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φ350/φ1100×1400 Technical specification of four rollersreversingcoldmillunit

Ⅰ. Technological condition

1. Specification of incoming material

Material: aluminum and aluminum alloy

Thickness: 8.0-0.2mm

Width: 900-1200mm

Inside diameter of strip coil: φ508

Outside diameter of strip coil: φ1500

Maximum weight of strip coil: calculate by the density of aluminum alloy  t

2. Specification of finished product

Thickness:  0.20-1.5mm

Width: 900-1200mm

Inside diameter of strip coil: φ508

Outside diameter of strip coil: φ1500

Maximum weight of strip coil: calculate by the density of aluminum alloy  t

Ⅱ. Unit Equipment Composition

The cold mill is a set of reversing cold mill unit with advanced design technology and high quality, which can produce competitive products. The unit is a complete set of automatic equipment integrated with mechanical, electrical and fluid, which is composed by charging coil truck, uncoiler, pinch straightening machine, right recoiling reel, coil unloading equipment, equipment in front of the machine, 1600mm four rollers reversing cold mill working machine, equipment behind the machine, left recoiling reel, coil unloading equipment, matched facilities for roller changing, hydraulic system (hydraulic station, equipment lubrication, technological lubrication) and instrumentation system.

Ⅲ. Technique parameter of equipment 

Specification of rolling mill: φ350/φ1100×1400mm

Maximum rolling force: 12.5MN

Maximum rolling speed: 120m/min

Uncoiling tension: 30-60KN

Coiling tension: 60-200KN

Working roller diameter × length: φ350 × 1450

Supporting roller diameter × Length: φ1100 × 1400

Maximum mouth opening of working roller: 20mm

Elevation of rolling line: +1000mm

Flow of technological lubrication: 4500L/min

Operating pressure of roller bending hydraulic system: 12-18MPa

General hydraulic transmission: 10MPa

Ⅳ. Main configures of equipment

1. Charging coil truck

Charging coil truck is composed by saddle, cross traveling trolley, cover, towline and guide rail. The lifting motion of saddle and transverse movement of the trolley are both driven by hydraulic cylinder.

a. Inside diameter of strip coil: φ508

b. Maximum outside diameter of strip coil: φ1500

c. Maximum width of strip coil: 1200mm

d. Maximum weight of strip coil: calculate by the density of aluminum alloy  t

e. Transverse distance of trolley: 3000mm

f. Lifting distance of saddle: 900mm

2. Uncoiler

The uncoiler mainly consists of reel, expanding hydraulic cylinder, rotary joints, reducer, DC motor, base, universal spindle, centering device, pressing roller device, supporting devices, movable backing device.

a. Type: hydraulic pyramid expanding type

b. Reel specification: φ508×1400mm

c. Maximum outside diameter of strip coil: φ1500mm

d. Inside diameter of strip coil: φ508mm (full circle)

e. Reel expanding range: φ480-φ520mm

f. Expanding quantum: 40mm

g. Width of strip coil: 900-1200mm

h. Maximum weight of strip coil: calculate by the density of aluminum alloy  t

i. Thickness of strip coil: 2.0-3.0mm

j. Uncoiling tension: 30-60KN

k. Maximum uncoiling speed: 60m/min

l. Motor: Z4-315-11 110KW  400/1200r/min 400V 294A

m. Axial floating quantum of reel: ±75mm

n. CPC: photoelectric detection, hydraulic driven, proportional-servo valve control

3. Pinch straightening machine

Pinch straightening machine mainly consists of pinch roller, straightening roller, companding uncoiler, motor, reducer and rack.

4. Left and right recoiling reel

Left and right recoiling reel mainly consists of reel, expanding hydraulic cylinder, rotary joints, reducer, DC motor, base, coupling, gear change mechanism, panel pushing device, belt pressing device and movable backing device.

a. Type: hydraulic pyramid expanding type with hydraulic opening

b. Reel specification: φ508×1400mm

c. Maximum outside diameter of strip coil: φ1500mm

d. Inside diameter of strip coil: φ508mm (full circle)

e. Reel expanding range: φ488-φ508mm

f. Expanding quantum: 20mm

g. Width of strip coil: 900-1200mm

h. Maximum weight of strip coil: calculate by the density of aluminum alloy  t

i. Thickness of strip coil: 0.30-2.0mm

j. Reeling tension: 60-140KN

k. Maximum reeling speed: 120m/min

l. Motor: Z560-4A 750KW  413/1200r/min 440V 1841A

m. Hard tooth face speed reducer   

5. Coil unloading truck

Coil unloading truck mainly consists of saddle, cross traveling trolley, cover, towline and guide rail. The lifting motion of saddle and transverse movement of the trolley are both driven by hydraulic cylinder.

a. Inside diameter of strip coil: φ508mm

b. Outside diameter of strip coil: φ1500

c. Width of strip coil: 1200mm

d. Maximum weight of strip coil: calculate by the density of aluminum alloy  t

e. Transverse distance of trolley: 3200mm

f. Lifting distance of saddle: 900mm

6. Main mill

The main mill φ350/φ1100×1400mm mainly consists of rack-mount, roller equipment, electric screw down gear, supporting roller balance mechanism, elevation adjusting device of rolling line, nozzle arrangement, DC motor, base, Security coupling, universal spindle and reducer casing.

(1) Rack-mount

Rack-mount mainly consists of rack, rail chair, top and bottom beam, window slide, guide rail of supporting roller, guide rail lifting device of working roller, roller changing guide rail cylinder of top working roller, fixture of spindle and roller bending system of working roller.

a. Section of rack post: 500×600mm

b. Material of rack: ZG270-500

c. Holistic processing of the window, shovel artificially, with window slide.

d. Type of axial locating of roller: supporting roller hydraulic traverse plate type

working roller hydraulic traverse plate type

(2) Electric screw down gear

a. Screw down motor: two set of Z4-200-31 45KW 119A

b. Plane double enveloping worm gear reducer

c. Screw down screws: φ350,40Cr swage

(3)Roller equipment

Roller equipment consists of top and bottom supporting roller equipment and working roller equipment, mainly including roller, bearing seat, bearing, end cover and sealing.

a. Specification of working roller: φ350×1450mm

b. Material of working roller: 9Cr2Mo (with hydraulic positive bending roller device)

c. Maximum mouth opening of working roller: 20mm

d. Specification of supporting roller: φ1100×1400

e. Material of supporting roller: 9Cr2Mo

f. Bearing lubricating method   

g. Supporting roller balance method: hydraulic balance

h. Roller changing method: assembled roller changing trolley

i. Elevation of rolling line: +1000mm

(4) Supporting roller balance mechanism

Supporting roller balance mechanism consists of balanced frame, guide slot, guide plate, saddle and balancing cylinder.

(5) Elevation adjusting device of rolling line

Elevation adjusting device of rolling line mainly consists of motor, caliper type brake, coupling, reducer, adjusting bolt and adjusting nut.

(6) Nozzle arrangement

Nozzle arrangement is the final outlet of technological lubricant, which is provided for the lubrication and cooling of the surface of roller.

(7) Main motor

Type: Z560-4A  750KW  413/1200r/min 440V  1841A parallel connection of the two sets

(8) Security coupling consists of safety pin, inside sleeve gear, outside sleeve gear, which is a gear coupling.

(9) Universal spindle

The rolling mill adopts working roller transmission, the transmission adopts universal spindle SWC350

(10) Reducer casing

Reducer casing mainly consists of case, gear, spindle and bearing.

a. Hard tooth surface

b. Class of accuracy: 6HK

c. i=4

7. Equipment in front of the machine

 Equipment in front of the machine consists of guide and guard devices in the middle front of the machine, oil removal plant, hydraulic cutter, right steering feeding device and thickness tester rack.

Thickness tester: QNT-Ⅱtype isotope ray thickness tester

8. Equipment behind the machine

Equipment behind the machine mainly consists of oil removal device, left steering feeding device, hydraulic cutter and thickness tester rack.

Thickness tester: QNT-Ⅱtype isotope ray thickness tester

9. Roller changing device

Roller changing device consists of roller changing machine of supporting roller, roller changing truck of working roller and lifting cover.

(1) Roller changing machine of supporting roller mainly consists of track, track seat, hook, base, supporting frame, hydraulic cylinder. When changing the roller, pull out the bottom supporting roller from hydraulic cylinder, then hang the supporting roller frame on the bottom supporting bearing seat, using hydraulic cylinder to push bottom supporting roller device and supporting frame into rack window, laying bottom supporting roller to balance the oil cylinder, falling the top supporting roller device on the supporting frame, at last using hydraulic cylinder to pull the top and bottom supporting roller and supporting frame together. Opposite steps will be done when assembled.

(2) Changing roller truck of working roller consists of lock device, tractor, transmission device, big carriage, roller changing carriage track, transition carriage, fixed carriage, proximity switch and hydraulic piping.

(3) Lifting cover consists of cover, lifting device and guide slot. Lifting cover lies in front of the main mill. When changing the roller, fall the cover by lifting device, using roller changing oil cylinder of supporting roller to pull the cover under the roller changing carriage of working roller, then do the operation of roller changing. After the roller changing, put the lifting cover to the original place in order for the convenience operation of the mill.

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