JP2570950B2 - Straightness correction device for section steel - Google Patents

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 a right angle of a section steel (H section steel, I section steel, channel steel, etc.) manufactured by rolling or welding.

[0002]

2. Description of the Related Art As is well known, in a section steel manufactured by rolling or welding, welding distortion, deformation of a rolling roll,
Warpage or bending occurs due to a temperature difference between the inner and outer surfaces and the like, and a squareness defect is likely to occur. FIG. 7 exemplifies the shape pattern of the squareness failure of the H-section steel, and there are four types, usually (a) to (d).

[0003] There are various means for correcting such a squareness defect of the H-section steel. One of them is a web restraining device for pressing and restraining the web of the H-section steel from both sides.
2. Description of the Related Art There is known a straightening device including a pair of flange pushing-in devices that presses both side surfaces of a flange of a section steel to impart an independent plastic deformation amount to each flange (Japanese Patent Laid-Open No. 63-19 / 1988).
No. 2517). As shown in FIG. 8, the straightening device comprises a pair of web restraining rollers 2 for pressing and restraining the web 1-1 of the H-section steel 1 from both sides and a flange 1 of the same shape steel.
-2: a pair of flange pushing rolls 3 which press the ends from the outside to impart independent plastic deformation to both ends of the flanges, and the flange pushing rolls 3 have a variable inclination angle.

Japanese Patent Application Laid-Open No. Sho 54-123565 discloses a press roll 8 having an annular projection for pressing substantially near the center of a flange of an H-section steel 1 and an inside of the flange, as shown in FIG. A plurality of guide rolls 9 are provided. The guide roll 9 has a mechanism for forming an angle α between the web-facing surface and the flange-facing surface larger than 90 degrees and further changing an angle γ with the roll shaft 10 arbitrarily. By applying a constant pressing force to the guide roll 9 for the H-section steel 1 via the press roll 8, the web 1-1 is guided by the guide roll 9.
Has been proposed which corrects the squareness by simultaneously restraining the flange and pressing the flange 1-2.

[0005]

However, among the conventional perpendicularity correcting devices described above, the straightening device shown in FIG. 8 has a shape pattern (a) of the perpendicularity defect of the H-shaped steel shown in FIG. ) To (d), shape patterns (a),
(B) and (c) can correct the squareness defect, but the shape pattern (d) cannot correct the squareness simply by applying a pressing roll from outside the flange and pressing. There is. In addition, since all of those having a poor squareness are scrapped, the yield has to be reduced.

Further, in the case of the straightening device shown in FIG. 9, the flange can only be pressed from the inside of the shaped steel, and the straightness of the shape pattern (d) type can be corrected. The disadvantage is that c-type correction is not possible.

The present invention has been made to solve the above-mentioned drawbacks of the conventional straightening device and to improve the yield of the shaped steel.
(D) It is an object of the present invention to propose a shape steel straightening device capable of straightness correction for all of them.

[0008]

An apparatus for correcting the squareness of a shaped steel according to the present invention comprises a press roll for pressing the center of the shaped steel flange in the width direction from outside, and a web restraining roll for pressing the web from both sides. The gist of the present invention is to have a pair of flange pushing rolls for imparting an independent plastic deformation amount to the end of the flange from the inside and the outside, and a flange restraining roll arranged at the same position as the web restraining roll.

[0009]

According to the present invention, the flange pressing roll is constituted by a pair of flange pressing rolls capable of imparting independent plastic deformation amounts to the outer and inner ends of the flange, whereby the flange is deformed inward. In this case, the end portions of the flange can be independently pressed by a pressing roll pressing from the inside of the flange, and when the flange is deformed outward, by a pressing roll pressing from the outside of the flange.

[0010] Further, the action of the presser roll for pressing the center of the shaped steel flange in the width direction from the outside and the web restraining roll for pressing the web from both sides can prevent the escape of the shaped steel during straightening of the flange.

The reason why the flange restraining roll is provided at the same position as the web restraining roll is a direction in which the center pressing roll in the width direction of the flange presses the center of the flange, and a pair of flange pushing rolls disposed inside and outside the flange. Is to prevent the shaped steel from escaping in the vertical direction when the direction in which the flange end is pressed coincides. This flange restraining roll can be of a variable height position type so as to cope with a change in web height.

In the present invention, the center presser roll of the flange,
The shape steel to be straightened by the web restraining roll and the flange restraining roll is restrained so that the web is perpendicular to the straightening line, and the squareness is corrected based on the web. Therefore, the straightening is performed only by adjusting the flange pushing amount of the flange pushing roll. All the angle-defective shape patterns (a) to (d) can be corrected, and the squareness behavior element after the correction is determined only by the flange pushing amount, so that the adjustment is easy.

A pair of flange pushing rolls disposed inside and outside the flange are integrally assembled by using a blanket or the like, and the bracket is attached so as to be moved inward or outward by a fluid pressure cylinder. The flange can be pressed and corrected according to the deformation direction (inside or outside) of the flange.

[0014]

1 to 4 are schematic views showing the structure of an apparatus according to an embodiment of the present invention when applied to straightening of an H-section steel. FIG. 2 is a schematic view showing a web restraining roll and a flange restraining roll of the straightening device, FIG. 3 is a schematic plan view showing an example of the overall configuration of the straightening device, FIG. A pressing roll for pressing the center in the width direction from the outside, a pair of flange pressing rolls 11 for imparting independent amounts of plastic deformation to the flange ends from the inside and the outside, respectively;
Denotes a web constraint roll, and 13 denotes a flange constraint roll.

A press roll 10 for pressing the center of the H-shaped steel flange in the width direction from the outside is rotatably supported by a bracket 10-1 and is supported by a fluid pressure cylinder 10-2 so that a reduction amount can be adjusted. Have been. This presser roll 1
Numeral 0 is provided opposite to both flanges, so that the upper flange side can be restrained from above when straightening, and the lower flange side can be restrained from below when straightening.

A pair of flange pushing rolls 11 for imparting independent amounts of plastic deformation to the ends of the flanges from the inside and outside respectively are provided. Are rotatably supported at intervals, and are supported by a fluid pressure cylinder 11-4 so as to be able to move vertically. The pair of upper and lower flange pushing rolls 11 are disposed at both ends of the upper and lower flanges, and are configured such that the four brackets 11-1 can move independently.

The web restraining roll 12 presses the web 1-1 from both sides by a pair of left and right restraining rolls 12-3 rotatably supported by a bracket 12-1 supported by a fluid pressure cylinder 12-2. It has a structure to restrain. Further, the flange restraining roll 13 includes a bracket 13.
-1 pair of upper and lower restraining rolls 13 rotatably supported at -1
-2, the upper and lower flanges are restrained, and only the restraining roll 13-2 on the upper flange side is provided so that the height position can be adjusted by the fluid pressure cylinder 13-3 so that the height of the web can be changed. . The restraining roll 13-2 on the lower flange side is fixed.

As shown in FIGS. 3 and 4, the arrangement of the flange center pressing roll 10, the flange pressing roll 11, the web restraining roll 12, and the flange restraining roll 13 is as follows. The web constraining rolls 12 and the flange constraining rolls 13 are respectively provided at the same position to form a set, and the sets are alternately arranged.

As shown in FIG. 5 (A), when the above-described apparatus is used to straighten an H-shaped steel in which the upper flange 1-2 is deformed inward, for example, the bracket 11-1 of the flange pushing roll 11 is subjected to fluid pressure. The flange 11 is moved upward by a cylinder 11-4, and the end of the flange is pressed by a pushing roll 11-3 inside the flange. When the upper flange 1-2 is deformed outward as shown in FIG.
The bracket 11-1 of the flange pushing roll 11 is moved downward in the opposite direction to the above, and the flange end is pressed by the pushing roll 11-2 outside the flange to correct it.

At the time of straightening, the center of the flange is restrained from above or below by the presser roll 10 and the web is restrained from both sides by the web restraining roll 12.
The section steel does not escape when pressed. Further, when the direction in which the flange center pressing roll 10 presses the flange center and the direction in which the flange pressing roll 11 presses the flange end coincide with each other, the vertical escape of the H-section steel is prevented by the flange restraining roll 13. Is done.

In the above-mentioned straightening device, a pair of flange pushing rolls 11 for imparting an independent plastic deformation amount to the flange end from the inside and the outside respectively presses the flange end into one bracket from outside. Although the example in which the roll 11-2 and the roll 11-3 pressing from the inside are attached is shown, the roll 11-2 pressing from the outside is shown.
The same effect can be obtained even if the rolls 11-3 pressed from the inside and the inside are attached to separate brackets and arranged at independent positions. In addition, when there are various sizes of the shaped steel, if the flange pushing roll 11 and the web restraining roll 13 are of a variable width type, it is possible to cope with all sizes. Further, the flange push-in roll 11 can be configured as a vertically integrated device according to the height of the web.

Example 1 An H-section steel shown in FIG. 6 (dimensions: H = 200 mm, W = 100
mm, T ₁ = 3.2 mm, T ₂ = 4.5 mm) 78 pieces (those having poor right-angled shape) were straightened by the straightening device of the present invention shown in FIGS. At that time, the H-section steel 78
In the present example, there were 16 squareness-defective shape patterns (d) shown in FIG. 7 which could not be corrected and were scrapped by the conventional device shown in FIG. 8, but all could be corrected.

[0023]

As described above, according to the apparatus of the present invention, the flange can be corrected in accordance with the deformation direction of the flange. The entire pattern can be corrected, and this has a great effect on improving the yield of the shaped steel.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a single structure of a straightening device in an embodiment of the present invention.

FIG. 2 is a schematic view showing a web restraining roll and a flange restraining roll of the straightening device.

FIG. 3 is a schematic plan view showing an overall configuration example of the straightening device.

FIG. 4 is a schematic side view showing an overall configuration example of the straightening device.

FIG. 5 illustrates an example of a method of straightening an H-shaped steel by the above straightening device, wherein (A) straightens an H-shaped steel whose upper flange is deformed inward, and (B) shows that the upper flange is straightened. It is explanatory drawing in the case of correcting the H-shaped steel deformed outside.

FIG. 6 is an explanatory view showing symbols for indicating dimensions of respective parts of the H-section steel in the embodiment of the present invention.

FIGS. 7A and 7B are diagrams showing examples of a defect pattern of a right angle shape of an H-shaped steel, in which FIGS. 7A and 7B show a shape defect pattern in which a flange is deformed inward and outward, and FIG. (D) is a shape defect pattern in which the flange is deformed inward from the center.

FIG. 8 is a schematic view showing an example of a conventional H-section steel straightening apparatus.

FIG. 9 is a schematic view showing an example of a device for correcting a square shape defect pattern (d) shown in FIG. 7;

[Description of Signs] 1 H-section steel 1-1 Web 1-2 Flange 10 Flange center press roll 10-1 Bracket 10-2 Fluid pressure cylinder 11 Flange press roll 11-1 Bracket 11-2, 11-3 Press roll 11 -4 Fluid pressure cylinder 12 Web restraint roll 13 Flange restraint roll

Claims (1)

(57) [Claims] 1. A press roll for pressing a widthwise center of a flange of a section steel from the outside and a web restraining roll for pressing a web from both sides, and a plastic deformation amount independent from the inside and outside is given to an end of the flange. And a flange restraining roll arranged at the same position as the web restraining roll.