JPH0344426Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a shearing machine that shears plate-shaped materials such as non-ferrous metals and resins.

(b) Prior Art A plate-shaped material is sheared by a shearing machine. Generally, the cross-sectional shape of the shearing blade in a shearing machine is, for example,
On the 20th of May, the ``Press Handbook'' published by Maruzen Co., Ltd.
As shown on page 453, it is approximately rectangular;
The angle of the blade is almost a right angle.

(c) Problems to be solved by the invention When soft materials and plastic materials such as aluminum, synthetic rubber, soft resins, phenolic resins, epoxy resins, etc., and laminates of these materials are sheared using a conventional shearing machine, Since the cutting edge of the shearing blade is approximately at right angles, there is a problem in that it is difficult to obtain a highly accurate shearing surface.

In order to solve the above-mentioned conventional problems, shearing blades have been developed in which the shearing blades are provided with an elevation angle to form sharp blades, but these are not fully satisfactory. That is, it is difficult to make the shearing blade extremely thin because it needs to have rigidity as a shearing blade, and the head of the mounting bolt must be embedded when it is attached to a shearing machine. Therefore, the plate holder provided in the shearing machine for press-fixing the material must be separated from the blade portion of the shearing blade by at least the thickness of the shearing blade. for,
It has been difficult to shear soft and plastic materials with high precision.

The present invention was devised for the purpose of solving the above problems, and aims to provide a shearing machine that can shear materials such as soft materials and plastic materials with high precision.

(d) Means for solving the problem The present invention is based on an upper blade attached to a vertically movable ram in a shearing machine, and a lower blade attached to the table of the shearing machine to work with the upper blade to shear the material. A blade (shearing blade) is attached, and on the upper surface where the lower blade comes into contact with the material when shearing the material, a recess is formed that reaches the blade part, leaving a flat part in the part facing the plate holder of the shearing machine, and vertically. The blade portion is formed to be sharp by forming a relief surface that is inclined with respect to the surface, and the connection portion between the flat portion and the recessed portion is formed to be a curved surface.

(e) Effect The upper surface of the shearing blade, which contacts the material, leaves a flat part in the part facing the plate holder and forms a recessed part leading to the blade, so that the blade of the shearing blade becomes sharp. Therefore, it becomes possible to press and fix the material to the flat part of the upper surface of the shearing blade with the plate holder, and it is possible to press and fix the material very close to the blade part. Further, since the contact portion between the flat portion and the recessed portion is a curved surface, no impression is generated. Furthermore, since the blade is sharp, the cutting ability of the blade into materials such as soft materials and plastic materials is improved.
Shearing can be performed with high precision without causing large deformation to the sheared part of the material.

(f) Example Referring to FIG. 1, shearing machine 1
is composed of left and right side frames 3L, 3R, a table 5, an upper frame 7, etc., which are integrally supported by the side frames 3L, 3R. The upper frame 7 is provided with a plurality of plate holders 9 for pressing and fixing a plate-shaped material W such as a soft material or a plastic material placed on the table 5. Further, a ram 11 is supported on the upper frame 7 so as to be vertically movable. The ram 11 is moved up and down by a drive device such as a crankshaft or a hydraulic cylinder 13, and an upper blade 15 is attached to the lower part of the ram 11. On the other hand, a lower blade 17 is attached to the table 5 to shear the material W in cooperation with the upper blade 15.

Referring to FIG. 2, the lower blade 17 is attached to the table 5.
It is attached to the stepped portion 5S formed in the top with bolts or the like. A recess 17C extending to the blade portion 17E is formed on the upper surface where the material W and the lower blade 17 come into contact during shearing, and a flat portion 17P that is substantially the same as the upper surface of the table 5 is provided in the remaining portion where the recess 17C is formed. There is. This plane part 17P is formed in a part facing the plate holder 9, and is
During shearing, the material W is pressed against the plane portion 17P by the plate holder 9. This plane part 17
The connecting portion between P and the recessed portion 17C is formed into a curved surface as is clear from the drawing. In addition, the lower blade 17
By forming a relatively large angle of elevation θ, the flank 17R is inclined relatively greatly with respect to the vertical plane, and the blade portion 17E is formed sharply.

Although the explanation is omitted, the upper blade 15
The cross-sectional shape is approximately symmetrical to the cross-sectional shape of the lower blade 17.

Therefore, when the ram 11 is lowered to shear the material W placed on the table 5, the material W can be pressed and fixed to the flat part 17P of the lower blade 17 by the plate holder 9, The material W can be pressed and fixed as close to the blade portion 17E as possible. At this time, since the connecting portion between the flat portion 17P and the recessed portion 17C is not angular and is formed into a curved surface, no indentation will be formed on the lower surface even if the material W is a soft material. In addition, since the blade portions of the upper blade 15 and the lower blade 17 are both sharp, the ability to cut into the material W is improved, and the material is sheared with high precision without causing large deformation or the like to the sheared portion of the material. .

(g) Effect of the invention As can be understood from the explanation of the embodiments above, the gist of the invention is as stated in the claims for utility model registration. In the lower blade 17 of the shearing machine, a flank surface 17R that is inclined with respect to the vertical plane is formed, and a flat portion 17P is formed in the portion where the upper surface that contacts the material W faces the plate holder 9.
The blade part 17E is formed sharply by forming a recessed part 17C that reaches the blade part 17E while leaving a . Then, the flat portion 17P and the recessed portion 17
The connection part with C is formed into a curved surface.

Therefore, when performing shearing processing with the shearing machine 1 according to the present invention, the plate presser 9 in the shearing machine 1 also holds the material W against the lower blade 17.
The blade part 17 can be pressed and fixed to the flat part 17P on the top surface of the blade part 17.
It can be pressed and fixed very close to E.
At this time, since the connecting portion between the flat portion 17P and the recessed portion 17C is formed into a curved surface, no indentation will occur on the lower surface of the material W even if the material W is a soft material. Further, since the blade portion 17E is sharp, the ability to cut into the material W is improved, and accurate shearing can be performed.

Note that the present invention is not limited to the above-mentioned embodiments, but can be implemented in other embodiments by making appropriate changes.

[Brief explanation of the drawing]

FIG. 1 is a front view of the shearing machine, and FIG. 2 is an enlarged sectional view taken along the line - in FIG. 15... Upper blade, 17... Lower blade, 17C... Concave portion, 17P... Plane portion, 17E... Blade portion.

Claims (1)

[Scope of utility model registration request] In the shearing machine, an upper blade 15 is attached to the vertically movable ram 11, and a lower blade (shearing blade) 17 is attached to the table 5 in the shearing machine to cooperate with the upper blade 15 to shear the material W. On the upper surface where the lower blade 17 contacts the material W when shearing the material W, a recessed portion 17C extending to the blade portion 17E is formed leaving a flat portion 17P in a portion facing the plate presser 9 of the shearing machine, and a vertical surface. A non-ferrous metal/resin shearing device characterized in that a flank surface 17R is formed that is inclined relative to the blade portion 17E, and a connecting portion between the flat portion 17P and the recessed portion 17C is formed as a curved surface. shearing machine.