Detailed explanation and application of finishing machine technology

Skin Pass Mill is an important equipment in metal rolling production line, which is mainly used to improve the surface quality of metal plate, eliminate residual stress and improve the flatness and mechanical properties of plate. It is a key link in the production of cold-rolled steel plates, galvanized steel plates and other coated products. This paper will deeply analyze the working principle, equipment structure, technical characteristics and application in various fields of the finishing machine.

Working principle of finishing machine

The core function of the finishing machine is to finish the surface and optimize the properties of the rolled plate through tiny compression deformation.

Micro-pressure deformation principle

The deformation applied by the finishing machine to the steel plate is usually controlled in the range of 0.5%~2%. This micro-pressure deformation will not significantly change the thickness of the plate, but it can effectively improve the surface quality and adjust the mechanical properties.

surface treatment

The finishing machine uses the smoothness of the work roll surface to make the steel plate surface smoother or form a special texture structure (such as extinction effect) through contact friction.

Equipment structure of finishing machine

The finishing machine usually consists of several key parts, and its design and configuration vary according to the purpose and process requirements:

Work roll and backup roll

Work roll: it is in direct contact with the steel plate, and is used to apply pressure and finish the surface.

Support roll: provide stable support to prevent deformation of work roll and ensure uniform distribution of rolling pressure.

Transmission system

The finishing machine controls the speed and direction of the roller table through a precise transmission system to ensure the uniformity and continuity of rolling.

hydraulic pressure system

The hydraulic system is used to adjust the pressure of the work roll, and can accurately control the finishing process parameters according to different plate types and thicknesses.

Measurement and control system

Modern finishing machine is equipped with on-line measuring equipment, which can monitor the thickness, flatness and surface quality of steel plate in real time, and adjust the operating parameters by using closed-loop control technology.

Lubrication and cooling system

In order to prevent the roller table from overheating or scratching the steel plate, the finishing machine is equipped with lubrication and cooling system to reduce friction and improve rolling efficiency.

Process function of finishing machine

The main functions of the finishing machine include:

Improve the surface quality of plate

Through the finishing process, the smoothness of the plate surface can be significantly improved, and scratches, spots or other defects in the rolling process can be eliminated. In addition, the customization of surface texture can be realized by special roller.

Improve flatness

The finishing machine can eliminate the wavy defects (such as edge wave and medium wave) of the plate and improve its flatness to meet the requirements of subsequent processing.

Enhance mechanical properties

Through finishing deformation, the yield strength of the steel plate is slightly improved and the plastic strain is reduced, thus improving the formability and processing adaptability of the steel plate.

Adjust surface texture and roughness

The finishing machine can adjust the surface roughness of steel plate to improve the adhesion of coating according to the requirements of downstream coating or molding process.

Finishing machine is an important equipment in the process of metal plate processing. Through its precise finishing process, the surface quality, flatness and performance of steel plate have been significantly improved. With the continuous progress of industrial technology, the finishing machine will further develop in the direction of automation, energy saving and intelligence, providing better processing support and solutions for many industries.