JPH0760310A - Rolling mill - Google Patents

Abstract

PURPOSE:To provide the plate shape controller of a strip material, in which a shift device on a rolling mill work side, is miniaturized in a rolling mill mak ing only an upper and a lower work rolls or, the upper and the lower work rolls and a backup roll cross each other, moreover shifting the upper and the lower work rolls in the opposite direction each other in the roll axial direction. CONSTITUTION:A thrust receiving block 4 is slidably held by respective stoppers 6 and a projecting part 2a, and an upper and a lower work rolls 51 and 52 are allowed to cross each other with a specific cross angle theta by respective hydraulic cylinder 61 and a cross head 60. And, both of an upper and a lower holding blocks 2 and a stopper 6, are allowed to move in the roll axial direction in the opposite direction each other in the upper and the lower by respective hydraulic cylinder blocks 1. The upper and the lower work rolls 51 and 52 are shifted in the opposite direction each other through a thrust receiving block 4, a bracket 3 and a roll chock 53. A steel strip 50 is rolled by setting an upper and a lower tapered parts 51a to both edge parts of the steel strip 50, its plate crown is controlled, and an edge drop is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling mill in which only upper and lower work rolls or upper and lower work rolls and a backup roll are crossed with each other, and the upper and lower work rolls are shifted in opposite directions in the axial direction of the roll.

[0002]

2. Description of the Related Art FIG. 4 is a side view showing an essential part of a working side of an example of a conventional roll cross shift mill, and FIG.
It is a top view showing a V section.

In FIGS. 4 and 5, reference numeral 51 is an upper work roll, and a taper portion 51a is provided on the working side thereof, and the end portions on the working side and the driving side (not shown) are housed in the housing 7.
It is pivotally attached to the upper roll chock 53 in 0.

A lower work roll 52 is provided with a taper portion (not shown) on the drive side (not shown), and ends of the work side and the drive side (not shown) are axially attached to the lower roll chock 53 in the housing 70. There is.

Brackets 54 are fixed to the upper and lower roll chocks 53 on the working side on the inlet side and the outlet side of the strip steel 50, respectively.

Reference numeral 55 denotes a holding block which is fitted between upper and lower frames 56 fixedly provided on the inlet side and the outlet side of the working side housing 70 so as to move in the roll axis direction, and a thrust receiving block 58. The thrust receiving bar 57 pivotally attached to the tip end is fitted through so as to move in the horizontal direction orthogonal to the roll axis direction.

A hydraulic cylinder 59 is mounted between the upper and lower frames 56, and the rod portion thereof has a holding block 55.
Are linked to. Reference numeral 60 denotes a crosshead, which is fitted into the housing 70 so as to contact the upper and lower roll chocks 53 by the hydraulic cylinder 61 and move in the horizontal direction orthogonal to the roll axis direction. 62 is a backup roll.

Next, the operation will be described. Each thrust receiving bar 57 is moved to move the slide block 5.
8 is inserted into the notch of the bracket 54, the upper and lower work rolls 51 and 52 are crossed with each other by the respective hydraulic cylinder 61 and the cross head 60 at a required cross angle θ, and each upper and lower work rolls are held by the respective hydraulic cylinder 59. The block 55, the thrust receiving bar 57, and the thrust receiving block 58 are moved up and down in the roll axial directions opposite to each other, and the bracket 54 and the roll chock 53 are moved.
The upper and lower work rolls 51, 52 are shifted in opposite directions via the rolls, the upper taper portion 51a and the lower taper portion (not shown) are set on both edge portions of the steel strip 50, and the steel strip 50 is rolled. It controls and also prevents edge drop.

[0009]

By the way, in the conventional apparatus as described above, since the hydraulic cylinder 59 having a stroke required for the roll shift length is mounted on the outer side of the holding block 55 on the working side, Since the equipment overhang length in the roll axis direction is long, the scale of the shift device on the working side of the rolling mill becomes large, resulting in a problem that a large installation space is required.

Further, the hydraulic cylinder 5 is attached to the long frame 56.
Since No. 9 is installed, there is a problem that the thrust rigidity is low, the roll shift amount setting accuracy is low, and the plate shape accuracy of the strip steel 50 is low.

An object of the present invention is to provide a new rolling mill which solves the above-mentioned problems.

[0012]

As a structure for achieving the above object, a rolling mill according to the present invention is a roll shift means for moving upper and lower work rolls and roll chock thereof in mutually opposite directions in a roll axial direction in a housing. And a roll crossing means for crossing the upper and lower work rolls only or the upper and lower work rolls and the upper and lower backup rolls with each other, a thrust receiver provided on the strip material inlet side and outlet side of the upper and lower work roll chocks. A member, a thrust receiving member for holding each of the thrust receiving members movably in the roll cross direction, and a chock holding block provided so as to move in the roll axial direction together with the upper and lower work roll chocks and the work rolls, and an interior of the chock holding block And a chock holding block moving means It is characterized in that was.

Further, the roll shift means for moving the upper and lower work rolls and the roll chock thereof in the housing in opposite directions to each other in the housing, and the upper and lower work rolls alone or the upper and lower work rolls and the upper and lower backup rolls cross each other. In a rolling mill provided with roll cross means for rotating, the levers rotatably pivotally attached to the strip material input side and the strip output side of the upper and lower work roll chocks and connected by links, and the levers in the roll axial direction. A thrust receiving roller having a spherical outer surface rotatably attached to a shaft and a chock holding block provided to hold each thrust receiving roller and move in the roll axial direction together with the upper and lower work roll chocks and the work rolls. And the chock holding inside this chock holding block It is also effective configured to and a locking movement means.

[0014]

According to the rolling mill of the first aspect of the present invention configured as described above, only the upper and lower work rolls or the upper and lower backup rolls and the work rolls are crossed at a required cross angle by the roll crossing means, and the chock holding block is moved. The upper and lower chock holding blocks are moved in mutually opposite directions in the roll axial direction by the means, and the upper and lower work rolls are shifted in opposite directions via the work roll chock to control the plate shape of the strip.

At this time, each chock holding block is
The thrust force acting on the upper and lower work rolls is supported via the thrust receiving member.

If the cross angle is changed during the rolling of the strip, the thrust receiving member moves in the roll cross direction and slides on the chock holding block.

Further, in the rolling mill according to the second aspect, only the upper and lower work rolls or the upper and lower backup rolls and the work rolls are crossed by the roll crossing means, and the upper and lower chock holding blocks are moved in the roll axial direction by the chock holding block moving means. , And the upper and lower work rolls are shifted in opposite directions via the thrust receiving roller, the lever, and the work roll chock to control the plate shape of the strip.

At this time, each of the chock holding blocks supports the thrust force acting on the upper and lower work rolls via the thrust receiving roller.

Further, when the cross angle is changed, the pivot angles of the upper and lower work roll chocks and the lever and the lever and the link are automatically changed to change the positions of the thrust receiving rollers on the strip material input side and the strip output side in the roll axial direction. Since it is kept constant, it is not necessary to move the chock holding block in the roll axial direction, and the spherical outer surface of the thrust receiving roller absorbs the change in angle between the chock holding block and the thrust receiving roller shaft center.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will now be described with reference to the drawings. FIG. 1 is a first embodiment of the present invention.
It is a top view showing the one side section of the work side important section of a shift rolling mill.

The same members as those of the conventional apparatus are designated by the same reference numerals, and the duplicated description will be omitted.

In FIG. 1, reference numeral 1 denotes a hydraulic cylinder block, which is fixed above and below the inlet side and the outlet side of the strip steel 50 of the housing 70 on the working side, and the holding blocks 2 are provided on the outside thereof in the roll axial direction. The rod end is fixed to the inside of each holding block 2.

Reference numeral 4 denotes a thrust receiving block, which is a bracket 3 fixed to the upper and lower roll chocks 53 on the working side.
Is rotatably and pivotally attached to the entrance side and the exit side.

Each holding block 2 has a stopper 6
The protrusions 2a and the stoppers 6 are fitted so as to penetrate therethrough so as to move in the horizontal direction orthogonal to the roll axis direction.
The thrust receiving block 4 is sandwiched between and the roll chock 53 is held via the bracket 3.

Next, the operation will be described. The thrust receiving block 4 is composed of the stoppers 6 and the protrusions 2a.
Is slidably held, the upper and lower work rolls 51 and 52 are crossed with each other by a hydraulic cylinder 61 and a cross head 60 at a required cross angle θ, and each hydraulic cylinder lock 1 holds both upper and lower holding blocks 2 And the stopper 6 are moved up and down in the roll axis directions which are opposite to each other, and the thrust receiving block 4 and the bracket 3
And the upper and lower work rolls 5 via the roll chock 53
1, 52 are shifted in the opposite directions, and the upper taper portion 51
a and a lower taper portion (not shown) are set on both edge portions of the strip steel 50 to roll the strip steel 50 to control the plate crown and prevent edge drop.

At this time, the protrusion 2a and the stopper 6 of each holding block 2 support the thrust force acting on the upper work roll 51 and the lower work roll 52 via the thrust receiving block 4.

When the cross angle θ is changed during the rolling of the strip steel 50, the thrust receiving block 4 slides on the protrusion 2a or the stopper 6. Each time the cross angle θ is changed, the hydraulic cylinder block 1 is operated in synchronization with the hydraulic cylinder 61 to roll each holding block 2 by the amount of axial movement of the thrust receiving block 4 on the inlet side and the outlet side. Move in the axial direction.

Although the thrust receiving block 4 is provided as the thrust receiving member in the present embodiment, a thrust receiving roller which rotates in the same direction may be provided instead.

Next, another embodiment of the present invention will be described with reference to FIG. FIG. 2 is a plan view showing a one-side cross section of a main part on the working side of a roll cloth shift mill, which is a second embodiment of the present invention.

In FIG. 2, reference numeral 11 denotes a bearing block, which is fixed on the upper and lower sides of the housing 70 on the inlet side and the outlet side, respectively, and holding blocks 12 are fitted on the outer sides thereof, and nuts whose outer circumferences are worm gears. 14 is rotatably installed. A worm gear (not shown) rotated by the hydraulic motor 17 is meshed with the worm gear of the nut 14. A screw shaft 15 that is screwed into a nut 14 is fixed inside the holding block 12. Further, the holding block 12 has a stopper 16
Are so fitted as to penetrate therethrough so as to move in the horizontal direction orthogonal to the roll axis direction.

Reference numeral 18 denotes a lever, which is rotatably pivotally attached to brackets 13 fixed to the entrance and exit sides of the upper and lower roll chocks 53, and has a thrust receiving roller 19 having a spherical outer surface on its shaft portion 18a. It is rotatably and axially movably attached. The upper and lower levers 18 and 18
Are linked by links 20 which are pivotally attached to each other.

Each thrust receiving roller 19 is loosely fitted between the protruding portion 12a of the holding block 12 and the stopper 16 protruding from the holding block 12.

Next, the operation of the apparatus of this embodiment will be explained. The upper and lower work rolls 51, 52 are moved by the respective hydraulic cylinders 61 and the cross heads 60 to obtain a required cross angle θ.
And cross each other, and each holding block 12
The nut 14 in the inside is rotated in the opposite direction up and down by a hydraulic motor 17 and a worm (not shown), and the screw shaft 15, the holding block 12 and the stopper 16 are moved up and down in mutually opposite directions in the roll axis direction, respectively. The upper and lower work rolls 51 are shifted in opposite directions via the thrust receiving roller 19, the lever 18, the bracket 13 and the roll chock 52, and the upper taper portion 51a is formed.
And the lower taper part which is not shown in figure is set to both edge parts of the steel strip 50, the steel strip 50 is rolled, the plate crown is controlled, and an edge drop is prevented.

At this time, the projecting portion 12a and the stopper 16 of each holding block 12 have the thrust receiving roller 19
The thrust force acting on the upper work roll 51 and the lower work roll 52 is supported via the.

When the cross angle θ is changed during the rolling of the strip steel 50, the thrust receiving roller 19 is moved to each holding block 1
The shaft portion 18a does not move in the axial direction by coming into contact with either the second protruding portion 12a or the stopper 16 and moves.

When the upper and lower work rolls 51 and 52 are crossed or the cross angle θ is changed, the pivot angle of the lever 18 and the link 20 is automatically changed to roll the thrust receiving rollers 19 on the person side and the exit side. Since the position in the axial direction is fixed, it is not necessary to move the holding block 12 in the roll axial direction, and the spherical outer surface of the thrust receiving roller 19 absorbs the change in the angle between the holding block 12 and the axial center of the thrust receiving roller 19. .

Further, another embodiment of the present invention will be described. 3 is a third embodiment of the present invention, a roll cloth
FIG. 6 is a plan view showing a one-side cross section of a main part on a working side of a shift rolling machine, and only a roll shift device is different from the second embodiment described above.

In FIG. 3, reference numeral 21 denotes a nut block, which is fixedly installed on the upper and lower sides of the housing 70 on the inlet side and the outlet side, and the holding blocks 22 are fitted on the outside thereof so as to move in the roll axis direction. The nut 14 is fixed inside. Inside the holding block 22, a worm gear 29 is fitted and a screw shaft 25 whose screw portion is screwed into a nut 24 is rotatably attached.

A worm (not shown) rotated by the hydraulic motor 27 is meshed with the worm gear 29.

Further, the holding block 22 has a stopper 26.
Of the thrust receiving roller 1 by moving in the horizontal direction orthogonal to the roll axis direction and the protrusion 22a of the holding block 22.
The roll chock 52 is fitted through and fitted to the roll chock 52 via the lever 9, the lever 18, and the bracket 13.

The operation of the apparatus of this embodiment will be described.
The upper and lower work rolls 51 and 52 are connected to the respective hydraulic cylinders 61.
And the cross head 60 cross each other at a required cross angle θ, and the worm gear 29 and the screw shaft 25 in each holding block 22 are rotated in the opposite directions up and down by the hydraulic motor 27 and a worm (not shown). 22 and the stopper 26 are respectively moved up and down in directions opposite to each other in the roll axis direction,
The upper and lower work rolls 51, 52 are shifted in mutually opposite directions via the thrust receiving roller 19, the lever 18, the bracket 13, and the roll chock 52, and the upper taper portion 51a and the lower taper portion (not shown) are formed on both edges of the strip steel 50. The strip steel 50 is set in the section and the strip steel 50 is rolled to control the plate crown and prevent edge drop.

At this time, the protrusions 22a and the stoppers 26 of the respective holding blocks 22 have the thrust receiving rollers 19
The thrust force acting on the upper work roll 51 and the lower work roll 52 is supported via the.

When the cross angle θ is changed, the lever 18,
The action of the thrust receiving roller 19 and the link 20 is the second
Same as the embodiment.

In each of the above-mentioned embodiments, the rolling mill that crosses only the work rolls has been described, but the present invention can also be applied to a rolling mill that crosses the work rolls and the backup rolls.

[0045]

As described above, the rolling mill of the present invention has the following effects. (1) In the invention according to claim (1), since the roll axial direction moving means is incorporated in the chock holding block, the device overhang length in the roll axial direction is shortened.
Since the scale of the shift device on the working side of the rolling mill becomes smaller, the installation space can be reduced.

(2) In the invention described in claim (2), a lever which is pivotally attached to the upper and lower work roll chock on the strip material inlet side and the strip material outlet side and connected by a link, and the lever is freely movable in the roll axial direction. A thrust receiving roller that is axially mounted to rotate, a chock holding block that holds each thrust receiving roller and moves along the work roll chocks and work rolls in the roll axial direction, and this chock holding block. By providing the roll axial direction moving means installed internally, in addition to the effect of the above item (1), even if the cross angle of the upper and lower work rolls is changed, the pivot angles of the work roll chock and the lever and the lever and the link are changed. Since it automatically changes to keep the position of the thrust receiving roller on the input side and the output side of the strip material in the roll axial direction constant,
It is not necessary to move the chock holding block in the roll axis direction, and the change in the angle between the chock holding block and the thrust receiving roller shaft center can be absorbed by the spherical outer surface of the thrust receiving roller.

[Brief description of drawings]

FIG. 1 is a plan view showing a one-side cross section of a main part on a working side of a roll cloth shift mill according to a first embodiment of the present invention.

FIG. 2 is a one side cutaway plan view showing a second embodiment of the present invention.

FIG. 3 is a plan view of one side cutaway showing a third embodiment of the present invention.

FIG. 4 is a side view showing a main part on a working side of an example of a conventional roll cross shift mill.

5 is a plan view showing a VV cross section of FIG. 4. FIG.

[Explanation of symbols]

 1 Hydraulic Cylinder Block 2, 12, 22 Holding Block 11 Bearing Block 15, 25 Nut 16, 26 Screw Shaft 17, 27 Hydraulic Motor 21 Nut Block 25 Nut 29 Worm Gear 51 Upper Work Roll 52 Lower Work Roll 53 Roll Chock 60 Crosshead 61 Hydraulic Cylinder 70 housing

Claims (2)

[Claims] 1. A roll shift means for moving upper and lower work rolls and roll chock thereof in mutually opposite directions in a housing, and upper and lower work rolls alone or upper and lower work rolls and upper and lower backup rolls cross each other. In a rolling mill equipped with roll cross means for controlling the thrust receiving members provided on the strip material input side and output side of the upper and lower work roll chocks, and holding the thrust receiving members movably in the roll cross direction. A rolling mill comprising: the upper and lower work roll chocks; and a chock holding block provided so as to move in the roll axial direction together with the work rolls, and a chock holding block moving means installed in the chock holding block. 2. The upper and lower work rolls and roll shift means for moving the roll chock in the housing in opposite directions of the roll axis, and the upper and lower work rolls alone or the upper and lower work rolls and the upper and lower backup rolls cross each other. In a rolling mill equipped with roll crossing means for rotating the work roll chock, the levers are rotatably pivotally attached to the strip material entrance side and the strip material exit side of the upper and lower work roll chocks, and are linked by links, and the shaft center of each lever is rolled. Thrust receiving rollers whose outer surface is spherically mounted so as to freely rotate in the horizontal direction orthogonal to the axial direction, and each thrust receiving roller are held and moved in the roll axial direction together with the work roll chock and work rolls above and below. To this chock holding block and the chock holding block A rolling mill equipped with a chock holding block moving means installed therein.