Rolling technology is an important process technology in the production of metal materials. In modern industry, it is widely used in steel rolling, aluminum rolling and copper rolling. Rolling technology not only improves the processing performance of metal materials, but also reduces the processing cost and improves the economic benefits.
Rolling technology is divided into hot rolling, cold pressing and warm rolling according to the temperature of rolled metal materials. Hot rolling is a kind of rolling process in which metal materials are heated to a certain temperature above the recrystallization temperature, so as to obtain a certain thickness, shape and size of rolled products. Hot rolling has many types, such as continuous hot rolling, flat hot rolling, hot wide strip rolling and hot strip rolling. Of course, not only steel and nonferrous metal materials can be hot rolled, but also nonmetallic materials such as plastic and rubber.
Cold rolling is a kind of rolling which does not add a lot of heat to the rolled material, but also rolls it at room temperature. It is usually used for rolling thin sheet and copper, aluminum and other nonferrous metal materials in order to improve the fineness or to obtain certain mechanical properties, so as to meet the requirements of different industrial mechanical properties.
Professional rolling equipment is the key to rolling technology. There are three main kinds of rolling mills: tandem mill, double-row mill and unilateral mill. Among them, the multi-row rolling mill is the main equipment of modern rolling. The double-row mill is a set of two rolling mills which are installed face to face and operated separately, while the unilateral mill is composed of several individual rolling mills, which are connected and driven by gears.
Rolling process is an important step in the production of final product in cold rolling, hot rolling and warm rolling. There are many kinds of rolling technology, the purpose of rolling is to match the product drawings required by users. In the process of rolling, the experts in the engineering laboratory adjust the technical parameters such as rolls, roll parameters, roll gap, roll speed and roll temperature, etc., and strive to make the rolled products reach the ideal requirements.
In the rolling process, there are two important indicators, one is deformation rate and the other is rolling force. The deformation rate represents the ratio of finished product rolling thickness to original rolling thickness, and the roll force represents the resistance encountered in the process of rolling. Experienced operators can judge the quality of rolling process through these indicators.
Besides, after rolling process, the surface of rolled products will also be treated. Generally speaking, there are mainly three kinds of post-treatment of the rolled surface, that is, drawing bright, antique drawing and orbital drawing. Bright drawing is to make the surface of the rolled material have different levels of brightness, antique drawing is to make the surface of the rolled material slightly black stripes, and orbital drawing is to make the surface of rolled material have a trace of winding track.
In conclusion, rolling technology is a very important technology in the production of metal products. In modern industry, rolling technology is widely used in steel rolling, aluminum rolling and copper rolling, and various rolling equipment can be designed according to different product requirements. In the rolling process, many parameters such as roll gap and roll speed are required to be adjusted. The surface of rolled products often need to be treated after rolling, such as bright drawing, antique drawing and orbital drawing.
