JPH04100608A - Rolling roll with variable width - Google Patents

Abstract

PURPOSE:To make rolling width variable arbitrarily and online by screwing a female screw and male screw which are provided on both slide blocks on the operation side and driving side and which are different in the direction of turn to width adjusting screw blocks with thread which are engaged with each of them. CONSTITUTION:In the case of extending the length W of roll barrel, when a motor 27 is operated, a reduction gear 28 and pinion 29 are revolved and the adjusting screw block 25 is revolved without moving in the axial direction of roll through a spacer 26 with gear which is engaged with that pinion 29. When, each of the slide blocks 18, 22 on the operation side and driving side which are screwed to that width adjusting screw block 25 with threads with the same pitch and the different direction of turn perform relatively separating movement in the axial direction of roll at a speed that is determined by the rotational speed of the width adjusting screw block 25 and screw pitch and the length W of roll barrel can be extended. Next, in the case of shortening the length W of roll barrel, the motor 27 is reversely revolved.

Description

Detailed Description of the Invention (Field of Industrial Application) This invention relates to a horizontal roll of a universal rolling mill used for manufacturing section steel, particularly a variable-width rolling mill that enables the rolling width to be changed by changing the roll body length. It's about roles.

Among the steel sections, H section steel is generally rolled using a universal rolling mill that incorporates a pair of upper and lower horizontal rolls and a pair of left and right vertical rolls in the same stand. When manufacturing H-section steel using such a rolling mill, the flange width can be freely changed as long as it is within the roll body length of the vertical roll, and the nib height h is h = W + 2t, In other words, since it is determined by the flange thickness tl and the roll body length W of the horizontal roll (see Figure 4), fixing the roll body length of the horizontal roll, that is, the rolling width, causes the following problems. It was requested that the width be made variable.

a) Because the inner surface of the flange is rolled using the end face of the horizontal roll, the end face of the horizontal roll is subject to severe wear, and even within the same rolling opportunity, as the amount of rolling increases, the web height becomes insufficient, making it difficult to stabilize products of a constant size. In order to avoid this, frequent changes of rolls were required.

b) The web height is 10 mm and only one size can be selected.

1) H-section steel with a constant web height (outer web width) h has a constant outer diameter H-section steel, but there are many types of flange thickness (tl) even with the same designation size (for example, H600X20
0 is 12m+n~28mm), rolling width of horizontal roll (
W) may need to be changed appropriately depending on the flange thickness.

In order to cope with this, it is necessary to frequently replace the rolls, which hinders productivity, and requires a large number of man-hours for replacement and the need to maintain a large number of rolls.

(Mechanical) In order to improve dimensional accuracy, frequent processing is performed to match the rolling width (W) to the internal dimension (W, ) of the H-section steel, which increases the roll unit consumption.

(Prior art) As an attempt to solve these problems, for example, in Japanese Patent Application Laid-open No. 169105/1987, a spacer for adjusting the rolling width is inserted between a pair of sleeve rolls to prevent wear of the rolls. A device to deal with this problem (see Fig. 5) or Japanese Patent Application Laid-Open No. 61-2
No. 62407 discloses a rolling roll in which the rolling width is adjusted by moving the sleeve roll along the roll axis direction around the roll center using an adjustment drive shaft on the extension of the roll axis, and Japanese Patent Application Laid-Open No. 1317607 is a rolling roll in which one of the divided sleeve rolls is fixed and the other roll is moved to adjust the rolling width, or JP-A-59-2
No. 02101 and No. 61-172605 each disclose a method and an apparatus for freely changing the web height of a section steel using oblique rolls.

(Problem to be solved by the invention) A device for inserting a spacer between sleeve rolls has problems such as the horizontal rolls having to be removed from the stand off-line, which impedes production efficiency and increases the number of assembly and disassembly steps. . When using oblique rolls, the equipment structure becomes complicated, resulting in increased costs and equipment maintenance. In addition, in rolling rolls in which the sleeve roll is moved using an adjustment drive shaft on the roll axis extension,
In addition to leaving problems with the reliability and rigidity of the equipment, assembly and disassembly are complicated and require a large amount of man-hours and time.

Further, a rolling roll in which one of the split sleeve rolls is fixed and the other is moved is difficult to apply to a continuous rolling train because the roll center inevitably shifts when the rolling width is changed.

It is an object of the present invention to propose an advantageous variable width mill roll that does not cause such problems.

(Means for Solving the Problem) This invention divides the roll cylinder into two parts, a drive side and an operation side, and enables relative movement toward and away from each other along the roll axis direction, so that each roll chock on the drive side and operation side In the rolling roll to be supported, the bearing is fitted so that the roll shaft of the driving side roll cylinder passes through the roll shaft hollow neck of the operating side roll cylinder so that it can be inserted and removed in the roll axis direction and rotated synchronously, and the bearing is fitted so that it can be inserted and removed in the roll axis direction and rotated synchronously. An operation-side slide block that is restricted to rotate or can only slide in the roll axis direction is attached to the side shaft end via a thrust bearing, while a push shaft is arranged adjacent to the operation-side shaft end of the drive-side roll shaft. A driving side slide block, which is restricted to rotation and can only slide in the direction of the roll axis, is attached to this pushing shaft via a thrust bearing, and both the operating side and driving side slide blocks are configured to control the winding direction. This variable width rolling roll is characterized in that it is provided with different female and male threads, and is threadedly connected to a width adjusting screw provided with a thread that fits each of these threads.

It is preferable that the drive-side roll chock is provided with a pushing device for moving the drive-side roll shaft in the direction toward the roll shaft operation side.

(Function) The present invention relates to a horizontal roll of a universal rolling mill.
In order to solve all the problems with conventional equipment, the rolling width can be changed arbitrarily online without changing the roll center, and in addition, the roll axis, chock, and rolling width changing device can be easily attached and detached. The aim was to solve the problems mentioned above.

(Example) The present invention will be specifically described below with reference to the drawings.

FIG. 1 shows the main parts of a universal rolling mill equipped with variable width rolling rolls of the present invention. The number l in the figure is the H of the rolled material.
Shaped steel, 2.2' is a variable width rolling roll, 3.3' is a drive side roll chock, 4.4' is an operation side roll chock, 5
．． 5' is the spindle coupling that connects the horizontal roll to the drive device, 6.6' is the roll-down and roll-down screw, respectively, 7.7' is the vertical roll, 8.8' is the chock for the vertical roll, and 9.9' is the support box. It is. The pair of upper and lower variable width rolling rolls 2.2' have the same structure, and the variable width rolling roll 2 will be described below.

FIG. 2 shows such a variable width roll 2 in cross section. H
The roll cylinder that controls the rolling of the web portion and the inner surface of the flange of the section steel 1 has a two-part structure, consisting of a drive-side roll cylinder 10a and an operation-side roll cylinder 10b.The roll shaft 11a of the drive-side roll cylinder 10a is Drive side roll chock 3 through
Similarly, the roll shaft 11 of the operating side roll cylinder 10b
b is supported by the operating side roll chock 4 via a bearing 13. Note that this drive side and operation side roll chock 3.
4 are supported by the housing 14, respectively. Further, the driving side roll shaft 11a is connected to a driving device (not shown) via a spindle coupling 5 at the driving side shaft end, and the torque necessary for rolling is transmitted from this driving device.

Further, the drive side roll shaft 11a is passed through the hollow neck of the roll shaft 11b of the operation side roll cylinder 10b, and fitted through the metal 15 so that it can be inserted and removed in the roll axis direction and can rotate synchronously to transmit rolling torque. In the figure, an example is shown in which the torque from the drive-side roll shaft 11a is transmitted to the operation-side roll shaft 11b via the sliding key K, but this is not limited to the key.

A rolling width changing device is provided at the operation side shaft end of each of these drive side and operation side roll shafts 11a, 11b to relatively move both in the roll axis direction.

This rolling width changing device is built into a support box 9a bolted to the operation side roll chock 4 and a support box 9b connected to the support box 9a, and has the following structure.

First, a thrust bearing 16 for receiving a thrust load during rolling and a load cell 17 are fitted to the end of the operation side roll shaft 11b, and an operation side slide block 18 is mounted via the thrust bearing 16.

This operating side slide block 18 is provided with a female screw that fits into a width adjustment screw block 25 which will be described later.

Further, the operation side roll chock 4 and the support box 9b are fitted together by, for example, a key or a spline, so that the rotation of the operation side slide block 18 is restricted and only sliding in the roll axis direction is possible.

On the other hand, a push shaft 19 that fits into the spherical surface of the 20 shaft end is arranged adjacent to the end of the drive side roll shaft 10a in the longitudinal direction of the shaft. A radial bearing 21 for receiving is fitted together, and a drive side slide block 22 is attached via the second thrust bearing 20 and radial bearing 21. This driving side slide block 22 is provided with a male screw that fits into a width adjusting screw block 25 to be described later, and has the same screw pitch and different winding direction as the aforementioned operation side slide block.

Further, it is coupled to a rotation stopper 24 provided on the case 23 in order to restrain the rotation of the drive side slide block 22 and allow sliding only in the roll axis direction.

The operating side slide block 18 and drive side slide block 22 described above are screwed together to a width adjusting screw block 25 provided on the outer and inner peripheral surfaces with screws that fit with the female and male screws provided thereon, respectively. .

This width adjustment screw block 25 is installed in the support box 9 so that movement in the roll axis direction is restricted and only rotation is possible on the spot. One end of a geared spacer 26 is removably attached to this width adjustment screw block 25, and a gear is provided on the inner peripheral surface of the other end of this geared spacer 26, and this gear is connected to a pinion 29 connected to an electric motor 27 and a reducer 28. meshes with

Furthermore, since the roll is a variable width roll, there is a gap between the drive side roll cylinder 11a and the operation side roll cylinder 11b, which may allow scale or water to enter, so a scale seal 30 is provided between the roll cylinders.

Further, a pushing device 31 provided on the drive side roll chock 3
For example, as shown in FIG.
The slide rod 32 is arranged parallel to the center, and has a roller 34 at one end thereof, and a plunger 36 which engages with a fixed hydraulic cylinder 35 at the other end.

Next, the operation of changing the rolling width will be explained.

To first widen the roll body length W shown in FIG.
The width adjusting block 25 rotates without moving in the roll axis direction via the geared spacer 26 that meshes with the pinion 29. Then, the operation side and drive side number slide blocks 18.2 are screw-coupled to this width adjustment screw block 25 with the same pitch but different winding directions.
2, the width adjusting screw block 25 is moved relatively apart in the roll axis direction at a speed determined by the rotation speed and the screw pitch. After all, this operation side slide block 1
8 is the operating side roll shaft 11b via the thrust bearing 16.
, is connected to the operation side roll cylinder 10b, and the drive side slide block 22 is connected to the drive side roll cylinder 10a via the thrust bearing 20, push shaft 19 and drive side roll shaft 11a. The long W can be expanded.

Next, when narrowing the roll body length, the electric motor 27 is rotated in the opposite direction to when widening the roll body length.

Then, the operating side roll cylinder 10b moves in a direction in which the length of the roll cylinder becomes narrower. However, since the drive-side roll shaft 11a of the drive-side roll cylinder 10a is only in contact with the pushing shaft 19 via the spherical surface of the shaft end, even if the driving-side slide block 22 and the pushing shaft 19 move, the roll shaft It cannot be moved in the direction of lengthening or narrowing.

Therefore, first, the push-in shaft 19 is moved by the above-described operation, and the spherical seat at the end of the push-in shaft is set at a predetermined position.

Next, the pushing device 31 provided on the drive-side roll chock 3 is activated. That is, when the plunger 35 that engages with the hydraulic cylinder 34 is operated in the pushing direction, the slide rod 32 and roller 33 connected to the plunger 35 also move in the same direction, and the roller 33 comes into contact with the end surface of the drive-side roll shaft 11a. By pushing the drive-side roll shaft 11a as a lever, the drive-side roll shaft 11a is moved in a direction in which the length of the roll body is narrowed. The positioning of the drive-side roll shaft 11a is completed by detecting that the spherical surface of the shaft end of the drive-side roll shaft 11a comes into contact with the spherical seat of the push-in shaft 19 and the pressure of the hydraulic cylinder 34 increases.

The pitches of the screws provided on the width adjusting screw block 25 are basically the same on both the left and right sides, or may be different pitches if necessary without any problem.

Further, since the rolling width changing device can be separated only at the joint surfaces 9a and 9b of the support box 9 in FIG. 2, it can be easily separated from the roll body and assembled.

(Effect of the invention) Thus, the present invention relates to a variable width rolling roll,
Significant effects as described below can be obtained.

a) The width of the roll can be changed arbitrarily online by remote control.

b) It is possible to change the width of the roll by shifting the same amount left and right around the roll center, so it can be easily applied to tandem rolling mill rows.

C) Even if roll wear occurs, products with constant dimensions can be obtained by changing the width.

d) It is possible to make products of different sizes without changing rolls.

e) Since the rolls and rolling width changing device can be easily separated and assembled in a short period of time, the number of width adjusting devices may be smaller than the number of rolls.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the main parts of a universal rolling mill equipped with a variable width rolling roll of the present invention, Fig. 2 is a sectional view of the variable width rolling roll of the invention, and Fig. 3 is a chock provided on the drive side roll. FIG. 4 is a cross-sectional view showing an example of a pushing device; FIG. 4 is an explanatory view of rolling an H-section steel using a universal rolling mill; FIG. 5 is an explanatory view of a conventional off-line variable width rolling roll. 1... Material to be rolled 2.2'... Variable width rolling roll 3.3'... Drive side roll chock 4.4'... Operating side roll chock 10a... Drive side roll cylinder 10b... Operating side roll cylinder 11a... Drive side roll shaft 11b... Operating side roll shaft 16... Thrust bearing 18... Operating side slide block 19... Push shaft 2o... Thrust 22...
... Drive side slide block 25 ... Width adjustment block patent applicant Kawasaki Steel

Claims (1)

[Claims] 1. The roll cylinder is divided into two parts, a drive side and an operation side, allowing relative movement toward and away from each other along the roll axis direction,
In the rolling rolls supported by bearings on each roll chock on the drive side and the operation side, the roll axis of the drive side roll cylinder is passed through the roll shaft hollow neck of the operation side roll cylinder and fitted so that it can be inserted and removed in the roll axis direction and rotated synchronously, An operating side slide block whose rotation is restricted and is capable of sliding only in the roll axis direction is attached to the operating side end of the operating side roll shaft via a thrust bearing.
A push-in shaft is arranged adjacent to the operation-side shaft end of the drive-side roll shaft, and a drive-side slide block whose rotation is restricted and can only slide in the roll axis direction is attached to the push-in shaft via a thrust bearing. , Both of these operation side and drive side slide blocks shall be provided with female threads and male threads with different winding directions, and these screws shall be threadedly connected to width adjustment screws provided with threads that fit with each of these screws. A variable width rolling roll featuring: 2. Claim 1, wherein the drive-side roll chock is provided with a pushing device for moving the drive-side roll shaft in the direction of the roll shaft operation side.
Variable width rolling roll as described.