JPS61216831A - Production of long sized shape steel - Google Patents

Abstract

PURPOSE:To obtain the long sized shape steel having high strength by splitting the plate thickness of a metallic strip by a wedge shaped tool upto the midway from one side of the width direction to the other side and by forming the both leg parts so as to become symmetrical together with rounding the bottom of the split groove after forming two leg parts. CONSTITUTION:A metallic plate 1 is cleaved the cleaving roller 21 fixed by a driving shaft 22. The groove part 20 of the strip 1A which cleaved upto the prescribed depth by performing the cleaving with using of the cleaving roller 21 one or several times is rounded by a groove forming roller 31. This strip 31 is formed by forming rollers 41, 43, 45 to the shape steel 10 of T shape, I shape, etc. The shape steel formed as the above is especially suitable for the guide rail of elevator due to the strength and reliability being enabled to be increased.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a method of manufacturing a section whose cross section is shaped or shaped, and particularly relates to a method of manufacturing a section of a long section suitable for a guide rail of an elevator. Regarding the manufacturing method.

[Background of the invention]

Conventionally, elevator guide rails were developed in 1974-42
As described in Japanese Patent No. 361, thin steel plates bent into a substantially T-shape or T-shaped sections were purchased and cut. However, since the former has a hollow structure, its range of use is limited in terms of strength. Moreover, the latter has a problem of poor material yield.

[Purpose of the invention]

An object of the present invention is to provide a method for manufacturing a solid elongated section that does not require cutting.

[Summary of the invention]

The present invention provides a tearing device that tears the thickness of a metal strip from one side in the width direction to the other side, and a groove bottom processing that increases the roundness of the groove bottom of the split metal strip. It consists of a device, a forming device that forms the torn metal strip symmetrically over the entire length, and a moving device that moves each of these devices and the metal strip relatively in the longitudinal direction. The metal strips are sequentially torn apart to form one leg of the bottom.

[Embodiments of the invention]

FIG. 1 is a schematic diagram illustrating an example of a process according to a method for manufacturing a shape according to the present invention. In the figure, the metal strip 1 is torn by a tearing roller 21 fixed to a drive shaft 22. As shown in FIG. The tearing roller 21 is formed into a roughly abacus bead shape with a wedge-shaped outer peripheral edge. This tearing roller 21
The outermost periphery of the sheet is torn to a predetermined depth by using the tearing roller 21 once or several times to work between the folds, which is preferably as sharp as possible in order to improve processing efficiency. The shape of the outermost periphery of the tearing roller 21 is transferred to the bottom part 20 of the groove of the band plate IA, resulting in a sharp shape 1. It's becoming kind.

When a section formed by forming the strip plate 11A with the groove bottom 20 sharp as it is is used in a part such as a beam where bending force is applied, stress concentration due to the notch effect is expected at the groove bottom 20. The above problem is expected.

To prevent stress concentration due to the notch, this groove bottom 2
An example of this method is to round off the groove forming roller 31, which has a radius larger than the rounded radius at the tip of the tearing roller 21 used in the tearing process. Press against the groove bottom 20 of plate IA. Alternatively, the groove bottom may be rounded by tearing with a very small amount of pushing.In this way, the groove bottom 3 with a large radius of roundness can be formed.
0 is formed.

This strip plate IB is shaped by forming rollers 41, 43, 45 to form a shape 10 such as a figure 7 or an engineering shape.

FIG. 2 shows an example of a T-shaped shape formed through these steps, and shows the bottom part 30 of the torn groove of this shape 10A.
is rounded with a large radius.

By performing the steps shown in FIG. 1 simultaneously from above and below the strip 1, the engineered shape 1 shown in FIG. 3 can be obtained.
0B can be molded.

FIG. 4 is a schematic diagram showing an example of a shape processing apparatus according to the present invention. Metal strip 1 is ready for delivery! ! 11 to conveyor device 5A
is supplied to the tearing device 2.

In this tearing device 2, the metal strip 1 is torn by a tearing roller. The metal strip IA torn by the tearing device 2 is conveyed to the groove forming device 3 by the conveying device 5B. The groove forming device 3 is a groove forming device that shapes the bottom of the groove by using a groove forming roller whose tip end has a radius larger than that of the tearing roller used in the tearing device 2. 3
As a result, the metal strip IB, which has been torn and rounded at the bottom of the groove, is conveyed to the forming device 6 by the conveying device 5C, and is formed into the shape member 10. The profile 1o is measured and cut to a predetermined length by a cutting machine 6 to have a constant length, and then taken out by a carry-out device 12.

In this embodiment, a case has been described in which a tearing roller is used to tear the material 1.

The tearing may be performed using a cutter; similarly, a groove forming mold may be used instead of a groove forming roller.

Note that 4 in Figure 1 is the molding device 22, 32, 42°44.48
is the roller axis.

〔Effect of the invention〕

According to the present invention, stress concentration on the groove bottom after tearing can be alleviated, so the strength and reliability of the profile can be improved.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a method for manufacturing a long profile according to an embodiment of the present invention, FIG. 2 is a perspective view of a long profile formed by the method according to an embodiment of the present invention, and FIG. FIG. 4 is a perspective view of a long profile formed by a method according to another embodiment of the present invention. FIG. 4 is a schematic illustration of an example of an apparatus for manufacturing a long profile of the present invention. DESCRIPTION OF SYMBOLS 1... Metal strip plate, 2... Tearing device, 3... Groove forming device, 4... Forming device, 21... Tearing processing roller,
31... Groove forming roller, 10. IOA, IOB...
shape material.

Claims (1)

[Claims] 1. A first step of splitting the thickness of the metal strip plate along its entire length from one side in the width direction to the other side with a wedge-shaped tool to form two legs; a second step in which the bottom of the split groove is rounded using a tool with a radius larger than the radius of the tip of the wedge-shaped tool used in the step; and a third step in which the two legs are formed symmetrically. 1. A method for manufacturing a long shaped material, which is characterized by the following steps: