JPH07164015A - Rolling mill having axially movable roll - Google Patents

Abstract

PURPOSE: To axially move a roll without stopping product supply within a wide range of a roll gap by attachably and detachably combining an axially moving means of the roll sliding along a stand vertical member to a roll driving element. CONSTITUTION: A roll 2 and an auxiliary chock 4 fixed to the end part 24 are moved by axially moving jacks 5a, 5b using hook type sliding members 53a, 53b and the auxiliary chock 4. At this time, the locking state at an axial position to the vertical member 11 of a stand is maintained by sliding chocks 3a, 3b of the roll 2 along necks 22a, 22b. In order to match the largely varying height of the work roll 2, a carriage 6 having the jack 5 is vertically moved along a slider 61 by an auxiliary jack fixed to the vertical member 11 of the stand. At this position, the side part 45 of the auxiliary chock 4 is engaged with a notch 54 of the hook type sliding member attached to the carriage 6 together with the axially moving jack 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling mill capable of moving rolls in an axial direction capable of widening a roll gap, such as a rolling mill used for hot rolling non-ferrous metals such as aluminum. Is.

[0002]

2. Description of the Related Art Generally, a rolling mill has two work rolls stacked one on top of another, and a metal plate or wire to be rolled is rolled by a reduction force applied to the rolls when passing between them. . There are various types of rolling mills, such as a double rolling mill having only two work rolls having a relatively large diameter, a quadruple rolling mill combining two work rolls each having a small diameter with two backup rolls. A six-fold rolling mill in which an intermediate roll is arranged between a backup roll and a corresponding work roll is well known. Generally, the axes of all rolls lie in substantially the same sliding plane, called the "pressure face". Another type of rolling mill is also known in which each work roll is combined with a plurality of backup rolls symmetrically arranged on both sides of the pressing surface.

The axes of the rolls are generally substantially parallel and are stacked one above the other inside a stand having two vertical members spaced apart from each other. Each roll is concentric with two necks aligned with each other, each neck of a window formed in a corresponding vertical member of the stand, which window acts as a guide surface for sliding the chock parallel to the pressure surface. It is rotatably supported via a bearing in a chock that can slide inside. In general, a mechanical or hydraulic jack placed between the stand and the chock of one backup roll exerts a reduction force and the other backup rolls are locked,
The roll gap is such that a certain rolling action is applied to the material passing between the work rolls.

The width of the material to be rolled varies depending on the work program, but is generally shorter than the length of the working part of the work roll. Therefore, the work roll is not uniformly applied with force, but is slightly curved, and more pressure is applied to the lateral end of the product. Many methods are known for eliminating this drawback. In particular, many modern rolling mills are equipped with a device for applying a unidirectional bending force to the end of the work roll in order to correct the stress distribution in the width direction of the product. Generally, this type of bending apparatus has a jack supported by a chock at both ends of each roll.

In more sophisticated rolling mills, the two work rolls are moved relative to each other in parallel with the axis so that the distance between the opposite ends of the two work rolls approximately corresponds to the width of the product to be rolled. Is able to. That is, a drive device for moving at least one roll in the axial direction is provided. For example, one or more jacks may be fixed at a height that corresponds to the vertical member of the stand, which is then used to lock one of the roll chock
Connected to one.

However, it would be extremely advantageous to have two systems that allow the axial relative positions of the two work rolls and yet use a bending jack to modify the stress distribution. In a six-fold rolling mill, the two actions can be separated, bending stress can be applied to the work roll, and the amount of axial movement can be adjusted by the intermediate roll.
In heavy or quad rolling mills, axial adjustment and bending must be done on the work rolls that are in direct contact with the product.

Also, it is often necessary to remove each roll for maintenance or replacement. For that purpose, the two chocks of each roll are axially rigidly locked to the roll and are removed together with the roll. In other words, when the roll is moved axially, the two chocks will also move with the roll relative to the vertical member of the stand. Bending means may be attached to a support member that slides with the chock, but this would complicate the equipment and hydraulic circuit. It is also possible to fix the bending means to the vertical member of the stand and to provide a sliding support so that the chock can be displaced, but this causes the center of force to be displaced.

In order to prevent these drawbacks, JP-A-57 / 1982
In −177,810, a neck is provided at both ends of a movable roll, the length of this neck is lengthened by the axial movement distance, and it is extended by a length corresponding to the gap between chocks that increases according to the movement distance. Along the sliding roll neck, the roll is allowed to slide axially against the corresponding chock bearing. In this patent, the axial movement means are arranged on one side of the roll and the drive element at the end of the sliding roll neck (the drive element of the outer part for moving the roll axially without disturbing the rotation of the roll). It is rotatable above and is axially wedged to the neck) and is supported at one end of the corresponding neck. Furthermore, in recent equipment, it is desired to be able to change the axial position of the roll without stopping the rotation and to change the bending amount of the roll bending (for example, to continuously change the width without stopping the supply of the wire rod). When changing to).

However, another problem arises because the rolling interval must be changed according to the product thickness. That is, for example, in the case of a finishing line or rolling of a relatively thin metal plate, a slight change is required, but the height position of the work roll often needs to be greatly changed. For example, when rolling a non-ferrous metal, or more generally when the same rolling mill needs to be used for roughing and finishing, it is necessary to allow the roll gap to be changed over a wide range.

[0010]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems and to enable a roll to be moved in the axial direction without stopping the product supply even in the case of a rolling mill having a very large roll gap range. To provide a rolling mill that has

[0011]

SUMMARY OF THE INVENTION The present invention provides at least two inside of a stand having two vertical members spaced apart from each other.
And a means for moving at least one roll parallel to the roll axis,
The two aligned necks of each roll are rotatably supported by axially movable bearings on the chock that are guided on the corresponding vertical members of the stand parallel to the pressure surface passing through the roll axis. Each roll neck can slide axially along the sliding roll neck with respect to the corresponding chock bearing, and the means for moving the roll axially is defined by the axially movable roll Axially movable roll, such as being supported at the end of at least one neck by means of a drive element pivotally supported at the end formed beyond the sliding roll neck. The present invention relates to a rolling mill having

A feature of the present invention is that at least one work roll is movable in parallel along the vertical member of the stand to adjust the spacing between the work rolls, and the variable height roll is moved axially. Means are removably coupled to the drive elements of the roll and mounted on a carriage, the carriage sliding between a retracted position and a drive position along a vertical member of the stand parallel to the pressure surface. The height can be adjusted to the height of the roll which can be moved and is movable in the axial direction.

In a preferred embodiment of the invention, at least the means for axially moving the roll of variable height comprises at least one hydraulic jack, the body of which is along the vertical member of the stand. Affixed to a sliding carriage, the piston rod of which has means for releasably engaging a drive element which is axially rigidly locked to the neck of a roll whose height can be changed.

In a further preferred embodiment of the invention, the means for axially moving the rolls themselves are at least variable in height and are arranged symmetrically on either side of the pressure face and are driven synchronously. Each of the jacks is mounted on two carriages which are movable in synchronism with each other, and the carriages are detachably engaged with two side members of the drive element extending symmetrically on both sides of the axis of the roll. Have the means to combine.

A means such as a jack for axially moving the roll is fixed to a carriage slidable along a vertical member of the stand, at least one carriage having a sensor for indicating its position. Means for adjusting the position of the carriage with respect to the height of the roll which is moved in the axial direction and for moving the roll in the axial direction, rotatably attached to the drive element locked in the rigid state in the axial direction of the roll. And a means for sliding the carriage along the vertical member so as to align. The invention includes other preferred embodiments as claimed in other claims. Hereinafter, specific examples of the present invention will be described, but the present invention is not limited to the following examples.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the main parts of a quadruple rolling mill (the left half of FIG. 1 represents the minimum roll gap and the right half represents the maximum roll gap). This rolling mill has a set of rolls mounted inside a stand 1, that is, two work rolls 2 and 2'arranged above and below the feed surface P1 of the product to be rolled, and the work rolls 2 and 2 '. It has two backup rolls 20 and 20 'which are in contact with the farthest side from the product to be rolled. Each roll 2, 2 ', 20, 2
The 0'axes are substantially parallel to each other and are usually located in the same pressure plane P2 as the plane of symmetry of the stand. FIG. 2 is a cross-sectional view passing through the pressure surface P2. As can be seen from this figure, each work roll 2, 2'has a cylindrical work part 2
1, 21 'and two necks (thinned portions) 22 concentric with the roll axes x, x'. Each neck 22 has a cylindrical roll neck 23 which is rotatably supported in a known manner on chocks 3, 3'having roller bearings 31 housed in bearing housings 32. Similarly, the roll neck of each backup roll 20, 20 'is also chocked.
It is rotatably supported by 30.

The stand 1 basically consists of two vertical members 11 connected to each other by a cross beam 12 and separated from each other. The roll is located between these two vertical members. The chock 3 of the work roll 2 and the chock 30 of the backup roll 20 have a sliding surface 33 (FIG. 1). These sliding surfaces 33 are two vertical members
Inside the windows 13 formed in the upper and lower windows 11, the upper and lower parts are arranged one above the other, and along the corresponding guide surfaces 14 provided on both sides of each window 13, the pressure lower surface P is formed.
It is possible to slide in parallel with 2. The rolling force is applied between the backup rolls 20 and 20 'by known mechanical or hydraulic means,
2, 2 ', whereby the product passing between the work rolls along the feed surface P1 is rolled.

Any known device other than the above can be attached to the stand 1, but details thereof will be omitted. For example, the products are typically sent on roller tables located on either side of the rolling mill. The height of the roller table is almost the same as the height of the upper bus bar of the lower work roll 2'which is in contact with the lower backup roll 20 '. Therefore, these rolls 20 ', 2'are arranged at a substantially constant height. On the other hand, the height of the backup roll 20 combined with the work roll 2 on the upper side is a value obtained by adding the product thickness to the width of the gap between the work rolls 2 and 2 ′, and varies in a wider range. As already mentioned, this rolling mill is also provided with a bending device. The bendig device exerts a force on the chocks so that the chocks are clamped or separated from each other to impart a "negative" or "positive" bow to the work roll. In another embodiment of the invention, the work roll chock is axially locked to the stand and backup roll. Therefore, since the bending means can be directly attached to the chock, it is possible to prevent the deviation and slippage from the center.

In the embodiment shown as an example, the lowering roll 20 'is such that the rolling force has almost no change in height.
It is added to the chock 30 'by means not shown. The width of the roll gap can be adjusted in a wide range for each pass between the minimum opening position shown on the left side of FIG. 1 and the maximum opening position shown on the right side of FIG. 1 by determining the height of the upper backup roll 20. You can This height adjustment is done by the bolt 15. Auxiliary jack for this bolt 15
The chocks 30 of the backup roll 20 are brought into contact with each other by 16. The auxiliary jacks 16 engage the corresponding lugs of each chock and are fixed to the fixed cross beam 12. The jack 17 arranged between the chocks of the work rolls 2 and 2'is supported by the chock of the lower work roll 2'which is in contact with the lower backup roll 20 ', and the upper work roll 2 is attached to the upper backup roll 20. Used to press against.

The roll gap can be adjusted over a large distance depending on the thickness of the product to be rolled. Especially in the case of non-ferrous metals, the same rolling mill is first used as a roughing rolling mill,
It can then be used as a finishing mill. The size of the jack 17 that determines the distance between the work roll chocks 3 and 3'is the chock of the backup roll 20, 20 'on one side.
By directly supporting 30, 30 'and the opposite side by directly supporting the chocks 3, 3'of the work rolls 2, 2', by opening the chocks in the opposite direction against the action of the positive bending jack 34. The size is such that negative bending force can be applied to. As shown in FIG. 2, the cylindrical roll neck 23 of each neck 22 slides axially inside the inner cage 35 of the bearing 31 of the corresponding holding chock 3 to allow axial movement of the work rolls. You can do it. The length L1 of the roll neck 23 is at least equal to the width L2 of the bearing 31 plus the maximum axial movement range D.

Accordingly, when the axial position of the roll 2 is adjusted, the neck 22 slides inside the corresponding bearing.
When sliding along 23, the holding chocks 3a, 3b are axially locked to the stand 1. The inner cage of each bearing is mounted in a bush 35 having a cylindrical inner surface, the diameter of which is preferably equal to the diameter of the sliding roll neck 23, except for assembly clearance. FIG. 3 is a one side detailed cross-sectional view showing two axial positions of the work roll 2. As you can see from this figure, each vertical member of the stand
11 is a lock 18 that can be moved at right angles to the pressure surface P1 by a jack so as to engage with the side portion 36 of the chock 3.
Is preferably provided to block the axial movement of the chock 3 with respect to the vertical member 11 in a state in which the height of the chock 3 can be adjusted by sliding in the vertical direction.

The force for moving the roll axially is preferably applied by one or more jacks mounted on the auxiliary chock 4. Auxiliary chock 4 slides roll neck 23
It is attached to an end 24 of a neck 22 extending outwardly beyond. This auxiliary chock 4 has a roller bearing 41 housed in a bearing housing 42, the inner cage of which is the end 24 of the neck 22.
Is fitted into. The end 24 is separated from the sliding roll neck 23 by a shoulder 25. The auxiliary chock 4 is preferably pressed and locked in the axial direction toward the shoulder 25 by a known method, for example, a screw wheel 43. The axial movement of each work roll 2, 2'is effected by two jacks 5a, 5b mounted on opposite sides of the window 13 on opposite sides of the vertical member 11 of the stand. In order to be able to follow the change in height of the upper work roll 2 that can be adjusted over a wide range, each jack 5a, 5b for this axial movement is the corresponding portion of the vertical member 11 of the stand by the force of the jack 66. Slider fixed to
It is attached to a support member, that is, a carriage (carriage) 6, which is slidable in the axial direction along 61. As shown in FIG. 3, the slider 61 has a sliding surface 63 held by the arm 62 at a certain distance from the vertical member 11 and parallel to the pressure surface P1.
It is preferable to have a part having

Each carriage 6 is held by a slider 61 via an engaging member 64. Therefore, the hook type sliding member 53
Moves in parallel along the carriage 6. A slider 68 is provided above the carriage in parallel with the roll axis x'x. The hook-type sliding member 53 is fixed to the end of the piston rod 52 of the jacks 5a and 5b for axial movement. The main bodies of the jacks 5a and 5b are fixed to a base portion 65 forming a part of the carriage 6. The base portion 65 defines a contact surface of the jack 5 which is perpendicular to the roll axis line x'x. Each hook type sliding member 53a, 53b driven by the axially moving jacks 5a, 5b has a notch 54. The notches 54 engage lateral portions 45 formed on the two lugs (legs) 44 of the auxiliary chock 4 which extend horizontally on both sides of the roll axis x'x.

The auxiliary chock 4 can rotate in its bearing 41 and is held in a horizontal position by at least one rod 36 fixed to one side of the chock 3 and from the chock 3 in a direction parallel to the axis x'x of the roll 2. It extends outward in the overhang state. The end of the rod 36 opposite to the end of the auxiliary chock 3 slides in the bore 46 of the auxiliary chock 4. Therefore, the auxiliary chock 4 is held horizontally and is prevented from rotating together with the roll 2 in a state where it can be slid in the axial direction. Each notch 54 is a jack for a bendig 1
In order to allow the auxiliary chock 4 to move slightly in the vertical direction when the roll 2 is deformed to the axis line x'x by the action of 7, 34, the hook type sliding member 53 extends vertically in the entire height direction. There is. As shown in FIG. 2, the two necks 22a and 22b of each work roll are provided with an auxiliary chock 4 in which only one of them, for example, the right neck 22b is connected to the jack 5 for axial movement. It is mounted so that it can slide on each chock 3, 3'as well.

With the above structure, the hook type sliding member 53a,
By using 53b and the auxiliary chock 4, two axially moving jacks 5a, 5b are provided on the roll 2 and its ends.
The auxiliary chock 4 axially fixed to 24 is moved in the axial direction, and at this time, the chocks 3a and 3b of the work roll 2 slide along the necks 22a and 22b of the work roll 2 against the vertical member 11 of the stand. The state in which the axial position is rigidly locked can be maintained.

As already mentioned, the height of the upper work roll 2 can be changed greatly, and therefore the height of the auxiliary chock 4 for moving the roll in the axial direction can also be changed. Each carriage 6 having a jack 5 for moving the upper roll 2 in the axial direction in order to match the height of the roll is moved by a corresponding slider 61 by the action of the auxiliary jack 66.
Can be moved vertically along. The main body of the auxiliary jack 66 is fixed to the vertical member of the stand, and the end of its piston rod is articulated to the carriage 6. That is, by using the auxiliary jack 66, the heights of the two carriages 6a and 6b are set so that the two carriages 6a and 6b combined with the auxiliary chock 4 of the upper roll 2 are located at substantially the same position as the height of the chock 4. Adjust. In this position, the lateral part 45 of the auxiliary chock 4 is engaged with the notch 54 of the hook-shaped sliding member 53 mounted on the carriages 6a, 6b together with the jack for axial movement.

The lower work roll 2'is also provided with a similar auxiliary chock, and the two jacks 5'for axial movement combined with the auxiliary chock are two carriages.
It is attached to 6 ■ (Fig. 6). In the illustrated embodiment, the height of the lower backup roll 20 'and the lower work roll 2'above it changes only slightly, so that it is not necessary to change the height of the corresponding carriage 6'during operation.
The height of this carriage 6'is the same as the height of the lower work roll 2'and can therefore be used as a reference when adjusting the height of the upper carriage 6. for that reason,
A linear sensor 67 having a sliding rod is attached to each upper carriage 6. The end of this sensor 67 is connected to the lower carriage 6 '. The sensor 67 outputs a signal representing the height of the two upper carriages 6, and this signal is processed by a general control system of the rolling mill to produce a work roll.
The jack 66 is driven so as to adjust the height of the upper carriage 6 with respect to the lower carriage 6'according to the distance between 2 and 2 '. As shown in FIG. 6, the axial position of each roll 2 is similarly controlled by the sensor 69. The main body of the sensor 69 is fixed to the bottom portion 65 of the corresponding carriage 6, and its movable rod is connected to the hook type sliding member 53 that moves in the axial direction.

With the above arrangement, in particular the arrangement in which the chocks 3, 3'can be locked in the axial direction, the jacks 17, 34 for bending can be mounted directly on these chocks, and thus the bearings of these jacks 17, 34 for the bearings. A good centering state can be maintained, and a warping action can be exerted at the same time as the axial movement of the work rolls 2, 2 '. Moreover, according to the present invention, the work roll
The distance between 2, 2'can be adjusted over a wide range and the drive for axial movement can be quickly moved to the corresponding roll height.

Rolls, especially work rolls, are inspected and maintained,
It may need to be removed periodically for replacement. For this reason, the rolling mill stand is generally provided with a horizontal slider at a predetermined height at which the corresponding bearing portion of the chock of each roll remains stationary. Generally two
The two work rolls are simultaneously removed from the stand with the upper roll on top of the lower roll.

In the apparatus of the present invention, when removing the work rolls 2 and 2 ', first, the upper roll 2 is the lower roll.
The upper roll is lowered to the position shown on the left side of FIG. 1 in contact with 2'and then the two carriages 6 are lowered by jacks 66 to the same height. As shown in the detailed view of FIG. 5, the upper carriage 6 has a hook 7. In addition, the lower carriage 6'has a corresponding hook 71 that can rotate around the horizontal axis.
When the carriage 6 is lowered, the hook 7 is securely engaged with the hook 71 by the force of the spring 73 incorporated in the hook 71. Auxiliary jack when opening the hook 71
72 can be used.

Next, the axially moving jack 5 moves the two work rolls 2, 2'to the rightmost position shown in the upper half of FIG. In this position the rod 36 is the auxiliary chock 4
It is just fitted into the bore 46 of. A groove 37 is formed at the height of the back surface of the auxiliary chock 4 at the end of the rod 36. Further, the auxiliary chock 4 is provided with an engagement lever 8 rotatable about an axis 81 (FIG. 4). The arm 82 extending from the engaging lever 8 keeps the hook 8 in the open position against the force of the spring 83 when the hook-shaped sliding member 53 engages the side portion 45 of the auxiliary chock 4.

Next, when the upper carriage 6 is raised by driving the jack 66, since the hooks 7 and 71 are engaged, the lower carriage 6'also rises. Each engaging lever 8 is formed with a notch 84 that engages with the groove 37 of the rod 36 by the action of the spring 83 when the corresponding hook-shaped sliding member 53 is raised and the engaging lever 8 is released. There is. In this state, the work rolls 2, 2'are rigidly locked by the auxiliary chocks 4, 4'and the corresponding chocks 3, 3'by the rods 36 for axial translation. Therefore, the two work rolls 2, 2 ', together with their chocks, can be removed from the stand.

By performing the reverse operation to the above, a new work roll pair having the chock 3 and the auxiliary chock 4 axially rigidly locked by the engaging lever 8 and the rod 36 can be introduced into the stand. . After the rolls are in place, the four carriages 6,6 'can be lowered simultaneously to engage the corresponding hook-shaped sliding members 53 with the ends 45 of the auxiliary chocks 4,4'. As a result, the arm 82 of the engagement lever 8 is pushed back to the rear, so that the engagement lever 8 is automatically released. After that, each work roll 2, 2'can be adjusted independently. After removing the work rolls 2 and 2 ', in order to remove the upper backup roll 20, the four carriages 6,
6'can be lowered back to the down position.

The invention is not limited to the embodiments described above, but may be of a similar construction without departing from the spirit of the claims. In particular, although the present invention has been described with respect to axial movement of work rolls in a quadruple rolling mill, the same arrangement can be used with any type of rolling mill and other roll machines,
For example, it can be used as a backup roll or an intermediate roll of a six-fold rolling mill. The reference numerals described in the claims are for facilitating understanding and do not limit the scope of the present invention.

[Brief description of drawings]

1 is a cross-sectional view of a rolling stand equipped with the device of the present invention, the left half represents the minimum roll gap and the right half represents the maximum roll gap.

FIG. 2 is a vertical cross-sectional view in which all rolls are cut along a pressure surface.

3 is a detailed horizontal sectional view of the axial movement device taken along the line AA in FIG.

FIG. 4 is a partial view of the drive element viewed in the direction of arrow F1 in FIG.

5 is an enlarged cross-sectional view taken along the line BB of FIG.

FIG. 6 is a side view of the height adjusting device as viewed in the direction of arrow F2 in FIG.

[Explanation of symbols]

1 Stand 2, 2'Work roll 3 Chock 4, 4'Chock 5 Jack for axial movement 6 Carriage 8 Engagement lever 11 Vertical member 17 Jack for bending 20, 20 'Backup roll 22 Neck 23 Roll neck 36 Rod 37 Groove 53 Hook type sliding member 67 Sensor 84 Notch

Claims (15)

[Claims] 1. A stand (1) having two vertical members (11) spaced apart from each other, at least two rolls (2, 2 ') which are vertically stacked on each other, and at least one roll.
Means to move (2) in parallel with roll axis (x, x ') (5)
And two necks (22) with each roll aligned with each other
Is the roll axis on the corresponding vertical member (11) of the stand (1)
Chock guided parallel to the pressure surface (P2) passing through (x, x ')
It is rotatably supported by each bearing (31) provided in (3),
Each neck (22) of the axially movable roll (2) is a sliding roll neck with respect to the bearing (31) of the corresponding chock (3).
Can roll axially along (23), roll (2)
The means (5) for axially moving the roller is formed at an end (at least one neck (22) of the axially movable roll (2) formed at a portion beyond the sliding roll neck (23). 24) via the drive element (4) rotatably supported by
In a rolling mill having axially movable rolls supported by 4), at least one work roll (2) is
Vertical members of the stand (1) to adjust the spacing between the 2 ')
Means for axial movement of this roll (2) with variable height, which can be moved in parallel along (11)
(5) is removably connected to the drive element (4) of this roll (2) and is mounted on the carriage (6), the carriage (6) moving between the retracted position and the driven position. It is possible to slide along the vertical member (11) of the stand (1) in parallel with the pressure surface (P2) and to adjust the height up to the height of the roll (2) which is movable in the axial direction. Characteristic rolling machine. 2. At least one means (5) for axially moving the roll (2), which is at least adjustable in height.
Has two hydraulic jacks (5), the body of which is fixed to a carriage (6) sliding along a vertical member (11) of the stand (1), the piston rod (52) of which is A means (53) for releasably engaging a drive element (4) axially rigidly locked to a neck (22) of a roll (2) of variable height Rolling machine described. 3. Two jacks, in which at least means (5) for axially moving a roll (2) of variable height are arranged symmetrically on both sides of the pressure surface (P2) and are driven synchronously. (5a, 5b), each jack (5a, 5b) is mounted on two carriages (6a, 6b) that can move synchronously, and the carriages (6a, 6b) are mounted on the roll (2). Axis
Rolling according to claim 2, characterized in that it comprises means (53a, 53b) for releasably engaging two lateral members (45) of a drive element (4) extending symmetrically to both sides of (x'x). Machine. 4. A sensor (67) in which at least one carriage (6) represents its position and a carriage (6) with respect to the height of a roll (2) which is axially moved by an instruction from this sensor (67). Means for adjusting the position of and for axially moving the roll (2) to rotatably engage the drive element (4) axially rigidly locked to the roll (2). The rolling mill according to claim 1, further comprising means (66) for sliding the carriage (6) along the vertical member (11). 5. A drive element (4) associated with each axially driven roll (2, 2 ') is formed in an auxiliary chock (4), which neck (22). Edge of (24)
It is mounted on the neck so that it can rotate freely and can be locked in the axial direction, and the auxiliary chock (4) is a hook type that is rigidly locked to the means (5) for moving the roll (2) in the axial direction. A rolling mill according to any one of the preceding claims, comprising at least one lug (44) removably engaged with the sliding member (53). 6. A hook type sliding member (53) slides on a slider (68) provided on a corresponding carriage (6) in parallel with an axis (x'x) of a roll (2). Rolling machine described in. 7. An auxiliary chock for the hook type sliding member (53)
It has a notch (54) with which the side member (45) of the lug (44) of (4) engages, which notch (54) defines the height of the auxiliary chock (4) with respect to the carriage (6). 7. The method according to claim 5, wherein the hook-shaped sliding member (53) extends at a right angle to the axis (x'x) of the roll so as to be changeable. Rolling mill. 8. The auxiliary chock (4) has a bore (46), and the rod (36) slidable inside the bore (46) has a neck (22).
Is fixed to the chock (3) holding the roll axis
5. A rod extending parallel to (x'x), the rod (36) holding the auxiliary chock (4) without disturbing the movement of the auxiliary chock axially with the roll. 7
The rolling mill according to any one of 1. 9. Each chock holding a work roll (2)
(3) is movable by rigid locking means (8) to stand (1)
Axial locking on the corresponding vertical member (11) of the roll, removable to lock roll (2) and chock (3a, 3b) together with roll (2) in a rigid state Rolling mill according to any one of claims 5-8, having different means (18). 10. A means (8) for locking the chock (3) in a rigid state in the axial direction is constituted by an engaging lever (8) rotatably attached to the auxiliary chock (4) about a shaft (81). This engaging lever (8) is connected to the rod (3) of the auxiliary chock (4).
Has a notch (84) that can be engaged with the groove (37) formed in 6),
The notch (84) rotates the engaging lever (8) when the auxiliary chock (4) engages with the hook type sliding member (53) of the jack (5) that moves the roll (2) in the axial direction. 10. The rolling mill according to claim 9, which is adapted to be disengaged from the groove (37). 11. A backup roll (2
Carriage (6 ') with means (5') for axial movement of the work roll (2 ') when only the height of the (0') and the corresponding work roll (2 ') changes slightly ) Maintains the height of this roll (2 ') and serves as a reference for adjusting the height position of the carriage (6) of the means (5) for moving the other work roll (2) in the axial direction. The rolling mill according to claim 4, wherein 12. Carriage (6, 6 ') for removing the work rolls (2, 2') together with the chocks (3, 3 ') holding them and the auxiliary chocks (4, 4'). Carriage whose height is almost constant so that it can be moved together at the height position of the work rolls (2, 2 ') combined with
The rolling mill according to claim 11, further comprising movable means (7, 71) for locking the (6 ') on the carriage (6) whose height is adjustable in a rigid state. 13. A bending means (7, 34) is directly supported on a chock (3, 3 ') holding each work roll (2, 2'). Rolling machine described. 14. Bending means (17) for separating the chock (3, 3 ') relative to each other from two parts which abut against the chock (3, 3') holding two rolls from opposite directions. This jack (1) consists of a jack (17)
13. The adjusting range of 7) corresponds to the changing range of the gap between the two work rolls (2, 2 '), and the jack (17) is dimensioned so that a bending force can be applied. Rolling machine described in. 15. Bearings (31) supporting an axially movable roll (2) are mounted on a bush (35),
The cross section of the inner surface of the bush (35) is the same as the cross section of the sliding roll neck of the corresponding neck of the roll, except for clearance for assembly. Rolling machine.