JPH0732923B2 - Variable width rolling roll - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is convenient when applied to a universal rolling machine, particularly a horizontal roll, used when rolling, for example, an H-shaped steel having a web and a flange. The present invention relates to a rolling roll having a good roll width.

The H-section steel will be described below as an example.

(Prior Art) For rolling H-shaped steel, a mechanism is adopted 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.
So-called universal rolling mills are used. Conventionally, in the case of manufacturing H-section steel with such a rolling mill, if the flange width of the H-section steel is smaller than the roll width of the hard roll, the size can be freely changed within that range. In the case of (H), when the roll width of the horizontal roll is w and the flange thickness is t, H = w + 2t ₁ is usually satisfied, so that there is a problem as described below.

1). Since the inner surface of the flange of the material to be rolled is rolled down and rolled by the roll end surface of the horizontal roll, the wear on that part is severe, and even within the same rolling chance, the height of the web becomes insufficient as the amount of rolling increases, so it is constant. It was not possible to consistently obtain a shaped steel product of a size, and in order to avoid this, frequent replacement of horizontal rolls was required.

2). In an ordinary universal rolling mill, the flange width of the shaped steel can be freely changed, but the height of the web is one size for one roll, and it was necessary to prepare a large number of rolls for the change.

3) When H = w + 2t ₁ of H-section steel, there are several types of H-section steels with a constant outer rectangular shape, where the web height is constant. It is necessary to change the roll width of the roll so that it has the desired flange thickness, but in order to deal with this, it is necessary to frequently change the rolls, which hinders productivity and increases the man-hours for changing the rolls. In addition to being forced to, many roles must be held.

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 the horizontal roll with the inner rectangular dimension of H-section steel, resulting in a significantly higher roll unit (see Fig. 4). .

As techniques for attempting to solve the above conventional problems, reference is made to, for example, JP-A-61-262407, JP-A-62-176604 and JP-A-62-156007.

(Problems to be solved by the invention) In order to improve the quality of H-section steel, respond to new products or improve productivity, it is unavoidable to use variable width rolling rolls that can be applied online in the field of rolling section steel. However, since all such rolls have a mechanism in which the roll slides on the axis of the roll shaft main body, the roll cooling water or scale or dust generated during rolling is on the slide surface. There is a possibility that rust may occur upon entering and corrosion may occur, and a technique for avoiding these problems is not known so far. It is an object of the present invention to propose a variable width rolling roll that can prevent roll cooling water and scale from entering, and that has a relatively simple prevention mechanism and can easily disassemble and assemble during maintenance. .

(Means for Solving the Problem) The present invention is to hold at least one of an operation side roll and a drive side roll that controls the reduction of a material to be rolled directly on a roll shaft main body or via a sleeve roll, and directly hold the other roll. Alternatively, the roll width is held by a sleeve roll so that the roll shaft main body can be moved back and forth along the roll shaft main body, and at least one of the operation side roll and the drive side roll is moved along the axis of the roll shaft main body to change the roll width. In the rolling roll, the partitioning recesses are provided on the facing surfaces of the operation-side roll and the driving-side roll, and the slide rings that extend between the rolls and have projections at both ends thereof are provided in the partitioning recesses. However, each roll is fixedly held on one side of this slide ring, and a very small gap is formed with the slide ring. A variable width rolling roll is characterized in that a water draining plate is installed, and a contact type seal member that eliminates a gap between the slide ring and each roll is installed on the opposite surface.

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. Number 1 in the figure is a material to be rolled which is an H-shaped steel product having a web and a flange, and 2a and 2b are Hard rolls that roll down the outer surface of the flange of the material to be rolled 1, 3a and 3b are chocks that pivotally support the hard rolls 2a and 2b, and 4a and 4b are connected at one end to a roll drive device that transmits the torque required for rolling. Yes, it is a pair of upper and lower horizontal rolls whose roll width can be changed.

Hereinafter, for convenience of description of the above horizontal rolls, the left side in FIG. 1 is the driving side connected to the driving device, the right side is the operating side, and the upper and lower horizontal rolls have exactly the same structure, so only the upper roll 4a will be described. To do.

In a sleeve roll having a two-part structure including a driving side roll L _R and an operating side roll R _R for subjecting the web of the material to be rolled 1 and the inner surface of the flange to rolling, the sleeve roll 5a fixedly holding the operating side roll R _R is A through hole h is provided in the center and is rotatably supported in a cantilever manner via a bearing 7 (for radial load) and a bearing 8 (for thrust load) fixed to a chock 6 of the rolling mill.

The sleeve roll 5b fixedly holding the driving roll L _R has a through hole h'in its center and is shrink-fitted to the roll shaft body 9.

The drive-side shaft end of the roll shaft main body 9 is rotatably supported by a chock 12 fitted to a housing 11 via a bearing 10, while the other end side region holds the operation-side roll R _R fixedly. It fits into the through hole h of the sleeve roll 5a, and is splined by the groove formed on the inner surface of the through hole h and the corresponding tooth formed on the outer surface of the roll shaft body 9. A sleeve roll in which the operating-side roll R _R is fixedly held by the operation of a drive device connected to the roll shaft main body 9
5a rotates together with the driving-side roll L _R to roll the material 1 to be rolled.

Further, numeral 13 in the figure is a pressing means which is screwed and coupled to the roll chock 6, and this pressing means 13
Has a gear portion T around the outer surface of the support case S that engages with a rotating device (not shown), and has an opening d inside the gear portion T that engages with the shaft end 9a of the roll shaft body 9.
And a slide block 15 that rotatably holds the arbor 14 via bearings e (which receive the thrust load of the roll shaft body) and f, a nut housing box 16 fixed to the support case S, and a deceleration inside the housing box 16. A drive source 17 such as an electric motor with a machine is rotatably supported via a clutch 18,
The slide block 15 is provided with a nut 19 to be screwed.

Reference numeral 20 is a pin that prevents the slider block 15 from rotating.

The rotation of the nut 19 causes the slide block 15 to slide along the inner surface of the support case S and move together with the roll shaft main body 9 toward the drive side of the rolling mill, thereby expanding the roll width. When reducing the roll width,
First, by rotating the nut 19, the slide block 15 is retracted to the drive source 17 side together with the arbor 14, and then the pressure in the hydraulic chamber 21 is increased to engage with the roll shaft body.
Press 22. The hydraulic chamber 21 serves not only to change the width of the roll but also to prevent rattling of the roll shaft body 9 and elastic strain.

The variable width roll having the above-mentioned configuration is an example thereof and is not limited to this. For example, the variable width roll may have a structure as shown in FIG. During the rolling process, the operating side roll R _R and the driving side roll L _R
Roll cooling water and scales enter between and, and rust and corrosion are unavoidable. Therefore, in the present invention, partition recesses g and g'are provided in the facing surfaces of the operation side roll R _R and the drive side roll L _R , respectively, as shown in FIG. The rolls extend in the recesses g and g'between the rolls, and the protrusions i and i '
A slide ring 23 having a slide ring 23 is installed on one surface of each of the rolls R _R , L _R via fastening means such as bolts.
And draining plates 24 and 25 that form very small gaps t and t ', and a contact type seal that eliminates the gap between slide ring 23 and rolls R _R and L _R on the opposite surface. It was decided to install members (φ ring, etc.) 26 and 27.

(Operation) The slide ring 23 arranged between the operation-side roll R _R and the drive-side roll L _R is not fixed to the roll shaft main body 9, but is freely movable along its axis. it can. Here, for example, when the driving-side roll L _R moves in the direction of the arrow to increase the roll width, especially when the seal member
When the contact force with 26 is larger than that of the seal member 27, it moves in the direction of the arrow together with the driving-side roll L _R , but the width of the roll can be changed until the draining plate 24 contacts the protrusion i of the slide ring 23. It is possible. The roll width change range (stroke) is from the protrusion i of the slide ring 23 to the protrusion i '. In the variable width roll having such a configuration, the first-stage sealing is performed with the very small gaps t and t ′ formed by the slide ring 23 and the draining plates 24 and 25, and the slide ring 23 and Since the second-stage sealing is performed by the seal members 26, 27 such as φ-rings, even if roll cooling water or scale enters during this period, it may reach the roll surface of the roll shaft body 9. Therefore, the roll sliding surface of the roll shaft body 9 is not rusted or corroded. The broken line portion shown in FIG. 3 above shows an example of the movement of the slide plate when the roll width is enlarged.

(Effect of the Invention) Thus, according to the present invention, it is possible to completely prevent the entry of the roll cooling water, the scale, and the like from the gap of the roll, and thus it is possible to completely prevent the deterioration of the rolling equipment due to this. Further, since the structure is relatively simple, disassembling and assembling the rolling rolls can be performed in a short time during maintenance of the rolling mill, which greatly contributes to reduction of man-hours and labor saving.

[Brief description of drawings]

FIG. 1 is a configuration explanatory view of a rolling roll according to the present invention. FIG. 2 is a diagram showing another example of the rolling roll according to the present invention. FIG. 3 is an enlarged sectional view of an essential part of the rolling roll according to the present invention. The figure shows the rolling condition of H-section steel. 1 ... Rolled material 2a, 2b ... Hard roll 3a, 3b ... Roll chock 4a, 4b ... Horizontal roll 5 ... Sleeve roll 5a, 5b ... Drive side roll, operating side roll 6 ... Operating side roll chock 7,8 ... Operating side roll Bearing, 9 ... Roll shaft main body 9a ... Shaft end, 10 ... Drive side bearing 11 ... Housing 12 ... Drive side roll chock 13 ... Width varying means, 14 ... Arbor 15 ... Slide block, 16 ... Nut storage box 17 ... Drive source, 18 … Clutch 19… Nut, 20… Pin 21… Hydraulic chamber, 22… Sleeve 23… Slide ring 24,25… Drainer plate 26,27… Contact type seal member e, f… Bearing

Claims (1)

[Claims] 1. At least one of an operating side roll and a driving side roll that controls the reduction of a material to be rolled is fixedly held on a roll shaft body directly or via a sleeve roll, and the other roll is directly or via a sleeve roll. A rolling roll that holds a roll shaft main body so as to be movable back and forth along the roll shaft main body, and moves at least one of the operation side roll and the drive side roll along the axis of the roll shaft to make the roll width variable, Partitioning recesses are provided on the facing surfaces of the side rolls and the driving side rolls, and slide rings that extend between the rolls and have projections at both ends are arranged in the partitioning recesses, and one side of this slide ring is provided. Installs a draining plate that is fixedly held on each roll and forms a very small gap with the slide ring, and vice versa. A variable width rolling roll characterized in that a contact-type sealing member that eliminates a gap between the slide ring and each roll is installed on the surface.