JPH0615801U - Rolling mill - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a rolling mill capable of changing the roll width and having a rest bar preferable for the function and configuration of the rolling mill. [Structure] A sleeve 20 having a rolling wheel 21 is fitted on a roll shaft 10 so as to adjust relative positions in the axial direction to form a rolling roll 1 for shaped steel, and the rolling roll 1 is
The sleeve 20 and the roll shaft 10 are supported by the chocks 30 and 40 so as to be rotatable only. Also, the convex portions 63 of each other
The split pieces 61, 62 of the pair of rest bars 60, which are engaged with each other by the recesses 64 so as to be relatively movable only in the direction parallel to the axis of the rolling roll 1, are attached to the respective chocks 30, 40.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling mill for shaped steel, and more particularly, to a rolling mill in which a sleeve is fitted on the roll shaft of a rolling roll so that the relative position can be adjusted in the axial direction.

[0002]

[Prior art]

 A rolling mill as shown in FIG. 4 is used as a horizontal roll in a rolling mill for producing H-section steel and the like. That is, there is a portion 11 which should also be called a rolling wheel (body) in the middle, and two outer portions thereof are respectively supported by a chock (bearing box) 30.40 containing a bearing (not shown). It is a roll. Two sets of such rolling rolls 1 are provided in parallel in the vertical direction, and two vertical rolls (not shown) are arranged in the vertical direction on both sides thereof to roll the H-section steel or the like. The distance W1 between the outer shoulders of the rolling wheel portion 11 is the so-called roll width, which is the web height (inward) of the H-section steel to be rolled.

In such a rolling mill, a connecting member generally called a rest bar is bridged between two chocks. As shown in Fig. 4, the rest bar 60 'connects the two chocks 30 and 40 and has the function of increasing the rigidity in the rolling mill. The main purpose of this is to install the stripper guide 70' as shown in the figure. It is to install. The stripper guides 70 'are provided in front of and behind the rolling roll 1 (inlet / outlet side) to facilitate the supply and discharge of products to and from the roll 1. It is installed near the center (middle between the chocks 30 and 40).

By the way, in recent years, regarding rolling mills for shaped steel, it is often proposed that a horizontal rolling roll is constituted by a roll shaft and a sleeve fitted to the outside thereof. A part of the rolling wheel is formed on the sleeve, and the position of the sleeve on the roll axis is changed to change the roll width (for example, the distance between the rolling wheel shoulder on the roll axis and the rolling wheel shoulder on the sleeve). By changing the above, H-shaped steels with different web heights will be rolled. In such a case, it is better to support the outer circumference of the sleeve and other parts with chocks so that they can rotate freely but do not move relative to each other in the axial direction, and adjust the position of the sleeve with respect to the roll axis for each chock. It is said that Japanese Unexamined Patent Publication No. 61-17310 discloses one of such rolling mills.

[0005]

[Problems to be solved by the device]

 When changing the roll width by changing the position of the sleeve for each chock as described above, no suitable countermeasure has yet been shown as to what to do with the above-mentioned rest bar. The above-mentioned official gazette does not make any mention of this point.

When a rest bar, for example, exactly the same as that shown in FIG. 4 is attached, the chock cannot be moved in the axial direction and the position of the sleeve cannot be adjusted. However, if it is eliminated, it becomes extremely difficult to attach the stripper guide, and the product may not be fed smoothly. Also, if the rest bar is simply divided (for example, divided into two near the center and attached to the left and right chocks), each divided rest bar will be attached to each chock in a cantilevered form. May overload the chock. In other words, when a load is applied to the stripper guide, a large bending moment acts on each chock via the cantilevered rest bar. For this reason, it may be necessary to add considerable strength (rigidity) to the chock and the rest bar. As described above, it can be said that the problem of the rest bar is directly related to the essential function or configuration of the rolling mill.

The object of the present invention is to change the roll width by changing the chock while enabling the change of the roll width and the attachment of the rest bar-stripper guide which is preferable for the function and structure of the rolling mill. It is an object of the present invention to provide a rolling mill having a rest bar that can smoothly handle and can easily deal with mechanical balance.

[0008]

[Means for Solving the Problems]

 The rolling mill of the present invention is a rolling mill in which a rolling roll having a rolling wheel portion for rolling a shaped steel is supported by two chocks, and a rest bar is attached between both chocks. A sleeve having a part is fitted on the roll shaft so that the relative position in the axial direction can be adjusted to form a rolling roll, and such rolling roll can be freely rotated only between one sleeve and the other part. And b) each pair of rest bars attached to each chock so as to be relatively movable only in the direction parallel to the axis of the rolling roll by the respective convex portions and concave portions.

[0009] With regard to this rolling mill, as described in claim 2, c) each of the above-mentioned rest bars is provided with a shim to enable position adjustment in a direction parallel to the axis of the rolling roll. Then, attach the stripper guide.

Further, for example, as described in claim 3, d) the sleeve is fitted onto the roll shaft by an interference fit, and the pressure fluid supply path to the fitting portion of the interference fit is provided on the roll shaft. It is preferable that it is formed inside, and e) the pressure fluid supply means is connected to the above-mentioned supply passage, and the axial position adjustment means is provided for at least one chock.

[0011]

[Action]

 In the rolling mill of the present invention, firstly, the roll width (that is, the distance between the shoulder of the rolling wheel portion of the sleeve and the shoulder of the other rolling wheel portion) can be changed by the configuration of the above a). The chock rotatably supports the outer circumference of the sleeve (it cannot move in the axial direction), so moving the chock in the axial direction also moves the sleeve in the axial direction on the roll shaft (relative position adjustment). The roll width is also changed by moving part of the rolling wheel of the sleeve.

Secondly, in this rolling mill, despite the distance between the chocks changing due to the above, a rest bar having a role of installing a stripper guide or the like is attached between the chocks according to the above b). To be The reason why the rest bar of b) can cope with the change in the chock interval is that the pair of rest bars can move relative to each other in the direction parallel to the axis of the rolling roll. Moreover, since this rest bar is engaged between the convex and concave portions so as not to move relative to other than the direction parallel to the above-mentioned axis, it is difficult to displace even if a load is applied in the vertical direction, and it is of a simple split type. It does not transmit a large bending moment to the chock, unlike the ones (mentioned above, which can be attached to the chuck in a cantilever form). This is because the tip parts of the rest bars (parts that extend from the top of the chock and face each other) do not undergo relative displacement except in the direction parallel to the axis due to the above engagement, so they are received from the product or stripper guide. This is because the rest bar functions as one rigid body (that is, similar to the rest bar 60 ′ in FIG. 4) against a vertical load.

In a rolling mill according to a second aspect of the present invention, a stripper guide is attached to each of the pair of rest bars as described above to guide a shaped steel product, and the position of the stripper guide is the axis of the rolling roll. It can be adjusted (position changed) in a direction parallel to the heart. That is, the stripper guide is attached to each rest bar via a shim, and the position of the stripper guide with respect to the rest bar can be changed by changing the thickness of the shim (or changing its arrangement). .

In the case of a rolling roll, the width of the rolling wheel may be changed by reworking (grinding, etc.) the end portion of the rolling wheel. Therefore, even if the position of the sleeve with respect to the roll axis is the same, the roll width may not be the same. If the position of the stripper guide can be adjusted as described above, the stripper guide can be provided at the optimum position even when the roll width changes due to such reworking. This is because, according to the above, the position of the stripper guide can be freely determined in addition to the positional relationship between the pair of rest bars which is located at the relative position between the roll shaft and the sleeve. The ability to adjust the position in this way is nothing but the smooth guidance of the product without the need to process the stripper guide in accordance with the rework of the rolling wheel.

Further, the rolling mill according to claim 3 has the following actions. That is, 1) The sleeve is fixed to the roll shaft by the tightening force at the fitting position by the interference fit of the above d) (that is, regardless of special equipment). Then, in this state, the rolling roll is supported by the chock of the above a) and rotates, and the shaped steel is rolled by the action of the rolling wheel portion on the sleeve or the like. Due to the above-mentioned tightening force, the rolling mill does not require the supporting means (hydraulic block, etc.) for the axial rolling reaction force, which was conventionally required.

2) The roll width (that is, the distance between the shoulders of the rolling wheels) is adjusted by applying a fluid pressure from the pressure fluid supply means of e) through the pressure fluid supply passage of d) (for example, oil injection is performed). ), In that state, move the sleeve together with the chuck in the axial direction on the roll by the position adjusting means of the same e). In other words, the fluid pressure exceeding the tightening force (surface pressure) is applied to the entire area of the above-mentioned fitting position to expand the inner diameter of the sleeve, and then the fitting position of the sleeve with respect to the roll shaft is changed. After such position adjustment is completed, the fluid pressure is reduced and the sleeve is fitted / fixed on the roll shaft, resulting in the state of 1).

3) Although the roll width can be adjusted extremely easily as described above, the rolling roll is supported by the chock rotatably and immovably in the axial direction via the bearing as described in a) above. Therefore, the roll width adjustment described above can be performed, for example, while the rolling roll is rotating.

4) As shown in e), the means for adjusting the axial position is provided in a portion other than the rolling rolls (ie, the chocks), and it is not necessary to attach reaction force supporting means (hydraulic block, etc.) to the rolling rolls. The structure of the rolling roll itself, which is the replacement part, is simple, lightweight and compact.

5) Since the rest bar is attached to the rolling mill having the above-mentioned features 1) to 4) as described in b) above, in the rolling mill according to claim 3, the stripper guide can be easily installed. As a result, the mechanical load on the chock does not become excessive, and the roll width can be adjusted easily and quickly at any time (while the rolling roll is rotating). This is nothing but the easy (and therefore low-cost) production of shaped steel products of various sizes.

[0020]

【Example】

 1 to 3 show an embodiment of the present invention. FIG. 1 (a) is a diagram showing a part of a rolling mill as an embodiment in a horizontal cross section (II of FIG. 2) along a product pass line, and FIG. 1 (b) shows the same rolling mill horizontal. It is shown in a horizontal cross section along the different rolling roll 1. Further, FIG. 2 is a view of the two rolling rolls 1 and the like viewed from the front of the rolling mill, and FIG. 3 is a cross-sectional view (III-III in FIG. 2) of the rolling rolls 1 and the like viewed from the side. Is.

This rolling mill is a rolling mill for obtaining H-shaped steel, and includes two rolling rolls 1 shown in FIGS. 2 and 3, and two rolling rolls 1 arranged on both sides of the rolling rolls 1 with vertical axes. Rolling is performed with the vertical rolls (not shown). The distance W1 between the outer shoulders 11a and 21a of the rolling wheels (body) 11 and 21 in the center of FIG. 1 (b) is the so-called roll width, and the web height of the rolled H-section steel (inner ).

The rolling roll 1 has a roll shaft 10 and a sleeve 20 fitted together as shown in FIG. 1 (b), and has two chocks 30 and two chocks 30 provided on both outer sides of the rolling wheels 11 and 21. It is supported by 40. The roll shaft 10 and the sleeve 20 are fitted to each other by sliding them to change the dimension of the interval W1 and rolling various H-section steels having different web heights without replacing the roll 1. This is because It should be noted that the rolling torque is transmitted from the roll shaft 10 to the sleeve 20 by the frictional force due to the interference fit (described later) between the both, and the relative rotation between the two does not occur. The key 12 is interposed between the sleeve 20 and the sleeve 20 (the two may be connected by a spline) to ensure the transmission of rolling torque. The rolling wheels 11 and 21 are integrated onto the outer circumferences of the roll shaft 10 and the sleeve 20 by shrink fitting. The end portion 13 of the roll shaft 10 is a connecting portion to a rotary drive source (not shown) including a speed reducer, 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 and the rolls 1 and 41 are inserted inwardly through the bearings 31 and 41, respectively. Is rotatably supported. The chocks 30 directly support the outer circumference of the sleeve 20, and the chocks 40 support the roll shaft 10. Each of the chocks 30 and 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, this rolling mill is provided with the following configurations 1) to 3). .

1) The roll shaft 10 and a part of the sleeve 20 on the outer side of the roll shaft 10 are provided with a fitting portion by an interference fit so that oil injection can be performed between the fitting surfaces of the fitting portion. I have to. In this example, as shown in FIG. 1 (b), the part of the tight fit is the part inside the chock 30 and the inner part of the rolling wheel 21 is the intermediate fit (fitting with slight tightening margin or gap). I chose An annular pressurizing space 55 is provided on the surface of the roll shaft 10 at the position of the interference fit, and the pressure fluid supply passages 53 and 54 are provided inside the roll shaft 10 so that the space 55 has an opening. A hydraulic pipe 51 connected to a hydraulic pressure source (not shown) as a pressure fluid supply means 50 is connected to an end of the supply path 53 via a rotary joint 52.

Since the sleeve 20 is fixed on the roll shaft 10 with a considerable interference fit force, a large rolling reaction force (a thrust force in a direction to bring the shoulders 11a and 21a closer) to the rolling wheels 11 and 21 during rolling. Even if the force acts, no deviation occurs between the roll shaft 10 and the sleeve 20. On the other hand, when oil injection is performed between the fitting surfaces by the supply means 50 or the like, 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 thereof is small and is accommodated in the fitting gap with respect to the bearing 31, so that there is no problem with the bearing 31. Since the rolling reaction forces during rolling oppose each other in the axial direction (left and right in the figure) and most of them cancel each other out, the chocks 30 and 40, and further the fitting position adjusting means 110 and 120 to be described later, are performed. Such thrust load is significantly smaller than the absolute value of rolling reaction force.

2) Fitting position adjusting means 110 and 120 that are configured to be extendable and retractable are attached to the fixed housing 101 as shown in FIG. 1B, and the shift arms 32 and 42, which are integral with the chocks 30 and 40, respectively. Is engaged with and disengaged from. The adjustment means 110 on the side of the chock 30 includes a base portion 111 fixed to the fixed housing 101, a hydraulic cylinder cylinder 112 for clamping having a tip end portion 112a engaging with the shift arm 32 at a telescopic end, and a hydraulic cylinder cylinder for shifting between the two. It is composed of 113 and the like, and is provided outside of the chocks 30 (close to the opposite axis). The adjusting means 120 on the side of the other chock 40 is also configured in the same manner by the base 121, the hydraulic cylinder 122 for clamping, the hydraulic cylinder 123 for shifting, etc., and the tip 122a can be engaged with the recess 42a of the shift arm 42. I did it. Note that the hydraulic cylinders 113 and 123 may be other actuators (for example, an electric actuator or a screw mechanism) as long as they can expand and contract, but the output thereof is more than the rolling reaction force due to the above reason. It can be significantly smaller.

When oil injection is performed by the configuration of 1) above, when the cylinder 113 of the adjusting means 110 is expanded and contracted from the state shown in the figure, the sleeve 20 moves axially together with the chock 30 and the cylinder of the adjusting means 120. When 123 is expanded and contracted, the roll shaft 10 moves together with the chock 40.

In the adjusting means 110 and 120, the tip portions 112a and 122a can be engaged with and disengaged from the shift arms 32 and 42, respectively, and when the cylinders 112 and 122 are contracted, the tip portions 112a and 122a correspond to the shift arms 32 and 42. Move away and evacuate to the outside. In this retracted state, for example, by disconnecting the pipe 51 and the like, 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 and the adjusting means 110. It can be carried out of the fixed housing 101 separately from the fixed housing 120. At this time, the adjusting means 110, 120 remain on the housing 101 without being carried out, and the tip portions 112a, 122a engage with the chock of the rolling roll that is newly carried in later. In other words, in this rolling machine, the roll 1 can be replaced with almost no additional device for moving and fixing the roll shaft 10 and the sleeve 20. The chocks 30 and 40 are removed and attached to the roll 1 taken out from the rolling mill as needed, but this work is also performed in the same manner as before without any special difficulties. It

3) As shown in FIG. 1 (a), stripper guides 70 (71, 72) are provided on the inlet side and the outlet side of the rolling roll 1 to guide the H-shaped steel before and after rolling by this rolling mill. However, in this rolling mill, the rest bar 60 is installed between the chocks 30 and 40 even if the distance between the chocks 30 and 40 changes with the change of the distance W1. It was handed over and the guide 70 was attached to it. These are suitable as means for supporting the guides 70 (total of four pairs of entrance / exit and top / bottom) other than the rest bars 60 (four pairs) provided between the chocks 30 and 40. However, in order to attach the rest bar 60 between the chocks 30 and 40 with varying distances, this rolling mill has the following configuration.

That is, as shown in FIGS. 1A and 2, the rest bar 60 is divided into left and right split pieces 61 and 62, and a guide rod 63 (projection) and its insertion hole 64 (recess) are provided respectively. It was provided to engage both. The guide rod 63 and the insertion hole 64 are provided at two locations for each pair of the divided pieces 61 and 62 of the rest bar 60 and are slidable in the longitudinal direction (the gap in the direction perpendicular to the longitudinal direction is on the order of 0.1 mm). The longitudinal direction is parallel to the axis of the rolling roll 1, that is, coincides with the moving direction of the chocks 30 and 40. With such a structure, the rest bar 60 expands and contracts in accordance with the change in the distance between the chocks 30 and 40, and also behaves as a rigid body with respect to the load in the vertical direction (downward in FIG. 2). Therefore, the load from the stripper guides 71 and 72 can be sufficiently supported, and the strips can be stably attached between the chocks 30 and 40. In addition, as shown in FIG. 1 (a), the heights (vertical position in FIG. 2) of the base end portions 61a and 62a of the respective divided pieces 61 and 62 are adjusted in the grooves provided in the chocks 30 and 40. In addition, it is configured so that it can be fixed.

The rest bar 60 is thus provided between the chocks 30 and 40 of the upper and lower rolling rolls 1, and stripper guides are provided on the lower surface of the upper rest bar 60 and the upper surface of the lower rest bar 60 as shown in FIGS. 2 and 3. 71 and 72 are attached. The guides 71 and 72 are also split into right and left and fixed to the split pieces 61 and 62 of the rest bar 60, but the positions of the outer end surfaces 71a and 72a are set on the outer shoulders of the rolling wheels 11 and 21. If the positions 11a and 21a are adjusted in advance (the distance LH in FIG. 2 is adjusted to the distance W1), the H-section steel can be guided as shown by the phantom line in the center of FIG. Moreover, even when the chocks 30 and 40 are moved to change the distance W1, the readjustment of the positions of the guides 71 and 72 is not necessary.

When attaching the stripper guides 71 and 72 to the rest bar 60 (divided pieces 61 or 62), in addition to bolts and nuts (not shown) for fastening, a cotter 76 shown in the drawing of FIG. And Shim 77 was also used. In the figure, the shim 77 is arranged only on the right side of the cotter 76, but if a part of the shim 77 is moved to the left side of the cotter 76, the guide 72 (71 The same) can be changed (position in the axial direction of the roll 1). Since the position can be changed in this way, even when the shoulders 11a and 21a of the rolling wheels 11 and 21 in the roll 1 are dressed (reworked by polishing, etc.), the end faces 71a and 72a of the guides 71 and 72 can be changed. No need to process.

In this rolling mill configured to include the above 1) to 3), the procedure for changing the interval W1 between (the shoulders 11a and 21a of) the rolling wheels 11 and 21 of the roll 1 to W2 is as follows. is there.

As shown in FIG. 1B, the tip portions 112a and 122a of the adjusting means 110 and 120 are engaged with the shift arms 32 and 42, respectively, and in this state, the pressure fluid supplying means 50 causes the supply passage 53・ Oil injection into the space 55 through 54.

By contracting the cylinders 113 and 123 of the adjusting means 110 and 120, respectively, by (W1-W2) / 2, for example, the sleeve 20 is moved to the left and the roll shaft 10 is moved to the right in the figure, and the rolling wheel is moved. The interval between 11 and 21 is set to W2. At this time, the distance between the chocks 30 and 40 is also reduced by W1-W2, but the rest bar 60 bridged between the two is reduced by that amount due to the above-described structure, and thus no problem occurs.

The cylinders 113 and 123 are stopped, the oil injection is stopped (the fluid pressure is reduced), and the roll shaft 10 and the sleeve 20 are fixed again by returning to the interference fit state.

Although one embodiment has been described above, other embodiments of the present invention are naturally conceivable. For example, a) The number of projections and recesses that engage a pair of split-type rest bars and the recesses are not limited to those in the above embodiment (and drawings). Also in the above embodiment, various details can be modified, for example, by fitting a lubricating bush between the guide rod 63 and the insertion hole 64.

B) The fitting position adjusting means (reference numeral 120/130 in FIG. 1B) between the roll shaft and the sleeve may be provided only on one of the chocks (30/40). . Also, when two sleeves are fitted on the roll shaft and the rolling wheel portions are provided on the respective sleeves, it is possible to obtain the same effect as the embodiment.

[0040]

[Effect of device]

 As described above, the rolling mill of the present invention is equipped with the rest bar between the chocks while the roll width can be adjusted by moving the chocks. This rest bar can respond smoothly to changes in the roll width due to movement of the chock, and can be equipped with stripper guides to increase the rigidity of the rolling mill if necessary. Moreover, in a normal rolling mill, there is no mechanical imbalance such as exerting excessive bending moment on the chock. Therefore, the rolling mill of the present invention can roll the shaped steel of various sizes by adjusting the roll width and can smoothly feed the shaped steel to the rolling roll. Is preferred.

According to the rolling mill of the second aspect, the position of the stripper guide with respect to the rest bar can be adjusted. Therefore, even when the end portion of the rolling wheel portion is ground, the position of the stripper guide can be easily adjusted in accordance with it.

Further, in the rolling mill of claim 3, in addition to the above, the roll width can be adjusted easily and quickly at any time (even while the rolling roll is rotating), so that the rolling of the multi-section steel is efficient. Can be converted. In addition, the structure of the rolling roll itself, which is a replacement part, is simplified, and the weight and size are reduced.

[Brief description of drawings]

FIG. 1 is a view of a rolling mill for shaped steel as a first embodiment of the present invention, and FIG. 1 (a) is a horizontal sectional view of the rolling mill taken along the product pass line (II in FIG. 2). FIG. 3B is a horizontal sectional view showing the same rolling mill in a section along the rolling roll 1.

FIG. 2 is a front view of two horizontal rolling rolls of the rolling mill of FIG.

FIG. 3 is a cross-sectional view of a rolling roll or the like as viewed from the side (a view taken along the line III-III in FIG. 2).

FIG. 4 is a horizontal cross-sectional view of a conventional rolling mill for shaped steel similar to FIG. 1 (a).

[Explanation of symbols]

 1 Rolling Roll 10 Roll Shaft 20 Sleeve 30/40 Chock 50 Pressure Fluid Supply Means 53/54 Pressure Fluid Supply Channel 60 (61/62) Rest Bar 63 Guide Rod (Convex) 64 Insertion Hole (Concave) 70 (71/72) Stripper guide 101 Housing 110/120 Fitting position adjusting means

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Zun Furukawa, 1-2 Marunouchi, Chiyoda-ku, Tokyo Nihon Kokan Co., Ltd. (72) Inventor, Kiyotaka Morioka 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Date Inside the Steel Pipe Co., Ltd. (72) Creator Makinohara Misao 1-2, Marunouchi, Chiyoda-ku, Tokyo Date Inside the Steel Pipe Co., Ltd. (72) Toru Morinori 1-2-2 Marunouchi, Chiyoda-ku, Tokyo Date Inside the Steel Pipe Co., Ltd. (72) Inventor Hironori Asari 3-1-1 Higashikawasaki-cho, Chuo-ku, Kobe-shi, Hyogo Inside Kawasaki Heavy Industries, Ltd. (72) Creator Masatoshi Fukuda 3 Higashi-kawasaki-cho, Chuo-ku, Kobe-shi, Hyogo 1st-1 Kawasaki Heavy Industries, Ltd. Kobe factory (72) Creator Ryoichi Yamase 3-1-1 1-1 Higashikawasakicho, Chuo-ku, Kobe-shi, Hyogo Kawasaki Heavy Industries Ltd. The company Kobe factory

Claims (3)

[Scope of utility model registration request] 1. A rolling mill having a rolling roll for rolling a shaped steel, the rolling roll being supported by two chocks, and a rest bar being mounted between the chocks, the rolling mill having a part of the rolling ring. A rolling roll is fitted on the roll shaft so that the relative position of the sleeve can be adjusted in the axial direction, and such a rolling roll is supported by the above-mentioned chock so that it can be rotated only between the one sleeve and the other portion, A rolling mill, characterized in that a pair of rest bars, which are engaged with each other by relative protrusions and depressions so as to be relatively movable only in a direction parallel to the axis of the rolling roll, are attached to each chock. 2. The rolling mill according to claim 1, wherein a stripper guide is attached to each of the rest bars so that a position of the rest bar can be adjusted in a direction parallel to the axis of the rolling roll by attaching a shim. 3. The sleeve is fitted onto the roll shaft by an interference fit, and a pressure fluid supply passage to the fitting portion of the interference fit is formed inside the roll shaft, and a pressure is applied to the supply passage. The rolling mill according to claim 1 or 2, wherein a fluid supply means is connected and an axial position adjusting means is provided for at least one chock.