JP6019477B2 - Punching die for overtaking used in punch presses and overtaking method using the die - Google Patents

Description

TECHNICAL FIELD The present invention relates to a punching die for a punching process used in a punch press for preventing a rise of a residue with a hook in a punching process using a punch press and a punching process method using the die.

As is well known in the art (for example, Japanese Patent Application Laid-Open No. 2009-113057), when a workpiece W stretched with a film F (FIG. 9A) is punched with a punch P (FIG. 11A) and a die D, The film F on the surface extends and protrudes in an annular shape toward the inside of the hole H1.

9A (projecting portion 40) is a top view in a state of protruding into the inside of the punched hole H1, FIG. 9B is a perspective view, and FIG. 11A is a sectional view (FIG. 9A). A cross-sectional view when the direction of the hole H1 is viewed from the right side of FIG.

  As for the actual size, for example, if the area of the hole H1 of the workpiece W (FIG. 9A) is 5 mm × 50 mm, the area of the hole h1 of the film F is 4.9 mm × 49.9 mm.

Then, after punching out the workpiece W stretched with the film F, the residue K1 is discharged (FIG. 9C, FIG. 11A), and the residue K1 of the film F adheres to the residue K1. .

9 and 11A described above is a case where the workpiece W with the film F stretched is once punched to form one punch hole H1, but the same punch P (FIG. 11) is used. (A)) and a die composed of a die D, when a punch hole longer than one punch hole H1 is formed, a follow-up process described later is performed.

  That is, similarly, after forming the first hole H1 in the workpiece W with the film F (FIG. 10) stretched, the workpiece W is moved to the left side, for example, and the processing position is set to the punch center C (FIG. 8B). ), The second punching process is performed by overlapping the first punching hole H1 (FIG. 10) to form the punching hole H2.

  As a result, a hole H1 + H2 longer than the hole H1 by the length of the hole H2 is formed (FIG. 10).

JP 2009-1113057 A

However, when the second punching process is performed (FIG. 10), in the overlap region R12, in short, the portions 26 and 27 of the protruding portion 40 formed in the first shot are cut. However, the portions 28 and 29 surrounded by the broken-line circle are not cut ([0015] to [0017] in the above Japanese Patent Application Laid-Open No. 2009-113057).

As a result, the residue K2 with the reeds 26 and 27 (the residue k2 of the film F adheres) remains in the suspended state (FIG. 11B). Occurs, causing various problems such as adhesion of the residue K2 to the back surface of the workpiece W and scratching.

  Therefore, conventionally, as shown in FIG. 2 and FIG. 3 of the Japanese Patent Application Laid-Open No. 2009-113057, the overlap region (the amount of overlap α in the Japanese Patent Application Laid-Open No. 2009-113057) is made small, so , 27 is prevented.

However, the invention disclosed in Japanese Patent Application Laid-Open No. 2009-113057 relates to a punch press control means, and there are many problems such as that the change is not easy.

An object of the present invention is to prevent the rise of the hooked residue generated in the overtaking process with a simple configuration.

In order to solve the above problems, the present invention, as shown in FIGS.
A slit 22, 23, 24, 25 for cutting is provided at the corner of the rectangular blade edge 21, and the width of the slits 22, 23, 24, 25 for cutting (FIG. 2) is 0.2 mm to 0.3 mm. A punching die for use in a punching press used in a punch press (claim 1);
As shown in FIG. 4 to FIG. 7, a punching method using a punch press punching die D provided with slits 22, 23, 24, 25 for cutting at the corner portion of the rectangular blade edge 21 ,
(1) By using the punch press punching die D with the workpiece W stopped and lowering the corresponding punch P, a punching hole by punching in the previous step (for example, the first step (FIG. 4)) When the punching process of the process (for example, the second shot (FIG. 4)) is performed by overlapping with H1, and the punch hole H2 of the process is formed, it is a scrap of the process and the overlap region R12 In FIG. 5, the hooked slag K2 connected to the workpiece W through the hooks 26 and 27 is generated (FIG. 5).
(2) By cutting the wrinkles 26, 27 of the reed casks K2 generated in the overlap region R12 by sending the workpiece W for punching in the subsequent process (for example, the third shot (FIG. 4)) Bite into the slits 22, 23, 24, 25 (FIG. 6),
(3) After that, by further feeding the workpiece W continuously, the scissors 26, 27 of the scissors K2 are shredded by the scissor cutting slits 22, 23, 24, 25, thereby Drop K2 from the workpiece W (Fig. 7)
The technical means of the overtaking method (Claim 3) is provided, characterized in that the above (1) to (3) are repeated until the end of the processing.

Therefore, according to the configuration of the present invention, by providing the slits 22, 23, 24, 25 for cutting with an inclination angle of, for example, 135 ° in the corner portion of the rectangular blade edge 21 (FIG. 2), As shown in FIG. 5, when the second punch hole H2 is formed by overlapping the punch hole H1 by the first punch process (FIG. 4) and performing the second punch process, The second punched residue, which is a hooked residue K2 connected to the workpiece W via the flanges 26 and 27 in the overlap region R12, is then generated as shown in FIG. 4) By sending the workpiece W for punching, the rivets 26, 27 of the casket K2 generated in the overlap region R12 are bitten into the chopping slits 22, 23, 24, 25, and thereafter As shown in FIG. By continuously feeding the work W, the scissors 26 and 27 of the scissors K2 are shredded by the scissors 22, 23, 24, and 25 to drop the scissors K 2 from the work W. These operations were repeated until the end of processing.

As described above, according to the present invention, it is possible to realize a very simple configuration in which the slits 22, 23, 24, 25 for cutting are provided at the corners of the rectangular blade edge 21 (FIGS. 1 to 3). Therefore, while feeding the workpiece W to the flanges 26 and 27 of the hooked K2 (FIG. 5) connected to the workpiece W generated in the overlap region R12 (FIG. 4) of the overtaking process, the above-described slit cutting slit 22 is fed. , 23, 24, and 25 (FIG. 6), and torn off with the slitting slits 22, 23, 24, and 25 (FIG. 7), the hooked casks K2 is dropped from the workpiece W. As a result, a simple configuration has the technical effect of preventing the rise of the hooked residue generated in the overtaking process.

FIG. 3 is a perspective view showing a punch die D for punch press according to the present invention. It is a top view which shows the slit 22 for cutting, 22, 23, 24, 25 which comprises this invention. FIG. 3 is an enlarged perspective view of FIG. 2. It is a figure explaining the overtaking method by this invention. It is explanatory drawing of the generation | occurrence | production operation | movement of the hooked residue K2 in FIG. It is explanatory drawing of the biting operation | movement of the dregs residue K2 in FIG. It is explanatory drawing of the pulling and shredding operation | movement of the casket K2 in FIG. It is a figure which shows the example of application of this invention. It is explanatory drawing of the 1st start in the conventional overtaking method. It is explanatory drawing of the 2nd shot in the conventional overtaking method. It is sectional drawing of FIG. 9, FIG.

Hereinafter, the present invention will be described by way of example with reference to the accompanying drawings.
FIG. 1 is an overall view showing an embodiment of the present invention.

A punch press punching die D shown in FIG. 1 is applied to, for example, a turret punch press (FIG. 8), and a rectangular cutting edge 21 is provided on the upper surface of a main body 20 (FIG. 1). 30 is also provided with a similar rectangular cutting edge 31.

With this configuration, an upper turret 6 (FIG. 8B) and a lower turret 7 which will be described later are rotated synchronously, so that the punching die D (FIG. 1) according to the present invention and the punch P corresponding thereto described above are punch centered. C (FIG. 8B) can be selected.

Thereafter, similarly, if the carriage 12 and the carriage base 11 are moved by driving an X-axis motor Mx (FIG. 8A) and a Y-axis motor My, which will be described later, the gripping device 13 grips them. The workpiece W is fed, and the processing position (for example, the position where the punching hole H1 (FIG. 4) is processed) can be positioned at the punch center C (FIG. 1, FIG. 8B).

In this state, for example, if the punch P is beaten with the electric striker 2 (FIG. 8B), the punch D and the die D are used in cooperation with the punch D and the die D according to the present invention (FIG. 1). The overtaking method (FIGS. 4 to 7) according to the invention can be carried out.

Further, the corners of the rectangular cutting edge 21 of the die D (FIG. 1) are provided with slits 22, 23, 24, 25 for cutting, and the width of each slit (FIG. 2) is 0.2 mm to 0.2 mm. The length is 3 mm and the length is about 1 mm to 2 mm.

If the rectangular cutting edge 21 is composed of four sides (FIG. 2) a, b, c, and d, the corner provided with the slits for cutting 22, 23, 24, and 25 is provided. The parts exist at the positions of intersections p, q, r, and s of the orthogonal sides a and b, b and c, c and d, and d and a.

In addition, the line segments A, B, C, and D passing through the center in the longitudinal direction in each of the slits 22, 23, 24, and 25 are the orthogonal sides a and b, b and c, c and d, d described above. As shown in the figure, the angle of inclination of each slit is 135 °, and it is outside the workpiece W feed direction (Y-axis direction or X-axis direction). Facing.

However, contrary to the above, the slitting slits 22, 23, 24, 25 can be directed inward with respect to the feed direction of the workpiece W.

FIG. 3 is an enlarged perspective view of the above-described slits 22, 23, 24, and 25 for cutting, and the slit 23 is drawn as an example.

  As described above, the width (FIG. 2) of the slit 23 is approximately 0.2 mm to 0.3 mm, the length is approximately 1 mm to 2 mm, and the depth T (FIG. 3) is a rectangular cutting edge 21. Therefore, it can be said that the slit 23 is an extension of the rectangular blade edge 21, and the same applies to the other slits 22, 24, 25.

Actually, as will be described later (FIG. 4), in the overtaking method according to the present invention, the above-described slits 22, 23, 24, and 25 for the scissors K 2 (FIG. 5) generated in the overlap region R 12. There is a function that, after the bites 26 and 27 are bitten while feeding the workpiece W (FIG. 6), the rods 26 and 27 are further shredded by continuously feeding the workpiece W.

Therefore, the slits 22, 23, 24, and 25 for cutting can be said to be cutting edges for cutting the ridges 26 and 27 formed with the film F (however, the workpiece W on which no film is stretched is overtaken) In this case, the above-described slits 22, 23, 24, and 25 are used as cutting edges for cutting the ridges 26 and 27 made of metal).

  Hereinafter, the overtaking method according to the present invention will be described in detail with reference to FIG.

・ About the operation to generate the scraped K2
That is, the second punching process is performed by overlapping the punching hole H1 by the first punching process (previous process) (FIG. 4), and the second punching process (corresponding process). Form.

  As a result, a hole H1 + H2 longer than the hole H1 by the amount corresponding to the hole H2 is formed in the workpiece W (FIGS. 4 and 5).

  However, when such an overtaking process is performed, as described above, it is a second dregs (corresponding step), and in the overlap region R12 (FIG. 4), the punches 26 and 27 are interposed. In some cases, the hooked residue K2 connected to the workpiece W may be generated. The generation operation of the hooked residue K2 will be described in more detail with reference to FIGS.

That is, as described above, the protruding portion 40 of the film F is formed in the inside of the punched hole H1 formed by the first punching process (previous process) (FIG. 4). .

When the punching hole H2 is formed by overlapping the punching hole H1 and performing the second punching process (FIG. 4), the portion 26 of the protruding portion 40 in the overlap region R12, 5, 27 is cut by the cooperation of the blade edge 31 of the punch P and the upper edges 43 and 44 of the first punching hole H1 (previous process).

In other words, in the case of punching of the second shot (the process) (FIG. 4), the upper edges 43 and 44 of the punch hole H1 (FIG. 5) of the first shot (previous process) in the overlap region R12. However, by having a function instead of the cutting edge 21 of the die D and cooperating with the cutting edge 31 of the punch P, the portions 26 and 27 of the protruding portion 40 are cut.

However, on the other hand, the portions 41 (FIG. 4) and 42 in the direction orthogonal to the overtaking direction (the direction of arrow α in FIG. 4) are the upper edge 43 of the first punching hole H1 (previous process). , 44 do not correspond to each other and may not be cut.

As a result, hooks 26 and 27 connected to the workpiece W are formed in the portions 28 and 29 (FIGS. 4 and 5) surrounded by the broken-line circles, and as described above, the hooked slag K2 with the hooks 26 and 27 is formed. It remains in a state of being suspended (attached to the residue F2 of the film F) (FIG. 5).

In other words, in the overlap region R12 (FIG. 5), the hooked residue K2 connected to the workpiece W through the hooks 26 and 27 is generated.

To summarize the above operations, when the punching process of the second shot (the relevant process) (FIG. 4) is performed by overlapping the punching hole H1 of the first shot (previous process) (FIG. 4), the punch P And the die D (FIG. 1), the workpiece W is punched and a punching hole H2 (FIG. 4) is formed. At the same time, the punch P and the first punching hole (previous process) are punched in the overlap region R12. Only the portions 26 and 27 of the protruding portion 40 are cut by the upper edges 43 and 44 of H1.

As a result, as described above, the scissors K2 connected to the workpiece W through the scissors 26 and 27 is generated in the overlap region R12 (FIG. 5).

・ About the bite operation of the casket K2 with a hook.
Next, as shown in FIG. 6, if the workpiece W is sent for the punching process of the third round (post process) (FIG. 4), the scraped residue generated in the overlap region R12 (FIG. 5). The ridges 26 and 27 of K2 can be bitten into the slits 22 and 23 for chopping.

As described above (FIG. 2), the width of the slit 23 shown in FIG. 6 is 0.2 mm to 0.3 mm, whereas the width of the flange 27 is 0.1 mm (in the description of [0004]). Based).

  Therefore, the scissors 26 and 27 of the scissors K2 generated in the overlap region R12 (FIG. 5) can sufficiently penetrate the scissors slits 22 and 23 by sending the work W (FIG. 6).

(3) About pulling and shredding operation of the casket K2 with a hook.
After that, as shown in FIG. 7, by further feeding the workpiece W continuously, the scissors 26, 27 of the scissors-sunk K2 are shredded by the scissors slits 22, 23, 24, 25, The hooked K2 is dropped from the work W.

That is, in the previous operation (FIG. 6), the hooks 26 and 27 of the hooked squirrel K2 can sufficiently bite into the hook cutting slits 22 and 23. In this state, as shown in FIG. If W is sent further continuously, only the scissors 26 and 27 are caught in the scissor slits 22 and 23 and then shredded.

  As a result, as shown in the figure, the flange 27 is divided into a part 27A on the workpiece W side and a part 27B on the residue K2 side, but the same applies to the flange 26 (FIG. 5). (FIG. 7) falls from the workpiece W.

The operations (1) to (3) are repeated until the end of machining.

FIG. 8 is a view when the present invention is applied to a turret punch press. The upper turret 6 and the lower turret 7 include punches D including the punching die D (FIG. 1) according to the present invention and the corresponding punches P. And the die D are arranged concentrically.

Chains 4 and 5 are wound around the rotation shaft 8 of the upper turret 6 and the rotation shaft 9 of the lower turret 7, and the chains 4 and 5 are wound around the drive shaft 3.

An electric ram 2 for hitting the punch P is provided on the upper frame 1 just above the punch P in the punch center C.

With this configuration, when the drive shaft 3 is rotated by the motor M and the chains 4 and 5 are circulated, the upper turret 6 and the lower turret 7 rotate synchronously, and a mold comprising a predetermined punch P and die D, for example, FIG. A punching die D and a punch P corresponding to the punching die D according to the present invention shown in FIG.

A Y-axis guide rail 17 is laid on the lower frame 19, and a support bracket 16 is slidably coupled to the guide rail 17, and the carriage base 11 is fixed to the support bracket 16. A ball screw 14 of a Y-axis motor My provided on the upper frame 1 is screwed into the base 11.

A carriage 12 to which the clamping device 13 is attached is slidably coupled to the carriage base 11 via an X-axis guide rail (not shown). The carriage 12 is connected to the X-axis motor Mx. The ball screw 15 is screwed.

Further, a table 10 is fixed at the center of the turret punch press, and a carriage base 11 is disposed across the fixed table 10. Side tables 10A and 10B on both sides of the fixed table 10 are carriage bases. 11 is attached.

With this configuration, when the X-axis motor Mx is rotated, the carriage 12 moves on the carriage base 11 in the X-axis direction, and when the Y-axis motor My is rotated, the carriage base 11 is moved to the side tables 10A and 10B. At the same time, it moves in the Y-axis direction.

Therefore, when the overtaking method (FIGS. 4 to 7) according to the present invention is performed, for example, the second punching according to the present invention on the workpiece W (FIG. 4) held by the clamp device 13 (FIG. 8). The processing position (thick line portion in FIG. 4) to be performed can be positioned at the punch center C (FIG. 8).

Similarly, for example, when the overtaking method (FIGS. 4 to 7) according to the present invention is performed, the Y-axis motor My (FIG. 8) is rotated to move the carriage base 11 in the Y-axis direction. As a result, the workpiece W gripped by the clamping device 13 is sent (FIG. 6) for the third punching process, and the scissors K2 generated in the second shot is cut into the slits 22, 23, 24 for cutting. 25, and by further feeding the workpiece W (FIG. 7), the hooked residue K2 can be shredded.

An object of the present invention is to prevent the clogging of the scissors generated in the overtaking process with a simple configuration, and the scissors for cutting 22, 23, 24 at the corner of the rectangular blade edge 21 (FIG. 1). 25, punching die D for punch press, and a punching method using the die D (FIG. 4), and a casket K2 with a hook connected to a workpiece W via hooks 26 and 27 in the overlap region R12. (FIG. 5), the ridges 26, 27 of the casket K2 are bitten into the slits 22, 23, 24, 25 for chopping (FIG. 6). , 27 is shredded by the above-described slits 22, 23, 24, and 25, and is used in a method of repeating the operation of dropping the hooked scrap K 2 from the workpiece W until the end of processing, Further, it is extremely useful for preventing the hooked residue from rising up regardless of whether or not the film F is stretched on the workpiece W (FIG. 1).

20 Die D main body 21 Die D rectangular cutting edge 22, 23, 24, 25 Saw cutting slits 26, 27 Ｐ 30 Punch P main body 31 Punch P rectangular cutting edge 40 Projection parts 43, 44 First shot (front Upper edge D of punching hole H1 in process) Die K1, K2 Waste k1, k2 of work W Waste P of film F Punch R12 Overlapping region between first (previous process) and second (corresponding process)

Claims (4)

A punching die for a punching process used in a punch press , wherein a slit for cutting is provided at a corner portion of a rectangular blade edge, and the width of the slit for cutting is 0.2 mm to 0.3 mm .   The punching die according to claim 1, wherein the slit for slitting faces outward with respect to a feeding direction of the workpiece. A punching method using a punch press punching die provided with a slit for cutting at a corner portion of a rectangular blade edge ,
(1) Using the punching die for punch press with the workpiece stopped, and lowering the corresponding punch, the punching process of the relevant process is performed by overlapping the punching hole by the punching process of the previous process. When the punch hole of the process is formed, after generating the scrap with the hook connected to the workpiece through the hook in the overlap region,
(2) By sending the workpiece for punching in the subsequent process, the wrinkles of the residue with the hooks generated in the overlap region are caused to bite into the slit for cutting.
(3) After that, by further feeding the work, the scissors of the scissors with a scissors are shredded with the scissor slits to drop the scissors with scissors from the work, and the above (1) to ( 3. Overtaking method characterized in that 3) is repeated until the end of processing. 4. The overtaking method according to claim 3, wherein a film is stretched on the surface of the workpiece.

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