JPH0618643B2 - Edge rolling equipment for H-shaped and similar shapes - 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 wrought rolling of flanges 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 high precision rolling.

(Prior Art) Generally, rolling of H-section steel and similar-section steel is carried out by a universal rolling mill. This method uses a breakdown mill 1 shown in FIG. After rough shaping, the thickness of the web and the flange is reduced by a universal rolling mill 2 equipped with upper and lower horizontal rolls 2a and left and right vertical rolls 2b. Further, the edging rolling mill 3 is installed continuously with the universal rolling mill 2 as shown in FIG. 8 in order to reduce the forging in the width direction of the flange and correct the variation in shape and dimension.

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

The layout shown in FIG. 7 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 such that the web portion 4 is restrained by a pair of upper and lower horizontal rolls 5 in the initial pass as shown in FIG.
In the latter pass of FIG. 10, the width of the flange piece of the material to be rolled increases as the universal rolling is repeated, so that the clearances S and S'are inevitably generated.

These clear lances S and S'are the reduction and the width expansion difference caused by the temperature change, the steel type change, or the difference in product thickness or thickness.
Further, it is indispensable as an adjustment allowance for changes in rolling conditions, such as correction of the pass schedule for load redistribution, or an adjustment allowance for roll wear. In the conventional method, not only the reverse type multi-pass mill but also 1 stand 1
Clearance S, S'is inevitable even in a pass type continuous rolling mill, and is generally set to S, S'≥1 mm.

Based on the basic conditions of such edging rolling, the existing standards for H-section steels are, as illustrated in Table 1, both domestic and foreign standards in each nominal series, the flange piece width F _{S of} FIG.
Is constant, and the flange width F _T changes as the web thickness T _W changes. This is contradictory to the fact that it is convenient for the full width F _{T to} be constant within each name series in terms of application technology, and it is currently impractical for the application field due to technical constraints of manufacturing. is there.

Further, as shown in FIG. 10, because of the clearances S and S ', the position of the web portion 4 of the rolled material does not exactly become the center position F _T / 2 of the flange 6, and the so-called center deviation (Web Off- c
prone to enter).

Attempts to build various flange width dimensions by sharing rolls date back to the beginning of the universal rolling method, but Fig. 12 for the hole-type roll method and Fig. 13 for the flat-roll method.
As shown in the figure, an attempt is 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. However, all of them have failed because it is difficult to maintain a stable and good rolling state, and at the present time, dedicated edging rolls are used for the production of each designation series.

The present applicant has previously filed Japanese Patent Application No. Sho 60 for solving these problems.
-218742 proposed a backup roll bearing type edging rolling mill. However, in the present invention, there is no concrete measure for guaranteeing the biting property of the material to be rolled, and there is still a problem regarding the peripheral speed difference between the backup roll and the web restraint collar.

(Problems to be Solved by the Invention) The present invention has been made to solve the above-described drawbacks, and one-sided adjustment of the flange width can be continuously performed online without changing the roll tool. The present invention provides a new edging rolling device which can be applied to products having the above web height, has a better biting property, and does not cause the problem of the peripheral speed difference between the constituent rolls.

(Means for Solving Problems) The present invention advantageously solves the above problems, and its gist is (1) the web restraint collar 7-1 is rotatably attached to the shaft portion 7-2. An externally fitted horizontal roll 7, a pair of backup rolls 9 rotatably abutting on the outer peripheral surface of the shaft portion 7-2, and a rolled material flange rotatably abutting the outer peripheral surface of each backup roll 9 H-shaped and similar shapes comprising a reduction working roll 10 and 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. (2) The outer peripheral surface of the backup roll 9 contacts the shaft portion 7-2 forcibly driven via the drive shaft 8 by applying a pressurizing force, and the backup roll 9 Of the shaft 7-2
And an edging rolling device for H-shaped and similar shaped members configured so that only the side end surface 9-a on the contact side with the shaft portion 7-2 abuts, and (3) the outer circumference of the rolled material flange pressing working roll 10. The surface is made to come into contact with the shaft portion 7-2 via the backup roll 9 by applying a pressing force, and the side end surface 10-a of the outer peripheral surface on the flange pressure side of the working roll 10 is configured to be rollable. An edging rolling device for a profile having a flange configured to come into contact with the web restraint collar 7-1.

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 pair of left and right split types in this embodiment. The pair of left and right split-type horizontal rolls 7 have their outer peripheral surfaces rotatably abutted against the web of the rolled material, and in the rolling process, hold the web of the rolled material by webbing collars 7-1 and taper. The shaft portion 7-2 has the shaft portion 7-2, and the shaft portion 7-2 is externally fitted to the drive shaft (roll main shaft) 8 and is given a rotational force in the axial direction by the key 50.

The horizontal roll 7 is provided so that the left and right relative intervals in the axial direction of the roll main shaft 8 (direction of arrow P) can be adjusted. Although a drive mechanism for adjusting the relative distance is not particularly shown, any known means such as a hydraulic cylinder system operated by a hydraulic branch pipe provided in the roll main shaft 8 or a screw system can be adopted.

A web restraint collar 7 is formed on the outer periphery of the shaft portion 7-2 via a bearing 40.
-1 is mounted rotatably. That is, the web portion of the material to be rolled is restrained and rolled by the outer peripheral surface of the web restraint collar 7-1, but the web restraint collar 7-1 is in contact with the web portion, and the flange end of the rolled material is edged. Since the flange-rolling working roll 10 to be rolled rotates following the rotational drive, there is no difference in peripheral speed between the web restraint collar 7-1 and the flange-rolling working roll 10. As a result, the concept of problems such as scratches on the rolled material due to the difference in peripheral speed, scratches on the rolled material, seizures on the roll, and defective threading is fundamentally eliminated. The web restraint collar 7-1 is integrally set with the left-right distance in association with the adjustment movement of the left-right distance of the shaft portion 7-2.

Reference numeral 9 in the drawing denotes a backup roll, which rotatably supports the flange reduction working roll 10 in a pair.

The pair of backup rolls 9 are in a direction intersecting with a straight line connecting the respective axis centers of the split horizontal roll 7 and the flange reduction working roll 10, that is, the arrow K, in this embodiment.
It is displaced (opened / closed) in the K'direction. Due to the displacement of the backup roll 9 in the directions of the arrows K and K ′, the flange roll actuation 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 made by using a roll position adjusting mechanism (rolling down mechanism) known per se such as a normal screw or hydraulic mechanism.

The working roll 10 is a backup roll 9 with a preload.
It is preliminarily driven by being pressed into contact with the drive roll shaft portion 7-2 via the, so that smooth rolling threading is guaranteed.

As shown in FIG. 2, the backup roll 9 is configured so that only the side end surface 9-a with the shaft portion 7-2 contacts the shaft portion 7-2. Furthermore, the flange roll-down side outer peripheral surface 10-b of the working roll 10 has a side end surface.
The 10-a is configured so as to be in close contact with the side wall of the web restraint collar 7-1 which is configured to be rollable, and is devised so as not to cause inconvenience in the reduction and shaping of the flange tip portion.

(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. 3, 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 steel size flange width 100 to 4
Range of change in the total flange width required to manufacture 00mm 30
It is possible to cope with 0 mm.

At this time, the diameter d _{4 of the} horizontal roll is 1200 mm. All roll specifications have no problems with the existing rolling equipment configuration,
Further, the conventional roll manufacturing technique can be applied without any problem in strength, durability and processing. When it is necessary to further widen this adjustment range, a roll may be constructed as shown in FIG.

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

In Fig. 2, the side wall inclination angle γ of the horizontal roll 7 (web restraint collar 7-1 and shaft portion 7-2) is determined by the equipment and operating conditions of universal rolling, and is usually designed in the range of 3 to 10 °. It At this time, the inclination angle of the contact surface of the shaft portion 7-2 with the backup roll 9 is γ + α. The contact portion between the backup roll 9 and the working roll 10 is a simple cylindrical roll, but the side wall 10-a of the working roll 10 is a truncated cone inclined by an angle α over the length l as shown in FIG. is there. The length l is less than half the roll diameter d ₁ of the working roll 10, It is desirable to select within the range.

The side end surfaces of the shaft portion 7-2 and the backup roll 9 are configured to come into contact with each other at the side end surface 9-a on the side of contact with the shaft portion 7-2. When each roll is constructed as described above, the rotation of each contact portion becomes smooth, and the shaft portion 7-2 and the backup roll 9 by the drive shaft 8 are rotated.
The smooth driving of the working roll 10 through the rotation of the above can be achieved while ensuring the close contact with the side wall of the web restraint collar 7-1.

The working roll 10 is brought into contact with the backup roll 9 with a proper pressurizing force, and the side end surface 10-a of the working roll 10 has a proper pressurizing force and the web restraint collar 7-1.
The positive pressing force can be achieved by a known pressing force applying mechanism such as a spring or hydraulic pressure.

Here, the angle α, which is also the relative shaft inclination angle of the working roll 10, is about 1 degree, and the flange tip 12a is
It is formed at an angle of 0 ° -α. This is due to the pulling action of the horizontal roll toward the web side of the flange by the subsequent universal rolling and the inclination angle of the flange tip 12a due to the widening action of the vertical roll on the outside of the flange. It becomes an element to correct the change of, and is rather practically convenient.

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.

(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 multi-size small-quantity production, and for that purpose. Roll replacement work is also unnecessary, 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.

In edging rolling with web restraint, there is no difference in roll peripheral speed between the web portion and the flange portion, so rolling is performed smoothly and the surface quality of the product is good.

Furthermore, the operating rolls with backup rolls installed at four locations can be adjusted individually, respectively, so that they are shown in Figs. 6 (a) and 6 (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]

FIGS. 1 (a) and 1 (b) are overall configuration diagrams of an edging rolling roll according to an embodiment of the present invention, and FIG. 2 is a relative position of a split type horizontal roll, a backup roll and a flange reduction working roll in FIG. 3 is an explanatory view showing the contact relationship, FIG. 3 is an explanatory view showing the minimum opening of the working roll in FIG. 1, and FIG.
1 is an explanatory view showing the maximum opening of the working roll in FIG. 1, FIG. 5 is a configuration diagram of a backup roll for further increasing the maximum opening of the working roll in FIG. 1, FIG.
(a), (b) is a diagram showing an example of a product cross section of an asymmetrical H-section steel that can be manufactured when the present invention is applied, and FIGS. 7 (a), (b), (c),
(d) is a conventional example of a method for rolling H-section steel, Fig. 8 is a configuration diagram of a universal mill and an edging mill, Fig. 9 is a conceptual diagram of an edging rolling state in an initial pass, and Fig. 10 is an edging in a late pass. Fig. 11 is a conceptual diagram showing the conventional state of rolling, Fig. 11 is an explanatory diagram of dimensions related to flanges of H-section steel, and Figs. 12 (a) and 12 (b) are explanatory diagrams of defective edging rolling conditions by the conventional hole-roll method. Fig. 13 (a), (b) is an explanatory view of the defective edging rolling situation by the conventional flat roll method, and Fig. 14 (a), (b) is the defective edging rolling situation using an auxiliary guide device together FIG. 1 ... Breakdown mill, 2 ... Universal rolling mill, 2a
... Upper and lower horizontal rolls, 2b ... Left and right vertical rolls, 3 ... Edging rolling mill, 4 ... Web part, 5 ... Horizontal roll, 6 ... Flange, 7 ... Split horizontal roll, 7-1 ... Web restraining collar, 7
-2 ... Shaft part, 8 ... Drive shaft, 9 ... Backup roll, 10 ...
Working roll for flange reduction, 12 ... Rolled material, 12a ... Flange tip, 40 ... Bearing, 50 ... Key.

Claims (3)

[Claims] 1. A horizontal roll (7) having a web restraining collar (7-1) rotatably fitted onto a shaft portion (7-2) and rolling on an outer peripheral surface of the shaft portion (7-2). A pair of backup rolls that abut freely
(9) and the rolls for rolling down the rolled material flange, which rollably contact the outer peripheral surfaces of the backup rolls (9) (10)
And a means for displacing the backup roll (9) in a direction intersecting a straight line connecting the respective axial centers of the horizontal roll (7) and the flange reduction working roll (10) Shaped edging rolling equipment. 2. A backup roll (9) is configured such that an outer peripheral surface of the backup roll (7) abuts a shaft portion (7-2) forcibly driven through a drive shaft (8) by applying a pressurizing force. (9)
Of only the side end surface (9-a) on the contact side with the shaft portion (7-2).
The rolling device according to claim 1, wherein the rolling device is configured to abut against 2). 3. A working roll, wherein the outer peripheral surface of the rolled material flange reduction working roll (10) is brought into contact with the shaft portion (7-2) through a backup roll (9) by applying a pressing force. The side end surface (10-a) of the flange pressing side outer peripheral surface of (10) is configured to abut on a web restraining collar (7-1) configured to be rollable. Rolling apparatus according to the item.