JP2668182B2 - Simultaneous punching and bending press and processing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press die and method for cutting and bending a plate material, and more particularly to a press die and method for cutting a plate material, bending a side portion, and cutting a bent portion. The present invention relates to a simultaneous punching and bending press die and a processing method performed in one step.

2. Description of the Related Art With respect to bending of a sheet material in the prior art, as one example, a literature: Pressing Technology, Vol. 28, No. 5, (1990), pp. 26-27, a question form "Q7 The limit and bending method are as described in “Ibid.
The technique described in "How to determine the groove width of a Q16 V bending die and the width of a punch" on the page is known. FIG. 16 is a diagram for explaining the former conventional example,
In right-angle bending, the minimum dimension of the bending height h is the dimension obtained by adding the radius R inside the bending to 2.5 times the thickness t (h ≧ 2.5t + R).
It has been. Further, as shown in FIG. 17, the rising height h
When 1 is smaller than the minimum value of the bending height h, the bending height is set to h, and then the bending portion is set to h.
A step of cutting low to 1 is required.
FIG. 18 is a diagram for explaining the latter conventional example. Regarding the dimensions of the punch 2 and the die 3 for bending the plate 1, the thickness t of the plate 1
Then, the width Wp of the punch 2 and the width Wd of the die 3 are generally the same, and are in the range of 6 t or more and 8 t or less (6t ≦ Wd).
(Wp) ≦ 8t) is described as being suitable.
In view of the bending height h, the former (h ≧ 2.5t +
R) and the latter (6t ≦ Wd (Wp) ≦ 8t) theoretically match. Further, as another conventional example, Japanese Patent Application Laid-Open No. 62-62
JP-A-144825 discloses a press die in which a thin plate is cut into a predetermined size, and a step of bending the cut side portion is simultaneously performed in one stroke. According to this mold
The upper mold descends, and the cutting blade provided at the lower peripheral edge of the upper mold and the cutting blade provided at the peripheral edge of the hole of the lower mold cooperate to cut the thin plate. By cooperating with a concave portion provided at the tip of the mold and a convex portion provided in the hole of the lower mold, the side of the cut thin plate is bent. However, as shown in FIG. 19, the edge 1a of the plate edge generated at the time of cutting protrudes toward the outside of the product, as shown in FIG. 19, so that the appearance and dimensional accuracy of the bent portion are reduced. It may get worse.

In the prior art, three press dies, a punching die, a bending die, and a cutting die, are required to press the bending height h to (2.5 t + R) or less. In addition, in the case of mass production, there is a problem that transport equipment between processes is required, and even in the case of small-volume production, blanks of semi-finished products during work must be stored between processes. . In addition, the conventional press die that performs cutting and bending at the same time has a problem in that the burrs at the plate edge generated at the time of cutting come out of the product, so that the appearance of the bent portion and the dimensional accuracy are deteriorated. An object of the present invention is to provide a simultaneous punching and bending press die that can reduce the height of a bent portion of a product, has a good appearance and dimensional accuracy of a bent portion, and can perform cutting and bending at the same time. is there.

In order to achieve the above object, a first simultaneous punching and bending press of the present invention comprises a punch and a die which cooperate in punching and bending a plate, and a side face of the punch. A punch presser provided with a plate retainer movably provided in the axial direction of the punch and a plate retainer fitted into the hole of the die and slidably provided in the axial direction of the hole. The punch has a tip surface that is substantially perpendicular to the axis of the punch, a flat inclined surface that recedes and inclines from the tip surface, and a cutting edge formed on the outer edge formed by the tip surface and the flat inclined surface. On the other hand, the die is characterized by having a die hole having a shape corresponding to the outer contour of the punch as viewed in the axial direction, and a cutting edge formed at the opening edge of the hole. The second simultaneous punching and bending press of the present invention differs from the first simultaneous punching and bending press only in the shape of the punch, and the punch has a tip surface substantially perpendicular to the axis of the punch. And a step surface formed by stepping from the tip surface,
It is characterized in that it has a cutting edge formed at the intersection line between the tip surface and the step surface and the side surface of the punch. Furthermore, the third punching / bending simultaneous press die of the present invention includes the steps of:
A punch and a die that cooperate with the bending process, a plate holder that is provided on the side of the punch so that it can move in the axial direction of the punch, and can be inserted into the hole of the die and slide in the axial direction of the hole And a punching / bending simultaneous press type provided with a plate holder provided in the punch, wherein the punch is a surface substantially perpendicular to the axis of the punch and includes a tip surface including a straight side, and a straight side. A flat slope formed by cutting out a part along the side, a cutting edge formed at the intersection of the tip end surface and the side surface, and a cutting edge formed at the intersection of the cutout portion and the side surface. The blade has a cutting edge formed at an intersection line perpendicular to the side of the intersection line between the notch portion and the tip surface, and the die has a shape corresponding to the contour of the punch as viewed from the axial direction. Having a hole and a cutting blade formed at the opening edge of the hole, and a plate retainer fitted into the hole of the die, At the position facing the flat slope of the punch, there is a groove formed in the axial direction of the hole of the die, further slidably fitted along the groove, and on the slope corresponding to the flat slope of the punch and the slope of the slope. A movable die having the formed cutting blade is provided, and a pressing means for pressing the movable die in a punch direction is further provided.

In order to achieve the above object, a first simultaneous punching and bending press of the present invention comprises a punch and a die which cooperate in punching and bending a plate, and a side face of the punch. A punch presser provided with a plate retainer movably provided in the axial direction of the punch and a plate retainer fitted into the hole of the die and slidably provided in the axial direction of the hole. The punch has a tip surface that is substantially perpendicular to the axis of the punch and a part of the periphery of the tip surface is not cut.
Has a flat slope that recedes from the tip surface and slopes, and a cutting edge formed on the outer edge formed by the tip surface and the flat slope, while the die corresponds to the outer contour of the punch when viewed from the axial direction. 挾 the die holes having a shape, possess a cutting edge formed at the opening edge of the hole, and the punch and die plate during the processing of
When found, a space is formed between the flat slope of the punch and the surface of the plate.
And the tip of the die exceeds the space
It is characterized in that to have a click. The second simultaneous punching and bending press of the present invention is different from the first simultaneous punching and bending press only in the shape of the punch.
Of the tip surface, which is almost perpendicular to the axis of the punch ,
Possess a stepped surface formed with a stepped from partially notched to become the front end surface of the peripheral, and a cutting edge formed on intersection of the respective distal end surface and the step surface and the punch side, and Addition
When the punch and the die sandwich the plate material during
A space is formed between the step surface and the plate surface, and the die
Tip is characterized in that it has a stroke exceeding between the sky. Further, the third simultaneous punching and bending press of the present invention comprises a punch and a die which cooperate in punching and bending of a plate material, and a plate holder provided on a side surface of the punch so as to be movable in an axial direction of the punch. A punching / bending simultaneous press die having a plate press fitted into a hole of a die and slidably provided in the axial direction of the hole, wherein the punch has a surface substantially perpendicular to the axis of the punch. And a flat surface including a straight side, a flat slope formed by cutting a part of the straight side along the side, and a cutting line formed at a line of intersection between the front surface and the side surface. A blade, a cutting edge formed on a line of intersection between the cutout portion and the side surface, and a cutting edge formed on a line of intersection perpendicular to the side among lines of intersection between the cutout portion and the tip surface. The die has a hole with a shape corresponding to the contour of the punch as viewed from the axial direction, and a hole in the opening edge of the hole. It has been and a cutting edge,
The plate retainer fitted into the hole of the die has a groove formed in the axial direction of the hole of the die at a position facing the flat slope of the punch,
Further, a movable die having a slope corresponding to the flat slope of the punch and a cutting edge formed on the oblique side of the slope is slidably fitted along the groove, and a pressing for pressing the movable die in the punch direction is further provided. And a punch when processing
When the die clamps the plate, the flat surface between the punch and the plate surface
Has a space formed in it, and the tip of the die
It is characterized by having a stroke that exceeds it. Ma
Further, the simultaneous punching and bending method of the present invention provides the first punching
Use the simultaneous bending press die to move the member to the outer surface of the punch tip surface.
Punching and punching with the cutting edge of
Bend with the flat slope and the tip of the die and pan the bent end.
The cutting edge at the outer edge of the flat slope and the opening edge at the die hole
It is characterized by performing the cutting work in one stroke.

In the first simultaneous punching and bending press of the present invention, when the punch and the die relatively move and mesh with each other, first, the plate holders on the punch side and the die side sandwich the plate material, and then the edge of the punch tip surface. The plate material is cut by the cutting edge of the punch and the corresponding cutting edge portion of the die, and the flat surface of the punch is cut while cutting the plate material by the cutting edge of the inclined side of the flat slope of the punch and the corresponding cutting edge portion of the die. The plate is pushed and bent along the slope, and finally the end member is cut off from the bent portion by the cutting edge of the trailing edge of the punch flat slope and the corresponding cutting edge of the die. Thus, the plate material can be cut and bent in one step. In addition, after bending the plate material in this way, unnecessary member ends are cut off, and the bending action is again applied to the plate material at this separation, so it is assumed that the bending radius can be reduced, and thus the height of the bent portion is reduced. You can
Further, even if burrs appear on the cut surface, the dimensional accuracy of the product can be improved by facing the inside of the bending of the plate material. Second of the present invention
The punching / bending simultaneous press die has almost the same operation as that of the first punching / bending simultaneous press die, but the bending step is slightly different. That is, the plate material is cut by the cutting edge at the edge of the punch tip surface and the corresponding cutting edge portion of the die, and then the portion of the step portion of the punch that intersects with the tip surface and the cutting edge at the edge of the step surface The plate material is pressed and bent by the cutting edge part of the die to be cut, and finally the unnecessary member end is separated from the bent part by the cutting edge of the step surface of the punch and the corresponding cutting edge part of the die. With the second simultaneous punching and bending press die, the height of the bent portion can be reduced and the product external dimension accuracy can be improved, as in the case of the first simultaneous punching and bending press die. In the third simultaneous punching / bending press of the present invention, when the punch and the die relatively move and mesh with each other, first, the plate holder between the punch side and the die side sandwiches the plate material, and then the edge of the edge of the punch tip surface is formed. The plate material is cut by the cutting blade and the corresponding cutting edge of the die, and at the same time, the plate material portion corresponding to the notch is cut by the cutting edge on the oblique side of the movable die and the cutting edge on the tip end side of the cutout portion of the punch. While pressing the plate material against the flat slope of the punch, bending is performed, and after bending, the cutting edge of the die and the cutting edge formed on the lower edge of the inclined surface of the punch cut from the bent portion of the plate material Separate the end of the member.
This third punching / bending simultaneous pressing die also enables the first
The same effect can be obtained in the press mold of.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical sectional view showing the entire structure of a simultaneous punching and bending press die according to the first embodiment of the present invention, and FIG. 2 is a II- of FIG.
II arrow view, FIG. 3 is a III-III arrow view of FIG. As shown in FIG. 1, the punching / bending simultaneous pressing die of this embodiment includes a lower die on which a plate material 1 is placed and a punch 2 is provided, and a die 3 which punches and bends the plate material 1 in cooperation with the punch 2.
And an upper mold provided with. As an example of a product processed by the punching / bending simultaneous press die, a product in which the whole is substantially rectangular, the four corners of which are cut into squares, and one side of the rectangle is bent will be described. The lower die includes a rod-shaped punch 2, a lower holder 8 having a root end fixed to the punch 2, a holding plate 4 surrounding the side surface of the punch 2 and slidably attached in the vertical direction, the holding plate 4 and the lower holder 8. And a guide pin 10 that rises from the lower holder 8 in parallel with the axis of the punch 2 to push the upper surface of the presser plate 4 up to the same level as the upper surface of the punch 2. Punch 2
As shown in FIG. 2, the shape of the tip surface substantially perpendicular to the axis is the same as the plane figure of the product, and the tip of the punch 2 is the edge of the tip surface except for one side corresponding to the bent portion of the product. Is formed with a punch cutting edge 2A. And the side of the punch corresponding to the bent part of the product, over the entire length of the side,
The hypotenuse blade 2B is formed of a slope inclined downward in the direction of the side, and a punch cutting edge 2C is formed at the edge of the hypotenuse blade 2B. Then, the plate material 1 is placed on the top surface of the punch 2.
And the hypotenuse blade 2B that bends the plate 1 and the lower surface of the plate 1
A space S is formed between them. On the other hand, the upper die includes a die 3 having a hole to be fitted with the punch 2, an upper holder 9 to which the die 3 base end is fixed, a pressing plate 5 fitted into the hole of the die 3 so as to be movable up and down; A spring 7 that is provided between the plate 5 and the upper holder 9 and presses the pressing plate 5 downward, and a lower guide pin 1
0 and a guide bush 11 attached to the upper holder 9 so as to be slidably fitted. By fitting the guide bush 11 and the guide pin 10, when the punch 2 and the die 3 cooperate with each other, a predetermined gap g is formed between them.
Is maintained. Before the punch 2 and the die 3 cooperate with each other, the holding plate 5 is arranged so that the lower surface thereof protrudes from the tip (lower surface) of the die 3. As shown in FIG. 3, the die 3 has a die hole having the same shape as the plan view of the product, and a die cutting edge 3A is formed at the tip edge of the hole. Here, the die cutting edge corresponding to the bent portion of the product will be referred to as a die cutting edge 3B in order to distinguish it from others. Next, the operation of the punching / bending simultaneous pressing die of this embodiment will be described. In mounting the simultaneous bending press die on a press machine (not shown), an upper die having a die is mounted on an elevating portion of the press machine, and a lower die having a punch is mounted on a fixed portion of the press machine. Then, the plate material 1 to be processed is placed on the lower punch 2 and the pressing plate 4. Now, when the press machine operates and the upper die descends, first, the pressing plate 5 provided in the die 3 contacts the plate material 1 and is pressed by the spring 7 to press the plate material 1 onto the punch 2. When the upper die is further lowered, the die cutting blade 3A and the punch 2A cooperate to cut the plate 1 as shown in FIG. 4 while the die 3 and the presser plate 4 of the lower die sandwich the peripheral portion of the plate 1. At the same time, the die cutting blade 3B on the right side of the drawing is the punch hypotenuse blade 2
Bending is performed by pressing one side of the plate material 1 against B. During this bending process, the plate material 1 is prevented from moving laterally between the punch 2 and the die 3 so that the pressing plate 5 and the spring 7 are not moved.
Is pressed against the punch 2. When the upper die is further lowered after the bending work, as shown in FIG. 5, the portion outside the side of the bent plate material 1 is held by the die 3 and the holding plate 4, and the die cutting blade 3B and the punch are punched. It is separated from the plate material 1 in cooperation with the cutting blade 2C. At this time, even if burrs appear on the cut portion of the bent portion of the plate 1, the burrs come out inward of the product. Die 3 in this way
When the plate 1 is placed on the top surface of the punch 2,
Formed between the bent hypotenuse blade 2B and the lower surface of the plate 1
It has a stroke that enters below the space S. FIG. 6 shows the product processed as described above upside down. With reference to this figure, the processing procedure will be described again. After the upper die is lowered and the plate 1 is pressed by the punch 2, the side 20 of the plate 1
To 30 are cut by the die cutting blade 3A and the punch cutting blade 2A, and the side portion 40 is bent by the die cutting blade 3B and the punch oblique side blade 2B, and then the upper die is further lowered to the outside of the side 40. The portion is cut by the die cutting blade 3A and the punch cutting blade 2C. According to this embodiment, since the end of the bent portion is cut after the bending process, it is presumed that the bending action acts on the bent portion again at the time of the cutting and the bending radius can be made smaller, so that the rising height of the bent portion is reduced. A product having a low thickness can be obtained in one step, and even if burrs appear, the product comes out toward the inside of the product to maintain the dimensional accuracy of the product, and there is an effect that the appearance is not impaired. FIG. 7 shows a second embodiment of the present invention, in which the shape of the punch oblique edge 2B of the punch 2 is different from the slope of the first embodiment and is a stepped L-shaped blade 15. The shape of the die is the same as in the first embodiment. As described above, even if the L-shaped blade 15 is used instead of the punch hypotenuse blade 2B, the product shown in FIG. 6 can be obtained. The feature of the L-shaped blade 15 is that the punch cutting blade 2C is easily processed, but is easily worn. According to this embodiment, as in the first embodiment, it is possible to perform bending with a low rising height in one step, and it is possible to maintain the dimensional accuracy and good appearance of the product. Next, a third embodiment of the present invention will be described with reference to FIGS. ◆
The simultaneous punching and bending press of the third embodiment is configured to bend a part of the side of a plate material. FIG. 8 shows an upside down shape of a product having a bent portion in a part of its side. The outer shape of this product is almost the same as that shown in FIG. The difference is that the product shown in FIG. 6 is bent at one side, whereas the product shown in FIG. 8 is bent at a part of the side. FIG. 9 is an overall configuration diagram of the simultaneous punching and bending press die of the present embodiment.
The structure of the press mold in the position corresponding to the IX cross section is shown. 10 is a view taken along the line XX in FIG. 9, and FIG. 11 is XI in FIG.
It is an XI arrow line view. In this embodiment, components having the same functions as those of the first embodiment are denoted by the same reference numerals. In the punching / bending simultaneous pressing die of this embodiment, the punch 2 in the lower die, the holding plate 5 in the upper die, and the movable die 16 are used.
The other components except the spring 17 are functionally the same as those of the first embodiment, and the description of the functionally same components will be omitted. 9 and 10, the lower punch 2 has a hypotenuse blade 2D at a position corresponding to a bent portion 51 of a product (FIG. 8). FIG. 12 shows the hypotenuse blade 2D in more detail. The hypotenuse blade 2D is formed by cutting off a part of the side, having a slope inclined downward from the upper surface of the punch 2 toward the side, and the lower edge of the hypotenuse blade 2D. Is formed with a punch cutting edge 2E, and a punch cutting edge 2F is formed at the intersection of the notch and the upper surface of the punch 2. And the top of punch 2
Hypotenuse blade 2D that bends plate 1 when plate 1 is placed on
A space S is formed between and the lower surface of the plate material 1. on the other hand,
In the upper mold, as shown in FIGS. 9 and 11, the movable die 16 is provided at a position corresponding to the bent portion 51 of the product (FIG. 8). The movable die 16 is slidably fitted in a groove formed in the holding plate 5 in the vertical direction, and the surface of the movable die 16 positioned on the groove opening side is slidable with the surface of the hole of the die 3. In contact. A spring 17 for pressing the movable die 16 is provided between the movable die 16 and the upper holder 9. The tip of the movable die 16 has an inclined surface corresponding to the hypotenuse blade 2D formed on the punch 2, and a movable die cutting blade 16A is formed on a side edge of the inclined surface. The operation of the press die configured as described above will be described. After the plate material 1 to be processed is placed on the lower punch 2 and the holding plate 4 and the press machine is operated to lower the upper die, first, the holding plate 5 and the spring 7 provided in the die 3 By
The plate 1 is pressed onto a punch 2. When the upper die further descends, the die 3 and the punch 2A cooperate to cut the plate 1 as shown in FIG. 13 while the die 3 and the holding plate 4 of the lower die sandwich the periphery of the plate 1. . FIG. 13 illustrates the operation of the press die at a position corresponding to the XIII-XIII section of the product (FIG. 8). At this time, the side of the product 20-3
2 is cut. At the same time as this cutting, as shown in FIG. 14, the plate material 1 is bent by the die cutting blade 3B and the punch hypotenuse blade 2D on the right side of the drawing. And the sides 53 and 5 of the bent portion 51
4 (FIG. 8) is a movable die cutting blade 16 shown in FIG.
A and the cutting edge 2F of the punch 2 cutout portion (FIG. 12) cooperate. When the upper mold descends further,
As shown in FIG. 5, the die cutting blade 3B and the punch cutting blade 2E
Cuts the edge 52 of the portion 51 cut and bent by the movable die cutting blade 16A and the hypotenuse blade 2D , and cuts off the outer portion. At this time, the movable die 16 escapes in the direction of arrow E (upward). The movable die 16 is strongly pressed by a spring 17 in a direction opposite to the direction of the arrow E (downward), and is set to have a force larger than a cutting force of a portion corresponding to the sides 53 and 54 of the product (FIG. 8). There is. In addition, as mentioned above, the die 3
When the plate 1 is placed on the top surface of the punch 2, the plate 1 is bent.
Space formed between the inclined hypotenuse blade 2B and the lower surface of the plate 1
It has a stroke that goes below S. According to the present embodiment, the punching of the plate material and the bending of a part of the side can be performed in one step, and similarly to the first embodiment, the bending radius of the plate material can be reduced, so that the rising height of the bent portion can be reduced. A punched product having good dimensional accuracy and appearance can be manufactured.

According to the present invention, in a simultaneous punching / bending press die, a pair of punches and dies are punched except for one side (or a part thereof) of a plate material, and then one side (or a part thereof) is bent. After that, since it was configured to cut off the scrap from the bent part, the bent part of the plate material was subjected to bending again when separating the scrap, so that the bending radius could be reduced, the height of the bent part could be lowered, Further, since the end portion of the bent portion is cut off after the bending process, even if burrs are produced during cutting, the burrs will appear inside the product and the product precision and appearance can be improved. Further, according to the present invention, in order to reduce the height of the bent portion of the plate material, the press dies required for each of the three steps of punching, bending, and cutting can be reduced to one, and the processing is accordingly performed. This has the effect of reducing time, eliminating in-process products between processes, and reducing the number of press transfer machines and press machines.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a simultaneous punching and bending press die according to a first embodiment of the present invention.

FIG. 2 is a view taken in the direction of arrows II-II in FIG.

FIG. 3 is a view taken in the direction of arrows III-III in FIG. 1;

FIG. 4 is a diagram showing a state where punching and bending are simultaneously performed by the press die of the first embodiment.

FIG. 5 is a diagram showing a state of a cutting process following bending by the press die of the first embodiment.

FIG. 6 is a perspective view showing an example of a plate material that has been simultaneously punched and bent.

FIG. 7 is a partial perspective view showing a punch according to a second embodiment of the present invention.

FIG. 8 is a perspective view showing another example of a plate material that has been simultaneously punched and bent.

FIG. 9 is a longitudinal sectional view of a simultaneous punching and bending press die according to a third embodiment of the present invention.

10 is a view on arrow XX in FIG. 9. FIG.

11 is a view taken in the direction of arrows XIII-XIII in FIG. 9;

FIG. 12 is a detailed view of a hypotenuse blade portion formed in the punch of the third embodiment.

FIG. 13 is a diagram showing a state of punching with a press die according to a third embodiment.

FIG. 14 is a diagram showing a state where punching and bending are simultaneously performed by the press die of the third embodiment.

FIG. 15 is a diagram showing a state of cutting processing subsequent to bending processing by the press die of the third embodiment.

FIG. 16 is a diagram illustrating bending of a plate material according to a conventional technique.

FIG. 17 is a diagram illustrating a processing limit of a bending height of a plate material according to a conventional technique.

FIG. 18 is a view showing basic dimensions of a press die for bending a plate material in the prior art.

FIG. 19 is a view showing burrs generated by cutting and bending a plate material according to a conventional technique.

[Explanation of symbols]

 Reference Signs List 1 plate material 2 punch 2A, 2C punch cutting blade 2B hypotenuse blade 3 die 3A, 3B die cutting blade 4,5 holding plate 6,7 spring 8 lower holder 9 upper holder 15 L-shaped blade 16 movable die 16A movable die cutting blade 17 spring

Claims (4)

(57) [Claims] 1. A punch and a die for cooperating the punching and bending of a plate material, a plate retainer provided on a side surface of the punch so as to be movable in an axial direction of the punch, and a hole in the die. In a simultaneous punching and bending press having a plate holder fitted and slidably provided in the axial direction of the hole, the punch includes:
And substantially perpendicular front end surface to the axis of said punch, the tip face
A part of the periphery is cut away and has a flat slope inclined backwards from the tip end surface, and a cutting edge formed on an outer edge formed by the tip end surface and the flat slope surface. die, the die holes having a shape corresponding to the contour of the punch as viewed in the axial direction, possess a cutting edge formed at the opening edge of the hole, and the punch and the die is the during processing Plate material
Between the flat slope of the punch and the plate when the
A gap is formed, and the tip of the die crosses the space.
Without bending simultaneous press type, characterized in that to have a obtain stroke. 2. A punch and a die which cooperate in punching and bending a plate material, a plate presser provided on a side surface of the punch so as to be movable in an axial direction of the punch, and a hole in the die. In a simultaneous punching and bending press having a plate holder fitted and slidably provided in the axial direction of the hole, the punch includes:
And substantially perpendicular front end surface to the axis of said punch, the tip face
A step surface formed by cutting out a part of the periphery and a step from the tip surface; and a cutting edge formed at the intersection of the tip surface and the step surface and the punch side surface. and, on the other hand, the die, the punch and die holes having a shape corresponding to the contour of the punch as viewed in the axial direction, possess a cutting edge formed at the opening edge of the hole, and during processing And the above
When the die clamps the plate, the step surface of the punch
A space is formed between the plate materials, and the tip of the die is
Punching bending simultaneously press die, characterized in that have a stroke end exceeds the space. 3. A punch and a die which cooperate in punching and bending a plate material, a plate presser provided on a side surface of the punch so as to be movable in an axial direction of the punch, and a hole in the die. In a simultaneous punching and bending press having a plate holder fitted and slidably provided in the axial direction of the hole, the punch includes:
A tip surface that is substantially perpendicular to the axis of the punch and that includes an outer straight side, and a flat slope formed by cutting a part of the straight side along the side; A cutting edge formed on the line of intersection between the tip surface and the side surface, a cutting edge formed on the line of intersection between the cutout portion and the side surface, and a line of intersection between the cutout portion and the tip surface. A hole having a cutting edge formed at an intersection line perpendicular to the side, wherein the die has a shape corresponding to an outer shape of the punch as viewed from an axial direction,
A cutting edge formed at an opening edge of the hole, and a plate retainer fitted into the hole of the die has a groove formed in an axial direction of the hole of the die at a position facing a flat inclined surface of the punch. A movable die having a slope corresponding to the flat slope of the punch and a cutting edge formed on the oblique side of the slope, and further including the movable die in the punch direction. The pressing means is provided for pressing, and the pan is pressed during processing.
When the die and the die sandwich the plate, the punch
A space is formed between the flat slope surface and the plate material surface, and
A simultaneous punching and bending press die, wherein the tip of the die has a stroke exceeding the space . 4. A punching and cooperating plate material punching and bending process.
The punch and die and the side of the punch in the axial direction of the punch.
Movable plate holder and fit in the hole of the die
And a plate holder slidably provided in the hole in the axial direction.
The punch is substantially perpendicular to the axis of the punch.
The front end surface and a part of the periphery of the front end surface are cut out,
The flat slope that recedes from the tip surface and inclines,
And a cutting edge formed on the outer edge formed by the flat slope
While the die is the pan seen from the axial direction.
Die hole having a shape corresponding to the outer contour of the die and the opening edge of the hole
Has a cutting edge formed on the
When the die clamps the plate, the flatness of the punch
A space is formed between the slope and the plate surface, and
Press having a stroke where the tip of the die exceeds the space
A die is used to cut the above-mentioned member to the outer edge of the punch tip surface.
And punching with the cutting edge of the die hole opening edge, the punch
Of the die and the tip end surface of the die.
The cutting edge of the outer edge of the flat slope of the punch and the opening of the die hole
Performing cutting work with the edge cutting blade in one stroke
A feature of simultaneous punching and bending.