JPH0565403U - Rolling equipment for shaped steel with flange - Google Patents

Abstract

(57) [Summary] [Purpose] Expanding the height of a web in shaped steel with an arbitrary amount,
(EN) Provided is a rolling device for a shaped steel having a flange which can be surely performed with a simple facility. [Structure] In a hot rolling process of a shaped steel 2 having a flange such as an H-shaped steel, a finish universal rolling machine 4 in which a universal horizontal roll is configured so that the width of the roll can be adjusted
Two rolls, which are the web height expanding rolls 5, on the front of the
5a and 5a are arranged so as to contact each other on the outer peripheral surface of the roll. Then, the line 6 connecting the rotation centers of the rolls 5a, 5a,
By changing the angle to the rolling direction at an arbitrary angle, the rolls 5a, 5a can be expanded in the web height direction while being in contact with each other, so that the shaped steel 2 can be stretched to a desired web height and rolled. It can be so.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rolling apparatus capable of producing a shaped steel having an arbitrary web height by using the same rolling roll in the hot rolling of a shaped steel having a flange such as an H-shaped steel. ..

[0002]

[Prior Art and Problems to be Solved by the Invention]

 The production of H-section steels or similar section steels, that is, section steels with flanges, which are carried out in this type of rolling mill, are generally carried out by the universal rolling method. This universal rolling method is a process as shown in FIG. 3, that is, a double rolling mill called a breakdown rolling mill 20 is used to roll a rough steel strip, and then a rough universal rolling mill 21 and an edger rolling mill 22 are used. In the above, the web and the flange surface of the crude steel slab and the front end of the flange are rolled down, and then finished by the finishing universal rolling machine 23 to a predetermined size.

Such a universal rolling method has an advantage that the same roll can be shared for sizes having different cross-sectional dimensions. However, in the same rolling chance, the same roll is used, so the web height changes with the change in the cross-sectional dimension, especially when the flange thickness changes. Inevitably, shaped steels with different web heights are formed. The inner height of H-section steel can be made constant.

Therefore, as a rolling apparatus that freely adjusts the height of the web, conventionally, a rolling apparatus that adjusts the height of the web by expanding the height of the web with a roll inscribed in a flange (Japanese Patent Laid-Open No. 60- See 206502 publication). Alternatively, a rolling device (see Japanese Patent Laid-Open No. 63-140708) provided with a disk roll for supporting the expanding roll is generally known in order to obtain the strength of the expanding roll for adjusting the web height.

However, the above-described conventional rolling apparatus has the following problems. In other words, the web height enlarging roll shown in the former rolling device must support the reaction force of the web height enlarging by a cantilever due to its mechanical structure, and in order to achieve a large enlarging amount. Becomes a large-scale facility.

Further, in the latter method in which the disc rolls of the rolling mill are provided side by side, the reaction force of the web expansion can be made to be handled by the disc rolls, so that the mechanical strength of the mill is smaller than that of the former mill. Although it is improved, it is difficult to arbitrarily set the web height expansion amount, and it is not possible to manufacture multiple sizes of shaped steel within the same chance.

This invention was created in view of the above-mentioned circumstances, and its purpose is to provide a shaped steel having a flange capable of reliably expanding the height of the web in the shaped steel by an arbitrary amount with simple equipment. To provide a rolling apparatus.

[0008]

[Means for Solving the Problems]

 The rolling apparatus according to the present invention is installed on the finishing universal rolling machine capable of adjusting the roll width of the universal horizontal rolls and on the front surface of the rolling line of the finishing universal rolling machine. It is equipped with a web height expanding roll consisting of two rolls arranged side by side. Further, in the web height expanding roll, the outer peripheral surface of each roll is contacted from a state in which the line connecting the rotation centers of the rolls extends in the rolling direction of the shaped steel to a state in which it extends in the direction intersecting with the rolling direction at right angles. The shape of the shaped steel can be stretched to a desired web height and roll-formed when the line connecting the centers of rotation of the rolls is not extended in the rolling direction.

Then, the cantilevered web height increasing rolls are installed so as to be in contact with each other at their outer peripheral portions. Further, the above-mentioned problems are solved by adopting a structure in which the rotation center connecting line of each roll in the web height expanding roll can be changed to an arbitrary angle with respect to the rolling direction.

That is, by installing the web height increasing rolls so that the outer circumferences of the rolls are in contact with each other, the reaction force of the web height increasing is offset, so that a structure requiring less mechanical strength is provided. Is designed to be more compact. Moreover, the rotation center tie line of each roll in the web height expanding roll is changed to an arbitrary angle with respect to the rolling direction so that the web height expanding amount can be set arbitrarily.

[0011]

【Example】

 The apparatus for rolling shaped steel having a flange according to the present invention will be described below with reference to the embodiments shown in FIGS. 1 and 2.

In a rolling facility 3 (see FIG. 2) for hot rolling a shaped steel 2 (see FIG. 1) having a flange such as H-section steel, the rolling mill 1 installed on the rolling line 3a is It is installed on the front surface of the rolling line 3a of the finishing universal rolling machine 4 (see Fig. 2) that allows the roll width of the universal horizontal rolls to be adjusted, and its outer peripheral surfaces are in contact with each other. And a web height expanding roll 5 (see FIG. 1) consisting of two rolls 5a, 5a juxtaposed with each other.

The web height expanding roll 5 changes from a state in which a line 6 connecting the rotation centers of the rolls 5a, 5a extends in the rolling direction of the shaped steel 2 to a state in which it extends in a direction intersecting the rolling direction at right angles. It can be changed with the outer peripheral surfaces of the rolls 5a, 5a in contact with each other, and the shaped steel 2 can be adjusted to any web height except when the line 6 connecting the rotation centers of the rolls 5a, 5a extends in the rolling direction. It is configured so that it can be stretched and rolled.

Reference numeral 7 in FIG. 2 is a breakdown rolling mill, 8 is a rough universal rolling mill, and 9 is an edger rolling mill.

Roll forming by stretching the web height of the shaped steel 2 by the rolling apparatus 1 having such a configuration is performed as described below.

First, as shown in FIG. 1 (a), the line 6 connecting the rotation centers of the rolls 5 a, 5 a in the web height expanding roll 5 is set to extend in the rolling direction of the shaped steel 2. In this state, the web height of the shaped steel 2 is not expanded or expanded. .

Next, when it is necessary to extend and expand the height of the web of the shaped steel 2, as shown in FIG. 1 (e), the line 6 connecting the rotation centers of the rolls 5a, 5a to the shaped steel 2 is connected. Change to a state that extends in a direction intersecting the rolling direction at right angles.

At this time, an angle θ (see (c) in FIG. 1) between a line 6 connecting the centers of rotation of the rolls 5a, 5a and a line 10 intersecting the rolling direction of the shaped steel 2 at right angles is set to an arbitrary value. By adjusting the angle, it is possible to set the extension amount of the web height to an arbitrary amount.

In this way, according to the rolling apparatus 1 of the present invention, the web height expanding roll 5 can easily and reliably expand and expand the web height of the shaped steel 2.

[0020]

[Effect of the device]

 According to this invention, when rolling a section steel having a flange such as an H-section steel, a web height expanding roll is provided in front of a finishing universal rolling machine in which a universal horizontal roll having a roll width adjustable.

Therefore, by arranging the web height increasing rolls so that their outer peripheral surfaces are in contact with each other, it is possible to reduce the size of a rolling device having a simple structure by which a shaped steel having a constant outer dimension can be formed. Became possible.

Further, in the web height expanding roll of the present invention, the line connecting the centers of rotation of the rolls is changed to an arbitrary angle with respect to the rolling direction to arbitrarily set the web height expanding amount. It has become possible.

[Brief description of drawings]

FIG. 1 is a schematic view showing a web height expanding roll in a rolling device for a shaped steel having a flange according to the present invention, (a)
Is a plan view showing the case where the web height expansion amount is 0, and (b) is
(a) is a cross-sectional view taken along the line AA, (c) is a plan view showing the case where the web height expansion amount is arbitrary, (d) is a cross-sectional view taken along the line BB of (c), and (e) is It is a top view showing the case where the amount of web height expansion is the maximum, and (f) is a CC line sectional view of (e).

FIG. 2 is a schematic view showing a rolling facility equipped with the rolling apparatus of the present invention.

FIG. 3 is a schematic view showing a conventional rolling facility.

[Explanation of symbols]

1 ... Rolling equipment, 2 ... Shaped steel, 3 ... Rolling equipment, 3a ... Rolling line, 4 ... Finishing universal rolling mill, 5 ... Web height expanding rolls, 5a ... Rolls, 6 ... Lines connecting rotation centers, 7 ... Break Down rolling mill, 8 ... Coarse universal rolling mill, 9 ...
Edger rolling machine, 10… A line that intersects the rolling direction at right angles.

Claims (1)

[Scope of utility model registration request] 1. A rolling mill installed on a rolling line of a rolling mill for hot rolling a shaped steel having a flange such as an H-shaped steel, which makes it possible to adjust the roll width of a universal horizontal roll. A finish universal rolling mill and a web height expanding roll, which is installed on the front surface of the rolling line of the finish universal rolling mill and is composed of two rolls arranged side by side with their outer peripheral surfaces in contact with each other. The web expanding roll has a state in which the outer peripheral surface of each roll is in contact with a line connecting the centers of rotation of the rolls extending from the rolling direction of the shaped steel to a state extending in a direction intersecting the rolling direction at right angles. Can be changed by, and when the line connecting the rotation centers of the rolls is not in the state of extending in the rolling direction, the shaped steel is stretched to a desired web height and rolled. Rolling apparatus of shaped steel having flanges, characterized in that it is configured to so that.