JPH09314239A - Machine for bending metallic material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily enable bending metallic materials such as a metallic strip and angle bar into a circular body having high out-of-roundness and, furthermore, to enable mass-production of the high-quality circular body without variation in the quality. SOLUTION: The bending machine 1 for metallic materials is a machine for forming the metallic circular body by adding pressure in a bending direction to the metallic materials. Plural pairs of pressure rolls 3, 3 between which the metallic materials is held are arranged so that the opposed parts of each pair is situated on the circumference where the circular body after working becomes a circle having a prescribed diameter. While pressurizing the metallic material to be bent between the plural pairs of pressure rolls 3, 3, the material is successively moved and formed into the circular body. The plural pairs of the pressure rolls 3, 3 are arranged in the range of approximately 90 deg. on the circumference where the circular body after working becomes a circle having the prescribed diameter.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal material bending machine for processing a metal material such as a metal strip or an angle material into a circular body having a predetermined diameter.

[0002]

2. Description of the Related Art Conventionally, a universal bender for general purpose machines has been used for bending metal materials such as metal strips and angle materials.

Bending of a metal material by this universal bender is performed by two rolls a and b as shown in FIG.
With three rolls, the movable roll c between them, the metal material d is finished into a circular body while applying pressure in the bending direction.

[0004]

As described above, in the bending of the metal material by the conventional universal bender, as is apparent from the processing mode shown in FIG. 5, the bending of the metal material is performed. On the other hand, in order to make a circular material with a high roundness, it is necessary to have a high degree of skill and to perform a correction process many times to obtain a roundness. Not only is the level of difficulty high, but the work is extremely complicated. In particular, in the case of bending an L-shaped angle member, not only is it difficult to bend to a high roundness, but also the L-shaped brim portion is irregularly deformed and the portion is bent at a right angle. The actual situation is that the product of the required quality cannot be obtained because it is not finished.

Therefore, the present invention has an object to solve the above-mentioned conventional technical problems, and easily converts a metal material such as a metal strip plate or an angle material into a circular body having a high circularity. An object of the present invention is to provide a metal material bending machine capable of bending and mass-producing a high-quality circular body having no quality variation.

[0006]

In order to achieve the above object, a bending machine for metallic materials according to the present invention applies a bending pressure to the metallic material to form a circular body of the metallic material. A machine, in which a plurality of pairs of pressure rolls sandwiching a metal material are arranged such that the facing portions of each pair are located on the circumference of a circular body after processing, which is a circle having a predetermined diameter, and the metal is bent. The material is sequentially moved while being pressed between the plurality of pairs of pressure rolls to form a circular body.

In the bending machine for metallic materials according to the present invention, in the above construction, a plurality of pairs of pressure rolls are arranged in a range of about 90 degrees on the circumference where the circular body after processing becomes a circle having a predetermined diameter. It is preferable to adopt the above configuration.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a plan view showing an outline of a bending machine for metal materials, FIG. 2 is a front view of the same, and FIG. 3 is a front view of a roll used for bending an L-shaped angle material.
FIG. 4 is an explanatory view showing a bending process of the L-shaped angle member.

In FIG. 1 and FIG. 2, reference numeral 1 is a bending machine for metallic materials. This bending machine 1 has a machine base 2 in which a plurality of pairs of pressure rolls 3 are horizontally arranged. It is configured. The plurality of pairs of pressure rolls 3, 3 are provided in a range of approximately 90 degrees on the circumference, and the facing intervals of the pressure rolls 3, 3 of each pair are located on the circumference. In the illustrated embodiment, five pairs of pressure rolls 3 and 3 are provided. This circumference is
The diameter of the circular body after processing is set to be a circle with a predetermined diameter, and is usually set smaller than the diameter of the circular body after processing in consideration of the degree of restoration after bending the metal material. .
The pressure rolls 3 and 3 of each pair are radially arranged with respect to the center point of the circumference, and the position in the radial direction is adjustable. Reference numeral 4 is a position adjusting operation portion of the pressure rolls 3 of each pair. The facing distance between the pressure rollers 3 and 3 of each pair can be adjusted according to the thickness of the material to be processed. A is a material insertion side, and B is a material delivery side.

The pressure rollers 3 and 3 of each pair are rotationally driven in the material feeding direction by a power driving mechanism. 5
Is an electric motor of a power drive mechanism, 6 is its reduction pulley, 7 is a control panel, and 8 is an operation switch.

Various pressure rolls are selected and used according to the metal material to be bent. The pressure rolls 3 and 3 used for bending the L-shaped angle material shown in FIG.
One of the pressure rolls 3 is circular, and the other pressure roll 3 is provided with a groove portion 9 for sandwiching the flange of the L-shaped angle member.

An example of the metal material that is bent by the bending machine 1 according to the present invention is a true circular angle flange that constitutes the body of a cylindrical grain drying and storage machine. FIG. 4 shows the bending mode.

As shown in FIG. 4A, the L-shaped angle member 10 has a straight shape, and one end of the L-shaped angle member 10 is located at the frontmost pressure roll from the material insertion side A of the bending machine 1. If inserted between 3 and 3, the L-shaped angle member 10 is sequentially fed between the pressure rolls 3 and 3 which are driven in the material feeding direction, as shown in FIGS. Is bent in a circular direction and is sent out from the material sending side B. Therefore, by repeating this molding process three times, as shown in FIG.
It is bent into a perfect circle as shown in (d). Since both ends of the bent L-shaped angle member 10 remain straight, the parts are cut to form a true circular body.

As described above, according to the bending machine 1 of the present invention, the metal material is pressed from the material insertion side A to the pressure rolls 3, 3.
A circular body with a high roundness can be easily processed by repeating the work of inserting it between them, and the circular body with high quality can be mass-produced.

As in the illustrated embodiment, a plurality of pairs of pressure rolls 3, 3 are arranged in a range of approximately 90 degrees on the circumference, so that the material insertion side A and the material delivery side B are formed. Since a large working space can be secured, the work of inserting the metal material on the material insertion side A and the work of taking out the metal material on the material delivery side B can be performed without any trouble. In particular, even after being bent into a circle, it can be easily taken out.

In the embodiments of the present invention described above, the bending of the true circular angle flange constituting the body of the cylindrical grain drying and storage machine has been illustrated, but various other shape bending materials may be bent. You can Further, the bending machine for a metal material according to the present invention is versatile and versatile in that it can perform not only a perfect circular bending work but also an appropriate arc-shaped bending work.

[0017]

According to the present invention, a metal material such as a metal strip or an angle member can be easily bent into a circular body having a high roundness, and high quality without variation in quality. It is possible to obtain a metal material bending machine that can mass-produce a circular body.

[Brief description of drawings]

FIG. 1 is a plan view showing an outline of a bending machine for metallic materials according to an embodiment of the present invention.

FIG. 2 is a front view showing an outline of a bending machine for metallic materials according to an embodiment of the present invention.

FIG. 3 is a front view of a roll used for bending an L-shaped angle member.

FIG. 4 is an explanatory diagram showing a bending process of an L-shaped angle member.

FIG. 5 is a schematic view showing a bending process of a metal material by a conventional universal bender.

[Explanation of symbols]

 1 Bending machine 2 Machine stand 3,3 Pressure roll 4 Position adjustment operation part 5 Electric motor 6 Reduction pulley 7 Control panel 8 Operation switch 9 Groove part 10 L-shaped angle material

Claims (2)

[Claims] 1. A metal material bending machine for forming a circular metal body by applying pressure in the bending direction to the metallic material, wherein a plurality of pairs of pressure rolls sandwiching the metallic material are Arranged so that the facing portions of each pair are located on the circumference of a circle having a predetermined diameter, the metal material to be bent is sequentially moved while being pressed between the plurality of pairs of pressure rolls to form a circular body. A bending machine for metallic materials, which is characterized in that 2. The metal material according to claim 1, wherein the plurality of pairs of pressure rolls are arranged in a range of about 90 degrees on the circumference where the processed circular body becomes a circle having a predetermined diameter. Bending machine.