JPH1110241A - Steel shape bending device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a steel shape bending device in which the steel shape is smoothly fed, a larger roll diameter for bending is not required and a skilled worker is not required. SOLUTION: In the steel shape bending device in which a forming roll consisting of an upper roll 10 and a lower roll 8 to hold a steel shape A to be bent is arranged in the direction orthogonal to the longitudinal direction of the steel shape, further, forming rolls 11 consisting of the upper roll 10 and the lower roll 8 are arranged to both sides of the forming roll, the forming roll 11 is arranged as facing to side faces of each forming roll, The lower roll 8 formed with its upper face in the horizontal plane is arranged to a vertical lower shaft 7, the upper roll 10 forming a rear face to a conical face is arranged to an upper shaft 9 with inclining against a vertical shaft as facing the lower roll in the vertical direction. Further, following a final stage forming roll, a pressing roll 13 for inner bending is arranged movable in the direction orthogonal direction of the longitudinal direction of the steel shape to be bent.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a section bending apparatus for bending a section steel such as an equilateral angle steel or a non-equilateral angle steel used for a rib or a structural material of a ship in a longitudinal direction.

[0002]

2. Description of the Related Art Conventionally, section steels such as equilateral angle steel or unequal angle iron used for ship ribs or structural materials are:
Outer bending, inner bending, or both bending processes are performed in the longitudinal direction.

FIG. 6 is a perspective view of a bent section steel.

[0004] An outer bending R1, R2, R3, R4 and an inner bending R5 are performed on the shaped steel in the longitudinal direction of the shaped steel by a bending machine.

[0005] There is a method by press bending for bending a shaped steel, and the bending by this method is performed by repeatedly bending a shaped steel, bending the shaped steel, releasing the holding, and advancing the shaped steel. is there. The press bending is a partial bending, and the pressing bending is performed at a certain interval, so that accurate bending cannot be performed, and there is a problem that a space is formed between the outer plates and a sufficient strength of the hull cannot be maintained. In press bending,
Since the steps of holding, bending, holding and releasing the shape steel are repeated, the rate is extremely impossible. Since the pressurization and release of the hydraulic pressure are repeated constantly, there are many failures of the hydraulic device.

Further, a method using a forming roll is used for bending a section steel. Japanese Patent Application Laid-Open No. Hei 6-297044 discloses an upper roll and a lower roll for holding a section steel to be bent. A forming roll supported on the same shaft is provided movably in a direction orthogonal to the longitudinal direction of the section steel to be bent,
Further, on both sides of the above-mentioned forming rolls, forming rolls which support the upper roll and the lower roll on the same axis are arranged on the same axis, and a section steel bending having a pressing roll provided on the side face of each forming roll. An apparatus is disclosed.

FIG. 7 is a plan view of a conventional section steel bending apparatus provided with a forming roll, and FIG. 8 is a view showing a state in which the section steel is held between the forming rolls.

In the conventional section bending machine, the lower roll 8 and the upper roll 10 which hold the section A on the slide base 1a which slides in the direction perpendicular to the longitudinal direction of the section A to be bent are the same. Forming roll supported by shaft and forming roll
A pressing roll 11 is provided opposite to the forming roll, and a lowering roll 8 and an upper roll 10 which similarly hold the shaped steel A at both sides of the forming roll and a pressing roll 11 and a pressing roll 11 are supported. Provide.

[0009] The bending by the above-mentioned section bending machine is as follows.
The section steel A is set between the lower roll 8, the upper roll 10 and the pressing roll 11, and the forming roll and the pressing roll 11 on the slide base 1a are moved in a direction orthogonal to the longitudinal direction of the section steel A. The rolls 8, 10, and 11 are rotated to apply a longitudinal feed to the section steel A, and the section steel A is bent while being moved.

[0010]

Since the lower surface of the upper roll of the conventional bending device for a shaped steel is a horizontal surface, the horizontal surface which is in contact with the surface of the shaped steel during bending of the shaped steel is separated from the surface of the shaped steel by rotation and again. Immediately after coming into contact with the surface of the section steel, the rotation direction of the horizontal plane does not match the feed direction of the section steel, so the section steel does not move smoothly. Therefore, skill is required in order to perform continuous bending, and it is not possible to perform bending to a predetermined curvature without careful attention.

Further, when the size of the section steel is increased, the upper roll and the lower roll are supported on the same shaft, and it is necessary to prevent the section steel from contacting the shaft. Not only is required, but also the overall size of the machine is unnecessarily large. For example, when processing a long side of a trapezoidal angle iron having a length of 400 mm, the roll diameter is 110 mm.
About 0 mm is required.

Further, when it is necessary to bend the shape steel outward and inward, the conventional bending device can perform only one bending process, so that it takes time to set up the work.

According to the present invention, there is provided a section bending apparatus provided with a forming roll, wherein the section steel can be smoothly fed, and it is not necessary to increase the roll diameter even when bending a section steel having a large dimension.
It is another object of the present invention to provide a steel bending device which does not require skill in bending.

[0014]

According to the present invention, there is provided a section bending apparatus for bending a section steel, which comprises an upper roll and a lower roll for holding the section steel to be bent in a direction perpendicular to the longitudinal direction of the section steel. A shaped steel bending apparatus comprising: a forming roll movably provided; a forming roll including an upper roll and a lower roll disposed on both sides of the forming roll; and a pressing roll provided on a side of each forming roll. The lower roll, whose upper surface is formed in a horizontal plane, is provided on the vertical lower shaft, and the upper roll, whose lower surface is formed in a conical surface, is provided on the upper shaft, which is inclined with respect to the vertical axis, and is vertically opposed to the lower roll. And

Further, by providing a pressing roll for inner bending movable in a direction perpendicular to the longitudinal direction of the section steel to be bent next to the forming roll at the final stage, the outer bending and the inner bending can be performed simultaneously.

Further, the bending ratio can be adjusted by making at least one of the forming rolls on both sides movable in the longitudinal direction of the section steel to be bent.

[0017]

1 is a perspective view, FIG. 2 is a side view, and FIG. 3 is a schematic plan view of a section steel bending apparatus according to the present invention.

On the fuselage 1, three frames 2, 3 and 4 are juxtaposed in the longitudinal direction of the section steel A to be formed. The central movable base 3 is movable on the slide base 1a in a direction orthogonal to the longitudinal direction of the section steel A by moving the axis forward and backward by a cylinder 5 provided behind the central movable base 3.

Also, on both sides of the central movable platform 3,
4 are arranged. At least one of the mounts 2 and 4 is movably provided in the longitudinal direction of the shaped steel A by rotating a screw by a motor 6 on the side of the machine body, and is bent by moving the mounts 2 and 4. The bending rate of steel can be adjusted. On each of the frames 2, 3, and 4, a forming roll composed of a lower roll 8 mounted on a vertical lower shaft 7 and an upper roll 10 mounted on an upper shaft 9 slightly inclined with respect to the vertical axis. Is provided, and the lower roll 8 and the upper roll 10 are provided so as to oppose each other in the vertical direction. The section steel A is held between the upper surface of the lower roll 8 and the lower surface of the upper roll 10. At least one of the lower roll 8 and the upper roll 10 can be moved up and down so that various shaped steels having different thicknesses can be clamped.

A pressing roll 11 is provided so as to face the forming roll, and a section steel A is formed between the forming roll and the pressing roll 11.
Sandwich. The pressing roll 11 is rotated by a rotary drive device 12 such as a hydraulic motor.

Further, the distance between the pressing roll 11 and the forming roll pressing roll 11 can be adjusted in accordance with the thickness of the section steel A sandwiched between the forming roll.

FIG. 4 is a view showing a state in which the section steel A is held between the lower roll 8, the upper roll 10, and the pressing roll 11.

The upper surface of the lower roll 8 mounted on the lower shaft 7 is a horizontal surface, whereas the lower surface of the upper roll 10 mounted on the upper shaft 9 is a cone inclined by an angle θ with respect to the horizontal surface. Formed on the surface. The conical surface of the upper roll 10 is shaped steel A
It is necessary to contact the shape steel surface during bending
The upper shaft 9 on which the upper roll 10 is mounted is at an angle θ with respect to the vertical axis.
Incline.

The inclination angle of the conical surface is determined by the rotational direction of the contact surface of the upper roll 10 immediately after the conical surface in contact with the shaped steel surface separates from the shaped steel surface and contacts the shaped steel surface again during bending. It is necessary to set the angle along the traveling direction of the steel, but the angle θ is usually in the range of about 1 ° to 3 °.

When the shaped steel A is to be bent inward, an inner bending pressing roll 13 which moves forward and backward in a direction orthogonal to the longitudinal direction of the shaped steel is provided next to the final forming roll. By providing the press roll 13 for inner bending, the outer bending and the inner bending can be simultaneously performed on the section steel A.

Next, a method of using the section steel bending apparatus of the present invention will be described.

FIG. 5 is a schematic view showing a state in which a section steel is bent.

The section steel A is placed between the lower roll 8, the upper roll 10 and the pressing roll 11, and the lower roll 8 or the upper roll 10
Is moved up and down to hold the section steel A between the lower roll 8 and the upper roll 10, and the pressing roll 11 is moved to the lower roll 8 side to sandwich the section steel A with the lower roll 8.

Next, the center movable gantry 3 is moved in a direction orthogonal to the longitudinal direction of the section steel A according to a desired curvature, and the section steel A is set between the rolls 8, 10, and 11.

Further, in the case of inward bending, the press roller 13 for inward bending is moved in a direction orthogonal to the moving direction of the in-section steel A at the stage of setting the in-section steel A.

After the setting of the section steel A is completed, when the rolls 8, 10, and 11 are rotated, a longitudinal feed is applied to the section steel A, and the section steel A moves in a direction orthogonal to the feed and the longitudinal direction. The gantry 3 is bent by the lower roll 8, the upper roll 10 and the pressing roll 11. Further, the inner bending can be performed by the inner bending pressing roll 13.

[0032]

According to the conventional roll bending, the length of the long side is from 100 mm to 400 mm, the center of the receiving roll becomes large, the bending accuracy is reduced with small angle material, buckling occurs, and the bending with small curvature is performed. However, according to the present invention, the upper roll and the lower roll constituting the forming roll are separated and separately supported by the lower shaft and the upper shaft, and the lower surface of the upper roll is formed as a conical surface. Since there is no through shaft, there is no need to increase the diameter of the forming roll even if the shape of the section steel increases, and the bending apparatus can be made compact.

Also, since the lower surface of the upper roll is a conical surface, no excessive force is applied to the shaped steel, so that the bending of the shaped steel can be performed smoothly without any skill.

[Brief description of the drawings]

FIG. 1 is a perspective view of a shaped steel bending apparatus according to the present invention.

FIG. 2 is a side view of the section steel bending apparatus of the present invention.

FIG. 3 is a schematic plan view of the section steel bending apparatus of the present invention.

FIG. 4 is a view showing a state in which a shaped steel is held between a forming roll and a pressing roll.

FIG. 5 is a schematic plan view showing a state in which a section steel is bent.

FIG. 6 is a perspective view of a bent steel section.

FIG. 7 is a schematic plan view of a conventional section bending machine having a forming roll.

FIG. 8 is a view showing a state in which a section steel is clamped by a molding roll of a conventional section steel bending apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Airframe 1a Slide base 2, 3, 4 Stand 5 Cylinder 6 Motor 7 Lower shaft 8 Lower roll 9 Upper shaft 10 Upper roll 11 Press roll 12 Rotary drive 13 Press roll for internal bending A Section steel

Claims (3)

[Claims] 1. A forming roll comprising an upper roll and a lower roll for holding a shaped steel to be bent is movably provided in a direction orthogonal to the longitudinal direction of the shaped steel, and is further provided on both sides of the forming roll. In a section steel bending apparatus in which a forming roll composed of a roll and a lower roll is arranged, and a pressing roll is provided opposite to the side surface of each forming roll, a lower roll having an upper surface formed in a horizontal plane is a vertical lower shaft. And an upper roll having a lower surface formed in a conical surface and provided on an upper shaft that is inclined with respect to a vertical axis and vertically opposed to a lower roll. 2. The bending of a section steel according to claim 1, further comprising an inner bending pressing roll movable in a direction perpendicular to the longitudinal direction of the section steel to be bent next to the last-stage forming roll. apparatus. 3. The bending machine according to claim 1, wherein at least one of the forming rolls on both sides is movable in the longitudinal direction of the steel bar to be bent.