JP3217612B2 - Slab guide roll segment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slab guide roll segment used in a continuous casting facility, and more particularly to a flow direction of a slab continuously cast with a roll interval provided opposite to an upper and lower frame. The present invention relates to a slab guide roll segment that can be adjusted in a tapered shape along the axis.

[0002]

2. Description of the Related Art As is well known, in continuous casting equipment, the profile of a slab guide roll disposed on both sides in the flow direction of a slab is such that the roll interval becomes smaller toward the downstream according to the heat shrinkage of the slab. It is generally performed to provide a taper so that, and in order to improve the quality of the slab, to apply pressure to the slab by tapering the roll interval along the moving direction of the slab. preferable. As such a slab guide roll segment, Japanese Utility Model Publication No. Sho 62-45807 (conventional example 1) filed by the present applicant and Japanese Utility Model Publication No. Sho 64-42758 (conventional example) also filed by the present applicant. 2)
And Japanese Utility Model Application Laid-Open No. 64-15647 (conventional example 3). Hereinafter, these conventional slab guide roll segments will be described.

[0003] First, a slab guide roll segment according to prior art 1 disclosed in Japanese Utility Model Publication No. Sho 62-45807 discloses a slab of FIG. As shown mainly in FIG.
An upper frame 113 supporting a plurality of upper rolls 110A, 110B, 110C, 110D, 110E is supported at the upper part of a tie rod 114 through spherical seats 119, 120, 122, 123, and the upper roll is slightly tapered. In order to provide the upper frame 113, the upper frame 113 can be inclined. In this case, upper rolls 110A, 110B,
110C, 110D, 110E and lower roll 111A, 111B, 111C, 111D,
To adjust the distance between the roll to 111E and the low rolling reduction relative to the slab, a screw threaded under the tie rod 114 is used.
The worm wheel 132 screwed to 114a is driven.

[0004] A slab guide roll segment according to Conventional Example 2 disclosed in Japanese Utility Model Laid-Open Publication No. 64-42758 is an improvement of the slab guide roll segment of Conventional Example 1 described above. As shown in FIG. 6 which mainly shows the shaft portion, an upper frame supporting a plurality of upper rolls (not shown) via a cylinder device 112 above the screw shaft 108.
104, so that a reduction can be easily applied to the slab. In this case, similar to the above conventional example,
The worm wheel 117 screwed to the screw 103 threaded below the screw shaft 108 is driven to adjust the roll interval between the upper roll and the lower roll, while the cylinder device 11
2 is operated to adjust the amount of reduction for the slab.

Finally, a slab guide roll segment according to prior art 3 disclosed in Japanese Utility Model Laid-Open Publication No. 64-15647 is
A column connecting the four corners of the lower frame and the upper frame is provided, a side frame slidably fitted to the column and movable between the lower frame and the upper frame is provided, and an intermediate frame is provided inside the side frame. Provided,
The cylinder device with position control is arranged at four places inside the column connecting position of the upper frame, and the piston rods are connected to the intermediate frame, and the trunnions provided on both sides of the intermediate frame are rotatable to the side frames. The connection adjusts the gap between the rolls between the intermediate frame and the lower frame in a tapered shape along the transport direction of the cast slab.

[0006]

In the slab guide roll segment according to the prior art 1 or 2 described above, the upper frame and the lower frame are connected via four tie rods to adjust the roll interval to a tapered shape. Since the upper frame is moved up and down together with the tie rod with respect to the lower frame by the feed screw mechanism connected to the tie rod, the structure becomes large and complicated. Further, since the feed screw mechanism receives loads from the upper roll unit, the upper frame, the tie rods, and the like, the feed screw mechanism is large in size to raise them against the load. This means that, in order to improve the quality of the slab, in the slab guide roll segment that applies pressure to the slab by tapering the roll interval along the moving direction of the slab, a large pressure is applied from the slab. Therefore, the increase in the size of the mechanism was further spurred.

Further, in the slab guide roll segment according to the conventional example 1 or the conventional example 2, since the upper frame moves up and down together with the tie rod, it is not easy to set the roll interval to a predetermined position. This means that in order to improve the quality of the slab, it is necessary to frequently adjust the roll interval in the slab guide roll segment in which the roll interval is tapered along the moving direction of the slab and pressure is applied to the slab. It was a problem because there was.

On the other hand, in the slab guide roll segment of the conventional example 3, when the roll interval between the intermediate frame and the lower frame is adjusted in a tapered shape along the slab transport direction, the tilting operation of the intermediate frame is impossible. Although there is an advantage that can be eliminated, the cylinder with position control for raising and lowering the intermediate frame becomes a relatively large cylinder due to the load of the intermediate frame, the upper roll unit and the left and right side frames, so the mechanism also becomes large, and the roll There is a problem that it is not easy to set the interval at a predetermined position.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide a simple and compact structure which can easily adjust the roll interval between upper and lower rolls into a tapered shape. An object of the present invention is to provide a slab guide roll segment capable of withstanding pressure from a slab such as a static pressure or a correction reaction force and having a buffer function when receiving an abnormal force from the slab.

[0010]

In order to achieve the above object, a slab guide roll segment according to the present invention comprises a fixed frame above a lower frame to which a lower roll is attached, opposed to the lower frame. The fixed frame is provided with a double rod type hydraulic cylinder in which a rod is movable in a vertical direction, and an upper frame having an upper roll mounted on one of the rods of the hydraulic cylinder is attached to the fixed frame. By attaching a stroke regulating member that regulates the stroke of the hydraulic cylinder to the other end, the roll interval between the upper and lower rolls can be adjusted .
On the other hand, the lower frame and the fixed frame are
Are connected by side plates erected on both sides of the
The trunnion shaft protrudes from the center of both ends of the
The on-axis moves up and down and rotates in a groove formed in the upper center of the side plate
A slab guide roll segment which is housed as possible .

Also, a lower frame with a lower roll attached thereto.
A fixed frame is installed above the
The rod can be moved up and down on the fixed frame.
Provided with a double rod type hydraulic cylinder
Upper frame with upper roll attached to one of both rods
The hydraulic cylinder and attach the front to the other of the two rods of the hydraulic cylinder.
Stroke regulation that regulates the stroke of the hydraulic cylinder
By attaching a member, the roll of the upper and lower rolls
While the distance can be adjusted, the stroke regulating member
Is a screw drilled in the other of the two rods of the hydraulic cylinder
And a nut to be screwed into the screw.
A gear is attached to the upper end surface concentrically with the rod axis.
The drive means for rotating this gear is fixed frame
Slab guide roll segment provided on
G.

Also, a plurality of upper rolls are mounted on the upper frame.
May be attached.

Further, a structure in which one upper roll is attached to one upper frame may be adopted.

[0014]

SUMMARY OF] According to the present invention, a double rod type hydraulic cylinder, since the roll gap of the vertical rolls is adjustable by a stroke limiting member is subjected to a double rod type <br/> hydraulic cylinder By operating the hydraulic pressure and the stroke regulating member, the roll interval between the upper roll and the lower roll can be easily adjusted in a tapered shape. Further, the mechanism can be made compact. In addition, the hydraulic pressure applied to the double rod type hydraulic cylinder not only can counteract the pressure from the slab such as the molten steel static pressure and the correction reaction force, but also performs a buffer function when receiving an abnormal force from the slab. be able to. Ma
In addition, a structure using side plates instead of the
Therefore, it is easy to obtain rigidity.
The machine width on the right can be made more compact. In addition,
Raising and lowering the runion shaft into the groove formed in the upper center of the side plate and
The trunnion shaft is attached to the side plate
Smooth up and down by sliding up and down inside the concave groove of
Can be.

According to the second aspect of the present invention, the double rod type hydraulic
And the upper and lower rolls by a stroke control member.
The double-rod type
Operate the hydraulic pressure applied to the hydraulic cylinder and the stroke regulating member.
Making it easy to remove the row between the upper and lower rolls.
Can be adjusted in a tapered shape. In addition, compact mechanism
Can be In addition, double rod type hydraulic syringe
Slabs such as molten steel static pressure and straightening reaction force
Not only can withstand the pressure from
It can perform a buffering function when subjected to an excessive force. Ma
In addition, both of the hydraulic cylinders are used as the stroke regulating members.
A screw drilled on the other side of the rod, and a nut screwed into the screw
And a simple and lightweight mechanism for storage.
Work can be regulated. Further, a lower end surface of the nut is
The gear is mounted concentrically with the
Drive means for rotating the
So that the straw is easier and lighter
Can regulate traffic.

According to the third aspect of the present invention, a plurality of upper frames are provided.
Since the upper roll is attached, the entire roll segment
Can be configured more compactly.

[0017]

[0018]

According to the fourth aspect of the present invention, one upper roll is one.
Since it is attached to two upper frames, the interval between the rolls can be adjusted independently and individually, and the adjustment of the roll interval can be precisely adjusted in a short time.

[0020]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a slab guide roll segment according to the present invention, and FIG. 2 is a side view of FIG.

Reference numeral 1 denotes a lower frame mounted on a base frame 2, on which four lower rolls 3 are mounted, and positioning is provided on the left and right (based on the direction of transport of the slab) side surfaces. A side plate 6 is fixed upright with the pins 4 and the bolts 5. The side plate 6 is made of a thick steel plate and has a concave groove 7 formed in the upper center thereof. A liner 8 is fixed to the inner surface of the concave groove 7 by bolts.

Reference numeral 9 denotes an upper frame, on the lower surface of which are mounted four upper rolls 10 opposed to the lower roll 3, and on the upper surface thereof, four rod-type hydraulic cylinders, which will be described later, at four front, rear, left and right positions. A bracket 11 for rotatably mounting the lower rod 20 is mounted on the lower rod 20. Further, a trunnion shaft 12 having a square cross-sectional shape at the tip is protruded from the center of the left and right side surfaces thereof. A liner 13 whose outer side is formed in a circular arc is fixed to a pair of parallel surfaces at the front end of the pair by bolts. The upper frame 9 is rotatable by the arc surface of the liner 13 by slidably storing the arc surface of the liner 13 in the liner 8 in the concave groove 7 of the side plate 6.

Numeral 14 designates a fixed frame having its left and right ends mounted on the upper end surface of the side plate 6 and fastened by bolts 15 and nuts 16. Is installed. The double-rod hydraulic cylinder 17 includes a lower rod 20 and an upper rod 21 above and below a piston 19 in the cylinder 18, respectively, and has an upper oil chamber A above the piston 19 and a lower oil chamber B below. I have. The lower rod 20 is inserted and attached to a through hole 22 formed in the main body of the fixed frame 14, and the lower part thereof is rotatably pin-connected to the bracket 11 attached to the upper surface of the upper frame 9. ing. On the other hand, the upper rod 21 has a male screw portion 23 formed on an upper portion thereof, and a nut 24 is attached thereto.

Numeral 25 denotes a driving device for rotating the nut 24. The driving device 25 is mounted on a bracket 26 provided at the center of the left and right rod-type hydraulic cylinders 17 with the output shaft up and down. Attach the hydraulic motor 27, this motor 27
A pinion 29 is connected to the output shaft of the motor through a coupling 28, and a pin 30 is provided on the pinion 29 above the nut 24.
A gear 31 coupled to a nut 24 is meshed.

Next, the procedure for adjusting the interval between the rolls 10 and 3 provided opposite the upper and lower frames 9 and 1 in the slab guide roll segment having the above configuration will be described.

First, the hydraulic pressure in the upper oil chamber A of the right and left rod type hydraulic cylinders 17 on the side to be adjusted is released, and a predetermined hydraulic pressure is applied to the lower oil chamber B. As a result, the lower surface of the nut 24 is
Move away from the top of 18. Next, the hydraulic motor of the driving device 25
When 27 is driven, pinion 29 rotates and nut 24
Rotates. The nut 24 rotates until it comes into contact with the cylinder 18, at which point the stroke of the piston 19 becomes the stroke limit. During this adjustment work, the oil pressure in the lower oil chamber B
Since the function of maintaining its own weight of 10 or the like is achieved, the torque of the drive device 25 can be reduced.

After the completion of this work, the drive of the hydraulic motor 27 is stopped, the hydraulic pressure in the lower oil chamber B of the right and left rod type hydraulic cylinders 17 is released, and a predetermined oil pressure is applied to the upper oil chamber A. The predetermined oil pressure applied to the upper oil chamber A receives the molten steel static pressure and the correction reaction force from the slab. When an abnormal pressure is applied from the slab, the predetermined oil pressure applied to the upper oil chamber A performs a buffer function.

In the above embodiment, an example was described in which the cross-sectional shape of the tip of the trunnion shaft 12 was square, but the present invention is not limited to this example. It is sufficient that one set of parallel surfaces is formed in the portion, and the other surface may be formed in an arc shape. Also,
A conventional combination of a cylinder and a bearing may be used.

A driving device for rotating the nut 24
Although the example in which the drive device 25 is used has been described, the drive device 25 may be manually rotated without being assembled. Further, even when the driving device 25 is used, an electric motor may be used instead of the hydraulic motor 27. The hydraulic motor 27 and the pinion 29 of the drive device 25
Alternatively, a hydraulic cylinder and a rack may be employed.

Next, a slab guide roll segment according to a second embodiment of the present invention will be described with reference to FIG. 3 showing an overall side view thereof and FIG. 4 showing a partial cross-sectional upper detailed view thereof. Reference numeral 51 denotes a slab guide roll segment, and a plurality of upper rolls 54 and lower rolls 55 (seven in this figure) are arranged in parallel and vertically opposed positions, and each of these upper rolls 54 , The upper frame 53 which will be described later.
Are individually supported by this upper frame 53,
As shown in FIG. 4, it is supported so as to be able to move up and down by a hydraulic cylinder 56 having a configuration described later. The hydraulic cylinder 56 is fixed via a lower flange portion 56f to a fixed frame 52 in which a cross beam member 52b is laid on the top of a pair of support members 52a.

The hydraulic cylinder 56 has a lower rod 56c which extends downward through a vertically opened through hole provided in the cross beam member 52b of the fixed frame 52, and has a piston
The upper oil chamber 56d is on the upper side separated by 56a, and the lower oil chamber 56e is on the lower side.
have. That is, the lower end of the lower rod 56c of the hydraulic cylinder 56 is rotatably connected to the upper frame 53 via the bracket 57, and the upper frame 53 is vertically movable by the hydraulic cylinder 56. Further, the hydraulic cylinder 56 has an upper rod 56b formed by threading a male screw portion at the upper end, and a nut 66 for limiting the amount of movement of the piston is provided on the male screw portion of the upper rod 56b. It is screwed.

The upper flange 56g of the hydraulic cylinder 56
Is provided with a hydraulic motor 61.
A wide drive gear 63 is connected to the output shaft 61 via a coupling 62 so as to be freely reversible around a vertical axis.A driven gear 64 meshes with the drive gear 63. Below the driven gear 64, a plurality of pins 65 slidably connected to the nut 66 are extended, and the forward and reverse rotation of the hydraulic motor 61 causes the nut 66 to rotate forward and reverse. You. The width of the drive gear 63 is set to a width that can reliably mesh with the driven gear 64 in the range in which the upper rod 66b moves up and down. Also, the nut 66 and a plurality of pins
The reference numeral 65 indicates that these pins 65 are slidably connected to engagement holes (not shown) provided in the nut 66 so that the nut 66 can be raised and lowered without any trouble. In the second embodiment, the hydraulic motor 61 is used for driving. However, it goes without saying that the present invention is not limited to the hydraulic motor 61, and may be replaced with, for example, an electric motor with a reduction gear.

Next, the procedure for adjusting the interval between the upper and lower rolls 54, 55 in the slab guide roll segment of the second embodiment will be described. First, the oil pressure in the upper oil chamber 56d is released, and the oil pressure is applied to the lower oil chamber 56e. When the hydraulic motor 61 is driven in this state, the driven gear 64 is rotated via the drive gear 63,
Since the nut 66 is rotated via the pin 65, the nut
The 66 is moved up and down according to its rotation direction. When the nut 66 is rotated by a predetermined amount, the drive of the hydraulic motor 61 is stopped,
Nut 66 is held in its stopped position. On this occasion,
Since the piston 56a is raised by the hydraulic pressure applied to the lower oil chamber 56e, the nut 66 can be rotated without receiving any pressure. Therefore, the torque of the hydraulic motor 61 is
A small torque sufficient to rotate the nut 66 is sufficient.

With the positioning of the nut 66,
The lowering amount of the upper roll 54 is limited. That is, the lower oil chamber 56
The upper roll 54 is lowered by releasing the oil pressure of e and applying the oil pressure to the upper oil chamber 56d, but the lowering of the upper roll 54 is performed by the nut 66 mechanically contacting the upper flange 56g of the hydraulic cylinder 56. The amount is mechanically limited. At this time, an abnormal upward force transmitted from the slab to the upper roll 54 is absorbed by the oil pressure in the upper oil chamber 56d. When setting the roll interval, although not shown, the upper roll
A detachable spacing piece is interposed between the upper and lower bearing housings supporting both ends of the lower roll 55 and the lower roll 55, and the degree of contact between the upper and lower bearing housings and the spacing piece is checked by a pressure sensor.

As described above, each of the seven upper rolls 54 is individually set by the respective hydraulic cylinders 56 to form the lower roll 55.
It is configured to be positioned with respect to. Therefore, unlike the conventional slab guide roll segment, it is not necessary to adjust the screwing amount of the nut to incline the upper frame, and to adjust the distance between the seven upper rolls 54 and the lower roll 55 of the slab guide roll segment 51. Can be adjusted in a short time to a roll interval suitable for the steel type, which can greatly contribute to an improvement in the efficiency of production of slabs (not shown) of different steel types by the continuous casting machine.

By the way, the pressure of the slab is reduced by the hydraulic cylinder 56.
The operation is performed by supplying hydraulic oil to the upper oil chamber 56d and keeping the oil pressure in the upper oil chamber 56d constant. At this time, if an abnormal acting force is transmitted from the slab side to the upper roll 54, the oil pressure in the upper oil chamber 56d resists the rise of the upper roll 54, thereby preventing the slab guide roll segment 51 from being damaged. can do.

In the above, the case where the upper frame 53 is moved up and down by one hydraulic cylinder 56 to keep the roll interval between the upper roll 54 and the lower roll 55 constant has been described as an example. It may be supported by a pair of hydraulic cylinders provided at both ends of the upper frame. In this case, the driven gears may be synchronously driven by drive gears meshing with the driven gears provided on the upper rods of the pair of hydraulic cylinders.

Further, the embodiment shown in FIG. 1 shows an example in which a plurality of upper rolls are supported by a plurality of hydraulic cylinders, and the embodiment shown in FIG. 3 shows an example in which one upper roll is supported by one hydraulic cylinder. However, it goes without saying that the present invention can be implemented even if one upper roll is supported by a plurality of hydraulic cylinders.

[0039]

As described above, the slab guide roll segment according to the present invention has a fixed frame provided above a lower frame to which a lower roll is attached, facing the lower frame, and a rod is provided on the fixed frame. Is provided with a double rod type hydraulic cylinder movable in the vertical direction, an upper frame having an upper roll mounted on one of both rods of the hydraulic cylinder, and the hydraulic cylinder stroke mounted on the other of the two rods of the hydraulic cylinder. Since the roll interval between the upper and lower rolls can be adjusted by attaching a stroke regulating member that regulates the distance between the upper roll and the lower roll, the roll interval between the upper roll and the lower roll can be easily adjusted in a tapered shape. Further, the mechanism can be made compact. In addition, the hydraulic pressure applied to the double rod type hydraulic cylinder not only can counteract the pressure from the slab such as the molten steel static pressure and the correction reaction force, but also performs a buffer function when receiving an abnormal force from the slab. be able to.

[Brief description of the drawings]

FIG. 1 is a front view of a slab guide roll segment according to the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is an overall side view of a slab guide roll segment according to a second embodiment of the present invention.

FIG. 4 is a cross-sectional upper detail view of a part of a slab guide roll segment according to a second embodiment of the present invention.

FIG. 5A is a conventional example 1 (Japanese Utility Model Publication No. Sho 62-45807).
FIG. 5B is a view showing a slab rolling state of the slab by the slab guide roll segment according to the present invention, and FIG. 5B is a view mainly showing a tie rod portion of the slab guide roll segment.

FIG. 6 is a view mainly showing a screw shaft portion of a slab guide roll segment according to Conventional Example 2 (Japanese Utility Model Application Laid-Open No. 64-42758).

[Explanation of symbols]

1: Lower frame 2: Base frame
3: Lower roll 4: Positioning pin 5: Bolt
6: Side plate 7: Groove 8: Liner
9: Upper frame 10: Upper roll 11: Bracket 1
2: Trunnion shaft 13: Liner 14: Fixed frame 1
5: Bolt 16: Nut 17: Double rod hydraulic cylinder 18: Cylinder 19: Piston 2
0: Lower rod 21: Upper rod 22: Through hole 2
3: Male thread 24: Nut 25: Drive 2
6: Bracket 27: Hydraulic motor 28: Coupling 2
9: Pinion 30: Pin 31: Gear
A, B: Oil chamber 51: Slab guide roll segment 52: Fixed frame 52a: Support member 52
b: Cross beam member 53: Upper frame 54: Upper roll 5
5: Lower roll 56: Hydraulic cylinder 56a: Piston 56
b: Upper rod 56c: Lower rod 56d: Upper oil chamber 56
e: Lower oil chamber 56f: Lower flange 56g: Upper flange 5
7: Bracket 61: Hydraulic motor 62: Coupling 6
3: Drive gear 64: Drive gear 65: Pin 6
6: Nut

Continued on the front page (56) References JP-A-52-72327 (JP, A) JP-A 52-162217 (JP, U) JP-A 64-15647 (JP, U) (58) Fields investigated (Int) .Cl. ⁷ , DB name) B22D 11/128 310

Claims (4)

(57) [Claims] 1. A fixed frame is provided above a lower frame to which a lower roll is attached, facing the lower frame,
The fixed frame is provided with a double rod type hydraulic cylinder in which a rod is movable in a vertical direction, and an upper frame having an upper roll attached to one of the rods of the hydraulic cylinder is attached to the other of the two rods of the hydraulic cylinder. The lower frame and the fixed frame can be adjusted by attaching a stroke regulating member that regulates the stroke of the hydraulic cylinder to the lower frame and the fixed frame.
And are connected by side plates erected on both sides of the lower frame
Then, insert the trunnion shaft into the center of both sides of the upper frame.
And a trunnion shaft formed in the center of the upper part of the side plate.
A slab guide roll segment, which is accommodated in a groove so as to be able to move up and down and rotate . 2. A fixed frame is provided above the lower frame to which the lower roll is attached, facing the lower frame,
The fixed frame is provided with a double rod type hydraulic cylinder in which a rod is movable in a vertical direction, and an upper frame having an upper roll attached to one of the rods of the hydraulic cylinder is attached to the other of the two rods of the hydraulic cylinder. By attaching a stroke regulating member that regulates the stroke of the hydraulic cylinder to the roller gap between the upper and lower rolls can be adjusted , the stroke regulating member
A screw drilled in the other of the two rods of the pressure cylinder,
And a nut that is screwed onto the nut.
Install the gear concentrically with the rod axis and
A drive means for rotating the
A slab guide roll segment, characterized in that: 3. A plurality of upper rolls are mounted on an upper frame.
The slab guide roll segment according to claim 1, wherein the slab guide roll segment is provided. 4. An upper roll is attached to an upper frame.
The slab guide roll segment according to claim 1, wherein the slab guide roll segment is provided.