High Precision 20 High Cold Rolling Mill For AHSS SUS Steel (750)
High Precision 20 High Cold Rolling Mill For AHSS SUS Steel (750)
20-high cold rolling mill for production of the stainless steel precision strip as well as high-strength carbon steel strip, copper, copper alloys, and special materials in perfect quality.
20Hi cold rolling mill undoubtedly is the optimum solution of thickness reducing for hard deformation alloy strips such as stainless steel strip.
The 750mm 20Hi mill proposal is made as per the marketing requirements of finished product and feasible machine configuration, which can guarantee producing all the required product sizes in stability at economical cost and thus good profit.
The technical characteristics of the 20Hi Mill:
- the mill stand is a whole structure of strong rigidity(the design rigidity coefficient 440-490T/mm), good for controlling metal plate thickness precision.
- the roller convex adjusting is more flexible and convenient, for the outer backup rollers are backup bearing type.
- the rolling line height can be flexibly adjusted by F,G rollers.
- axial transfer of middle rollers help plate edge shape control.
- cooling oil is supplied to lubricate rollers via guide plates in good lubrication performance.
- easy operation and maintenance and safe running.
- stable rollers system: hundreds of 20Hi mills around the world don’t happen rollers unstable problem. Moreover, small work roller diameter can reduce plate to very thin degree.
Rollers of 850 20High Cold Mill:
| Metal strip materials: |
| Stainless steel ； |
| Silicon steel W400-W1300; |
| After HR and pickling, or intermediate annealing |
| Coil ID: 570 mm； |
| Coil OD: max 1800 mm B56 |
| Coil weight: max 10,000 kg |
| strip thickness: 0.3 - 0.8mm； |
| strip width: 550 - 750 mm； |
| Finished product specification: |
| Coil ID: 570 mm； |
| Coil OD:max 1800 mm (include gasket carton and reel mandrel)； |
| Coil weight: max 10,000 kg (include gasket carton and reel mandrel)； |
| Finished Strip thickness:0.05- 0.5mm； |
| Strip width: 550 - 750 mm； |
| Finished product precision: |
| Thickness difference in longitudinal direction(in stable rolling): |
| ＜±0.003mm(d<0.5mm) ＜±0.6%d(d³0.5mm) |
| Machine parameters: |
| Max rolling force: 3500KN； |
| Max line speed: 800 m/min； |
| Threading speed: 20 m/min ； |
| Thickness reduction: |
| Max up to 90% thickness reduction(varying as per steel strip properties) |
| Recoiling tension: 180 -18 kN v <400 m/min |
| 90 -9 kN 400m/min≤ v <800 m/min |
| Work roller diameter φ40mm； |
| First middle roller diameter φ70mm； |
| Second middle roller diameter:φ130mm； |
| Backup bearing roller diameter: φ225 |
| Uncoiling mandrel diameter: F540～F580mm(round F570mm) |
| Recoiling mandrel diameter: F540～F570mm(round F570mm) |
| Max opening gap between work rollers: 4.735mm (at the time of max work roller diameter) |
| Hydraulic systematic pressure for press-up hydraulic cylinder:25 Mpa |
| Hydraulic pressure for roller bending, middle roller transferring,balance, side pushing: 21Mpa |
| Normal hydraulic pressure:10Mpa； |
| Recoiling motor: AC 1250KW x 2sets； |
| Main mill motor: AC 1250KW； |
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