JP2862440B2 - Roll cross device of cross roll 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 a roll crossing device of a cross roll rolling mill for crossing upper and lower work rolls or upper and lower work rolls and a backup roll.

[0002]

2. Description of the Related Art An example of a rolling mill that crosses upper and lower work rolls by raising and lowering a cam block that engages with a cross block on an inclined surface in the vertical direction is disclosed in Japanese Patent Publication No. Sho.
No. 0-29562.

In this cross roll rolling mill, as shown in FIG. 5, both cam blocks 11 and 12 mounted on the opening 2 of the housing 1 so as to be able to move up and down are hydraulic cylinder 24, balance beam 23, rod 21 and By 22, the upper cross blocks 13 and 14 and the lower cross blocks 15 and 16 are moved in opposite directions in a horizontal direction orthogonal to the roll axis direction. By this movement, the upper work roll chock 9 and the upper work roll 7 and the lower work roll chock 10 and the lower work roll 8 are rotated in opposite directions about the cross point of the upper and lower work rolls 7 and 8, so that the upper work roll 7 and the lower work roll 7 are rotated. The lower work roll 8 is crossed with the lower work roll 8 so that the roll gap g at both ends thereof is made larger than that at the center as shown in FIG. In addition,
In the figure, reference numerals 3 and 4 denote upper and lower backup rolls, and reference numerals 5 and 6 denote upper and lower backup roll chocks.

[0004]

However, in the conventional apparatus, when the number of times of use thereof increases, both side surfaces of the upper and lower work roll chocks 9, 10 and the upper and lower cross blocks 13, 1 are increased.
When the upper and lower work rolls 7 and 8 and the upper and lower work roll chocks 9 and 10 are set in the housing 1, the upper work roll 7 and the lower work roll 8 , Or play occurs due to a gap in any of the engagement surfaces.

In such a state, the upper and lower work rolls 7,
In the case where 8 is crossed, as shown in FIG.
The cross point O becomes O₁Go to work on
The both ends of the rule 7 also move as shown by the broken lines, and
The roll gap g is g₁, G _TwoIs uneven, like
A sheet wedge is generated in the sheet width direction of the rolled material 25.

If there is play on the engagement surface, the upper and lower work rolls 7 and 8 or either of them vibrate in the rolling direction during rolling, and the thickness of the rolled material 25 in the sheet width direction changes to reduce the rolling. Since the inner plate bends and meanders are induced, not only the quality of the rolled material 25 becomes poor, but also the plateability decreases, and normal rolling operation may become impossible.

Therefore, an object of the present invention is to make it possible to adjust the horizontal position orthogonal to the roll axis direction of the upper and lower cross blocks engaging with the vertical gradient surfaces of the upper and lower cam blocks by a simple means. An object of the present invention is to eliminate work roll displacement and play of the engaging portion.

[0008]

In order to achieve the above object, the present invention is directed to an upper cross block which moves up and down a cam block which engages with an upper cross block and a lower cross block on a vertically inclined surface. And the lower cross block are moved in opposite directions in the horizontal direction orthogonal to the roll axis direction, and the upper roll chock and the upper roll and the lower roll chock and the lower roll are rotated in opposite directions to cross the upper and lower rolls. In a roll rolling mill, an upper cam block that engages with the inclined surface of the upper cross block, and is connected to the upper cam block so as to form a sloping gap in the horizontal direction, and engages with the inclined surface of the lower cross block. Adjust the lower cam block, the wedge spacer inserted in the above-mentioned gradient gap, and the horizontal position of this wedge spacer. Characterized by comprising providing a that means.

[0009]

The horizontal gap formed between the upper cam block and the lower cam block is enlarged or reduced by inserting and removing a wedge spacer to adjust the vertical relative distance between the upper cam block and the lower cam block. . By adjusting the relative distance in the vertical direction, the relative position in the horizontal direction orthogonal to the roll axis direction of the upper cross block and the lower cross block engaged with the inclined surface of the upper and lower cam blocks is adjusted. By adjusting the relative position in the horizontal direction, the horizontal play of the upper and lower roll chock is eliminated, and the horizontal position of the upper roll chock and / or the lower roll chock is adjusted to eliminate the horizontal displacement of the upper and lower roll chock. Therefore, the plate shape in the width direction of the rolled material is improved, and plate bending and meandering are prevented.

[0010]

An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a front view of a cam block elevating type work roll cloth rolling mill according to the present invention, in which a main part is cut away.
3 is a cross-sectional view taken along the line II-II of FIG. 1, FIG. 3 is a cutaway front view showing an enlarged main part of FIG. 1, and FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG.

In the upper figure, 7 is an upper work roll, 8 is a lower work roll, and upper and lower work rolls 9 and 9 are provided.
10 are the same as in FIG. 5 showing a conventional example. Reference numerals 13 and 14 denote upper cross blocks, and reference numerals 15 and 16 denote lower cross blocks. The lower cross blocks are mounted on a housing 31 so as to be movable in a horizontal direction orthogonal to the roll axis direction. The upper and lower work roll chocks 9 and 10 are sandwiched between the upper and lower cross blocks 14 and 16 on the delivery side B as in FIG.

Reference numerals 32 and 33 denote upper cam blocks which are connected to screw jacks 38 and 39 via rods 36 and 37, respectively.
Motors 40 and 41 are mounted on 9 respectively. 3
Reference numerals 4 and 35 denote lower cam blocks, which are connected to the upper cam blocks 32 and 33 so as to form inclined upper gaps 50 and 51 and lower gaps 52 and 53, respectively. In each of the upper gaps 50 and 51 and the lower gaps 52 and 53,
The upper wedge spacers 42 and 43 and the lower wedge spacers 44 and 45 are fitted respectively, and the upper adjustment bolt 4
6, 47 and lower adjust bolts 48, 49, respectively. 31a and 31b are square holes formed on the entrance side A and the exit side B of the housing 31.

3 is an upper backup roll, 4 is a lower backup roll, and are supported by upper and lower backup roll chocks 5, 6, respectively.
Is the same as

Next, the operation of the present apparatus will be described. Housing 31, upper and lower cam blocks 32, 33, 3
4, 35, each upper and lower cross block 13, 14, 1
When the sliding parts such as 5 and 16 are worn and play occurs, the upper cam blocks 32 and 33 are screwed to the screw jacks 38 and 39.
The upper adjusting bolts 46 and 47 are loosened from the square holes 31a and 31b, and the upper wedge spacers 42 and 43 are pulled out by a required size. Push in 44 and 45 by the required size, lower cam block 3
The upper and lower cam blocks 32 on the entry side A
The clearance between the inclined portion 34 and the inclined portions of the upper and lower cam blocks 33 and 35 on the delivery side B is reduced to eliminate the play.

For example, the upper work roll chock 9
When the axis C ₇ of the upper work roll 7 is displaced from the center C of the rolling mill or the axis C ₈ of the lower work roll 8 when the side surface of the delivery side B is unevenly worn on the housing 31 and the entry side A
Of each of the lower adjusting bolts 48 is pulled out to pull out the respective lower wedge spacers 44 by a required size, and the respective upper adjusting bolts 46 are tightened to form the upper wedge spacers 42.
Into the required size, and the lower cam block 34
And then the upper and lower cam blocks 32 and 34 are raised by the screw jack 38, and the upper and lower cam blocks 33 and 35 on the delivery side B are screwed up by the screw jack 3.
9 to move the upper cross block 14 to the entry side A, and then move the lower cam block 35 to the same
The upper and lower adjustment bolts 47 and 49 and the upper and lower wedge spacers 43 and 45 are raised by operation to eliminate the displacement.

When the positions of the upper and lower work rolls 7 and 8 are corrected or the backlash is eliminated in this manner, the positions are rotated as the origin of the rotation angles of the motors 40 and 41, and both screw jacks 38 and 39 rotate. Rod 3
Upper and lower cam blocks 32, 34 on the entry side A via the ports 6, 37
And the upper and lower cam blocks 33, 35 on the delivery side B are moved up and down in opposite directions to each other, and the upper and lower cross blocks 13, 1
Work roll chock 9 through 4, 15, 16
10 and the upper and lower work rolls 7 and 8 are rotated around the cross point 0 in opposite directions at a required cross angle θ, respectively.
The rolled material 25 is rolled by crossing the upper and lower work rolls 7 and 8.

Incidentally, as a means for adjusting the horizontal position of the spacer of the present invention, an actuator such as a hydraulic cylinder may be used instead of the adjustment bolt. The roll cloth device of the present invention can be applied not only to a work roll cloth rolling mill but also to a pair cloth rolling mill in which upper and lower work rolls and a backup roll are crossed in pairs.

[0018]

According to the present invention, the upper cam block and the lower cam block are connected to each other by forming a sloping gap in the horizontal direction, and this gap is enlarged and reduced by inserting and removing a wedge spacer. By adjusting the relative distance between the upper and lower cross blocks, the horizontal position orthogonal to the roll axis direction of the upper cross block and the lower cross block that engages with the vertically inclined surface of the upper cam block and the lower cam block can be adjusted. Therefore, the displacement of the upper and lower work rolls and the play of the engagement surface can be eliminated by a simple structural change. Accordingly, it is possible to prevent the sheet wedge of the rolled material and the bending and meandering of the rolled material during rolling, thereby improving the quality and rolling operability of the rolled material.

[Brief description of the drawings]

FIG. 1 is a fragmentary front view of a main part of a work roll cloth rolling mill according to an embodiment of the present invention.

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

FIG. 3 is an enlarged view of a main part of FIG. 1;

FIG. 4 is a sectional view taken along line IV-IV of FIG. 3;

FIG. 5 is a front view of a conventional example.

FIG. 6 is an explanatory diagram showing a phenomenon caused by a work roll cloth.

[Explanation of symbols]

 7 Upper work roll 8 Lower work roll 9 Upper work roll chock 10 Lower work roll chock 13,14 Upper cross block 15,16 Lower cross block 25 Rolled material 31 Housing 32,33 Upper cam block 34,35 Lower cam block 42,43 Upper wedge Spacers 44, 45 Lower wedge spacers 46, 47 Upper adjustment bolts 48, 49 Lower adjustment bolts 50, 51 Upper gap 52, 53 Lower gap

Claims (1)

(57) [Claims] 1. A cam block which engages with an upper cross block and a lower cross block on an inclined surface in a vertical direction is moved up and down to move the upper cross block and the lower cross block in mutually opposite horizontal directions orthogonal to the roll axis direction. Move to
In a cross roll rolling mill in which an upper roll chock and an upper roll and a lower roll chock and a lower roll rotate in opposite directions to cross the upper and lower rolls, an upper cam block that engages with a slope of the upper cross block, A lower cam block connected to the upper cam block so as to form a gradient gap in the horizontal direction and engaging with the gradient surface of the lower cross block; a wedge spacer inserted into the gradient gap; Means for adjusting the horizontal position of the roll-rolling mill.