JPS5844887Y2 - punching device - Google Patents

Description

[Detailed explanation of the invention] This invention uses the engagement of the die and punch to
The present invention relates to a punching device suitable for shearing products and their scraps from sheet metal materials.

Figures 1 through C are explanatory views showing the operating state of a conventional punching device, and Figures 2 through C are explanatory views showing the working state of a sheet metal material obtained by the same punching device.

In this conventional punching device, the product cutting edge 2 of the punch 1 and the product cutting edge 4 of the die 3 engage to shear the product punching portion 9A of the sheet metal material 9, and the product cutting edge 4 of the die 3 is perpendicular to the product cutting edge 4 of the die 3. The scrap cutting edge 6 provided at the discontinuous portion 5 and the scrap cutting edge 8 of the scrap cutter 7 cut the scrap punched portion 9B of the sheet metal material 9.
is sheared.

That is, in such a conventional punching device, first, as shown in FIG.
After being positioned on the upper surface, the die 3 is lowered relative to the punch 1 as shown in FIG. The product punched portion 9A of the material 9 is sheared.

After shearing the product punched portion 9A, when the die 3 is further lowered relative to the punch 1 and the scraper counter 7, the sheet metal material 9 has a discontinuous portion of the product punched portion 9A, as shown in FIG. 2B. By pushing the die 3 into the discontinuous portion 5, a strain generation portion 9C is generated, and a portion of the scrap punched portion 9B is torn off to generate a fracture portion 9D and chips are generated.

When the die 3 further descends from this state with respect to the punch 1 and the scrap canter 7, the discontinuous portion 5 of the die 3
Product cutting edge 4A and scrap cutting edge 6 provided in
As a result of the engagement between the scrap cutting blade 8 provided on the scrap cutter 7 and the product cutting blade 2 of the punch 1, a strain generation portion 9C and a fracture portion 9D are formed as shown in FIG. 2C.
are respectively sheared to obtain products and scraps.

However, in the above-mentioned conventional punching device, the die 3 must have a discontinuous portion 5 in order to engage the scrap cutting edge 8 of the scrap counter 7 with the scrap cutting edge 6 of the die 3. Due to the existence of the product punching part 9A and the scrap punching part 9B of the sheet metal material 9
A strain generation part 9C and a fracture part 9D are produced at the boundary with
Problems arise when it is impossible to avoid distortion of the product and surface contamination due to the adhesion of chips and chips.

This invention was created in view of the above-mentioned conventional problems, and can prevent distortion, breakage, and generation of chips during shear processing of sheet metal material where the product punching part and the scrap punching part border. The purpose of the present invention is to provide a punching device.

In order to achieve the above object, the punching device according to the present invention includes a punch provided with a continuous product cutting blade, which is disposed facing the punch so as to be movable relative to the punch, and has a punch in a portion excluding a discontinuous portion.
a die having a product cutting edge that can engage with a product cutting edge of the punch and having a scrap cutting edge at a discontinuous portion;
The auxiliary die has an auxiliary product cutting blade that is built into the discontinuous part of the die and is continuously arranged on the product cutting edge of the die during product shearing, and retracts into the discontinuous part of the die during scrap shearing, and is movable relative to the die. A scrap cutter is provided with a scrap cutting edge that is arranged oppositely and can engage with the scrap cutting edge of the die, and the product cutting edge of the punch engages with the product cutting edge of the die and the auxiliary product cutting edge of the auxiliary die. The scrap cutting blade of the die and the scrap cutting blade of the scrap cutter engage with each other to shear the product.

Hereinafter, embodiments of this invention will be described with reference to the drawings.

FIGS. 3 and 4 are explanatory diagrams showing one embodiment of the punching device according to this invention.

The punch 10 is fixedly arranged with a continuous product cutting edge 11.

A scrapper counter 12 is fixedly disposed on the side of the punch 10 in such a manner that its scrap cutting edge 13 is disposed orthogonally to the product cutting edge 11 of the punch 10.

A die 14 is disposed above the punch 10 and the scrap counter 12 so as to be movable downward relative to the punch 10 and the scrap counter 12.

A product cutting edge 16 that can engage with the product cutting edge 11 of the punch 10 is provided on one side of the die 14, excluding the discontinuous portion 15 having a width of 15A.

Further, the discontinuous portion 15 of the die 14 is provided with a scrap cutting blade 17 that is disposed perpendicular to the product cutting blade 16 and can engage with the scrap cutting blade 13 of the scrap cutter 12.

Further, an auxiliary die 18 is supported on the back side by a support 19 such as urethane rubber, a coil spring, a disc spring, or a hydraulic cylinder in a notch portion of the die 14 that communicates with the discontinuous portion 15. An auxiliary product cutting blade 20 is provided which has a supporting force and is continuously disposed on the product cutting blade 16 of the die 14, and which can compress the support 19 and retreat into the discontinuous portion 15 of the die 14 during scrap shearing. .

Next, the operation of the above embodiment will be explained.

5A to 5C are explanatory diagrams showing the operating state in the above embodiment, and FIGS. 6A to 6C are explanatory diagrams showing the processing state of the sheet metal material 21 in the above embodiment.

First, as shown in FIG. 5A, on the upper surface of the punch 10, a sheet metal material 21 shown in FIG. 22, the scrap cutting blade 13 of the scrap counter 12, the scrap cutting blade 17 of the die 14, and the sheet metal material 21
The scrap punched portion 23 is positioned and held in alignment with the scrap punched portion 23.

From this state, the die 14 is moved downward and the fifth
As shown in Figure C, the product cutting edge 11 of the punch 10,
By engaging the product cutting blade 16 of the die 14 and the auxiliary product cutting blade 20 of the auxiliary die 18, the product punched portion 22 of the sheet metal material 21 is sheared to obtain a product 21A, as shown in FIG. 6B. .

At the end of shearing of the product punching section 22, the sheared scrap 21B is held between the scrap cutter 12 and the auxiliary die 18.

Furthermore, when the die 14 moves downward from this state, the scrum counter 12 moves to the support body 1 through the auxiliary die 18.
9 is compressed, and the auxiliary die 18 is inserted into the discontinuous part 1 of the die 14.
Push it inside 5.

The scrap 21B that has been sheared from the product punching part 22 by this pushing operation of the scrapper counter 12 forms a deformed part 24 in the vicinity of the position corresponding to the scrap punching part 23, and then the scrap cutting blade 13 of the scrap cutter 12 and the die 14 is sheared at the scrap punching portion 23 by engagement with the scrap cutting blade 17 .

According to the above embodiment, the product punched portion 22 of the sheet metal material 21
The product cutting blade 16 of the die 14 engages and operates at the same timing with the product cutting blade 11 of the punch 10.
After shearing is completed by the auxiliary product cutting edge 20 of the auxiliary die 18 and the auxiliary product cutting edge 20 of the auxiliary die 18, the scrap punched portion 23 can be sheared by the scrap cutting edge 13 of the scrap counter 12 and the scrap cutting edge 17 of the die 14.

Therefore, when shearing the product punched portion 22 from the sheet metal material 21, the product punched portion 22 of the sheet metal material 21 corresponding to the discontinuous portion 15 of the die 14 is not distorted or broken.

Further, the scrap punched portion 23 of the sheet metal material 21 is also sheared by the scrap cutting blade 13 of the scrap counter 12 and the scrap cutting blade 17 of the die 14 without being broken, so no chips are generated. .

That is, according to the above embodiment, the obtained punched product 2
1A does not generate distortion or chips due to breakage.

In addition, in the above embodiment, the case where the product punched portion 22 of the sheet metal material example 21 is linear, but in this invention, as shown in FIG. 7, the product punched portion 32 of the sheet metal material 31 is straight. It is also applicable to curved cases.

In this case, a disk-shaped product 31A is obtained, and the scrap 3 that is sheared by the scrap punching part 33 is
1B is obtained.

As described above, the punching device according to the invention includes a punch having a continuous product cutting edge, which is disposed facing the punch so as to be movable relative to the punch, and has a punch that engages with the product cutting edge of the punch at a portion excluding a discontinuous portion. A die that is equipped with a product cutting edge that can be used and a scrap cutting edge in the discontinuous part, and a die that is built in the discontinuous part of the die and is continuously arranged on the product cutting edge of the die during product shearing, and has a discontinuous discontinuous part of the die during scrap shearing. an auxiliary die equipped with an auxiliary product cutting blade that is retracted into the part;
a scrap cutting blade arranged to face the die so as to be movable relative to the die and capable of engaging with a scrap cutting blade of the die, the product cutting blade of the punch;
The product is sheared by the engagement between the product cutting edge of the die and the auxiliary product cutting edge of the auxiliary die, and the product is sheared into scrap by the engagement of the scrap cutting edge of the die and the scrap cutting edge of the scrap cutter. This has the effect that products and scraps can be separated from the material under good shear conditions.

[Brief explanation of the drawing]

Figures 1 to C are explanatory diagrams showing the operating state of a punching device according to the conventional example, Figure 2 to C are explanatory diagrams showing the processing state of sheet metal material by the conventional example, and Figure 3 is an explanatory diagram showing the operating state of a punching device according to the conventional example. A front view showing one embodiment of the punching device, FIG.
A sectional view taken along the line IV-IV in the figure, Figures 5 to 5 are explanatory diagrams showing the operating state of the same embodiment, Figures 6 to 6 are explanatory diagrams showing the processing state of the sheet metal material in the same embodiment, FIG. 7 is an explanatory view showing a sheet metal material to which a punching device according to another embodiment of the invention is applied. 10...Punch, 11...Product cutting blade,
12... Scrump cutter, 13...
Scrap cutting blade, 14...Dice, 15...
...Discontinuous part, 16...Product cutting edge, 17...
... Scrap cutting blade, 18 ... Auxiliary die, 19 ... Support body, 20 ... Auxiliary product cutting blade, 21 ... Sheet metal material, 22...Product punching section, 23...Scrap punching section.

Claims (1)

[Scope of utility model registration request] A punch with a continuous product cutting edge, a product cutting edge that is disposed so as to be movable relative to the punch and can engage with the product cutting edge of the punch in a portion excluding the discontinuous portion, and a product cutting edge that is capable of engaging with the product cutting edge of the punch in a portion excluding the discontinuous portion. A die with a cutting blade; an auxiliary die with an auxiliary product cutting blade that is built into the discontinuous part of the die and is disposed continuously on the product cutting edge of the die during product shearing, and is retracted into the discontinuous part of the die during scrap shearing; a scrap counter, which is arranged so as to be movable relative to the die and has a scrap cutting blade that can engage with the scrap cutting edge of the die; A punching device characterized by shearing a product through engagement with a cutting blade, and shearing scrap through engagement between a scrap cutting edge of a die and a scrap cutting blade of a scrap cutter.