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4-Hi Reversing Rolling Mill
1. Advantages of 4-hi reversible rolling mill
A single stand reversible four roll precision mill,the working roll of the mill has a positive or negative bending plate shape adjustment. The operation and maintenance are simple and the cost of investment is low. It is especially suitable for the rolling of mid-width metal strip.
2. Coiling parameters
2.1 Raw materials
Raw materials | |
Texture of material | Metal and Alloys |
Material Thickness | Max3.5mm |
Material Width | Max850mm |
Inside Diameter | 508mm |
Outer Diameter | 900-2000mm |
Material Weight | Max20Ton |
2.2 Finished product
Finished product parameters | |
Finished Thickness | 0.50-0.15mm |
Coil Width | Max850mm |
Inside Diameter | Φ508mm |
Outer Diameter | Φ900-2000mm |
Coil Weight | Max20Ton |
3. Main technical parameters of the rolling mill
Mill Specification | Four rolling mill reversible |
Maximum Rolling Pressure | Non - Standard (width, thickness, material properties) |
Rolling Speed | Max800m/min |
Coiling Tension | Max50Ton |
Mill Speed Precision | 1% |
Tension Precision（FS） | The dynamic fluctuations in the value of less than 4%. Steady state: fluctuations in the value of less than 1.5% |
Bending Force | Non - Standard (width, thickness, material properties) |
Hydraulic Drive System | 12Mpa |
Bending System Pressure | 16Mpa |
AGC System Pressure | 21Mpa |
4. Equipment configuration
4.1 Mechanical equipment
No. | Device name | Unit | Quantity | Note |
1 | Uncoiler | Set | 1 | Custom |
2 | Pinch straightener | Set | 1 | Custom |
3 | Entrance side coiler | Set | 1 | Custom |
4 | Entrance side platform | Set | 1 | Custom |
5 | Rolling mill housing | Set | 1 | Custom |
6 | Rolling mill drive | Set | 1 | Custom |
7 | Exit side platform | Set | 1 | Custom |
8 | Exit side coiler | Set | 1 | Custom |
9 | Rolls | Set | 1 | Custom |
10 | Bending and balancing device | Set | 4 | Custom |
11 | Oil removal unit | Set | 2 | Custom |
12 | Tension testing | Set | 2 | Custom |
13 | Turning roll | Set | 2 | Custom |
14 | Roll changing device | Set | 1 | Custom |
4.2 Motor、electronic control and instrument system
No. | Device | Unit | Quantity | Specification |
1 | Uncoil Motor | Set | 1 | AC OR DC |
2 | Mill Motor | Set | N | AC OR DC |
3 | Coil Motor | Set | N | AC OR DC |
4 | （Siemens PLC） | Set | 1 | SIEMENS |
5 | （AGC） | Set | 1 | SIEMENS PLC |
6 | (Gauge) | Set | 1 | AMC |
4.3 Fluid equipment
No. | Device | Unit | Quantity | Specification |
1 | Low pressure hydraulic station | Set | 1 | Custom |
2 | AGC hydraulic station | Set | 1 | Custom |
Screw-down cylinder | Set | 2 | Custom | |
3 | Process lubrication system | Set | 1 | Custom |
4 | Gear oil lubrication | Set | 1 | Custom |
5 | Oil mist collection & purification system | Set | 1 | Custom |
6 | Automatic fire extinguishing system | Set | 1 | Custom |
5. Characteristics of rolling mill
5.1 High rigidity and high precision；
5.2 Bending；
5.3 Four pyramid hydraulic collapsible drum；
5.4 Passline auto adjusting；
5.5 High Speed：0-800m/min；
5.6 Working mode：reversible rolling；
5.7 Hydraulic AGC control： constant tension control；
5.8 Mileage management of roll；
5.9 Siemens PLC control, AC and DC drive control；
5.10 Dynamic seal deoil, oil removal effect: residual 350mg/m2。
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