JPH057934A - Squareness straightening device for flange of h-beam - Google Patents

Abstract

(57) [Summary] [Object] To provide a device which can correct the deformation of the flange 8 without causing a defective shape of the web 9 of H-section steel, has a simple structure, and can be miniaturized. [Structure] A web restraining roll 5 is attached to a main body frame 2 to which a flange pushing roll 4 is attached so that the web restraining roll 5 is movable in the left-right direction (web width direction), and a corner portion 10 which is a connecting portion between a web 9 and a flange 8 is formed. By making it possible to restrain the device, the device is simplified and downsized, and the correction effect of the flange 8 is enhanced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for correcting the squareness of H-section steel.

[0002]

2. Description of the Related Art H-section steel is generally formed by hot rolling by a universal mill having upper and lower horizontal rolls and vertical rolls, cut into a predetermined length, and then cooled by a cooling bed. .. And
After that, warp and bending are corrected by a roller straightening machine or the like.

However, the rolled H-section steel has a non-uniform flange thickness due to the axial movement of the rolls due to wear and rattling of the upper and lower horizontal rolls during rolling, elastic deformation, or the like. May be. or,
A temperature difference occurs due to a difference in temperature between the inner surface and the outer surface of the flange, a difference in cooling conditions in the cooling process, a difference in thickness between the flange and the joint between the web and the flange, and as a result, as shown in FIGS. In many cases, the flange of the H-section steel after cooling is deformed so that it is not perpendicular to the web.

When the flange is deformed in this way, it cannot be straightened by an ordinary roller straightening machine, and special means such as press straightening and heat straightening are required, but all of these works are done by the operator. Depends on skill and intuition. Therefore, it is a big problem in terms of productivity and quality.

Conventionally, there is a means for pushing the outer surface of the flange 8 inward with the pushing roll 4 (Japanese Patent Publication No. 55-30923) as a means for correcting the squareness of the H-section steel online. 9 is effective in correcting the bending deformation of the flange 8 as shown in FIG. 9, but not effective in correcting the inclined deformation of the flange 8 as shown in FIGS. 5 and 6. Further, as another method, Japanese Patent Laid-Open No. 63-1925
There is a method as shown in No. 17 (FIG. 4). In this method, the upper and lower surfaces of the web 9 are constrained by the constraining rolls 5 when the webs 9 are pushed in by the constraining rolls 4. The restraining roll 5 can be moved in the vertical direction to correspond to the thickness of the web 9, but cannot be moved in the horizontal direction.

[0006]

When the squareness of the flange 8 is corrected by such a conventional technique, the restraining roll 5 cannot be moved in the left-right direction, so that its position is on the flange 8 having any inclination angle. In order to be compatible, it is set at a position apart from a corner portion 10 which is a connecting portion between the flange 8 and the web 9. That is, when the pushing roll 4 pushes the flange 8, the restraining roll 5 restrains the web 9 at a position apart from the corner portion 10. As a result, when the flange 8 is pushed in, a shape defect is likely to occur between the corner portion 10 and the portion restrained by the restraining roll 5.

The present invention has been devised in view of these problems, and provides a device that can correct the flange 8 without causing a defective shape of the web 9 and has a simple structure and can be miniaturized. Is the task.

[0008]

[Means for Solving the Problems]
The main body frame 2, the tilting mechanism 3, the pushing roll 4, the restraining roll 5, and the moving mechanism 6 are included.

The body frame 2 has a flange 8 of H-shaped steel 1.
It is movable in the left-right direction to press and is provided in a pair facing left and right. The tilting mechanism 3 is attached to the main body frame 2 in order to tilt the tilting frame 7 rotatably attached to each main body frame. The pushing roll 4 is rotatably mounted on the tilting frame 7 so as to rotate while pressing the outer surface of the flange 8 of the H-shaped steel 1.
The restraint roll 5 restrains both ends of the web 9 of the H-shaped steel 1 from above and below. Then, the moving mechanism 6 is assembled to each main body frame 2, and the restraining roll 5 moves the restraining roll 5 to the left and right so as to restrain the corner portion 10 which is a connecting portion between the web 9 of the H-shaped steel 1 and the flange 8. It moves in the direction.

[0010]

The operation of the present invention will be described below.

First, the H-shaped steel 1 is provided between the pair of body frames 2.
To enter. At this time, the pair of body frames 2 are moved in the left-right direction corresponding to the width of the H-shaped steel 1. Next, the restraint roll 5 is moved by the moving mechanism 6 to a position as close as possible to the corner 10 of the H-shaped steel 1, and the position (corner 10 of the web 9) is restrained.

This restraint location differs depending on the inclination angle of the H-shaped steel flange 8. In the case of normal straightening, the body frame 2 is moved according to the web height and flange thickness of the H-shaped steel as the material to be straightened, and the position of the pushing roll 4 is determined.
Then, after setting the position of the web restraint roll, the H-section steel is passed. When the degree of deviation of the squareness is particularly large, the pressing roll 4 is moved after restraining the web 9 to press the outer surface of the flange 8 to correct the inclination of the flange 8.

By correcting the flange 8, it becomes possible to move the restraining roll 5 to the corner portion 10,
Therefore, the restraining roll 5 is positioned at the corner 10 by driving the moving mechanism 6 again.

With the pressing roll 4 straightening the flange 8 and the restraining roll 5 positioned at the corner 10, the H-section steel 1 is conveyed, whereby the squareness of the H-section steel 1 flange 8 is continuously changed. It is something to be corrected. H transported continuously
Since the corners 10 of the shaped steel 1 are constrained, there is no deformation between the constrained portions of the web 9 and the corners 10, which has been a problem in the past.

It should be noted that in order to perform the corrective operation accurately by making the contact between the flange 8 and the pushing roll 4 a line contact, the pushing mechanism 4 is tilted by the tilting mechanism 3 via the tilting frame 7.

Further, in the present invention, since the moving mechanism 6 for moving the restraining roll 5 is assembled to the main body frame 2 to which the pushing roll 4 and the tilting device are assembled, the restraining roll 5 and the moving mechanism 6 are mounted on the main body frame. Unlike the case where it is provided separately from 2, the two mechanisms do not interfere with each other.

[0017]

1 to 3 show an embodiment of the present invention.

The main body frames 2 are provided so as to face each other on the left and right, and each main body frame 2 is provided with two side plates facing each other on the front and rear sides.
It consists of 11. The horizontal movement of the main body frame 2 is achieved by a cylinder (not shown).

The tilting mechanism 3 is composed of a cylinder or the like assembled to a fixed block 12 fixed to the body frame 2. By expanding and contracting the rod of this cylinder,
Tilt frame 7 rotatably assembled to the body frame 2
To rotate.

The tilting frame 7 has a U-shape, and its rear end is connected to the tilting mechanism 3 and the first chock 14 is vertically attached to the tip of the tilting mechanism 3. The push roll 4 is rotatably assembled to the pair of first chocks 14.

The moving mechanism 6 is attached to the fixed base 13 fixedly attached to the main body frame 2 via the second chock 15. The moving mechanism 6 includes a shaft 22 slidably mounted on a second chock 15 via a guide 21, a first bearing 23 mounted on the tip of the shaft 22 so that the constraining roll 5 is rotatable, It is rotatably assembled to the second chock 15 via the second bearing 24, and is screwed to the rear end of the shaft 22 by the threaded portion 20 to form a rotary screw having a sprocket 18.

The rotational force of the motor 16 is transmitted to the rotary screw 19 through the chain 17, and the rotary screw 19 is rotated to rotate the shaft 22 and the restraining roll 5 rotatably attached to the shaft 22.
To move left and right. The movement of the shaft 22 is smoothly achieved by the action of the guide 21.

By reversing the rotation direction of the motor 16, the moving direction of the shaft 22 (restraint roll 5) is changed. By the function of this moving mechanism 6, the gap g between the restraining roll 5 and the pushing roll 4 can be freely set, that is, the restraining roll 5 can be freely positioned at the corner 10 of the H-section steel web 9. ..

[0024]

As described above, according to the present invention, since the restraint rolls can be moved in the left and right directions, the corner portions of the web can be restrained, and therefore the deformation around the corner portions of the web during the flange straightening can be suppressed. You can In addition, since the straightening effect is enhanced by being able to restrain the corners with the restraint rolls, the amount of flange pushing required for straightening can be reduced, and therefore damage to the outer surface of the flange caused by pushing the flange can be suppressed.

Further, in the present invention, since the moving mechanism for moving the restraining roll is attached to the main body frame to which the pushing roll and the tilting device are attached, the two mechanisms do not interfere with each other, so that the present invention It has become possible to improve the functionality of the device and to reduce its size and simplification.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a view taken along the line AA in FIG.

FIG. 3 is a view taken along the line BB in FIG.

FIG. 4 is a front view showing a conventional technique.

5 to 9 are partial front views showing the inclination of the H-section steel flange.

[Explanation of symbols]

1; H-shaped steel 2; Body frame
3; Tilt mechanism 4; Pushing roll 5; Restraint roll
6; moving mechanism 7; tilting frame 8; flange
9; Web 10; Corner 11; Side plate
12; Fixed block 13; Fixed base 14; First chock
15; Second chock 16; Motor 17; Chain
18; Sprocket 19; Rotating screw 20; Thread part
21; Guide 22; Shaft 23; First bearing
24; Second bearing

Claims (1)

Claims: 1. A pair of main body frames (2), which are movable left and right to press the flange of the H-section steel (1) and are opposed to each other on the left and right sides, and a pair of main body frames. In order to tilt the tilting frame (7) that is movably mounted,
The tilting mechanism (3) assembled to (2) and the tilting frame
A pushing roll rotatably assembled to (7) so as to rotate while pressing the outer surface of the flange (8) of the H-shaped steel (1).
(4), a constraining roll (5) for constraining both ends of the web (9) of the H-section steel (1) from above and below, and the constraining roll (5) assembled to each of the body frames (2). , The corner portion (10) which is the connecting portion between the web (9) and the flange (8) of the H-section steel (1)
A straightness correction device for H-shaped flanges, which comprises a moving mechanism (6) for moving the restraining roll (5) in the left-right direction so as to restrain the above.