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Additional info:
3.1.1 Hot feeding roller table
Usage: This roller table is used to receive hot continuous casting billets from the continuous casting workshop and transport them to the front roller table of the furnace due to continuous casting failure. Suitable for simultaneous transportation of multiple steel pieces.
Type: AC collective transmission
Roller specifications: φ 350x1500mm
Roll pitch: 1000 mm
Roll surface elevation: (tentative) approximately+1750
Roller surface linear speed: 0-1.2m/s
Number of rollers: tentatively 25 pieces
Transmission motor: variable frequency motor 55KWx3
Structural features: The thickness of the roller track assembly is 30mm. The upper surface of the pavement board is 30mm lower than the upper surface of the roller.
3.1.2 Cold feeding channel
Usage: This roller table is used to receive continuous casting billets transported by the crane and transport them to the front of the furnace. Suitable for simultaneous transportation of multiple steel pieces.
Type: AC collective transmission
Roller specifications: φ 350x1500mm
Roll pitch: 1000mm
Roll surface elevation: (tentative) approximately+1750
Roller surface linear speed: 0-1.2m/s
Number of rollers: tentatively 11 pieces
Transmission motor: variable frequency motor 55KWX1
Structural features: The wall thickness of the roller table is 30mm. The upper surface of the roller deck is 30mm lower than the upper surface of the roller.
3.1.3 Furnace roller table
Usage: This roller table is used to receive continuous casting sent by the cold or hot feeding roller table, and to cooperate with the pusher to send the steel into the heating furnace
Type: AC collective transmission
Roller specifications: φ 350x1500mm
Roll pitch: 1000mm
Roll surface elevation: (tentative) approximately+1750
Roller surface linear speed: 0-1.2m/s
Number of rollers: tentatively 22 pieces
Structural features: The thickness of the roller track is 30mm. The upper surface of the pavement board is 30mm lower than the upper surface of the roller.
3.1.4 Hydraulic steel pushing machine (provided by the user)
3.1.5 Lifting baffle
Purpose: Arranged in the front and back of the furnace roller table, respectively, to block the damage of hot feeding steel billets and cold feeding steel.
Structural features: Hydraulic lifting, the baffle is composed of a baffle, a buffer, a cylinder, and a fixed base.
3.1.6 Furnace slide frame (provided by the user)
Usage: Connect the roller track in front of the furnace and the furnace slide rail, support the slab to slide into the heating furnace under the thrust of the pusher. Adopting a cast frame structure.
3.1.7 Fixed baffle
Purpose: To prevent steel from running improperly.
Structural features: The fixed baffle is composed of a baffle, a spring, and a fixed base.
3.1.8 Discharging roller table
Purpose: Used to receive steel from the heating furnace and transport heated continuous casting billets. Type: AC collective transmission
Roller specifications: φ 350x600mm
Roller surface linear speed: 0-1.2 m/s
Number of rollers: 12
Electric motor: AC variable frequency 55kw, 1 structural feature:
Collective transmission, circulating water cooling inside the bearing seat, and roller body cooling. The upper surface of the roller deck is 30mm lower than the upper surface of the rollers, and the rollers are made of solid forged steel, with a total of 1 group.
3.1.9 Steel withdrawal roller table
Purpose: Transport and store steel billets that have failed heating. Type: AC motor driven separately
Roller specifications: φ 295x600mm
Roller surface linear speed: 0-1.2 m/s
Number of rollers: 10
Electric motor: AC variable frequency 4 kw×10
Structural features: separate transmission. The roller table has no planking.
3.1.10 Steel blocking device
Purpose: To prevent steel damage from sliding out of the heating furnace, absorb its impact energy, and prevent equipment damage. Structural features: The steel blocking device consists of a baffle, a spring, and a fixed base.
The rear buffer spring is compressed and then retracts to stop the movement of the slab.
3.2. Equipment in the roughing mill area
3.2.1 Descaling Collection
Roller specifications: φ 295X600
Roll pitch: 1000 mm
Roll surface speed: 0-1.2m/s
Number of rollers: 8 pieces
Motor: AC variable frequency 4KW 8 units
Roller structure feature: separate transmission.
3.2.2 Transport roller table before rough rolling
Roller specifications: φ 295X600
Roll pitch: 1000 mm
Roller speed: 0-1.2m/s
Number of rollers: 11 pieces
Motor: AC variable frequency 4KW, 11 units
Roller structure feature: separate transmission.
3.2.3 Rough rolling front guide
Purpose: Used to guide steel damage into the E1 rough rolling vertical roller mill.
3.2.4 E1 rough rolling vertical roller mill
Usage: Roll the heated steel together with a horizontal machine to form intermediate billets with a thickness of 30-35mm. Form: upload dynamic
Rolling temperature 1100 ° C
Rolling pressure 1500 KN
Opening degree (maximum smooth roller) 200-480mm
Pressing speed (unilateral pressing/opening) 0-22-30mm/s
Roll specifications φ 650/ φ 600x380mm
Main transmission motor DC 260 KW 1 set
Pressing method: Long stroke hydraulic pressing AWC+SSC control
Structural features: The vertical roll mill adopts closed prestressed frame, and the main drive adopts the up drive type. The motor drives two rolls through the main reducer cross universal joint Shaft-driven bicycle, and the AWC+SSC is controlled by hydraulic pressure. The roll changing frame is moved out from the hydraulic side to change the roll. The reducer has a hard tooth surface to ensure no oil leakage.
3.2.5 E2 rough rolling vertical roller mill
Purpose: Rolling the heated steel together with a horizontal rolling mill to form a 30-35mm thick intermediate billet.
Form: upload dynamic
Rolling temperature 1100 °
Rolling pressure 1200 KN
Opening degree (maximum smooth roller) 200-480mm
Pressing speed (single pressing/opening) 0-22-30mm/s
Roll specifications φ 650/ φ 600x380mm
1 main drive motor DC 350KW
Pressing method: Long stroke hydraulic pressing AWC+SSC control
Structural features: The vertical roll mill adopts closed prestressed frame, and the main drive adopts the up drive type. The motor drives two rolls through the main reducer cross universal joint Shaft-driven bicycle, and the AWC+SSC is controlled by hydraulic pressure. The exchange frame is moved out of the hydraulic side for exchange. The reducer has a hard tooth surface.
3.2.6 R1-R4 rough rolling two silver horizontal rolling mill
Purpose: To form continuous rolling by combining the heated plate with the vertical roller mill, rolling intermediate billets with a thickness of 30-35mm
Form: Two roll irreversible
Rolling pressure 6000 KN
Maximum opening 200 mm
Pressing type hydraulic AGC
Pressing speed 0-20-35mm/s
Roll specifications φ 690/ φ 630x600mm
Roller material: ZG70Mn2
Main motor: R1DC1250×1 units
R2-R4 DC1800 ×3 units
The roll changing device mainly consists of a sliding seat device, a track, a push pull hydraulic cylinder, etc. The reducer used for the rough rolling mill adopts a hard tooth surface, and the lubrication of the tooth surface and bearings are reliable to ensure that the equipment does not leak oil during operation.
3.2.7 Connecting beam and guide rail of rough rolling mill
Structure: The inlet guide and outlet guide are respectively set on the inlet and outlet sides of each rolling mill, which can be pulled out and fed in by hydraulic pressure. There is a hydraulic cylinder on both sides of the inlet guide opening, and a magnetic ruler is installed inside the hydraulic cylinder, which can adjust the opening degree hydraulically.
3.2.8 Transport roller table after rough rolling
Purpose: Used for transporting steel damaged ends to the finishing mill. Type: AC machine with separate transmission
Roller specifications φ 295x600mm
Roll spacing 1000mm
Number of rollers 52
Speed 0-2 m/s
About 51 motors with AC frequency conversion of 4KW
- List of Main Parameters of Rolling II Equipment
Layout form of precision rolling mill: 1 vertical and 1 horizontal 1 (2hi)--1 horizontal 2 (2hi) -- 2 vertical and 1 horizontal 3 (2hi)—1 horizontal 4 (2hi), 1 horizontal 5 (4hi), 1 horizontal 6 (4hi), 1 horizontal 7 (4hi), 1 horizontal 8 (4hi).
4.1 1 # vertical roller mill JL1 φ 550 * 200
Motor: Z4-355- 4AP = 254KWU = 440VI = 628A 220V
Speed n=746/1500r/min
Reducer: A =1200i=4.025
4.2 horizontal 11 # 2hi rolling mill φ 520 * 530
Motor: Z710- 4BP = 1250KWU=660VI=1609A
N=320/700r/min
Gear seat: A=500
Reducer: A =1200i1=6.818
4.3 horizontal 2- horizontal 3 2 # and 3 # 2hi rolling mills φ 520 * 530
Motor: Z710- 4BP = 1000KWU=660VI=1609A
N=320/700r/min
Gear seat: A=500
Reducer: A= 1200i2=i3=5.654, i4=2.457
4.4 horizontal 4 4 # 2hi rolling mill φ 520 * 530
Motor: Z710- 4BP = 1000KWU=660VI=1609A
N=320/700r/min
Gear seat: A=500
Reducer: A=700i4=2.457
4.5 2 # vertical roller mill JL2 φ 500 * 115
Motor: Z4-315- 4AP = 159KWU=440VI=395A
N=776/1800r/min
Reducer: A=850 i=8.20
4.6 5-6 # 4hi rolling mill: back up roll: φ 520 * 600 * 1894
4hi work roller: φ 335 * 630 * 1745
Motor: Z710- 4BP = 1000KWU=660VI=1609A
Speed n=320/700r/min
Gear seat: A=320
Reducer: A=700, i5=1.689i6=1.420
4.7. 7-8 # 4hi rolling mill: back up roll: φ 520 * 600 * 1894
4hi work roll: φ 335 * 630 * 1745
Motor: Z710- 4BP = 1000KWU=660VI=1609A
Speed n=320/700r/min
Gear seat: A=320i7=1i8=1
4.8. Pinch part
Pinch device φ 450x550
4.9. Vertical bevel gear reducer
Speed ratio 1.833
Motor YTSP280S-6
Speed 1000r/min
Power 45KW
Insulation B
4.10. Snake oscillator
cam mechanism
Swing angle: ± 30 ° Opening: 460x30
4.11. Vertical bevel gear reducer
Speed ratio: 2.27
Motor Y160M-6 Power: 7.5KW Current: 17.0A
Speed: 970r/min Insulation B
4.12. Flat conveyor chain 2.0x42.35m
4.13. Reducer ZL1000
Centre-to-centre distance: 1000 Speed ratio: 35.5
4.14 Motor Z4-250-41 Power: 110KW Voltage: 440V Current: 282A
Speed 750-1606r/min
Insulation: F
4.15 Feeding roller φ 450x450
4.16 Reducer speed ratio: 2.27
4.17 Motor Y200L-4 Power: 30KW Current: 56.8 Speed: 1470r/min Insulation: B
4.18 Five roll tension machine φ 300x550
Hydraulic cylinder diameter: 300x550 Oil pressure: 25MPa Stroke: 160mm
4.19 Vertical recoiler φ 500x360
Strip steel temperature: 400-600 ° C thickness: 1.8-5mm width: 145-400 coil weight: 1500kg coil speed: 0-4.7-9.3m/s
4.20 Reducer spiral bevel gear
Z1=15Z2=50 Speed ratio: 3.33M=12
4.21 Motor Z4-250-21
Power: 90KW Voltage: 440V Current: 234A
Speed 750/2250r/min
Insulation: F
Magnetic voltage: 180V Excitation current: 16.1A
4.22 Hydraulic station for recoiling
4.22.1. Hydraulic station oil pump 80CY14-1B
4.22.2. Motor Y180L-4 power: 22KW
4.23 Rolling lubrication station
4.23.1. Oil pump KCB-55
4.23.2. Motor Y90L-4 power: 1.5KW speed: 1400r/min
- Project name: Two sets of flat conveyor
- (Single equipment) Main technical parameters:
- Head to tail Centre-to-centre distance 70 meters
- Plate width 3 meters
- Chain belt pitch 320mm
- Sprocket pitch diameter φ 836.2mm
- Number of sprocket teeth 8 teeth
- Operating speed 0.2~2m/s
- Motor Z4-315-21 N=185kw
- Reducer ZSY560 i=35.5
Ⅲ Range
- 2 sets of head sprocket assembly (including head wheel, shaft, bearing seat, and base)
- 2 sets of tail and tensioning devices (including shaft, tail wheel, bearing seat, tensioning device, and base)
- 2 sets of transmission assembly (including motor, reducer, coupling, base, etc.)
- Chain belt assembly 446 sections ×2
- Cover plate 446 sections ×2
- Complete set of racks
- Track (43 # steel rail) 278 meters×2
- Complete set of side shields
Ⅳ. Materials and performance of main components
- The head and tail sprockets ZG40Mn are normalized and the surface of the teeth is quenched, with a service life of no less than 3 years.
- The head and tail shafts are made of high-quality 40Cr steel, quenched and tempered, with a service life of no less than 2 years.
- The chain plate is made of 65Mn, quenched and tempered, with a service life of no less than 2 years.
- The cover plate adopts HT200-400, with evenly distributed relief holes and reinforced ribs. There are transition chamfers on both sides of the cover plate, and the surface is flat and smooth. Thermal deformation, fracture, etc. are not allowed during operation.
- The roller shaft is made of high-quality 45 # steel, the shaft sleeve material is 40Cr, and the shaft end has oil injection holes, with a service life of no less than 2 years.
- The roller is made of high-quality 45 # steel forgings, quenched and tempered with high-frequency quenching on the surface, and equipped with bearings inside the roller, with a service life of no less than 2 years.
- The bearings are made of three famous products: Harbin, Wa, and Luo.
- The inner chain plate of the chain belt roller should be relatively stationary with respect to the position of the shaft to prevent shaft wear, which is a key assessment.
- The connecting bolts between the cover plate and the chain should be appropriately strengthened and enlarged to prevent wear and deformation of the bolt holes of the cover plate during work. This key assessment is to be conducted. Electric control and automation. Manufacturer: Musco.
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