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High Precision Reversing Cold Rolling Mill for Steel Strips - Factory & Suppliers in China

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MAIN FUNCTION OF THE EQUIPMENT
This advanced machinery is designed for the reverse rolling of high-precision, high-quality normal carbon steel, stainless steel strips, and low alloy steel, making it an essential tool for manufacturers seeking reliable production solutions in the metal industry.

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COMPONENTS AND FEATURES OF THE EQUIPMENT
Our rolling mill features a robust set of components including an Uncoiler, Hydraulic coil car and unloading car, 5 Roll pinch flattener, and Entrance and exit platforms. The system also includes left and right recoilers, a joint gearbox, hydraulic AGC and bending roll systems, a powerful driving motor, an advanced electric control system, as well as dedicated equipment lubrication and process lubrication systems. As a leading China supplier of rolling mill machinery, our factory ensures top-notch quality and performance to meet the needs of our clients.

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    The Theory of Six Roll Rolling Mill

    Six roll rolling mill adds a pair of middle roller that can move symmetrically and axially, eliminating the harmful contact between working roll and support roll. During milling, for different width of steel strips will use different movement amount of middle roll, change the contact pressure distribution (flattening value distribution) between rollers and bending force, so to control the plate shape and convexity.

    The Theory of Six Roll Rolling Mill

    Product Introduction

    The six-high reversing cold rolling mill is a high-precision metal rolling equipment, mainly used for multi-pass rolling of strip materials at room temperature to achieve thickness reduction, plate shape control and surface quality improvement.

    The core feature of this equipment lies in its six-high structure design and reversible rolling function. It consists of six rolls including work rolls, intermediate rolls and backup rolls, among which the intermediate rolls can move axially (oscillate), and the work rolls are equipped with hydraulic bending roll devices. This design can effectively adjust the pressure distribution between the rolls and improve the accuracy of plate shape control; the reversible rolling function allows the strip to be rolled back and forth in the mill, ensuring thickness uniformity.

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    High Precision Rolling accuracy up to ±0.02 mm for superior quality output.
    High Efficiency Rolling speed ranges from 360 to 1000 m/min.
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    Strong Adaptability Compatible with stainless steel, common steel, aluminum and copper.
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    Wide Thickness Range Reduces raw material from 1.5–4.5 mm down to 0.15–2.0 mm finished gauge.

    The six-high reversible cold rolling mill is characterized by high precision, strong adaptability and high efficiency. It is suitable for various materials such as stainless steel, common steel, aluminum and copper, and can roll raw materials with thicknesses ranging from 1.5 to 4.5 mm into thin-gauge finished products with thicknesses ranging from 0.15 to 2.0 mm. The rolling accuracy can reach ±0.02 mm, and the rolling speed is usually 360 to 1000 m/min. The equipment is often integrated with hydraulic systems, automatic control systems and auxiliary devices (such as uncoilers and thickness gauges) to achieve automated operation.

    Typical application scenarios include cold rolling lines for strip steel and deep processing of metal materials. For example, a 1400 mm specification equipment has a maximum rolling force of 12000 kN, suitable for wide strip rolling, and is widely used in the automotive, home appliance, energy and other industries for the demand of high-precision metal strips.

    Technical Parameter Table

    MILL MODEL / TECHNICAL PARAMETER 950 1150 1380
    Material carbon steel and low alloy steel carbon steel and low alloy steel carbon steel and low alloy steel
    Material thickness (mm) 2.0~3.5 2.0~4.0 2.0~4.0
    Material width (mm) 600~850 900~1050 1000~1250
    Finish thickness (mm) 0.5~0.15 0.5~0.16 0.5~0.18
    Pressing force (KN) 9000 13000 15000
    Support roll Specification (mm) Φ800×920 Φ1050×1120 Φ1100×1350
    Middle roll Specification (mm) Φ350/Φ320×900 Φ380/Φ350×1150 Φ380/Φ350×1350
    Working roll Specification (mm) Φ260/Φ235×950 Φ310/Φ280×1150 Φ280/Φ255×1380
    Driving method Working roll driving Working roll driving Working roll driving
    Main motor DC 1250KW×2 DC 1000KW×4 DC 1250KW×4
    Speed reducer Joint gear box Joint gear box Joint gear box
    Uncoiler (specifications) Φ610×950 Φ610×1150 Φ610×1380
    Recoiler (specifications) Φ508×950 Φ508×1150 Φ508×1380
    Rolling speed (m/min) 800 900 900
    Uncoiler tension (KN) 45 70 70
    Recoiler tension (KN) 9~90 14~140 17~170
    Pressing method Hydraulic AGC Hydraulic AGC Hydraulic AGC
    DC speed regulator Siemens 6RA70 Siemens 6RA70 Siemens 6RA70
    Electric Control Siemens PLC Siemens PLC Siemens PLC

    ⓘ Remark: the model and parameter shown in this table are for reference only. The design and production can be tailor-made according to user's requirements.

    Frequently Asked Questions

    Q What is the main advantage of a six-high rolling mill over a four-high rolling mill?
    The six-high rolling mill adds a pair of intermediate rolls that can move axially, which eliminates the harmful contact between the working roll and the backup roll. This allows more precise control of the contact pressure distribution and bending force, resulting in better plate shape control, improved convexity management, and higher dimensional accuracy compared to a conventional four-high mill.
    Q What materials can be processed by the six-high reversing cold rolling mill?
    The six-high reversing cold rolling mill is suitable for a wide range of metal materials, including stainless steel, carbon steel, low alloy steel, aluminum, and copper. This strong adaptability makes it widely applicable across multiple industries such as automotive, home appliances, and energy.
    Q What thickness range can this equipment achieve?
    The six-high reversing cold rolling mill can process raw materials with input thicknesses ranging from 1.5 to 4.5 mm and reduce them to finished product thicknesses as thin as 0.15 to 2.0 mm. The rolling accuracy can reach ±0.02 mm, ensuring consistent and high-quality output.
    Q How does the reversible rolling function work and what are its benefits?
    The reversible rolling function allows the strip material to be rolled back and forth through the mill in multiple passes without needing to transfer the coil to another machine. This ensures uniform thickness distribution across the strip length, reduces setup time, and improves overall production efficiency, especially for thin-gauge products.
    Q What control systems are integrated into the six-high rolling mill?
    The equipment is integrated with a Hydraulic AGC (Automatic Gauge Control) pressing system, Siemens 6RA70 DC speed regulators, and Siemens PLC electric control systems. These advanced control systems enable automated operation, precise thickness control, and reliable process monitoring throughout the rolling process.
    Q Can the six-high rolling mill be customized to meet specific production requirements?
    Yes. The technical parameters listed in the specification table are for reference only. The design and production of the six-high rolling mill can be fully tailor-made according to the user's specific requirements, including mill width, rolling force, motor power, roll specifications, and auxiliary equipment configurations.