120(140)/450/450 4-high Reversing Cold Mill
Description
Two types: revering and non-reversing, suitable for secondary rolling and finish rolling of common straight carbon steel, alloy steel stainless steel, copper and aluminum strips. Back-up roll transmission with rigid frame, special bearing and screw down worm gear with secondary enveloping surface.
Structure
It is composed of main motor, gear reducer, double helical spur gear, universally-jointed axle, support, working seat, power screw down gear, left and right draw-works, hydraulic station and DC electric control. Material of backing roll: 9Cr2Mo
Technical Data
| Max. press | 3000KN | Mode of transmission | Backing-roll transmission |
| Entry size | 2.5×380 | Final size | 0.2×380 |
| Cross section of frame | 250×300 | Window size | 550×1680 |
| Size of working roll | Φ120(140)×450 needle roller bearing | Size of backing roll | Φ450x450 FCD bearing |
| Main motor | Z4 | Motor for screw down gear | YZ211Kw |
| Rolling speed | 100m/min for special steel and 180 m/min for common straight carbon steel | Speed of screw Dow gear | 0.058mm/s |
| Gear reducer | ZLY | Worm gear for screw down | A=315 |
| Double helical spur gear | A:690; Mn=12 | Weight of main frame | Approx.31.5 t |
| Recoiler(alternative) | Hydraulic or solid | dimension | 4980×2400×3000 |
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