JP2004148356A - Die - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a die for shortening the working time of a scrap floating preventive means and completely preventing any scrap floating. <P>SOLUTION: The die has a punching hole 3 to punch a work W in cooperation with a punching die P, and a wedge-shaped groove 5 is formed in an upper portion of the punching hole 3. The upper portion of the punching hole 3 is formed of a vertical surface 4. The wedge-shaped groove 5 is gradually narrowed from an upper side to a lower side. In addition, the depth of the wedge-shaped groove is largest at the upper side, and gradually reduced downward. <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 having a means for preventing dregs rising.
[0002]
[Prior art]
A conventional punch press, for example, a turret punch press has a configuration shown in FIG. 5, 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 punch die P is pressed by the ram 90, the punch die P descends, and in cooperation with the die die D, for example, the work W gripped by the clamp 93 is punched, The scum W1 after the punching is discharged to the outside.
[0004]
However, when the punch die P rises and returns to the original position after the end of the punching process, the inside of the punching hole 91 formed in the die main body 90 becomes negative pressure, so that the waste W1 rises, If the scrap W1 adheres to the tip of the punch die P or adheres to the work W, and the punch die P is lowered again to perform the punching process in this state, the work W may be damaged. .
[0005]
[Problems to be solved by the invention]
[0006]
Therefore, conventionally, a means for preventing such a lift is provided in the turret punch press and the like, and examples of the means for preventing the lift include, for example, Japanese Unexamined Patent Publication No. 60-187737 and Japanese Utility Model Laid-Open No. 5-13614. Some have been disclosed.
[0007]
Among them, the scum rising prevention means disclosed in Japanese Patent Application Laid-Open No. 60-187737 is constituted by a projection provided inside a punched hole, and the scum is inserted into the projection to reduce the scum. This is to prevent the rise.
[0008]
However, this projection may be formed by welding on the inside of the punched hole (for example, from the fifth line to the twelfth line of column 20, which constitutes page 214 of JP-A-60-187439). Since the inside of the hole is formed integrally by electric discharge machining, the machining time is prolonged.
[0009]
In addition, the projections must be provided at a certain depth from the top surface of the die body (line 12 to line 17 of column 10, which constitutes page 211 of the publication), and the processing method is different. Extremely complex and cumbersome, and this also increases the processing time.
[0010]
Further, the projection is formed straight from the upper side to the lower side, and therefore, the degree of penetration of the waste into the projection is small, and there is a case where the upward movement of the waste cannot be completely prevented.
[0011]
On the other hand, the scrap lifting prevention means disclosed in Japanese Utility Model Laid-Open No. 5-13614 is constituted by a groove provided inside a punched hole. It is assumed that.
[0012]
However, this groove is provided from the upper portion to the lower portion of the punched hole (for example, FIGS. 1 and 3 of the publication), and therefore, it takes time to process.
[0013]
Further, the groove is formed straight from the upper side to the lower side, and therefore, the degree of penetration of the waste into the groove is small, and there is a case where the upward movement of the waste cannot be completely prevented.
[0014]
SUMMARY OF THE INVENTION An object of the present invention is to reduce the processing time of the scrap lifting prevention means in a die and to completely prevent the scrap lifting.
[0015]
[Means for Solving the Problems]
In order to solve the above problems, the present invention, as shown in FIGS.
A die means D is provided, which has a punching hole 3 for punching a workpiece W in cooperation with a punching die P, and a wedge-shaped groove 5 is provided on the punching hole 3. ing.
[0016]
According to the configuration of the present invention, for example, if the wedge-shaped groove 5 is provided on the vertical surface 4 which is the upper part (for example, FIG. 1) of the rectangular punched hole 3, the wedge-shaped groove 5 Since it is provided only on the upper part, the processing time is shortened as compared with the related art, and the wedge-shaped groove 5 is configured such that it is gradually narrowed from the upper side to the lower side. (FIG. 3), since the waste W1 is sufficiently inserted, the lift of the waste is completely prevented.
[0017]
For this reason, in the die, it is possible to shorten the processing time of the scrap lifting prevention means and completely prevent the scrap lifting.
[0018]
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 an embodiment according to the present invention.
[0019]
As is well known, the illustrated die D is mounted on a lower turret 25 of a turret punch press (FIG. 4A) 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.
[0020]
The die D of FIG. 1 has a die main body 2, and for example, a rectangular punched hole 3 is formed in the center of the upper surface 21, and the upper portion of the punched hole 3 has a predetermined depth H ( The lower surface of FIG. 1 is constituted by a vertical surface 4 on which a wedge-shaped groove 5 is provided.
[0021]
In this case, the wedge-shaped groove 5 (lower view in FIG. 1) is gradually narrowed from the upper side to the lower side, and the upper side has a predetermined width L (Y-axis direction) and a depth M (X-axis direction). The lower part has a predetermined width N (Y-axis direction), and the depth is, for example, zero.
[0022]
That is, assuming vertical lines E1 and E2 passing through the lower ends a and b of the wedge-shaped groove 5, the cross section of the wedge-shaped groove 5 perpendicular to the vertical lines E1 and E2 is, as is clear from the figure, upward. Is a rectangular cross section having a size of L × M, and a cross section similar in shape to this rectangular cross section gradually decreases downward, and a lower cross section has a size of 0 (N × 0). I have.
[0023]
In other words, the cross-sectional area of the wedge-shaped groove 5 is largest at the upper part, then gradually decreases downward, and is zero at the lower part.
[0024]
With this configuration, as will be described later (FIG. 3), for example, by the first punching process, the scrap W1 stuck in the lower end including the portion below the cross-sectional area 0 of the wedge-shaped groove 5 raises the punch die P after the process. (FIG. 4 (D)) Even if the inside of the punched hole 3 becomes negative pressure, it does not rise and the scum rise is completely prevented, but the same scum W1 generated by the next punching process (FIG. ), It is extruded very easily and is carried out through wider 3B, 3C.
[0025]
That is, the scum W1 trapped in the lower end including the lower part of the cross-sectional area 0 of the wedge-shaped groove 5 (FIG. 3) is caused by an upward air pressure based on the negative pressure in the punched hole 3 (FIG. 4D). And remains in the wedge-shaped groove 5 to completely prevent the dregs from rising, but is weak against the downward pressing force from the same dregs W1 via the descending punch die P (FIG. 3). , Are easily removed from the wedge-shaped groove 5 and are easily discharged.
[0026]
The wedge-shaped groove 5 has a bottom surface 5A and side surfaces 5B and 5C orthogonal to the bottom surface 5A on both sides of the bottom surface 5A.
[0027]
In this case, with respect to the vertical lines E1 and E2, the side surfaces 5B and 5C are inclined outward by a predetermined angle θ in the left-right direction (Y-axis direction), and the bottom surface 5A (FIG. 2) is shifted by a predetermined angle θ. It is inclined outward in the front-rear direction (X-axis direction).
[0028]
The predetermined widths L, N, depth M, and angle θ of the wedge-shaped groove 5 are such that when the workpiece W is punched (FIG. 4C), the waste W1 generated in the wedge-shaped groove 5 The value is set so as to completely prevent scum rising by fully digging and not to lower the product value of the workpiece W after punching.
[0029]
That is, the boundary between the upper surface 21 of the die D and the vertical surface 4 that forms the upper part of the punched hole 3 is the cutting edge portion 1, and the cutting edge portion 1 has the above-described wedge-shaped groove. 5 above is also included.
[0030]
Therefore, at the time of punching (FIG. 4C), the workpiece W is punched by the cutting blade 1 of the die D including the upper part of the wedge-shaped groove 5 and the cutting blade 23 of the punch P. In the work W, a hole A is formed (lower view in FIG. 4C), and scum W1 is generated.
[0031]
In this case, if the predetermined widths L and N, the depth M and the angle θ of the wedge-shaped groove 5 are relatively large values, the generated waste W1 is well inserted into the wedge-shaped groove 5, but is too large. When the value becomes a value, the wedge-shaped groove 5 constituting a part of the cutting edge portion 1 forms a conspicuous unevenness on the inner periphery of the hole A of the work W to the extent that the work W is visible. Value is lost.
[0032]
Therefore, as described above, the widths L and N, the depth M, and the angle θ of the wedge-shaped groove 5 are set so as to satisfy both the conditions of completely preventing the dregs from rising and preventing the product value of the work W from being reduced. Is set to a predetermined value.
[0033]
With this configuration, immediately after the punch die P is lowered (FIG. 3) and the workpiece W is punched by the cutting edge portion 23 and the cutting edge portion 1 of the die die D, the waste W1 is formed in the wedge-shaped groove 5. The upper part is harder.
[0034]
However, when the punch die P further descends, the waste W1 pressed by the punch die P descends while being pressed by the wedge-shaped groove 5 gradually narrowing downward, and the punch die P is moved downward. As shown in the drawing, when the bottom dead center is reached, the waste W1 is trapped in the narrowest lower end of the wedge-shaped groove 5.
[0035]
Therefore, even if the inside of the punched hole 3 becomes a negative pressure due to the rise of the punch die P after the punching, the waste W1 is trapped in the narrowest lower end of the wedge-shaped groove 5 as described above. As a result, it does not rise, and scum rising is completely prevented.
[0036]
The hole A of the work W formed after the waste W1 has been punched (lower view in FIG. 4C) has a predetermined width L set to satisfy the two conditions described above. The wedge-shaped groove 5 constituting a part of the cutting blade portion 1 does not form irregularities that are visible to the naked eye, and therefore, the value as a product is maintained.
[0037]
Further, the upper portion, which is the vertical surface 4 of the punched hole 3 in which the wedge-shaped groove 5 is provided (FIG. 2), forms the smallest opening 3A among the punched holes 3, and a middle portion continuous with the upper portion. Has an opening 3B of an intermediate size, which is inclined outward by an angle α, as shown in the figure, and a lower portion connected to the middle forms a largest opening 3C.
[0038]
Therefore, by the first punching process (FIG. 3), the narrowest lower end of the wedge-shaped groove 5 is pushed into the similar waste W1 generated by the next punching process, and the wedge-shaped groove 5 is pushed out. , And naturally fall through the openings 3B and 3C without being caught in the openings 3B and 3C larger than the opening 3A including the wedge-shaped groove 5, and are discharged to the outside.
[0039]
As described above, according to the present invention, since the wedge-shaped groove 5 is provided only on the vertical surface 4 which is the upper part of the punched hole 3, the processing time is shortened as compared with the related art, and the wedge-shaped groove 5 is moved from above to below. , The waste W1 is sufficiently inserted and the lift of the waste is completely prevented.
[0040]
On the other hand, the punch die P that performs the punching process in cooperation with the die die D is mounted on the upper turret 24 (FIG. 4A) as described above.
[0041]
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.
[0042]
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. The above-mentioned cutting edge portion 23 on the punch die P side is used.
[0043]
Hereinafter, the operation of the present invention having the above configuration will be described with reference to FIG.
[0044]
First, as is well known, the upper turret 24 and the lower turret 25 (FIG. 4A) are rotated synchronously to obtain desired dies P and D, that is, a book provided with a wedge-shaped groove 5. The die D according to the present invention (FIGS. 1 to 3) and the corresponding punch die P are selected at the processing position K, and the workpiece W gripped by the clamp 13 is positioned at the processing position K.
[0045]
Next, in this state, when the ram 22 (FIG. 4B) 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.
[0046]
When the punch head 32 is further depressed from the state shown in FIG. 4B, the stripper spring 33 is bent (FIG. 4C), and the punch body 31 descends along the punch guide 30, and the punch at the tip end thereof The workpiece W is punched out by the cutting edge portion 23 on the die P side and the cutting edge portion 1 on the die D side to form a hole A, and scum W1 is generated.
[0047]
Thereafter, the ram 22 is raised (FIG. 4 (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 to a predetermined position.
[0048]
In the above case, immediately after the workpiece W is punched (FIG. 4C), the waste W1 is hardly inserted above the wedge-shaped groove 5, but the punch die P is moved toward the bottom dead center (FIG. 3). As it descends, the waste W1 descends while being pressed by the wedge-shaped groove 5 gradually narrowing downward, and when the punch die P reaches the bottom dead center, the waste W1 is removed from the wedge-shaped groove 5. The narrowest lower end is hard to get into.
[0049]
Therefore, after the punching is completed (FIG. 4 (D)), even if the inside of the punching hole 3 becomes a negative pressure due to the rise of the punch die P, the waste W1 is not inserted into the narrowest lower end of the wedge-shaped groove 5. Since it is rare, it does not rise, and the dregs rise is completely prevented.
[0050]
Further, in the hole A of the work W formed after the waste W1 is punched (lower view in FIG. 4C), the wedge-shaped groove 5 constituting a part of the cutting blade portion 1 as described above. Does not form irregularities that are visible to the naked eye, and therefore retains its value as a product.
[0051]
Further, since the wedge-shaped groove 5 is provided only above the punched hole 3, the processing time of the wedge-shaped groove 5 is reduced.
[0052]
【The invention's effect】
As described above, the die mold of the present invention has a punched hole for punching a work in cooperation with a punched die, and a wedge-shaped groove is provided at an upper portion of the punched hole, so that the die die is formed. In the mold, the effect of shortening the processing time of the dreg rise preventing means and completely preventing the dreg rise is achieved.
[0053]
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of the present invention.
FIG. 2 is a side view of FIG.
FIG. 3 is a view showing a relationship between a wedge-shaped groove 5 and a waste W1 constituting the present invention.
FIG. 4 is a diagram illustrating the operation of the present invention.
FIG. 5 is an explanatory diagram of a configuration of a conventional technique.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cutting edge part of die D 2 Die body 3 Punching hole 4 Vertical surface 5 Wedge-shaped groove 8, 9 Key groove 21 Upper surface 22 of die body 2 Ram 23 Cutting blade part of punching die P 24 Upper turret 25 Lower turret Reference Signs List 30 Punch guide 31 Punch body 32 Punch head 33 Stripper spring 34 Lift spring 35 Punch driver 37 Stripper plate D Die mold P Punch mold W Work W1 Cas

Claims (4)

A die mold having a punched hole for punching a work in cooperation with a punched die, and a wedge-shaped groove provided in an upper portion of the punched hole. The die according to claim 1, wherein an upper portion of the punched hole is formed by a vertical surface. 2. The die according to claim 1, wherein the wedge-shaped groove is gradually narrowed from above to below. The die according to claim 1, 2 or 3, wherein the depth of the wedge-shaped groove is largest at an upper portion and gradually decreases toward a lower portion.

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