JP2627693B2 - Guide device in rolling equipment for section steel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial applications]

The present invention relates to a guide device in a rolling device for section steel, and more particularly, to a guide device for restraining and guiding an H-section steel in a rolling plant in which a universal rolling mill and an edging rolling mill are combined.

[Prior art]

Conventionally, rolling equipment combining a universal rolling mill and an edger rolling mill has been used in a method of rolling an H-section steel. In this rolling equipment, a guide device for guiding the section steel between the edging mills of the edger rolling mill is required. As the guide device, for example, JP-A-3-005012 and JP-A-63-0606
Japanese Patent Application Laid-Open No. 8204 discloses a technique.

In each of these guide devices, as shown in FIG. 2, since the upper and lower edging rolls 13 are in the shape of a drum, a gap generated substantially in the center of the edging rolls 13 is used. A variable width guide that penetrates the gap and guides the inner surface of the flange is provided.

However, when such a variable guide is provided, it is necessary to reduce the height of the variable guide immediately below the roll core due to the roll diameter of the hourglass roll. The reason for this is that unless it is lowered, interference between the edging roll and the variable guide occurs, and the variable guide cannot penetrate between the edging rolls.

[0005] Immediately below the edging roll is the end point of the flange reduction, the flange reduction starts from the universal rolling mill side of the edging roll in an odd-numbered pass, and the flange reduction starts from the edger mill exit side in the even-numbered pass.
For this reason, the thickness of the flange portion increases due to the bulging phenomenon due to the pressure reduction in the vicinity of the front end, and the flange portion becomes thick.

On the other hand, when the flange reduction amount is large and the thickness of the flange portion is small, buckling of the flange portion of the shaped steel is caused by the reduction. From such a place, a penetration guide for guiding the inner surface of the flange portion is provided. For this reason, it is possible to prevent the flange from falling inside the winning guide.

However, in this guide device, the inside of the flange portion is restrained, but there is no restraint on the outside. For this reason, when the flange portion falls outward, for example, the even number of passes is guided to the universal rolling mill as it is, and the flange portion is rolled down. Accidents are likely to occur.

[Problems to be solved by the invention]

[0008] From such a point, the outward fall of the flange portion generated during the edging rolling is adjusted to the guide portion on the inner surface of the flange portion of the penetrating guide that passes through the vicinity of the core of the edging roll having the largest deformation. It is necessary to make the flange portion disappear by pressing it from the outside, and in this case, it is possible to eliminate the problem of the flange portion falling to the outside.

[0009] That is, the shaped steel has four flange portions, and the unbalance of the inclination of these flange portions is the most problematic. By the way, despite the fact that the flange should be pressed down and the radiation should have been reduced, if there is a fall in the flange,
In fact, the width has not been reduced and the width has not been reduced.

[0010] In this state, when a vertical rolling is performed with a universal rolling mill, the leg lengths are different at the four flange portions due to the width expansion. , Resulting in shape defects such as meandering of the flange.

An object of the present invention is to solve such a problem, and a flange outer surface constraining guide roller for constraining an outer surface of a flange portion of an H-shaped steel as a material to be rolled is provided immediately near an edging roll. A flange inner surface guide for restraining the inner surface of the H-section steel flange portion is provided, and the flange inner surface guide is configured to be movable in the width direction of the rolling mill,
A guide device that controls the position of the flange inner surface guide according to the thickness of the flange part, restricts the gap between the flange outer surface constraint guide roller, and prevents the flange from falling or the center deviation during edging I do.

[Means for Solving the Problems]

That is, the present invention relates to a guide device provided at a front portion, a rear portion, or a front portion and a rear portion of a edging rolling mill in a rolling facility in which a universal rolling mill and an edging rolling mill are combined to guide a section steel. There is a width-variable flange inner surface guide that guides the flange of the shaped steel while guiding the flange of the shaped steel from the inside, and a variable width flange edge restraining roller that restrains the flange of the shaped steel from the end, It has a variable width flange outer surface constraining guide roller that constrains and guides the flange portion of the section steel from the outside. It is characterized in that it can be moved in the width direction of the rolling mill and the position can be controlled accordingly.

Hereinafter, the configuration and operation of these means will be described in detail with reference to the illustrated embodiment.

First, in the guide device according to the present invention, in order to prevent the flange portion from falling down due to rolling down by the edging roll and to restrict the flange portion from the outer surface, for example, the thickness of the flange portion or the web height According to the above, a flange outer surface restraining guide roller that can be moved by a cylinder with a positioner or the like is provided at an arbitrary position.

In order to provide this guide device,
In order to prevent the flange portion from falling out, it is preferable that the rolling portion be as close as possible to the edging roll and have a large amount of reduction.

Further, the rigidity of the shaped steel changes depending on the thickness of the flange portion and the height of the web portion, thereby changing the “force” of falling out of the flange. For this reason, the pressing force of the flange outer surface constraining guide roller can be calculated offline in advance according to the target thickness of the minimum flange, and adjusted by pressure or the like.

When such a guide device is used, the position of the flange outer surface constraining guide roller is controlled corresponding to the flange inner surface guide according to the thickness of the flange portion or the height of the web portion of the H-section steel to be rolled. Thereby, it is possible to prevent a reduction in the thickness of the flange portion or the height of the web portion, the occurrence of flaws on the inner surface of the flange portion, the outward fall of the flange due to the reduction of the edging roll, and the prevention of shape defects such as center deviation. .

【Example】

The embodiment will be further described below with reference to the drawings.

FIG. 1 is an explanatory view showing a structure of a guide device according to one embodiment of the present invention, and FIG. 2 is an explanatory view of an example of an edging mill.

First, FIG. 1 shows a guide device according to one embodiment of the present invention. In FIG. 1, reference numeral 10 denotes an H-shaped steel, 1 denotes a guide roller for restraining the flange of the H-shaped steel 10 from the outside 10a, 2 denotes a drive cylinder thereof, and the guide roller 1 is driven by a drive cylinder 2 in the direction of the arrow. It moves and restrains the flange from the outside.

Reference numeral 3 denotes a flange edge restraining roller for restraining the edge of the flange portion, 4 generally indicates a guide device according to the present invention, and 5 is a variable device for moving an inner surface guide of the device 4 in the width direction. A screw 6, a hydraulic motor 6 for the screw 5, a lifting device 7 for the guide device 4,
Reference numeral 8 denotes a hydraulic motor for driving the elevating device 7, and reference numeral 9 denotes an encoder that detects the rotation speed of the hydraulic motor 8.

In the guide device 4, the end face of the flange portion is guided and restrained by the restraining roller 3.
The guide device 4 is provided with a flange inner surface guide 14. The flange inner surface guide 14 guides the inner surface 10a of the flange, guides the H-shaped steel 10 to the web surface, and moves in the width direction.

Therefore, the H-section steel 10 passing through the edging mill is guided while being restrained from the outside by the flange outer surface restraining guide roller 1 on the flange outer surface 10 a, and the flange outer surface restraining guide roller 1 is placed on the variable width guide device 4. The flange outer surface restraining guide roller 1 is provided so as to be stacked, and is connected to a positioning cylinder 2 (with a positioner), and is moved in the direction of the arrow by the cylinder 2. (The moving position of the roller 1 is indicated by a dotted line in FIG. 1.)

This flange outer surface restricted guide roller 1,
The guide device 4 according to the present invention, which comprises a flange inner surface guide 14 and a flange-constrained roller 3 at the flange portion, is installed at the rear of the universal rolling mill, and this device conveys the H-section steel 10 rolled by the universal rolling mill. You. For this reason, in the variable width guide device 4, the inner width of the flange is determined by the roll width of the universal rolling mill, and the position of the inner surface guide 14 and the like is fixed and used. However, the flange inner surface guide 14 can be moved by the screw 5 for variable width and the hydraulic motor 6, and a positioner can be added.

The thickness of the flange portion is determined by the gap between the flange inner surface guide 14 of the guide device 4 according to the present invention and the flange outer surface constraining guide roller 1, and when the guide roller 1 is at the maximum retracted position, The thickness of the part becomes the maximum value, and the guide roller
Is the maximum value of the web height. For this reason, since the flange outer surface constraining guide roller 1 is fixedly mounted on the variable width guide device 4, if the flange outer surface constraining guide roller 1 is moved according to the thickness of the flange portion, the web height and the thickness of the flange portion are increased. Can be adjusted freely. That is, when the flange outer surface constraining guide rollers 1, 1 (only one is shown in FIG. 1) on both sides of the H-shaped steel 10 to be rolled are moved in the direction of the arrow, the H
It can be adjusted according to the web height of the section steel 10.

In addition, when the front and rear ends of the H-section steel of the rolled material have a flange fall or a local bend due to the shape of the crop, it is possible to advance in advance to a predetermined position in a reduction setting,
There is a possibility of a collision accident. For this reason, it is necessary to activate the position setting by a signal such as a load cell of a rolling mill until the leading and trailing ends of the crop to be cut off pass through the equipment.

【The invention's effect】

As described in detail above, the present invention provides:
A guide device that is provided at a front part, a rear part, or a front part and a rear part of the edging rolling mill and guides the shaped steel in a rolling facility in which a universal rolling mill and an edging rolling mill are combined, and a flange part of the shaped steel. Inside guide while also guiding the flange of the shaped steel, flange edge restraining roller that restrains the flange of the shaped steel from the end, and guiding and restraining the flange of the shaped steel from the outside With a flange outer surface constraining guide roller, the position of the flange outer surface constraining guide roller or the flange inner surface guide can be controlled by moving in the rolling mill width direction according to the thickness of the flange portion or the height of the web portion for each pass. It is characterized by comprising.

According to the guide device of the present invention, the position (projection amount) can be controlled according to the thickness of the flange portion of the H-section steel, the height of the web, and the like, so that the flange can be prevented from falling during edging rolling. It is possible to prevent shape defects such as center deviation.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a structure of a guide device according to one embodiment of the present invention.

FIG. 2 is an explanatory diagram of an example of an edging rolling mill.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Flange outer surface constrained guide roller 2 Cylinder (with position) 3 Edge constrained roller of flange part 4 Variable width guide device 5 Screw for variable width 6 Hydraulic motor 7 Elevating device of guide device 4 8 Hydraulic motor 9 Encoder 10 H of expanded material Shaped steel 11 Universal rolling mill 12 Edging rolling mill 13 Edging roll 14 Flange inner surface guide

Continued on the front page (72) Inventor Yoshio Yoshimura 1-chome, Kawasaki-dori, Mizushima, Kurashiki-shi, Okayama Pref. Kawasaki Steel Corporation Mizushima Works

Claims (1)

(57) [Claims] 1. A guide device which is provided at a front part, a rear part, or a front part and a rear part of a edging rolling mill in a rolling facility in which a universal rolling mill and an edging rolling mill are combined, and guides a section steel. A variable width flange inner surface guide that constrains the shaped steel flange from the inside while also guiding the shaped steel flange, a variable width flange edge restraining roller that restrains the shaped steel flange from the end, and a shaped steel flange And a variable width flange outer surface guide roller that guides the outer portion by constraining the portion from the outside, and rolling the flange outer surface guide roller or the inner surface guide according to the thickness of the flange portion or the height of the web portion for each pass. A guide device in a section steel rolling facility, characterized in that it can be moved in the machine width direction to control the position.