JPH03142005A - Variable width rolling roll - Google Patents

Abstract

PURPOSE:To prevent cooling water and scale from penetrating from a gap by providing respective partitioned recesses on the facing surfaces between rolls on an operating side and on a driving side in rolling rolls having a variable roll width each and besides providing a slide ring and a dewatering plates on them. CONSTITUTION:A 1st sealing is performed at very small gaps t, t' formed by the slide ring 23 and the dewatering plates 24, 25. 2nd sealing is performed by the slide ring 23 and contact type sealing members 26, 27. Accordingly, though roll cooling water or scale, etc., penetrates the gap, it does not reach the roll surface of the roll axis body 9, no rust or no corrosion is generated on the sliding surface of the roll of the roll axis body 9. In this way, the rolling equipment can be prevented from degradation.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention is particularly useful for horizontal rolls of universal rolling mills used when rolling H-section steel having webs and flanges. This invention relates to a rolling roll with variable roll width. .

The explanation will be given below by taking H-beam steel as an example.

(Conventional technology) For rolling H-beam steel, a mechanism is used in which a pair of upper and lower horizontal rolls and a pair of left and right vertical rolls are incorporated into the same stand.
A so-called universal rolling mill is used. Conventionally, when manufacturing H-shaped steel using such a rolling mill, the flange width of the H-shaped steel can be freely changed within that range as long as it is smaller than the roll width of the vertical roll, but the web height of shaped copper products (H) usually has the following equation, where W is the roll width of the horizontal roll and L is the flange thickness, so that H=w+2 t+, which causes the following problem.

1) Since the inner surface of the flange of the material to be rolled is rolled down with the roll end face of the horizontal roll, there is severe wear in that area, and even within the same rolling chance, the web height becomes insufficient as the amount of rolling increases. As a result, it was not possible to stably obtain shaped steel products of a certain size, and to avoid this, the horizontal rolls had to be replaced frequently.

2) 1 In a normal universal rolling mill, the flange width of the section steel can be changed freely, but the web height is 10-1 size, so it was necessary to prepare a large number of rolls to change it. .

3) H-beam steel H = w + 2 t I The web height is constant, so-called H-shape steel with a constant outer rectangle has several types with different flange thicknesses even if they have the same nominal size. It is necessary to change the roll width of the horizontal roll as appropriate to achieve the desired flange thickness, but in order to deal with this, frequent reshuffling of the rolls is required, which may impede productivity or reduce the number of man-hours required for reshuffling the rolls. In addition to being forced to increase the number of roles, it is also necessary to hold many roles.

4) In order to improve the dimensional accuracy of shaped steel products, it is necessary to perform frequent processing to match the roll width of horizontal rolls to the inner rectangular dimensions of H-shaped steel, resulting in a significantly higher roll consumption rate (No. 4). (see figure).

Techniques that attempt to solve the above-mentioned conventional problems include, for example, Japanese Unexamined Patent Publication Nos. 61-262407 and 62-176.
No. 604 or Japanese Unexamined Patent Application Publication No. 156007/1984 are referred to.

(Problem to be solved by the invention) Due to demands for improving the quality of H-section steel, responding to new products, and improving productivity, the field of rolling section steel has been forced to use variable-width rolling rolls that can be applied online. However, all of these rolls have a mechanism in which the roll slides on the axis of the roll shaft body, so the sliding surface is free from roll cooling water and scale or dust generated during rolling. There is a risk that rust or corrosion may occur due to the intrusion, and there is currently no known technology to avoid these problems. It is an object of this invention to propose a variable width rolling roll that can prevent the ingress of roll cooling water and scale, has a relatively simple mechanism for preventing this, and can be easily disassembled and assembled during maintenance. .

(Means for Solving the Problems) This invention fixes and holds at least one of the operation side and drive side rolls that control rolling of the material to be rolled directly to the roll shaft body or via a sleeve roll, and the other roll directly Alternatively, the roll width can be varied by holding the roll shaft body through a sleeve roll so as to be movable forward and backward along the roll shaft body, and moving at least one of the operating side roll or the driving side roll along the axis of the roll shaft body. In the rolling roll, partitioned recesses are provided on the opposing surfaces of the operation side roll and the driving side roll, respectively, and a slide ring extending between each roll and having protrusions at both ends is arranged in the partitioned recess. On one side of this slide ring, a drainage plate is installed, which is fixedly held on each roll and forms an extremely small gap between it and the slide ring, and on the other side, a drain plate is installed between the slide ring and each roll. This is a variable width rolling roll characterized in that a contact type sealing member is installed to eliminate gaps between the rolls.

FIG. 1 shows an example in which a variable width roll according to the present invention is incorporated into a horizontal roll of a universal rolling mill. In the figure, number 1 is a material to be rolled that becomes an H-shaped steel product having a web and a flange, and 2a2b is a material to be rolled. The vertical rolls 3a and 3b that roll down the outer surface of the flange of the material 1 are the vertical rolls 2a and 2.
The chocks 4a and 4b, which respectively support the rolls b, have one end connected to a roll drive device that transmits the torque necessary for rolling, and are a pair of upper and lower horizontal rolls whose roll width can be changed.

Hereinafter, for convenience of explaining the above-mentioned horizontal rolls, the left side in FIG. 1 will be referred to as the drive side connected to the drive device, and the right side will be referred to as the operation side. Also, since the structure of the upper and lower horizontal rolls is exactly the same, only the upper roll 4a will be described. do.

In a sleeve roll having a two-part structure including a drive side roll L for rolling down the web and flange inner surface of the material to be rolled 1 and an operation side roll R8, the operation side roll R is
The sleeve roll 5a that holds R fixedly has a through hole in its center, and can be rotated freely on one side through bearings 7 (for radial load) and bearing 8 (for thrust load) fixed to the chock 6 of the rolling mill. It is supported.

Sleeve roll 5b that is rolled on the driving side and holds l fixedly
has a through hole h' in its center and is shrink-fitted to the roll shaft body 9.

The driving side shaft end of the roll shaft body 9 is rotatably supported by a chock 2 fitted to the housing 11 via a bearing 10, while the other end area is connected to the operating side roll R+.
It is fitted into a through hole of the sleeve roll 5a which holds the sleeve t fixedly, and is spline-coupled by grooves formed on the inner surface of the through hole and corresponding teeth formed on the outer surface of the roll shaft body 9.

Here, a sleeve roll 5a holds the operation side roll R7 fixedly by the operation of a drive device connected to the roll shaft main body 9.
rotates together with the drive-side roll L to roll the material 1 to be rolled.

Further, the numbered part 3 in the figure is a pressing means that is screw-fitted and connected to the roll chock 6, and this pressing means 13 is a gear part that engages with a rotating device (not shown) around the outer surface of the support case S. The arbor 14 has an opening d on the inside that engages with the shaft end 9a of the roll shaft body 9, and the arbor 14 is rotatable via bearings e (receiving the thrust load of the roll shaft body) and f. A slide block 15 is held in the slide block 15, a nut storage box 16 is fixed to the support case S, and within this storage box 16, a drive source 17 such as an electric motor with a speed reducer is rotatably supported via a clutch 18, and the slide A nut 19 is provided which is screwed onto the block 15.

Further, 20 is a bottle that prevents the slider block 15 from rotating.

By rotating the nut 9, the slide block 15 slides on the inner surface of the support case S and moves together with the roll shaft body 9 toward the drive side of the rolling mill, thereby expanding the roll width. To reduce the roll width, first rotate the nut 19 to reduce the slide block 1.
5 is retreated together with the arbor 14 toward the drive source 17, and then the pressure in the hydraulic chamber 21 is increased to press the sleeve 22 engaged with the roll shaft body. In addition, the above hydraulic chamber 2
In addition to being useful for changing the width of the roll, I also serves as a means to prevent the roll shaft body 9 from wobbling or from generating elastic strain.

The variable width roll having the above structure is shown as an example, and is not limited to this. For example, the variable width roll having the structure shown in FIG. 2 may be used. In the rolling process No. 1, roll cooling water and scales enter between the operation side roll R1 and the We side roll Lx, and the occurrence of mackerel and corrosion in that area is unavoidable. Therefore, in this invention, as shown in FIG. 3 in an enlarged manner, the operating side roll R1l and the driving side roll LIL are
Compartment recesses g and g' are provided on the opposing surfaces of the rolls, respectively, and a slide ring 23 that extends between the rolls and has protrusions i and i' at both ends thereof is installed in the division recesses g and g'. However, on one side of the slide ring 23, there is a water cutter that is fixedly held on each roll R11, LR through fastening means such as bolts, and that forms extremely small gaps t, t' between the slide ring 23 and the slide ring 23. Plate 24.2
5, and the slide ring 23 and each roll R on the opposite side.
It was decided to install contact-type sealing members (such as φ rings) 26 and 27 to eliminate the gaps between ++ and Lm.

(Function) The slide ring 23 disposed between the operation side roll R8 and the drive side roll L is not fixed to the roll shaft body 9, but can freely move along its axis. can. Here, for example, when the drive side rolls L and 1 move in the direction of the arrow and the roll width is expanded, especially when the contact force with the seal member 26 is larger than that of the seal member 27, the drive side roll LR However, the width of the roll can be changed until the draining plate 24 comes into contact with the protrusion i of the slide ring 23. Note that the roll width change range (stroke) is from protrusion i to i' of slide ring 23. In the variable width roll configured as described above, the first stage sealing is performed in the extremely small gap tt' formed by the slide ring 23 and the drain plate 24, 25, and the slide ring 23 and the φri Since the second stage sealing is performed by the sealing members 26 and 27, even if roll cooling water or scale enters during this time, it will not reach the roll surface of the roll shaft body 9. Therefore, the roll sliding surface of the roll shaft body 9 will not suffer from cracking or corrosion.

The broken line portion shown in FIG. 3 above shows an example of the movement of the slide plate when the roll width is expanded.

(Effects of the Invention) Thus, according to the present invention, it is possible to completely prevent roll cooling water, scale, etc. from entering through the gaps between the rolls, thereby completely preventing deterioration of the rolling equipment caused by this. Furthermore, since the structure is relatively simple, the rolling rolls can be disassembled and assembled in a short time when maintaining the rolling mill, which greatly contributes to reducing man-hours and saving labor.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the configuration of a rolling roll according to the present invention. FIG. 2 is a diagram showing another example of the rolling roll according to the invention. FIG. 3 is an enlarged cross-sectional view of the main parts of the rolling roll according to the invention. The figure shows the rolling status of H-shaped copper. 1... Rolled materials 2a, 2b... Vertical rolls 3a, 3b... Roll chocks 4a, 4b... Horizontal rolls 5... Sleeve rolls 5a, 5b... Drive side roll, operation side roll 6 ...
Roll chock on operating side 7.8 Bearing on operating side 9... Roll shaft body 9
a... Shaft end 10... Drive side bearing 11
... Housing 12 ... Drive side roll chock 13 ... Width variable means 14 ... Arbor 1
5...Slide block 16...Nut storage box 17...Drive source 18...Clutch 1
9... Nando's 20... Bin 21...
・Hydraulic chamber 22...Sleeve 23...
Slide rings 24, 25...Draining plates 26, 27...Contact type seal members e, f...Bearings are 3rd Figure 23 Slide 1 non-stick

Claims (1)

[Claims] 1. At least one of the operation side and drive side rolls that control rolling of the material to be rolled is fixedly held to the roll shaft body directly or via a sleeve roll, and the other roll is fixed to the roll shaft body directly or via a sleeve roll. A rolling roll that is held on the roll shaft main body so as to be movable forward and backward along the roll shaft, and the roll width is made variable by moving at least one of the operating side roll or the driving side roll along the axis of the roll shaft. A partition recess is provided in each of the opposing surfaces of the operation side roll and the drive side roll, and a slide ring extending between each roll and having protrusions at both ends thereof is disposed in the partition recess, and this slide ring A drain plate is installed on one side of the slide ring, which is fixedly held on each roll and forms an extremely small gap between the slide ring and the slide ring, and on the other side, a drain plate is installed to eliminate the gap between the slide ring and each roll. A variable width rolling roll characterized by being equipped with a contact type seal member.