JP3133809B2 - Shape steel straightening device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a straightening device suitable for use in straightening a section steel having a web and a flange, such as an H-section steel, and more particularly to an apparatus for effectively reducing a shape defect generated during the straightening of the section steel. Try to avoid.

[0002]

2. Description of the Related Art In order to adjust the cross-sectional shape of an H-beam or the like obtained by hot or cold rolling, the shape is generally corrected by a roller straightener or a gag-type press straightening machine. However, such a straightening means is mainly intended to correct the bending or warpage in the longitudinal direction of the shaped steel, and in particular, does not necessarily have a sufficient function to correct the perpendicularity of the flange to the web. Therefore, for the flange portion, a dedicated straightening machine has been used. References relating to this include, for example,
Reference is made to JP-A-63-72428 or JP-A-63-192517.

[0003]

In the above-described straightening machine for correcting a flange, a vertical roll for restraining the flange is pressed from the outer surface of the flange while the web of the shaped steel is restrained by a horizontal roll, and the flange is pressed against the web of the flange. The angle is to be forcibly corrected, and according to this, the efficiency in such a correction operation can be significantly improved. However, according to the pressing condition of the roll that restrains the flange of the shaped steel, the straightening machine is required to correct the shape of the shaped steel (hereinafter simply referred to as the material to be corrected) due to the deviation of the biting position between the vertical roll and the horizontal roll. ) Gradually deviated up and down, and warpage occurred due to plastic deformation at the time of straightening, and there was a problem that the center of the web was deviated. In order to solve such inconvenience, it is only necessary to reduce the restraining force of the web by the horizontal roll and the pressing force of the flange by the vertical roll, but with this, it is possible to sufficiently correct the shape of the material to be corrected. Instead, a solution was desired.

[0004] It is an object of the present invention to effectively eliminate the above-mentioned disadvantages that occur when using a straightening device suitable for locally correcting a material to be corrected, particularly in a flange.

[0005] As a result of repeated experiments and studies in order to avoid shape defects occurring during straightening of the material to be rolled, in particular, deviation of the center of the web, the center of the flange of the material to be rolled and the roll of a vertical roll disposed in the straightening device. It has been found that guiding the straightening material to the straightening device while aligning the center of the torso is extremely effective. The present invention is based on the above findings. That is, the present invention is an apparatus for straightening a web having a web and a flange obtained by performing hot or cold rolling, and a non-drive type of rolling the web of the shaped steel by sandwiching the web between its front and back surfaces. A horizontal roll pair and a vertical roll having a rotary drive mechanism capable of changing a roll contact angle which is in contact with a flange of the shaped steel and corrects an angle of the flange with respect to the web are provided. A guide for biting position control is provided, which can be approached / separated toward the end of the flange width and guides the shaped steel while aligning the center of the flange of the shaped steel with the center of the roll cylinder of the vertical roll. Do,
A straightening device for shaped steel, characterized in that:

FIGS. 1 and 2 show an example in which the configuration of the straightening device according to the present invention is applied to an H-shaped steel.
The side and front main parts are shown. In the figure, reference numeral 1 denotes an H-shaped steel having a web w and a flange f (hereinafter simply referred to as a material to be corrected), and 2 denotes a web w of the material 1 to be corrected.
And a pair of non-driving horizontal rolls that rolls with the front and back surfaces sandwiched between them, and at least one of the horizontal roll pairs 2a and 2b, for example, the roll 2a, moves up and down by the operation of the cylinder S. It is possible to cope with the correction of materials to be corrected having different sizes. Reference numeral 3 denotes a vertical roll which contacts the outer surface of the flange f of the material to be corrected 1 and corrects the angle of the flange f with respect to the web w. The vertical roll 3 comprises a driving source 3a for driving the same and a vertical roll. 3 is provided with a jack 3c for tilting together with a chock 3b holding the jack 3 to change the contact angle of the roll.
4a and 4b are cartridges on which the vertical roll 3 is placed together with the chocks 3b.
Can be driven in the frame 5. Reference numeral 6 denotes a screw rod 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 driving means (not shown). By rotating the cartridge 4a, the cartridge 4a is moved together with the vertical rolls 3 in the frame 5 to adjust the roll interval. 7 is a balance cylinder fixedly held on the frame 5 and one end thereof is connected to the cartridge 4a, 8 is a balance cylinder fixedly held on the frame 5 and one end thereof is connected to the cartridge 4b, and 9 is a hydraulic cylinder connecting the frame 5 and the cartridge 4b. The cylinder 9 presses the vertical roll 3 placed on the cartridge 4b against the flange f of the material to be corrected with a constant pressure, and when the pressure equal to or more than the specified pressure acts, the cartridge 4b is moved from the flange f. The structure is such that a constant pressing force is always obtained by being retracted away. Reference numeral 10 denotes a lifting / lowering jack for moving the frame 5 up and down. Even when the jack 10 corrects materials to be corrected having different sizes, the center of the flange f of the section steel and the roll of the vertical roll 3 are used. Adjust the level above and below so that the centers match. Reference numeral 11 denotes a guide for controlling the biting position disposed on the entry side of the vertical roll 3, and this guide 11 is useful for preventing breakage when an excessive load is applied when guiding the material 1 to be corrected. Elevating means capable of moving up and down along a slide base 12 provided on a buffer mechanism 11a and a roll chock of a horizontal roll
(E.g., a screw type jack), and has a function of making the center of the flange f of the material to be corrected 1 coincide with the roll center of the vertical roll 3 by approaching / separating toward each flange width end.

[0007]

In the correction of the material to be corrected, as shown in FIG.
The flange f is first constrained by the vertical roll 3 when it deviates from the pass line P, and then the web w of the material 1 to be corrected conforms to 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 particular problem because it can be moved to the position.
Since the material to be straightened such as a shaped steel has a smaller web thickness than the flange thickness, the joining position of the web w to the flange f as shown in FIG. Is inevitable to fluctuate.

Further, when the flange f is pressed by the vertical roll 3 in correcting the material 1 having a sectional shape as shown in FIG. 5, only the lower end of the flange f of the material 1 is fixed. The material to be corrected 1 is easily displaced up and down because the contact between the vertical roll 3 and the flange f changes from a point to a line and a plane instead of a line to a plane. It had become.

In the present invention, since the guide 11 for guiding the flange f of the material to be corrected 1 is provided immediately before being bitten by the vertical roll 3, the material to be corrected 1 before deformation is warped or deformed. However, since the center of the flange f and the roll center of the vertical roll 3 can always be made coincident, 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 described above, the guide 11 is arranged at all the flange width ends of the material 1 in consideration of the downward deformation at the tail end of the material 1 to be rolled. However, the material to be corrected 1 is usually conveyed by a table roller r for conveyance. Therefore, when there is no possibility that the material to be corrected 1 is deformed below the table roller r, the guide 11 may be provided only at the position of the flange width end at the upper part of the material to be corrected 1. Good.

[0011]

As described above, according to the present invention, even if the material to be straightened has a deformation such as warpage, the center of the flange and the center of the roll cylinder of the vertical roll can be introduced into the straightening device. At this time, the center of the flange is not deviated, and the angle of the flange with respect to the web can be effectively corrected.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating the configuration of a straightening device according to the present invention.

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

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

FIG. 4 is a diagram showing a cross-sectional shape of an H-beam after straightening.

FIG. 5 is an explanatory diagram of a correction procedure of a material to be rolled.

[Explanation of symbols]

 1 Material to be corrected 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 Guide for biting position control 12 Slide base w Web f Flange P Pass line

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Susumu Katayama 1-chome, Mizushima-Kawasaki-dori, Kurashiki-shi, Okayama Pref. Kawasaki Steel Corporation Mizushima Works (56) References JP-A-3-169430 (JP, A (58) Fields surveyed (Int. Cl. ⁷ , DB name) B21D 3/05

Claims (1)

(57) [Claims] 1. A device for straightening a web having a flange and a web obtained by performing hot or cold rolling, and a non-driving horizontal type rolling the web of the shaped steel between its front and back surfaces. A roll pair and a vertical roll having a rotary drive mechanism capable of changing a roll contact angle in contact with a flange of the section steel and correcting the angle of the flange with respect to the web; A guide for biting position control is provided, which can be approached / separated toward the width end and guides the shaped steel while aligning the center of the flange of the shaped steel with the center of the roll cylinder of the vertical roll. A straightening device for shaped steel, comprising: