JP2001327882A - Steel shearing blade - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a steel shearing blade capable of stably holding and surely shearing steel without generating slip at an optional position of a shearing edge. SOLUTION: Recessed and projecting parts 4a, 4b and 4c to suppress the slip of the steel are formed in the upper and lower end faces, the left and right side faces or in the vicinity of the shearing edge of plate like steel rectangular parallelepiped shaped steel shearing blades 1a, 1b and 1c attached to the upper and lower jaws of a shearing unit having steel shearing function.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel shearing blade mounted on a boom tip of a power shovel and mounted on a shearing unit for shearing steel, and more particularly, to preventing the steel from slipping when shearing steel. The present invention relates to a steel material shearing blade with improved bite and improved cutting performance.

[0002]

2. Description of the Related Art A shearing unit such as a shearing machine 10 shown in FIG. 3A and a crushing shearing machine 11 shown in FIG. Of the steel material shearing blade 12
3 '), 14 (14'). This steel material shearing blade 12 is formed into a plate shape (a straight blade is a plate-like rectangular parallelepiped shape) by cutting steel, and upper and lower jaws 13 of a shearing machine 10 and a crushing shearing machine 11 are formed by a plurality of bolts.
(13 '), 14 (14'), blade 1
The steel material sandwiched between the two shearing edges is sheared by the force of the upper and lower jaw opening / closing cylinders 15 and 16.

[0003]

The surface of a conventional steel shearing blade 12 is finished smoothly, and the shearing edge has a substantially straight shape without any irregularities. Such a shearing edge without unevenness does not cause any particular problem if the position or posture of the steel material is stable when closing the upper and lower jaws, but as the upper and lower jaws 13 (13 ') and 14 (14') close, In the case of slipping and moving to the tip side of the chin, the power of the upper and lower jaw opening / closing cylinders 15 and 16 does not work effectively, and it may take time to shear the steel material. The upper and lower jaws 13 (13 ') and 14 (1
4 ') Some units have one or both intermediate parts bent in a "U" shape or concave arc shape. However, if bent in a U shape, separate steel material shearing blades are provided before and after the bent part. Therefore, there is a problem that the number of blades to be used increases, and there is a problem that the life of the blade is shortened because the steel material shearing position is concentrated on the bent portion. In addition,
A similar problem arises with a concave arcuate jaw.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to stably pinch a steel material without causing slip at an arbitrary position of a blade shearing edge and to surely shear the steel material. It is an object of the present invention to provide a blade for shearing steel.

[0005]

According to the present invention, there is provided a steel-shearing blade according to the present invention, which is a plate-shaped steel-shearing blade attached to upper and lower jaws of a shearing unit having a steel-shearing function. Characterized in that an uneven portion is formed on the shearing edge of the above. The uneven portion,
Specifically, it can be formed on the upper and lower end surfaces of the blade, the left and right side surfaces, or near the shearing edge.

[0006] When the steel material is sandwiched between the upper and lower jaws, the uneven portion cuts into the surface of the steel material and the slip is suppressed. In this state, when the upper and lower jaws are further closed, the steel material does not slip and the first clamping is performed. Shearing is ensured near the position.

[0007]

Embodiments of the present invention will be described below. 1 (A) to 1 (C) show three types of steel shearing blades 1a, 1b, 1c according to an embodiment of the present invention. Each of the steel shearing blades 1a to 1c has a plate-like rectangular parallelepiped shape, and bolts are respectively inserted into three bolt holes 2 formed through the thickness direction thereof, so as to be attached to the side surfaces of the upper and lower jaws of the shearing unit. ing. Then, in order to use the four shearing edges 3 in the longitudinal direction of the blades 1a to 1c evenly, when the life of one shearing edge 3 comes to an end, the blades 1a to 1c are once removed and turned upside down or turned upside down, and the unused shearing edges are used. Reattach the edge 3 to the position for use.

FIG. 1A shows an uneven portion 4a formed on the upper and lower end surfaces of the blade 1a, and the direction of the streaks of the uneven portion 4a is perpendicular to the longitudinal direction of the blade 1a. The basic shape of the concave and convex portion 4a is a shape in which peaks and valleys are formed into a smooth curve and appear to be wavy when the concave and convex portion 4a is viewed from the side. The projection may be slightly pointed.

Next, FIG. 1B shows an example in which the upper and lower end surfaces of the blade 1b are kept flat, and the uneven portions 4b are formed on the left and right side surfaces. The stripe direction of the uneven portion 4b is the blade 1
The direction is orthogonal to the longitudinal direction of b. Therefore, when the blade 1b is viewed from above, the both side edges of the upper end surface are uneven, and the unevenness digs into the steel material surface. FIG. 1 (C) shows an example in which the uneven portion 4c is formed only in the vicinity of the shearing edge 3 of the blade 1c. The processing cost of the uneven portion 4c can be reduced by limiting the area where the uneven portion 4c is formed. .

The shearing blades 1a to 1c according to the present invention are constructed as described above. The blade 1a shown in FIG. 1A will be described as an example.
For example, when the upper jaw is closed with the round steel material 5 interposed between a,
The uneven portions 4a of the upper and lower blades 1a bite into the surface of the round steel material 5 to suppress the slip of the round steel material 5. As a result, the round steel 5 can be quickly sheared at the first clamping position. In the case of the conventional blade having no uneven portion 4a as described above, the round steel material 5 escapes to the blade tip side in the direction perpendicular to the paper surface, so that the force of the upper and lower jaw opening / closing cylinder can be effectively applied to the round steel material 5. It is not possible, and it takes extra time for shearing round steel.

Although the embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, but can be variously modified.
a, 4b, 4c were formed over the entire length of the blade,
Needless to say, the uneven portions 4a to 4c may be formed at predetermined intervals to save processing time. In addition, the corrugated shape of the concave and convex portions 4a to 4c may be changed to another shape (for example, an aggregated shape of a large number of minute projections, an inclined groove or a knurled cross-shaped groove) as needed. Further, although the above embodiment relates to the straight blades 1a to 1c, the present invention is naturally applicable to a blade of an arc blade, and in this case, the direction of the streaks of the concave and convex portions is the same as that of the arc blade. Any direction that intersects the shearing edge may be used.

[0012]

As described above, according to the present invention, since the uneven portion is formed on the shearing edge of the steel material shearing blade, the unevenness cuts into the surface of the steel material sandwiched between the blades, thereby suppressing the slip of the steel material. The steel material can be quickly sheared at almost the same position as the position where the steel material is first sandwiched, and the steel material can be sheared at any position of the blade, so that the sheared edges of the blade can be used evenly and the blade life can be shortened. Can be improved.

[Brief description of the drawings]

1A is a perspective view of a shearing blade according to a first embodiment of the present invention, FIG. 1B is a perspective view of a shearing blade according to a second embodiment of the present invention, and FIG. The perspective view of the shearing blade concerning 3rd Embodiment.

FIG. 2 is a cross-sectional view of a vertical shear blade when steel is sheared.

3A is a perspective view of a steel shearing machine, and FIG. 3B is a side view of an upper jaw of the steel shearing machine.

FIG. 4 is a perspective view of a steel material crushing and shearing machine.

[Explanation of symbols]

 1a-1c Blade for steel shearing 4a-4c Uneven portion 2 Bolt hole 5 Round steel

Claims (4)

[Claims] 1. A plate-shaped steel-shearing blade attached to upper and lower jaws of a shearing unit having a steel-shearing function, wherein an uneven portion is formed on a shearing edge of the blade. 2. A blade for shearing steel, wherein the irregularities are formed on upper and lower end surfaces of the blade for shearing steel. 3. The steel material shearing blade according to claim 1, wherein said uneven portion is formed on the left and right side surfaces of the steel material shearing blade. 4. A steel material shearing blade characterized in that the irregularities are formed only near the shearing edge of the steel material shearing blade.