JPH0824936B2 - Variable width rolling roll - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a horizontal roll of a universal rolling mill used for manufacturing a shaped steel, in particular, a variable width rolling capable of changing a rolling width by changing a roll cylinder length. It's about rolls.

For rolling H-shaped steel among the shaped steels, a universal rolling machine in which a pair of upper and lower horizontal rolls and a pair of left and right vertical rolls are incorporated in the same stand is generally used. In manufacturing H-section steel by such a rolling mill, the flange width can be freely changed as long as it is within the range of the roll cylinder length of the vertical roll, but the web height h is h = W + 2t _1, that is, Since it is determined by the flange thickness t ₁ and the roll body length W of the horizontal roll (see FIG. 4), the following problems occur when the roll body length of the horizontal roll, that is, the rolling width is fixed. It was requested that the width be variable.

A) Since the inner surface of the flange is rolled by the end face of the horizontal roll, the end face of the horizontal roll is severely worn, and even within the same rolling opportunity, the web height becomes insufficient as the rolling amount increases, and the product of a certain size is stabilized. In order to avoid this, it was necessary to change the roll frequently.

B) Only one size of web height can be selected per roll.

C) The so-called constant external method H-section steel in which the web height (web outer width) h of the H-section steel is constant has many types of flange thickness (t ₁ ) even with the same nominal size.
m-28 mm), and the rolling width (W) of the horizontal roll must be changed appropriately according to the flange thickness. In order to deal with this, it is necessary to frequently replace the rolls, which hinders the productivity, and it is necessary to maintain a large number of replacement man-hours and a large number of rolls.

D) Since the rolling width (W) is frequently processed so as to match the inner dimension (W ₁ ) of the H-section steel in order to improve the dimensional accuracy, the roll unit becomes high.

(Prior Art) As an attempt to solve these problems, for example, in JP-A-61-169105, a roll width adjusting spacer is inserted between a pair of sleeve rolls to cope with roll wear. In the apparatus (see FIG. 5) and Japanese Patent Laid-Open No. 61-262407, a sleeve roll is moved by rolling along a roll axis centering on a roll center by using an adjusting drive shaft on the roll shaft extension. A rolling roll for adjusting the width is also disclosed in JP-A-1
No. 317607 discloses a rolling roll in which one of the divided sleeve rolls is fixed and the other roll is moved to adjust the rolling width.
No. 2605 each discloses a method and a device for freely changing the web height of a shaped steel by using a skew roll.

(Problems to be Solved by the Invention) In a device for inserting a spacer between sleeve rolls,
Since the horizontal roll must be removed from the stand offline, there are problems such as impeding production efficiency and increasing assembly and disassembly man-hours. When the skew roll is used, the equipment structure is complicated, the cost is increased, and the equipment maintenance is difficult. Rolling rolls that move sleeve rolls using an adjustment drive shaft for roll roll extension leave problems with equipment reliability and rigidity, and require complicated man-hours and time due to complicated assembly and disassembly. .

Further, a rolling roll in which one of the split sleeve rolls is fixed and the other is moved is unavoidable when the rolling width is changed and the roll center is displaced, so that it is difficult to apply it to a continuous rolling train.

It is an object of the present invention to propose an advantageous variable width rolling roll which does not cause such a problem.

(Means for Solving the Problem) The present invention divides the roll cylinder into a driving side and an operating side, enables relative movement to approach and separate from each other along the roll axial direction, and provides the driving side roll chock and the operating side roll chock with each other. In a rolling roll that supports bearings, the roll shaft of the drive side roll cylinder is inserted through the hollow shaft neck of the operation side roll cylinder so that it can be inserted / removed in the roll axis direction and can be rotated synchronously. On the side shaft end, an operation side slide block that is restricted in rotation and can only slide in the roll axis direction is mounted via a thrust bearing, while the spherical surface of the push shaft is attached to the spherical surface of the operation side shaft end of the drive side roll shaft. Seats are arranged adjacent to each other, and a drive-side slide block that is restricted in rotation and can only slide in the roll axis direction is attached to this push-in shaft through a thrust bearing. A variable width characterized in that both the drive side slide blocks are provided with internal threads and external threads with different winding directions, respectively, and are screwed to a width adjustment screw provided with a thread that fits with these threads. It is a rolling roll.

Here, the drive-side roll chock preferably includes a pushing device that moves the drive-side roll shaft in the roll-shaft operating side direction.

(Operation) The present invention relates to a horizontal roll of a universal rolling mill, and in order to solve all the problems in the conventional apparatus, the rolling width can be arbitrarily changed online without changing the roll center, and in addition to the roll shaft and the chock. The rolling width changing device has a structure in which it can be easily attached and detached to solve the above-mentioned problems.

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

FIG. 1 shows a main part of a universal rolling mill provided with the variable width rolling roll of the present invention. In the figure, number 1 is an H-shaped steel to be rolled, 2 and 2'are variable width rolling rolls, 3 and 3'are drive side roll chock, 4 and 4'are operating side roll chock,
5, 5'is a spindle coupling for connecting a horizontal roll to a drive device, 6 and 6'are screw down and up, respectively, 7, 7'is a vertical roll, 8 and 8'is a vertical roll chock, 9, 9 ′ Is a support box. The pair of upper and lower variable width rolling rolls 2 and 2'has the same structure, and the variable width rolling roll 2 will be described below.

FIG. 2 shows the variable width rolling roll 2 in cross section.
The roll cylinders that control the reduction of the web portion and the inner surface of the flange of the H-section steel 1 are the drive-side roll cylinder 10a and the operation-side roll cylinder 10b.
With a split structure, the roll shaft 11a of the drive-side roll cylinder 10a
Is supported by the drive side roll chock 3 via the bearing 12, and similarly the roll shaft 11b of the operation side roll cylinder 10b is received by the bearing.
It is supported on the operation side roll chock 4 via 13. The drive-side and operation-side roll chocks 3 and 4 are supported by the housing 14, respectively. Also, the drive side roll shaft 11a
Is connected to a drive device (not shown) at the drive-side shaft end via a spindle coupling 5, and the torque required for rolling is transmitted from this drive device.

Further, the drive-side roll shaft 11a is penetrated through the hollow shaft of the roll shaft 11b of the operation-side roll cylinder 10b so that it can be inserted / removed in the roll-axis direction and can be synchronously rotated to transmit rolling torque.
Fit through. In the figure, the case where the torque from the drive-side roll shaft 11a is transmitted to the operation-side roll shaft 11b via the slide key K is shown as an example, but this is not limited to the key.

Rolling width changing devices for relatively moving the roll shafts 11a and 11b on the driving side and the operating side are relatively provided on the operation side shaft ends. This rolling width changing device is incorporated in a support box 9a that is bolted to the operation side roll chock 4 and a support box 9b that is connected to this support box 9a, and has the following structure.

First, at the end of the operation side roll shaft 11b, there are a thrust bearing 16 and a load cell 17 for receiving a thrust load during rolling.
And the operation side slide block 18 is mounted via the thrust bearing 16. The operation side slide block 18 is provided with a female screw that fits with a width adjusting screw block 25 described later. Further, the operation side slide block 18 and the support box 9 are fitted to each other by, for example, a key or a spline in order to restrain the rotation of the operation side slide block 18 and allow only the sliding in the roll axial direction.

On the other hand, the operation-side shaft end of the drive-side roll shaft 11a has a spherical shape, and a push shaft 19 having a spherical seat that fits the spherical surface of this shaft end is arranged adjacently in the axial extension direction. , The thrust bearing 20 and the radial bearing 21 for receiving the radial load are fitted together, and the thrust bearing 20
Drive side slide block via radial bearing 21
Wear 22. The drive-side slide block 22 is provided with a male screw that fits in a width adjusting screw block 25 described later and has the same screw pitch as that of the above-mentioned operation-side slide block 25 but a different winding direction. In addition, in order to restrain the rotation of the drive-side slide block 22 and allow only sliding in the roll axis direction, the drive-side slide block 22 is connected to a rotation stopper 24 provided in the case 23.

The operation-side slide block 18 and the drive-side slide block 22 described above are screwed to the width adjusting screw block 25 provided on the outer peripheral surface and the inner peripheral surface, respectively. This width adjustment screw block
The 25 restrains the movement in the roll axis direction in the support box 9 and mounts it so that it can only rotate on the spot. One end of the geared spacer 26 is detachably attached to the width adjusting screw block 25, and a gear is provided on the inner peripheral surface of the other end of the geared spacer 26. The gear is the electric motor 27 and the reduction gear.
It meshes with the pinion 29, which runs from 28.

Since the roll is a variable width roll, a scale seal 30 is provided between the roll cylinders because a gap may be formed between the drive-side roll cylinder 11a and the operation-side roll cylinder 11b and scale or water may enter.

Further, the pushing device 31 provided for the driving side roll chock 3
Is, for example, as shown in FIG. 3, a slide rod 3 extending in the drive side roll chock 3 toward the drive side roll shaft 11a.
2 is arranged in parallel with the center of the drive-side roll shaft 11a via a bush 33, and a roller 34 is provided at one end of the slide rod 32, while a plunger 36 for engaging with a hydraulic cylinder 35 fixed at the other end is provided. It will be connected.

 Next, the rolling width changing operation will be described.

When the roll body length W shown in FIG. 2 is first widened,
When the electric motor 27 is operated, the speed reducer 28 and the pinion 29 rotate, and the geared spacer 26 that meshes with the pinion 29.
The width adjusting screw block 25 rotates without moving in the roll axis direction. Then, the slide blocks 18 and 22 on the operating side and the drive side, which are screw-coupled to the width adjusting screw block 25 with the same pitch but different winding directions, are speeds determined by the rotation speed of the width adjusting screw block 25 and the screw pitch. Moves relatively apart in the roll axis direction. Therefore, the drive-side slide block 18 has the thrust bearing 16
Is connected to the operation side roll shaft 11b and the operation side roll cylinder 10b via the drive side slide block 22 via the thrust bearing 20, the pushing shaft 19 and the drive side roll shaft 11a to the drive side roll cylinder 10a. Since the connection is made, the roll body length W can be widened.

Next, when the roll body length is narrowed, the electric motor 27 is rotated in the opposite manner to when the roll body length is widened. Then, the operating-side roll cylinder 11b moves in a direction in which the roll cylinder length is narrowed. However, since the drive-side roll shaft 11a of the drive-side roll cylinder 10a is only in contact with the push-in shaft 19 via the spherical surface at the shaft end, even if the drive-side slide block 22 and the push-in shaft 19 move, the roll cylinder It cannot be moved in a direction that narrows the length.
Therefore, first, the pushing shaft 19 is moved by the above operation to set the spherical seat at the end of the pushing shaft to a predetermined position. Next, the pushing device 31 provided on the driving side roll chock 3 is operated. That is, when the plunger 35 combined with the hydraulic cylinder 34 is operated in the pushing direction, the slide rod 32 and the 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 in the lever shaft 11a on the drive side, the roller shaft 11a on the drive side moves in a direction in which the length of the roll body is narrowed. The spherical surface of the drive-side roll shaft 11a comes into contact with the spherical seat of the push-in shaft 19, and the hydraulic cylinder
Drive side roll shaft is detected by detecting the pressure rise of 34.
Positioning of 11a is complete.

The pitch of each screw provided in the width adjusting screw block 25 is basically the same on the left and right, but there is no problem if the pitch is different if necessary.

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

(Effect of the Invention) Thus, according to the present invention, the following effects can be obtained with respect to the variable width rolling roll.

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

b) Since the width of the roll can be changed to the right and left around the roll center by the same amount, the roll width can be easily applied to the tandem rolling mill train.

c) Even if roll wear occurs, a product having a constant size can be obtained by changing the width.

d) Products of different sizes can be made without changing rolls.

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

[Brief description of drawings]

FIG. 1 is an explanatory view of essential parts of a universal rolling mill provided with a variable width rolling roll of the present invention, FIG. 2 is a sectional view of a variable width rolling roll of the present invention, and FIG. 3 is provided on a drive side roll chock. FIG. 4 is a cross-sectional view showing an example of a pushing device, FIG. 4 is an explanatory view of H-shaped steel rolling by a universal rolling mill, and FIG. 5 is an explanatory view of a conventional offline variable width rolling roll. 1 ... Rolled material 2, 2 '... Roll with variable width 3, 3' ... Roll chock for driving 4, 4 '... Roll chock for operating side 10a ... Roll cylinder for driving side, 10b ... Roll cylinder for operating side 11a ...... Drive side roll shaft, 11b …… Operation side roll shaft 16 …… Thrust bearing 18 …… Operating side slide block 19 …… Pushing shaft, 20 …… Thrust bearing 22 …… Drive side slide block 25 …… Width adjustment screw block

Claims (2)

[Claims] Claim: What is claimed is: 1. A rolling roll, wherein a roll cylinder is divided into a driving side and an operating side, and relative movement is made possible by approaching and separating from each other along the axial direction of the roll. The roll shaft of the side roll cylinder is inserted into the hollow neck of the drive side roll cylinder so that it can be inserted / removed in the roll axis direction and can rotate synchronously, and the rotation is restricted at the operation side shaft end of this operation side roll shaft. The operating side slide block that can slide only in the roll axis direction is mounted via the thrust bearing, while the spherical seat of the pushing shaft is arranged adjacent to the spherical surface of the operating side shaft end of the driving side roll shaft. A drive-side slide block, which is restricted in rotation and can only slide in the roll axis direction, is mounted on the shaft via a thrust bearing, and is mounted on both the operating-side and drive-side slide blocks. , The winding direction is provided differing internal thread and an external thread, respectively, the width variable rolling roll characterized by being screwed into width adjustment screw respectively installed stuck mutually screw and these screws. 2. The variable width rolling roll according to claim 1, wherein the drive side roll chock includes a pushing device for moving the drive side roll shaft in the roll shaft operating side direction.