JPH0715601Y2 - Rolling mill - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rolling mill, and more particularly to a structure for displacing a work roll.

2. Description of the Related Art A typical prior art is disclosed in Japanese Patent Publication No. 46-6173. In this prior art, the pair of work rolls respectively arranged at the top and the bottom are configured to be movable in the vertical and lateral directions by a complicated configuration,
Therefore, maintenance work is troublesome. Further, in this prior art, when the work roll is replaced, the work roll is supported by a spring. Therefore, when the weight of the work roll changes due to wear of the work roll or the like, the upper and lower parts of the work roll are changed. The position changes. Therefore, it is difficult to automatically change the work roll by using the roll changing device.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention An object of the present invention is to provide a rolling mill having a simple structure and capable of accurately holding a work roll at a desired predetermined position.

Means for Solving the Problems The present invention provides a pair of upper and lower work rolls each having a horizontal axis and axially opposite ends of the work rolls each having a bearing tube having an outer diameter equal to or smaller than the outer diameter of the work rolls. A pair of upper and lower bend blocks are arranged on one side of each work roll, and each bend block is a first recessed portion that supports the one side portion of the outer peripheral surface of each bearing tube. Each of the bend blocks has a supporting surface, and each bend block is guided by an upper and lower pair of shift blocks so as to be movable up and down. The bend block is provided by a first cylinder pin-connected to the upper and lower bend blocks. The shift blocks are vertically displaced toward and away from each other, and each shift block is laterally displaced by the second cylinder to form a pair of upper and lower sides on the other side of each work roll. The supporting pieces are respectively arranged, and each supporting piece has a concave second supporting surface for supporting the portion on the other side of the outer peripheral surface of each bearing tube, and each supporting piece is provided on the third cylinder. Each of the third cylinders is connected to the other end of the third cylinder opposite to the support piece so as to be swingable around a horizontal axis, and the third cylinder is a fourth cylinder pin-coupled to the upper and lower third cylinders. The rolling mill is characterized by being driven to swing.

According to the present invention, the bend block supporting the work roll is mounted on the shift block so that it can be vertically displaced by the first cylinder, and the shift block is laterally moved by the second cylinder. Since it is driven by displacement, the configuration is simple and maintenance work is easy. Further, it is possible to easily bring the position of the work roll to a desired predetermined position without depending on the weight of the work roll, and therefore, it is possible to automatically perform the work roll change work. As a result, operational efficiency is improved and mistakes in replacement work can be prevented. Further, according to the present invention, the one side portion of the outer peripheral surface of the bearing cylinder having the outer diameter equal to or smaller than the outer diameter of the work roll is supported by the first supporting surface of each bend block as described above. The other side portion of the outer peripheral surface of the bearing tube is supported by the second supporting surface of the supporting piece, and each supporting piece is movable in the lateral direction by the third cylinder. The upper and lower third cylinders are pin-connected to the fourth cylinder, and are swingably driven by the fourth cylinder around the horizontal axis of the end portion of the third cylinder opposite to the supporting piece. As a result, the work roll can be brought to a desired position by the first to fourth cylinders to perform the replacement work.

Moreover, according to the present invention, since the bearing tube is supported by contacting the first supporting surface of the bend block and the second supporting surface of the supporting piece, the work roll is prevented from rattling. Since stable rolling can be performed and the rattling does not occur, the dead zone of bending force action can be eliminated, high speed and precise control can be performed, and hunting can be performed. The risk of occurrence can be eliminated.

Further, according to the present invention, the bearing tube has an outer diameter equal to or smaller than the outer diameter of the work roll, as is apparent from FIGS. 1 and 5, and therefore, when the work roll is replaced, It is easy to move the roll in the axial direction,
When the work roll moves in the axial direction, the components of the rolling mill that interfere with the work roll and hinder its movement are
Workability is good because there is no need to retreat to a position that exceeds the outer diameter of the work roll.

Embodiment FIG. 1 is a simplified sectional view of a part of an embodiment of the present invention. A material to be rolled such as a steel plate is supplied as indicated by arrow 1 from the inlet side on the right side of FIG. 1, rolled by work rolls 2a and 2b, and arrow 1a from the outlet side on the left side of FIG. The material to be rolled after the rolling is introduced as shown by. In the following description, the subscripts “a” and “b” of the reference numerals may be omitted and shown collectively. The work rolls 2a and 2b are the intermediate rolls 3a and 3b and the back-up rolls 4a and 4b, which are arranged above and below, respectively.
Supported by. The axes of the intermediate rolls 3a, 3b and the back-up rolls 4a, 4b are located within one vertical plane 5, and on the output side of the vertical plane 5, the axis center of the work rolls 2a, 2b, namely the work rolls 2a, 4b. A straight line passing through 2b is located, and its displacement amount is indicated by reference numeral 8. The work rolls 2a, 2b are horizontal intermediate rolls 6a, which are arranged on the exit side.
It is supported by 6b and horizontal side support rolls 7a, 7b. A plurality of horizontal side support rolls 7a and 7b are arranged at intervals in the axial direction (direction perpendicular to the paper surface of FIG. 1). As shown in FIG. 5 which will be described later, bearing cylinders 8a and 8b that are rotatable with the work rolls 2a and 2b are provided at both ends of the work rolls 2a and 2b in the axial direction.
The bearing cylinders 8a and 8b are supported on the entrance side by bend blocks 9a and 9b arranged on the entrance side.

FIG. 2 is an exploded perspective view showing a structure for supporting the bearing tubes 8a, 8b on the entry side. Bend blocks 9a and 9b are bearing tubes 8a and 8b.
It has arcuate support surfaces 10a, 10b that are in contact with the outer peripheral surface of.
One bend block 9a has a first double-acting hydraulic cylinder.
The end of the piston rod 12 of 11 is connected by a pin 13.
The head end of the cylinder 11 is connected to the other bend block 9b by a pin 14. The axes of pins 13 and 14 are
It is perpendicular to the moving direction 1, 1a (horizontal direction in FIG. 1) of the material to be rolled and perpendicular to the plane of the paper in FIG.

Guide protrusions 16 and 17 are formed on the bend blocks 9a and 9b so as to protrude outward. The guide protrusions 16 and 17 are formed in the guide grooves 1 of the pair of shift blocks 18a and 18b arranged vertically.
The bend blocks 9a, 9b and the shift blocks 18a, 18b can be displaced in the vertical direction relative to each other by fitting into the shafts 9a, 19b respectively.

The upper end surface of the bend block 9a comes into contact with the contact surface 20a formed on the shift block 18a, and the mutual displacement of the bend block 9a and the shift block 18a is limited. Further, the lower end surface of the bend block 9b abuts on the contact surface 20b formed on the shift block 18b, whereby the mutual displacement of the bend block 9b and the shift block 18b is limited. Thereby, the positions of the bend blocks 9a and 9b when the work rolls are exchanged are determined.

For the shift blocks 18a, 18b, the second cylinder 21
The piston rods 23a, 23b connected to the pistons 22a, 22b housed in are fixed to the end walls 25a, 25b of the shift blocks 18a, 18b using nuts 24a, 24b.

3 is a sectional view taken along section line III-III in FIG. 1, and FIG. 4 is a sectional view taken along section line IV-IV in FIG. With reference to these drawings, pistons 22a and 22b are housed in cylinder chambers 26a and 26b of cylinder 21, respectively, and are closed by lids 27a and 27b. Can operate as a double-acting cylinder. The cylinder 21 is attached to the rolling mill housing 28 provided at a fixed position.

FIG. 5 is a perspective view showing the work roll 2a, the horizontal intermediate roll 6a, and the horizontal side support roll 7a. A support piece 31a having an arcuate support surface 30a for supporting the bearing cylinder 8a of the work roll 2a can be displaced by a double-acting hydraulic cylinder 32a. The cylinder 32a is attached to the arm 33a. The shaft end 34 of the horizontal intermediate roll 6a is
Supported by 35. The locking projection 37 of the arm 33a is locked in the locking groove 36 of the roll chuck 35, whereby the roll chuck 35, and hence the horizontal intermediate roll 6a, can be displaced. The shaft end 18 of the rotary shaft 17 of the horizontal side support roll 7a is attached to the arm 33a, and thus the arm 33a can swing with the axis of the horizontal side support roll 7a and the arm 33a being common. The other work roll 2b has the same configuration.

Referring again to FIG. 1, the cylinder 40 is connected to the arm 33b by the pin 41, and the piston rod 32 is connected to the arm 33a by the pin 43.

Thus, the bend blocks 9a, 9b are moved by the first cylinder 11.
Of the work rolls 2a, 2b when the work rolls 2a, 2b are exchanged because the shift blocks 18a, 18b can be horizontally displaced by the second cylinder 21 by displacing the work rolls 2a, 2b vertically. Can be maintained at a predetermined constant deviation amount δ from the vertical plane 5 (see FIG. 1), which improves the sheet thickness accuracy, the sheet shape control performance, the highly efficient production and the stable rolling. You will be able to work.

The operation of the cylinders 11 and 40 can change and control the axial deflection of the work rolls 2a and 2b.

When replacing the work rolls 2a and 2b, first, the cylinders 11 and 40 are extended. By extending the cylinder 11, the bend block
9a and 9b are brought into contact with the contact surfaces 20a and 20b of the shift blocks 18a and 18b and brought to the stroke ends. Also, cylinder 21
The pistons 22a and 22b of the. As a result, the axes of the work rolls 2a and 2b are brought to predetermined positions.
Therefore, the work rolls 6a and 6b to be exchanged are gripped by the roll exchange device. After that, when the work rolls 2a, 2b are pulled out, the shift blocks 18a, 18b are moved by the cylinder 21 so that the work rolls 2a, 2b do not contact the bend blocks 9a, 9b.
Displace b to the entry side (right in Fig. 1). Support pieces 31a, 31b
Also, the cylinder 32a or the like prevents the work rolls 2a and 2b from displacing toward the exit side (left side in FIG. 1) when the work rolls 2a and 2b are pulled out. When inserting the work rolls 2a and 2b, the reverse operation is performed. Note that the bend blocks 9a, 9b and the support pieces 31a, 31b are the bearing cylinders 8 of the work rolls 2a, 2b during rolling.
It is in close proximity to a or 8b or is in contact with a small force. The configuration will be further described. As is clear from FIG. 5, the bearing tube 8a is
The work roll 2a has an outer diameter equal to or smaller than the outer diameter of the work roll 2a.

As is apparent from FIG. 1, the bend blocks 9a, 9 forming a pair of upper and lower sides on one side (right side in FIG. 1) of the work rolls 2a, 2b.
b are arranged respectively. The support surfaces 10a, 10b of the bend blocks 9a, 9b are recessed support surfaces 10a, 10b for supporting the one side portion (the right side in FIG. 1) of the outer peripheral surface of each bearing tube 8a, 8b. Have. The support pieces 31a, 31b are the work rolls 2a,
On the other side of 2b (on the left in FIG. 1), they are arranged in pairs, one above the other. As is apparent from FIG. 5, the support piece 31a has a recessed support surface 30a for supporting the portion on the other side of the outer peripheral surface of the bearing tube 8a (left side in FIG. 1). The same applies to the other support piece 31b. Support piece 31a
5 is connected to the cylinder 32a, and the end of the cylinder 32a opposite to the support piece 31a is
The arm 33a is provided so as to be swingable around the horizontal axis of the support roll 7a which is leveled as described above, which is also the case with the other support piece 31b, the cylinder 32a and thus the arm 33a. Is oscillated by a cylinder 40, which is the same for the other arm 33b.

The present invention also relates to a rolling mill having a configuration in which each axis of a work roll, an intermediate roll, and a backup roll is arranged in one vertical plane, and a horizontal intermediate roll and a horizontal side support roll are omitted. It can also be implemented.

As described above, according to the present invention, since the bend block and the shift block can be displaced by the first and second cylinders, the positions of the upper and lower work rolls can be held at desired predetermined positions. By doing this, the position of the work roll is brought to a predetermined position, and automatic roll exchange work by the roll exchange device can be performed, and the time required for roll exchange can be shortened and the roll exchange work can be performed. It becomes possible to prevent mistakes, which also improves the operation efficiency. Furthermore, the configuration of the present invention is simple and easy to maintain. In particular, according to the present invention, one side portion of the outer peripheral surface of the bearing cylinder, which is rotatably provided with respect to the workpiece, is supported by the concave first supporting surface of the bend block, and the outer peripheral surface of the bearing cylinder is supported. The other side portion is supported by a second supporting surface which is formed by recessing the supporting piece, and the bend block is driven by the first cylinder to move up and down with respect to each other, and by the second cylinder. And is laterally displaced and driven via a shift block, and the support piece is connected to a third cylinder, and the end of the third cylinder opposite to the support piece is swingable about a horizontal axis. Since the third cylinder is rockably driven by the fourth cylinder, the first and second support surfaces can be brought into contact with the outer peripheral surface of the bearing cylinder without forming a gap for rolling. Of the bearing tube and work roll Backlash can be prevented to occur. Thereby, the excellent effect that stable rolling can be performed is achieved. In particular, when the bending force changes and the direction of action of the bending force also changes, there is no gap as described above, so there is no dead zone, which allows high speed and precise control. It can be carried out and does not cause hunting to make rolling impossible.

Further, according to the present invention, the work roll is provided with the bearing cylinder, and the work roll and the bearing cylinder may be integrally exchanged, and the work such as attachment and detachment of the hydraulic oil pipe line is not required. Therefore, the work rolls can be easily replaced, there is no environmental pollution due to oil leakage, and the amount of hydraulic oil consumed due to the oil leakage does not increase.

Further, according to the present invention, the bearing tube has an outer diameter equal to or less than the outer diameter of the work roll, and accordingly, when the work roll is moved in the axial direction when the work roll is replaced, another configuration of the rolling mill is used. It is not necessary to retract the element further beyond the outer diameter of the work roll so as not to interfere with the work roll, and therefore the work roll can be easily replaced.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view of an embodiment of the present invention, FIG. 2 is an exploded perspective view showing a structure for supporting the bearing tubes 8a and 8b on the inlet side, and FIG. 3 is a section line of FIG. Sectional view seen from III-III, No. 4
The drawing is a sectional view taken along the section line IV-IV in FIG. 3, and FIG. 5 is a perspective view showing the work roll 2a, the horizontal intermediate roll 6a, and the horizontal side support roll 7a. 2a, 2b …… Work roll, 3a, 3b …… Intermediate roll, 4a, 4b
...... Back up roll, 6a, 6b …… Horizontal intermediate roll, 7
a, 7b …… Horizontal side support roll, 8a, 8b …… Bearing tube, 9a, 9b …… Bend block, 11 …… First cylinder, 1
8a, 18b …… Shift block, 21 …… Second cylinder

Claims (1)

[Scope of utility model registration request] 1. A pair of upper and lower work rolls each having a horizontal axis are provided with bearing cylinders each having an outer diameter equal to or smaller than an outer diameter of the work roll rotatably with respect to the work roll. The upper and lower paired bend blocks are respectively disposed on one side of each of the plurality of bend blocks, and each bend block has a recessed first supporting surface for supporting the one side portion of the outer peripheral surface of each bearing tube. , Each of the bend blocks is provided so as to be vertically movable by being guided by a pair of upper and lower shift blocks, and the bend blocks are brought close to each other vertically by a first cylinder pin-connected to the upper and lower bend blocks. The shift blocks are driven to move away from each other, and each shift block is laterally displaced and driven by the second cylinder. On the other side of each work roll, the upper and lower support pieces forming a pair are respectively driven. Each supporting piece has a second concave supporting surface that supports the other side portion of the outer peripheral surface of each bearing tube, and each supporting piece is connected to a third cylinder, respectively. An end of the cylinder opposite to the support piece is swingably provided around a horizontal axis, and the third cylinder is swing-driven by a fourth cylinder pin-connected to the upper and lower third cylinders. A rolling mill characterized in that