JPS5870909A - Moving device of sleeve in rolling mill - Google Patents

Abstract

PURPOSE:To stably and accurately control the movement of a sleeve in its axial direction, by respectively providing annular hydraulic cylinders, rotating with a roll in one body, to the ends of the roll, and abutting sliding parts of said cylinders against the sleeve in its axial direction so as to fix the sleeve to an optional position in its axial direction. CONSTITUTION:When a sleeve 11 is moved, e.g. to the right, a hydraulic pressure controlling circuit 22 supplies a pressurized oil from a hydraulic pressure source 24 to an oil feeding path 16 through an outside piping 20. The pressurized oil flows from a pocket 44, formed between a roll 10 and a main body 12a of hydraulic cylinder, into a cylinder chamber 27 through an oil feeding path and pushes a piston 25 to the right to move the sleeve 11 to the right. The moving quantity of the sleeve 11 is detected by a moving quantity detecting sensor 28, and when the sleeve 11 attains the prescribed moving quantity, the circuit 22 supplies the oil to an outside piping 21 too, to actuate hydraulic cylinders 12 and 13 of left and right sides to push the sleeve 11 from both sides in order to lock the sleeve 11.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sleeve moving device in a rolling mill in which a sleeve is fitted around the outer periphery of a roll so as to be movable in the axial direction of the roll.

The present applicant has already provided a rolling mill with excellent shape control ability and plate crown control ability in plate rolling (Patent Application No. 58-1
No. 60788). This relates to a rolling mill in which a sleeve is fitted around the outer circumference of the roll so as to be movable in the axial direction of the roll, and an initial crown is formed on the outer circumferential surface of the roll and the inner circumferential surface or outer circumferential surface of the sleeve with approximately the same shape but with concavities and convexities in opposite directions. By moving the sleeve in the roll axis direction relative to the roll, a gap is created between the sleeve and the roll, and when a rolling load is applied to the outer circumference of the sleeve, the sleeve bends inward and the outer circumferential surface of the sleeve A desired convex crown is formed on the surface.

By the way, when moving the sleeve relative to the roll,
Since the amount of movement of the sleeve directly affects the shape of the convex crown, the amount of movement must be adjusted accurately, and the sleeve must be fixed so that it does not move relative to the rolls during rolling.

Therefore, a sleeve moving device as shown in FIG. 1 can be considered. In other words, 1 is the sleeve, 2 is the roll, 3 is the sleeve fixing jig, 4 is the arm, 5 is the feed screw, 6 is the motor, 7 is the fixing base, and 8 is the roll stand, which drives the motor 6. By doing so, the feed screw 5 is rotated to move the arm 4 to the left or right in the figure, and the sleeve 1, whose both ends are held by the sleeve fixing jig 3, is moved to the left or right together with the arm 4. It is something.

However, in this case, since both end surfaces of the sleeve 1 and the sleeve fixing jig 3 come into sliding contact, when the sleeve I rotates at high speed during rolling, the sleeve fixing jig 3 is severely worn. Therefore, in order to minimize the frictional resistance, the sleeve fixing jig 8 may be a roller that rotates in synchronization with the sleeve 1, but in the case of a normal rolling mill, the gap between the sleeve end and the bearing box is not very large. Therefore, the outer diameter of the roller will inevitably become smaller. Now, the rolling speed is 150
0 mpm and the outer diameter of the roller is 100 Wφ, the rotation speed of this roller is 4800 rpm, which poses a problem in terms of life.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a sleeve moving device for a rolling mill that can adjust the amount of sleeve movement with high precision and has a long life.

Hereinafter, the present invention will be specifically explained based on illustrated embodiments.

In FIG. 2, 10 is a roll of a rolling mill, and 11 is a sleeve fitted onto the outer circumference of the roll 10 so as to be movable in the roll axis direction. Initial crowns having the same shape but opposite directions of projections and recesses are provided, and by moving the sleeve 11 in the axial direction, the structure is such that the overall shape can be given a desired round shape.

12.18 is the left side in which the main body is integrally fixed to the roll 10 by utilizing the spaces between each shoulder between the roll part of the roll 10 and each sleeve part and the bearings 14 and 15 of the roll 10, respectively; The annular hydraulic cylinder on the right, 16.17 are oil supply passages formed inside the roll 10 to supply hydraulic pressure to the left and right hydraulic cylinders 12 and 13, respectively, and 18.19 are oil supply passages 1 for each oil supply passage 1.
The structure itself connecting the roll shaft end of 6.17 and the external oil supply pipe 20.21 is a well-known rotary joint, 2
Reference numeral 2 denotes a hydraulic control circuit that controls the hydraulic pressure supplied from the hydraulic power source 24 to the left and right external pipes 20 and 21 using a detection signal from a sensor 23 that detects the amount of movement of the sleeve 11'o as input information.

As shown in FIG. 3, the structures of the left and right hydraulic cylinders 12, 18 are shown in detail, respectively, in the illustrated example, the left hydraulic cylinder.

The structure of the right hydraulic cylinder 12.18 is changed, and the hydraulic cylinder 1 on the curved part 10a side of the roll lO, that is, the left hydraulic cylinder 1 in the figure
2, one end of a ring-shaped piston 25 whose surface is plated with hard chrome is fitted into an annular cylinder chamber 27 through a U-packet 26 so as to be able to move forward and backward, and the other end of the piston 25 is fitted with a lining 28 made of nylon or the like. A lubrication space 29 is formed between the sleeve 11 and the roll lO, which is sealed from the outside.As shown in FIG. The sleeve 1 is supplied with lubricating oil from the lubricating oil supply path 30 provided inside.
1 and the roll 10 to ensure lubrication.

On the other hand, the hydraulic cylinder 13 on the right side of FIG.
A cylinder chamber 33 is formed between the main body 18a and a slide ring 32 whose inner peripheral surface is plated with hard chrome, which slides on the straight portion 10b of the main body 13a. They were fitted into the outward flange portions 18b, respectively. The cylinder chamber 88 is sealed from the outside by the rings 84 and 85, and the inner end surface of the slide ring 82 is brought into contact with the right end surface of the sleeve 11 via a lining 36 made of nylon or the like.

In FIG. 8, 8.7 and 88 are the main bodies 12a and 18 of the annular hydraulic cylinder 12.18 supported by the support member 89.40 on the pinion stand (not shown) side, respectively.
This is the bearing a. Further, 41 is a sensor terminal of the movement amount detection sensor 28, which is brought into contact with the side surface of a rib 82b provided on the outer periphery of the slide ring 32.

In the above configuration, the sleeve 11 is used for crown adjustment.
For example, when it is necessary to move to the right in the figure, the hydraulic control circuit 22 supplies pressurized oil from the hydraulic source 24 to the oil supply path 16 from the left external piping 20. The pressure oil in the oil supply path 16 is
The oil flows from the pocket 44 between the motor 10 and the hydraulic cylinder body 12a into the cylinder chamber 27 through a small diameter oil supply passage 45 that communicates this pocket 44 and the cylinder chamber 27, and pushes the piston 25 to the right. , moves the sleeve 11 to the right. The amount of movement of this sleeve 11 is detected by a movement amount detection sensor 28, and when the desired amount of movement is reached, pressure oil is also supplied to the hydraulic control circuit 22 to the external piping 21 on the right side of the figure, and the oil supply path 17 As in the case on the left side, pressure oil is supplied to the cylinder chamber 38 of the right hydraulic cylinder 13 through the path of the pocket 46 and the small diameter oil supply passage 47, and the pressing force of the left and right hydraulic cylinders 12.18 is applied from both directions. It acts on the sleeve 11 to lock the sleeve 11 in a desired position.

The leftward movement of the sleeve 11 can also be adjusted in the same manner as described above.

In addition, in the above embodiment, initial crowns were provided on the outer circumferential surface of the roll 10 and on the inner circumferential surface of the sleeve 11, but initial crowns were provided on the outer circumferential surface of the roll 10 and the outer circumferential surface of the sleeve 11. In this case as well, a convex crown can be formed on the outer peripheral surface of the sleeve 11 in exactly the same way.

In addition, in this embodiment, the outer circumferential surface of the rotating roll 10 and
Although the left and right hydraulic cylinders 12 and 18 have different structures in order to lubricate the inner peripheral surface of the sleeve 11, which does not substantially rotate, the present invention is not limited to this.

As is clear from the above description, according to the present invention, since the entire circumference of the end surface of the sleeve is supported by a pair of annular hydraulic cylinders, the axial movement of the sleeve can be controlled stably and accurately, and the sleeve can be fixed. Moreover, since the oil supply path is formed inside the roll and the hydraulic cylinder is annular, it can be reliably installed in the narrow space between the roll and its bearing. is obtained.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional front view showing an example of a sleeve moving device of a rolling mill, FIG. 2 is an axially perpendicular cross-sectional explanatory view showing a sleeve moving device according to an embodiment of the present invention, and FIG. A of
It is an enlarged detailed view of part B. 10...Roll, 11...Sleeve, 12
．． 18... Annular hydraulic cylinder, 16.17...
Refueling route.

Claims (1)

[Claims] (1) A sleeve is fitted onto the outer periphery of the roll so as to be movable in the axial direction of the roll, and an initial clarifier with approximately the same shape and concavities and convexities in opposite directions is formed on the outer circumferential surface of the roll and at least one of the inner and outer circumferential surfaces of the sleeve. In a rolling mill equipped with a rolling mill, annular hydraulic cylinders that rotate together with the rolls are installed at the ends of the rolls, and the sliding part of each hydraulic cylinder is brought into contact with the sleeve in the axial direction to move the sleeve at any axial position. 1. A sleeve moving device for a rolling mill, characterized in that the sleeve can be fixed and an oil supply path to each hydraulic cylinder is formed in the roll.