JP3334771B2 - Rolling mill - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a rolling mill for rolling by crossing at least upper and lower work rolls.
The cross mechanism can be simplified, and the support of the thrust force can be simplified.

[0002]

2. Description of the Related Art A demand for a thickness accuracy of a rolled product in a sheet width direction is strict, and a cross-roll rolling mill that rolls by slightly crossing a work roll is one of the rolling mills that can cope with this.

In this cross roll rolling mill, a mechanism for crossing rolls is required for a rolling mill that rolls with parallel work rolls, and a mechanism for supporting a large thrust force generated by the roll cross is required.
Conventionally, various mechanisms have been proposed.

For example, in a cross-roll rolling mill disclosed in Japanese Patent Application Laid-Open No. 57-190704, FIG.
As shown in (1), slide blocks 3 and 3a are provided on the work-side roll chock 2 and the drive-side roll chock 2a of the roll 1 so that they can be slid by a hydraulic jack (not shown). causes cross the b Lumpur 1 as a cross-center Oc,
A cylindrical convex liner 4 and a plane liner 5 are provided between the roll chocks 2 and 2a and the slide blocks 3 and 3a so that the roll 1 can be easily crossed by moving the line contact position.

Further, Japanese Patent Application Laid-Open No. Sho 59-87914 (in addition to Japanese Patent Application Laid-Open No. 58-157504 and
In the method for setting the roll position of a cross-roll rolling mill disclosed in Japanese Patent Application Laid-Open No. 137104/137104), as shown in FIG.
a so as to be movable, the relative positions of the roll chocks 2 and 2a with respect to the absolute positions are detected and controlled, and the cross point of the roll 1 (cross center O
c) can be accurately set at the roll center (mill center) O.

Further, in a roll cloth rolling mill disclosed in Japanese Patent Application Laid-Open No. 57-195510, FIG.
As shown in (a), a pusher guide 6 and a choc clamp plate 7 are provided outside the roll chock 2 to support a thrust force generated by the roll cloth, and a rolling friction sliding device 8 is provided between them. The thrust force can be supported while being movable in the rolling force direction.

In a thrust receiving device of a cross-roll type rolling mill disclosed in Japanese Patent Laid-Open No. 59-87909, as shown in FIG. 2b, and the projection 2
b is provided on the housing,
A slider 9 that slides in the rolling direction is fitted on the clamp plate 7, and an eccentric roll 10 is rotatably mounted on the slider 9, and the eccentric roll 10 and the protrusion 2 b are synchronized by a link mechanism 11. It is connected to rotate,
When the cross angle is set, the roll 1 can be prevented from moving in the axial direction.

[0008]

SUMMARY OF THE INVENTION
The cross mechanism and thrust force support mechanism of the cross roll rolling mill have the following problems.

First, in the above description, roll chocks 2, 2
Since the guide surface a is constituted by the cylindrical convex liner 4 and the plane liner 5 and is in line contact, there is a problem that wear is likely to progress.

Further, in the above, in order to cross the cross point (cross center Oc) of the roll 1 as the roll center (mill center) O, the four ends of the roll 1 are turned around the centers Oc and O of the virtual space. There is a problem that the position of the roll chocks 2, 2, 2a, 2a must be strictly controlled, and there is a problem that if the cross point Oc is shifted, the rolled material will meander.

Further, in the above, in order to allow the thrust force to roll and move in the rolling force direction, the pusher guide 7 and the chock clamp plate 8 must be provided outside the roll chock 2 and must be provided outside the housing. There is a problem that a large member is attached and the structure becomes complicated.

Also, in the above, the eccentric roll 10 and the link mechanism 11 make it difficult to prevent the roll 1 from moving in the roll axis direction even if the cross center Oc of the roll 1 crosses the roll center O. There is a problem that a complicated mechanism is required and the structure becomes complicated.

As described above, the conventional cross roll rolling mill requires a mechanism for moving all the roll chocks 2 and 2a in order to cross the roll 1, and furthermore, a mechanism for supporting the thrust force generated by the cross. Are protruding largely outside the roll chocks 2 and 2a and the housing, and there is a problem that the cross roll rolling mill has a complicated structure.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and allows a cross mechanism for a roll to be simplified to set a high-precision cross angle, and a thrust force can be supported by a simple mechanism. It is intended to provide a rolling mill as described above.

[0015]

In order to solve the above-mentioned problems, a rolling mill according to claim 1 of the present invention comprises at least a vertical mill.
Rolls with a slight crossing of
And the turning centers of the rolls to be crossed
Axle boxes, and move these axle boxes to the other
A moving adjustment mechanism for adjusting a cross angle is provided, and the turning center is provided.
A convex partial cylindrical surface is formed on the
Part of the convex surface on the block that slides and supports the partial cylindrical surface
Form a concave partial cylindrical surface almost identical to the partial cylindrical surface,
Line direction transfer to a block with a concave partial cylindrical surface
To move the block to the roll changeable position,
Or the roll can be positioned at the cross angle forming position
While a moving mechanism is provided, the
With a thrust force support mechanism to support the strike force,
Then, through the thrust force support mechanism of the axle box to the block
It is characterized by being provided so as to support the transmitted thrust force.
Is what you do.

According to a second aspect of the present invention, in the rolling mill according to the first aspect, the center of rotation of the axle box is provided.
The other axle box and the block that supports these other axle boxes
Interview within this curved area
Form a sliding surface composed of gentle curved surfaces
Can move in the roll axis direction relative to the
It is characterized by being formed as described above .

Furthermore, the rolling machine according to claim 3, wherein the present invention, in addition to the configuration of claim 1 or 2, wherein the block
With a built-in hydraulic cylinder for roll bending
It is characterized by the following.

[0018]

[0019]

[0020]

[0021]

SUMMARY OF] According to the rolling mill of claim 1, wherein the present invention, low
At least the upper and lower work rolls are slightly crossed and rolled
In the rolling mill, the crossing roll is turning.
Let the hearts be in one axle box and
A movement adjustment mechanism is provided to adjust the cross angle by moving the axle box.
A convex partial cylindrical surface is formed on the axle box serving as the pivot center.
And a slide that slides and supports the partial cylindrical surface.
A concave partial circle substantially identical to the convex partial cylindrical surface
A block forming a cylindrical surface and having this concave partial cylindrical surface
Move in the line direction to the roll changeable position.
Retract the roll, or move the roll to the cross angle forming position.
While providing a moving mechanism capable of positioning, the turning center
Thrust force support mechanism that supports thrust force on axle box
And a thrust support of the axle box on the block.
The thrust force transmitted through the lifting mechanism has a support capable provided <br/> so that, together with the possible cross mechanism simple structure as compared with the case where the rotation center of the roll center, black
Simplification by halving the mechanism for
Can be Also, easily set the center of rotation of the cloth
Yes, the structure can be simplified, and the block is evacuated.
Then, the roll can be easily changed. In addition,
Move the roll end on the center
Rolling can be performed with the mill center aligned
At the same time, thrust force is applied to the housing through the block.
Be able to communicate and receive.

Further, according to the rolling mill of the second aspect of the present invention, the other axle box which is not the center of rotation and the other axle box is supported.
The sliding surface between the block and the
And the roll cross state is stable
Be able to maintain.

Further, according to the rolling mill of the third aspect of the present invention, the hydraulic cylinder is mounted on the block for moving the axle box.
Built-in, easy roll bending
Will be able to do it.

[0024]

[0025]

[0026]

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. 1 to 5 relate to an embodiment of the rolling mill according to the present invention. FIG. 1 is a schematic sectional view of a whole applied to a four-high rolling mill, FIG. 2 is a horizontal sectional view on a work roll, and FIG. FIG. 4 is a sectional view of a roll chock and a thrust force support mechanism, and FIG. 5 is a side view of the roll chock.

The rolling mill 20 includes upper and lower work rolls 2.
1 and 22 and upper and lower backup rolls 23 and 24, and a four-high rolling mill.
This is a work roll cross mill in which only the rolls 1 and 22 are slightly crossed and rolled.

In the rolling mill 20, the upper and lower work rolls 2
As a cross mechanism 25 for slightly crossing the work rolls 22, 22, only one of the roll chocks 26, 26a, 27, 27a at both ends of each work roll 21, 22 in the opposite direction is used. As shown in FIG. 3B, when the upper and lower work rolls 21 and 22 are crossed, the upper and lower work rolls 21 and 22 are parallelized. A point decentered by the eccentric amount e from the center (mill center O) when the cross angle is set to 0 in the state is the cross center Oc.

[0030] Such one roll chock 26, 2
Cross mechanism 25 for crossing only around 7a
Will be described in the case of the upper work roll 21.

In the cross mechanism 25 of the upper work roll 21, only one of the roll chocks 26, 26a at both ends is used as the center of rotation, and the side surfaces of the roll chock 26 in the front and rear directions in the line direction are convex portions. On the other hand, a pair of blocks 30 is arranged before and after the housing 29 in the rolling direction.
A concave partial cylindrical surface 31 having substantially the same curvature as that of FIG.

Therefore, the concave partial cylindrical surface 31 of the block 30 before and after the rolling direction installed in the housing 29 is supported with the convex partial cylindrical surface 28 of the roll chock 26 sandwiched therebetween, and the center OL of the roll chock 26 is positioned. The upper work roll 21 can cross as the center of rotation.

Thus, the center O of the upper roll chock 26
In order to cross the upper work roll 21 with L as the center of rotation, the other roll chock 26a is formed with a convex partial cylindrical surface 32 on the front and rear sides in the rolling direction, for example, as shown in FIG. On the other hand, a pair of blocks 33 are arranged before and after the housing 29 in the rolling direction, and are mounted so that each block 33 can be moved in the rolling direction before and after along a guide 34 attached to the housing 29. Are formed with flat surfaces 35 which are in contact with the partial cylindrical surfaces 32, respectively. Further, an actuator 37 is attached to the housing 29 as a movement adjusting mechanism 36 for moving the block 33 before and after the rolling direction,
The block 33 is connected to the tip of the actuator connection shaft 37a of each actuator 37.

Therefore, when the block 33 is moved back and forth in the rolling direction by extending and contracting the actuator connecting shaft 37a of the actuator 37 of the movement adjusting mechanism 36,
The one roll chock 26a of the work roll 21 is moved via the flat surface 35 of the roll chock 26a.
, The work roll 21 is turned at the center OL of the other roll chock 26, and the upper work roll 21 is crossed.

Similarly, the lower work roll 22 is pivotally supported by the partial cylindrical surface of the roll chock 27a and the partial cylindrical surface of the block so as to rotate about the center OR of the roll chock 27a opposite to the upper work roll 21.
An actuator is connected to a block that supports the other roll chock 27 so that the actuator can move and cross the block.

By doing so, the upper and lower work rolls 21 and
22 four roll chocks 26, 26a, 27, 27
a different roll chocks 26 and 27
a that constitutes the movement adjusting mechanism 36 only in the
7, the roll cloth can be realized with a simple structure.

The other roll chocks 26a, 27a provided with the movement adjusting mechanisms 36 and the roll chocks 26, 27a having the turning centers OL, OR at the time of the work roll cross.
27, convex partial cylindrical surfaces 28, 32 are respectively formed, a concave partial cylindrical surface 31 is formed on one of the blocks 30 in contact with the convex cylindrical surfaces, and a flat surface 35 is formed on the other block 33.
Is formed, so that the roll cloth can be made smooth and the work rolls 21 and 22 can be smoothly moved in the rolling force direction.

In this rolling mill 20, rolling is performed by crossing the upper and lower work rolls 21 and 22 in this manner. Since a thrust force is generated along with the rolling, it is necessary to support the thrust force. Provided.

The thrust force support mechanism 40 is provided in one of the roll chocks 26 and 27a which is the center of rotation when the upper and lower work rolls 21 and 22 are rolled.
For example, as shown in FIGS. 2 and 4, a flange-shaped thrust collar 41 is formed at an end of a work roll 21, and a roll chock 26 is provided on the front and rear surfaces thereof.
The roller type thrust bearing 42 supported by the roller is mounted so as to contact and roll, and supports the thrust force applied to the work roll 21.

In the thrust force support mechanism 40, the thrust force is transmitted from the thrust bearing 42 to the roll chock 26, and is transmitted to the block 30 via the partial cylindrical surface 28 of the roll chock 26 and the partial cylindrical surface 31 of the block 30. 30 is transmitted to the housing 29 where it is installed and is finally supported.

Both ends of the work roll 21 are rotatably supported by radial bearings 43 mounted in the roll chocks 26, 26a, respectively, so that smooth rotation is possible.

When the work rolls 21 and 22 are crossed, one of the roll chocks 26 and 27a is used as the center of rotation, so that the support position of the other roll chocks 26a and 27 must be changed. A clearance C that can be slid between the partial cylindrical surface 32 and the flat surface 35 between the roll chocks 26a, 27 and the block 33, or can be slid in the radial bearing 43.
Can be dealt with. (In an actual rolling mill, since the cross angle is small and the roll length is long, the amount of movement of the work roll in the axial direction is extremely small.) In the rolling mill 20 provided with such a thrust force support mechanism 40, the roll Roll chock 26, 27 which is the center of turning
The thrust force generated by the roll cloth can be supported by the thrust collar and the thrust bearing formed in the inside of the roll chock 26, 27a, and a simple structure without providing a support mechanism such as a large arm outside the roll chocks 26 and 27a. Become.

In the rolling mill 20, the cross center Oc of the upper and lower work rolls 21 and 22 is set to a value equal to 0 in order to facilitate the exchange of the upper and lower work rolls 21 and 22.
Roll chocks 26, 27 which are the center of rotation of the roll cloth in order to be able to perform rolling in a state in which the mill center 0 coincides with the rolled state and to cope with diversification of rolling conditions.
a is also provided with a movement adjusting mechanism 45.

In this movement adjusting mechanism 45, as shown in FIGS. 2 and 3, for example, actuators 46 for moving the blocks 30 in the front and rear directions in the rolling direction are attached to the housing 29. The block 30 is connected to the tip of the.

Accordingly, when the block 30 is moved back and forth in the rolling direction by extending and contracting the actuator connecting shaft 46a of the actuator 46 of the movement adjusting mechanism 45,
The convex partial cylindrical surface 28 of one roll chock 26 of the work roll 21 is pushed through the concave partial cylindrical surface 31 of the work roll 21, and the movement of the roll chock 26 causes the work roll 21 to turn, and the upper and lower work rolls 21, 22. Can be made to coincide with the mill center O.

Further, the actuator connecting shaft 46a is retracted so that the pair of blocks 30 sandwiching the roll chock 26 in the front and rear directions of rolling are retracted.
When both ends of the concave partial cylindrical surface 31 of the pair of blocks 30 are retracted, the work rolls 21 and 22 together with the roll chock 26 can be easily taken out of the housing 29, and the roll exchange can be easily performed.

In the rolling mill 20, not only the upper and lower work rolls 21 and 22 are crossed to perform rolling, but also roll bending can be performed. As shown in FIGS. 4 and 5 (right side of FIG. 4), the roll chocks 26 are provided with a fluid bending cylinder 50 for roll bending between the roll chocks 26 and the block 30 in a vertical direction. The upper work roll 26 can be bent by the supply of the hydraulic oil.

Further, in the rolling mill 20, the center of rotation OL, when the upper and lower work rolls 21 and 22 are crossed.
A flat surface 35 is formed on the block 33 on the side provided with the movement adjusting mechanism 36 opposite to the one of the roll chocks 26, 27a to become the OR to support the convex partial cylindrical surfaces 28, 32 of the roll chocks 26a, 27. Instead, as shown in FIGS. 2 and 8, a concave curved surface 55 is also formed at the tip of the block 33 moving for the roll cloth, and the work rolls 21 and
Considering the displacement of the roll 22 in the roll axis direction, the curved surface 55 is formed to be a gentle curved surface larger than the curvature of the convex partial cylindrical surface 26 of the roll chocks 26a and 27, and to have a surface contact having a larger contact area than in the case of line contact. It is formed in.

In the actual rolling, since the cross angle of the roll cloth is small, the curved surface 55 formed at the end of the block 33 has a curvature substantially equal to the curvature of the convex partial cylindrical surface 26 of the roll chocks 26a and 27. Of the work rolls 21 and 22 caused by the roll cross by the clearance of the inner races of the radial bearings of the work rolls 21 and 22. It is also possible to ensure that the roll cloth is smoothly carried out, and at the same time, the contact area is increased to support the roll chocks 26a and 27, thereby maintaining the roll cloth state.

Further, since the rolling mill 20 performs work roll cross rolling in which only the upper and lower work rolls 21 and 22 are crossed, the upper and lower backup rolls 23 and 24 are normally held in a parallel state at the mill center O for use. However, the backup rolls 23 and 24 are also
As shown in the figure, the same mechanism as the upper and lower work rolls 21 and 22 is provided so that the upper and lower work rolls 21 and 22 can be crossed independently of each other, and the contact state with the work rolls 21 and 22 is changed. In this way, the rolling conditions can be diversified by changing the distribution of loads applied to the work rolls 21 and 22.

[0051] In the rolling mill 20 thus constructed, the work roll cross rolling of various forms can line Ukoto as follows.

The cross center Oc of the roll and the mill center O
Work roll cross rolling with eccentricity.

In this case, the upper and lower work rolls 21 and 22
This is work roll cross rolling in which only one of the opposite roll chocks 26, 27a is used as the center of rotation OL, OR, and the other opposite roll chocks 26a, 27 of the upper and lower work rolls 21, 22 are moved by the movement adjusting mechanism 36. This sets the cross angle.

Then, as shown in FIG. 3B, the cross center Oc of the upper and lower work rolls 21 and 22 crosses at a position shifted from the mill center O by the amount of eccentricity e. In the cross-sectional state, as shown in FIG. 7 (a), the turning centers OL, O
R is equal to the mill center O, and the other end is shifted from the mill center O to be in a state of rolling.

In this manner, the upper and lower work rolls 21 and
2 and cross-rolling, the upper and lower work rolls 2
It can be easily realized by merely providing the movement adjusting mechanism 36 on the roll chocks 26a, 27 on the other side of the turning centers OL, OR of the crosses 1 and 22, respectively.

The cross center Oc of the roll is changed to the mill center O
Work roll cross rolling performed in accordance with.

In this case, from the cross state of the upper and lower work rolls 21 and 22, the roll chocks 26, 26a, 27 and 27a at both ends are separated by a distance corresponding to the eccentricity e between the cross center Oc and the mill center O. 29, and the roll chock 2 on the other side of the center of rotation OL, OR of the cross between the upper and lower work rolls 21, 22.
6a and 27 are moved by the movement adjusting mechanism 36 and moved parallel to the cross state, and at the same time, they are moved in parallel by the movement adjusting mechanisms of the roll chocks 26 and 27a on the turning centers OL and OR.

When the upper and lower work rolls 21 and 22 are moved in a parallel state in addition to the movement in the cross state so that the cross center Oc and the mill center O coincide with each other, FIG. 6B shows a plane state and FIG. As shown in the side view in (b), both ends of the upper and lower work rolls 21 and 22 are at the mill center O.
The cross center Oc and the mill center O
And normal work roll cross rolling can be realized.

Work roll cross rolling in combination with backup roll offset.

Each of the upper and lower backup rolls 23 and 24 is provided with a movement adjusting mechanism (not shown) which is the same as the upper and lower work rolls.
When the upper and lower backup rolls 23, 24 are moved by the movement adjusting mechanism at the same time as the crossing of 1, 2 is performed,
For example, as shown in FIG.
3, 24 can be offset from the mill center O.

As a result, the distribution of supporting the load of the backup roll 23 (24) with respect to the work roll 21 (22) can be changed, and the range in which rolling conditions such as the roll crown can be changed can be expanded.

Work roll cross rolling in combination with work roll bending.

In the rolling mill 20, the blocks 30, 33
A hydraulic cylinder for roll bending is provided between the hydraulic cylinder and the roll chocks 26, 26a, 27, 27a. A hydraulic fluid (for example, hydraulic oil) is supplied to these hydraulic cylinders to extend and contract the rod. Work roll bending can be performed, and in combination with a work roll cloth, control of the thickness distribution of a single layer can be performed in a wide range.

Support of thrust force accompanying roll cloth.

When the work rolls 21 and 22 are cross-rolled, a thrust force is generated in the roll axis direction, and a mechanism for supporting the thrust force is required. Center of rotation OL
, OR, a thrust bearing 42 is provided in the roll chocks 26, 27a so as to support a thrust collar 41 formed at the end of the roll.
, The structure is simple, and the roll can be easily replaced.

The roll chocks 26a and 27 on the opposite side of the roll chocks which are the center of rotation of the roll cross also form the convex partial cylindrical surface 32 and the concave partial cylindrical surface and the curved surface 55 on the block 33 side. By doing so, the cross state of the upper and lower work rolls 21 and 22 can be stably maintained, and the displacement in the roll axis direction caused by the roll cross can be absorbed by the curved surface 55 and the clearance of the inner race of the radial bearing 43. Can be.

[0067]

Effect of the Invention] According to the rolling mill of claim 1, wherein the present invention as specifically described with examples, small
At least the upper and lower work rolls are slightly crossed and rolled.
The rolling center of the roll to be crossed.
Are used as one axle box, and the other
A movement adjustment mechanism that adjusts the cross angle by moving the box is provided,
Forming a convex partial cylindrical surface on the axle box as the pivot center
A block that slides and supports this partial cylindrical surface
A concave partial cylindrical surface substantially identical to the convex partial cylindrical surface
Formed on the block with the concave partial cylindrical surface.
Move the block in the direction
Retract the roll or position the roll at the cross angle forming position.
While providing a moving mechanism that enables
A thrust force support mechanism that supports thrust force
And a thrust force support machine for the axle box
Since the so that providing a thrust force transmitted through the structure to be supported, it is possible to simplify construction cross mechanism as compared with a case where swirling around the roll center, the cross
Mechanism for the other half of the axle only
Can be. Also, you can easily set the center of the cross
The structure can be simplified and the blocks can be retracted.
In this way, the roll can be easily changed. In addition, turning
Move the roll end on the center side to
Can be rolled with the center of
The thrust force is transmitted to the housing
Can be

According to the rolling mill of the second aspect of the present invention, the other axle box which is not the center of rotation and the other axle box is supported.
The sliding surface between the block and the
So that the roll cross condition is stable
Can be maintained.

Further, according to the rolling mill of the third aspect of the present invention, the hydraulic cylinder is mounted on the block for moving the axle box.
Built-in roll-bending is easy
It can be carried out.

[0070]

[0071]

[0072]

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view of an entire rolling mill applied to a four-high rolling mill according to an embodiment of the present invention.

FIG. 2 is a horizontal sectional view on a work roll according to an embodiment of the rolling mill of the present invention.

FIG. 3 is an explanatory diagram of a cross state of a work roll according to an embodiment of the rolling mill of the present invention.

FIG. 4 is a sectional view of a roll chock and a thrust force support mechanism according to an embodiment of the rolling mill of the present invention.

FIG. 5 is a side view of a roll chock according to an embodiment of the rolling mill of the present invention.

FIG. 6 is a cross-sectional plan view of a work roll and a backup roll according to another embodiment of the rolling mill of the present invention.

FIG. 7 is a side view of a work roll cross rolling state according to an embodiment of the rolling mill of the present invention.

FIG. 8 is a plan view of a work roll in a supported state according to still another embodiment of the rolling mill of the present invention.

FIG. 9 is a schematic plan view of a conventional rolling mill.

FIG. 10 is a schematic plan view of a conventional rolling mill.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 20 Rolling machine 21 Upper work roll 22 Lower work roll 23 Upper backup roll 24 Lower backup roll 25 Cross mechanism 26 Roll chock 26a to be the center of rotation Roll chock 27 to the side of movement 27 Roll chock to the side of movement 27a Roll chock to be the center of rotation 28 Convex partial cylinder Surface 29 Housing 30 Block (rotating center side) 31 Concave partial cylindrical surface 32 Convex partial cylindrical surface (moving side) 33 Block (moving side) 34 Guide 35 Flat surface (moving side) 36 Movement adjusting mechanism (moving side) 37 Actuator 37a Actuator connection shaft 40 Thrust force support mechanism 41 Thrust collar 42 Thrust bearing 43 Radial bearing 45 Movement adjustment mechanism (turning center side) 46 Actuator 46a Actuator connection shaft 50 Fluid pressure cylinder Funding for) 55 curved (moving side) C clearance O mill center Oc cross center OL turning center (upper roll) OR turning center (lower roll)

Continuation of the front page (56) References JP-A-5-277528 (JP, A) JP-A-60-118309 (JP, A) JP-A-60-111702 (JP, A) JP-A-49-83655 (JP, A) JP-A-8-197110 (JP, A) JP-A-53-127353 (JP, A) JP-A-56-36307 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB Name) B21B 13/14 B21B 29/00 B21B 31/02 B21B 31/16

Claims (3)

(57) [Claims] (1) At least slightly lower and upper work rolls
In a rolling mill for rolling with loss, the cross is made
The center of rotation of the roll is one axle box and the other is the opposite
Move these axle boxes to the other axle boxes to adjust the cross angle
An adjusting mechanism is provided to form a convex partial cylindrical surface on the axle box serving as the pivot center.
A block that slides and supports this partial cylindrical surface
A concave partial cylindrical surface substantially identical to the convex partial cylindrical surface
Formed on the block with the concave partial cylindrical surface.
Move the block in the direction
Retract the roll or position the roll at the cross angle forming position.
A thrust that supports a thrust force on the axle box that is the center of rotation while the moving mechanism is provided.
A force support mechanism is provided, and the block is
Supports the thrust force transmitted via the thrust force support mechanism
A rolling mill characterized by being provided so as to be held . 2. The other shaft of the axle box that is not the center of rotation.
Between the box and the block supporting these other axle boxes
Gently to form a curved surface and make surface contact in the range of this curved surface
It forms a sliding surface consisting of a curved surface and
Formed so that it can relatively move in the roll axis direction.
2. The rolling mill according to claim 1, wherein: 3. A flow for roll bending is provided on said block.
3. The rolling mill according to claim 1 , further comprising a body pressure cylinder .