JP3170152B2 - 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 of a slab to be continuously cast with a gap between rolls provided opposite to an upper and lower frame. The present invention relates to a slab guide roll segment that can be tapered along a direction.

[0002]

2. Description of the Related Art As a slab guide roll segment, there are those proposed in, for example, Japanese Utility Model Publication No. Sho 62-45807 and Japanese Utility Model Publication No. Hei 3-37811.

In the former, the upper part of the tie rod is penetrated at the four corners of the upper frame and fixed with a spherical seat interposed therebetween, while the lower part of the tie rod is penetrated and movable at the four corners of the lower frame. And tie rods provided at the four corners, and the upper frame is raised and lowered together with the tie rods with respect to the lower frame by the feed screw mechanism connected to the tie rods on the lower surface side of the lower frame. The roll interval provided is adjusted in a tapered shape along the flow direction of the continuously cast slab.

In the latter, tie rods are integrally connected to the four corners of the lower frame, and a reduction gear of a speed reducer is fitted into the upper end of the tie rod, and the lower end of the tie rod is axially retractable into the upper end of the tie rod. A screw shaft screwed into the screw shaft, a thrust load supporting device disposed on a flange formed between an upper end portion and a lower end portion of the screw shaft, and the screw shaft is rotatable by the thrust load supporting device. A guide device that supports the upper end of the tie rod and guides the upper end of the tie rod. The guide device is integrally connected to the upper frame. The upper frame is moved up and down together with the shaft to adjust the interval between rolls provided to face the upper and lower frames.

[0005]

In the former slab guide roll segment, the roll interval can be adjusted to a tapered shape, but the upper frame and the lower frame are connected via four tie rods, and 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 provided on the lower surface side of the frame and connected to the tie rod, the structure becomes large and complicated. In addition, the feed screw mechanism is large in size because a load is applied to the upper roll unit, the upper frame, the tie rod, and the like, and particularly, these are raised against the load.

On the other hand, the latter slab guide roll segment is provided with an upper frame and a speed reducer for raising and lowering the upper frame on a screw shaft screwed into the upper end of the tie rod so as to be able to advance and retreat in the axial direction. Unlike the former slab guide roll segment, there is no need to raise and lower the tie rod, and its load is reduced, simplifying the structure of the reducer.On the other hand, the upper frame is placed between the upper end and lower end of the screw shaft. The upper frame cannot be inclined with respect to the lower frame because the upper frame cannot be tilted with respect to the lower frame because it is connected to a guide device that uses the upper end of the tie rod as a guide via a thrust load support device arranged on the formed flange. Cannot be adjusted in a tapered shape. Further, even if the upper frame can be inclined with respect to the lower frame, the reduction gear, the screw shaft, and the like are overloaded.

[0007] In both of the slab guide roll segments, a drive device for driving the speed reducer is installed on a stand equipped with the slab guide roll segment of the continuous caster. In the case of a continuous strand caster, it is possible to reduce the distance between the strands by installing a driving device outside each strand.However, when the number of strands is 3 or more, the driving device for the middle strand is in the way and the distance between the strands is reduced. And the installation space for them will be large. In addition, even with two strands, a space for installing the driving device is required.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to minimize the load applied to the lifting / lowering drive device of the upper frame and to easily adjust the roll interval to a tapered shape. It is an object of the present invention to provide a slab guide roll segment which can be formed with a narrow strand interval.

[0009]

In order to achieve the above object, a slab guide roll segment according to the present invention connects a lower frame and an upper frame via four tie rods, and includes upper and lower frames. In a slab guide roll segment in which slab guide rolls are assembled in parallel with each other facing each other, a piston formed in a cylindrical shape above a tie rod erected on a lower frame and having a screw on an upper outer peripheral surface is slid vertically. It is movably mounted, supports the upper frame via the spherical seat provided on the outer periphery of the lower part of this piston, and is screwed to the screw on the upper part of the piston to provide a worm wheel, and further on the tie rod on which the piston is mounted A fixed frame is provided for holding the worm wheel on the fixed frame and for driving the worm wheel. Those formed by providing a braking system.

In the slab guide roll segment, a flange is formed on the outer peripheral surface of the piston, and this flange is accommodated in a cylinder having a lower surface formed in a convex spherical seat, and an upper surface formed in a convex spherical seat. The head cover may be attached and sealed to form an oil chamber between the lower surface of the flange and the bottom of the cylinder, while the upper frame may be supported via the convex spherical seat.

[0011]

In the above construction, since it is not necessary to raise and lower the tie rod together to raise and lower the upper frame, the load is reduced. Therefore, simplification such as a piston mounted on the upper part of the tie rod and a worm wheel screwed to this piston is achieved. Drive mechanism can be adopted. In addition, since a driving device for driving the piston and the worm wheel is provided on the fixed frame, and the upper frame is supported through a spherical seat provided on the outer periphery of the lower part of the piston, the roll interval is continuously cast. When adjusting in a tapered shape along the flow direction, the adjustment can be easily performed without exerting a force on a driving mechanism such as a piston or a worm wheel. Further, since the driving device is provided on the fixed frame, the strand interval can be reduced.

Further, as the configuration of the spherical seat provided on the outer periphery of the lower part of the piston, a flange is formed on the outer peripheral surface of the piston, and this flange is accommodated in a cylinder whose lower surface is formed as a convex spherical seat, and the upper surface is a convex spherical seat. It is preferable that the head cover formed in the above is attached and sealed, and the oil chamber is formed between the lower surface of the flange and the bottom of the cylinder. It can be changed as required, and can overcome the static pressure of molten steel and the correction reaction force of the slab. Further, when an abnormal load is applied upward from the roll side during casting, it can be absorbed and function as a safety device.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The most preferred embodiment of the present invention will be described below with reference to the drawings. 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. 2 is an enlarged explanatory view of a part X in FIG. 1.

Reference numeral 1 denotes a lower frame mounted on a base frame 2. Four lower rolls 3 are mounted on the upper surface thereof, and tie rod fitting cylinders 4 are fixed to the four corners by welding or the like. I have. A tie rod 5 is fitted into the tie rod fitting cylinder 4, is prevented from rotating by a pin (not shown), and is fixed by a nut 6.

Reference numeral 7 denotes a piston mounted on the upper part of the tie rod 5 so as to be slidable in the vertical direction. A trapezoidal screw is formed on the outer peripheral surface of the upper part of the piston 7, and a worm wheel 8 is screwed there. Is provided. A pressure oil supply hole 10 is formed in the lower wall thickness 9 of the piston 7, and a flange 11 is formed on the outer peripheral surface thereof. The flange 11 has a cylinder 13 whose lower surface is formed in a convex spherical seat 12.
A head cover 15 having an upper surface formed in a convex spherical seat 14 is attached and hermetically sealed. An oil chamber 16 is formed between the lower surface of the flange 11 and the bottom of the cylinder 13.

Reference numeral 17 denotes an upper frame, on the lower surface of which are mounted four upper rolls 18 opposed to the lower roll 3, and through holes 19 in the four corners for mounting the tie rods 5.
Is provided, and a concave spherical seat 20 is provided on the bottom surface in the hole 19. Then, the cylinder 13 mounted on the outer periphery of the lower part of the piston 7 is inserted into the through hole 19 with the convex spherical seat 12 of the cylinder 13.
Is received and accommodated in the concave spherical seat 20, and the head cover 15
A lid 22 having a concave spherical seat 21 that engages with the convex spherical seat 14 is provided by bolting.

Reference numeral 23 denotes a nut mounted on the upper end of the tie rod 5.
A fixed frame 24 is fixed to a lower surface of which a worm wheel 8 provided on an upper outer peripheral surface of the piston 7 and a gear box 25 for accommodating and holding a worm (not shown) are fixed. A hydraulic motor 26 is attached to the center of the fixed frame 23, and its output shaft is connected to the worm via a miter gear box 27 and a transmission shaft 28. Note that, in this example, an example is shown in which the fixed frame 23 is divided and provided in the front and rear direction (the flow direction of the slab).
They may be integrated.

In the slab guide roll segment having the above structure, a hydraulic motor for driving the upper frame 17 up and down.
Since 26 is provided on the fixed frame together with the miter gear box 27, the transmission shaft 28, the worm and the worm wheel 8, the strand interval of the continuous casting machine can be reduced. Also, the upper frame 17 is mounted on the convex spherical seat 12 of the cylinder 13 and the convex spherical seat 14 of the head cover 15 mounted on the outer periphery of the lower part of the piston 7, respectively. When the roll interval is adjusted in a tapered shape along the flow direction of the slab, the drive mechanism such as the piston 7 or the worm wheel 8 is forcedly applied because the spherical seat 21 is engaged and supported. Can be easily adjusted without the need. Further, since the oil chamber 16 is formed between the lower surface of the flange 11 and the bottom of the cylinder 13, the supporting position of the upper frame 17 can be changed by adjusting the pressure oil in the oil chamber 16. In addition, while being able to overcome the normal molten steel static pressure and straightening reaction force during casting, when an abnormal load is generated upward from the roll side, it can absorb the abnormal load and function as a safety device.

In the above embodiment, the hydraulic motor 26 has been described as an example of the driving device. However, the present invention is not limited to this example, and may be an electric motor.

Further, the example has been described in which the convex spherical seats 12 and 14 are formed on the cylinder 13 for accommodating the flange 11 formed on the outer periphery of the lower part of the piston 7 and the head cover 15, respectively. Good. In this case, only the effect of the oil chamber 16 cannot be expected.

[0021]

As described above, according to the slab guide roll segment according to the present invention, since the tie rod does not need to be moved up and down to drive the upper frame up and down, the drive mechanism and the drive unit are simplified. it can. In addition, since the driving mechanism and the driving device are provided on the fixed frame, the spacing between the strands can be reduced, so that the installation space for the continuous casting machine can be reduced. Further, in addition to providing the drive mechanism and the drive device on the fixed frame, the upper frame is mounted on the piston of the drive mechanism via the spherical seat, so that the roll interval can be easily adjusted in a tapered shape.

[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 enlarged explanatory view of a portion X in FIG. 1;

[Description of Signs] 1: Lower frame 2: Base frame
3: Lower roll 4: Tie rod fitting cylinder 5: Tie rod
6: Nut 7: Piston 8: Worm wheel
9: Thick lower part 10: Pressure oil supply hole 11: Flange 1
2, 14: convex spherical seat 13: cylinder 15: head cover 1
6: Oil chamber 17: Upper frame 18: Upper roll 1
9: Through hole 20, 21: Concave spherical seat 22: Lid 2
3: Fixed frame 24: Nut 25: Gear box 2
6: Hydraulic motor 27: Miter gear box 28: Transmission shaft

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-62-127147 (JP, A) JP-A 3-91148 (JP, U) JP-A 64-49350 (JP, U) JP-A 64-64 15647 (JP, U) Fully open 63-138950 (JP, U) Fully open 59-45807 (JP, U) Fully open 62-202937 (JP, U) (58) Fields investigated (Int. ⁷ , DB name) B22D 11/128 310

Claims (2)

(57) [Claims] 1. A slab guide roll segment in which a lower frame and an upper frame are connected via four tie rods, and a slab guide roll is assembled in parallel with the upper and lower frames facing each other. A piston formed in a cylindrical shape and having a thread on an upper outer peripheral surface is slidably mounted on the upper part of the tie rod erected in a vertical direction, and the upper frame is supported via a spherical seat provided on a lower outer peripheral part of the piston. Along with this, a worm wheel is provided by being screwed into a screw on the upper part of the piston, and a fixed frame is further provided on a tie rod on which the piston is mounted, and the worm wheel is held by the fixed frame,
A slab guide roll segment comprising a drive device for driving a worm wheel. 2. The slab guide roll segment according to claim 1, wherein a flange is formed on an outer peripheral surface of the piston, and the flange is housed in a cylinder having a lower surface formed in a convex spherical seat and an upper surface formed in a convex spherical seat. A slab guide roll segment in which the formed head cover is attached and sealed to form an oil chamber between the lower surface of the flange and the bottom of the cylinder, while supporting the upper frame via the convex spherical seat.