JP2014217873A - Multistage rolling machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a multistage rolling machine to switch the method for driving a work roll and roll various materials having different deformation resistance.SOLUTION: A multistage rolling machine 1 of the invention includes: a work roll 2 which rolls a rolled material S; an intermediate roll 3 which supports the work roll 2; and a back up roll 4 which supports the intermediate roll 3. In the multistage rolling machine 1, the driving method may be switched between a WR driving method where a rotational driving force is input to the work roll 2 and an IMR driving method where the rotational driving force is input to the intermediate roll 3.

Description

  The present invention relates to a multi-high rolling mill capable of switching a driving method for a rolling mill between a plurality of methods.

  As is well known, a multi-stage rolling mill is used when rolling a rolled material such as a thin plate material or a foil material. As a multi-stage rolling mill, it has a work roll for rolling a rolled material, an intermediate roll for supporting the work roll, and a backup roll for supporting the intermediate roll, and these rolls are cluster-type spreading like a bunch of straw. A multi-high rolling mill is used. For example, as such a multi-high rolling mill, those shown in Patent Document 1 and Patent Document 2 are known.

JP-A 62-45413 JP 2004-136328 A

Using this Patent Document 1 and Patent Document 2, when rolling a rolling material having a large deformation resistance, for example, a copper alloy foil or plate, and a rolling material having a small deformation resistance, for example, a pure copper foil or plate, using a multi-stage rolling mill. When rolling, think about each.
First, when rolling a rolled material having a large deformation resistance such as a copper alloy, a larger rolling load is generated at the time of rolling than when a work roll having the same diameter is used as compared with pure copper. Therefore, a rolling load is reduced using a small-diameter work roll having a small contact area with the rolled material. When rolling with a work roll with a small diameter, there is almost no margin for the distance between the work roll axis centers, so it is also possible to input a rotational drive force to the work roll shaft end via a universal spindle, etc. It is structurally difficult to install the support portion. Therefore, in a multi-stage rolling mill using a work roll with a small diameter, first, the rotational driving force is transmitted to the intermediate roll having a longer distance between the shaft centers than the work roll, and then the rotational driving force is transmitted from the intermediate roll to the work roll. In general, an intermediate roll driving method (IMR driving method) for driving a work roll is employed.

On the other hand, when rolling a rolling material with a small deformation resistance like pure copper, a rolling load becomes low.
In this case, a large-diameter work roll having a large contact area with the rolled material is often used. This is because when the roll is rolled using a small-diameter work roll, the contact area of the work roll with respect to the rolled material is small, and the small-diameter roll is also thermally unstable compared to the large-diameter roll, so that the rolled material is wrinkled (defective shape). This is because it is likely to occur. For this reason, when rolling a rolling material with a small deformation resistance, a large-diameter work roll is preferably used.

In many cases, the axes of work rolls with a large diameter are sufficiently separated from each other in distance. The work roll is input by inputting a rotational driving force to the shaft end of the work roll supported by a chock or the like via a universal spindle. A work roll driving method (WR driving method) for driving the motor can be employed.
By the way, the multi-high rolling mills of Patent Document 1 and Patent Document 2 described above employ the above-described IMR driving method. Of course, in the multi-high rolling mills of Patent Document 1 and Patent Document 2, it is possible to mount work rolls having different roll diameters from a large diameter to a small diameter, but IMR drive is performed for all work roll diameters. Therefore, for example, when rolling a material with small deformation resistance such as pure copper, when the power of the intermediate roll is transmitted to the work roll, if a slip between the rolls occurs between the intermediate roll and the work roll, On the other hand, defects such as surface flaws and surface unevenness may occur, and it may become impossible to maintain good product quality.

In order to respond to such a situation, pure copper and copper alloys, and soft materials such as pure copper and aluminum, and hard materials such as stainless steel, nickel alloys, and titanium (various types of rolled materials with a large difference in deformation resistance) Is preferably rolled by a single rolling mill so that the work roll driving method can be switched between the WR driving method and the IMR driving method with one rolling mill.
Therefore, in view of the above problems, the present invention is capable of switching a method of driving a work roll with a single rolling mill, and capable of rolling various materials having a large difference in deformation resistance. The purpose is to provide a machine.

In order to achieve the above-described object, the present invention takes the following technical means.
A multi-high rolling mill according to the present invention is a multi-high rolling mill having a work roll for rolling a rolled material, an intermediate roll for supporting the work roll, and a backup roll for supporting the intermediate roll. The work roll driving method for inputting the rotational driving force and the intermediate roll driving method for inputting the rotational driving force to the intermediate roll can be switched.

Preferably, in the work roll drive system, a rotational drive force is input to the work roll without inputting a rotational drive force to the intermediate roll, and in the intermediate roll drive system, It is preferable that the rotational driving force is input to the intermediate roll supported by the intermediate roll driving input unit without inputting the rotational driving force to the work roll.
Preferably, in the work roll drive system, a chock part that rotatably supports the work roll is provided, and a rotational driving force may be input to the work roll supported by the chock part. .

Preferably, the shaft end portion on the driving side of the intermediate roll used in the work roll driving method has a smaller diameter or a shorter length than the shaft end portion on the driving side of the intermediate roll used in the intermediate roll driving method. The intermediate roll drive input unit having a function of supporting the roll may be disconnected.
Preferably, a drive motor for generating the rotational drive force, a pinion stand for branching the rotational drive force generated by the drive motor, and a universal spindle for work rolls capable of inputting the output of the pinion stand to the work roll side And an intermediate roll universal spindle that can be input to the intermediate roll side. In the work roll drive system, the drive motor, the pinion stand, and the universal roll universal spindle are connected to each other. Although the driving force from the motor is not transmitted to the universal spindle for the intermediate roll by the switching mechanism in the pinion stand, in the intermediate roll driving system, the driving motor, the pinion stand, and the work roll Universal spindle connected Although state is maintained, it may drive force from the motor by the switching mechanism in the pinion stand is adapted not transmitted to the universal spindles for work rolls.

  By using the multi-high rolling mill of the present invention, it is possible to switch a method of driving a work roll with a single rolling mill and to roll various materials having a large difference in deformation resistance.

It is the front view which showed roll arrangement | positioning of the multistage rolling mill which employ | adopts a WR drive system. It is the front view which showed roll arrangement | positioning of the multistage rolling mill which employ | adopts an IMR drive system. It is the top view which showed the drive side (motor side) shaft end side of the multi-high rolling mill which employ | adopts a WR drive system. It is the top view which showed the drive side (motor side) shaft end side of the multi-high rolling mill which employ | adopts an IMR drive system. It is the side view which showed the drive side (motor side) shaft end side of the intermediate roll of the multi-high rolling mill which employs the WR drive system. It is the side view which showed the drive side (motor side) shaft end side of the intermediate roll of the multi-high rolling mill which employ | adopts an IMR drive system.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In the following description, the same parts are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.
First, the multi-high rolling mill 1 having the basic configuration of the present invention includes a work roll 2 that rolls the rolled material S, an intermediate roll 3 that supports the work roll 2, and a backup roll 4 that supports the intermediate roll 3. It is a mold rolling machine. In the multi-high rolling mill 1 having this configuration, the present invention employs two driving methods, a work roll driving method (WR driving method) and an intermediate roll driving method (IMR driving method), as methods for driving the multi-high rolling mill 1. It is characterized by being freely switchable.

  In the WR drive method, a rotational driving force is input to the work roll 2 having the chock unit 6 without inputting a rotational driving force to the intermediate roll 3 from an intermediate roll driving input unit 5 to be described later, and the work roll 2 is driven. It is something to be made. In the IMR driving method, the rotational driving force is input to the work roll 2 from the intermediate roll driving input unit 5 via the intermediate roll 3 without inputting the rotational driving force to the work roll 2. Is driven.

In the multi-high rolling mill 1 of the present invention, the shape and connection state of the work roll and the intermediate roll change depending on which of the WR driving method and the IMR driving method described above is adopted. Therefore, hereinafter, the multi-high rolling mill 1 adopting each driving method will be described separately.
First, the roll structure is demonstrated regarding the multi-high rolling mill 1 which employ | adopts a work roll drive system (WR drive system).

The multi-stage rolling mill 1 that employs the WR drive system shown in FIGS. 1, 3, and 5 is suitable for cold rolling a rolled material S having a small deformation resistance such as pure copper to process it into a plate material or a foil material. is there.
As shown in FIG. 1, a WR drive type multi-high rolling mill 1 has work rolls 2W and 2W arranged in a pair of upper and lower sides. Each of these work rolls 2W and 2W is supported by two intermediate rolls 3W and 3W, and these intermediate rolls 3W and 3W are further supported by three backup rolls 4 positioned on the outermost side.

Moreover, in this multi-high rolling mill 1, the rolling material S is horizontal between the pair of work rolls 2W and 2W arranged vertically from the entry side (left side in FIG. 1) to the exit side (right side in FIG. 1). The rolled material S is rolled in the thickness direction of the rolled material S.
Further, in this multi-high rolling mill 1, strip guides 7 are provided for the purpose of smoothly passing and guiding the rolled material S along the rolling pass line on the entry side and the exit side of the work roll 2W, respectively. Is provided. The strip guide 7 is not visible in the shadow of the chock portion 6 in FIG. 1, but is clearly shown in FIG. 2 where the chock portion 6 is not provided as will be described later, regardless of the drive system. It is attached to the multi-stage rolling mill 1 and smoothly passes and guides the rolled material S along the rolling pass line.

  As shown in FIG. 1, the work roll 2W provided in the above-described WR drive type multi-high rolling mill 1 has a good quality such that a surface wrinkle is not generated on a rolled material S having a small deformation resistance such as pure copper. For example, a roll having a large diameter of 100 mm to 180 mm is used so as to ensure rolling. The WR drive type work roll 2W in FIG. 1 has a larger roll diameter than an IMR drive type work roll (for example, a diameter of 40 mm to 100 mm), which will be described later. It becomes possible to suppress the occurrence of wrinkles (shape defects), and because the roll diameter is large, the thermal stability is improved and the quality of the rolled material S after rolling can be improved. Become.

  Further, on both end sides of the pair of upper and lower work rolls 2W and 2W, shaft portions 8 are provided coaxially with the axis of the work roll 2W and projecting further outward from the end portion of the roll. As clearly shown in FIG. 3, the shaft portion 8 is provided with a shaft support portion 9 that rotatably supports the work roll 2 </ b> W, and the work roll 2 </ b> W is attached to the chock portion 6 by using the bearing 9. It is supported so as to be rotatable about a horizontal axis. That is, the work roll 2W is a work roll with a chock portion 6 that supports the roll.

  Specifically, as shown in FIGS. 1 and 3, the chock portion 6 includes an upper chock portion 6U that rotatably supports the upper work roll 2W and a lower support that rotatably supports the lower work roll 2W. The chock portion 6D is configured by combining it up and down. These upper and lower chock portions 6U and 6D are long members arranged to face the horizontal direction along the rolling pass line, and are attached along a direction perpendicular to the axis of the work roll 2W. Yes. Further, on both sides of the upper and lower chock portions 6U and 6D, a chock guide portion for guiding the upper and lower chock portions 6U and 6D along the axial direction of the work roll 2W (from the working side to the driving side or from the driving side to the working side). 10 is provided.

  At both ends of the lower chock part 6D, there are work roll replacement wheels 11 for moving the lower chock part 6D horizontally in the axial direction (from the working side to the driving side or from the driving side to the working side) with respect to the chock guide part 10. It is attached so as to be rotatable, and when the work roll is rearranged (replaced), it is placed on the rearrangement rail 24 and the roll is rearranged. Furthermore, it is provided on the upper side of the lower chock part 6D so as to protrude upward, and by pushing up the upper chock part 6U upward, the distance between the upper and lower chock parts 6U, 6D, in other words, the upper and lower work pieces A hydraulic cylinder 12 for adjusting the roll gap of the roll 2W is provided. The hydraulic cylinder 12 may also have a work roll bending function for correcting the rolling shape during rolling.

  At the shaft end of the work roll 2W supported by the above-described upper and lower chock parts 6U and 6D on the DS side (driving side, left side in FIG. 3) shaft universal spindle head part 23 for work roll and universal spindle body for work roll A rotational driving force generated by a drive motor (not shown) or the like is inputted through a universal spindle for work rolls composed of a portion 13, and the chock unit 6 directly inputs this rotational driving force to the work roll 2W. The work roll 2W can be rotated. Specifically, the shaft end of the work roll 2W is connected to the universal spindle head portion 23 for work roll in an inserted state.

  There is also a universal joint head portion (not shown) on the opposite side of the work roll universal spindle main body portion 13 to the illustrated one, and it is connected to one of the output shafts of the pinion stand. The input shaft of the pinion stand is connected to the drive motor. Accordingly, the rotational driving force of the drive motor is input to the universal joint via the pinion stand. When the work roll 2W is driven, two universal spindles are basically installed, one for the upper work roll and one for the lower work roll. In this case, the drive is driven. The rotational driving force of the motor is transmitted to the two universal spindles.

On the other hand, as shown in FIGS. 1 and 5, on the outer side in the vertical direction of the work roll 2W, there are an intermediate roll 3W that supports the work roll 2W and an intermediate roll drive input unit 5 that rotatably supports the intermediate roll 3W. Is provided. The intermediate roll 3 </ b> W includes a shaft end portion 14 to which no rotational driving force is input from the intermediate roll drive input unit 5.
A female spline 17 into which the shaft end portion 14 of the intermediate roll 3W is fitted is formed at the end of the intermediate roll drive input portion 5 on the WS side (working side, right side in FIG. 5). A universal spindle head unit 25 for an intermediate roll is connected to an end of the unit 5 on the DS side (drive side, left side in FIG. 5), and rotational driving force generated by a drive motor (not shown) is transmitted to the intermediate roll. Input to the drive input unit 5 is possible.

  In other words, the intermediate roll universal spindle head portion 25 and the intermediate roll universal spindle main body portion 20 on the side opposite to the side where the intermediate roll drive input portion 5 is provided are also connected to the pinion from the drive motor. A rotational driving force is input through the stand. The rotational driving force of the drive motor is constantly input to the work roll universal spindle and the intermediate roll universal spindle.

However, as a pinion stand for a mechanism including a so-called idle gear in which driving force is input only to the universal spindle for the work roll when driving the work roll, and driving force is input only to the universal spindle for the intermediate roll when driving the intermediate roll Also good.
Splines (female splines 17) are formed on the inner peripheral surface of the recess 16 of the intermediate roll drive input unit 5 described above. The intermediate roll drive input unit 5 is connected to the universal spindle head unit 25 with a key or the like.

On the other hand, the intermediate roll 3W is a roll that is arranged so as to be parallel to the work roll 2W with the axis centered in the same direction as the work roll 2W. The intermediate roll 3W is disposed adjacent to the outside of the work roll 2W so that the outer peripheral face thereof is in contact with the outer peripheral face of the work roll 2W.
The shaft end 14 on the DS side of the intermediate roll 3W disposed above the work roll 2W is long enough to be inserted into the concave portion 16 of the intermediate roll drive input portion 5, but the diameter thereof is the concave portion 16. The shaft end 14 on the DS side of the intermediate roll 3 </ b> W is loosely fitted to the recess 16. There is a sufficient radial distance between the outer peripheral surface of the shaft end 14 of the intermediate roll 3W and the inner peripheral surface of the recess 16 of the intermediate roll drive input unit 5 to allow the intermediate roll 3W to freely rotate. It is open and it is set as the structure which does not transmit the rotational driving force of the intermediate roll drive input part 5 to the intermediate roll 3W. Therefore, the rotational driving force is not input from the intermediate roll drive input unit 5 to the intermediate roll 3W.

  Of the pair of upper and lower intermediate rolls 3, the shaft end 14 of the upper intermediate roll 3 </ b> W is long and is inserted into the recess 16 of the intermediate roll drive input unit 5. Therefore, also when pulling out the work roll 2W and reassembling the work roll 2W, the shaft end 14 on the DS side of the intermediate roll 3W is held by the concave portion 16 of the intermediate roll drive input unit 5, so that the intermediate roll 3W falls. There is no. A bush member 19 (holding piece) formed of a soft metal such as brass in order to prevent direct contact between the DS end shaft end 14 of the intermediate roll 3W and the recess 16 of the intermediate roll drive input unit 5. Is preferably fitted in the opening of the recess 16.

On the other hand, of the pair of upper and lower intermediate rolls 3, the shaft end 14 on the DS side of the intermediate roll 3 </ b> W disposed below the work roll 2 </ b> W is short so that it cannot be inserted into the recess 16 of the intermediate roll drive input unit 5. ing. Therefore, the rotational driving force is not input from the intermediate roll driving input unit 5.
In addition, regarding the intermediate roll 3W disposed below the work roll 2W, the intermediate roll 3W falls because the work roll 2W is supported by the lower backup roll 4 even when the work roll 2W is pulled out and rearranged. There is no worry. Therefore, the length of the shaft end portion 14 of the intermediate roll 3W may be short in the axial direction.

If the multi-stage rolling mill 1 employing the WR driving method described above is used, it is possible to reliably cold-roll a rolled material S having a small deformation resistance, such as pure copper.
Next, the roll configuration of the multi-high rolling mill 1 that employs the intermediate roll driving method (IMR driving method) will be described.
The multi-stage rolling mill 1 that employs the IMR drive system shown in FIGS. 2 and 4 is suitable for cold-rolling a rolled material S having a large deformation resistance, such as stainless steel or a copper alloy, into a plate material or a foil material. It is.

Note that the number of rolls constituting the IMR drive type multi-high rolling mill 1 and the rolling direction of the rolled material S are the same as in the case of the WR drive method, and a description thereof will be omitted.
In the multi-high rolling mill 1 that employs the IMR driving method, the work roll 2M that does not have the chock unit 6 is used, and the intermediate roll drive input unit 5 is configured so as not to input rotational driving force to the work roll 2M. The rotational driving force is input to the intermediate roll 3M supported by the above.

As shown in FIG. 2, the work roll 2M provided in the multi-high rolling mill 1 adopting the IMR driving method is a WR driving multi-stage so that a rolled material S such as stainless steel or copper alloy having a large rolling load can be rolled. A roll having a smaller roll diameter than the rolling mill 1 is used.
Further, as shown in FIG. 4, the work roll 2M does not have the above-described chock part 6, and since there is no chock part 6, the shaft part 8 of the work roll 2M and the universal spindle main body part 13 for work rolls. Are separated from each other and are not connected to each other. In the case of intermediate roll driving, the so-called idle gear is added to the pinion stand so that the driving force is not input to the universal spindle main body 13 for work rolls. Even if it is input to the work roll universal spindle main body 13, in the work roll 2M, the rotational driving force of the work roll universal spindle main body 13 is not input to the DS side shaft portion 8 of the work roll 2M.

As shown in FIG. 6, the intermediate roll drive input unit 5 uses the same member as it is without changing the same member as that of the WR drive type multi-high rolling mill 1. Therefore, a spline (female spline 17) is also formed on the inner peripheral surface of the recess 16 of the intermediate roll drive input unit 5 as in the case of the WR drive system. However, the bush member 19 needs to be removed when the intermediate roll is driven.
On the other hand, the intermediate roll 3M is different from the one used in the WR drive type multi-high rolling mill 1. In the intermediate roll 3M, the one arranged above the work roll 2W and the one arranged below the work roll 2W have the same structure, and all four have the same configuration.

  Each of the shaft end portions 14 of these intermediate rolls 3M is long enough to be inserted into the concave portion 16 of the intermediate roll drive input portion 5, and the diameter thereof is almost the same as or slightly smaller than the inner diameter of the concave portion 16. The shaft end 14 of the intermediate roll 3 </ b> M is not loosened with respect to the recess 16 and is fitted to the back of the recess 16. Further, a spline (male spline 18) is formed on the outer peripheral surface of the shaft end portion 14 of the intermediate roll 3M. The male spline 18 can be engaged with the female spline 17 of the intermediate roll drive input unit 5. Yes. That is, if the shaft end portion 14 of the intermediate roll 3M is inserted into the concave portion 16 of the intermediate roll drive input portion 5 and the male spline 18 is engaged with the female spline 17, the intermediate roll universal spindle main body 20 is connected to the intermediate roll via the pinion stand. The input rotational driving force of the drive motor can be transmitted to the intermediate roll drive input unit 5 and further transmitted to the intermediate roll 3M via the intermediate roll drive input unit 5, and the rotational driving force input to the intermediate roll 3M can be transmitted. It becomes possible to rotate the work roll 2M.

If the multi-stage rolling mill 1 employing the IMR driving system described above is used, it is possible to reliably cold-roll a rolled material S having a large deformation resistance, such as stainless steel or copper alloy.
By the way, although the multi-high rolling mill 1 of the present invention is one multi-high rolling mill 1, it corresponds to both the WR driving method and the IMR driving method described above.
Specifically, in the multi-high rolling mill 1 of the present invention, if the work roll 2W and the intermediate roll 3W corresponding to the WR driving method are replaced with the work roll 2M and the intermediate roll 3M corresponding to the IMR driving method, the driving method is changed. The WR drive method is switched to the IMR drive method. Further, if the work roll 2M and the intermediate roll 3M corresponding to the IMR driving method are replaced with the work roll 2W and the intermediate roll 3W corresponding to the WR driving method, the driving method is switched from the IMR driving method to the WR driving method. ing.

A drive method switching procedure will be specifically described.
When the drive method described above is switched from the WR drive method to the IMR drive method, the switching is performed according to the following procedure.
That is, as shown in FIGS. 3 and 5, the WR drive type multi-high rolling mill 1 is provided with a work roll 2 </ b> W supported by the chock unit 6, and rotational drive of the work spindle universal spindle main body 13. The force is input to the work roll 2W supported by the chock unit 6 as it is.

  On the other hand, the DS side shaft end portion 14 of the intermediate roll 3 </ b> W has a smaller diameter or a shorter length than the concave portion 16 of the intermediate roll drive input portion 5. Therefore, even if the shaft end portion 14 of the intermediate roll 3W is inserted into the recess 16 of the intermediate roll drive input portion 5, the rotational drive force of the intermediate roll drive input portion 5 is not transmitted to the intermediate roll 3W, and this intermediate roll drive The intermediate roll 3W is not rotated by the rotational driving force of the input unit 5.

  In the state where the WR drive system is adopted, first, the upper mill housing 15 is slightly moved upward with respect to the lower mill housing 15. If the upper mill housing 15 is moved upward, there is a vertical gap between the upper work roll 2W and the upper intermediate roll 3W, and the upper roll group (the upper intermediate roll 3W and the upper backup roll 4). And the lower roll group (the upper and lower work rolls 2W, the lower intermediate roll 3W, and the lower backup roll 4) are separated from each other.

Next, the upper chock part 6U is lifted using the hydraulic cylinder 12 built in the lower chock part 6D. A spacer (not shown) is inserted between the lower chock portion 6D and the upper chock 6U, and then the upper chock portion 6U is lowered by the hydraulic cylinder 12, and the upper chock portion 6U and the lower chock portion 6D are fixed by the spacer and integrated. Turn into.
In this state, the rearrangement rail 24 is raised by an elevating mechanism (not shown) so that the work roll rearrangement wheel 11 gets on the rearrangement rail 24.

The upper and lower work rolls 2W and 2W supported by the chock unit 6 are moved to the WS side using a hydraulic cylinder (not shown) or the like along the rearrangement rail 24 using the workroll rearrangement wheel 11, and the upper and lower workpieces are moved. The rolls 2W and 2W are removed from the multi-high rolling mill 1.
When the work rolls 2W are removed from the multi-stage rolling mill 1 in this way, all four of the upper and lower intermediate rolls 3W, 3W are then removed from the mill housing 15 using a roll changing device or the like. If it does in this way, it will become possible to remove all the rolls except the backup roll 4, ie, the work roll 2W, and the intermediate roll 3W, from the multi-high mill 1.

Subsequently, the bush member 19 is removed from the WS side end portions of the upper two intermediate roll drive input portions 5.
Thereafter, an intermediate roll 3M corresponding to the IMR driving method is attached to the multi-high rolling mill 1. The intermediate roll 3M includes a shaft end portion 14 having a large shaft diameter and a long shaft length. A male spline 18 that meshes with the female spline 17 of the recess 16 of the intermediate roll drive input portion 5 is formed on the outer peripheral surface of the shaft end portion 14. Therefore, if the shaft end portion 14 of the intermediate roll 3M is fitted into the concave portion 16 of the intermediate roll drive input portion 5 in the reverse procedure of the above-described removal, the male spline 18 of the intermediate roll 3M is input to the intermediate roll drive input. By engaging with the female spline 17 of the portion 5, the rotational driving force of the intermediate roll drive input portion 5 can be transmitted to the intermediate roll 3M, and the intermediate roll 3M can be rotationally driven.

  After all the four intermediate rolls 3M are attached in this way, the work roll 2M is then disposed between the upper and lower intermediate rolls 3M, 3M. The work roll 2M attached at this time does not have the chock part 6 and does not have a function of inputting the rotational driving force of the universal spindle body part 13 for work rolls. Therefore, even if the work roll 2M is attached between the intermediate rolls 3M, no rotation driving force is directly input to the work roll 2M, and the work roll 2M is rotated by the rotation driving force input to the intermediate roll 3M. As a result, the drive system of the multi-high rolling mill 1 can be switched from the WR drive system to the IMR drive system.

In the above example, the driving method of the work roll 2 is switched from the WR driving method to the IMR driving method. However, if the reverse procedure is performed, the driving method of the multi-high rolling mill 1 is changed from the IMR driving method to the WR driving method. It is also possible to switch to.
That is, the upper mill housing 15 is moved upward with respect to the multi-high rolling mill 1 driven by the IMR drive method using the work roll 2M and the intermediate roll 3M in substantially the same procedure as described above. At this time, since the upper work roll 2M can be lifted by the strip guide 7, there is a vertical gap between the upper work roll 2M and the lower work roll 2M, and the upper roll group (upper work roll 2M The intermediate roll 3M and the upper backup roll 4) are separated from the lower roll group (the lower work roll 2M, the lower intermediate roll 3M, and the lower backup roll 4).
Next, each roll is removed in the order of a pair of upper and lower work rolls 2M, 2M, and then an intermediate roll 3M using a roll rearrangement device or the like.

  Subsequently, the bush member 19 is attached to the WS side end portions of the upper two intermediate roll drive input portions 5. Next, the intermediate roll 3W is attached. The shaft end 14 of the intermediate roll 3W has a small shaft diameter and a short shaft length. This intermediate roll 3W is reverse to the above-described removal procedure, that is, the two intermediate rolls 3W are attached to the upper side of the lower backup roll 4, and the two intermediate rolls 3W are attached to the lower side of the upper backup roll 4. Install.

Thus, with respect to the multi-high rolling mill 1 to which the four intermediate rolls 3W are attached, the upper and lower work rolls 2W are further placed on the rearrangement rail 24.
At this time, the upper and lower work rolls 2W are inserted and fixed with spacers (not shown) between the upper and lower chock portions 6U and 6D.
The upper and lower work rolls 2W are attached by moving them in the DS direction with the work roll rearrangement wheels 11.

Finally, the upper chock part 6U is lifted using the hydraulic cylinder 12 built in the lower chock part 6D. A spacer (not shown) is taken out between the lower chock part 6D and the upper chock part 6U, and then the upper chock part 6U is lowered by the hydraulic cylinder 12 so that the upper chock part 6U and the lower work roll 2W are positioned in the height direction. To fix.
If it does in this way, it will become possible to switch the drive system of the multi-high rolling mill 1 from an IMR drive system to a WR drive system.

As described above, the rolling mill according to the present invention is a single multi-high rolling mill 1, and can be applied to both the WR driving method and the IMR driving method, and has various materials having a great difference in deformation resistance. Can be rolled.
In the rolling mill described above, also in the WR drive system, the intermediate roll universal spindle head section 25 and the intermediate roll universal spindle main body section on the opposite side to the side where the intermediate roll drive input section 5 is provided in the IMR drive system. Rotational driving force is also input from the drive motor through the pinion stand. The rotational driving force of the drive motor is constantly input to the work roll universal spindle and the intermediate roll universal spindle.

However, when the work roll is driven, the driving force is input only to the universal spindle for the work roll, and when the intermediate roll is driven, the driving force is input only to the universal spindle for the intermediate roll. It is good to be.
By adopting such a system, it is possible to switch the work roll drive system quickly and in a short time, and to facilitate switching between the WR drive system and the IMR drive system.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. In particular, in the embodiment disclosed this time, matters that are not explicitly disclosed, for example, operating conditions and operating conditions, various parameters, dimensions, weights, volumes, and the like of a component deviate from a range that a person skilled in the art normally performs. Instead, values that can be easily assumed by those skilled in the art are employed.

DESCRIPTION OF SYMBOLS 1 Multi-high rolling mill 2 Work roll 2W WR drive system work roll 2M IMR drive system work roll 3 Intermediate roll 3W WR drive system intermediate roll 3M IMR drive system intermediate roll 4 Backup roll 5 Intermediate roll drive input section
6 Chock part 6U Upper chock part 6D Lower chock part 7 Strip guide 8 Shaft part (of the work roll) 9 Shaft support part 10 Chock guide part 11 Work roll replacement wheel 12 Hydraulic cylinder 13 Universal spindle body part 14 for work roll (Intermediate roll) Shaft end 15 mill housing 16 recess 17 female spline 18 male spline 19 bush member 20 intermediate roll universal spindle body 23 work roll universal spindle head 24 recombination rail 25 intermediate roll universal spindle head S rolling material

Claims (5)

A multi-stage rolling mill having a work roll for rolling a rolled material, an intermediate roll for supporting the work roll, and a backup roll for supporting the intermediate roll,
A multi-high rolling mill, wherein a work roll driving method for inputting a rotational driving force to the work roll and an intermediate roll driving method for inputting a rotational driving force to the intermediate roll are switchable. In the work roll drive system, the rotational drive force is input to the work roll without inputting the rotational drive force to the intermediate roll,
In the intermediate roll drive system, the rotational drive force is input to the intermediate roll supported by the intermediate roll drive input unit without inputting the rotational drive force to the work roll. The multi-high rolling mill according to claim 1.   In the work roll drive system, a chock part that rotatably supports the work roll is provided, and a rotational driving force is input to the work roll supported by the chock part. The multi-stage rolling mill according to claim 2.   The shaft end on the drive side of the intermediate roll used in the work roll drive system is smaller or shorter than the shaft end on the drive side of the intermediate roll used in the intermediate roll drive system, thereby supporting the intermediate roll. The multi-high rolling mill according to claim 2, wherein the multi-roll mill is not connected to an intermediate roll drive input unit having a function of A driving motor for generating the rotational driving force; a pinion stand for branching the rotational driving force generated by the driving motor; a universal spindle for a work roll capable of inputting an output of the pinion stand to the work roll side; A universal spindle for intermediate rolls that can be input to the intermediate roll side,
In the work roll drive system, the state where the drive motor, the pinion stand, and the universal spindle for the intermediate roll are connected is maintained,
5. The multi-stage according to claim 2, wherein in the intermediate roll drive system, a state in which the drive motor, the pinion stand, and the universal spindle for the work roll are connected is maintained. Rolling mill.

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