JPH07275964A - Passing cut die for punch press and passing cut method - Google Patents

Abstract

PURPOSE:To execute clean cutting without a joining part and working of a long slit without any catching with a slit piece at the time of feeding the sheet material. CONSTITUTION:In a die for executing a punching with to steps of slit-formation process and a shearing process of the slit piece Wa by arranging a punching edge part 3 and a slitting edge part 4 in the punch 1, the lower surface of the slitting edge part 4 in the punch 1 is formed as the reverse shallow V shape and also, the neighbor part of a through-hole 6 for punching at the bottom surface 7a of the recessed part 7 for slitting in the die 2 is formed to shallow. By this method, at the time of slitting the slit piece Wa is made to be formed to the reverse shallow V shape. This formed slit piece Wa is protruded upward from the upper surface of the die by energizing force of an elastic body 11 for return-back at the time of using the punch 1. In such reverse shallow V shape formation, the feeding of the sheet material is made to be executed in the condition of perfectly returning back to rising of the slit piece Wa. Further, a recessed part 5 for releasing the tip part of the slit piece Wa is formed in the punch 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punching press die and a punching cutting method of a punch press for forming a continuous punching hole in a plate material work.

[0002]

2. Description of the Related Art When a plate material is cut using a punch press or a long slit is processed, a long-angle punch is usually used as a die and a large number of punches are used. A method of continuously processing punched holes is adopted. However, this processing method has a problem that a seam is formed on the cut surface of the plate work between the punch holes that are continuously formed.

As a punching method for eliminating such a seam, a punch having a slanted tip surface is used, and only a cut is made without punching a plate work, and the next cut is continued to the previous cut. A method of processing has been proposed. According to the processing method in which the cuts are sequentially made in this manner, the cut surface is continuously and neatly finished. However, this method has a problem in that it is difficult to discharge since scraps are continuously generated.

As a method for solving these problems, a punch is provided with a punching blade portion and a cutting blade portion side by side, two parallel cuts are made in a plate material work, and then a tongue-like shape between the cuts is formed. Feed the plate so that the cutting piece is located at the punching blade,
A method of cutting the cut piece by the next punching operation and processing a new cut following the cut was proposed (Japanese Patent Application No.
110912).

However, in the above proposed method, the tip of the cutting piece may be in a plastically deformed state inclining downward from the plate work, and the tip of the cutting piece is caught on the inner surface of the die as the plate material is fed. May collapse. When the cut piece is crushed in this way, the next cut following the cut piece does not continue well, and the cut surface of the plate work does not become a sufficiently clean continuous cut surface.

An object of the present invention is to provide a punching punching die and punching punching method of a punch press which can eliminate a catch of a cutting piece at the time of feeding a plate material and can perform a clean cutting without a seam and a processing of a long slit. Is.

[0007]

A punching die for a punch press according to the present invention comprises a punch and a die having the following constitutions. That is, the punch has a punching blade portion and a cutting blade portion which are aligned with each other, and the die has a punching through hole and a cutting recess portion into which the punching blade portion and the cutting blade portion enter, respectively. . At least one of the punch and the die is provided with a guide means for locating the tip of the cutting piece cut by the cutting blade portion and the cutting recess of the plate work above the lower surface of the plate work, or A shaping part is provided for shaping the insert piece into a reverse shape. The guide unit and the shaping unit may have a function as a shaping unit and a function as a guiding unit, respectively.

Between the cutting blade portion and the punching blade portion of the punch, there may be provided a relief recess for letting the tip of the cutting piece of the plate work escape.

According to the additional punching cutting method of the punch press of the present invention, punching by the punch and the die is performed in two steps, and
The second step is a method in which a cut is made and the second step is cut off. In this case, the tip of the cut piece in which the plate work has been cut is positioned above the lower surface of the plate work before the next feeding of the plate work. Alternatively, the cut piece is shaped into an inverted shape in the punching process of making a cut.

[0010]

According to this punching die and punching method, the tip of the cutting piece processed by the cutting blade portion of the plate work is returned to the upper surface of the die or shaped in the reverse shape. Since the plate material is fed in this state, the cut piece does not get caught on the inner surface of the die along with the feeding operation, and smooth feeding can be performed. In this way, catching at the time of feeding is prevented, so that a clean cut surface without a seam can be obtained. Even if the tip of the cutting piece is not necessarily returned to the upper surface of the die, if it is shaped like an inverted shape, it will bend further downward due to contact with the inner surface of the die as it is fed. Smooth feeding is performed without any trouble. Even if the cutting piece is not necessarily shaped in the reverse shape, if the tip is in the state of being returned to the upper surface of the die, it does not rub against the inner surface of the die at the time of feeding and smooth feeding is possible. Can be done.

When the relief recess is provided between the cutting blade portion and the punching blade portion of the punch, the tip of the cutting piece can be escaped into the recess portion, and therefore, the tip of the cutting piece is guided by the guide means. Good guidance can be given to the upper part, and shaping in the reverse shape by the shaping part can be performed well.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. The punching cutting die of this punch press is
It consists of the punch 1 and the die 2 of FIG. The punch 1 has a blade portion 1a whose cross-sectional shape is oblong, and the tip of the blade portion 1a is formed with a punching blade portion 3 and a cutting blade portion 4 which are aligned with each other in the width direction. Therefore, the punching blade portion 3 and the cutting blade portion 4
Means that they have the same thickness and both surfaces are in the same plane. The punching blade portion 3 is formed to have a protruding height H higher than that of the cutting blade portion 4, and a relief recess 5 penetrates between both sides of the punching blade portion 3 and the cutting blade portion 4 to form a groove shape. It is formed on. The edge portion of the punching blade portion 3 on the cutting blade portion 4 side is a cutting piece cutting edge 3
a. The width dimension A of the punching blade portion 3 and the width dimension B of the portion extending from the relief recessed portion 5 to the cutting blade portion 4 are substantially the same, and the edge 3a is located substantially at the center of the punch 1. The cutting blade portion 4 is formed in a front shape in which the tip end surface is in the shape of an inverted letter, and the punch side shaping portion 4a is formed by this tip end surface. In the V-shaped shaping portion 4a, the inclined surface portion 4a1 on the center side of the punch 1 is short and the inclined surface portion 4a2 on the outer peripheral side is long. The vertical cross-sectional shape of the cutting blade portion 4 has a flat tip surface as shown in FIG. 4 (A), but as a sloped surface opened in a V shape as shown in FIG. 4 (B), the cutting edge 4b. , 4b may be formed at an obtuse angle. By making an obtuse angle like this,
The blade does not easily spill, and the sharpness lasts for a long time.

The die 2 has a substantially circular plan shape (see FIG. 2), and the punching penetrating portion 3 and the cutting blade portion 4 of the punch 1 respectively enter the fitted state on the upper surface thereof. The hole 6 and the cutting recess 7 are formed adjacent to each other. Recess for cutting 7
The bottom surface 7a of the plate is located at a position lower than the upper surface of the die by a height corresponding to the plate thickness of the plate work W according to the plate thickness to be processed.
A portion of the bottom surface 7a near the punching through hole 6 serves as a die-side shaping portion for shaping the plate work W into a V shape. In the punching through hole 6, the pair of long side opening edges 6a, 6a and the short side opening edge 6b on the upper surface are punching edges, and the opening edge with respect to the bottom surface 7a of the cutting recess 7 is the cutting edge 6c. Becomes In the cut recess 7, the pair of long side opening edges 7c, 7c on the upper surface serve as cut forming edges, and the opening opening edges 7d are smooth corners.

A pushing mechanism 9 is provided in the cutting recess 7. The pushing mechanism 9 includes a pushing member 10 that fits in a guide hole 8 formed in the bottom surface 7a of the cut recess 7 so as to be able to move up and down, and a return elastic body 11 such as urethane resin that pushes and pushes the pushing member 10. Composed of. The restoring elastic body 11 is installed on the support 12. The upper part of the guide hole 8 is a recess 7 for cutting.
Is formed in the slit-shaped portion 8a having the same width as the above, and the lower portion is formed in a circular wide hole 8b having a diameter of the entire length of the slit-shaped portion 8a. The pushing member 10 includes a standing piece portion 10a that fits into the slit-shaped portion 8a and a disc-shaped stopper portion 1 below the standing piece portion 10a.
0b, and the stopper portion 10b is urged upward by the restoring elastic body 11 to a height at which the stopper portion 10b engages with the edge portion of the lower opening of the slit-shaped portion 8a of the die 2. In this state, the upper end surface of the pressing member 10 is flush with the upper surface of the die 2. Slit-shaped part 8
The upper surface opening edge 8a1 of the a on the punching through hole 6 side is an inclined surface. This pushing mechanism 9 and the shaping section 4a on the punch 1 side
And the bottom surface 7a, which is the shaping part on the die 2 side, constitute the guide means 30 for positioning the tip of the cut piece Wa of the plate work W above the lower surface of the plate work W.

FIG. 3 shows an example of a support structure for the punch 1. The punch 1 is attached to a punch holder 13 with a set bolt 14, and the punch holder 13 is fitted via a guide 15 in a mold installation hole 17 of a turret 16 so as to be able to move up and down. The punch holder 13 engages a ram 20 of a slide drive mechanism (not shown) with its T-shaped head and is driven up and down. By this elevating drive, the punch 1 moves up and down from the upper end position shown in FIG. 1 (A) to the lower end position shown in FIG. 1 (B). The slide drive mechanism may be a crank type or a hydraulic type. The guide 15 is movable up and down, and is biased downward by a pressing spring 18, and a stripper plate 19 is attached to the lower end.

Next, a method of punching and cutting using the above mold will be described. FIG. 5 shows a case where the cutting process is started from the end of the plate work W. First, as shown in FIG. 1A, the punching operation is performed with the plate work W at a position where the end of the work W rests only on the cutting blade portion 4 of the punch 1. As a result, two parallel cuts a are formed in the plate work W at the edges on both sides of the cutting blade portion 4 as shown in FIG. After that, by repeating the feeding of the plate work W in the direction of the arrow b and the punching operation, as shown in FIG. 7C, the plate work W is formed into a tongue shape in which the cuts a are sequentially formed in the preceding punching process. The cut piece Wa is cut by the punching blade portion 3 of the punch 1, and a new cut a'following the cut a is formed by the cutting blade portion 4. In this way, the punch holes S having the width of the two cuts a are continuously formed, and the plate work W is separated or the long slit is formed.

FIGS. 5 (D) to 5 (F) are explanatory views showing a process in the middle of this pre-punching and cutting in section. The plate material is fed after each punching operation as shown in FIG. 5 (D) so that the cutting piece Wa formed in the preceding punching process may extend halfway over the punching through hole 6 of the die 2. . In this state,
As shown in (E) (FIG. 1B), the punch 1 is lowered to the lower end position. Thereby, the cut piece Wa of the plate work W
Is cut by the edge 3a on the center side of the punching blade portion 3 of the punch 1 and the edge 6c of the die 2, and is dropped and discharged as a punching piece Wb. At this time, in the cutting blade portion 4 of the punch 1, a new cut a'following the cut a of the plate work W (see FIG. 5).
(C)) is formed, and the cutting piece Wa between the cuts a'and a'is received at the bottom surface 7a of the cutting recess 7 of the die 2, so that the cutting blade portion 4 of the punch 1 is formed. Is shaped into a reverse shape along the shaping portion 4a which is the lower surface of the. At the time of this shaping, the tip of the notch piece Wa can escape into the escape recess 5 of the punch 1, so that the shaping is not hindered.
Good shaping is done. In addition, the push member 10 of the push-up mechanism 9
Is pushed down by the punch 1 through the cut piece Wa,
The elastic body 11 is in a compressed state.

When the punch 1 rises, the notch piece Wa is pushed up by the pushing member 10 by the restoring force of the elastic body 11 as shown in FIG. 5 (F). At this time, since the cut piece Wa is shaped in an inverted shape, the tip end portion is completely raised above the lower surface of the plate work W. Therefore, when the cutting piece Wa is moved onto the punching through hole 6 of the die 1 in the next plate material feeding process, the cutting piece Wa is not caught on the inner surface of the punching through hole 6 and is smooth. The plate material is fed to. Therefore, the cut piece Wa is not crushed, and the cut a,
a'is continuous neatly. In this way, it is possible to perform seamless cutting and long slit processing.

6 and 7 show another embodiment of the present invention. This example is an embodiment in which the punching cutting die is a so-called index tool capable of indexing an angle.
In this punching and cutting die, the punch 1 is movably held by a die holder 21 having a worm wheel 21a on the outer peripheral surface thereof, and the die holder 21 is rotatably mounted on the punch turret 16. A worm wheel 21a of the die holder 21 is meshed with a worm gear 25 provided on a rotary shaft 23 arranged in the radial direction of the turret 16, and the rotary shaft 23 can be rotated by a driving means (not shown). Thus, the rotation is transmitted to the die holder 21 so that the punch 1 can be oriented in a desired direction. The worm wheel 21a, the driving means, and the like constitute a punch-side mold rotating device 28. The direction of the die 2 is also changed in synchronization with the punch 1 by the die side die rotating device 29 having the same configuration as the punch side die rotating device 29. That is, the die 2 is held by the die holder 22 that is rotatably mounted on the die side turret 27, and the worm wheel 22 a on the outer peripheral surface of the die holder 22 has the rotating shaft 24.
The worm gear 26 is engaged with the rotary shaft 24 and the rotary shaft 23 on the punch side is rotationally driven by the driving means. Thereby, processing can be performed in a desired direction. The boundary between the punching blade 3 of the punch 1 and the relief recess 5 is set to be the center of the punch holder 13, and when the punch 1 and the die 2 are turned by 180 °, the plate work W The punching blade portion 3 and the cutting blade portion 4 are replaced with each other. The other structure is almost the same as that of the previous embodiment.

In the case of this punching cutting die, when the punching cutting is stopped in the middle of the plate work W, the end processing can be favorably performed as shown in FIG. FIG. 7 (A) shows the time of punching one time before the final punch when the punching is advanced in the direction of arrow c, and the notch a extends from the punch hole. When the final punch is performed, the punch 1 and the die 2 are indexed and rotated by 180 ° as shown in FIG. 7B, and are retracted by a minute distance, and then the punch operation is performed. As a result, the cutting piece Wa remaining at the processing end can be cut to perform slit processing or cutting processing in a shape in which no extra cutting remains.

FIG. 8 shows a third embodiment. In the punching die of this embodiment, the pushing mechanism 9 on the die 2 side in the first embodiment is omitted, and instead of this, the shaping portion 4a of the punch 1 is formed on the bottom surface 7a of the cutting recess 7 in the die 2. The shaping portion 7d having an inclined surface is formed to follow the inclined surface 4a ₁ near the relief recess 5. The other structure is the same as that of the first embodiment.

In the case of this embodiment, as shown in FIG. 8B, when the punch 1 is lowered to cut the cut piece Wa and form the cut, the shaping section 4a on the punch 1 side and the die 2 side. The cutting piece 4a is sandwiched between the shaping section 7d and the shaping section 7d and shaped in the reverse shape. When the punch 1 rises, the cut piece Wa shaped in a reverse shape returns to the upper surface of the die by the elastic restoring force of the material of the plate work W. Therefore, also in the case of this configuration, the cutting piece Wa is not caught at the time of feeding the plate material, the plate material feeding operation is smoothly performed, and a clean cutting process without a joint can be performed.

FIG. 9 shows a fourth embodiment. In the punching cutting die of this embodiment, the punch 31 is divided into a punching blade portion 33 and a cutting blade portion 34. A relief recess 35 is formed in a portion near the punching blade portion 33 on the cutting blade portion 34 side.
In the die 32, an end edge of the bottom surface 37a of the cutting recess 37 near the punching through hole 36 is a cutting edge 36a. Also in this embodiment, the pushing mechanism 9 in the first embodiment is omitted. The other structure is similar to that of the first embodiment.

In this embodiment, as shown in FIGS. 9 (A) and 9 (B), the punching blade portion 33 and the cutting blade portion 34 of the punch 31 are initially lowered as a unit, and first, the cutting blade portion is formed. The cut is processed at 34, and then the tip end of the cut piece Wa is cut by further lowering of the punching blade 33 as shown in FIG. 9 (C). on the other hand,
The lowering of the cutting blade portion 34 is stopped by the bottom surface 37a of the die 32, and the cutting piece Wa newly machined at this time is the cutting blade portion 3a.
It is sandwiched between the shaping section 34a of No. 4 and the bottom surface 37a, and shaped in an inverted shape. By this shaping, the cut piece Wa is prevented from being caught when the plate material is fed as in the above-described embodiment.

In each of the above embodiments, the lower surface of the cutting blade portion 4 of the punch 1 is formed in an inverted shape, but the lower surface of the cutting blade portion 4 may be an inclined surface having no bent portion. Alternatively, it may be a curved surface. Further, the bottom surface 7a of the recess 7 for cutting which serves as the shaping portion of the die 1 does not necessarily have to be provided.

[0026]

According to the punching die and punching method of the punch press of the present invention, the punching by the punch and the die is performed in two steps, the first step is to make a cut, and the second step is to cut off. , And the tip of the notched cut piece of the plate work should be positioned above the lower surface of the plate work before the next plate feed, or the cut piece should be in the reverse shape during the punching process to make the cut. Since the tip of the cutting piece of the plate material work is not caught on the inner surface of the die along with the plate material feeding, smooth feeding can be performed because it is shaped into
It can perform clean cutting and long slit processing without seams.

When a relief recess is provided between the cutting blade portion and the punching blade portion of the punch, the leading end of the cutting piece escapes into the recessed portion, so that the guide means moves the tip of the cutting piece upward. And the shaping by the shaping unit can be performed in the reverse shape.

[Brief description of drawings]

FIG. 1A is a cutaway side view of a punching die according to a first embodiment of the present invention, and FIG. 1B is an explanatory view of its action.

FIG. 2 is a plan view of a die in the mold.

FIG. 3 is a cross-sectional view showing a punch support structure of the same die.

FIG. 4 is a vertical sectional view of a blade portion of a punch in the mold.

FIG. 5 is an operation explanatory diagram.

FIG. 6 is a cutaway side view of a punching die according to a second embodiment of the present invention.

FIG. 7 is an operation explanatory view of a processing end portion by the same punching die.

FIG. 8A is a cutaway side view of a punching die according to a third embodiment of the present invention, and FIG. 8B is an explanatory view of its action.

FIG. 9 is an operation explanatory view of the punching die according to the fourth embodiment of the present invention.

[Explanation of symbols]

1, 31 ... Punch, 2, 32 ... Die, 3, 33 ... Punching blade section, 4, 34 ... Cutting blade section, 4a, 8b, 34a ... Shaping section, 5, 35 ... Relief concave section, 6, 36 ... Through hole for punching,
7, 37 ... Cutting recess, W ... Plate work, Wa ... Cutting piece

Claims (5)

[Claims] 1. A punch having a punching blade portion and a cutting blade portion arranged side by side, and a punching through hole and a cutting recessed portion into which the punching blade portion and the cutting blade portion enter, respectively. At least one of the punch and the die is provided with a die, and a guide means for locating the tip of the cutting piece that is cut by the cutting blade portion and the cutting recess of the plate work above the lower surface of the plate work. A punching die for punch punches provided. 2. A punch having punching blades and cutting blades that are arranged side by side, and a punching through hole and a recess for cutting into which the punching blades and cutting blades respectively enter. A punch provided with a die, and a shaping unit for shaping a cutting piece having a cut by the cutting blade portion and the cutting recess of the plate work into a reverse shape in at least one of the punch and the die. Press punching die. 3. The punching punching of a punch press according to claim 1, wherein a relief recess is provided between the cutting blade portion and the punching blade portion of the punch to allow the tip of the cutting piece of the plate work to escape. Mold. 4. In a punching cutting method in which punching with a punch and a die is performed in two steps and a first step is a cut, and a second step is a cut-off, the tip of the cut piece of the plate work is cut. , A punching press cutting method of a punch press which is positioned above the lower surface of the plate work before feeding the plate. 5. A punching and cutting method in which punching with a punch and a die is performed in two steps and a first step is a cut and a second step is a cut-off, in which a tip of a cut piece of a plate work is cut. , The punching punching method of punch press to shape in a reverse shape in the punching process to make a cut.