JPH05123717A - Rolling roll and rolling mill - Google Patents

Abstract

PURPOSE:To easily maintain and exchange a rolling roll by fitting tightly a sleeve to a roll shaft by shrinkage and forming internal pressure fluid supply routes on fitting places. CONSTITUTION:At least one sleeve 20 is fitted to the roll shaft 10. Parts of rolling wheels 11, 21 are arranged on two positions of the sleeve 20 and another part. The sleeve 20 and the roll shaft 10 are fitted by shrinkage at places other than the insides of the parts of the rolling wheels 11, 21. The internal pressure fluid supply routes 53, 54 are formed on the shrinkage-fitted places. Parts of the rolling wheels 11, 21 are fixed exchangeably. A housing 101 is integrated to one sleeve 20 and other parts through a chock 30. In this way, the roll width can be adjusted quickly and accurately.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling roll (horizontal roll) capable of adjusting a roll width (a distance between shoulders of a rolling wheel portion) for rolling a shaped steel, and a rolling mill provided with the rolling roll. It is a thing.

[0002]

2. Description of the Related Art In a rolling mill for shaped steel, a horizontal roll is sometimes composed of a roll shaft and a sleeve fitted to the outside thereof. As a result, the axial position of the sleeve is changed to change the roll width (the distance between the rolling wheel shoulder provided on the roll shaft and the rolling wheel shoulder provided on the sleeve, or the distance between the rolling wheels of the two sleeves). This is because H-section steels having different web heights can be rolled by changing (1).

An example of the above description is Japanese Patent Laid-Open No. 61-17310. In order to adjust the position of the sleeve in the axial direction, a means for moving and fixing the sleeve with respect to the roll shaft is naturally required. A block (hydraulic cylinder) is provided, and the block is also connected to a sleeve on the roll shaft to move and fix the sleeve.

In addition, there is also an example in which an adjusting screw and a rotation driving mechanism thereof are incorporated in a rolling roll in order to adjust the axial position of the sleeve by feeding the screw in accordance with the rotation of the screw.

[0005]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
The rolling mill described in No. 17310) has the following problems.

A) As the above-mentioned hydraulic block for adjusting the position of the sleeve, it is necessary to dispose a large one having a high output on the rolling roll. During rolling, the sleeve has a considerable rolling reaction force in the axial direction (thrust direction) from the material to be rolled (in the case of a large H-section steel, this may be several hundred tons).
This is because this force is nothing but the force to move the sleeve with respect to the roll axis, and a considerable output is required to counter this.

B) The hydraulic block needs to be mounted on a rolling roll as a spare part as well as a rolling roll which is in use in a rolling mill. When the surface of the roll is worn out, the rolling roll with the roll shaft, sleeve, etc. assembled is taken out from the fixed housing as it is, and another waiting rolling roll is carried in instead. In view of this, quick replacement is required, so that the hydraulic block provided on the roll shaft must be installed in advance at the predetermined position. This means that a large number of large hydraulic blocks are required and the cost is high, and the roll structure is complicated, and the burden of maintenance including replacement is heavy.

On the other hand, even when there is a screw for adjusting the position between the sleeve and the roll shaft, a complicated mechanism is required to drive the screw, and since the mechanism is incorporated into the rolling roll itself, The cost and maintenance burden are not so light that the rolls must be removed when they are replaced.

An object of the present invention is to provide a rolling roll (horizontal roll) which has a simple structure and is easy to replace, as well as a roll which is not provided with a drive mechanism for adjusting the position of the sleeve, and therefore has no driving mechanism therefor. It is to provide a rolling mill capable of adjusting the roll width online by using the rolling mill.

[0010]

According to the rolling roll of the present invention (claim 1), at least one sleeve is fitted to the roll shaft, and at least one sleeve and another portion (that is, another sleeve). (On the roll axis), the rolling roll having rolling wheel portions at two positions, and the sleeve and the roll shaft are fitted by interference fit at a location other than the inside of the rolling wheel portion, and The pressure fluid supply passage to the fitting portion is formed inside. The pressure fluid supply passage is formed, for example, from the end of the roll shaft or the sleeve through the inside thereof.

As for the above-mentioned rolling roll, as described in claim 2, the rolling wheel portion may be exchangeably fixed to the one sleeve and the other portion (that is, the other sleeve or the roll shaft). For this fixing, fitting by interference fit or other means can be taken.

In the rolling mill of the present invention (claim 3), the rolling roll of the above (claim 1 or 2) is used as a horizontal roll on one sleeve and the other portion (that is, on another sleeve or on the roll shaft). And 2) are supported by chocks so that they can rotate freely and cannot move in the axial direction, and they are built into the housing through these chocks, and pressure fluid supply means (such as a pipe that connects to a pump) is connected to the above-mentioned supply path. In addition, the adjusting means for the axial fitting position of the sleeve and the roll shaft is provided for at least one of the chocks. As the adjusting means, any means may be attached to the floor on which the rolling mill is installed, a structure on the floor, the above-mentioned housing, or the like to exert a force on the chock in the axial direction of the rolling roll.

[0013]

In the rolling roll of the present invention (Claim 1), the sleeve is fixed to the roll shaft by the tightening force at the fitting position of the interference fit (that is, regardless of special equipment). Then, in this state, the rolling roll is formed by two rolling wheel portions provided on each of the one sleeve and the roll shaft, or two rolling wheel portions provided on each of the one sleeve and the other sleeve. The steel is rolled.

In order to adjust the roll width (that is, the distance between the shoulders of the two rolling wheel portions) in this rolling roll, fluid pressure is applied to the above-mentioned fitting portion through the pressure fluid supply passage (for example, oil injection is performed). Then, relative movement may be given between the sleeve and the roll shaft at that location. If a fluid pressure exceeding the tightening force (surface pressure) is applied to the entire area of the above fitting points, that point is not inside the rolling wheel section, and the fluid pressure follows the Pascal principle. The inner diameter of is effectively expanded. In this state, the position of the sleeve with respect to the roll axis can be easily adjusted by various means, for example, by an exclusive drive mechanism or by using a simple manually operated jig / tool, even in an online rolling mill, The adjustment is possible even in the offline state taken out from it. After the roll width is changed, the fluid pressure may be reduced to fit and fix the sleeve on the roll shaft. If the above fitting part is inside the rolling wheel part, the thick part prevents the expansion of the inner diameter of the sleeve, and during hot rolling, the roll width is adjusted considering the temperature condition of the part. The inside of the rolling wheel should be avoided as the above-mentioned fitting point because it is necessary to do so.

This rolling roll does not need to be provided with a drive mechanism such as a sleeve on the rolling roll itself because the roll width can be easily adjusted by various methods as described above. Therefore, there is an advantage that the structure of the part to be replaced is simple and the replacement work can be easily performed.

In the rolling roll according to the second aspect of the invention, since the rolling wheel portion, which is likely to wear due to contact with the material to be rolled, can be replaced independently, the rolling roll has a long life. In other words, if only the rolling wheel portion that has worn, deformed or cracked is replaced, the other portion that is less consumed can be used for a long period of time.

A rolling mill of the present invention (claim 3) includes the above-mentioned rolling roll as a horizontal roll, and a means for supplying pressure fluid between the roll shaft and the sleeve (fitting place of the interference fit) and a chock. Since the sleeve fitting position adjusting means is provided, the roll width can be adjusted very easily, and maintenance work of the rolling roll is also easy. That is, the roll width is adjusted by supplying the pressure fluid from the supply means to the fitting position of the interference fit through the pressure fluid supply passage and at the position between the roll shaft and the sleeve through the chock by the adjustment means. Should be changed. Since the chock, that is, the bearing box supports the rolling roll via the bearing, the roll width adjustment can be performed even while the rolling roll is rotating, for example. Further, the fitting position adjusting means is not provided on the rolling roll itself, only the rolling roll can be removed without removing the adjusting means, and the connection between the rolling roll and the pressure fluid supply means can be released. Since it is easy, in the rolling mill of the present invention, the rolling roll is maintained (including removal / installation) separately from the adjusting means and the feeding means, that is, in an advantageous state in terms of cost and workability. You can

In this rolling mill, since the fitting position adjusting means between the sleeve and the roll shaft is provided in the portion other than the rolling roll as described above, it is easy to enhance the roll width adjusting ability including the speed. In this respect, when the rolling roll itself is provided with such means as in the past, it is not possible to give sufficient ability to the means due to restrictions on size and weight, and it is not possible to quickly adjust the roll width. In contrast to what is possible.

[0019]

FIG. 1 is a view showing a rolling mill and rolling rolls as a first embodiment of the present invention, and FIG. 1 (a) shows a part of the rolling mill in a horizontal cross section along the rolling roll 1. b)
[Fig. 3] is an enlarged view of a b portion in the same (a). This rolling mill is H
This is a universal mill for rolling shaped steel, and in addition to the roll 1 shown, another horizontal rolling roll (not shown) paired in parallel with the roll 1 is provided, and the shafts are arranged vertically on both sides thereof. Roll with two vertical rolls (same). The distance W1 between the outer shoulders 11a, 21a of the rolling wheels (body) 11 and 21 in the center of the figure is the so-called roll width, and the web height of the H-shaped steel to be rolled (inner)
Becomes

The rolling roll 1 has a roll shaft 10 and a sleeve 20 fitted together as shown in FIG.
-It is supported by two chocks 30 and 40 provided on both outer sides of 21. The roll shaft 10 and the sleeve 20 are fitted to each other by sliding them to change the dimension of the distance W1 and rolling various H-section steels having different web heights without replacing the roll 1. This is because. The rolling torque is transmitted from the roll shaft 10 to the sleeve 20 by the frictional force due to the interference fit between the two, and the relative rotation between the both does not occur. The key 12 is interposed between the two (or they may be connected by a spline) to ensure the transmission of the rolling torque. In addition, rolling wheel 11.2
1 is integrated on the outer periphery of the roll shaft 10 and the sleeve 20 by shrink fitting. The end portion 13 of the roll shaft 10 is a connection portion to a rotary drive source (not shown) including a motor and the like.

As for the chocks 30 and 40, the main body is inserted between the fixed housings 101 of the rolling mill so as not to rotate (movable in the axial direction), and the rolls 1 are respectively inserted inward through the bearings 31 and 41. Is rotatably supported. It should be noted that the chock 30 directly supports the outer circumference of the sleeve 20 and the chock 40 supports the roll shaft 10, and each chock 30/40 supports a radial load and a sufficient thrust load.

In order to freely set the above-mentioned interval W1, that is, to move and fix the sleeve 20 with respect to the roll shaft 10, the rolling mill is provided with the following configurations 1) and 2).

1) Roll shaft 10 and sleeve 2 on the outside thereof
A fitting portion by interference fit is provided in a part of 0, and oil injection (hydraulic pressure can be applied) between the fitting surfaces of the fitting portion. In this example, the area of the interference fit is a portion inside the chock 30 and the inside of the rolling wheel 21 is an intermediate fit (a slight interference or a fit with a gap). Then, on the surface of the roll shaft 10 at the position of the interference fit, as shown in FIG.
An annular pressurizing space 55 is provided as shown in (b), and pressure fluid supply passages 53, 54 are formed inside the roll shaft 10 so as to have an opening in the space 55, and at the end of the supply passage 53. A hydraulic pipe 51 connected to a hydraulic pressure source (not shown) is connected as a pressure fluid supply means 50 via a rotary joint 52.

Since the sleeve 20 is fixed on the roll shaft 10 by a considerable interference fit force, the rolling wheel 11
Even if a large rolling reaction force (thrust force in the direction of bringing the shoulders 11a and 21a closer) is applied to 21, no deviation occurs between the roll shaft 10 and the sleeve 20. On the other hand, the above-mentioned supply means 50
When oil injection is performed between the fitting surfaces by, for example, the interference fit fitting between the roll shaft 10 and the sleeve 20 is loosened, and relative movement in the axial direction between them becomes easy. At this time, the outer diameter of the sleeve 20 expands, but the amount is small and fits into the fitting gap with respect to the bearing 31, so there is no problem. Since the rolling reaction forces during rolling oppose each other in the axial direction (left and right in the drawing) and almost cancel each other out, thrust applied to the chocks 30 and 40, and further to fitting position adjusting means 110 and 120 described later. The load is significantly smaller than the absolute value of rolling reaction force.

2) The fitting position adjusting means 110 and 120 configured to be extendable and retractable are attached to the fixed housing 101, and the fitting positions adjusting means 110 and 120 are engaged and disengageably engaged with the chocks 30 and 40 and the brackets 32 and 42 which are integral with each other. There is. The adjusting means 110 on the side of the chock 30 includes a base portion 111 fixed to a fixed housing and a tip portion 1 engaging with the bracket 32.
12, and a hydraulic cylinder 113 or the like between them, which is provided outside (closer to the center of the shaft) than the chock 30 and has a keeper plate 112a, which is engageable with the recess 32a of the bracket 32, at the tip 112. Cylinder 112b
Attached to the telescopic end of. As for the adjusting means 120 on the other side of the chock 40, the base portion 121 and the tip portion 122 are also included.
The hydraulic cylinder 123 and the like are similarly configured, and the hydraulic cylinder 122b and the keeper plate 122a engageable with the recess 42a of the bracket 42 are provided at the tip portion 122. The hydraulic cylinders 113 and 123 may be other actuators (for example, an electric type or a screw mechanism) as long as they can expand and contract.
The output is significantly smaller than the rolling reaction force for the above reason.

When the oil injection is performed according to the above 1), when the cylinder 113 of the adjusting means 110 is expanded and contracted from the state shown in the figure, the sleeve 2 together with the chock 30 is formed.
0 moves in the axial direction, and the cylinder 123 of the adjusting means 120 is moved.
The roll shaft 10 moves together with the chock 40 when the roll is expanded and contracted.

The tip ends 112 and 122 of the adjusting means 110 and 120 are detachable from the brackets 32 and 42, respectively, and the keeper plates 112a and 122a are separated from the brackets 32 and 42 when the cylinders 112b and 122b are contracted. And evacuate to the outside. In this retracted state, for example, by disconnecting the pipe 51 and the joint 52, the rolling roll 1 to be replaced (that is, the roll shaft 10 with the sleeve 20 and the rolling wheels 11 and 21 assembled) together with the chocks 30 and 40. , Adjusting means 11
It can be carried out from the fixed housing 101 separately from 0.120. At this time, the adjusting means 110 and 120 remain on the housing 101 without being carried out, and the tip portion 11 is left with respect to the chock of the rolling roll which is newly carried in later.
2.122 engages. In other words, in this rolling mill,
The roll 1 can be exchanged with almost no equipment for moving and fixing between the roll shaft 10 and the sleeve 20. The chocks 30 and 40 are detached and attached to the roll 1 taken out from the rolling mill as needed, but this work is also performed in a conventional manner without any special difficulty.

In this rolling mill constructed as described in 1) and 2) above, the rolling wheels 11 and 21 (shoulder 11a
The procedure for changing the interval W1 in 21a) to W2 is as follows.

As shown in FIG. 1, adjusting means 110 and 120
Each tip 112, 122 (keeper plate 112a
122a) engaged with the brackets 32 and 42, respectively, by the pressure fluid supply means 50.
Oil injection is performed into the space 55 through 54.

By contracting the cylinders 113 and 123 of the adjusting means 110 and 120 by (W1-W2) / 2, respectively, the sleeve 2
Move 0 to the left and roll shaft 10 to the right to move the rolling wheels 11.2
The interval of 1 is set to W2.

Stop the cylinders 113 and 123,
The oil injection is stopped (the fluid pressure is lowered), and the roll shaft 10 and the sleeve 20 are returned to the interference fit state and fixed.

By the way, in the above first embodiment, the fitting position adjusting means 110 or 120 is provided in the housing 101 for both of the chocks 30 and 40.
Actually, the fitting position adjusting means having the expansion / contraction function can change the interval W1 only by providing it on either one of the chocks 30 or 40. FIGS. 2 and 3 show rolling mills in which adjusting means are provided only between the chock on one side and the housing as second and third embodiments, respectively.

First, in the rolling mill of FIG. 2 (second embodiment),
The adjusting means 110 is provided only for the chock 30 that directly supports the sleeve 20, and the chock 40 on the side that supports the roll shaft 10 does not have an expansion / contraction function, and is simply the chock 4.
Stop means 130 for fixing the zero reference position is fixed to the housing 101. The stopping means 130 is a hydraulic cylinder 1 having a keeper plate 132a attached to the expandable end.
32 b, and generally has only the function of the tip 122 of the adjusting means 120. That is, if the cylinder 132b is extended, the keeper plate 132a can be engaged with the recess 43a of the bracket 43 integral with the chock 40, and if the cylinder 132b is contracted, the plate 132a is separated from the bracket 43 and retracts outward. ..

The procedure for changing the distance W1 between the rolling wheels 11 and 21 in the rolling mill of FIG. 2 is as follows.

Adjusting means 110 and stopping means 130
The respective keeper plates 112a and 132a are engaged with the brackets 32 and 43 as shown.

Oil injection is performed between the fitting surfaces of the roll shaft 10 and the sleeve 20 through the pressure fluid supply passage 53.

The cylinder 113 of the adjusting means 110 is expanded and contracted, and the sleeve 20 together with the chock 30 is slid in the axial direction, so that a predetermined gap W2 is provided between the rolling wheels 11 and 21.

The cylinder 113 is stopped and the oil injection is stopped.

Since the centers of the rolling wheels 11 and 21 are deviated only by moving the sleeve 20, the plate 132a of the stopping means 130 is separated from the bracket 43, and the cylinder 113 is slightly expanded or contracted. (Half of the above) Put back and perform center alignment.

During rolling, the plate 13 of the stopping means 130
Since 2a cannot engage with the recess 43a of the bracket 43, the force of the adjusting means 110 stops the axial movement of the rolling roll 1 with respect to the housing 101. As described above, the force that tries to move the absolute position of the rolling roll 1 out of the rolling reaction force is small, so this does not cause a problem. After that, in order to further change the interval W2, the state in which the roll 1 is moved by the adjusting means 110 is reproduced, and then the following procedure is followed.

The center of the rolling line and the roll width (rolling wheel 1
The alignment with the center of the interval W1 or W2 of 1.21 may not be necessary in some cases, but in that case, the above operation is unnecessary.

On the other hand, in the rolling mill of FIG. 3 (third embodiment), the fitting position adjusting means 120 is provided only for the chock 40 on the roll shaft 10 side, and for the other chock 30,
Stopping means 1 having the same structure and function as the stopping means 130
40 is fixed to the housing 101. Also in this rolling mill, the rolling wheel 11
The interval W1 of 21 can be changed. However, since the roll shaft 10 is moved instead of the sleeve 20 to adjust the distance W1 (for example, W2 as shown in the drawing),
It is necessary to appropriately read the procedure of.

Incidentally, in addition to the examples introduced above, the rolling roll and rolling mill of the present invention can be carried out in various modes. For example, it is also possible to fit two sleeves on the roll shaft and provide rolling wheel portions on each sleeve. In that case, if the fluid pressure supply path and the supply means are configured so that the fluid pressure can be separately applied to each of the fitting positions of the interference fit between the roll shaft and each sleeve, exactly as described above, The fitting position, that is, the interval between the rolling wheels (roll width) can be adjusted. Although the rolling wheel portion may be exchangeably fixed to the roll shaft or the sleeve as shown in FIG. 1 (first embodiment),
It is also possible to integrate them with (second embodiment) and FIG. 3 (third embodiment).

[0044]

In the rolling roll according to the first aspect of the present invention, the roll width can be easily adjusted, and it is not necessary to equip itself with a drive mechanism (fitting position adjusting means) for the adjustment. Therefore, the structure is simple. Therefore, there is an advantage that a spare (replacement) rolling roll can be arranged at a low cost without attaching such a mechanism, and the rolling roll can be easily maintained and replaced.

The rolling roll according to claim 2 can be used for a long period of time by replacing only the rolling wheel portion according to wear. This is nothing but reduction of the cost required for rolling.

The rolling mill of the present invention (claim 3) has the following effects.

1) In relation to roll width adjustment, roll axis
High power (capacity) equipment is not required as a means for moving and fixing the sleeves.

2) The roll width can be adjusted online and while the rolling roll is rotating. Therefore, for example, reverse rolling in which the roll width is changed between passes (between the end of a certain pass and the next pass) can be realized.

3) Since the fitting position adjusting means is provided in a part other than the rolling roll and it is easy to give it a high ability, the roll width can be adjusted quickly and accurately. This means that the rolling efficiency is improved together with the above 2), and particularly in the hot rolling step, rolling can be performed while the temperature drop of the material to be rolled is small.

4) Unlike the conventional roll width adjustment based on the roll shaft or sleeve, not only the relative position between the two, but also the absolute position of the rolling roll, that is, the position adjustment of the roll with respect to the entire rolling line. Is possible.

5) Since the rolling roll can be detached from the rolling mill separately from the fitting position adjusting means, it is advantageous in terms of cost and workability regarding maintenance of the rolling roll.

[Brief description of drawings]

1 is a view showing a part of a rolling mill in a horizontal section along a rolling roll according to a first embodiment of the present invention, and FIG.
[Fig. 3] is an enlarged view of a portion b in Fig. 4 (a).

FIG. 2 is a view showing a horizontal section of a rolling mill in the same manner as described above according to the second embodiment of the present invention.

FIG. 3 is a drawing also showing a horizontal cross section according to the third embodiment of the present invention.

[Explanation of symbols]

 1 Rolling Roll 10 Roll Shaft 20 Sleeve 30/40 Chock 50 Pressure Fluid Supply Means 53/54 Pressure Fluid Supply Path 101 Housing 110/120 Fitting Position Adjusting Means

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] November 14, 1992

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

[Figure 1]

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Zun Furukawa, Marunouchi 1-2-2, Chiyoda-ku, Tokyo Japan Steel Pipe Co., Ltd. (72) Masayoshi Matsuda 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Main Steel Pipe Co., Ltd. (72) Inventor Misao Harahara 1-2-2 Marunouchi, Chiyoda-ku, Tokyo Japan Steel Pipe Co., Ltd. (72) Inventor Hiroshi Asari 3-1, Higashikawasaki-cho, Chuo-ku, Kobe-shi, Hyogo No. 1 Kawasaki Heavy Industries, Ltd. Kobe factory (72) Inventor Masatoshi Fukuda 3-1-1 Higashikawasaki-cho, Chuo-ku, Kobe-shi, Hyogo Prefecture Kawasaki Heavy Industries Ltd., Kobe factory (72) Ryoichi Yamase Central Kobe-shi, Hyogo Prefecture 3-1-1 Higashikawasaki-cho, Tokyo Kawasaki Heavy Industries Ltd. Kobe factory

Claims (3)

[Claims] 1. A rolling roll having at least one sleeve fitted to a roll shaft and having rolling wheel portions at two positions on the one sleeve and the other portion, the rolling roller being provided inside the rolling wheel portion. A rolling roll characterized in that a sleeve and a roll shaft are fitted together by an interference fit at a location, and a pressure fluid supply path to the fitting location of the interference fit is formed inside. 2. The rolling roll according to claim 1, wherein the rolling wheel portion is exchangeably fixed to the one sleeve and the other portion. 3. The rolling roll according to claim 1 or 2 is rotatably supported by a chock at two locations on a sleeve and the other portion and is immovably supported in the axial direction. Rolling characterized by being incorporated into a housing via a pressure fluid supply means connected to the above-mentioned supply passage and adjusting means for adjusting the axial fitting position of the sleeve and the roll shaft to at least one chock. Machine.