JPH0433709A - Rolling roll of variable width - Google Patents

Abstract

PURPOSE:To remotely control the change of roll width by making the rolling width of the horizontal roll of a universal mill arbitrarily variable on-line and additionally making into a structure that the roll shaft, chucks and device for changing rolling width can be easily attached and detached. CONSTITUTION:A motor 25 is operated and a nut 22 for adjusting width is revolved in a roll chuck 4 on the operation side. The movement of this nut for adjusting width in the axial direction of roll is restrained with a fixed block 15 and press plate 29 which are fixed to the roll chuck on the operation side. Each of slide blocks 14, 20 on the operation side and drive side which are joined with a screw which has the same pitch and different direction of screw cutting from the nut 22 for adjusting width are relatively moved in the axial direction of roll. The slide block 14 on the operation side is connected to the roll shaft 10b and roll barrel 9b on the operation side through a thrust bearing 13. The slide block 20 on the drive side is connected to the roll barrel 9a on the drive side through a thrust bearing 18, radial bearing 19, connecting block 17, connecting bolt 16 and the roll shaft 10a on the drive side. So the length W of roll barrel can be freely adjusted.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention makes it possible to change the rolling width by changing the horizontal rolls of a 22-shaped rolling mill used for manufacturing section steel, especially the roll body length. The present invention relates to a variable width rolling roll.

Among 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 shaft. When manufacturing H-section steel using such a rolling mill, the flange width can be changed freely within the range of the roll body length of the vertical roll, but the web height h is h = W-, 2t +
In other words, the flange thickness tl and the roll body length W of the horizontal roll
(See Fig. 3).If the roll body length of the horizontal roll, that is, the rolling width, were fixed, the following problems would occur.Therefore, there was a demand for a patent that featured the rolling width.

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

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

1) H-section steel with a constant web height (web outer 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 12 mm to 28 mm), the rolling width of the horizontal roll (W
) must 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.

Work) 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 consumption rate.

(Prior art) As an attempt to solve these problems, for example, Japanese Patent Application Laid-Open No. 169105/1983 discloses a method in which a spacer for adjusting the rolling width is inserted between a pair of sleeve rolls to counteract wear of the rolls. The device (see Figure 4) was also developed in Japanese Patent Application Laid-open No. 61-2.
No. 62407 discloses a rolling roll in which the rolling width is adjusted by moving a sleeve roll that engages with an adjustment drive shaft on an extension of the roll axis along the roll axis direction around the roll center, and Japanese Patent Application Laid-Open No. 1-317607 In addition, a rolling roll in which one of the sleeve rolls is fixed and the other roll is moved to adjust the rolling width is also disclosed in Japanese Patent Laid-Open No. 59
JP-202101 and JP-61-172605 each disclose a method and an apparatus for freely changing the web height of a section steel using oblique rolls.

(Problems to be Solved by the Invention) In a device that inserts a spacer between sleeve rolls, the horizontal roll must 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, which increases costs and makes equipment maintenance difficult. In addition, in rolling rolls in which sleeve rolls are engaged with adjustment drive shafts on the extension of the roll shafts, there are problems with the reliability and rigidity of the equipment, and assembly and disassembly are complicated, requiring 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 when the rolling width is changed, the roll center inevitably shifts toward the operation side.

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 Problems) The present invention divides the roll cylinder into a drive side and an operation side, and enables relative movement of the roll cylinder toward and away from each other along the roll axis direction, and each roll chock on the drive side and operation side In a rolling roll in which a roll chock on the operation side is supported by a bearing, and a rolling width changing device for controlling the above-mentioned relative movement is attached to the roll chock on the operation side, the roll extension axis of the drive side roll body is connected to the roll axis hollow neck of the operation side roll body. The shafts are inserted into and removed from each other in the direction of the roll axis and fitted together so that they can rotate synchronously, and the rotation is restricted at the operation side shaft end of each of the drive and operation side roll shafts, allowing only sliding in the direction of the roll axis. The drive and operation side slide blocks are mounted via thrust bearings, and screws with the same pitch and different threading directions are provided on both the drive and operation side slide blocks. This is a variable width rolling roll characterized in that it is threadedly coupled to a width adjusting nut provided with screws that fit into the respective screws.

(Function) With regard to the horizontal rolls of a universal rolling mill, the present invention allows the rolling width to be arbitrarily varied online without changing the roll center, and in addition, the roll shaft, chock, and rolling width changing device can be easily attached and detached. By adopting this structure, we attempted to solve the above-mentioned problems.

(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 according to the present invention. Number 1 in the figure is the H of the material to be rolled.
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 a spindle coupling connecting the horizontal roll to the drive, 6. 6' is a reduction and reduction screw, 7.
7' is a vertical roll, and 8.8' is a chock for the vertical roll.

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.

The roll cylinder that controls the rolling of the web portion and the inner surface of the flange of the H-shaped steel l has a two-part structure, consisting of a driving side roll cylinder 9a and an operating side roll cylinder 9b, and the roll axis 1 of this driving side roll cylinder 9a
0a is supported by the drive-side roll chock 3 via a bearing 11, and similarly, the roll shaft 10b of the operating-side roll cylinder 9b is supported by the operating-side roll chock 4 via a bearing 12. The drive side and operation side roll chocks 3.4 are supported by a housing (not shown). Further, the driving side roll shaft 10a is connected to a driving device (not shown) via a spindle cup link 5 at the driving side shaft end, and the torque necessary for rolling is transmitted from this driving device.

Further, the roll extension shaft of the drive-side roll shaft 10a is passed through the hollow neck of the roll shaft 10b of the operation-side roll cylinder 9b, so that they can be inserted and removed in the roll axis direction, and are fitted together so that they can rotate synchronously while transmitting rolling torque. Although the figure shows an example of transmitting torque from the drive-side roll shaft to the operation-side roll shaft via the sliding key K, this is not limited to the key.

These drive side and operation side roll shafts 10a, 10b
A rolling width changing device is provided at the shaft end on the operating side of the roll for relatively moving the two in the roll axis direction.

This rolling width changing device has the following structure.

First, a thrust bearing 13 for receiving the thrust load during rolling is fitted to the end of the operating side roll shaft 10b.
The operating side slide block 14 is mounted via this thrust bearing 13. This operating side slide block 14 is provided with a screw that fits into a width adjusting nut 22 which will be described later. Further, in order to restrict the rotation of the operating side slide block 14 and allow sliding only in the roll axis direction, it is fitted to a fixed block 15 connected to the operating side roll chock 4 using a key, a spline, or the like.

On the other hand, a connecting bolt 16 is removably connected to the end of the drive side roll shaft 10a in the longitudinal direction of the shaft.
A connecting block 17 is coupled to the connecting block 6 for synchronous rotation on the same axis, and a thrust bearing 18 for receiving thrust load during rolling and a radial bearing 19 for receiving radial load are fitted to this connecting block 17. The drive side slide block 2° is mounted via the thrust bearing 18 and the radial bearing 19. This drive-side slide block 2o is provided with a screw that fits into a width adjustment nut 22, which will be described later, and has the same thread pitch as the operation-side slide block described above, but a different direction of thread cutting. Further, a rotation stopper 21 is provided to restrain the rotation of the drive-side slide block 20 and allow sliding only in the roll axis direction.

The operating side slide block 14 and the drive side slide block 20 described above are screwed to a width adjusting nut 22 provided with screws that fit with the screws provided thereon. A chia 23 and a binion 24 are attached to the outer periphery of one end surface of the width adjustment nut 22.
A width adjustment drive device 26 consisting of a motor 25 and a motor 25 is provided.

Note that one end surface of the drive-side roll shaft 10a is a spherical surface r, and a spring 2 is installed between the connecting bolt 16 and the connecting block 17.
7 is included, and by applying a certain force, connecting block 1
7 and the drive-side roll shaft 10a are kept in contact with each other at the spherical surface r.

Further, since the rolls are variable width rolls, a gap is created between the drive side roll cylinder 9a and the operation side roll cylinder 9b, allowing scale and water to enter, so a scale seal 28 is provided between the rolls.

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

In order to change the roll body length W shown in FIG. 2, when the motor 25 is first activated, the pinion 24 and the gear 23 that mesh therewith rotate, and the width adjustment nut 22 or the operation side roll chock 4 rotates. This width adjustment nut 22 is connected to a fixed block 15 fixed to the operating side roll chock 4.
Since movement in the roll axis direction is restrained by the holding plate 29, the operation side and drive side number slide blocks 14 and 20, which are screwed to the width adjustment nut 22 with the same pitch but with different threading directions, are connected to the width adjustment nut 22. Performs relative movement in the roll axis direction. Therefore, this operation side slide block 1
4 is the operating side roll shaft 10b via the thrust bearing 13.
, the drive-side slide block 20 is connected to the drive-side roll cylinder 9b via the thrust bearing 18, the radial bearing 19, the connection block 17, the connection bolt 16, and the drive-side roll shaft 10a. Because they are connected, the roll body length W (rolling width) can be adjusted freely. Note that the screws provided on the inner surface of the width adjusting nut 22 are usually screws in opposite directions, and the pitch of each screw is the same, so that the amount of movement of the driving side roll cylinder 9a and the operating side roll cylinder 9b is the same. In addition, in this invention, the above-mentioned screws can be arranged in opposite directions and have different pitches to enable various relative movements.

Next, a case where the roll and the width adjustment device 26 are separated will be described.

First, the entire roll is placed on a recombination device (not shown).

Then, in order to separate the roll and the width adjustment device 26, (1) When the connection bolt 16 is rotated 90 degrees to separate the connection bolt 16 from the drive-side roll shaft 10a, the force of the spring 27 acts and the connection state is released.

2) Remove the holding plate 29 in order to remove the roll chock 4 and width adjustment nut 22.

3) The drive-side roll shaft 10a, the operation-side roll shaft 10b, and the operation-side roll chock 4 are fixed using a jig (not shown) so that they can be moved in synchronization in the shaft length direction.

4) Remove the rotation stopper 2I. 5) In this state, when the motor 25 is rotated, the width adjustment nut 22 will rotate, and the operating side slide block 14, which engages with the width adjustment nut 22 with a screw, will move to the left, and the threaded part will rotate. When the mesh is disengaged and the device supporting the entire roll (not shown) is moved to the left in this state, the entire width adjustment device 26, drive side slide block, etc. are removed from the roll chock 4.

For assembly, perform the reverse operation.

(Effect of the invention) Thus, according to the present invention, regarding the variable width rolling roll,
It is possible to obtain remarkable effects as described below.

b) Roll width can be changed arbitrarily online by remote control.

Ex) Since the roll width can be shifted by the same amount left and right around the roll center, 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.

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

e) Since the rolls and 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 explanation of the drawing]

Fig. 1 is an explanatory view 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 present invention, and Fig. 3 is a conventional off-line variable width rolling mill. A sectional view of a rolling roll. FIG. 4 is an explanatory diagram of rolling an H-beam steel by a universal rolling mill. 1... Rolled material 2.2'... Variable width rolling roll 3.3'... Drive side roll chock 4.4'... Operating side roll chock 9a... Drive side roll cylinder 9b... Operating side roll cylinder 10a... Drive side roll shaft 10b... Operating side roll shaft 11.12... Radial bearing 13... Thrust bearing 14... Operating side slide block 18... Thrust bearing 19. ...Radial bearing 20...Drive side slide block

Claims (1)

[Scope of Claims] 1. The roll cylinder is divided into a driving side and an operating side, and the roll cylinder is supported by a bearing on each roll chock on the driving side and the operating side, so as to enable relative movement toward and away from each other along the roll axis direction,
In a rolling roll in which a rolling width changing device that controls the above-mentioned relative movement is attached to a roll chock on the operating side, the roll extension shaft of the driving side roll cylinder is passed through the roll shaft hollow neck of the operating side roll cylinder, and the roll width is changed. Fitted together so that they can be inserted and removed in the axial direction and rotated synchronously, the driving and operating sides are restrained from rotating and can only slide in the roll axis direction at the operating side shaft end of each roll shaft on the driving side and operating side. Each slide block was installed via a thrust bearing, and both the drive side and operation side slide blocks were provided with right-hand and left-hand threads with different threading directions, and screws that fit with these screws were provided respectively. A variable width rolling roll characterized by being screwed to a width adjusting nut.