JPH10113719A - Leveling device for metal plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To pass a metal plate to an inclined guide regardless of leveling time or non-leveling time, further to conduct switching between leveling and non leveling of the metal plate in a short time. SOLUTION: An inclined guide 17 is arranged between pinch rollers 5, 7 and a level roller 11, the inclined guide 17 is integrally fixed to a frame 19, the inclined guide 17 is elevated simultaneously with the frame 19 while its angle with a bar stock 1 is kept unchanged. Further, adjustment of a rolling reduction of each upper side level roller 14 is conducted by a worm screw jack 15 beforehand, when switching for leveling or non-leveling, while maintaining a position of each upper side level roller 14, the frame 19 to support the upper side level roller 14 is rapidly elevated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate leveling apparatus for correcting the curving of a plate after rolling, and more particularly, to a re-rolling of a coarse bar obtained by rough rolling a hot slab before finish rolling. The present invention relates to a plate material leveling device suitable for correcting the bending of a rough bar in advance when performing a process such as heating or bonding.

[0002]

2. Description of the Related Art After a hot slab is roughly rolled to obtain a rough bar, it is reheated to compensate for the temperature drop of the rough bar or subjected to continuous rolling before finishing rolling in the next step. It is often performed to join the rough bars one after another in order to perform the following. In order to facilitate these operations, it is important to correct (level) the curve of the coarse bar in advance.

[0003] Of the above, one example of a leveling device for bonding the latter rough bar is disclosed in Japanese Patent Laid-Open No. Hei 6-170411.
No., published in Japanese Unexamined Patent Publication No. In this prior art, the coarsely-rolled coarse bar is once wound around a coil and then rewound.In order to correct the curving of the coarse bar, an inclined guide is provided on the entry side of a straightening roller. A leveling method by a leveler is shown.

On the other hand, Japanese Utility Model Laid-Open Publication No. Sho 60-186909 discloses that a pinch roller is provided on the entrance side, and the angle of the guide with respect to the plate material is changed in accordance with the opening and closing operation of the pinch roller (up and down operation of the upper pinch roller). Devices are shown. Further, in this conventional technique, a method is used in which the amount of reduction during correction is set by raising and lowering the upper roller for correction with a reduction screw.

[0005]

Even in the rolling equipment provided with the leveling device as described above, the rough bars are not always joined and rolled, and ordinary rolling without selective joining is performed. You may be asked. That is, it is normal that bonding is performed only on a thin material that is difficult to finish roll, for example, a rolled material having a finished plate thickness of about 1.2 mm to 3.0 mm.
In the case of a rolled material exceeding 3.2 mm, it can be easily rolled without any trouble, so there is no need for joining, and further, winding, unwinding and leveling of the coarse bar are not required.

However, in order to prevent the leading end of the rough bar from catching on the table roller that conveys it, a normal rough bar is rolled in a curling tendency. There is a concern that the tip of the rough bar abuts the inclined guide, and the rough bar cannot be advanced forward. In order to prevent this, for example, it is possible to adopt a method in which the coarse bar is pushed into the inclined guide and passed therethrough by a pinch roller provided on the entry side of the roller leveler, and thereby the coarse bar is advanced forward. When passing through the inclined guide, the surface of the coarse bar is scratched and the product quality is reduced.

Further, in order to reduce the scratches on the surface of the rough bar as described above, it is not possible to make the gap on the exit side of the inclined guide sufficiently small. In the case of leveling the material, it is expected that the biting property of the plate to the roller will be deteriorated, and it is necessary to increase the diameter of the roller to, for example, about 500 mm in diameter in order to improve the biting property.

In the prior art described in Japanese Utility Model Laid-Open Publication No. Sho 60-186909, the angle of the guide with respect to the plate is small when the plate is sandwiched between the pinch rollers and introduced into the correction roller. In the open state (before sandwiching the plate), the angle of the guide with respect to the plate is large, so that the tip of the rough bar, whose tip usually tends to warp, can easily hit the slope of the guide before closing the pinch roller. There is a fear that the material will stop. Especially,
When the rough bar after the rough rolling of the slab stops, slipping occurs with the table roller, causing scratches and other problems such as local cooling at the place where the table roller hits,
Further, if the pinch roller is forcibly pushed, the same problem as the above-described scratching occurs.

Further, in an actual operation, the case where the above-mentioned leveling is necessary and the case where the leveling is not necessary often occur in a short cycle, and it is necessary to speed up the switching between the leveling and the non-leveling. However,
In the prior art described in Japanese Utility Model Application Laid-Open No. 60-186909, the upper roller for correction is raised and lowered only with the screw down screw to set the amount of reduction at the time of straightening. It takes a lot of time to switch between non-leveling.

A first object of the present invention is to provide a plate leveling apparatus which can easily pass a plate through an inclined guide regardless of whether the plate is leveled or not.

A second object of the present invention is to provide a plate material leveling apparatus capable of switching between leveling and non-leveling of a plate material in a short time.

[0012]

In order to achieve the first object, according to the present invention, a roller leveler in which a plurality of upper rollers and lower rollers are arranged in a staggered manner, and the plurality of upper rollers are mounted. In a plate leveling device for correcting a curving of the plate, the frame has a frame that moves up and down with respect to the lower roller, and a pinch roller that is disposed on the roller leveler entry side and introduces the plate to the roller leveler. An inclined guide is provided between the pinch roller and the roller at the upper part of the pass line so that the distance between the plate and the sheet material decreases from the entry side to the exit side,
In addition, there is provided a plate material leveling device, wherein the inclination guide is integrally fixed to the frame so as to move up and down simultaneously with the raising and lowering of the frame while keeping the angle with the plate material unchanged.

In order to achieve the first and second objects, in the above-described plate leveling apparatus, the amount of reduction of each of the upper rollers with respect to the lower roller is independently determined with respect to the frame. And a lifting actuator for rapidly raising and lowering the frame with respect to the lower roller while maintaining the relative position of each of the upper rollers.

Further, in order to achieve the second object,
According to the present invention, a roller leveler in which a plurality of upper rollers and lower rollers are arranged in a staggered manner, a frame to which the plurality of upper rollers are attached and which moves up and down with respect to the lower roller, and which is disposed on the roller leveler entrance side. A pinch roller for introducing the plate material to the roller leveler, and in a plate material leveling device for correcting the bending of the plate material, the amount of reduction of each of the upper rollers with respect to the lower roller is independently determined with respect to the frame. A plate amount leveling device, comprising: a roll-down amount adjusting means for adjusting the upper and lower rollers, and an actuator for raising and lowering the frame with respect to the lower roller while maintaining the relative position of each of the upper rollers. Is provided.

In the present invention configured as described above,
An inclined guide is formed between the pinch roller and the roller leveler at the upper part of the pass line through which the plate material passes so that the distance between the plate and the plate material decreases from the entry side to the exit side, and the inclination guide is integrally fixed to the frame. In addition, the angle between the inclined guide and the plate is maintained regardless of the opening / closing operation of the pinch roller and the frame, regardless of the opening / closing operation of the pinch roller, while maintaining the angle with the plate unchanged. Does not change. Therefore, if the angle of the inclined guide is set and fixed to an angle such that, for example, the upper and lower rollers can be engaged with the roller and the coarse bar does not strike violently, the plate can be fixed to the roller. The tip of the rough bar, whose tip has a tendency to warp, can be prevented from hitting the inclined guide without impairing the biting performance, and the rough bar surface can be prevented from being scratched, and the product quality can be reduced. Absent.

Further, in the present invention, the adjustment of the amount of reduction with respect to the lower roller of each upper roller and the rapid raising and lowering of the lower roller of the frame are independently performed. That is, each upper roller is independently adjusted with reference to the frame by the rolling amount adjusting means, while the frame is rapidly moved with respect to the lower roller while maintaining the relative position of each of the upper rollers by the actuator for raising and lowering. Up and down. Thereby, the amount of reduction of the upper roller is adjusted in advance to a state where a predetermined leveling is possible, and while maintaining the state (independent of the setting of the amount of reduction), for example, the frame is lifted by an actuator for raising and lowering a cylinder or the like. Since each upper roller can be raised and lowered quickly, even if the plate is running, switching between leveling and non-leveling can be done in a short time without much time, and the rolling amount can be precisely adjusted. Settings can be realized.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a diagram showing a plate material leveling device according to the present embodiment, and FIG. 2 is a schematic configuration diagram of a plate material rolling facility provided with the plate material leveling device of FIG. In FIG. 1, the lower leveler roller 11 is a bearing housing 1.
2, the bearing housing 12 is fixedly attached to the stand 4. The upper leveler roller 14 is supported by a bearing box 13, and each of the bearing boxes 13 is attached to a frame 19 via a separate worm screw jack 15, and the frame 19 is moved up and down rapidly by a cylinder 21 provided on the stand 4. Has become. Note that the cylinder 21 is an elevating actuator.

The lower pinch roller 5 is supported by a bearing box 6, which is fixedly mounted on the stand 4, while the upper pinch roller 7 is supported by a bearing box 8,
The bearing box 8 is moved up and down by a cylinder 9 provided on the stand 4, and the coarse bar 1 is pinched by the up and down movement of the upper pinch roller 7, and the upper leveler roller 1 is moved.
4 and the lower leveler roller 11. The worm screw jack 15 is moved up and down by a worm shaft 22 driven by an actuator such as a motor (not shown),
The setting of the amount of reduction of the upper pinch roller 7 with respect to the lower leveler roller 11 and, therefore, the setting of the precise amount of reduction with respect to the coarse bar 1
This can be performed for each upper leveler roller 14. The worm screw jack 15 is a reduction amount adjusting means.

Between the pinch rollers 6 and 7 and the leveler rollers 11 and 14 above the pass line through which the coarse bar 1 passes, the coarse bar 1 is moved from the entrance side to the exit side of the coarse bar 1.
The inclined guide 17 is provided so that the distance between the guides is reduced. The inclined guide 17 is fixed via a connection frame 20 to a frame 19 that supports the upper leveler roller 14 in a state where the angle with respect to the rough bar 1 is set to a predetermined angle in advance. The angle of the inclined guide 17 is set to be smaller than the angle at which the rough bar 1 can be engaged with the upper and lower leveler rollers 11 and 14 and does not hit the rough bar 1 sharply.

Next, with reference to FIG. 2, an example of the sheet rolling equipment will be described focusing on the production of a hot thin sheet. In FIG. 2, a slab 25 heated to a predetermined temperature is rolled into a rough bar 1 by a rough rolling facility 26 in which a large-diameter rough rolling roll 32 is arranged. Usually, the dimensions of the slab 25 are
It is 200 ~ 250mm, width is 650mm ~ 2,100mm, length is about 6 ~ 13m, and its temperature is 1,100 ~ 1,200 ° C. This slab 2
5 is reduced in thickness by the rough rolling equipment 26 into a rough bar 1 having a thickness of 28 to 50 mm. The tip of the rough bar 1 is rolled so as to be warped as shown in FIG. The height of the warp portion 18 at the tip of the rough bar 1 is about 200 mm when it is large. When the front and rear ends of the plurality of coarse bars 1 having such a large warp portion 18 are joined on a line as described in JP-A-6-170411, or as shown in FIG. In order to control the temperature of the coarse bar 1 by passing through the heating furnace 28 having the
Needs to be corrected, and the plate material leveling device of the present embodiment is used for the correction. The rough bar 1 whose warpage 18 has been corrected in advance in this way is then finish-rolled by a finish rolling equipment 29 provided with a finish rolling roll 30 to produce a sheet product of 1.2 to 25.4 mm.

Next, the operation of correcting the above-mentioned warped portion 18 of the rough bar 1 will be described with reference to FIG. The rough bar 1 is guided by a table roller 2 to pinch rollers 5, 7 which are supported on bearing housings 6, 8. At this time, as shown by a solid line in the figure, the upper pinch roller 7 is raised by raising the bearing box 8 with the cylinder 9. Then, when the upward warpage portion 18 of the tip of the rough bar 1 passes between the pinch rollers 5 and 7, the upper pinch roller is lowered to a position shown by a two-dot chain line in the figure, and the pressing force of the cylinder 9 is reduced. Pinch by. The pinch force pushes the coarse bar 1 so as to pass through the inclined guide 17 and causes the leveler rollers 11 and 14 to bite. At this time, the upper warp portion 18 at the end of the rough bar 1 contacts the inclined guide 17 to some extent and is deformed, but does not hit violently, and the amount of deformation is sufficiently small. Therefore, it is possible to easily engage the leveler rollers 11 and 14 with each other.

Each of the upper leveler rollers 14 supported by the bearing box 13 is adjusted in position at the time of leveling by an individual worm screw jack 15 in advance.
Precise setting of the reduction amount during leveling is performed.
Further, the frame 19 is rapidly moved up and down by the cylinder 21 while maintaining the state in which the position of each of the upper leveler rollers 14 is set, that is, while the precise setting of the amount of reduction at the time of leveling is unchanged. Switching between leveling and non-leveling can be performed in a short time.

A guide 3 is fixed to the side of the stand 4 where the coarse bar 1 enters, and when the upper pinch roller 7, the inclined guide 17 and the upper leveler roller 14 are raised by the guide 3 during non-leveling, the coarse bar 1 is moved. It does not hit the upper pinch roller 7 or the like.

The stop position of the frame 19 supporting the upper leveler roller 14 when the frame 19 is lowered is determined by a notch stopper 16 provided on the stand 4. Therefore, the cylinder 21
The plurality of upper leveler rollers 14 raised in the step can be easily returned to the original leveling position by the notch stoppers 16 when the lower leveler rollers 14 are lowered while maintaining the state in which the amount of reduction is set. When the same rough bar 1 is leveled, the reproducibility of the reduction amount is very good. Further, when the plate thickness of the rough bar 1 is changed, the amount of reduction of each upper leveler roller 14 may be corrected by the worm screw jack 15.

The inclination guide 17 is also connected to the connection frame 20.
, The inclination guide 17 can be quickly raised together with the upper leveling 14 by the operation of the cylinder 21 at the time of non-leveling, and rapidly lowered together with the upper leveling 14 at the time of leveling, and stopped by the stopper 16. It can be returned to the original position.

According to the present embodiment as described above, the inclined guide 17 is provided between the pinch rollers 5 and 7 and the leveler rollers 11 and 14 above the pass line of the rough bar 1, and the frame for supporting the upper leveler roller 14 is provided. Since the inclination guide 17 is integrally fixed to the frame 19 and the inclination guide 17 is moved up and down simultaneously with the frame 19 while maintaining the angle with the coarse bar 1 unchanged, the angle between the inclination guide 17 and the coarse bar 1 is increased. And the tip of the rough bar 1 is prevented from hitting the inclined guide 17 without impairing the biting ability of the rough bar 1 to the leveler rollers 11 and 14, and the surface of the rough bar 1 is scratched or the product quality is reduced. Degradation is avoided.

Further, the amount of reduction of the upper leveler roller 14 with respect to the lower leveler roller 11 is adjusted by the worm screw jack 15. Apart from that, while maintaining the relative position of each upper leveler roller 14, the upper leveler roller 14 is adjusted. Since the supporting frame 19 is raised and lowered quickly by the cylinder 21, the upper leveler roller 1
Switching between leveling and non-leveling can be performed in a short time and with sufficient reliability while maintaining the state in which the amount of reduction of 4 is set precisely.

Further, the notch stopper 1 is provided on the stand 4.
The provision of 6 makes it possible to easily return the upper leveler roller 14 and the inclined guide 17 to the original leveling position when switching from non-leveling to leveling.

In the above description, the leveler rollers 11, 1
Although the number of fours is set to two each, other numbers may be used. Further, the case where the leveling of the rough bar 1 is performed has been described above, but it goes without saying that the present invention can be applied to the leveling of other plate materials.

[0030]

According to the present invention, the inclined guide provided between the pinch roller and the roller leveler is integrally fixed to the frame supporting the upper leveler roller, and the angle of the inclined guide to the plate is maintained unchanged. Since the plate is raised and lowered at the same time as the frame, the tip of the plate can be prevented from hitting the inclined guide without impairing the ability of the plate to bite into the rollers, and scratches and reduced product quality can be avoided. Moreover, since the biting ability of the plate material to the roller is not impaired, it is not necessary to increase the diameter of the roller in order to improve the biting property.

Further, since the adjustment of the amount of reduction of each upper roller and the rapid raising and lowering of the frame supporting the upper roller are performed independently, it is possible to maintain the state in which the amount of reduction of the upper roller is set precisely. Switching between leveling and non-leveling can be performed in a short time and with sufficient reliability.

Further, by providing the notch stopper on the stand supporting the roller leveler, the upper roller and the inclined guide can be easily returned to the original leveling position when switching from non-leveling to leveling.

[Brief description of the drawings]

FIG. 1 is a view showing a plate leveling apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of a plate rolling facility including the plate leveling device of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rough bar 4 Stand 5 Pinch roller 6 Bearing box 7 Pinch roller 8 Bearing box 9 Cylinder 11 Lower leveler roller 12 Bearing box 13 Bearing box 14 Upper leveler roller 15 Worm screw jack 16 Notch stopper 17 Inclined guide 18 Warp 19 Frame 20 Connection frame 21 cylinder

Claims (3)

[Claims] A roller leveler in which a plurality of upper rollers and lower rollers are arranged in a staggered manner; a frame to which the plurality of upper rollers are attached and which moves up and down with respect to the lower roller; A pinch roller for introducing the plate material to the roller leveler, and a leveling device for the plate material for correcting the curving of the plate material, from the entry side, between the pinch roller and the roller leveler in an upper part of the pass line through which the plate material passes. An inclined guide is provided so that a distance from the plate is reduced toward the exit side, and the inclined guide is integrated with the frame so as to be simultaneously moved up and down while the angle with the plate is kept unchanged. A plate leveling device characterized by being fixed in a fixed manner. 2. The plate leveling device according to claim 1, wherein the amount of reduction of each of the upper rollers with respect to the lower roller is independently adjusted with reference to the frame. A plate material leveling device, further comprising a lifting actuator for raising and lowering the frame rapidly with respect to the lower roller while maintaining the relative position of each roller. 3. A roller leveler in which a plurality of upper rollers and lower rollers are arranged in a zigzag pattern; a frame to which the plurality of upper rollers are attached and which moves up and down with respect to the lower roller; A pinch roller for introducing the plate material to a roller leveler, wherein the plate material leveling device corrects the curving of the plate material, wherein a reduction amount of each of the upper rollers with respect to the lower roller is independently determined with respect to the frame. Characterized in that the platen leveling means comprises: a pressure-reducing amount adjusting means for adjusting the upper and lower rollers, and an actuator for raising and lowering the frame with respect to the lower roller while maintaining the relative position of each of the upper rollers. apparatus.