The principle of

Theory of rolling: rolling is a material processing method in which the rolled parts are dragged into the rolls by the friction force of the rotating roller, and the rolled parts are compressed and deformed between two or more rolls by the pressure exerted by the roller.

Rolling parameters: rolling deformation process, thickness direction compression is the dominant deformation. When rolled piece thickness direction by roll compression, will make the metal occurs along the longitudinal and transverse flow, but the extension of the longitudinal deformation is always far more than horizontal extension amount, this is because the roller surface friction for wide block is always greater than the longitudinal flow, that is, relative to the longitudinal and lateral spread is always smaller, rolling deformation index mainly for:

Absolute drop: represents the absolute change of thickness before and after rolling, facilitating direct adjustment of roll gap value in production operation.

Processing rate: used to record the approximate degree of deformation.

Wide-spread: Used at the production site to represent the absolute value added of Wide-spread.

The most basic parameters involved in the production site are the above several, others such as elongation, elongation coefficient and so on are just for theoretical analysis. Therefore, the most used in the field is to calculate the length and processing rate after rolling according to the constant condition of the volume of metal plastic deformation.

The material: NES-M2021-2008 SP252-540

Automotive steel is mainly composed of sheet steel and special steel, with high strength, thin specification and corrosion resistance, high production technology. Compared with ordinary steel such as construction steel, automotive steel belongs to high value-added products, mainly reflected in the following aspects:

(1) High technical content. With the continuous improvement of the level of automotive products, the requirements for automotive steel are also increasing day by day. First of all, in order to reduce the weight of automotive products, save materials, reduce fuel consumption, reduce costs, and improve safety standards, it is necessary to use high strength and thin specification steel. Secondly, in order to improve the anti-corrosion performance of automobile products, prolong the service life of the automobile, it is necessary to improve the surface treatment technology of the automobile inside and outside the plate, such as the use of galvanized sheet or alloy galvanized sheet.

(2) Advanced production equipment, high level of production technology. The production of automotive steel requires the use of advanced production equipment, so the scale of investment is relatively large, and from investment construction to completion and production, to fully achieve the design of production capacity generally needs about 5 years. In addition, due to the high requirements for the production process, there are also high requirements on the level and structure of the production personnel.    

The steel described provides stamping, swing shearing, leveling, laser cutting, laser welding and strip processing, and we also have a professional logistics team to provide you with a full range of services.

Let us know if you're interested.