JPH0340510Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a shearing machine that mechanically shears sheet metal or the like in a straight line.

<Prior art> As shown in FIG. 5, a conventional shearing machine has two right-angled linear positioning surfaces 2 formed on a fixed lower mold 1.
A plurality of lower cutting blades 3 made of rectangular parallelepiped cutting blade blocks are fixed in series to the upper mold, and two linear positioning surfaces 5 of right angles are formed on the upper die which moves up and down. The cutting blade 6 is fixed. In order to reduce the shearing force, the cutting block of the upper cutting blade 6 has one of its four sides as an inclined surface 7 and forms a shear angle θ for each upper cutting blade 6, as shown in FIG. When fixed in series to the linear positioning surface 5 of the mold 4, the surface corresponding to the lower cutting edge 3 is serrated.

<Problems to be solved by the invention> In the above-mentioned shearing machine, the four corners of the lower cutting blade 3 can be used as cutting blades, so when the cutting edge becomes dull, the cutting blade block can be rotated to cut. It can be used four times by changing the direction of the corner that forms the blade, but since the upper cutting blade 6 has the shear angle θ of the inclined surface 7 formed on itself, two of the surfaces on which the inclined surface 7 is formed Only the two corners A and B cannot be used as cutting edges, making it uneconomical. In addition, in terms of shape, the lower cutting edge and the upper cutting edge are each specified and dedicated, and are processed separately.

<Means for solving the problems> The present invention provides a shearing machine that solves the above-mentioned conventional problems, and its characteristic configuration is as follows:
A lower cutting blade is provided with a plurality of rectangular parallelepiped cutting blade blocks fixed in series to a fixed lower mold, and an upper cutting blade is provided with a plurality of cutting blade blocks each fixed at a shear angle to an upper mold that moves up and down. In the shearing machine, the upper cutting blade is a rectangular parallelepiped cutting blade block similar to the lower cutting blade, and a saw blade-like positioning surface has a shear angle such that the upper surface and one end surface of the cutting blade block are in contact with the upper die;
A vertical positioning surface is provided on which one surface perpendicular to the upper surface of the cutting blade block comes into contact, and a plurality of the cutting blade blocks are fixed to this vertical positioning surface.

<Function> The present invention provides a shear angle for each cutting edge block by attaching a rectangular parallelepiped cutting edge block having the same shape as the cutting edge block of the lower die to the saw blade-like positioning surface of the upper die. is used as a cutting edge.

<Example> Hereinafter, an example of the present invention will be described based on FIGS. 1 to 4. In FIG. 1, 4 is an upper mold. The upper cutting blade 8 attached to this upper mold 4 is the fourth
As shown in the figure, the cutting blade block is a rectangular parallelepiped having the same shape as the lower cutting blade 3 attached to the conventional lower die.

The upper cutting edge 8 made of this rectangular parallelepiped block is the upper die 4.
It must be installed with a shear angle. To this end, in the present invention, the upper mold 4 is provided with a mounting surface having the following configuration.

That is, as shown in FIG. 1, a first contact surface 9 is in contact with the upper surface of the upper cutting blade 8 made of the rectangular parallelepiped cutting blade block, and a second contact surface is in contact with one end surface of the upper cutting blade 8. a sawtooth positioning surface 11 consisting of 10;
and a vertical positioning surface 14, which is in contact with one surface perpendicular to the upper surface of the upper cutting edge 8, are formed on the upper mold 4. The first abutting surface 9 has a shear angle θ ₁ , and the first abutting surface 9 and the second abutting surface 10
forms a right angle.

As an example of forming the sawtooth positioning surface 11 and the vertical positioning surface 14 using the first and second contact surfaces 9 and 10, as shown in FIG. First, a cutout recess 12 is cut in the inner part of the portion that will become the saw-tooth positioning surface 11, and then the saw-tooth positioning surface 11 is cut. Then, as shown in FIG.
Obtained by fixing.

Since the present invention has the structure as described above, the lower mold 1
By attaching the upper cutting blades 8 made of the same rectangular parallelepiped cutting blade block as the lower cutting blades 3 attached to the sawtooth positioning surface 11 and the vertical positioning surface 14 of the upper mold 4, the lower surface of each lower cutting blade 8 is As shown in FIG. 1, it is positioned and fixed with a shear type θ ₂ . Therefore, since the upper cutting blade 8 is also a rectangular parallelepiped cutting blade block, when the cutting edge loses its sharpness, it can be rotated and used by changing the direction of the cutting blade four times.

<Effects of the invention> As described above, according to the invention, the upper cutting blade mounting surface of the upper die is a saw blade-like positioning surface with a shear angle, so the upper cutting blade can be used in the same manner as the lower cutting blade. It can be made into a rectangular parallelepiped cutting edge block, and the upper cutting edge also uses four cutting edges, and since it is shared with the lower cutting edge, the cutting edge block only needs to have one type of shape.
It has the advantage of being easy to process and reducing costs.

[Brief explanation of the drawing]

Fig. 1 is a front view of the main parts of the present invention, Fig. 2 is a sectional view taken along the line of Fig. 1, Fig. 3 is a sectional view taken along the line of Fig. 1, Fig. 4 is a perspective view of the upper cutting blade, and Fig. 5. 6 is a perspective view of essential parts of a conventional shearing machine, and FIG. 6 is a perspective view of the same cutting blade. DESCRIPTION OF SYMBOLS 1...Lower die, 3...Lower cutting blade, 4...Upper die, 8...Upper cutting blade, 11...Sawtooth positioning surface, 14...Vertical positioning surface.

Claims (1)

[Scope of utility model registration request] It is equipped with a lower cutting blade in which a plurality of rectangular parallelepiped cutting blade blocks are fixed in series on a fixed lower mold, and an upper cutting blade in which a plurality of cutting blade blocks are fixed in series at a shear angle on an upper mold that moves up and down. In the shearing machine, the upper cutting blade is a rectangular parallelepiped cutting blade block similar to the lower cutting blade, and a saw blade-like positioning surface has a shear angle such that the upper surface and one end surface of the cutting blade block are in contact with the upper mold;
A shearing machine for sheet metal, etc., comprising a vertical positioning surface that is in contact with one surface that is perpendicular to the upper surface of the cutting blade block, and a plurality of the cutting blade blocks are fixed to the vertical positioning surface.