JPH0618642B2 - Eging rolling machine for profile with flange - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an edging rolling apparatus for a shaped steel having a flange, and more particularly to shaping and forging a flange of various sizes for H-shaped steel and similar shaped steel. The present invention relates to an edging rolling device used in the field of performing.

(Prior Art) Rolling of H-section steel and similar-section steel is generally carried out by a universal rolling mill, and this method is similar to that of a H-shaped steel piece in a breakdown mill 1 shown in FIG. After roughly shaping into a shape, the thickness of the web and the flange is reduced by a universal rolling machine 2 equipped with upper and lower horizontal rolls 2'and left and right vertical rolls 2 ". Further, the width direction of the flange is reduced and forged to reduce the variation in shape and dimension. For correction, an edging rolling mill 3 is installed continuously with the universal rolling mill 2 as shown in FIG.

According to this rolling method, the thicknesses of the web and the flange can be adjusted in a considerable range, and the same roll can be used to roll sizes having different sectional performances.

The layout shown in FIG. 6 is the most typical example, and a plurality of universal rolling mills 2 and edging rolling mills 3 may be arranged.

By the way, the rolling condition of the edging rolling mill 3 is basically based on restraining the web portion 4 by a pair of upper and lower horizontal rolls 5 in the initial pass as shown in FIG. 8, but in the latter pass of FIG. The width of the flange piece of the material to be rolled increases as universal rolling is repeated, so that the clearance S is inevitably generated.

From the basic condition of such edging rolling, existing standard H-beams are domestic as illustrated in Table 1, both abroad standards, the flange piece width F _S of FIG. 10 in each designation Series It is constant, and the flange total width F _T changes as the web thickness T _W changes. This is contradictory to the fact that it is convenient that the full width F _T is constant in each name series in terms of application technology, and it is the current situation that the application field is unreasonable due to technical restrictions of manufacturing. .

Further, as shown in FIG. 9, since the clearance S is present in the latter pass, the position of the web 4 of the material to be rolled is accurately determined by the flange 6
Center position F _T / 2 of the so-called center deviation (We
b Off-center) is likely to occur.

Attempts to build various flange width dimensions by sharing rolls date back to the beginning of the universal rolling method, as shown in Fig. 11 for the hole-roll method and Fig. 12 for the flat roll method. Attempts have been made to induce buckling or deviation of the center, and to prevent the buckling or deviation of the center by using an auxiliary guide device G together as shown in FIG. It is difficult and stable to maintain a stable rolling condition, and under the present circumstances, dedicated edging rolls are used for the production of each designated series.

(Problems to be Solved by the Invention) An object of the present invention is to advantageously eliminate the above-mentioned drawbacks, without changing the roll tool at all.
It is intended to provide an edging rolling device equipped with a device for adjusting the diameter of an edging rolling roll capable of continuously adjusting one side width of a flange on-line.

(Means for Solving the Problems) The present invention advantageously solves the above-mentioned problems, and the gist thereof is a horizontal roll 7 having a web restraint collar 7-1 and a shaft portion 7-2, and A pair of back-up rolls 9 rotatably abutting on the outer peripheral surface of the shaft portion 7-2, and a rolled material flange reduction working roll (10) rotatably abutting on the outer peripheral surface of each backup roll 9; An edging rolling device for a profile having a flange, which has means for displacing the backup roll 9 in a direction intersecting with a straight line connecting the axis of each of the horizontal roll 7 and the flange reduction working roll 10.

The present invention will be described in detail below with reference to the drawings.

FIG. 1 shows a main part of an edging rolling apparatus according to an embodiment of a profile having a flange according to the present invention.

In FIG. 1, 7 is a horizontal roll, which is a split type in this embodiment.

The split-type horizontal roll 7 has a web restraining collar 7-1 that holds the web of the rolled material in contact with the web of the rolled material so that the outer circumferential surface of the rolled material rollably rolls and holds the web of the rolled material in the rolling process, and a shaft portion having a taper. 7-2 and is rotated by the drive shaft 8.

Reference numeral 9 in the drawing denotes a backup roll, and a pair of rolls are in rolling contact with the outer peripheral surface of the shaft portion 7-2 of the split type horizontal roll 7. In addition, the flange roll actuating roll 10 is rotatably supported by contacting with the outer peripheral surfaces of the pair of backup rolls 9. That is, the flange roll working roll 10
Is not driven directly by an independent drive source, but is friction driven via a backup roll 9 that rolls in contact with the outer peripheral surface of the shaft portion 7-2 of the horizontal roll 7 that rotates integrally with the drive shaft 8. There is no hindrance to rolling threadability.

The pair of backup rolls 9 are displaced (opened / closed) in the direction intersecting with the straight line connecting the respective axis of the split type horizontal roll 7 and the flange reduction working roll 10, that is, in the directions of the arrows K and K'in this embodiment. .

Due to the displacement of the backup roll 9 in the directions of the arrows K and K ′, the flange reduction working roll 10 is displaced in the direction of the arrow A.

The displacement of the backup roll 9 in the directions of the arrows K and K ′ is performed by using a roll position adjusting mechanism (rolling down mechanism) known per se such as a normal screw or hydraulic mechanism.

Further, the working roll 10 is preliminarily driven by being brought into contact with the drive roll shaft portion 7-2 via the backup roll 9 with a preload, thereby ensuring smooth rolling of the rolled material.

Further, as shown in the drawing, one roll end surface of the working roll 10 is configured so as to roll in close contact with the side wall of the horizontal roll 7 so that no inconvenience occurs in the reduction and shaping of the flange tip portion. There is.

(Examples) Hereinafter, the present invention will be described based on Examples. In the embodiment shown in FIG. 1, the working roll 10 has the maximum opening in the state shown in FIG. 2, and the minimum opening is in the state shown in FIG.

Therefore, the variable amount of the full width of the flange according to this method is (L _max −L _min ) × 2.

For example, if d ₁ = 200 mm, d ₂ = 200 mm, d ₃ = 400 mm, then L _max = 556 mm, L _min = 400 mm, which is a general H-section size of flange 100.
It is possible to sufficiently deal with the variation range of the total flange width of 300 mm required for manufacturing up to 400 mm.

At this time, the horizontal roll has a diameter d ₄ of 1200 m / m.
Any of the roll specifications can be dealt with without any problems in the structure of the existing rolling equipment and without any problems in terms of strength, durability and processing by the conventional roll manufacturing technology. If it is necessary to further increase the adjustment range, a roll may be constructed as shown in FIG.

In this case, when the roll size is adopted, (L _max −L _min ) × 2 = 400 mm.

In FIG. 1, by online adjusting the backup roll 9 to an appropriate opening for each pass, it is possible to consistently perform complete constraint rolling of the web from all passes from the initial pass to the latter pass. The dimensional accuracy of the deviation of the center, which is particularly problematic in the hot-rolled H-section steel, is improved.

By the way, the edging roll of the present invention has a feature that the roll size corresponding to the width of the flange of H-section steel can be arbitrarily changed in the rolling process. As a result, web restraint collar 7-1
Naturally, the peripheral speed and the peripheral speed of the flange-rolling working roll 10 are different from each other, but the effect of the difference in the peripheral speed on the threadability and its countermeasure will be described.

First, in the example shown in FIGS. 8 and 9, in which the web restraint edging rolling was carried out using a conventional edging roll in which the portions corresponding to the web restraint collar and the working roll for flange reduction of the present invention were integrated, H400 × 400 (web height 400m
In the case of H-shaped steel with m and a flange width of 400 mm), the web-constrained edging rolling could be performed without trouble by using an edging roll having a roll body diameter of 1000 mm and a flange body edging portion of 600 mm. The peripheral speed ratio α in this case is expressed by the following equation.

That is, in the conventional integrated edging roll, it is well known that there is a difference between the peripheral speed of the web restraint portion and the peripheral speed of the flange edging portion, but if the peripheral speed ratio α when performing the web restraint rolling is about 1.66 or less. It means that there is no particular problem.

Now, in the case of the embodiment of the present invention described above, the web restraint roll diameter (d4) is 1200 mm, the flange edging roll diameter (d
Since 3) is 400 mm, the peripheral speed ratio α is 3, and if web restraint rolling is positively performed, there is a concern about threadability. However, in normal rolling, aiming within the tolerance of center deviation,
The roll gap is set to be 1 to 2 mm larger than the web thickness of the rolled material, and the load is not increased so that the web is not positively pressed down. Therefore, even if α = 3, there is practically no problem.

On the other hand, in order to satisfy α ≦ 1.66 in the device of the present invention, it can be dealt with by setting the diameter of each roll and selecting the size of the H-section steel to be applied. For example, flange roll working roll diameter (d1): 50mm Backup roll diameter (d2): 50mm Shaft roll diameter (d3): 600mm Web restraint collar diameter (d4): 1000mm, d4-2L _min = 300mm, d4-2L _max = 215 mm,
For web thickness (tW), (tW + d4-2L _max ~ tW + d4-2L _min )
It can be adjusted within the range of the flange width.

(Effect of the Invention) According to the present invention, since the roll size of the flange equivalent width portion can be arbitrarily adjusted online, H-section steel of any flange size can be rolled, and it is possible to cope with small size production of many sizes and rolls therefor. No replacement work is required, improving production efficiency. Roll tool costs can also be reduced.

Further, even for a specific product, the web-constrained edging rolling can be consistently performed from the initial pass to the latter pass, so that the dimensional accuracy is improved.

Furthermore, the operating rolls with backup rolls installed at four locations can be adjusted independently, respectively, so that they are shown in Figs. 5 (a) and (b).
As described above, it is possible to easily manufacture the H-section steel which is asymmetrical to the left and right or up and down by simply accumulating the asymmetrical reduction for each pass without changing the tool for flange edging.

[Brief description of drawings]

1 (a) and 1 (b) are overall configuration diagrams of the edging roll of the present invention, FIG. 2 is an explanatory diagram showing the maximum opening of the working roll in FIG. 1, and FIG. FIG. 4 is an explanatory view showing the minimum opening of the working roll, FIG. 4 is a configuration diagram of a backup roll for further increasing the maximum opening of the working roll in FIG. 1, and FIGS. The figure which shows the example of the product cross section of the asymmetrical H-section steel which can be manufactured when the invention is applied, and FIG. 6 (a), (b), (c), (d) shows the method of rolling H-section steel. Conventional example, FIG. 7 is a configuration diagram of a universal mill and an edging mill, FIG. 8 is a conceptual diagram of an edging rolling state of an initial pass, and FIG. 9 is a conceptual diagram of a conventional state of an edging rolling of a late pass, Fig. 10 is an explanatory view of the flange-related dimensions of H-section steel, and Figs. 11 (a) and 11 (b) are defective edging rolling patterns by the conventional hole-roll method. 12 (a) and 12 (b) are explanatory views of the situation of defective edging rolling by the conventional flat roll method, and FIGS. 13 (a) and 13 (b) are auxiliary guide devices. It is explanatory drawing of the defective edging rolling condition used together. 1: Breakdown mill, 2: Universal rolling mill, 3: Edging rolling mill, 4: Web, 5: Horizontal roll, 6: Flange, 7: Divided horizontal roll, 8: Drive shaft, 9: Backup roll, 10: Working roll for flange reduction.

Claims (1)

[Claims] 1. A web restraint collar (7-1) and a shaft portion (7-2).
With a horizontal roll (7), a pair of backup rolls (9) rotatably abutting the outer peripheral surface of the shaft portion (7-2), and a rollable outer peripheral surface of each backup roll (9). Displace the rolling roll flange reduction working roll (10) in contact with the horizontal roll (7) and the backup roll (9) in a direction intersecting with a straight line connecting the respective axial centers of the flange reduction working rolls (10). Edging and rolling apparatus for a profile having a flange, which comprises: