JP5861670B2 - Rolling mill roll shift roll apparatus, rolling mill roll shift roll forming method, and rolling mill - Google Patents

Description

  The present invention relates to a technique for improving a non-shifting roll of an existing rolling mill to shift.

  As a technique for controlling a sheet crown, which is a difference in sheet thickness generated during rolling of a steel sheet, a roll shift (see Patent Document 1 and Patent Document 2), a work roll bender (see Patent Document 3), and a roll crown (see Patent Document 4) There is a technology. Among them, roll shift is a technique for controlling the sheet crown during rolling by shifting the roll of the rolling mill in the axial direction. A rolling mill to which a roll shift is applied (so-called shift mill) is highly evaluated for its ability to control a sheet crown more than other technologies. Since the control of the sheet crown is particularly important in the process close to the final stage when the rolled material becomes a product, the shift mill has conventionally been installed mainly in the surface finishing line of the cold rolling downstream in the rolling equipment. . On the other hand, many shift mills were not installed in other lines including hot rolling on the upstream side.

  However, in recent years, the demand for high-quality steel sheets with reduced sheet thickness has increased, and the surface finish of the rolled material may not be able to be processed by just using the shift mill installed in the downstream process. Yes. For this reason, there has been a growing demand for effective utilization of other existing rolling mills installed in the rolling equipment, including upstream processes. Therefore, there is a demand for a technique for improving the sheet crown control ability by improving the rolls (hereinafter referred to as “fixed rolls”) of these rolling mills so as to shift (hereinafter referred to as “shift rolls”).

  Looking at the technology that can be applied to shift the fixed roll into a shift roll, there is a roll shift device described in Patent Document 5. This device moves a bearing box in the axial direction by attaching a shift frame to a bearing box that is a roll bearing of a rolling mill and driving a shift cylinder connected to the shift frame to apply axial thrust to the shift frame. And the roll is shifted.

Japanese Patent Laid-Open No. 06-344015 Japanese Patent Laid-Open No. 07-096307 JP-A-10-258304 JP 2007-301585 A JP 2011-025299 A

  However, the rolling mill is usually provided with a reduction cylinder for supplying a reduction load to the roll and a pressure block for applying a reaction force of the reduction load to the housing side. This rolling load is generally set to the order of one hundred tons. And in the rolling mill of patent document 5, the above-mentioned roll shift apparatus is not applied to the bearing box of the backup roll which contact | abuts such a reduction cylinder or a pressure block. In other words, a roll to which a relatively large load such as a rolling load is transmitted has its bearing firmly fixed to the housing side by the load. Therefore, by simply applying an axial thrust to the roll, It cannot be shifted easily.

As described above, depending on the fixed rolls of the existing rolling mill, there is a structure (hereinafter referred to as “load transmitting body”) that is in contact with the bearing and transmits the load to and from the bearing. There is a case. The above-mentioned reduction cylinder and pressure block are mentioned as such a load transmission body. Further, a device that supports the weight of the bearing (for example, a work roll balance that supports the upper roll from below via the bearing) can be cited as a load transmission body. Furthermore, the housing itself is also cited as a load transmission body when it contacts the bearing and supports the weight of the bearing.
The present invention has been made in view of the above, and even if a relatively large load is transmitted between the fixed roll of the existing rolling mill and the load transmission body around the fixed roll, The present invention provides a technique that can be shift-rolled.

In order to solve the above-mentioned problem, a certain aspect of the shift roll forming apparatus for a rolling mill roll according to the present invention is used to transmit a load between a bearing-side displacement member attached to a bearing of the rolling mill roll and the bearing. A load transmission body-side displacement member attached to the load transmission body, and the bearing-side displacement member and the load transmission body-side displacement member are formed in the axial direction of the roll while forming surfaces facing each other. It was configured to be displaced in opposite directions.
Moreover, it was comprised so that the roll of the said rolling mill might be 2 steps | paragraphs. Since the two-high rolling mill has only two work rolls to which the rolling load is transmitted, it is conventionally difficult to make a shift mill, and other number of rolling mills (four-high rolling mill, six-high rolling mill, etc.) Shift milling was significantly delayed. Therefore, according to this structure, since almost all rolling mills installed in the rolling equipment can be shift milled, the control capability of the plate crown in the entire rolling equipment can be greatly improved.

  According to this structure, the bearing of a rolling mill roll will be couple | bonded with a load transmission body via the shift roll-izing apparatus which concerns on this invention. Since the displacement member on the bearing side and the displacement member on the load transmission body according to the present invention are configured to displace in opposite directions, the bearings or load transmission bodies respectively attached to the two members are arranged in the axial direction. Displace in opposite directions. At the same time, the load applied from the outside to one member between the displacement member on the bearing side and the displacement member on the load transmission body is transmitted to the other member using the surfaces facing each other. Even if it is relatively large, both axial displacement and load transmission between the displacement member on the bearing side and the displacement member on the load transmission body can be achieved.

Therefore, the bearing and the load transmission body can be displaced in the opposite directions in the axial direction while maintaining a state in which a relatively large load is transmitted between the bearing and the load transmission body. The rolled roll can be shifted in the axial direction.
Moreover, it is good also as a structure which provides a cylindrical roller between the displacement member by the side of the said bearing, and the displacement member by the side of the said load transmission body. According to this structure, the fixed roll to which a bigger load is transmitted can be made into a shift roll by using a cylindrical roller.

  Moreover, a certain aspect of the rolling mill which concerns on this invention is a drive device which supplies the axial thrust to the roll which provided the shift roll apparatus of the said rolling mill roll of the said certain aspect, and the shift roll apparatus of the said rolling mill roll. It comprised so that. According to this structure, even if it is a fixed roll of the existing rolling mill, a roll shift can be used and the plate crown control capability of a rolling mill can be improved.

The load transmission body may be a rolling cylinder, a pressure block, and a work roll balance of a rolling mill. With this configuration, it is possible to obtain a rolling mill in which a fixed roll to which a relatively large load is transmitted by a rolling cylinder, a pressure block, and a work roll balance is converted into a shift roll.

  Moreover, the aspect of the shift roll forming method of the rolling mill roll according to the present invention is attached to the bearing of the rolling mill roll by using the shift roll converting apparatus of the rolling mill roll according to the aspect described above. Supplying thrust in the axial direction to the first mounting step, the second mounting step of mounting the displacement member on the load transmission body on the load transmission body that transmits the load between the bearings, and the roll of the rolling mill And a third mounting step for mounting the driving device. According to this structure, even if it is a fixed roll of the existing rolling mill, a roll shift can be used and the plate crown control capability of a rolling mill can be improved.

  Therefore, according to the shift roll forming apparatus for rolling mill rolls according to an aspect of the present invention (hereinafter, also simply referred to as “shift roll forming apparatus”), the fixed roll of the existing rolling mill is connected to the bearing of the fixed roll and the fixed roll. Even if a relatively large load is transmitted between the surrounding load transmitting bodies, the shift roll can be realized. Further, the shift roll forming device may be configured to displace the two members, the displacement member on the bearing side and the displacement member on the load transmission body, in opposite directions to each other while forming surfaces facing each other. In addition, the number of members other than the two of the displacement member on the bearing side and the displacement member on the load transmission body can be configured even if it is relatively small. Therefore, the fixed roll can be changed to a shift roll with a simple configuration with reduced cost.

It is a schematic perspective view explaining the shift roll-ized apparatus which concerns on embodiment of this invention. It is the II-II sectional view taken on the line in FIG. It is a figure explaining the state which the displacement member by the side of a bearing and the displacement member by the side of a load transmission body displaced. It is the IV-IV sectional view taken on the line in FIG. It is a schematic perspective view explaining the shift roll-izing apparatus which concerns on other embodiment of this invention. It is a schematic front view explaining the two-high rolling mill using the shift roll forming apparatus which concerns on embodiment of this invention. It is the VII-VII sectional view taken on the line in FIG.

  The shift roll forming apparatus according to the embodiment of the present invention is interposed between a fixed roll bearing and a load transmission body of a rolling mill provided in a rolling facility, and couples both of them in the axial direction. By making it displaceable, it is used to shift the fixed roll into a shift roll. The configuration will be described below with reference to the drawings. In addition, the shape, the magnitude | size, or ratio of each member and apparatus which comprise the shift roll apparatus of a rolling mill roll shown in the figure, and a rolling mill is suitably simplified and exaggerated.

(Constitution)
As shown in FIG. 1, the shift roll forming apparatus according to the embodiment of the present invention is a load in which a load is transmitted between the bearing-side displacement member 2 attached to the roller bearing of the rolling mill and the bearing. And a displacement member 3 on the load transmission body side attached to the transmission body. The displacement member 2 on the bearing side and the displacement member 3 on the load transmission body side are substantially the same in length in the axial direction, length in the width direction (direction perpendicular to the axial direction in the drawing), and thickness. . The displacement member 2 on the bearing side and the displacement member 3 on the load transmitting body side are spaced apart in parallel in the vertical direction, and nine rolling elements 4 are juxtaposed in the axial direction therebetween. Further, the shift roll forming apparatus 1 has two guide plates 5 and 5 at both ends in the width direction of the displacement member 2 on the bearing side and the displacement member 3 on the load transmitting body side. 5, the cylindrical roller 4 a of the rolling element 4 is pivotally supported by the roller shaft 4 b so as to freely roll in the axial direction.

  As shown in FIG. 2, the nine rolling elements 4 abut on the lower surface 3b of the displacement member 3 on the load transmission body side at the upper part thereof, and in this state, the nine rolling elements 4 integrally form the displacement member 3 on the load transmission body side. I support it. The nine rolling elements 4 are in contact with the upper surface 2b of the displacement member 2 on the bearing side at the lower part thereof, and the load from the displacement member 3 on the load transmitting body side is displaced as indicated by the downward arrow in the figure. Dispersed and transmitted to the member 2.

Thus, when the displacement member 2 on the bearing side is displaced in one of the axial directions, the rolling element 4 is rotated accordingly, and the displacement member 3 on the load transmitting body side is displaced in the other in the axial direction along with the rotation. Further, when the displacement member 3 on the load transmission body side is displaced in one axial direction, the rolling element 4 is rotated accordingly, and the displacement member 3 on the load transmission body side is displaced in the other axial direction along with the rotation. Thus, the displacement member 2 on the bearing side and the displacement member 3 on the load transmission body side are displaced in the opposite directions by the rotation of the rolling element 4.
In addition, since the shift roll forming apparatus 1 is symmetrically configured in the upper, lower, front, rear, and right and left at its center (see FIG. 1), the top and bottom are reversed and interposed between the bearing and the load transmitting body. Even so, the direction of the load is only reversed. There is no change in the operation of the displacement member 2 on the bearing side and the displacement member 3 on the load transmission body and the operational effect of the shift roll forming device 1.

  In FIG. 3, the displacement member 2 on the bearing side is displaced in one axial direction (upper left direction in the figure), and the displacement member 3 on the load transmission body is displaced in the opposite direction (lower right direction in the figure). Indicates the state. At this time, among the nine rolling elements 4, the five rolling elements 4 in the central portion excluding the two rolling elements 4 on both end sides in the axial direction are composed of the displacement member 2 on the bearing side and the displacement member 3 on the load transmission body side. These two members are in contact with each other at the same time. Then, as shown in FIG. 4, a part of the surface 2b ′ of the upper surface 2b of the displacement member 2 on the bearing side and a part of the surface 3b ′ of the lower surface 3b of the displacement member 3 on the load transmission body face each other. ing.

  Here, for example, when the load is transmitted from the displacement member 3 on the load transmission body to the displacement member 2 on the bearing side, the load is firstly the bottom surface of the displacement member 3 on the load transmission body side as indicated by the arrow below vertically in FIG. The light is distributed and transmitted to the five rolling elements 4 from the facing surface 3b 'in 3b. This load is transmitted from each of the five rolling elements 4 to the opposing surface 2b ′ of the upper surface 2b of the displacement member 2 on the bearing side. In this way, the displacement member 2 on the bearing side and the displacement member 3 on the load transmission body side are displaced in the opposite directions in the axial direction, so that these two regions overlap each other in the vertical direction (region sandwiched between broken lines in the figure). ), The load is transmitted.

  As described above, the shift roll forming apparatus 1 includes the surface 2b ′ facing each other between the two, whether or not the displacement member 2 on the bearing side and the displacement member 3 on the load transmission body are displaced in the axial direction. 3b 'is formed. Assuming that the load is supported by a point or a line, when the displacement member 2 on the bearing side and the displacement member 3 on the load transmission body are displaced in the opposite directions in the axial direction, the load per unit region supporting the load The load becomes very large. Therefore, it becomes difficult to hold the displacement member 2 on the bearing side or the displacement member 3 on the load transmitting body side horizontally, and these cannot be displaced in the axial direction. However, since the shift roll forming apparatus 1 according to the present embodiment supports and transmits the load by the surface formed as described above, even if the load is relatively large, the displacement member 2 on the bearing side and the load transmission side The displacement of the displacement member 3 in the axial direction can be compatible with the transmission of the load.

Therefore, the shift roll forming apparatus 1 maintains the state in which a relatively large load is transmitted between the bearing and the load transmitting body coupled to the shift roll forming apparatus 1 in the opposite directions in the axial direction. Displace. And the roll of the rolling mill supported by the bearing can be shifted in the axial direction.
Further, the shift roll forming apparatus 1 includes the bearing-side displacement member 2 and the load transmission body-side displacement member 3, the rolling element 4, and the guide plate 5. Since the number of members other than two of the displacement members 3 on the transmission body is relatively small, the cost can be reduced and the configuration can be simplified.

  The shift roll forming apparatus 1 according to the present invention only needs to have a configuration that can achieve both axial displacement and load transmission of the displacement member 2 on the bearing side and the displacement member 3 on the load transmission body side, as shown in FIG. It is not limited to the embodiment. For example, as shown in FIG. 5, the displacement member 2 on the bearing side has a substantially U-shaped cross section and the displacement member 3 on the load transmission body side has a substantially T-shaped cross section, and the upper surface 2 b of the displacement member 2 on the bearing side and the load transmission side The rolling element 4 may be interposed between the lower surface 3 b of the displacement member 3. Thereby, since the guide plate 5 becomes unnecessary, the shift roll forming apparatus 1 can be configured more simply.

  Further, the number of rolling elements 4 may be changed as appropriate, and a ball may be used between the bearing side displacement member 2 and the load transmission body side displacement member 3 instead of the cylindrical roller 4a. The number may be changed as appropriate. Further, the plate-like load transmitting body side displacement member 3 is not particularly provided, and a plurality of rolling elements 4 may be brought into direct contact with the load transmitting body, or the bearing side displacement member 2 may be used without using the rolling elements 4. And the load transmitting body side displacement member 3 may be electromagnetically separated from each other. That is, it is only necessary that the axial displacement of the displacement member 2 on the bearing side and the displacement member 3 on the load transmission body side can be compatible with the load transmission.

(Rolling mill)
Next, the two-high rolling mill according to this embodiment will be described with reference to FIGS. In the figure, the shift roll forming apparatus 1 is shown in a simplified manner, and in FIG. 6, a part of the housing (a front column portion 12c and a rear column portion 12d to be described later) is omitted for explanation. .
The two-high rolling mill 20 includes a housing 12, an upper work roll 6a and a lower work roll 6b disposed in the housing 12, and a work roll chock 7a as a bearing that supports the two work rolls 6a and 6b. 7b. Further, the two-high rolling mill 20 includes a reduction cylinder 8 that is disposed on the bottom plate portion 12a of the housing 12 and that supplies a reduction load in contact with the lower work roll chock 7b.

  Further, the two-high rolling mill 20 has a pressure block 9 which is disposed on the ceiling portion 12b of the housing 12 and abuts on the upper work roll chock 7a to apply a reaction force of the rolling load. The two-high rolling mill 20 is disposed on the front pillar portion 12c and the rear pillar portion 12d (see FIG. 7) of the housing 12, and supports the upper work roll 6a with a cylinder mechanism via the work roll chock 7a. A roll balance 10 is provided.

  The two-high rolling mill 20 includes the shift roll forming device 1 between the work roll chock 7a, 7b and each of the reduction cylinder 8, the pressure block 9, and the work roll balance 10 which are load transmission bodies. Furthermore, the two-high rolling mill 20 has a drive unit 11 that supplies axial thrust to the work rolls 6a and 6b at one neck of the two work rolls 6a and 6b.

  In the reduction cylinder 8, the cylinder tube 8b is attached to the bottom plate portion 12a of the housing 12, and the upper surface of the cylinder rod 8c is the surface on the reduction cylinder 8 side of the displacement member 3 on the load transmitting body side of the shift roll forming device 1 (FIGS. 2 and 4 is fixed to the upper surface 3a). The bearing side surface (the lower surface 2a in FIGS. 2 and 4) of the displacement member 2 on the bearing side of the shift roll forming apparatus 1 is fixed to the lower work roll chock 7b. This shift roll forming apparatus 1 has the configuration shown in FIG.

The pressure block 9 is attached to the ceiling portion 12b of the housing 12 via a reduction screw (not shown) connected to the upper surface thereof, and the lower surface thereof is the pressure block 9 of the displacement member 3 on the load transmitting body side of the shift roll forming device 1. It is fixed to the side surface (upper surface 3a). The bearing side surface (lower surface 2a) of the displacement member 2 on the bearing side of the shift roll forming device 1 is fixed to the upper work roll chock 7a.

In the work roll balance 10, a cylinder tube 10b is disposed on each of the front column portion 12c and the rear column portion 12d of the housing, and the upper surface of the cylinder rod 10a is the work roll balance of the displacement member 3 on the load transmitting body side of the shift roll forming apparatus 1. It is fixed to the 10 side surface (upper surface 3a). The bearing side surface (lower surface 2a) of the displacement member 2 on the bearing side of the shift roll forming device 1 is fixed to the upper work roll chock 7a. This shift roll forming apparatus 1 has the configuration shown in FIG.
The drive device 11 described above may be configured to be attached to the work roll chocks 7a and 7b and apply thrust.

(Roller roll shift-shift method)
Next, the shift roll forming method of the rolling mill roll, in which the shift roll forming apparatus 1 is attached to the fixed roll of the two-high rolling mill 20 and the fixed roll is converted into a shift roll, will be described with reference to FIGS. 6 and 7. .
First, the work roll chock 7a, 7b is attached to the main body of a rearrangement rail (not shown) that is axially extended and fixed to the housing 12 of the two-high rolling mill 20 for the rearrangement work of the work rolls 6a, 6b. Is mounted via a replacement wheel (not shown). Thereafter, the work roll chock 7a, 7b is extracted from the housing 12 by using the replacement rail.

Next, on the outer walls of the extracted work roll chocks 7a and 7b, gaps are formed so that the shift roll forming apparatus 1 can be interposed between the portions that contact the three load transmission bodies and the respective load transmission bodies. Then, a predetermined amount is cut.
Next, the work roll chock 7a, 7b in which the gap is formed is inserted into the housing 12 again using the replacement rail, and the work roll chock 7a, 7b is arranged so that the work roll 6a, 6b is in a predetermined position. To do.

  Next, the shift roll forming device 1 is inserted into the formed gap, and the bearing-side surface (lower surface 2a) of the bearing-side displacement member 2 is attached to the work roll chocks 7a and 7b (first attachment step). Moreover, the load transmission body side surface (lower surface 3a) of the displacement member 3 on the load transmission body side of the shift roll forming apparatus 1 is attached to the reduction cylinder 8 (second attachment step). In this way, the shift roll forming apparatus 1 is interposed between the work roll chocks 7 a and 7 b and the reduction cylinder 8. Further, the shift roll forming apparatus 1 is attached to the pressure block 9 and the work roll balance 10 in the same manner as the second attachment process.

In addition, as long as the timing which performs a 1st attachment process and a 2nd attachment process is after the said space | gap was formed, you may change suitably before and after inserting the work roll chock 7a, 7b in the housing 12. FIG. In addition, either the first attachment step or the second attachment step may be performed first or at the same time.
Next, the drive unit 11 that supplies axial thrust to the work rolls 6a and 6b is attached to one neck of the work rolls 6a and 6b of the two-high rolling mill 20 (third attachment process). As described above, the method of converting the work rolls 6a and 6b of the two-high rolling mill 20 into shift rolls is configured.

In addition, as long as the space | gap which can interpose the shift roll apparatus 1 is formed, this space | gap does not need to be formed by cutting only the work roll chock 7a, 7b side, and may cut only the load transmission body side. Alternatively, it may be formed by cutting both. However, if the load transmitting body such as the reduction cylinder 8 is cut, there are relatively many factors that take into account the balance with the load, and the cutting work becomes complicated. Therefore, if only the work roll chock 7a, 7b side is cut as described above, the work is facilitated, and this is particularly effective when the number of load transmission bodies provided in the rolling mill 20 is large.
The two-high rolling mill 20 may be appropriately provided with a control device that controls the shift amount of the work rolls 6a and 6b, a holding device that holds the shift position, and the like.

(Roll shift operation)
Next, the roll shift operation of the two-high rolling mill 20 according to this embodiment configured as described above will be described.
First, when the driving device 11 is driven and axial thrust is supplied to the work rolls 6a and 6b, the work roll chocks 7a and 7b supporting the work rolls 6a and 6b are also moved in the axial direction. A force to be displaced acts. In response to this force, in the shift roll forming apparatus 1, the displacement member 2 on the bearing side attached to the work roll chock 7a, 7b and the displacement member 3 on the load transmission side attached to each load transmission body are: It is displaced in the axial direction as described above.

  At this time, in the shift roll forming apparatus 1 between the work roll chock 7b and the reduction cylinder 8, as shown in FIG. 4, the surfaces facing each other between the displacement member 2 on the bearing side and the displacement member 3 on the load transmission side. 2b 'and 3b' are formed. The reduction load supplied from the reduction cylinder 8 is first distributed and transmitted to the five rolling elements 4 from the opposing surface 3b 'of the displacement member 3 on the load transmission body side. Further, the rolling load is transmitted from the five rolling elements 4 to the opposing surface 2b 'of the displacement member 2 on the bearing side. The reduction load is transmitted from the displacement member 2 on the bearing side to the work roll chock 7b. As described above, the shift roll forming device 1 makes it possible to achieve both the displacement in the axial direction of the work roll chock 7b and the reduction cylinder 8 and the transmission of the reduction load.

  Further, in the shift roll forming device 1 between the work roll chock 7a and the pressure block 9, as in the case of the above-described reduction cylinder 8, between the displacement member 2 on the bearing side and the displacement member 3 on the load transmitting body side, Faces 2b 'and 3b' facing each other are formed. Then, the reaction force of the rolling load applied from the pressure block 9 is transmitted to the work roll chock 7a through these mutually facing surfaces 2b 'and 3b' and the rolling elements 4, similarly to the case of the rolling cylinder 8. The As described above, the shift roll forming apparatus 1 makes it possible to achieve both displacement in the axial direction of the work roll chock 7a and the pressure block 9 and transmission of the reaction force of the rolling load.

  Also in the shift roll forming device 1 between the work roll chock 7a and the work roll balance 10, as in the case of the reduction cylinder 8, the displacement member 2 on the bearing side and the displacement member 3 on the load transmission body side are interposed. The surfaces 2b 'and 3b' facing each other are formed. And the weight which consists of a work roll a, the work roll chock 7a, etc. is transmitted to the work roll balance 10 through these mutually opposing surfaces 2b 'and 3b' and the rolling elements 4 as in the case of the above-mentioned reduction cylinder 8. The As described above, the shift roll forming device 1 can achieve both the displacement in the axial direction of the work roll chock 7a and the work roll balance 10 and the transmission of the weight.

  As described above, between the work roll chocks 7a and 7b and all of the load transmission bodies connected thereto, the work roll chocks 7a and 7b and the load transmission bodies can both achieve displacement in the opposite directions and transmission of the load. . Thereby, even if the work rolls 6a and 6b of the existing two-high rolling mill 20 are fixed rolls, as shown by the bidirectional arrows in FIG. The plate crown control capability of the rolling mill 20 can be improved. In particular, since the two-high rolling mill 20 has conventionally been difficult to shift mill than other rolling mills, according to this configuration, almost all rolling mills installed in the rolling equipment can be shift milled. The ability to control the crown of the entire facility can be greatly improved.

  In addition, in order to demonstrate the control capability of the plate crown of the two-high rolling mill 20 to which the shift roll forming apparatus 1 according to the present embodiment is applied, an experiment for measuring the control capability of the mechanical crown was performed. As a result, the mechanical crown control capability of the two-high mill 20 is equivalent to that of the existing shift roll four-high mill, and the control capability of the sheet crown can be greatly improved before the shift mill.

(effect)
The two-high rolling mill 20 according to the present embodiment can be obtained only by a shift roll forming apparatus 1 having a simple structure, a work for forming a gap for attaching the shift roll forming apparatus 1, and a work for attaching the shift roll forming apparatus 1 to the gap. . As described above, since the fixed roll can be converted into a shift roll, the capital investment cost can be greatly suppressed as compared with the case where a shift mill is newly introduced.

Moreover, according to the two-high rolling mill 20 according to the present embodiment, the roll shift can be easily used even during the rolling operation without stopping the rolling line as described below, and the existing processing flow is maintained. Can be rolled. For example, if the shift roll is to be realized by using the capacity of the existing two-high rolling mill, the work roll such as the work roll balance 10 is increased after the work roll is shifted using the rail for replacement. A method of arranging and rolling the two work rolls 6a and 6b at the initial rolling position using an apparatus for adjusting the position is conceivable. However, in this method, it is necessary to stop the rolling line and shift the work rolls 6a and 6b or adjust the height position each time the rolling material is passed, so that the existing processing flow is greatly changed. There must be. In this regard, according to the two-high rolling mill 20 according to the present embodiment, it is not necessary to stop the rolling line each time the rolled material passes, and therefore the rolled material can be fed into the two-high rolling mill 20 with the existing processing flow. . Therefore, the operation efficiency of the rolling line does not decrease.
In addition, the rolling mill to which the shift roll forming apparatus 1 according to the present invention is applied is not limited to a two-stage rolling mill, and any number of rolling mills can be used as long as it has a fixed roll.

1 Rolling mill shift roll device (shift roll device)
DESCRIPTION OF SYMBOLS 2 Bearing side displacement member 3 Load transmission body side displacement member 4 Rolling body 4a Cylindrical roller 4b Roller shaft 5 Guide plates 6a, 6b Work rolls 7a, 7b Work roll chock 8 Reduction cylinder 9 Pressure block 10 Work roll balance 11 Drive device 12 Housing
20 rolling mill

Claims (6)

A bearing-side displacement member attached to the roll bearing of the two-high rolling mill;
A load transmission body-side displacement member attached to a load transmission body in which load transmission is performed with the bearing;
A shift roll forming apparatus for a rolling mill roll configured to displace the bearing side displacement member and the load transmission body side displacement member in opposite directions to each other in an axial direction of the roll while forming mutually opposing surfaces.   2. The shift roll forming apparatus of a rolling mill roll according to claim 1, wherein a cylindrical roller is provided between the displacement member on the bearing side and the displacement member on the load transmitting body side. A shift roll forming device for a rolling mill roll according to claim 1 or 2,
The rolling mill provided with the drive device which supplies the thrust of an axial direction to the roll which provided the shift roll conversion apparatus of the said rolling mill roll.   The rolling machine according to claim 3, wherein the load transmission body is a rolling cylinder, a pressure block, and a work roll balance of the rolling mill.   Using the shift roll forming device of the rolling mill roll according to claim 1 or 2,
  A first attachment step of attaching the bearing-side displacement member to a roll bearing of a rolling mill;
  A second attachment step of attaching the displacement member on the load transmission body to a load transmission body in which a load is transmitted to and from the bearing;
  A third attachment step of attaching a driving device for supplying axial thrust to the roll of the rolling mill;
  A method for converting a rolling mill roll into a shift roll.   A bearing-side displacement member attached to the roll bearing of the two-high rolling mill;
  A load transmitting body for transmitting a load between the bearing and a rolling element provided between the bearing-side displacement member;
  A rolling roll forming apparatus for shifting a rolling mill roll, wherein the rolling element rotates to displace the bearing and the load transmitting body in opposite directions in the axial direction of the roll.

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