Welcome to the official website of Fujian Sanlian Metallurgical Technology Development Co., Ltd.!
What are the main factors affecting the rolling pressure in a steel rolling mill?
Release date:
2019-11-01
Rolling pressure is crucial for steel rolling mills, as it is the force that enables plastic deformation during the process. There are three primary factors that significantly influence the rolling pressure in steel mills: 1. Temperature effects, 2. Work hardening impacts, and 3. The interplay between workpiece thickness and roll diameter. Below, Fuzhou Jinquan Metallurgical Machinery Equipment Co., Ltd. will provide a detailed explanation of how these three factors affect steel rolling operations.
Rolling pressure for Steel rolling mill This is extremely important—it’s the force that causes plastic deformation in the rolling mill. There are three primary factors influencing the rolling pressure of a steel mill: 1. The effect of temperature, 2. The impact of work hardening, and 3. The influence of the workpiece thickness and roll diameter. Below, Fuzhou Jinquan Metallurgical Machinery Equipment Co., Ltd. will guide you through these three key factors affecting the steel rolling process.
What factors influence the rolling pressure in a steel rolling mill? Temperature plays a key role: higher temperatures reduce deformation resistance, while increased deformation speeds lead to greater resistance. (These effects are less pronounced in cold rolling.) Additionally, the type of steel significantly impacts the process—since different materials have varying mechanical properties, their deformation resistance also differs accordingly.
The effect of work hardening occurs when rolling is performed below the recrystallization temperature, causing distortions and dislocations in the material's crystal lattice, which increases internal energy and, consequently, raises the resistance to deformation—leading to the phenomenon of work hardening. Additionally, friction plays a significant role in this process.
The influence of strip thickness and roll diameter: Thinner strips require greater rolling force. Under the same conditions, a smaller roll diameter (on the work rolls) results in lower rolling force.
Additionally, tension plays a critical role—back tension has a stronger effect than front tension, causing the neutral plane to shift toward the exit side. Importantly, tension can help reduce the overall rolling force.
The general principle for allocating reduction rates per pass is as follows: First and second passes have the highest reduction rates, after which the reduction rate gradually decreases as the strip undergoes increasing work hardening. This ensures that the rolling pressure remains consistent across all passes. Finally, the last two passes typically employ lower reduction rates to maintain optimal flatness and thickness accuracy.
That’s all about the steel rolling mill—stay tuned to our official website if you’d like to learn more!
Latest news
How to adjust the axial assembly of the rolling mill?
First is the mill’s entire radial adjustment mechanism. The key lies in utilizing a linkage formed by the connection between the sleeve and the universal coupling, a setup more commonly employed for external radial adjustments. It is precisely for this reason that both the lower compression nut of the bending pad and the compression nut itself are connected to standard screws and bearing housings.
2022-07-01
Introduction to Cryogenic Rolling
Low-temperature rolling involves heating steel billets to temperatures lower than conventional heating levels, followed by rolling performed at these reduced temperatures—more precisely referred to as medium-temperature rolling. The primary goal is to significantly cut down on fuel consumption required for billet heating and minimize metal burn-off during the process.
2022-01-18
Rolling Mill: What precautions should be taken when installing a small rolling mill?
Strict requirements apply when installing small rolling mills, as they do for rolling equipment in general—but there are still numerous differences between small mills and other types of machinery, making careful attention essential during installation. Due to the complexity of the electrical control systems in small rolling mills, which typically include one or more working stands along with their drive mechanisms, rolling lines often feature extended process layouts. Additionally, precise height differences between equipment and the central line are critical during setup.
2021-12-01
Steel Rolling Mill: The Purpose of a Steel Rolling Mill
There are two main types of steel rolling mills: cold rolling and hot rolling. Hot rolling is primarily used for roughing out the initial billets, while also producing certain types of structural steel. Notable models of hot-rolling mills include the 630–650 series, the 500–550 series, and the 2300 mid-plate mill. On the other hand, cold rolling is mainly employed for finishing and producing a wide variety of rolled strip products. Representative cold-rolled steel products include thin metal-coated sheets (such as tinplate and galvanized sheets), deep-drawing steel sheets (most commonly used in automotive applications), electrical silicon steel sheets, stainless steel, and coated steel sheets. Currently, advancements in both equipment technology and control systems are driving cold-rolling mills toward even higher levels of precision and efficiency. Examples of modern cold-rolling mill models include the 1400mm NKW, the 1250mm HC single-stand reversible mill, and the 1150mm twenty-roll cold-rolling mill.
2021-11-01
The Structure of a Short-Stroke Rolling Mill
With the development of the steel industry and rising customer demands for higher steel quality, the requirements for rolling mills are becoming increasingly stringent. Short-stress rolling mills stand out for their high rigidity, superior product precision, lightweight design, and ease of operation—particularly thanks to their innovative "on-line rapid mill changeover" feature, which has positioned them as a leading choice in steel rolling operations, especially in domestic bar and wire rod plants. Short-stress line rolling mills can broadly be categorized into frame-type and non-frame-type designs.
2021-10-08
Summary of the causes of heat generation in various parts of the steel rolling mill production line!
On the steel rolling mill production line, many equipment units—such as flying shears, pinch rolls, and low-voltage compensators—have adopted asynchronous variable-frequency drive systems for their transmission mechanisms. Once the magnetic field reaches saturation, the iron core becomes saturated, causing the no-load current to rise and, consequently, increasing the motor's heat generation. As a result, during summer months, companies often have to halt production for several hours each day just to allow the motors to cool down. This significantly disrupts the rolling mill’s output and inadvertently leads to substantial production cost losses. When the rolling mill processes steel, the motor speed naturally decreases, causing the stator current to surge by 10–22% above its rated value. Frequent overloading not only intensifies motor heating and overheating but can also, in some cases, lead to excessive resistance torque—potentially even stalling or burning out the motor altogether.
2021-09-01
Contact Us
Address: No. 2, Jingdong Industrial Development Zone, Sanyuan District, Sanming City, Fujian Province
Mobile app
Message
* Note: Please provide accurate information and ensure smooth communication—we’ll get in touch with you as soon as possible.