JPH11216614A - Multiline cutting method and device for shape steel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and a device for multiline cutting, which is capable of reducing a shearing force during the multiline cutting of a shape steel. SOLUTION: In the case of almost simultaneously shearing a plurality of shape steels by using a fixed cutter 2 having a plurality of hole forms 2a to 2c adjusted to the sectional shapes of a shape steel 1 and a plurality of moving cutters 3 having similar hole forms 4a to 4c, knockers 6a to 6c for moving the moving cutters 3 are engaged with the moving cutters 3 in taper surfaces, steps are provided in the knockers 6a to 6c, and the knocker heights of the moving cutters 3 are lower in order. Thus, by shifted timings for oblique movements, a shearing force is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a channel steel, comprising a fixed blade and a movable blade having a hole shape adapted to the cross-sectional shape of a shaped steel.
The present invention relates to a multi-section cutting method and an apparatus for simultaneously cutting a plurality of section steels such as an H-section steel, an I-section steel, and a rail.

[0002]

2. Description of the Related Art In cutting a shaped steel, a fixed blade and a movable blade provided with a hole shape corresponding to the cross-sectional shape of the shaped steel are used, and the movable blade is moved obliquely downward with respect to the shaped steel, so that the shaping can be performed in a short time. A method for shearing steel is disclosed, for example, in Japanese Patent Laid-Open No. 2-262908.
JP, JP-A-2616365, JP-A-9-13
No. 6213 is disclosed. However, these cutting methods are for a single section steel, and do not relate to a multi-section cutting method for simultaneously cutting a plurality of sections.

[0003]

However, in order to improve productivity, multi-section cutting of shaped steel has been studied recently. In the case of multi-section cutting, a large-scale shearing member capable of withstanding a shear force of 500 TON to 800 TON. Machine is needed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and an object of the present invention is to provide a multi-section cutting method and a multi-section cutting method capable of reducing a shearing force in multi-section cutting of a shaped steel. I do.

[0005]

SUMMARY OF THE INVENTION According to the present invention, there is provided a multi-section cutting method for a shaped steel according to the present invention. A cutting method of shearing a plurality of shaped steel members substantially simultaneously by moving the plurality of movable blades in an oblique direction with respect to each of the shaped steel members using a blade, wherein the skew operation of each of the plurality of movable blades (each By shifting the timing of moving the movable blade obliquely downward, the shearing force is reduced.

In addition, a multi-section cutting device for a shaped steel according to the present invention includes a fixed blade having a plurality of holes corresponding to the cross-sectional shape of the shaped steel, and a blade overlapped with the fixed blade and having the same shape as the hole. It is provided with a plurality of movable blades each having a hole shape, and pressing means provided on each of the plurality of moving blades, and each knocker height of the pressing means is sequentially reduced.

In the present invention, since a plurality of movable blades are skewed in order to shear the section steel with the fixed blade, the shearing force required by the shearing machine is equal to the number of the section steels. Irrespective of the above, the force required for shearing a single section steel is sufficient, and an increase in the size of the shearing machine can be avoided.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a side view partially showing the outline of a multi-row cutting device of the present invention, and FIG. 2 is a front view. Here, a multi-row cutting device for three channel steels is illustrated. In FIGS. 1 and 2, reference numeral 1 denotes a section steel as a material to be cut, which is inserted into the cutting device in parallel in a normal posture. Reference numeral 2 denotes a fixed blade, which has a hole shape 2a, 2b, 2
c is provided. Reference numeral 3 denotes divided moving blades, each having a hole shape 4a, 4b, 4c having the same shape and the same size as the hole shape 2a, 2b, 2c of the fixed blade 2, and each of them moves obliquely downward. . 5 is a moving blade 4a, 4
b, a guide block for regulating the moving direction of 4c, 6a,
Reference numerals 6b and 6c denote knockers for moving the movable blades 3, which are pushed down by a ram 10 of a cutting machine, for example.
The knockers 6a, 6b, 6c and the movable blades 3 are respectively engaged with tapered surfaces. 7 is a return spring of each movable blade 3. The knockers 6a, 6b, and 6c respectively have ΔH
The knocker height is reduced (or increased) in order by providing steps.

Since the present cutting device is constructed as described above, the fixed blades 2 and the respective cavities 2a to 2c of the movable blades 3,
The shape steel 1 is passed through 4a to 4c, and then the ram 10 of the shearing machine is lowered to sequentially push down the knockers 6a, 6b, 6c. In the case of FIG. 2, first, the left knocker 6a is pushed down, whereby the left section steel 1 is cut first. Next, the center knocker 6b is pushed down, the center section steel 1 is cut second, and finally the right knocker 6c is pushed down, and the right section steel 1 is cut. Therefore, the shearing force required by the shearing machine may be the force required for shearing one section steel regardless of the number of sections,
It is possible to reduce the shearing ability of the shears, thereby avoiding upsizing of the shears.

[0010]

As described above, according to the present invention,
In the case of using a fixed blade having a plurality of hole shapes corresponding to the cross-sectional shape of the shape steel and a plurality of moving blades each having the same shape, when shearing a plurality of shape steels almost simultaneously,
Since the timing of the skew operation of each moving blade is shifted, a shearing machine having a shearing force required for shearing one shaped steel may be used regardless of the number of shaped steels. A large size can be avoided, and productivity can be increased with a small-scale facility.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional side view of a multiple cutting device of the present invention.

FIG. 2 is a front view of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Section steel 2 Fixed blade 2a, 2b, 2c Hole type of fixed blade 3 Moving blade 4a, 4b, 4c Hole type of each moving blade 5 Guide block 6a, 6b, 6c Knocker 7 Return spring 10 Ram

Claims (2)

[Claims] 1. A fixed blade having a plurality of cavities corresponding to a cross-sectional shape of a shaped steel, and a plurality of moving blades each having a similar morphology. A cutting method in which a plurality of shaped steel members are sheared almost simultaneously by moving in an oblique direction, wherein a shear force is reduced by shifting a timing of a skew operation of the plurality of moving blades. Multi-section cutting method. 2. A fixed blade having a plurality of cavities corresponding to a cross-sectional shape of a shaped steel; a plurality of movable blades superimposed on the fixed blade, each having a morphology similar to the morphology; And a push-down means provided on each of the movable blades, wherein the knockers of the push-down means are sequentially lowered in height.