JPH08206802A - Guide roll segment for cast slab - Google Patents

Abstract

PURPOSE: To simply and precisely change the interval between an upper roll and a lower roll in a roll segment for carrying a cast slab. CONSTITUTION: This roll segment is constituted with lower extending/shrinking rods of rolling reduction cylinders 11 arranged an upper fixed frame 4 and having upper extending/shrinking rods screwed and fixed with nuts 12 in an upper roll supporting frame having the upper roll facing the lower roll supported by a lower fixed frame and slidably guided by a guide 13 provided with a stroke adjusting member 14 having interval pieces 14a, 14b, 14c having different thicknesses in the cylindrical body of the rolling reduction cylinder 11. The interval between the rolls can simply and accurately be changed only by shifting the targeted interval piece in the interval pieces 14a, 14b, 14c to the lower part position and descending the upper extending/shrinking rod to abut the nut 12 on the interval piece.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, in order to taper a slab cast by a continuous casting machine in a taper shape along the direction in which the slab is conveyed, provides a highly accurate gap between the upper and lower rolls. And a slab guide roll segment adapted to be easily changed.

[0002]

2. Description of the Related Art As is well known, in continuous casting equipment, the profile of the slab guide rolls arranged on both sides of the slab in the flow direction of the slab is such that as the slab heat shrinks, the slab guide roll rolls toward the destination side. It is common to provide a taper so that the gap becomes smaller.In order to improve the quality of the slab, the roll interval along the conveying direction of the slab is tapered, and a light rolling force is applied to the slab by the roll. It is preferable to add. The slab guide roll segment having such a structure is disclosed, for example, in Japanese Utility Model Publication No. 62-45807 (conventional example 1) filed by the applicant of the present application, and in Japanese Utility Model Publication No. Sho 64 of the same application filed by the present applicant.
-42758 (conventional example 2).

The outline of the slab guide roll segment will be described below. First, the slab guide roll segment according to the conventional example 1 disclosed in Japanese Utility Model Publication No. 62-45807 discloses a state in which the slab is pressed. 9 of the figure showing
As shown in FIG. 9B, which is a view mainly showing (a) and the tie rod portion thereof, a plurality of upper rolls 50A, 50
Upper frame 53 supporting B, 50C, 50D and 50E
The tie rod 5 through the spherical seats 55, 56, 57 and 58.
The upper frame 53 is supported by the upper part of the No. 4 and the height of the upper roll in the conveying direction of the slab is changed little by little so that the upper frame 53 can be inclined. In this case, the upper rolls 50A, 50B, 50C, 50D, 50E
And lower rolls 51A, 51B, 51C, 51D, 51E
When adjusting the roll spacing between the tie rods and the rolling reduction ratio with respect to the slab, the screw 54 screwed on the lower part of the tie rod 54 is used.
The worm wheel 59 screwed to a is driven.

Next, the slab guide roll segment according to the conventional example 2 disclosed in Japanese Utility Model Laid-Open No. 64-42758 will be described. This is an improved slab guide roll segment of the conventional example 1 described above. Then, as shown in FIG. 10 mainly showing the screw shaft portion, an upper frame 61 supporting a plurality of upper rolls (not shown) is supported above the screw shaft 62 via a cylinder device 63. The rolling force can be easily applied to the slab. In this case, as in the case of the conventional example 1, the worm wheel 64 screwed into the threaded portion 62a threaded on the lower portion of the screw shaft 62.
Is driven to adjust the roll interval between the upper roll and the lower roll (not shown), while the cylinder device 63 is operated to adjust the rolling reduction ratio with respect to the cast slab.

[0005]

SUMMARY OF THE INVENTION As described above, the conventional example 1
Alternatively, in the slab guide roll segment according to Conventional Example 2, in order to adjust the roll interval between the upper roll and the lower roll in a taper shape along the transport direction of the slab, the upper frame and the lower frame are set to 4 mm. The structure is such that the upper frame is moved up and down together with the tie rod with respect to the lower frame by a feed screw mechanism connected to the tie rod via a book tie rod.
In other words, since the roll interval of the upper and lower rolls is performed by the rotation of the worm wheel, it is difficult to finely adjust the roll interval, and although it is said that the drive is synchronous, in the direction orthogonal to the conveying direction of the slab. There is a problem to be solved that it is difficult to make the intervals uniform.

[0006] Therefore, an object of the present invention is to provide a cast guide roll segment which enables the roll spacing to be adjusted accurately and easily.

[0007]

Therefore, the feature of the means adopted by the slab guide roll segment according to claim 1 of the present invention is that the lower fixed frame and the upper fixed frame are interposed by the left and right side plates. A plurality of lower rolls are arranged in parallel on the lower fixed frame of the connected roll stand, and an upper roll support frame that supports a plurality of upper rolls facing these lower rolls is provided on the upper fixed frame. In a slab guide roll segment supported by a lifting device so as to be able to move up and down, at least two sets of the lifting devices are provided in the conveying direction of the slab of the upper fixed frame, and the lifting devices expand and contract in synchronization with each other. A double rod type reduction cylinder having a rod, the upper roll support frame being connected to the lower telescopic rod, and a slide provided on the upper telescopic rod. A guide, which is provided in parallel with the upper roll on the upper body and the cylinder body of the reduction cylinder, slides while being guided by the guides on both sides sandwiching the upper telescopic rod, and predetermined in the sliding direction. A stroke adjusting member having a plurality of stages of stroke adjusting portions arranged at a pitch and different in height with which the lower surface of the stopper abuts, and the stroke adjusting member is provided below the stopper. And an actuating device for stopping and moving it to a certain position.

The feature of the means adopted by the slab guide roll segment according to claim 2 of the present invention is that the slab guide roll segment according to claim 1 is characterized in that the stroke adjusting member has a plurality of stages of stroke adjustment. The space pieces having different thicknesses are detachably arranged in the parts.

[0009]

According to the slab guide roll segment according to the first aspect of the present invention, the stopper is raised when the upper and lower telescopic rods of the respective pressing cylinders of the two sets of lifting devices are moved upward. Then, the stroke adjusting member supported by the guide is slid by the actuating device, and when the stroke adjusting portion of the stroke adjusting member reaches the desired lower surface position of the stopper, the vertical expansion / contraction rod of the pressing cylinder is moved downward. And the upper roll descend through the upper frame, the lower surface of the stopper abuts the stroke adjustment part, and the roll distance between the upper and lower rolls is the distance depending on the dimension of the stroke adjustment part and the stopper mounting position. become.

According to the slab guide roll segment of the second aspect of the present invention, the liners having different thicknesses are detachably disposed in the stroke adjusting portions of the stroke adjusting member. In addition to the operation relating to the slab guide roll segment described in (1), the roll interval between the upper and lower rolls can be freely set by replacing the interval piece.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A cast guide roller segment according to a first embodiment of the present invention will now be described with reference to FIG. 1 showing its entire front view, FIG. 2 showing its side view, and FIG. 3, a side view of FIG. 3, a plan view of FIG. 3, and a schematic view of an adjusting member operating cylinder, which is an operating device, will be described with reference to FIGS.

Reference numeral 3 shown in FIGS. 1 and 2 is a lower fixed frame attached to the base frame 1, and on the upper surface thereof, four lower rolls 8 are attached as shown in FIG. As shown in FIG. 1, left and right side plates 2 and 2 are fixed in an upright state by positioning pins 6 and bolts 7 on both sides in the width direction of the lower roll 8 in the longitudinal direction. The left and right side plates 2 and 2 are made of thick steel plate, and a notch 2a is formed in the upper center thereof, and liners 2b are fixed by bolts (not shown) to the vertically opposing surfaces of the notch 2a. ing. Reference numeral 5 is an upper roll support frame, and four upper rolls 9 facing the lower roll 8 are attached to the lower surface thereof, and the upper roll support frame 5 is provided above the left and right side plates 2 and 2. It is supported so as to be able to move up and down by an elevating device 10 which will be described later and which is arranged on an upper fixed frame 4 which is erected.

The elevating device 10 is provided at each of two positions on the inlet side and the outlet side of the slab W of the upper fixed frame 4, and a nut 12 as a stopper is screwed on the upper end side on the upper side.
There is provided a pressing cylinder 11 having a fixed upper telescopic rod 11c and a lower telescopic rod 11b to which the upper roll support frame 5 is connected via a horizontal connecting pin on the lower side, and these rods 11b, Reference numeral 11c is configured to be expanded and contracted by a piston 11d that is reciprocally moved in the vertical direction in the cylinder body 11a. In addition,
2 on the entrance side in the most extended state of the upper telescopic rod 11c
One reduction cylinder 11 and two exit side reduction cylinders 11
The distances between the nut 12 and the nut 12 are set so that the inlet side is smaller than the outlet side, that is, different strokes are set, and due to this stroke difference, the slab W is tapered in the conveying direction. .

Further, as shown in FIG. 1, trunnion shafts 5a, 5a, which will be described later, are provided in a protruding manner at the center positions on the left and right sides of the upper roll support frame. The trunnion shafts 5a, 5a have a rectangular cross section, as shown in FIG. Then, a half-moon liner 5b having a convex curved surface bulging on the opposite side is fixed to the vertical parallel surfaces of the trunnion shafts 5a, 5a which are perpendicular to the direction in which the slab W is conveyed, and the trunnion shafts 5a and 5a are fixed to each other. 5a, 5a are fitted via a half-moon liner 5b between liners 2b provided on the vertical opposite surfaces of the notch 2a, and the upper roll support frame 5 swings about the trunnion shaft 5a. It is configured to move and slide in the vertical direction.

As shown in FIGS. 3 to 5, on each of the cylinder main bodies 11a, a flat plate portion and a Γ-shaped protrusion projecting upward on opposite sides of the upper elastic rod 11c in the width direction thereof are provided. A guide 1 including a guide portion having a cross section
3 and 13 are upper expansion rods 11 of the reduction cylinder 11.
It is arranged in parallel with the upper and lower rolls 9 and 8 on both sides of c. A stroke adjusting member 14, which will be described later, having a U-shape when viewed from above is slidably fitted to these guides 13, 13. On the upper surface of each of the forked portions of the stroke adjusting member 14, there are three types of spacing pieces 14a, 1 having different thicknesses, which are stroke adjusting portions.
Two sets of 4b and 14c are detachably fixed at a predetermined pitch. In this way, three types of spacing pieces 14
Two pairs of a, 14b and 14c are fixed because the pressing cylinders 11 are provided at two positions in the width direction of the upper fixed frame 4, as shown in FIG.

As described above, since the pressing cylinders 11 of the elevating device 10 are provided at each of two positions, the inlet side and the outlet side of the slab W of the upper fixed frame 4, the stroke adjusting member 14 as described above is provided. Are provided in two sets. These stroke adjusting members 14 and 14 have a bracket 1 at the center.
The ends of the connecting frame 15 having 5a are fixed to each other, and two sets of stroke adjusting members 14, 14 are provided.
Is configured to be operated by a double rod type adjusting member operating cylinder 16, which will be described later, which is an operating device in which the tip of the rod is pivotally attached to the bracket 15a.

As shown in FIGS. 5 and 6, the adjusting member operating cylinder 16 includes two independent hydraulic chambers 16a, 1a.
6b, the telescopic rods 16c and 16d project in opposite directions, the tip of one telescopic rod 16c is connected to the bracket 15a, and the other telescopic rod 16 is provided.
The tip of d is connected to a fixing bracket 17 which is provided across the guide 13. That is, when the adjusting member operating cylinder 16 is in the most contracted state, one of the telescopic rods 16c is extended, and both of the telescopic rods 16c and 16d are extended, the three-stage spacing pieces 14a. By individually arranging 14b and 14c on the lower surface of the nut 12, the roll interval can be adjusted in three steps, and it is possible to easily cope with the guiding of cast pieces of different sizes. As shown in FIG. 7, the adjusting member operating cylinder 16 includes a tip cylinder 16b on which the tip of the telescopic rod 16d slides the stroke adjusting member 14, and a tip of the telescopic rod 16c on the head side of the tip cylinder 16b. A base end cylinder 16 which is connected and whose head side is connected to the fixing bracket 17
It may be configured by a.

The mode of operation of the slab conveying roll segment will be described below. When the upper and lower telescopic rods 11b and 11c of the pressing cylinder 11 are moved upward, the nut 12 as a stopper is raised and the stroke adjusting member 14 is moved. A gap is formed between the lower surface of the nut 12 and the lower surface of the nut 12. Therefore, the three types of spacing pieces 14a. The adjustment member actuating cylinder 1 such that a spacing piece having a thickness capable of obtaining a desired roll spacing of 14b and 14c is located on the lower surface of the nut 12.
Stretch the rod of 6. When the spacing member having a desired thickness comes to the lower surface of each nut 12 due to the expansion and contraction of the rod of the adjusting member operating cylinder 16, the operation of the adjusting member operating cylinder 16 is stopped and the reduction cylinder 1
1 is supplied with hydraulic oil having a predetermined pressure to move the upper and lower telescopic rods 11b and 11c downward.

When the lower surface of each nut 12 abuts on the upper surface of the spacing piece, a desired roll spacing is secured between the upper roll 9 and the lower roll 8, and at the same time as the entry side pressing cylinders 11 and 11. Due to the difference in stroke between the exit-side reduction cylinders 11 and 11, the roll interval between the lower roll 8 and the upper roll 9 on the inlet side becomes larger than the roll interval on the outlet side, and the roll interval becomes in the conveying direction of the slab. Is adjusted along the taper. Then, when the adjustment of the roll interval is completed, the transportation of the slab W is started, and the rolling force for the slab W is secured by the hydraulic pressure supplied to the rolling cylinder 11. Further, when an abnormal force is applied from the slab, the pressure of the hydraulic oil in the piping line of the pressure reduction cylinder 11 rises, but the hydraulic oil escapes from the relief valve provided in the piping line and is buffered.

As described above, according to the slab-conveying roll segment of this embodiment, unlike the conventional slab-conveying roll segment, the worm and the worm wheel need not be rotated and the stroke adjusting member 14 can be rotated. Horizontal movement and vertical expansion / contraction rods 11b, 11c of the reduction cylinder 11
The roll interval can be secured very easily and with high precision only by the expansion and contraction operation of. The spacing pieces 14a. 14
Since b and 14c are detachable, there is an effect that the roll interval can be easily changed only by changing the thickness of these interval pieces.

Further, in the slab guide roll segment according to the conventional example, in order to adjust the roll interval between the upper roll and the lower roll in a taper shape along the transport direction of the slab, an upper frame and a lower frame are used. Is connected via four tie rods, and a feed screw mechanism (driven by a worm wheel) connected to the tie rods is used to raise and lower the upper frame together with the tie rods with respect to the lower frame. Since the slab conveying roll segment according to (3) only needs the left and right side plates 2 and 2 and the cylinder, it has an economic effect that it is advantageous in terms of equipment cost.

The stroke adjusting member 14 has been described above.
The example in which the three types of spacing pieces 14a, 14b, 14c are detachably fixed to the stroke adjusting member 14 has been described.
More than one type of spacing piece can be attached. For example, when four types of spacing pieces are attached to the stroke adjusting member 14, the adjusting member operating cylinder 16 may be configured as shown in FIG. 8, for example. That is, two independent hydraulic chambers 16 with one having twice the stroke of the other.
With the configuration including a and 16b, it is possible to individually move each of the four types of spacing pieces to the lower surface position of the nut 12 provided on the upper telescopic rod 11b of the pressing cylinder 11.

Further, in the above, the spacing pieces 14a, 1 detachably provided on each of the two sets of stroke adjusting members 14 are provided.
4a, spacing pieces 14b, 14b, and spacing piece 14
Although the case where c and 14c have the same thickness has been described as an example, a stroke difference is provided in the upper expansion rod 11b of the two compression cylinders 11 on the inlet side and the two compression cylinders 11 on the outlet side. Alternatively, the same thickness difference may be provided between the spacing pieces 14a and 14a, between the spacing pieces 14b and 14b, and between the spacing pieces 14c and 14c.

Next, a description will be given of a segment for rolling a cast product according to a second embodiment of the present invention.
Is that the structure of the actuating device for actuating the stroke adjusting member is different. Although not shown in detail, the actuating device is fixed to a ball screw whose one end side is connected to a bracket provided at the center of the connecting frame, and a fixing bracket provided across the guide. , A drive device having a rotor screwed to the ball screw.

Therefore, when the rotor is rotated by the drive device, the ball screw reciprocates in the longitudinal direction thereof, and the stroke adjusting member is guided by the guide through the bracket and the connecting frame to move, thereby the desired spacing piece. Since this is on the lower surface of the nut, this embodiment has the same effect as the above embodiment. The drive device is stopped by, for example, a limit switch, and re-activated by pressing a push button switch. Further, although the ball screw is used in this embodiment, a square screw may be used.

A slab-conveying roll segment according to the third embodiment of the present invention will be described. Although not shown, this embodiment differs from the above-mentioned second embodiment in that the mounting positions of the ball screw and the drive device are different from each other. There is a difference. That is, the actuating device has a ball screw whose one end is fixed to a fixing bracket provided across the guide, and a rotor which is screwed to the screw rod and is rotated, and the connecting frame. And a drive device arranged on a bracket provided at the center of the.

Therefore, when the ball screw is rotated by the drive of the driving device, the rotor moves along the ball screw,
Since the stroke adjusting member is guided and moved by the guide through the rotor and the connecting frame, the spacing piece having a desired thickness can be positioned on the lower surface of the nut, and thus this embodiment is the same as the above embodiment. Same effect. The driving device is stopped by the limit switch as in the above embodiment, and the re-operation is performed by pressing the push button switch.

In the above embodiment, the case where two reduction cylinders are provided in the longitudinal direction of the upper roll 9 of the upper fixed frame 4 has been described as an example, but the number of the reduction cylinders is one. Or even three, so
The number of reduction cylinders is not particularly limited.

[0029]

As described in detail above, the first aspect of the present invention
According to the slab guide roll segment according to the second aspect, the stroke adjusting member supported by the guide is slid by the actuating device or the driving device, and the desired stroke adjusting portion is provided on the upper expansion rod of the reduction cylinder. The distance between the upper and lower rolls can be secured simply by locating it on the lower surface of the stopper and operating the vertical expansion and contraction rod of the pressing roll downward to bring the lower surface of the stopper into contact with the stroke adjustment section. Thus, it becomes possible to adjust the roll interval with extremely high accuracy and quickly, which has a great effect on the quality improvement of the slab and the improvement of production.

[Brief description of drawings]

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

FIG. 2 is an overall side view of a slab guide roll segment according to the first embodiment of the present invention.

FIG. 3 is a detailed explanatory diagram of a portion A in FIG.

FIG. 4 is a side view of FIG. 3;

FIG. 5 is a plan view of FIG. 3;

FIG. 6 is a schematic diagram of an adjusting member operating cylinder that is an operating device.

FIG. 7 is a schematic view of an adjusting member operating cylinder according to another embodiment.

FIG. 8 is a schematic view of an adjusting member operating cylinder according to another embodiment.

FIG. 9 (a) is a diagram showing a state in which a cast piece is rolled by a cast piece guide roll segment according to Conventional Example 1, and FIG. 9 (b) is a view mainly showing a tie rod portion thereof.

FIG. 10 is a view mainly showing a screw shaft portion of a slab guide roll segment according to Conventional Example 2.

[Explanation of symbols]

1 ... Base frame, 2 ... Side plate, 2a ... Notch, 2b ...
Liner, 3 ... Lower fixed frame, 4 ... Upper fixed frame,
5 ... Upper roll support frame, 5a ... Trunnion shaft, 5b
… Half-moon type liner, 6… Positioning pin, 7… Bolt, 8
... lower roll, 9 ... upper roll, 10 ... lifting device, 11 ... compression cylinder, 11a ... cylinder body, 11b ... lower telescopic rod, 11c ... upper telescopic rod, 11d ... piston, 12
… Nuts, 13… Guides, 14… Stroke adjusting members,
14a, 14b, 14c ... Spacing piece, 15 ... Connection frame, 15a ... Bracket, 16 ... Adjusting member operating cylinder, 16a ... Base cylinder or hydraulic chamber, 16b ... Tip cylinder or hydraulic chamber, 16c, 16d ... Telescopic rod, 17
... Fixing bracket, W ... Slab.

Claims (2)

[Claims] 1. A plurality of lower rolls are arranged in parallel on the lower fixed frame of a roll stand in which a lower fixed frame and an upper fixed frame are connected via left and right side plates, and these lower rolls face each other. In a slab guide roll segment in which an upper roll support frame that supports a plurality of upper rolls is movably supported by an elevating device provided on the upper fixed frame, the elevating device conveys the slab of the upper fixed frame. Direction, at least two sets are provided, and each of these lifting devices has upper and lower telescopic rods that synchronously expand and contract,
A double rod type reduction cylinder in which the upper roll support frame is connected to the lower extension rod, a stopper provided on the upper extension rod, and a cylinder body of the reduction cylinder provided in parallel with the upper roll. With a guide,
Plural stages of stroke adjustment in which both sides of the upper telescopic rod are guided and slid by the guides and are arranged at a predetermined pitch in the sliding direction, and the lower surfaces of the stoppers abut different heights. A slab guide roll segment comprising: a stroke adjusting member having a portion; and an operating device that moves the stroke adjusting member to a position where the stroke adjusting portion is below the stopper and stops the stroke adjusting member. 2. The slab guide roll segment according to claim 1, wherein spacing pieces having different thicknesses are detachably disposed on a plurality of stages of stroke adjusting portions of the stroke adjusting member.