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6 Hi Reversing Cold Rolling Mill

EQUIPMENT MAIN FUNCTION 
This product is used for reversely rolling the high precision and good quality normal carbon steel, stainless steel strips and low alloy steel. 

EQUIPMENT COMPONENT AND FEATURE
Uncoiler, Hydraulic coil car and unloading car, 5 Roll pinch flattener, Entrance and exit platform, Rolling mill, Left and right recoiler, Joint gear box, Hydraulic AGC and bending roll system, Driving  motor, Electric control system, Equipment lubrication and process lubrication system.

    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.

    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. 

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