JP2001191127A - Method and apparatus for banking - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily come off a product from a scrap after a product is blanked from a metal plate stock. SOLUTION: As a first process before a second process to blank a product 2 from a metal plate stock 1, a notch 5 is formed between the outer edge of the metal plate stock 1 and the outer edge plane line of the product 2. Thus, by forming the notch 5, after the product 2 is flanked from the metal plate stock 1, the scrap 8 of a third process side is made close to a free state on the basis of the product 2, a clearance is formed between the product 2 and the scrap 8, or the clearance is apt to be formed. As a result, in a third process of product coming off, the product 2 is easily come off from the scrap.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a die punching apparatus and a die punching method for punching a predetermined die from a metal material plate.

[0002]

2. Description of the Related Art When a predetermined type of product is punched from a metal material plate, a die punching device as shown in FIG. 13 is used.

[0003] First, as shown in the figure, when the die punching device is opened, the metal material plate 1 is placed on the lower product punching set 41A. Next, as shown in FIG. 14, the upper product punching set 31A is lowered to punch out the product 2 from the metal material plate 1. Then, as shown in FIG. 15, the upper product punching set 31A is moved up to open again. In the process of raising the upper product punching set 31A,
First, the stripper spring 47, which has been contracted, is about to expand, and the stripper 46 and scraps (unnecessary parts other than the product in the metal material plate) 8 on the stripper are pushed up, so that the cut surface on the scrap side and the cut surface on the product side are removed. Are brought into contact with each other and the product 2 is caught on the scrap 8. Further, when the product punching set 31A rises and the load is not applied to the product 2 from the knockout 32 of the product punching set 31A, the contracted ejector pin spring 44 tries to expand, and the ejector pin 4
3 and the product 2 and the product 2 on the ejector pin 43
The scrap 8 which is in contact with the upper part rises, and the product 2 separates from the upper surface of the lower die 42 of the lower product punching set 41A.

As shown in FIG. 16A, when the upper die 36 of the upper product punching set 31A descends to punch the product 2 from the metal material plate 1, first, the upper die 36 is pressed. A crack is formed at a position in contact with the edge 36p on the lower die punch side and a position in contact with the edge 42p on the upper die side of the lower die punch 42. Then, as the upper die 36 descends, these cracks spread and the metal material plate 1
Is punched out of the product 2. Generally, a clearance C exists between the upper die 36 and the lower punch 42. Therefore, a crack generated at a position in contact with the edge 36p on the lower die punch side of the upper die 36 and a crack generated at a position in contact with the edge 42p on the upper die side of the lower die 42 are: The position in the horizontal direction will shift. For this reason, the cut surface of the scrap 8 and the cut surface of the product 2
As shown in FIG. 4B, the upper die 36 is inclined with respect to the moving direction (vertical direction) of the upper die 36 and has an upper end inner diameter Dsu of the scrap 2.
Is larger than the lower end inner diameter Dsd of the scrap 2, and the upper end outer diameter Dpu of the product 2 is larger than the lower end outer diameter Dpd of the product 2.

As a result, after the product 2 is cut out from the metal material plate 1, the stripper 46 is opened in the process of being opened.
Rises and the scrap 8 is lifted, as shown in FIG.
As shown in (2), the product 2 fits into the scrap 8 as if the wedge fits.

[0006]

However, in the prior art described above, the product 2 fits into the scrap 8 in the process of opening the mold, and the product 2 is removed from the scrap 8.
However, there is a problem in that it takes time and effort to remove the product, and the productivity is not very good. Moreover, it is preferable to drop the punched product 2 downward from the viewpoint of automation, continuous productivity, etc., but the lower end inner diameter Dsd of the scrap 8 is
Because it is larger than pu, the product 2 cannot be dropped down from the scrap 8 and removed. For this reason, in the prior art, the worker himself manually removes the product 2 from the scrap 8.

The present invention has been made in view of such conventional problems, and an object of the present invention is to provide a die punching apparatus and a die punching method capable of easily removing a product from scrap and improving productivity. I do.

[0008]

According to a first aspect of the present invention, there is provided a die punching device having a shape corresponding to a shape of an inner portion of an outer edge of a die of a product, and one of the front and rear surfaces of a metal material plate. A first mold in contact with a surface, and a shape corresponding to a shape of an outer portion from an outer edge of the product mold, and contacting the other of the front and back surfaces of the metal material plate; By relative movement with respect to the second die punching the product from the metal material plate, in the step of punching the product by the second die relative to the first die relative to Or, in a step before punching the product, a cutting means for making a cut between the outer edge of the metal material plate and the outer edge of the product to remove the metal material plate in the outer portion from the outer edge of the product. It is characterized by having.

In another aspect of the present invention, there is provided a die cutting method for punching a product from a metal material plate, or in a process before punching the product, from an outer edge of the metal material plate to an outer edge of the product. And a cutting step of removing a metal material plate in an outer portion from an outer edge of the product by cutting a gap between them.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a die punching system according to the present invention will be described below with reference to FIGS.

[0011] As shown in FIG.
A plurality of products 2 of a predetermined type are punched from the metal material plate 1. The outer shape of the product 2 has a smooth curved surface shape. The product 2 has a plurality of bolt mounting holes 3 and a T-shaped component mounting hole 4.

[0012] As shown in FIG.
The apparatus includes a die punching device 10 and a conveyor 50 that conveys a product 2 punched from a metal material plate 1 by the die punching device 10 to a product accumulation place. The die punching device 10
An upper plate 13 that moves up and down, a lower plate 14,
A cutting die set 20 and a product cutting die set 30 are provided between the plates 13 and 14.

The cutting die set 20 is disposed upstream (left side in FIG. 2) of the product cutting set 30, which is the second step, as the first step of processing. In addition, the conveyor 50
As a third step, it is arranged downstream of the product punching device 30 (right side in FIG. 2).

As shown in FIG. 3, the notch set 20 has an upper notch set 21 attached to the upper plate 13 and a lower notch set 25 attached to the lower plate 14. ing. The upper notch type set 21 is a notch punch (notch male type) 23 for making a notch 5 between the outer edge of the metal material plate 1 and the outer edge of the product 2.
And a punch retainer 22 for supporting the metal material plate 1
And a urethane cushion 24 that suppresses the bouncing up. The pan retainer 22 is fixed to the upper plate 13, and the urethane cushion 24 is fixed to the lower surface of the punch retainer 22. Lower cut type set 25
Is the die spacer 2 fixed to the lower mold plate 14.
6, a die retainer 28 fixed on the die spacer 26, and a cut bond die (cut female type) 27 for supporting the vicinity of the outer edge of the planned cut position. The cut bond die 27 is held by a die retainer 28 fixed on the die spacer 26. In the die spacer 26, a chip discharge hole 26a for discharging a chip generated by cutting into the metal material plate 1 is formed.

The cutting 5 by the cutting type set 20
As shown in FIG. 1 and FIG. 2, the distance between the outer edge of the metal material plate 1 and the outer edge of the product 2 is shortest. In addition, the position of the cut 5 may be basically any position as long as the cut 5 is formed between the outer edge of the metal material plate 1 and the expected line of the outer edge of the product.
As in the present embodiment, between the outer edge of the metal material plate 1 and the expected product outer edge line, a portion where the distance between the two is the shortest is preferable.

The product punching set 30 has an upper product punching set 31 attached to the upper die plate 13 and a lower product punching set 41 attached to the lower die plate 14 as shown in FIG. ing. FIG.
FIG. 4 is a sectional view taken along the line IV-IV in FIG. 2 of the product punching set 30.

The upper product removal set 31 includes the upper plate 1
3 and an upper and lower guide pin 15 fixed to the upper die holder 38.
A knockout 32 in contact with the metal material plate 1 on the inner side from the expected product outer edge line; a knockout spring 33 for urging the knockout 32 downward; and a mounting hole punch for punching a bolt mounting hole or a component mounting hole in the product. 34, a punch retainer 35 for holding the mounting hole punch 34 and the knockout spring 33, and an upper die (second die) 36 that comes into contact with the metal material plate 1 outside the expected product outer edge line.
And a spring killer pin 37 for maintaining the thickness of the product. The upper die 36 and the punch retainer 35 are fixed to an upper die holder 38. The knockout spring 33 has one end attached to the upper die holder 38 and the other end attached to the knockout 32. Therefore, knockout 32 can move up and down relatively with respect to upper die holder 38. The spring killer pin 37 is fixed to the end of the lower end surface of the upper die 36.

The lower product removing set 41 includes the lower die plate 1.
4, a guide bush 16 fixed to the lower die holder 48 and supporting the guide pin 15, and a lower die punch (first (A single mold) 42, a stripper 46 that contacts the metal material plate 1 outside the expected product outer edge position,
It has a stripper spring 47 for urging the stripper 46 upward, an eject pin 43 for separating the product from the lower die punch 42, and an eject spring 44 for urging the eject pin 43 upward. The lower die punch 42 has a through hole a through which the mounting hole punch 34 of the upper product removing set 31 penetrates. The through hole 42a is used as a chip discharge hole for discharging the chip extracted from the metal material plate 1 by the mounting hole punch 34. Also, an eject pin 43 is provided in the lower punch 42.
And an eject pin spring 44.
The eject pin 43 includes an eject pin spring 44.
The tip (upper end) of the lower punch 4
2 can protrude upward from the upper surface. One end of the stripper spring 47 has a lower mold holder 4.
8 and the other end is attached to a stripper 46. For this reason, the stripper 46 can move up and down relatively to the lower die holder 48.

The upper product removing set 31 has an embossing punch (bending means) 39 as shown in FIG. FIG. 11 is a cross-sectional view of the product removal set 30 taken along the line XI-XI in FIG. The embossed punch 39
A part of the upper die 36 of the upper product removal set 31 is cut out and embedded therein. This embossed punch 39
As shown in FIG. 1, a triangular bent portion 7 having the bottom of the expected product outer edge line is formed in a portion of the scrap 8 outside the expected product outer edge line.

The lower product removing set 41 has a rolling punch (rolling means) 49 as shown in FIG. FIG. 12 is a cross-sectional view of XII in FIG.
FIG. 2 is a sectional view taken along line XII. In this rolling punch 49, a part of the stripper 46 of the underproduct removal set 41 is cut out,
It is fixed to the lower die holder 48 so that it can be seen from the outside. The level of the upper surface of the rolling punch 49 is
At the time point when 6 is lowered most, the distance between the upper surface of the rolling punch 49 and the lower surface of the upper die 36 is at a level where the distance is somewhat shorter than the thickness of the metal material plate 1. The spring killer pin 37 of the upper product removal set 31 is
At the time when the uppermost die is lowered, the distance between the upper surface of the rolling punch 49 and the lower surface of the upper die 36 and the distance between the upper surface of the stripper 46 and the lower surface of the upper die 36 are provided to maintain the desired distance. I have.

As shown in FIGS. 1 and 2, the rolling point by the rolling punch 49 is between the outer edge of the metal material plate 1 and the outer edge of the product, and is substantially symmetric with the cut 5 around the product. is there.

Next, the operation of the die punching system according to this embodiment will be described.

As shown in FIG. 2, when the metal material plate 1 reaches the cutting die set 20, which is the first step, the upper die plate 13 is lowered as shown in FIG.
The cut 5 is made between the product outer edge expected line and the outer edge of the metal material plate 1 by the cut punch 23 of the upper cut type set 21 attached to the upper cut type set 21. The chips generated at the cut 5 are removed by the die spacer 26 of the lower cut type set 25.
Is discharged from the chip discharge hole 26a formed in the hole.

As shown in FIG. 2, when the cut portion 5 of the metal material plate 1 reaches the product punching set 30, which is the second step, the product punching set 30 moves from the open state shown in FIG. Then, the upper mold plate 13 starts to descend, and the state shown in FIG. In the process from the state of FIG. 4 to the state of FIG. 5, first, the knockout 32 of the upper product punching set 31 comes into contact with the metal material plate 1 and the metal material plate 1 floating from the lower die punch 42 by the ejector pins 43.
Press down. In the process of being pushed down, the metal material plate 1 comes into contact with the stripper 46 of the undercut punching set 41 and pushes down the stripper 46 so that the upper surface of the stripper 46 matches the level of the upper surface of the lower die punch 42. That is, at this time, the metal material plate 1 comes into contact with both the stripper 46 of the lower product punching set 41 and the lower die punch 42, and the knockout of the upper product punching set 31 which has pressed down the metal material plate 1 is performed. 32 is located at the lowest point and cannot be lowered any further. The upper die holder 38 is
Thereafter, the upper die 36 and the mounting hole punch 34 also descend and the upper die 36 and the mounting hole punch 34 also descend and come into contact with the metal material plate 1. It should be noted that the knockout 32 of the upper die punching set 31 does not lower than the lowermost point position described above, even if the upper die holder 38 lowers, only the knockout spring 33 contracts.

The upper die holder 38 is further lowered from the state shown in FIG. 5, and reaches the lowermost position as shown in FIG. In this process, the upper die (second die) 36 and the mounting hole punch 34 descend with respect to the lower die punch (first die) 42, and the scrap 8 is punched from the metal material plate 1, in other words, Then, the product 2 is punched from the metal material plate 1. Chips generated by the punching of the mounting hole punch 34 are discharged to the outside from the chip discharge holes 42 a of the lower die punch 42, and the product 2
The scrap 8 on the outer peripheral side pushes down the stripper 46 as the upper die 36 descends.

When the upper die holder 38 is further lowered from the state shown in FIG. 5, the embossed punch (folding) accompanying the lowering of the upper die holder 38 as shown in FIG. By the lowering of the bending means 39, a triangular bent portion 7 having a bottom line at the product outer edge expected line is formed at the scrap 8 portion. Further, XII in FIG.
At the position of the section along the line XII, a portion of the scrap 8 which is substantially symmetrical with the cut 5 is rolled by being sandwiched between the upper die 36 and the rolling punch (rolling means) 49.

In the lower dead center state of the upper die holder 38 shown in FIGS. 6, 11 and 12, as shown in FIG. 1 (part of the second step), the product 2 is punched from the metal material plate 1, The bolt mounting holes 3 and the component mounting holes 4 in 2 are also punched. A cut 5, a rolled portion 6, and bent portions 7, 7 are formed in the portion of the scrap 8. In addition, since the upper die plate 13 is provided with the upper cutting die set 21 in addition to the upper product punching set 31, as the upper die plate 13 descends, the upper product punching set 31 also becomes the upper cutting die set. Since the product 21 also descends at the same time, when the product 2 is punched by the product punching set 30 in the second step, the cut 5 is formed by the cutting die set 20 in the first step on the upstream side.

In the present embodiment, the notch 5 is formed in the portion of the scrap 8 on one side and the rolled portion 6 is formed in the portion of the scrap 8 on the other side around the product 2.
The scrap 8 on the third step side with respect to the product 2 escapes to the third step side and is slightly separated from the product 2.

When the upper die holder 38 shown in FIG. 6 reaches the bottom dead center state, as shown in FIG. 7, the upper die holder 38 starts to rise, and accordingly, the upper die 36 and the mounting hole punch 34 also move. Start to rise. However, the knockout 32 does not rise at this stage, only the contracted knockout spring 33 expands. When the upper die 36 starts to rise, the stripper spring 47 which has been contracted starts to elongate, and starts to lift the stripper 46 and the scrap 8.

Then, the stripper 46 reaches the top dead center as shown in FIG. In the period from the bottom dead center state of the upper die holder 38 to the top dead center of the stripper, the knockout 32
As described above, the knockout 32 does not rise, and the product 2 remains in contact with the upper surface of the lower punch 42. At the top dead center of the stripper, the scrap 8 is located above the product 2. In the related art, as described with reference to FIG. 16, since the lower end inner diameter Dsd of the scrap 8 is larger than the upper end outer diameter Dpu of the product 2, the scrap 8 is not positioned above the product 2. However, in the present embodiment, the notch 5 and the rolled portion 6 are formed in the scrap 8 to form a gap between the scrap 8 and the product 2, so that the scrap 8 is pushed up by the rise of the stripper 46. Thus, the scrap 8 rises independently and is positioned above the product 2 without the scrap 8 lifting the product 2 as in the related art.

When the upper die holder 38 is further raised, the upper die 36 is separated from the scrap 8 as shown in FIG. 9, and then the contracted knockout spring 33 is returned to its original length (length when opened). Back to In this process, since the load applied to the product 2 from the knockout 32 disappears, the ejector pin spring 44 that has contracted tends to expand, and the ejector pin 43 and the product 2 are lifted.
The product 2 separates from the lower punch 42.

The upper die holder 38 is further raised, and
The open state shown in FIG. It should be noted here that in the open state in the conventional technique shown in FIG. 15, the product 2 is located above the scrap 2, whereas in the present embodiment, the product 2 is It is located below.

As described above, in this embodiment, since the product 2 is located below the scrap 8, when the metal material plate 1 is moved and the product 2 is moved to the conveyor 50 which is the third step, 2 falls naturally and rests on the conveyor 50. The product 2 placed on the conveyor 50 is transported by the conveyor 50 to a product accumulation location.

In the present embodiment, since the product 2 is located below the scrap 8 and a gap is formed between the product 2 and the scrap 8, the product 2 is moved from the second step to the third step. In the process of moving to the process, the product 2 completely disengages from the scrap 8 and enters under the scrap 8,
There is a possibility that only the scrap 8 will be transported without the product 2 being transported. For this reason, in this embodiment, as shown in FIGS. 1 and 10, a bent portion 7 is formed on the upstream side in the transport direction of the metal material plate 1 with respect to the product 2, and the product 2 is placed under the scrap 8. I try not to get in.

As described above, in the present embodiment, the product 2 can be detached from the scrap 8 very easily, so that the product 2 is manually removed from the scrap 8 without bothering the operator. The productivity can be greatly improved as compared with.

In the above embodiment, the scrap 8
Although the rolled portion 6 was formed in addition to the notch 5, the scrap 2 in the third step is substantially free even with the notch 5, so that the product 2 can be easily removed from the scrap 8. In the present embodiment, the bent portion 7 is
However, when the thickness of the metal material plate 1 is relatively large, the bent portion 7 is not formed because the product 2 does not enter under the scrap 8 even without the bent portion 7. You may.

In this embodiment, the cut 5 is formed in the metal material plate 1 in the first step, but the cut 5 may be formed simultaneously in the second step of punching the product 2. In this case, a notch punch as a notch male die is provided in the upper die 36, and a notch female die is formed in the lower die punch 42. However, when the lower die punch 42 is provided in the upper product punching set and the upper die 36 is provided in the lower product punching set, the positions of the male and female female cuts are reversed. Further, in the present embodiment, the rolling portion 6 is formed at the same time in the second step of punching the product 2, but since the rolling portion 6 is for actively separating the product 2 and the scrap 8, the product 2 is After the punching and before the third step of removing the product, the rolled portion 6 may be formed.

[0038]

According to the present invention, since a cut is made in a portion to be scrap, the product can be easily detached from the scrap very easily, and the productivity of the product can be greatly enhanced.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a processing state on a metal material plate in each step in an embodiment according to the present invention.

FIG. 2 is a plan view of a die cutting system according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view (a cross-sectional view taken along line III-III in FIG. 2) of the cut-type set according to the embodiment of the present invention;

4 is a cross-sectional view (a cross-sectional view taken along line IV-IV in FIG. 2; 1) of a product punching set according to an embodiment of the present invention.

FIG. 5 is a cross-sectional view (part 2) of a product punching set according to an embodiment of the present invention.

FIG. 6 is a sectional view (part 3) of a product punching set according to an embodiment of the present invention.

FIG. 7 is a sectional view (No. 4) of a product punching set according to an embodiment of the present invention.

FIG. 8 is a sectional view (part 5) of a product punching set according to an embodiment of the present invention.

FIG. 9 is a sectional view (part 6) of a product punching set according to an embodiment of the present invention.

FIG. 10 is a sectional view (part 7) of a product punching set according to an embodiment of the present invention.

FIG. 11 is a cross-sectional view taken along the line XI-XI of FIG. 2 of the product punching set according to the embodiment of the present invention.

FIG. 12 is a sectional view taken along line XII-XII in FIG. 2 of the product punching set according to the embodiment of the present invention.

FIG. 13 is a cross-sectional view of a conventional product punching set (part 1).
It is.

FIG. 14 is a sectional view of a conventional product punching set (part 2).
It is.

FIG. 15 is a sectional view of a conventional product punching set (part 3).
It is.

FIG. 16 is an explanatory diagram showing the principle of punching a product.

[Explanation of symbols]

1 ... metal material plate, 2 ... product, 5 ... cut, 6 ... rolled part,
7 ... bending part, 10 ... die punching device, 20 ... cut type set, 21 ... top cut type set, 23 ... cut punch,
25 ... lower cut type set, 27 ... cut bondi, 30
... Product punching set, 31 ... Upper product punching set, 32
... knockout, 36 ... upper die, 39 ... emboss punch, 41 ... lower product punching set, 42 ... lower punch, 4
6 ... stripper, 49 ... rolling punch, 50 ... conveyor.

Claims (8)

[Claims] 1. A die punching apparatus for punching a product of a predetermined type from a metal material plate, wherein the product has a shape corresponding to the shape of an inner portion of an outer edge of a die of the product, and A first mold in contact with one surface of the metal material plate, a shape corresponding to a shape of an outer portion from an outer edge of the mold of the product, and contacting the other surface of the front and back surfaces of the metal material plate; A second mold that punches the product from the metal material plate by moving relative to one mold; and a second mold that moves relative to the first mold to strike the product. In the step of punching, or in the step before punching the product,
Cutting means for making a cut between the outer edge of the metal material plate and the outer edge of the product to remove the metal material plate in the outer portion from the outer edge of the product. 2. The die-cutting device according to claim 1, wherein the cutting means moves relative to each other in a process before punching the product to form a cut male mold and a cut female mold for making the cut. A die punching device, comprising: 3. The die punching device according to claim 1, wherein said cutting means is attached to one of said first die and said second die, and is provided with a male die for making said cut. A notch female mold formed in the other of the first mold and the second mold and cooperating with the notch male mold to cut the notch; A step of making a cut in the step of punching the product by relative movement of a second die. 4. The die punching device according to claim 1, wherein the second die moves relative to the first die to punch the product, or In a step after the punching of the product, rolling means for rolling a portion between the outer edge of the metal material plate and the outer edge of the product and substantially symmetric with the cut portion around the product is provided. A die punching device. 5. The die punching device according to claim 1, wherein the metal material plate is moved along an outer edge of the product and on an upstream side in a moving direction with respect to the product. A die punching device, comprising: bending means for bending a part of the position downward. 6. A die punching method for punching a product of a predetermined type from a metal material plate, wherein the metal material plate is punched in the step of punching the product from the metal material plate or in a step before punching the product. A cutting step of making a cut between the outer edge of the product and the outer edge of the product to remove a metal material plate in an outer portion from the outer edge of the product. 7. The die punching method according to claim 6, wherein in the step of punching the product from the metal material plate or in the step after punching the product, the product is cut from the outer edge of the metal material plate. And a rolling step of rolling a portion that is substantially symmetrical to the cut portion with the product as a center, between the outer edges of the die. 8. The method according to claim 6, wherein, when the metal material plate is moved, the metal material plate is moved along an outer edge of the product and on the upstream side in the moving direction with respect to the product. A die punching method, comprising a bending step of bending a part of the position downward.