JPH05220515A - Straightening device of shape steel - Google Patents

Abstract

PURPOSE:To avoid the defective shape of the stock to be straightened, especially, the offset of the web center by providing the guide for warp preventing being able to approach and separate toward each flange width end part of shape steel at the inlet side of the vertical roll. CONSTITUTION:A cylinder presses a vertical roll 3 mounted on a cartridge toward a flange f of a stock to be straightened with the constant pressure, in the case applying over the specified pressure the cartridge is retreated to the direction separating the cartridge from the flange (f), and the constant pressurizing force is always obtained. A guide 11 for preventing the warp deformation arranged at the inlet side of vertical roll 3 provides a shock absorbing mechanism 11a being useful for preventing the break, etc., in the case being applied with the excess load at the time introducing the stock to be straightened 1 and an elevating/lowering means freely movable upward and downward along a slide base 12 of the roll choke of horizontal roll, and has the function bringing to the center of flange f of the stock to be straightened 1 by approaching and separating toward each flange width end part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a straightening apparatus suitable for straightening a shaped steel having a web and a flange such as an H-shaped steel, and more particularly, it effectively prevents a defective shape generated during the straightening of the shaped steel. It is something to avoid.

[0002]

2. Description of the Related Art The H-section steel obtained by hot or cold rolling is generally modified by a roller straightener or a gag type press straightening machine in order to adjust its cross-sectional shape. However, such a straightening means is intended mainly for straightening the bending and warpage of the shaped steel in the longitudinal direction, and in particular, it cannot be said that it has a sufficient function to correct the perpendicularity of the flange to the web. Therefore, for the flange portion, a straightening machine dedicated to it was used. References relating to this include, for example,
Reference is made to 63-72428 or JP-A-63-192517.

[0003]

SUMMARY OF THE INVENTION In the straightening machine for correcting a flange described above, the web of shaped steel is restrained by a horizontal roll, and a vertical roll for restraining the flange is pressed against the web of the flange. It is intended to forcibly correct the angle, which can significantly improve the efficiency of such straightening work. However, the straightening machine, depending on the pressing condition of the roll that restrains the flange of the shaped steel, causes the shaped steel to be straightened due to the deviation of the biting position of the vertical roll and the horizontal roll (hereinafter, simply referred to as a material to be straightened). However, there is a problem that the center of the web is biased due to the warpage caused by the plastic deformation during correction. In order to eliminate such inconvenience, the restraint force of the web by the horizontal rolls and the pressing force of the flange by the vertical rolls may be reduced, but this can sufficiently correct the shape of the material to be straightened. No, the solution was desired.

SUMMARY OF THE INVENTION It is an object of the present invention to effectively eliminate the above-mentioned problems that occur when a straightening device suitable for locally straightening a material to be straightened, particularly a flange, is used.

[0005]

[Means for Solving the Problem] As a result of various experiments and examinations for avoiding a shape defect caused during straightening of a material to be rolled, in particular, deviation of the center of the web, it is arranged at the center of the flange of the material to be straightened and the straightening device. It has been found that it is extremely effective to guide the straightening material to the straightening device while matching the center of the roll cylinder of the vertical roll to be formed. The present invention is based on the above findings. That is, the present invention is an apparatus for straightening a shaped steel having a web and a flange obtained by performing hot or cold rolling, which is a non-driving type in which a web of shaped steel is sandwiched between its front and back surfaces and rolled. A horizontal roll pair and a vertical roll having a rotary drive mechanism in contact with the flange of the shaped steel to adjust the angle of the flange with respect to the web are provided, and each vertical steel roll is provided on the inlet side of the vertical roll. A straightening device for a shaped steel, characterized in that a guide for preventing warpage deformation that can approach and separate toward the flange width end is arranged.

Now, referring to FIGS. 1 and 2, the configuration of the straightening device according to the present invention is applied to H-section steel as an example.
The main parts of the side surface and the front surface are shown. Number 1 in the figure is a web w and an H-shaped steel having a flange f (hereinafter simply referred to as a material to be corrected), 2 is a web w of the material 1 to be corrected.
Is a non-drive type horizontal roll pair that rolls between the front and back surfaces thereof, and at least one roll of the horizontal roll pairs 2a and 2b, for example roll 2a, is vertically moved up and down by the operation of the cylinder S. It is possible, and it can also be applied to the correction of different size materials. Further, 3 is a vertical roll which comes into contact with the outer surface of the flange f of the material to be straightened 1 and corrects the angle of the flange f with respect to the web w. The vertical roll 3 is a drive source 3a and a vertical roll for driving the vertical roll 3. It has a jack 3c for inclining 3 together with a chock 3b for holding it to change the contact angle of the roll.
4a and 4b are cartridges for mounting the vertical roll 3 together with the chocks 3b.
Is capable of traveling within the frame 5. A screw rod 6 is rotatably held by the frame 5. One end of the rod 6 is connected to at least one cartridge, for example, the cartridge 4a, and the rod 6 is driven by a driving means (not shown). By rotating the cartridge 4a, the cartridge 4a is moved together with the vertical roll 3 in the frame 5 to adjust the roll interval. Reference numeral 7 denotes a balance cylinder fixedly held on the frame 5 and having one end connected to the cartridge 4a, 8 a balance cylinder fixedly held on the frame 5 and having one end connected to the cartridge 4b, and 9 a hydraulic cylinder connecting the frame 5 and the cartridge 4b. The cylinder 9 presses the vertical roll 3 placed on the cartridge 4b toward the flange f of the material to be straightened at a constant pressure, and when the pressure more than the specified pressure is applied, the cartridge 4b is removed from the flange f. The structure is such that a constant pressing force is always obtained by retracting in the direction of separation. Further, 10 is an elevating jack for moving the frame 5 up and down, and when the jack 10 is used to straighten different to-be-corrected materials, the center of the flange f of the shaped steel and the roll of the vertical roll 3 Adjust the upper and lower levels so that the centers match. Reference numeral 11 is a warp deformation preventing guide arranged on the entrance side of the vertical roll 3, and this guide 11 is useful for preventing damage when an excessive load is applied when guiding the material 1 to be straightened. The cushioning mechanism 11a and the slide base 12 provided on the roll chock of the horizontal roll are provided with lifting means (such as a screw-type jack) capable of moving up and down, and the material to be straightened is moved toward and away from each flange width end. It has the function of the center of the flange f.

[0007]

In the correction of the material to be straightened, as shown in FIG. 3, if there is a deformation such as a warp on the entrance side of the straightening device, the material to be straightened 1
The flange f is first restrained by the vertical roll 3 when it deviates from the pass line P, and then the web w of the material 1 to be straightened coincides with the pass line P by the horizontal roll pair 2. At this time, if the web w has sufficient strength to overcome the frictional force generated by the pressing of the vertical roll 3 against the flange f, the center of the flange f coincides with the center of the roll cylinder of the vertical roll 3. There is no problem because it can be moved to the position, but generally H
Since the material to be straightened, such as shaped steel, has a smaller web thickness than the flange thickness, as shown in FIG. 4, the joint position of the web w with respect to the flange f is maintained with the flange f maintained in the initial state restrained by the vertical roll 3. Fluctuations are inevitable.

Further, in the case of pressing the flange f with the vertical rolls 3 in the correction of the material to be straightened 1 having the sectional shape as shown in FIG. 5, only the lower end portion of the flange f of the material to be straightened 1 is to be pressed. The material to be straightened 1 is easily displaced up and down because it is plastically deformed and extends in its longitudinal direction, and moreover, the contact state between the vertical roll 3 and the flange f changes from line to face instead of line to face. It was.

In the present invention, since the guide 11 for guiding the flange f of the material 1 to be straightened is provided immediately before it is bitten into the vertical roll 3, the material 1 to be straightened before straightening may be deformed such as warped. However, since the center of the flange f and the roll center of the vertical roll 3 can always be made to coincide with each other, the center of the flange does not deviate during straightening, and a straightening material having a good cross-sectional shape can be obtained.

In FIGS. 1 and 2, when the guide 11 is arranged at all the flange width end portions of the material 1 to be straightened in consideration of the downward deformation of the tail end portion of the material 1 to be rolled. However, the material to be straightened 11 is normally conveyed by the table roller r for conveyance. Therefore, if there is no fear that the material to be corrected 1 will be deformed below the table roller r, the guide 11 may be provided only at the position of the flange width end portion in the upper portion of the material to be corrected 1. Good.

[0011]

As described above, according to the present invention, even if the material to be straightened is deformed such as warped, the center of the flange and the center of the roll cylinder of the vertical roll can be aligned and introduced into the straightening device. At that time, the center of the flange is not biased, and the angle of the flange with respect to the web can be effectively corrected.

[Brief description of drawings]

FIG. 1 is a structural explanatory view of a correction device according to the present invention.

FIG. 2 is a structural explanatory view of a straightening device according to the present invention.

FIG. 3 is a diagram showing a correction situation of a material to be corrected.

FIG. 4 is a view showing a cross-sectional shape of H-section steel after straightening.

FIG. 5 is an explanatory diagram of a method of straightening a material to be rolled.

[Explanation of symbols]

 1 material to be straightened 2 horizontal roll pair 3 vertical roll 4a cartridge 4b cartridge 5 frame 6 screw rod 7 balance cylinder 8 balance cylinder 9 hydraulic cylinder 10 lifting jack 11 warp prevention guide 11a buffer mechanism 12 slide base w web f flange P path line

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Minor Fukuda Inami Mizushima Kawasaki-dori, Kurashiki City, Okayama Prefecture (without street number) Inside the Mizushima Steel Works, Kawasaki Steel Co., Ltd. Chome (No house number) Kawasaki Steel Co., Ltd. Mizushima Works

Claims (1)

[Claims] 1. A device for straightening a shaped steel having a web and a flange obtained by hot or cold rolling, wherein a web of shaped steel is sandwiched between the front and back surfaces of the shaped steel and is rolled without driving. A pair of rolls and a vertical roll having a rotary drive mechanism that is in contact with the flange of the shaped steel and corrects the angle of the flange with respect to the web are provided. Each vertical flange of the shaped steel is provided on the inlet side of the vertical roll. A shaped steel straightening device, characterized in that a guide for controlling a biting position that can approach and separate toward the width end is arranged.