JP2596486B2 - Online roll grinder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-line roll grinder for grinding a rolling roll during rolling, in which a grindstone can be made to follow the shape of the roll and can be efficiently ground. .

[0002]

2. Description of the Related Art In a hot rolling facility, so-called schedule-free rolling in which restrictions on a rolling schedule such as a steel type and a sheet width are relaxed, and improvement of productivity and energy saving are being performed. One of the problems that must be solved in order to perform such schedule-free rolling is smoothing of a worn portion of a work roll due to rolling, and a device for grinding a rolling roll during rolling has been conventionally developed. ing.

[0003] One of the devices for grinding a roll during rolling is one in which a grinding belt wound on a reel is pressed against the outer periphery of the roll and is run in the roll axis direction. By using such a grinding belt, not only the non-passing portion of the rolling roll, but also the passing portion can be ground,
Appropriate roll conditions can be maintained at all times.

However, in an apparatus using a grinding belt,
When the grinding belt travels, meandering occurs or the grinding belt is easily broken depending on the pressing force, and there is a problem that it is complicated and expensive to replace the grinding belt wound on the reel. Therefore, an apparatus using a grindstone (on-line roll grinder) has been developed as a roll grinding apparatus that solves these drawbacks, and there is no problem of meandering, and replacement of only the grindstone makes the cost low.

[0005]

However, in an apparatus using a grindstone, unlike a grinding belt, a new problem arises because the grindstone itself is not flexible. That is, as shown in FIGS. 9 (a) and 9 (b), the abrasion of the rolling roll caused by rolling is intense in the threaded portion A and hardly abraded in the non-threaded portion B. A step D often occurs on both sides. Therefore, when trying to grind this step D, unlike the case of the grinding belt, the grindstone E comes into a point contact state, causing the grindstone E to be worn in a spiral groove shape and easily broken, or the grindstone E or the grindstone shaft. When F cannot move and can be tilted only in parallel with the rolling roll C, as shown in FIG. 9B, there is a problem that the step portion D of the rolling roll C cannot be ground at all.

[0006] The present invention solves the problems of the prior art, and even if a step-like abrasion or the like occurs on the outer periphery of the roll, the roll can be efficiently ground in accordance with the shape and the breakage of the grindstone can be prevented. It is intended to provide an online roll grinder.

[0007]

SUMMARY OF THE INVENTION An online roll grinder according to the present invention is an online roll grinder for grinding a roll being rolled with a grindstone, wherein both ends of a grindstone shaft are rotated by a fixed frame and a movable frame that can be opened and closed. The grinding wheel is divided into a plurality in the axial direction, and these grinding wheels are mounted on the grinding wheel shaft via an elastic bush. Further, the present invention is characterized in that two sets of a grinder mechanism comprising the above-mentioned grindstone and a grindstone shaft are installed.

[0008]

According to the online roll grinder of the present invention, the grindstone is divided into a plurality of pieces in the axial direction, and the rotating shaft can be tilted or moved in parallel with the grindstone shaft via the elastic bush. By reducing the width of the two grindstones and tilting or moving the rotation axis of the grindstones, even if there are steps or irregularities on the roll surface, it is possible to perform grinding in accordance with these. Furthermore, the grinding wheel shaft is supported by the fixed frame and the movable frame, and a plurality of grinding wheels that are continuously divided from one side are mounted, so that the space for replacement of the grinding wheel is secured only on one side. In addition to making it good, the grinding surface by a plurality of grinding stones is made continuous so that grinding can be performed without gaps. According to the on-line roll grinder of the present invention, two sets of grinder mechanisms divided into a plurality and mounted on the grindstone shaft via elastic bushes are prepared to grind the roll surface. The grinding range and grinding time have been reduced by half so that grinding can be performed efficiently.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. 1 to 8 are drawings according to an embodiment of the online roll grinder of the present invention. As shown in FIG. 5, the online roll grinder 20 includes a rolling roll 2 and a reinforcing roll 3 that constitute a rolling mill 1.
Among them, the rolling roll 2 which is in direct contact with the material 4 to be rolled is always used for grinding with a grindstone during rolling, and is installed in the rolling mill housing 5 (in FIG. 5, only the device for the upper rolling roll is used). Is shown.)

A guide beam 21 having a rectangular cross section is fixedly supported on the rolling mill housing 5 in parallel with the rolling roll 2, and a rack 22 is mounted along the upper surface of the guide beam 21 in parallel with the rolling roll 2. A movable frame 23 having a vertically divided structure is mounted on the guide beam 21 via a liner so as to surround the periphery thereof, and can be moved in the axial direction of the rolling roll 2. Notched.

A moving motor 25 is mounted on the moving frame 23 via a bracket 24, and a pinion 26 at the tip end engages with the rack 22.
By driving the moving motor 25, the pinion 26 rolls on the rack 22, and the moving frame 23 can be moved along the guide beam 21 in the axial direction of the rolling roll 2. As shown in FIG. 5, below the moving frame 23, a pair of guide members 28 having a U-shaped cross section are arranged on both sides in the axial direction of the rolling roll 2 so as to face each other via a bracket 27, and move. They are attached in parallel so as to extend obliquely upward from the frame 23 toward the axis of the rolling roll 2 and downward.

FIG. 5 shows a rear end of the guide member 28.
As shown in the figure, the fixing plate 29 is attached, and at the tip,
As shown in FIGS. 5 to 7, the movable plate 30 is arranged so as to be able to reciprocate along the guide member 28. The fixed plate 29 and the moving plate 30 are connected to rods of a pair of reciprocating drive cylinders 33 each formed by connecting the rear end and the front end of two fluid pressure cylinders 31 and 32.
0 can be advanced toward the rolling roll 2 or retracted into the guide member 28, and an intermediate plate 35 (see FIG. 8) fixed by a stopper 34 provided at an intermediate portion of the guide member 28. ) Supports the reciprocating drive cylinder 33.

As shown in FIGS. 1 to 3, a U-shaped support frame 36 for supporting the grinder mechanism 10 is disposed in front of the movable plate 30, and two guides fixed to the support frame 36 are provided. The rod 37 is inserted through a sleeve 38 attached to the moving plate 30, and is urged by a coil spring 39 so as to be drawn toward the moving plate 30.
It is supported so as to be able to reciprocate to some extent against.

A distal end of a guide pipe 40 disposed in the guide member 28 is fixed to the center of the movable plate 30, and a pressing rod reciprocally mounted on the distal end of the guide pipe 40. 41 is connected to the support frame 36. A compression coil spring 42 is attached to a base end of the pressing rod 41 in the guide pipe 40 so that a spring seat 43 is provided.
The load cell 44 is disposed so as to contact the rear surface of the spring seat 43, and is supported by a load cell support member 46 at the rod end of a pressing force adjusting cylinder 45 fixed to the rear end of the guide pipe 40. ing. Therefore, the support frame 36 moves the moving frame 23 along the guide beam 21 and the moving plate 30 along the guide member 28.
In combination with the above movement, the roll 2 can be reciprocated in the axial direction and can move toward and away from the outer peripheral surface of the roll 2.

The support frame 36 is composed of a fixed frame 47 and a movable frame 48 arranged on both sides, and one end of the grindstone shaft 11 constituting the grinder mechanism 10 is provided at the tip of the fixed frame 47. Portion is rotatably supported, and the base end has a grinding wheel drive motor 12
And the driving force is transmitted through three gears 13, 14, 15. An elastic bush 17 made of rubber or the like is mounted on the grindstone shaft 11 via a bush 16, and an annular grindstone 1 having a bush 18 on the inner periphery.
9 is mounted in a divided manner into four pieces, and the end of the grindstone shaft 11 and the falling off of the grindstone 19 are pressed by the movable frame 48 of the support frame 36.

The movable frame 4 of the support frame 36
Reference numeral 8 denotes an opening / closing cylinder 51 included in a whetstone changing device 50, which can be opened and closed.
The opening / closing cylinder 21 is fixed to the support frame 36, and the rod tip is connected to the base end of the movable frame 48.
The compression coil spring 5 is provided in the opening / closing cylinder 51.
2 is mounted, and the movable frame 48 is always closed to
The movable frame 48 can be opened against the compression coil spring 52 when a working fluid is supplied to the opening / closing cylinder 51. A holding plate 53 that supports the end of the grindstone shaft 11 and presses the side surface of the grindstone 19 is rotatably mounted on the distal end of the movable frame 48 via a bearing 54.

Further, as shown in FIG. 3, the on-line roll grinder 20 is provided with a grindstone and a roll roll cleaning device 55 so that the influence of the shavings accompanying the grinding of the roll 2 does not affect the material 4 to be rolled. The grindstone 19 and the rolling roll 2 are kept clean by spraying water or the like.

Next, this online roll grinder 2
The grinding of the rolling roll 2 by 0 will be described. The moving frame 23 is moved by the moving motor 25 to one end of the rolling roll 2 in the rolling state in the axial direction, and the position of the grindstone 19 of the grinder mechanism 10 at the tip of the support frame 36 is adjusted to the grinding start position. Next, the grindstone 19 is rotated by the grindstone drive motor 12, and the reciprocating drive cylinder 3 is rotated.
3, the moving plate 30 is moved to advance the support frame 36 on which the grindstone 19 is supported toward the outer peripheral surface of the rolling roll 2, and the grinding wheel 19 is pressed against the outer peripheral surface of the rolling roll 2 to start grinding. I do. Then, the moving frame 23 is reciprocated in the axial direction of the rolling roll 2 while moving along the guide beam 21, and is ground according to a required roll profile of the rolling roll 2.

On the other hand, the adjustment of the pressing force of the whetstone 19 against the rolling roll 2 is performed by operating the pressing force adjusting cylinder 45 to extend or contract the rod.
When the rod is extended, the compression coil spring 42 is contracted to increase the repulsive force, and the pressing force increases, and when the rod expands and contracts, the pressing force decreases. The pressing force in this case is detected by the load cell 44, and by using the detection result, the pressing force can be adjusted to an appropriate pressing force.

In this online roll grinder 20, in the grinder mechanism 10, the grindstone 19 is attached to the grindstone shaft 11 via the elastic bush 17, and
The support frame 36 also includes a guide rod 37 and a coil spring 39.
, The shock applied to the grindstone 19 at the time of starting or stopping grinding can be absorbed, and breakage can be prevented as much as possible. Further, since the support frame 36 is supported via the guide rod 37 and the coil spring 39 independently of the moving plate 30 moving along the guide member 28,
As shown in FIG. 4A, the position of the grinding wheel shaft 11 can be changed so as to be inclined with respect to the axial direction of the rolling roll 2,
In addition, since the four divided grinding wheels 19 are mounted on the grinding wheel shaft 11 via the elastic bush 17, each grinding wheel 19 is also inclined with respect to the grinding wheel shaft 11, and is recessed corresponding to the convex portion of the rolling roll 2. Roll 2
Can be efficiently ground in accordance with the shape of Therefore, even when a step D occurs between the threaded portion A and the non-threaded portion B in the rolling roll 2, the stepped portion D can also be ground, and the rolling roll 2 can be kept in an optimal state.

Further, since the four divided grinding wheels 19 are continuously mounted on the grinding wheel shaft 11, there is almost no gap between the grinding wheels 19, so that a continuous grinding surface can be obtained and the roll surface can be ground. it can.

The grindstone 19 of the grinder mechanism 10
The number of divisions is not limited to four in this embodiment.
As shown in (2), it may be divided into two, and the number of divisions may be further increased. Further, the grinder mechanism 10 itself is also used as one unit, and is not limited to grinding from one side of the rolling roll 2, but as shown in FIG. The grinding efficiency can be improved by setting the moving distance of the rolling roll 10 to half of the axial length of the rolling roll 2 or the moving distance can be doubled in the same time as the entire length of the rolling roll 2 in the same time. Can also be improved.

On the other hand, this online roll glider 20
In order to replace the grindstone 19 when the grindstone 19 is damaged or worn, for example, the working fluid is supplied to the opening / closing cylinder 51 of the grindstone exchanging device 50 of the support frame 36, and the working fluid is supplied against the compression coil spring 52. Extend the rod and move the movable frame 48
Is moved to open, a gap is formed between the grinding wheel shaft 11 and the grinding wheel 19 is taken out, and after a new grinding wheel 19 is mounted,
The working fluid is discharged, the movable frame 46 is closed, and the grindstone shaft 11 and the grindstone 19 are returned to a state in which the grindstone 19 is rotatably pressed, so that the grindstone 19 can be easily replaced simply by securing a space in the movable frame 48. Can be.

The present invention is not limited to the on-line roll grinder described in the above embodiment, and the moving mechanism for the roll of the grinder mechanism may be of another type, and can be widely applied to the on-line roll grinder using a grindstone. it can. Further, changes may be made to each component without departing from the scope of the present invention.

[0025]

As described above in detail with the embodiments, according to the online roll grinder of the present invention, the grinding wheel is divided into a plurality of pieces in the axial direction, and both ends of the fixed frame and the movable frame are separated. By tilting the rotating shaft to the supported grinding wheel shaft via an elastic bush, and moving it in parallel, by reducing the width of one grindstone, tilting its rotating shaft or moving in parallel, Even if there are steps or irregularities on the roll surface, it can be ground in accordance with these. Furthermore, by simply moving the movable frame at one end of the grinding wheel shaft, a space can be secured at one end to easily replace the grinding wheel, and there is almost no gap between the grinding wheels, and the roll surface is continuously ground. be able to.

According to the on-line roll grinder of the present invention, the roll surface is ground by preparing two sets of grinder mechanisms that are divided into a plurality and are attached to the grindstone shaft via the elastic bush. The grinding range and grinding time of the grindstone can be halved and grinding can be performed efficiently. Therefore, the surface of the rolling roll can be constantly ground to a smooth state by the grindstone, and a high-quality rolled product can be obtained.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a grinder mechanism according to an embodiment of an online roll grinder of the present invention.

FIG. 2 is a view taken on line AA of FIG. 1 according to one embodiment of the online roll grinder of the present invention.

FIG. 3 is a view on arrow BB of FIG. 1 according to one embodiment of the online roll grinder of the present invention.

FIG. 4 is an explanatory diagram of a grinding state according to an embodiment of the online roll grinder of the present invention.

FIG. 5 is an overall explanatory diagram of an online roll grinder according to one embodiment of the present invention.

FIG. 6 is a plan view of a guide member portion of the online roll grinder according to one embodiment of the present invention.

FIG. 7 is a central vertical view of a guide member portion of the online roll grinder according to one embodiment of the present invention.

FIG. 8 is a view of the online roll grinder according to one embodiment of the present invention, as viewed in the direction of arrows CC in FIG.

FIG. 9 is an explanatory diagram of a state of grinding by a conventional online roll grinder.

[Explanation of symbols]

 Reference Signs List 2 Rolling roll A Passing portion B Non-passing portion D Step portion 10 Grinder mechanism 11 Grinding wheel shaft 12 Grinding wheel drive motor 16 Bush 17 Elastic bush 18 Bush 19 Grinding stone 20 Online roll grinder 36 Support frame 37 Guide rod 40 Guide pipe 47 Fixed side Frame 48 Movable frame

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masaaki Koike 1st Shin-Nakahara-cho, Isogo-ku, Yokohama-shi, Kanagawa Prefecture Ishikawajima-Harima Heavy Industries Co., Ltd. No. 1, Shin-Nakahara-cho, Ishikawajima-Harima Heavy Industries, Ltd.Yokohama No. 2 Factory (72) Inventor Yutaka Osumi No. 1, Shin-Nakahara-cho, Isogo-ku, Yokohama, Kanagawa, Japan Ishikawajima-Harima Heavy Industries, Ltd. 1 at Shin-Nakahara-cho, Isogo-ku, Yokohama-shi, Kanagawa Ishikawajima-Harima Heavy Industries Co., Ltd.Yokohama 2nd factory (72) Inventor Mikio Soya 1 at Kawasaki-cho, Chiba-shi, Chiba Kawasaki Steel Corporation Chiba Works (72) Inventor Takao Yute 1 Kawasaki-cho, Chiba City, Chiba Prefecture Kawasaki Steel Corporation Chiba Works (56) References JP4 41008 (JP, A)

Claims (2)

(57) [Claims] 1. An online roll grinder for grinding a roll being rolled with a grindstone, wherein both ends of a grindstone shaft are rotatably supported by a fixed side frame and a movable side frame which can be opened and closed, and the plurality of grindstones are arranged in an axial direction. Split into
An on-line roll grinder wherein these grinding wheels are mounted on the grinding wheel shaft via elastic bushes. 2. The on-line roll grinder according to claim 1, wherein two sets of grinder mechanisms each including the grinding wheel and the grinding wheel shaft are provided.