JPH09285805A - Cross roll rolling mill - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the working rate of an equipment enhance, and also the make upper and lower work rolls cross each other by a small driving power. SOLUTION: This rolling mill is constituted by moving an upper cross head 1 and a lower cross head 2 in the opposite directions each other, which are perpendicular to a roll axial direction, by turning upper and lower roll chocks 55 and 56 in the opposite directions each other, and by making upper and lower rolls 51 and 52 cross each other. In this case, a recessed spherical liner 5 is provided at the tip part of each cross head, and also both side surfaces of each roll chock are formed to planes, and a sliding surface to the recessed spherical liner 5 is formed to a convex sphere with almost the same radius as that of the recessed sphere. And also, at least one spherical liner 3 whose sliding surfaces to both side surfaces of the roll chock are formed to planes, is freely slidably mounted on the plane parts on both sides of each roll chock and at the tip part of the cross head each.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work roll cross rolling machine that crosses upper and lower work rolls to roll a plate material, or a roll cross of a pair cross roll rolling machine that crosses upper and lower work rolls and a backup roll to roll a plate material. Regarding technology.

[0002]

2. Description of the Related Art FIG. 9 is a partially cutaway side view showing an example of a conventional work roll cloth rolling machine, and FIG.
It is a line sectional view.

In the figure, 51 is an upper work roll and 52 is an upper work roll.
Is a lower work roll, and both ends thereof are supported by upper and lower work roll chocks 55 and 56, respectively, and are housed in a housing 60. 53 and 54 are upper and lower backup rolls, and 57 and 58 are upper and lower backup roll chock.

Numeral 61 denotes an upper crosshead, and numeral 62 denotes a lower crosshead, and upper and lower work roll chocks 55 and 56 are respectively provided with upper and lower curved liners 63 and 64 at their leading ends in contact with both side surfaces. The motors 71 and 74, the miter gears 72 and 75, and the shaft 73,
Upper and lower screw jacks 6 operated by rotation of 76
The housing 60 is slid by the upper and lower rods 67 and 68 in the direction orthogonal to the roll axis direction.
It is fitted in. 59 is a roll bending cylinder.

When the plate material 50 is rolled, the upper cross head 61 and the lower cross head 62 are moved in opposite directions by the upper and lower screw jacks 65 and 66, and the upper work roll chock 55 and the lower work roll chock 56 are moved.
And is rotated about a cross point O shown in FIG. 10 so that the upper and lower work rolls 51 and 52 are crossed from the rolling mill center C at a required cross angle θ, and the roll gaps at both ends thereof are made larger than the central portion. The plate crown of the plate member 50 is prevented from being generated.

During rolling of the plate material 50, the upper and lower crossheads 6
1 and 62 are finely moved in opposite directions to each other so that the cross angle θ
Is adjusted, and the plate shape of the plate material 50 is controlled in combination with the bending of the upper and lower work rolls 51 and 52 by the roll bending cylinder 59.

[0007]

However, in the conventional apparatus, the upper and lower curved liners 63 and 64 and the flat surfaces on both sides of the upper and lower work roll chocks 55 and 56 are in line contact with each other,
High surface pressure acts. In this state, when the work rolls 51 and 52 roll in the rolling direction or slide in the roll axial direction when the work rolls 51 and 52 are crossed, abrasion or galling occurs on both side surfaces of the work roll chocks 55 and 56 and / or the curved surfaces of the upper and lower curved liners 63 and 64. Therefore, the maintenance pitch is shortened and the operating rate of the equipment is reduced.

Further, since the friction coefficient of the sliding portion tends to be large, the hysteresis in the rolling direction becomes large, and there arises a problem that a large amount of power is required to cross the upper and lower work rolls 51 and 52.

Therefore, an object of the present invention is to provide a cross roll rolling mill capable of raising the operating rate of equipment and crossing the upper and lower work rolls with a small power.

[0010]

In order to achieve the above-mentioned object, a cross roll rolling machine according to the present invention comprises: (1) a cross roll which crosses upper and lower rolls with each other by driving means for horizontally pressing a roll chock. In a rolling mill, the pressing contact portions of the roll chock and the driving means are formed by concave and convex spherical members that are matched with each other, and one of the spherical members is slidably provided on the seat surface. And

(2) The upper crosshead and the lower crosshead are moved in mutually opposite directions orthogonal to the roll axis direction,
A cross roll rolling machine for rotating upper and lower roll chocks in mutually opposite directions to cross the upper and lower rolls, wherein the tip end of each cross head is formed into a concave spherical surface and both side faces of each roll chock are formed into flat surfaces. Then, a spherical surface liner having a sliding surface with the tip end portion of the crosshead formed into a convex spherical surface having substantially the same radius as the concave spherical surface and a sliding surface with the both side surfaces of the roll chock formed into a flat surface is provided on both side surfaces of the roll chock. At least one member is slidably interposed between the portion and the concave spherical surface of the crosshead tip.

(3) The upper crosshead and the lower crosshead are moved in mutually opposite directions orthogonal to the roll axis direction,
A cross roll rolling machine for rotating upper and lower roll chocks in mutually opposite directions to cross the upper and lower rolls, wherein concave spherical surfaces are formed on both side surfaces of each of the roll chocks, and tip portions of the respective cross heads are formed into a flat surface. Then, a spherical liner having sliding surfaces with both side surfaces of the roll chock formed on a convex spherical surface having substantially the same radius as the concave spherical surface and a sliding surface with a tip end portion of the crosshead formed on a flat surface is provided on each of the roll chock concave surfaces on both sides. At least one piece is slidably interposed between the spherical surface portion and the cross head tip flat surface portion.

[Operation] According to the configuration of (1), the upper and lower roll chocks are rotated in opposite directions via the spherical member having the projections and depressions interposed in the pressing contact portion with the driving means, and the upper and lower rolls are crossed as required. The plate material is rolled by crossing at the corners so that the roll gaps at both ends of the upper and lower rolls are made larger than at the central part, and the plate shape is improved. While the cross angle of the upper and lower rolls is changing, the spherical contact portion between the spherical members slides in an arc shape in the roll axial direction, and slides in the roll axial direction on the seat surface portion of either one of the spherical members. Further, since the seat surface portion slides in the vertical direction with respect to the rolling direction, wear of each sliding portion is reduced and galling is prevented.

According to the structure (2), the upper and lower crossheads are moved in opposite directions, and the concave and spherical crossheads rotate the upper and lower roll chocks in opposite directions via the spherical liner.
The upper and lower rolls are crossed at a required cross angle so that the roll gaps at both ends of the upper and lower rolls are made larger than in the central portion, and the plate material is rolled to improve the plate shape. While the cross angle of the upper and lower rolls fluctuates, the flat surface of each spherical liner slides in the roll axial direction with the flat surfaces on both sides of the upper and lower roll chock, and the convex spherical surface moves in the concave spherical surface and roll axial direction at the tip of each crosshead. Slide in an arc. Further, since the flat surface portion of each spherical liner slides in the vertical direction with the flat surface portions on both sides of the upper and lower roll chock in the rolling direction, wear of each sliding portion is reduced and galling is prevented.

According to the structure of (3), the flat surface portion of each spherical liner slides in the roll axial direction with the flat surface portion of the tip of the upper and lower crossheads while the cross angle of the upper and lower rolls changes, and the convex spherical surface portions respectively. The roll chock slides in an arc shape along the concave spherical portions on both side surfaces in the roll axial direction. Further, since the flat surface portion of each spherical liner slides vertically with respect to the flat surface portion of the upper and lower crosshead tips in the rolling-down direction, wear of each sliding portion is reduced and galling is prevented.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a cross roll rolling mill according to the present invention will be described in detail based on Examples. In the drawings used in each of the embodiments, the same members and parts as those of the conventional device are designated by the same reference numerals, and duplicated description will be omitted.

[First Embodiment] FIG. 1 is a partially cutaway side view of a work roll cross rolling mill showing a first embodiment of the present invention, and FIG. 2 is a sectional view taken along line II-II of FIG.

In FIGS. 1 and 2, reference numeral 1 is an upper crosshead, 2 is a lower crosshead, and concave spherical liners 5 are fastened to the tips thereof, and the upper and lower screw jacks 65 and 66 move the inside of the housing 60. Slide. Reference numeral 3 denotes a spherical liner, and a surface of the concave spherical liner 5 that slides on the concave spherical surface is a convex spherical surface having substantially the same radius as the concave spherical surface, and slides on flat surfaces formed on both sides of the upper and lower work roll chocks 55, 56. The surfaces to be formed are flat and are respectively loosely attached by the roll axial stopper 6 and the vertical stopper 7 so as not to fall off from both side surfaces of the upper and lower work roll chocks 55, 56. The spherical liner 3 may be loosely attached to the upper and lower crossheads 1 and 2 by utilizing the pulling force of a spring, as in the second embodiment described later.

Due to this structure, the upper crosshead 1 and the lower crosshead 2 are moved in opposite directions,
With the concave spherical liner 5, the upper work roll chock 55 and the lower work roll chock 56 are rotated in opposite directions via the spherical liner 3, and the upper and lower work rolls 51 and 52 are crossed at a required cross angle θ to form both ends thereof. The roll gap is made larger than that in the central portion, and the plate material 50 is rolled in combination with the bending of the upper and lower work rolls 51 and 52 by the roll bending cylinder 59, and the plate shape is improved.

Cross angle θ of the upper and lower work rolls 51, 52
During the fluctuation, the flat surface portion of each spherical liner 3 slides in the roll axial direction with the flat surface portions on both sides of the upper and lower work roll chocks 55, 56, and the convex spherical surface portion has the concave spherical surface portion and the roll shaft portion of each concave spherical liner 5. Slides in a circular arc shape. Also, during the rolling down and bending of the upper and lower work rolls 51, 52,
The flat surface portion of each spherical liner 3 slides vertically with the flat surface portions on both sides of the upper and lower work roll chocks 55, 56 to reduce wear of each sliding portion and prevent galling.

[Second Embodiment] FIG. 3 is a partially cutaway side view of a work roll cross rolling mill showing a second embodiment of the present invention, and FIG. 4 is a sectional view taken along line IV-IV of FIG.

In FIGS. 3 and 4, reference numeral 15 denotes a concave spherical surface liner, which has a concave spherical surface and is fastened to both side surfaces of the upper and lower work roll chocks 55 and 56, respectively. 11
Is an upper crosshead, and 12 is a lower crosshead. Recessed flat portions 11b and 12b are formed at the tips thereof, and spring receiving holes 11a and 12a are formed in these recessed flat portions 11b and 12b. . A spring 17 is installed in each of the upper and lower spring accommodating holes 11a and 12a, and one end of the spring 17 is fastened to the bottom surface. Reference numeral 13 denotes a spherical liner, and a surface sliding on the concave spherical liner 15 is a convex spherical surface having substantially the same radius as the concave spherical surface.
The sliding surfaces of the tip end flat portions 11b and 12b of the blades 1 and 12 are formed into planes, respectively, and the adjusting bolt nut 18 adjusts the pulling force of the spring 17 so that the springs 17 and 12 do not fall off from the upper and lower crossheads 11 and 12, respectively. Has been done. Other configurations are the same as those of the first embodiment.
Note that the roll axial direction stopper 6 and the vertical direction stopper 7 may be used to prevent the spherical liner 13 from falling off the upper and lower crossheads 11 and 12, as in the first embodiment.

Due to such a constitution, the flat surface portion of each spherical liner 13 and the concave flat surface portions 11b and 12b of the upper and lower cross heads 11 and 12 and the roll shaft during the fluctuation of the cross angle θ of the upper and lower work rolls 51 and 52. Respectively, and the convex spherical surface slides in an arc shape in the roll axis direction with the concave spherical surface of each concave spherical liner 15. Also, the upper and lower work rolls 5
During the pressing and bending of 1, 52, the flat surface portion of each spherical liner 13 slides in the vertical direction with the concave flat surface portions 11b and 12b, respectively, to reduce wear of the sliding portions and prevent galling.

[Third Embodiment] FIG. 5 is a partially cutaway side view of a roll cloth device of a work roll cloth rolling mill showing a third embodiment of the present invention, and FIG. 6 is a sectional view taken along line VI-VI of FIG. Is.

In FIG. 5 and FIG. 6, the upper and lower work roll chocks 28, 29 have two vertical surfaces on both side surfaces.
An upper concave plane view 28a and a lower concave plane portion 29a are formed in the portion, and a spherical liner 23 having the same shape as that of the first embodiment is formed on the upper concave plane portion 28a and the lower concave plane portion 29a.
The upper and lower work roll chocks 28 and 29 are slidably attached by 6 so that they do not fall off from both side surfaces. A concave spherical liner 25 having two concave spherical surfaces that slide in substantially the same radius as the convex spherical surface of the spherical liner 23 is fastened to the tip ends of the upper and lower crossheads 21, 22. Other configurations are the same as those of the first embodiment. still,
The spherical liner 23 may be loosely attached to the upper and lower crossheads 21 and 22 by utilizing the pulling force of the spring, as in the fourth embodiment.

With this structure, during rolling of the plate member 50, two upper and lower side surfaces of the upper and lower work roll chocks 28, 29 which are about to rotate due to the frictional resistance of the bearings with the rotating upper and lower work rolls 51, 52 are rotated. Spherical liner 2
The upper and lower cross heads 21 and 22 support the roll bending cylinders 59 on the inlet side and the outlet side to prevent uneven load. The other actions and effects are the same as in the first embodiment.

[Fourth Embodiment] FIG. 7 is a side view in which a part of a roll cross device of a work roll cross rolling mill showing a fourth embodiment of the present invention is partially broken, and FIG. 8 is a sectional view taken along line VIII-VIII of FIG. Is.

In FIGS. 7 and 8, concave spherical liners 35 having two concave spherical portions formed in the vertical direction are fastened to both side surfaces of the upper and lower work roll chocks 55 and 56, respectively. Two concave flat portions 31b and 32b are formed in the vertical direction at the tips of the upper and lower crossheads 31 and 32, and spring receiving holes 31a and 32a are formed in the concave flat portions 31b and 32b, respectively. . Each of the springs 37 is provided inside, and one end thereof is fastened to the bottom surface. Reference numeral 33 denotes a spherical liner. The surface of the concave spherical liner 35 that slides on the concave spherical surface is formed as a convex spherical surface having substantially the same radius as the concave spherical surface, and the surface that slides on the concave flat surface portions 31b and 32b is formed as a flat surface. The adjusting bolt nut 38 adjusts the pulling force of the spring 37 so that the spring 37 is loosely attached so as not to drop from the upper and lower crossheads 31 and 32. Other configurations are the same as those of the second embodiment. The upper and lower cross heads 31, 32 of the spherical liner 33
The hold plate 36 may be used as in the case of the third embodiment to prevent it from falling off.

With this structure, during rolling of the plate member 50, two upper and lower side surfaces of the upper and lower work roll chocks 55, 56 that are about to rotate due to frictional resistance of bearings with the rotating upper and lower work rolls 51, 52 are rotated. Spherical liner 3
The upper and lower crossheads 31 and 32 support the roll bending cylinders 59 on the inlet side and the outlet side to prevent uneven load. Other functions and effects are the same as those in the second embodiment.

In each of the above embodiments, the cross drive is performed by the screw jack.
The present invention can be applied to any driving method regardless of the driving method. For example, the present invention is also effective for a hydraulically driven cross drive.

Further, the present invention can be applied to a pair cross type rolling mill in which a backup roll and a work roll are integrally crossed at the same time, and one roll end is used as a fulcrum and the other roll end is used as a plate exit side or It can also be applied to rolling mills in which upper and lower work rolls are crossed by moving them to the entry side.

[0032]

As described above, according to the present invention, the pressing contact portion between the roll chock and the driving means is formed by the spherical member having the concavo-convex shape, and one of the spherical members is mounted on the seat surface. Since it is slidably installed against,
Since the sliding area of each of the roll cloths becomes large, the sliding performance can be improved, and the friction coefficient of the sliding portion becomes small, so that the hysteresis in the rolling direction can be made small. Therefore, when the roll cloth and the roll are rolled down, the respective sliding parts slide smoothly, so that the power required for this roll cloth can be reduced to reduce the wear of the sliding part and prevent the galling. become,
The maintenance pitch can be lengthened to improve the operating rate of the equipment.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of a work roll cloth rolling mill showing a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a partially cutaway side view of a work roll cross rolling mill showing a second embodiment of the present invention.

4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is a partially cutaway side view of a roll cloth device of a work roll cloth rolling mill according to a third embodiment of the present invention.

FIG. 6 is a sectional view taken along line VI-VI of FIG.

FIG. 7 is a partially cutaway side view of a roll cloth device of a work roll cloth rolling mill according to a fourth embodiment of the present invention.

8 is a sectional view taken along line VIII-VIII of FIG.

FIG. 9 is a partially cutaway side view showing an example of a conventional work roll cloth rolling mill.

FIG. 10 is a sectional view taken along line XX of FIG. 9;

[Explanation of symbols]

1,11,21,31 Upper crosshead 2,12,22,32 Lower crosshead 3,13,23,33 Spherical liner 5,15,25,35 Concave spherical liner 6 Roll axial direction stopper 7 Vertical stopper 11b, 12b, 28a, 29a, 31b, 32b Concave flat part 17,37 Spring 18,38 Adjust bolt nut 26 Hold plate 28,55 Upper work roll chock 29,56 Lower work roll chock 50 Plate material 51 Upper work roll 52 Lower work roll

Claims (3)

[Claims] 1. A cross roll rolling machine in which upper and lower rolls are crossed with each other by driving means for pressing a roll chock in a horizontal direction, wherein a pressing contact portion between the roll chock and the driving means is formed by an uneven spherical member. A cross roll rolling machine, characterized in that, while being formed, one of the spherical members is provided slidably with respect to its seating surface. 2. A cross roll rolling machine for moving an upper crosshead and a lower crosshead in mutually opposite directions orthogonal to a roll axis direction and rotating upper and lower roll chocks in mutually opposite directions to cross the upper and lower rolls. , The tip of each of the crossheads is formed into a concave spherical surface and both side surfaces of each of the roll chocks are formed into a flat surface, and the sliding surface with the tip of the crosshead is a convex spherical surface having substantially the same radius as the concave spherical surface. And at least one spherical liner, which is formed on the flat surface of the roll chock and the concave spherical surface of the crosshead tip, is slidably interposed on each of the flat surfaces of the roll chock. A cross roll rolling machine characterized in that 3. A cross roll rolling machine for moving an upper crosshead and a lower crosshead in mutually opposite directions orthogonal to a roll axis direction and rotating upper and lower roll chocks in mutually opposite directions to cross the upper and lower rolls. , Forming a concave spherical surface on both side surfaces of each roll chock and forming a front end portion of each crosshead on a flat surface, and making a sliding surface with both side surfaces of the roll chock a convex spherical surface having substantially the same radius as the concave spherical surface. At least one spherical liner, which is formed and has a flat sliding surface with the crosshead tip portion, is slidably interposed between each of the roll chock concave spherical surfaces on both sides and the crosshead tip flat portion. A cross roll rolling machine characterized in that