4 Hi 4 High Reversible Cold Rolling Mill Machine For Metal Strips
Automatic Reversible Cold Rolling Mill is different from tandem continuous rolling mill, the metal strip forward or reverse run through rolling mill to reduce strip thickness by number of rolling passes, to-and-fro passes can be up to 5 or 6 until the metal thickness reaches up to finished gauge.
Reversible cold rolling mill is suitable for
- 1) high precision thin metal strip rolling
- 2) Annual prodution of Cold rolled metal product is not highly required.
Features of reversible rolling mill:
- Metal coil strip materials can be carbon steel, stainless steel, copper, bronze, aluminum, nickle, silver, titanium alloy, etc.
- The reversible rolling mill can be 2 high, 4 high, 6 high, 8 high, 12 high, 18hi, 20 high
- Reversible cold rolling requires to and fro rolling in stable, uniform and precise status, the manufacturing precison of rolling mill must be good.
- Thickness reducing control of reversible mill can be mechanic screw down or hydraulic AGC screw down, required by application, speed and precision of cold rolled metal
- Two coilers sit each side of the reversible rolling mill while reducing thickness of metal coil strip, to provide coiling tension and wind metal strip up.
- The drive motor of reversible mill rotate FWD or REV, automatically controlled by motor controller and PLC
700 four roller (4 high) reversible cold rolling mill.
| steel material | hot rolled normal carbon steel, without pickling or shelling, annealed cold rolled coil(CRCA) |
| Incoming coil strip | 450-600mm x 2-3mm |
| Incoming coils | 508mm ID, 1800mm OD, 10T |
| Cold rolled finished SS coil strip | 450-600 x 0.60-1.5mm |
| Reverse Rolling mill parameters |
| Rolling mill speed | Max 200m/min, |
| Rolling force | Max 6500KN |
| Recoiling tension | Up to 80KN |
| Work roller spec. | Ф190 x 700mm |
| Backup roller spec. | Ф600 x 680mm |
| Main motor power | 700KW |
| Recoil motor power | 350KW |
| Electric control | Mechanic Screw in Jog, Siemens RA80 DC Drivers, PLC, X-ray Thickness Gauge system |
| Liquid conditions | Thin oil lubrication for gearboxes, grease for bearing seats, hydraulic station, rolling process coolant system |
| Automatic roller changing | Hydraulic motor and cylinder drive, to realize automatic roller change |
Work process:
10T Uncoiler, pinch feeder and 5 roller straightener, 1st Recoiler, 4 Hi Reversible Mill, 2nd Recoiler.
Configuration:
Configuration
1. DC motors are controlled by 6RA80 series digital DC driver,the whole line is controlled by Siemens PLC.
2. Mechanical screw press-down of rolling mill
3. Deviation adjusting of press-down
4. Safety protection such as overload protection, emergency stop in electric control system.
5. Automatic coiling tension setting and automatic constant tension control.
6. Drive work rollers, universal joints as coupling
7. Dry grease lubrication for bearing seats of rollers, press-down and universal joints
8. Automatic PLC control for whole process such as interlink of rolling process and fault alarms.
9. The rolling mill has functions: pre-setting of rolling process parameters, the inspection,display and alarm of processing parameters and machine critical parameters.
10.Two recoilers and 4hi mill realize Reversible rolling
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4 Hi 4 High Reversible Cold Rolling Mill Machine For Metal Strips Images
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