High Quality Special Steel Cold Rolling Mill For High Carbon Steel
Good quality steel is better than plain carbon steel in properties of mechanic and processing
Including carbon steel structural steel, alloy steel, tool steel, spring steel, bearing steel, gear steel, etc.
Most good quality steel is medium high carbon steel, ASTM 1095,1075,1065,1050,yield strength 385-1080Mpa
The cold rolling process accompanied with interim Spheroidizing annealing:
- cold rolling each pass up to 20%, each time up to 50%
- two or three times annealing in bell.
- final skin pass rolling
Parameters:
| | Composition | Parameters |
| 1 | Uncoiler | 8T, φ508 x 550 CPC, 75KW |
| 2 | 2+7 straightener | φ250mm pinch, φ160mm straightener, passive |
| 3 | left recoiler | φ508 x 550mm, 350KW DC |
| 4 | Entry & Exit table | Side guide, deflector roll, thickness gauge |
| 5 | 4Hi Reverse Mill | 300 x 400 columns, φ150 x 500mm work roller, 630KW DC, φ500 x 480 backup roller, |
| 6 | Right Recoiler | φ508 x 550mm, 350KW DC |
| 7 | Coil cars | 8T, hydraulic walking |
| 8 | Hydraulic rollers changing tools | |
| 9 | Thin oil lubrication system | 4KW, 60l/min, 0.63Mpa |
| 10 | High pressure Hydraulic AGC system | 18.5KW, 60l/min, 20Mpa pressure |
| 11 | Normal pressure hydraulic system | 11KW, 60l/min, 10Mpa pressure |
| 12 | Oil gas lubricating system | |
| 13 | Emulsified coolant lubricating system | 1200l/min, 0.7Mpa |
| 14 | Electric control system | 6RA80 DC driver, S7-300 PLC, |
Control system:
Recoilers and Rolling mill DC motors are controlled by 6RA80 series DC driver, main channel adopt speed and electric current double closed loop structure, with given integrator, current pre-control functions, magnet excitation adopts potential and current double closed-loop structure.
S00 software package for recoiler DC driver can achieve tension control, recoiling diameter calculation and dynamic compensation.
The DC control system has good and reliable performance as well as best self-priority, motoring, self-diagnose, fast network functions.
The main mill control is speed control system, recoiler is speed control during threading and tension control during rolling(more exactly indirect tension control).
- Main funtions
- Main mill:
- —Manually forward or reverse rotate unitedly or singely
- —Stepless smooth speed control
- —Constant speed acceleration start or stop, speed limit and over speed protection
- —emergency stop
- —Automatic weak magnet
- Recoilers:
- —Manually forward or reverse rotate unitedly or singly
- —Stepless smooth speed control
- —Constant speed acceleration start or stop, speed limit and over speed protection
- —emergency stop
- —Automatic weak magnet
- —to start tension, the given tension can be smooth preset by computer or manual preset
- —Recoiling diameter calculation and memory
- —Compensation of inertia moment
- —Compensation of Non-load rotation loss
Product Tags:
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300m/Min Special Steel Cold Rolling Mill For High Carbon Steel Images
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