Top angle 45 degree heavy-duty special steel finishing mill

1. Quantity: 1 set
   of special steel type (patent No. ZL201420797399.2) centralized transmission 10 vehicles, each pair of rollers is 45 degrees to the horizontal plane, two adjacent vehicles are perpendicular to each other, roller ring type, 1 1600KW/set DC electric motor, average elongation coefficient 1.18. The reduction ratio of the gearbox is calculated based on the base of 700 revolutions per minute of the motor.
2. Location: The finishing rolling unit is arranged after the clamping shear.
3. Function: Through continuous micro-tension rolling of 10 heavy-duty Morgan-type units, the rolled piece delivered by the upstream rolling mill is rolled into a finished wire rod of Φ5~Φ11mm.
4. Composition: The unit is composed of 10 rolling mills, and the 10 rolling mills have a structure of 8″×5+6×
5. Form: It adopts a symmetrical arrangement in the form of a positive 45-degree angle at the top, the overall center of gravity of the rolling mill is low, and the force is symmetrical and even, which ensures the stability of the equipment operation.
6. Incoming material specification: maximum Φ
7. Incoming material temperature: ≥850℃
8. Finished product specifications: Φ5~Φ11mm
9. The exit speed of the 10th frame: 25m/s (rolling Φ5 specification smooth disc round)
10. Rolling mill form: cantilever roll ring type, imitating Morgan VI heavy-duty model
11. Transmission motor: DC 1600kw 1 set
12. Motor speed: 500-1000r/min
13. Unit lubrication method: Thin oil centralized lubrication
14. Opening method of protective cover: hydraulic pressure
15. Roll ring loading and unloading method: hydraulic pressure

Finishing mill structure

The roll box adopts a plug-in structure, and an eccentric sleeve mechanism is installed in the box to adjust the roll gap. The eccentric sleeve is equipped with an oil film bearing and a roller shaft, and the roller ring is fixed by a tapered sleeve at the end of the roller shaft. The bevel gear box is composed of a box body, a transmission shaft, a spiral bevel gear pair, and a synchronous gear pair. All gears are hard-tooth surface grinding gears, the tooth surface is modified, the tooth root is strengthened, and the precision is grade 5. Correction processing to ensure long-term high-speed and smooth operation. The roll box and the bevel gear box are directly connected by bolts, and part of the roll box box extends into the bevel gear box during assembly, so that the roller shaft gears are respectively meshed with two synchronizing gears in the bevel gear box. All gears are hard-tooth surface ground gears, tooth surface modification, tooth root strengthening treatment, precision level 5. The roller box and the bevel gear box are positioned by two positioning pins, and the roller boxes of the same specification can be interchanged. The spacing of the roll shafts changes the roll gap as the eccentricity of the eccentric sleeve moves symmetrically relative to the rolling line, and keeps the original rolling line and the position of the guide unchanged. Oil film bearings and rolling bearings are Morgan type special bearings. The roller ring is made of tungsten carbide.

Front clipping shear of finishing mill

1. Quantity: 1
2. Form: Pneumatic;
3. Shear section: <Φ13mm;
4. Maximum shear force: 52KN

Horizontal looper in front of finishing mill

1. Quantity: 1
2. Function: Pneumatic lifting, photocell non-contact scanning measurement;
3. Starting range: 0~450mm

Water tank and guide groove after finishing rolling

1. Location: Arranged behind the finishing mill.
2. Function: Make the steel enter the collecting device through the guide groove
3. Type: upper and lower part type.
4. Overall length: about 8m

Coiler

1. Quantity: 2
2. Equipment use: It is used to hot-coil Φ10~Φ25mm round steel into coils for storage and transportation.
3. Working principle: The motor starts, and the power is transmitted to the main shaft through the coupling and a pair of bevel gears. The main shaft rotates and drives the ejector device to rotate together through the pin rod. In the annular space of the pin rod, driven by the ejector plate, the steel is rolled into a coil with a diameter of Φ850mm~Φ After a coil is completed, the motor stops working, the cylinder piston of the ejector device extends, and pushes the ejector shaft to push the ejector chassis together with the coil to be flush with the large platform surface. After that, the piston rod of the pusher cylinder extends, the pusher arm pushes the coil to the coil collection area, and the cylinder piston retracts to prepare for the next work, thus completing a coiling task.
4. Equipment technical parameters (part)
   1. Incoming Specifications: Φ 12~ Φ 25mm
   2. Incoming speed: 4-8m/s
   3. Coil size (inner and outer diameter): Φ850mm~Φ1000mm
   4. Coiling temperature: 800℃~900℃
   5. Main motor model: DC motor
   6. Main motor power: 160kW
   7. Main motor speed: 1500r/min
   8. The curling speed is not less than 20M/S
   9. Pinch roller material: high speed steel (W6)
   10. Lubrication method : The main gearbox is lubricated by thin oil pools in all four places. The lubricating oil surface of the gearbox must not exceed the gear teeth of the bevel gear. The temperature rise of the lubricating oil should not exceed 15 ° The lubricating oil is: L-CKC220, and check regularly. Check the oil level of the lubricating oil and add oil in time to ensure that the oil level of the oil pool is normal, and replace the oil pool lubricating oil regularly according to the usage.

Pinch roll and laying head unit

pinch roller

1. Function: Feed the wire into the laying machine. According to the process requirements, the wire is clamped to the head, tail or the whole process.
2. Type: horizontal cantilever roller double roller drive, pneumatic clamping.
3. Equipment composition: motor, gearbox, crank linkage, two swing arms, etc.
4. Features: The pinch roller is driven by a DC motor via two-stage cylindrical gears. The two pinch roller shafts are respectively installed on the two swing arms, and the cylinder drives the upper and lower rollers to clamp simultaneously through a set of crank linkage mechanism. In order to prevent the wire from being clamped flat, the clamping force can be adjusted. There is an adjustable limit device to adjust the maximum opening of the pinch roller and the minimum center distance between the two rollers to ensure that the two rollers do not collide. The pinch roller housing is a welded structure, the gears and bearings are lubricated with thin oil, and the pinch roller shaft adopts oil film bearings and high-speed rolling thrust bearings.

Laying machine

1. Function: Used to turn the wire into a coil and put it on the conveying roller table of the loose coil cold conveyor
2. Type: 20 degree angle horizontal
3. Equipment composition: spinning pipe installed on the rotating mandrel, transmission device, casing, etc.
4. Structural features: The rotating mandrel is driven by a speed-regulating motor through a pair of bevel gears. The spinneret rotates at a set speed to spit out a coil that meets the required outer diameter. The rotating mandrel of the laying machine is composed of two parts: a spinning tube and a hollow shaft. The spinning head is used to fix the spinning tube, and the hollow shaft is in the transmission box and driven by a bevel gear. A conduit is inserted in the center of the interior, and a water-cooling sleeve is installed between the conduit and the hollow shaft to cool the conduit, and at the same time prevent the high temperature of the rolled piece from being transmitted to the bearing on the hollow shaft. The outer casing of the cover is a cylindrical structure, which is also arranged obliquely to play a protective role. Its upper part can be opened by hydraulic cylinder control, so as to facilitate the operation when replacing the spinning tube. The upper housing is closed during normal operation.

Cooling Roller

1. Type and function: Roller chain drive conveyor, which transports the wire to the collection drum in the form of loose coils.
2. Total length of air-cooled roller table: about 6.6M
3. Form: roller chain drive conveyor, single-segment independent drive

Collection, transportation, storage

When the coil is transported to the end of the conveyor, it falls into the coil collection barrel at the end of the roller table. The collecting reel is equipped with a ring cloth device. After the discs are collected, the separation melon is opened, and the discs automatically fall into the annealing tank (provided by the owner). After the annealing tank is full, it is moved to the hoisting station by the running trolley, unloaded by the workshop crane, and sent to the annealing furnace for storage.