JP2004122158A - Die - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To extend the service life of an edge part and to prevent the development of flaw on a work by preventing the contact with the work except punching out time with the edge part in a die. <P>SOLUTION: In the die D applying a prescribed punching work to the work W, together with a punch P, the cutting edge part 1 is arranged at the lower position than the upper surface 21 of the die body 2. On the upper surface 21 of the die body 2, the peripheral edge 4 of a hole 3 arranging the cutting edge part is formed as a round part or a gentle inclining surface. Further, the cutting edge part 1 is unitively formed with the die body 2 or formed as a chip separated from the die body 2. Furthermore, in the case of forming the cutting edge part 1 unitively with the die body 2, a flat part 5 is arranged in the periphery of the edge part 18 of the cutting edge part 1. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a die, and more particularly to a die in which a cutting edge is prevented from coming into contact with a work other than during punching.
[0002]
[Prior art]
A conventional punch press, for example, a turret punch press has a configuration shown in FIG. 8, in which a punch die P is mounted on an upper turret 96, a die die D is mounted on a lower turret 97, and further above the punch die P. Is provided with a ram 92.
[0003]
With this configuration, when the work W is carried into the turret punch press, the work W is grasped and moved by the clamp 93, is positioned immediately below the ram 92, and when the punch D is pressed by the ram 92, The punch die P descends, and the work W is punched, for example, in cooperation with the die die D.
[0004]
In this case, a hole 91 for punching is formed in the main body 90 of the die D. As shown in the figure, the upper edge portion of the hole 91 becomes a cutting edge 94, and the work W is punched into a predetermined shape. The generated waste W1 is discharged to the outside.
[0005]
[Problems to be solved by the invention]
[0006]
However, in the conventional die D (FIG. 9), the cutting edge 94 of the cutting blade portion 95 is provided at the same height position as the upper surface 90 </ b> A of the die main body 90. It moves along a pass line PL which is a movement reference plane set on the upper surface 90A.
[0007]
That is, conventionally, the cutting edge 94 is provided at the same height position as the pass line PL.
[0008]
Therefore, when the work W moves, dust and burrs on the lower surface of the work W adhere to the cutting edge 94, and the lower surface of the work W rubs the cutting edge 94 and its periphery.
[0009]
As a result, the cutting edge 94 may be damaged and its life shortened, and the lower surface of the work W may be flawed.
[0010]
Accordingly, the frequency of replacing the die D is increased, and the lower surface of the work W is scratched, so that the product value of the processed work W is lost, and the work W must be processed again, and the processing efficiency is reduced. There are various adverse effects, such as doing so.
[0011]
SUMMARY OF THE INVENTION It is an object of the present invention to prolong the life of a cutting edge of a die and to prevent the work from being scratched by preventing the cutting edge from contacting the work other than during punching.
[0012]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides:
In a die die D for performing a predetermined punching process on a work W in cooperation with a punch die P,
The cutting blade portion 1 is provided at a position lower than the upper surface 21 of the die main body 2, and a technical means called a die die D is provided.
[0013]
According to the configuration of the present invention, even if the workpiece W moves along the pass line PL (for example, FIG. 2) set at the same height position as the upper surface 21, the cutting blade 1 is located at a position lower than the upper surface 21. Since the workpiece W is provided, the moving workpiece W does not come into contact with the cutting edge 18 of the cutting blade portion 1, and the damage of the cutting edge 18 is reduced. Will not stick.
[0014]
For this reason, in the die, by preventing the cutting edge from contacting the work other than at the time of punching, it is possible to extend the life of the cutting edge and prevent the work from being flawed.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a perspective view showing a first embodiment according to the present invention.
[0016]
As is well known, the illustrated die D is mounted on a lower turret 25 of a turret punch press (FIG. 7A) through keyways 8 and 9 and mounted on an upper turret 24, for example. This is a die that performs punching, for example, punching, on the work W in cooperation with the punch die P.
[0017]
The die D shown in FIG. 1 has a die body 2, and a punching hole 3 is formed in the center of the upper surface 21, and the cutting blade 1 is provided inside the hole 3.
[0018]
The cutting edge portion 1 is provided at a position lower than the upper surface 21 of the die body 2, and the depth position H of the cutting edge 18 of the cutting edge portion 1 with respect to the upper surface 21 (FIG. 2) is too small. The cutting edge 18 comes into contact with the workpiece W moving along the pass line PL.
[0019]
However, if the depth position H of the cutting edge 18 is too large, the workpiece W is punched out in cooperation with a cutting edge 23 of a punch die P (FIG. 7A) described later (FIG. 7C). ), The work W penetrates deeply into the hole 3 and cannot return to its original state beyond the elastic limit, and the periphery of the punched hole A (FIG. 7 (D)) hangs down, losing its value as a product.
[0020]
For this reason, the depth position H of the cutting edge 18 of the cutting blade portion 1 (FIG. 2) is a case where the work W is punched (FIG. 7C), and the work W has entered the hole 3. Sometimes, the workpiece W is within the elastic limit, and after punching (FIG. 7D), it is at an appropriate depth position to return to the original position.
[0021]
Further, a flat portion 5 is provided around the cutting edge 18 (FIG. 2) of the cutting blade portion 1, and the punch die 32 is pressed by pressing a punch head 32 with a ram 22 described later (FIG. 7A). When the cutting edge 23 on the side (FIG. 7 (C)) enters the cutting edge 18 on the die D side, the workpiece W is punched by the both cutting edges 23, 18.
[0022]
That is, if the flat portion 5 is not provided, the cutting edge portion 1 has no edge, the cutting edge 18 does not work effectively, and the work W is not punched cleanly. , And the cutting edge 23 on the punch die P side and the cutting edge 18 on the die die D side cooperate to punch the workpiece W neatly.
[0023]
Further, the upper surface 21 of the die main body 2 is located at a position corresponding to the peripheral edge of the cutting edge portion 1, in other words, the peripheral edge 4 of the hole 3 in which the cutting edge portion 1 is provided. ) Or a gently inclined surface (lower diagram in FIG. 2, for example, an inclined surface having an angle θ).
[0024]
As a result, even if the lower surface of the moving workpiece W interferes with the peripheral edge 4 as compared with the case where the peripheral edge 4 is sharp and at an angle of, for example, 90 °, the interference is alleviated, and the workpiece W is scratched. In addition, the die D can be prevented from being damaged.
[0025]
According to the configuration of the first embodiment of the present invention, even if the work W moves along the pass line PL (FIG. 2) set at the same height position as the upper surface 21 of the die main body 2, the cutting blade portion Since the workpiece 1 is provided at a position lower than the upper surface 21, the moving workpiece W does not come into contact with the cutting edge 18 of the cutting blade portion 1, and the damage of the cutting edge 18 is reduced, so that the life of the cutting edge 18 is extended. In addition, there is an effect that the work W is not scratched.
[0026]
FIG. 3 is a perspective view showing a second embodiment of the present invention. The difference from the first embodiment of FIG. 1 (FIG. 2) is that in FIG. 3 is that the cutting blade 1 is formed as a separate chip from the die body 2 in the case of FIG.
[0027]
In FIG. 3, a die D has a die body 2 and a cutting blade 1 formed separately therefrom. The cutting blade 1 is formed as a chip. When the tip 18 is worn out, replacing only the tip-type cutting blade 1 has the effect of reducing costs compared to replacing the entire die D.
[0028]
In the center of the upper surface 21 of the die body 2, for example, a circular hole 3 for punching is formed. Inside the hole 3, for example, a circular groove 6 is formed. The cutting blade 1 is inserted.
[0029]
The tip-type cutting blade 1 has, for example, a disk shape, and has an opening 19 at the center thereof, and a peripheral edge of the opening 19 is a cutting edge 18.
[0030]
With this configuration, the tip-type cutting blade 1 is inserted into the groove 6 on the die body 2 side, and the bolt 7 is screwed in from the lower surface side of the die body 2. Attached to.
[0031]
In this case, the tip-type cutting blade 1 is provided at a position lower than the upper surface 21 of the die body 2, and the depth position H of the cutting edge 18 of the cutting blade 1 with respect to the upper surface 21 (FIG. 4) is similarly determined. When the work W is punched out (corresponding to FIG. 7C), when the work W enters the hole 3, the work W is within the elastic limit, and after the punching (FIG. This corresponds to D)) and is an appropriate depth position enough to return to the original position.
[0032]
In addition, on the upper surface 21 of the die body 2, the peripheral edge 4 of the hole 3 in which the tip-type cutting blade 1 is provided is an R portion (upper view in FIG. 4) or a gentle slope (lower view in FIG. 4, For example, an inclined surface having an angle θ).
[0033]
Thereby, similarly, even if the lower surface of the moving workpiece W interferes with the peripheral edge 4 as compared with the case where the peripheral edge 4 is sharp and at 90 °, for example, the interference is alleviated. No flaws are formed, and damage to the die D is also prevented.
[0034]
According to the configuration of the second embodiment of the present invention, similarly, even if the work W moves along the pass line PL (FIG. 4) set at the same height position as the upper surface 21 of the die body 2, Since the tip-type cutting blade 1 is provided at a position lower than the upper surface 21, the moving workpiece W does not contact the blade 18 of the chip-type cutting blade 1, and the blade 18 is less damaged. Therefore, there is an effect that the life of the cutting edge 18 is prolonged and the work W is not flawed.
[0035]
FIG. 5 is a perspective view showing a third embodiment of the present invention, which is the same as FIG. 3 (FIG. 4) in that the cutting portion 1 is configured as a tip, but the tip type cutting edge is used. The difference is that the unit 1 is constituted by a plurality of chip pieces 1A, 1B, 1C and 1D.
[0036]
Thereby, similarly to the second embodiment of FIG. 3, in addition to the cost reduction, the tip-type cutting blade portion 1 is constituted by a plurality of, for example, four tip pieces 1A, 1B, 1C, and 1D. Therefore, as is well known, the load at the time of punching (corresponding to FIG. 7 (C)) is dispersed, and there is an effect different from that of FIG. 3 such as prevention of die cracking.
[0037]
In FIG. 5, the die body 2 is provided with, for example, a rectangular punching hole 3 in the center thereof, and a plurality of, for example, four grooves 2A, 2B, 2C, 2D inside the hole 3. Each of the chip pieces 1A, 1B, 1C, and 1D constituting the chip-type cutting blade 1 is inserted into each of the formed grooves 2A, 2B, 2C, and 2D.
[0038]
When viewed from above, each of the chip pieces 1A, 1B, 1C, and 1D has, for example, a trapezoidal shape in which the inside is formed of short sides and the outside is formed of long sides. .
[0039]
On both sides of each of the chip pieces 1A, 1B, 1C, and 1D (FIG. 5), inclined end faces 17 and 10, 11 and 12, 13 and 14, and 15 and 16 are provided.
[0040]
With this configuration, each of the chip pieces 1A, 1B, 1C, and 1D is inserted into the grooves 2A, 2B, 2C, and 2D, and is brought into contact with each inclined end surface. (A) and FIG. 6 (C)), the chip-type cutting blade 1 constituted by the chip pieces 1A, 1B, 1C and 1D is mounted on the die body 2.
[0041]
In this case, the tip-type cutting blade 1 is provided at a position lower than the upper surface 21 of the die body 2, and the depth position H of the cutting edge 18 of the cutting blade 1 with respect to the upper surface 21 is as shown in FIG. 6 (C)), when the work W is punched (corresponding to FIG. 7 (C)), even when the work W enters the hole 3, the work W is within the elastic limit and The rest is a depth position appropriate for returning to the original position (corresponding to FIG. 7D).
[0042]
Also, on the upper surface 21 of the die main body 2 (FIGS. 6B and 6C), the peripheral edge 4 of the hole 3 in which the chip-type cutting blade 1 is provided is an R portion (the upper diagram in FIG. 4). ) Or a gentle slope (corresponding to the lower diagram in FIG. 4).
[0043]
As a result, even if the lower surface of the moving workpiece W interferes with the peripheral edge 4 as compared with the case where the peripheral edge 4 is sharp and at an angle of, for example, 90 °, the interference is alleviated, and the workpiece W is scratched. In addition, the die D can be prevented from being damaged.
[0044]
According to the configuration of the third embodiment of the present invention, even if the work W moves along the pass line PL (FIG. 6) set at the same height position as the upper surface 21 of the die body 2, the chip type Since the cutting edge portion 1 is provided at a position lower than the upper surface 21, the moving workpiece W does not come into contact with the cutting edge 18 of the tip-type cutting edge portion 1, and the damage to the cutting edge 18 is reduced. There is an effect that the life of the cutting edge 18 is extended and the work W is not damaged.
[0045]
On the other hand, the punch die P for performing the punching process in cooperation with the die die D shown in FIGS. 1 to 6 is mounted on the upper turret 24 (FIG. 7A) as described above. .
[0046]
That is, the upper turret 24 supports a punch guide 30 via a lift spring 34, and the punch guide 30 supports a punch head 32 via a stripper spring 33.
[0047]
A punch driver 35 extending downward is attached to the punch head 32. The punch driver 35 enters the punch guide 30. The punch driver 35 has a punch body 31 attached thereto. Side blade edge 23.
[0048]
Hereinafter, the operation of the present invention having the above configuration will be described with reference to FIG.
[0049]
First, as is well known, by rotating the upper turret 24 and the lower turret 25 (FIG. 7A) synchronously, the desired dies P and D, that is, A die D of the present invention provided at a position lower than the upper surface 21 (for example, FIGS. 1 and 2), and a corresponding punch die P at the processing position K are selected, and the work W gripped by the clamp 13 is selected. Is moved along the pass line PL and positioned at the processing position K.
[0050]
Next, in this state, when the ram 22 (FIG. 7B) is operated to press the punch head 32, the punch head 32 is pushed down, the lift spring 34 is bent, and the entire punch die P is lowered. Then, the stripper plate 37 at the lower end of the punch guide 30 comes into contact with the work W and presses it.
[0051]
When the punch head 32 is further pushed down from the state shown in FIG. 7B, the stripper spring 33 is bent (FIG. 7C), and the punch body 31 descends along the punch guide 30, and the punch at the tip thereof The workpiece W is punched by the cutting edge 23 on the die P side and the cutting edge 18 on the die D side, and the waste W1 is discharged to the outside through the hole 3.
[0052]
Thereafter, the ram 22 is raised (FIG. 7 (D)) to return the punch die P to the initial position, and the workpiece W having the punched hole A formed and held by the clamp 13 is moved along the pass line PL.
[0053]
In this case, in the process shown in FIG. 7, even if the workpiece W is moved along the pass line PL (FIGS. 7A and 7D), as described above (for example, FIGS. 1 and 2). Since the cutting blade 1 is provided at a position lower than the upper surface 21 of the die body 2, the moving workpiece W does not come into contact with the blade 18 of the cutting blade 1, so that the blade 18 is damaged. , The life of the cutting edge 18 is prolonged, and the work W is not scratched.
[0054]
Further, since the peripheral edge 4 of the hole 3 in which the cutting blade 1 is provided on the upper surface 21 of the die body 2 is an R portion, the moving workpiece W (FIGS. 7A and 7 D)) Even if the lower surface interferes with the peripheral edge 4, the interference is relieved, the work W is not scratched, and the die D is prevented from being damaged.
[0055]
Further, as described above, the depth position H of the cutting edge 18 of the cutting blade portion 1 (for example, FIG. 2) corresponds to the case where the work W is punched (FIG. 7C), and the work W 3, the workpiece W is within the elastic limit, and after the punching (FIG. 7D), the workpiece W is set at an appropriate depth position to return to the original position. There is no hanging around.
[0056]
【The invention's effect】
According to the present invention, in the die die for performing a predetermined punching process on the work in cooperation with the punch die, the cutting blade portion is provided at a position lower than the upper surface of the die body. Therefore, even if the work moves along the pass line set at the same height position as the upper surface, since the cutting edge portion is provided at a position lower than the upper surface, the moving work is in contact with the cutting edge of the cutting edge portion. There is an effect that the blade does not come into contact with the blade and damage to the blade is reduced, so that the life of the blade is prolonged and the work is not scratched.
[0057]
[Brief description of the drawings]
FIG. 1 is a perspective view showing a first embodiment of the present invention.
FIG. 2 is a side view of FIG.
FIG. 3 is a perspective view showing a second embodiment of the present invention.
FIG. 4 is a side view of FIG. 3;
FIG. 5 is a perspective view showing a third embodiment of the present invention.
6 is a plan view and a side view of FIG.
FIG. 7 is a diagram illustrating the operation of the present invention.
FIG. 8 is an explanatory diagram of a configuration of a conventional technique.
FIG. 9 is an explanatory diagram of a problem in the related art.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cutting blade part 2 Die main body 3 Hole 4 Peripheral edge 5 Flat part 6 Groove 7 Bolt 8, 9 Key groove 18 Cutting edge 1 of cutting blade part 19 Opening of chip constituting cutting blade part 21 Upper surface 22 of die body 2 Ram 23 Blade edge 24 of punch die P Upper turret 25 Lower turret 30 Punch guide 31 Punch body 32 Punch head 33 Stripper spring 34 Lift spring 35 Punch driver 37 Stripper plate 51 Pole plunger 1A, 1B, 1C, 1D Constructs cutting edge unit 1. Chips 2A, 2B, 2C, 2D of chips to be inserted Grooves 10, 11, 12, 13, 14, 15, 16, 17 into which chip chips are inserted Inclined end face D of each chip 1A, 1B, 1C, 1D Die metal Mold P Punch mold W1 Scrap

Claims (4)

In die dies that perform predetermined punching on workpieces in cooperation with punch dies,
A die mold, wherein the cutting blade portion is provided at a position lower than the upper surface of the die body. The die according to claim 1, wherein the periphery of the hole provided with the cutting edge portion is an R portion or a gentle slope on the upper surface of the die body. The die according to claim 1 or 2, wherein the cutting edge is formed integrally with the die body or is formed as a chip separately from the die body. 4. The die according to claim 3, wherein when the cutting edge is formed integrally with the die body, a flat portion is provided around a cutting edge of the cutting edge.

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