JPS6018494B2 - Roll changing device in vertical rolling mill - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Continuous slab casting machines have low productivity due to their slow casting speeds.

In order to increase this productivity, it is necessary to
It is necessary to cast with a coil width of 30 mm and a width of 180 mm to 200 mm), and a large width reduction must be performed before entering the existing hot strip mill (the coil width is often around 80 mm to 150 mm). is an absolute condition. In order to apply this large reduction, a sizing mill that combines a vertical rolling mill and a horizontal rolling mill is used, and the present invention relates to a roll rearranging device for rearranging the rolls of the vertical rolling mill of the sizing mill. be. The rolls of the vertical rolling mill are caliber rolls, and due to their structure, they are subject to severe wear due to differences in circumferential speed of the roll surfaces, so it is necessary to replace the rolls every few days.

However, if the continuous slab casting operation is interrupted every time the rolls are replaced, productivity cannot be improved.

Therefore, in order to improve productivity, it is necessary to replace the rolls without interrupting the continuous casting operation.

The present invention was made for the purpose of making it possible to change the rolls even when the slab is passing through the rolling mill, and to be able to change the rolls by remote control. In a vertical rolling mill that is capable of moving outward from the maximum opening position of the rolling mill, a frame having a rail extending in a direction perpendicular to the rolling direction of the rolling mill is provided on the side of the rolling mill, and the rolls are The present invention is characterized in that a carrier car, in which a beam with a hanging hook for hanging is assembled so as to be movable up and down, is mounted on the side of the rack so as to be movable back and forth along the above-mentioned rail. Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a vertical rolling mill equipped with a roll changing device according to the present invention. A spindle (not shown) supported by the inner frame and removably connected to the upper end of the ball of each left and right caliber roll 1 is meshed with the gear in the gear casing 5, and the power from the main motor 6 is transferred to the main motor 6. The transmission is transmitted to a gear in the gear casing 5 through an extension shaft 7 interposed between the gear casings 5, and the spindle is rotated to rotate the caliber roll 1, and a reduction screw 8 attached to the left and right sides of the housing 4 is connected to the frame in the housing 4 and the hydraulic sea J
Horizontal rolling is performed by connecting the rod tip of the roller 9 to the frame and moving the rolling screw 8 back and forth from the rolling electric motor 10'.
is overbalanced outward by the hydraulic cylinder 9, and when the reduction screw 8 opens outward, the opening of the caliber roll 1 increases due to the overbalance. It is configured such that it can be retreated by a reduction screw 8 from the maximum open position a at the time of the roll change to the roll change position b.

The roll changing device of the present invention comprises frame machines 11 provided at both left and right ends of the housing 4 of the vertical rolling mill having the above configuration, a carrier car 15 running along the frame side 11, and a carrier car 15 that runs along the frame side 11. It consists of an assembled rack beam 24.

The frame 11 is arranged parallel to column members 12 of a required height installed on the outer sides of both left and right ends of the housing 4 at a required interval in the rolling direction of the rolling mill, and fixed on the column members 12. The horizontal member 13 has groove-shaped rails 14 formed on opposing inner surfaces, and the tip (inner end) of each horizontal part village 13 is extended so as to reach above the housing 4 near the above-mentioned position b. It is supported by short pillar members (not shown) on the housing 4 and is configured symmetrically.

The carrier cars 15 on the left and right sides have a total of four wheels 17 on both sides that can roll on the grooved rails 14 of the foundation 11, as shown in detail on only one side in FIGS. 2 and 3. A pinion 19 for lifting and lowering the rack beam is rotatably provided approximately in the center of the car body 16, which can run on the rail 14 surface by a drive device 18, and a gear 20 fixed to one shaft end of the pinion 19. is meshed with a gear 21 fixed to the output shaft of the electric motor 22, so that the pinion 19 can be rotated in any direction via the gears 21 and 20 by driving the electric motor 22, and furthermore, on the front side of the car body 16,
A guide portion 23 extending in the vertical direction is provided. The guide portion 23 is provided with, for example, a fork-shaped latch 25 projecting from the lower part of the front surface so as to be able to engage with a hook portion 28 protruding from the upper end of the ball of the caliber roll 1, and a rack 26 on the rear side surface. Engraved rack beams 24 for raising and lowering the rolls are aligned so that they can be raised and lowered symmetrically via a sliding member 27 so as to slide smoothly, and a pinion 19 is engaged with the rack 26, The pinion 19 is driven by the electric motor 22.
The rack beam 24 can be raised or lowered by rotating forward or backward.

29 is a roll truck.

If it becomes necessary to replace Caliber Roll 1,
First, the caliber roll 1 is separated from the spindle at position a by a hydraulic cylinder (not shown), and then the rolling screw 8 is moved back and the caliber roll 1 to be replaced is rolled to the roll changing position b. Move it outside the working position.

Next, the carrier car 15, which is always on standby at position c, which is further outside the position b, is driven by the drive device 18 to run along the rail 14 of the rack side 11, and the latch at the lower end of the rack beam 24 is moved. Advance until the tip of 25 reaches position b.

At this time, the rack beam 24 is set at the lower limit position so that the latch 25 can engage with the puller part 28 at the upper end of the shaft of the caliber roll 1. Although not particularly illustrated, power is supplied to the drive device 18 of the carrier car 15 by, for example, a normal cable carrier system. When the latch 25 of the rack beam 24 for raising and lowering the roll is engaged with the hook 28 of the caliber roll 1 at the forward limit of the carrier car 15, the electric motor 22 for raising and lowering the rack beam is then moved in the direction of raising and lowering the rack beam. drive.

By driving the electric motor 22, power is transmitted to the pinion 19 through the gears 21 and 20, and the pinion 19 rotates clockwise in FIG. 2 to raise the rack beam 24. By raising the rack beam 24, the caliber roll 1 is raised together with the upper and lower roll chocks 2 and 3, and the rack beam 24 is raised by a necessary amount to a position where the lower roll chock 3 does not interfere with the housing 4. The rack beam 24 is automatically stopped at the upper limit, and then the carrier car 15 is moved back along the rail 14 to position c, which is the initial standby position, by driving the drive device 18. When the carrier car 15 finishes retreating to the standby position c, the motor 22 is driven in the direction of lowering the rack beam after stopping the retreat.

As a result, the pinion 19 is rotated counterclockwise in FIG.
Place caliber roll 1 on top of 9, then carrier car 1
5 further back to remove the latch 25 from the hook 28 at the upper end of the caliber roll shaft. The roll truck 29 is side-shifted in a direction perpendicular to the plane of the paper in FIG. Move the rack beam forward slightly and hook the hook 25 of the rack beam 24 onto the hook 28 at the upper end of the new caliber roll 1.

Next, after driving the electric motor 22 to raise the rack beam 24, the carrier car 15 is driven by the driving device 18 and advanced to position b, and at the forward limit, the rack beam 24 is lowered by driving the electric motor 22. to fit a new caliber roll into the frame inside the housing 4, then move the carrier car 15 backward, remove the hook 25 from the hook 28 at the upper end of the caliber roll shaft, and then move the carrier car 15 to the rail 14 on the rack side 11. The robot moves backward along the road and waits at position c. On the other hand, the caliber roll that has been lowered into the housing 4 is advanced to position a in FIG. 1 by advancing the shoshita screw 8, and is connected to the spindle to complete the roll change. The roll cart 29
The old caliber rolls placed on the carriage are transported to the roll shop by an overhead crane, etc., and after maintenance and repair, they are transferred to the roll trolley 2.
9 and placed on standby for the next roll change. Although the roll change has been explained for the roll on the right side of FIG. 1, changing the silk of the left roll also follows the same structural procedure.

Further, it is a matter of course that the switching operation between the forward and backward movement of the carrier car 15 and the raising and lowering of the rack beam 24 is automatically performed by detection by, for example, a limit switch. Although the example in which the carrier car 15 is self-propelled is described above, it goes without saying that a rope drive system, a Schilling drive system, or other drive system may be used. As described above, according to the roll changing device for a vertical rolling mill of the present invention, (i) the caliber roll is moved outward from the center of the mill and then pulled out from the continuous casting machine during roll changing. of material can be passed through it without interrupting the continuous casting operation, so the productivity of continuous casting can be greatly improved.

(ii) According to (i) above, the lotus fin slab does not need to be conveyed to the hot strip mill by bypassing the sizing mill, so the conveyance line can be omitted, and the investment cost associated with this can also be omitted.

(iii) Since the rolls are replaced by a dedicated roll changing device, the work is safe and reliable.

GW The carrier car, which is equipped with a roll lifting beam that can be raised and lowered, can be moved along the rails of the frame, so work can be done quickly and reliably, and the stopping accuracy is good, thus reducing the reassembly time. can be achieved.

It is possible to reduce the number of types of molds for M slab continuous casting, and it is also possible to prevent a decrease in the operating rate due to changing the width of the mold.

M Can be remotely controlled to further enhance safety.

It can produce excellent effects such as

[Brief explanation of drawings]

FIG. 1 is a front view of a vertical rolling mill equipped with a roll changing device of the present invention, and FIG. 2 is a side view of the roll changing device of the present invention, which is an enlarged view of the right side of FIG. 1. FIG. 3 is a view taken along the line mm in FIG. 2. 1... Caliber roll, 4... Housing, 8... Lowering screw, 1 1... Frame side, 14... Rail, 15... Carrier car, 16... Kiya IJ car body, 17... Wheels, 18... Drive device, 19...
・Rack beam lifting pinion, 22...Electric motor, 24...Rack beam, 25...
Latching item, 26...Rack, 29...Roll trolley. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] 1. In a vertical rolling mill in which the left and right rolls can be moved outward from the maximum opening position during rolling by a rolling device, a rail is provided on the side of the rolling mill that extends in a direction perpendicular to the rolling direction of the rolling mill. A vertical rolling mill characterized in that a carrier car is installed on the frame so as to be movable back and forth along the rail, and a carrier car is mounted on the frame so as to be movable up and down along the rail. Roll changing device.