll during use. In addition, the rolling conditions are often abnormal. Improper cooling of the roll after use can also be damaged by thermal stress. So the roll in addition to wear, but also often appear cracks, fracture, peeling, indentation and other local damage and surface damage. A good roll, its strength, wear resistance and other various performance indicators should have a better match. In this way, it is not only durable under normal rolling conditions, but also has less damage when some abnormal rolling conditions occur. Therefore, the metallurgical quality of the roll should be strictly controlled or supplemented by external measures to enhance the bearing capacity of the roll. Reasonable roll shape, pass, deformation system and rolling conditions can also reduce the work load of the roll, avoid local peak stress, and extend the life of the roll. Roll consumption is determined by three factors: ① mill, rolling material and rolling conditions, as well as the rational choice of rolls; ② roll material and its manufacturing quality; ③ roll use and maintenance system.
Precision roll manufacturers have different performance requirements for the core and working surface of most rolls. When it is difficult to meet the requirements with a single material, the inner and outer layers can be made of two materials respectively. The composite process can use mechanical combination, composite casting and other multi-layer technology. Repair roll commonly used surfacing technology.
Latest News
Contact Us
Tel :+86-514-87736047
Phone :+86-15062802588
E-mail : market@nanyangmill.com
Address : Yangshou industry park,Hanjiang District, Yangzhou City, Jiangsu Province, China
Business License
This website already supports IPV4 / IPV6 bidirectional access