Three Stands Tandem Cold Mill Line For HRPO Steel Coils
650 Three Stands tandem cold rolling mill continuously reduce steel plate thickness at up to 250m/min from 2-3mm to 0.6-1.5mm, steel strip width ranges 450-550mm, the continuous rolling process output large scale cold rolled steel coil of good quality flatness and high tolerance in thickness control.
The competition of the tandem mill is continuous one way from uncoiling to coiling without stop, so, automatic shear and welding machine, strip accumulator keep the continous process while changing coil, double recoilers are good option to improve production.
Layout process:
Hydraulic coil loading car, uncoiler, Five-roller straightening machine, Welding and cutting, horizontal spiral accumulator, input processing platform, four stands 4 roller rolling Mill, output processing platform, Re coiler, coil discharging car.
Parameters:
| Input coil strip material | Q195, Q235, 08AL |
| Input coil strip gauge and width | 2.0-3.0mm x 550mm |
| Output coil strip gauge and width | 0.6-1.2mm x 550mm |
| Coil weight | Max 8T |
| Number of rolling stands | Three |
| Max rolling force of each stand | ≤600T |
| Max exit rolling speed | 250m/min |
| Coiler tension | ≤65KN |
| Work roller dimensions | φ175×650 mm |
| Backup roller dimensions | φ600×630 mm |
| Hydraulic AGC system pressure | Max 21Mpa |
| Hydraulic AGC cylinders | φ480mm x 70mm, 2pcs |
| Main motors | 430KW x 3ets DC 1000rpm |
| Coiler motor | 355KW DC 1400rpm |
| DC motor control | Siemens 6RA80 |
| Electric control system | Thickness gauge 3sets,
tension meter 2sets,
Siemens PLC, MCC cabinets
MTS displacement sensor, etc. |
Tandem cold mill is high productivity, requiring:
- Huge power supply and consumption, high efficiency cold mill can save power and control rolling process cost.
- Emulsified water for rolling process cooling needs a big pool with filtering system to keep enough clean coolant.
- Electrc control cabinets and panels are high precision programming and reaction system to ensure high speed precision rolling.
- Tension cell synchronize the rolling speed and tension between two mills.
- Operator must be skilled to run the mill
- Thickness gauges are necessary to control sheet gauge.
- Thin oil lubricating system for gearboxes of mill and recoiler.
Two Coilers Option:
strip head comes to one coiler, belt wrapper holds the head and wraps it onto coiling mandrel, the steel strip start coiling up on the mandrel, speed up the coiling speed until maximum stable speed, when the coil tail welding seam comes close to the coiler, slow down the mill line, cut off the strip after tail welding seam.
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Three Stands Tandem Cold Rolling Mill Line For HRPO Steel Coils 650 Images
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