JPS62142009A - Shaping rolling mill for wide flange beam and resembling shape steel - Google Patents

Abstract

PURPOSE:To produce wide flange beams having different flange widths by providing upper and lower shaping rolls inscribed with plural calibers of different depths to right and left sleeves fitted onto arbors freely expandably and contractably in the longitudinal direction of the arbor bodies in such a manner that said rolls can move freely vertically with respect to the pass line. CONSTITUTION:This shaping rolling mill is constituted by fitting a pair of the right and left sleeves 11a, 11b onto the arbors of the upper and lower shaping rolls in such a manner that the sleeves can expand and contract freely in the longitudinal direction of the arbor bodies. The distance X1 between the sleeves 11a, 11b is preliminarily adjusted to obtain the parting distance of the calibers 13a, 13b corresponding to a web height H1 in the case of subjecting a rolling material 5b having a flange width F2 to shaping rolling. The parting distance of the calibers 12a, 12b is set at H1 and the roll chocks are vertically adjusted as much as the increased or decreased component of the width F1 in the case of rolling the rolling material 5a having the same web height H1 and narrow flange width F1. The selective rolling of the wide flange beams having the specified web height and different flange widths with the common shaping rolls is thus made possible.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a shaping rolling process used when rolling a shaped steel having symmetrical flanges on both sides of the web, such as H-shaped steel and ■-shaped steel, by universal rolling. Regarding machines.

(Prior Art) FIG. 3 shows a typical rolling equipment row for manufacturing steel sections such as H-section steel and I-section steel by universal rolling.

In the figure, reference numeral 1 denotes a breakdown rolling mill, which rolls an intermediate-phase rolled material using a slab or a rough-shaped steel piece as a raw material through grooves cut into a pair of upper and lower horizontal rolls. The first intermediate rolling mill 2 has a universal rolling mill 21 and a shaping mill v13 installed in close proximity to each other to enable continuous rolling. It consists of a pair of upper and lower horizontal rolls. This first
In the intermediate rolling mill 2, the intermediate phase rolled material is roughly reverse rolled to obtain an intermediate rolled material. The second intermediate rolling mill 22 includes the universal rolling mill 21 and the shaping rolling mill 3 like the first intermediate rolling mill 2, and rolls the intermediate intermediate rolling material and the intermediate finishing material. 4 is a universal finish rolling mill.

After rolling a predetermined amount of H-section steel 5a with web height Hl and flange width Fl as shown in FIG. 5(A) using such a conventional rolling equipment row, the web height shown in FIG. 5(A) is successively rolled. Ho
When rolling an H-section steel 5b with a flange width of F2, that is, when changing to a size with the same web height but a different flange width, it is necessary to change the rolls if the flange width exceeds a certain allowable range. It was necessary. The reason for this is shown in FIGS. 4(a) and 4(0).
The relationship between this and the shaping rolling mill 3 will be explained below.

The web W of the H shape g15a is rolled down by the horizontal roll 21a, and at the same time the flange f is rolled down by the hard roll 21b.
The end portion f1 of the flange f is not rolled down by the horizontal roll and the vertical roll. Therefore, this flange end f1 is shaped and rolled by the water and sewage upper rolls 3a of the next stage shaping and rolling mill 3, but there is a gap between the web W of the H-beam 5a and the central bulge of the water and sewage upper rolls 3a. d is formed to prevent the occurrence of web deviation during rolling. However, when attempting to roll an H-beam 5b with the same web height Hl as the H-beam 5a and a larger flange width, the universal rolling n, 21 requires a certain degree of flange width increase due to the structural 4 yen requirement. However, in the shaping rolling mill 3, the gap d becomes extremely large, and web deviation is likely to occur. For this reason, conventionally, even if the web height of the H-section steel remained the same, if the flange width changed, the rolls of the shaping rolling mill had to be rearranged at least eight times.

As a rolling equipment array that can accommodate various sizes using the rolls of a common shaping rolling mill, the applicant of the present application has previously published
73'i'f was proposed, but this technology can be applied only to the stage where the flange part has an outwardly opening taper, and the rolling process is applicable only to the stage where the flange part has an outwardly opening taper.
It cannot be used in the shaping rolling mill 3 of the intermediate rolling mill 22, and has the disadvantage that a dedicated guide must be prepared.

(Problems to be Solved by the Invention) In view of the above points, the present invention provides a rolling mill for shaping steel sections that is installed in close proximity to a universal rolling mill to enable continuous rolling, in which the web height is the same using a common shaping roll. The present invention provides a shaping rolling mill that can produce various types of H-shaped steel, ■-shaped steel, etc. with different flange widths, and eliminates the need for roll sets.

(Means for Solving the Problems) FIG. 1 is a schematic diagram of a shaping rolling mill according to the present invention, in which a stand bouncing 6 shown by imaginary lines has a pair of left and right upper roll chocks 7a and a lower roll chock 7b mounted on a rolling screw or It is supported so that its vertical position can be adjusted via a lowering device 8 using a hydraulic cylinder. Said upper and lower roll chock? A and 7b each have a shaping roll 9a.
, 9b are rotatably supported by a drive device (not shown). These two lower shaping rolls 9a, 9
b have the same structure, the following description will be made with respect to the upper shaping roll 9a shown in partial cross section. Upper shaping roll 9a
A pair of left and right sleeves lla and llb are fitted onto the taper 10 so as to be expandable and contractible in the IFI ffl direction of the taper. The means for making the sleeve expandable and contractible with respect to the taper can be any means such as a method using hydraulic pressure as disclosed in JP-A-60-118301, or a one-way screw method. The structure that can be changed in time is ti! Delicious.

Sleeve lla has a depth from the sleeve circumferential surface, h2
Hole shapes 12a and 12b having different diameters are carved, and similarly, hole shapes 12b and 13b are carved in the sleeve 11b at positions symmetrical to the hole shapes of the sleeve lla. The depth of the hole, h2, may be arbitrarily determined depending on the desired flange width of the material to be rolled at the intermediate rolling stage. The upper end surface of the conveying table 14 for the material to be rolled, indicated by a broken line, indicates a pass line, and the height S from the fixed bed 15 is always constant.

(Function) Figures 2(a) and (()) show the relationship between the sleeves Ila and llb of the shaping rolling mill, which are the main components of the apparatus of the present invention, and the intermediate rolled material 5b. A) is a state in which a rolled material 5b with a web height Hl and a flange width F2 is being rolled for shaping.The distance between the grooves 13a and 13b is set in advance by an amount corresponding to the web height Hl of the rolled material 5b. The distance x1 between the left and right sleeves is determined by adjusting A.Next, when rolling the rolled material 5b and the rolled material 5a, which have the same web height Hl and a narrow flange width F1, in succession, as shown in Fig. 2 (C1
), the left and right sleeves 116.degree. 11b are brought close to each other, and the distance between the holes 12a and 12b is set to Hl.

Note that the position of the lower end of the flange is one step lower than the pass line by the amount that the flange width increases or decreases, so the upper roll chock 7a and lower Adjust the roll chock 7b.

(Example/Effect) In the above explanation, one sleeve has two different flange widths.
Although an example in which one mold is carved is shown, two or more types of hole molds may be provided depending on conditions such as the size of the housing and sleeve, the size of the material to be rolled, and the pass schedule. In the experimental example, in the case of H-beam steel, the web height was 300 mm in product dimensions.
, 200mm flange width and 30mm flange width
Can be used in common with 0mm, web height 400mm+,
Even in the case of flange widths of 200, 300, and 400 mm, the purpose could be achieved with one shaping roll.

According to the present invention, it is possible to roll various sizes of H-shaped steel and ■-shaped steel with a constant web height and different flange widths, and there is no need to change the shape within a certain size range, so work efficiency is significantly improved. do.

In addition, since it can be used until the end of its service life than conventional shaping rolls, it has a large effect of reducing roll consumption and preparation rolls.

[Brief explanation of drawings]

Fig. 1 is a schematic partial cross-sectional front view of the device of the present invention, Fig. 2 (a)
, (0) is a partially enlarged view showing details of the configuration of the apparatus of the present invention, FIG. 3 is a schematic diagram showing an example of a universal rolling mill row for sectioned steel, FIG. 4 (a), (01 is a universal rolling mill/shaping machine An explanatory diagram showing the relationship between the rolling mill and the rolled material, Fig. 5 (
A) and (0) are explanatory diagrams of H-beam steel. DESCRIPTION OF SYMBOLS 1... Breakdown rolling mill, 2... Intermediate rough rolling mill, 3... Shaping rolling mill, 4... Universal finishing rolling mill, 5a, 5b... H-shaped steel, 6... Stand Housing, 7a, 7b... Roll chock, 8... Lowering device. 9a, 9b-shaping roll, 10-... arbor, lla,
Ilb - Sleeve, 14... Conveyance table, 21.
...Universal rolling mill, 21a...Horizontal roll, 2
1b... Vertical roll, 22... Intermediate rolling mill.

Claims (1)

[Claims] In a shaping rolling mill for shaped steel, which is installed in close proximity to a universal rolling mill to enable continuous rolling, multiple holes with different depths are cut into a pair of left and right sleeves that are fitted on the outside of the arbor so that they can expand and contract in the longitudinal direction of the arbor. A shaping rolling machine for H-shaped steel and similar shaped steel, characterized in that upper and lower shaping rolls are provided so as to be movable up and down with respect to a pass line.