JPH07232226A - Blank for transfer press and its production method - Google Patents

Abstract

PURPOSE:To simplify the structure of dies, and to reduce the manufacturing cost by forming small projections at the same position on either side of the upper and lower surfaces, and forming the other parts corresponding thereto to be flat. CONSTITUTION:A blank 7 to be worked by the transfer press is blanked out of a coiled material by a blanking machine. A number of the blank materials are laminated on a distouch device, and the blanks from the highest position is fed to the transfer press successively by a pick-up means. Small projections 14 are formed at the same position on either surface of the upper surface 7A and the lower surface 7B respectively. The other parts of the upper surface 7A and the lower surface 7B corresponding to the small projections 14 are formed flat, and a clearance S is provided between the upper and the lower blanks 7. This constitution prevents two blanks 7 from being closely attached to each other and fed to the transfer press.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blank material which is supplied from a destack apparatus to a transfer press machine and is subjected to transfer press processing, and a method for producing the blank material.

[0002]

BACKGROUND ART A blank material processed by a transfer press machine is produced by punching a coil material with a blanking press machine, and a large number of blank materials are stacked on a destacking device and picked up by a vacuum cup or the like. The blank materials are sequentially supplied to the transfer press machine from the highest order and processed. When a large number of blanks are stacked on the destack device, the rust preventive oil is applied to the surface of each blank, so the blanks are picked up from the top by the vacuum cup of the pickup means. Up and down 2
A situation occurs in which the blank materials come into close contact with each other, and these blank materials are directly supplied to the transfer press machine.

In order to solve such a problem, Japanese Patent Application Laid-Open No. 5-15932, in which the applicant of the present invention is a joint applicant, is for forming a protrusion on the upper die of a blanking press machine for punching a blank material from a coil material. A punch is provided, and when punching a blank material from a coil material, this punch forms a protrusion on the lower surface of each blank material that becomes a concave portion and protrudes like a convex portion on the lower surface, and a plurality of punches for forming a protrusion are provided. , These punches are divided into two groups and selectively movable up and down, and when one group of punches is descending and the other group of punches is ascending, one blank is punched, After this, raise the punch of one group,
The punch of the other set is lowered, and then the next blank material is punched, and such punching operation is repeated.

As a result, protrusions are formed on the respective blanks at different positions for each blank, and when a large number of blanks are stacked on the destacking device, the protrusions vertically Since there is a gap between the blank materials, the blank materials are prevented from sticking to each other with the above-mentioned rust preventive oil, and the positions of the protruding portions of the upper and lower blank materials are different. Of the blank material does not fit into the recess of the upper surface of the projection of the lower blank material. Therefore, when supplying each blank material to the transfer press machine by the vacuum cup of the pickup means, the upper and lower parts of It is possible to prevent the blank materials from being supplied in an overlapping manner.

[0005]

However, JP-A-5-1 is used.
The prior art of No. 5932 requires a mechanism for providing a plurality of protrusion forming punches in a die of a blanking press machine and selectively raising and lowering these punches in two groups. In this prior art, the die of the blanking press machine is provided with a cylinder and a cam driven by this cylinder, and a mechanism for raising and lowering the punch is constituted by these. For this reason, there has been a problem that the structure of the die of the blanking press machine becomes complicated and its manufacture becomes troublesome.

It is an object of the present invention to eliminate the need for providing a mechanism for raising and lowering a punch in a die of a blanking press machine, which simplifies the die structure and nevertheless causes a destacking device. The present invention provides a blank material for transfer press processing in which the upper and lower sheets do not overlap each other when supplied from a transfer press machine to a transfer press machine, and a method for producing the blank material.

[0007]

A blank material for transfer press processing according to the present invention is punched from a coil material by a blanking press machine, a large number of layers are stacked in a destacking device, and a transfer means is sequentially transferred from the topmost one. In the blank material supplied to the press machine,
Small projections are formed at the same location on either the upper surface or the lower surface of each, and the other location on the upper surface and the lower surface corresponding to the small projections is a flat surface.

In the above, the blank material may be a steel material obtained by cold rolling or hot rolling, or a non-magnetic material such as aluminum or aluminum alloy, and the material is arbitrary.

Further, the work of forming the small projections at the same position on either the upper surface or the lower surface of each blank material is performed by a punch provided in a die of a blanking press machine or a die of another press machine. Alternatively, for example, it may be performed with an electrode tip of a spot welding apparatus, and the work of forming the small protrusion is arbitrary.

Further, a method for producing a blank material for transfer press processing according to the present invention is a method for producing a blank material having the above-mentioned small protrusions, in which the coil material is intermittently fed at equal pitches. The press machine is provided with a small projection forming punch and a punching punch which are separated from each other in the coil material feeding direction. After the small projection forming punch forms small projections on the coil material, the coil fed by the above pitch The blank material is punched out from the material by a punching punch.

Further, in another method for producing a blank material for transfer press processing according to the present invention, a blanking press machine in which a coil material is intermittently fed at equal pitches is provided with a small projection forming punch and a punching punch. It is characterized in that it is provided at the same position in the material feeding direction, and at the same time that the small projection is formed on the coil material by the small projection forming punch, the blank material is punched from this coil material by the punching punch.

[0012]

In the present invention, in each blank material,
Small protrusions are formed on the same location on either the upper surface or the lower surface, and the other location on the upper surface and the lower surface corresponding to this small protrusion is a flat surface, so many blanks are stacked in the destacking device. In this case, the upper and lower blanks are separated from each other by the height of the small protrusions. Therefore, when the pick-up means sequentially supplies the uppermost blanks to the transfer press machine, the upper and lower blanks are protected. It is possible to prevent the oil from sticking to rust oil and being directly supplied to the transfer press machine.

Further, since the small projections provided on either the upper surface or the lower surface of the blank material are formed at the same position on all the blank materials, the punch for forming these small projections is formed by the metal of the blanking press machine. Even when it is provided in the die, it is not necessary to provide a mechanism for raising and lowering the punch in the die, and the simplification of the die structure can be achieved.

When a punch for forming small protrusions is provided on the die of the blanking press machine, the work of forming the small protrusions by the blanking press machine and the work of punching a blank material from the coil material are performed. Especially, when the small projection forming punch and the punching punch are provided at the same position in the coil material feeding direction, the small projection forming work and the punching work can be performed in one step.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram in which a part of the coil material feeding line for feeding the coil material 1 from the uncoiler 2 to the blanking press machine 3 is omitted. The coil material 1 is attached to the drum 2A of the uncoiler 2, and the coil material 1 is paid out by the rotation of the drum 2A. After the coil material 1 is passed through the leveler 4 to correct curl and the like, the coil material 1 is looped by a loop controller not shown in the drawing, and then passed through the feed roller 5 of the blanking press machine 3.
In the blanking press machine 3, the coil material 1 is fed by the feed roller 5 every time the ram 3A of the press machine 3 moves up and down once.
And the blank material 7 (see FIG. 5) is punched from the coil material 1 by the die 6 of the press machine 3.

FIG. 2 shows the mold 6. Mold 6 is ram 3A
It comprises an upper mold 8 and a lower mold 9 attached to the. Upper mold 8
Is a small projection forming punch 10 and a punching punch 11
And a pressing member 12, and the pressing member 12 has a punch 1
Holes 12A and 12B through which 0 and 11 can pass vertically are formed, and the pressing member 12 is constantly elastically urged downward by a spring 13.

As shown in FIG. 5, the small projection forming punch 10 is for forming the small projections 14 near the edge portion on the upper surface 7A of the blank material 7. In this embodiment, there are four small projections 14. There are four punches 10 in total because they are formed. As shown in FIG. 2, the upper surface 9A of the lower die 9 which is vertically opposed to each punch 10 is flat. These small projection forming punches 10 are arranged closer to the uncoiler 2 side than the punching punches 11, that is, on the front side in the feeding direction of the coil material 1.

As described above, the small projection forming punch 10 and the punching punch 11 are provided separately from each other in the feeding direction of the coil material 1, and there are a total of four small projection forming punches 10 and the punching punch 11. The interval is P, and this interval P is the same as the feed amount of the coil material 1 which is intermittently fed by an equal pitch every time the feed roller 5 vertically moves the ram 3A.

The coil material 1 is sent to the blanking press machine 3 at equal pitches P, and the coil material 1 is pressed by the pressing member 12 by the continuous vertical movement of the ram 3A while the small projection forming punch 10 is first used for the upper surface. A small protrusion 14 is formed on 7A. At this time, since the upper surface 9A of the lower mold 9 is a flat surface, the lower surface of the coil material 1 remains flat. Next, the portion of the coil material 1 on which the small protrusions 14 are formed is sent to the position of the punch 11 for punching, and punched by this punch 11, and the blank material 7 is produced from the coil material 1. In the blank material 7 thus produced, the small projections 14 are formed near the edge portion of the upper surface 7A and the lower surface is a flat surface, and the height of the small projections 14 is, for example, 0.
It is about 3 to 0.5 mm. Small projections 14 of all blanks 7 produced by the blanking press machine 3
The position of is the same because the small projection forming punch 10 is fixedly attached to the die 6 of the press machine 3.

The blank materials 7 thus produced in large numbers in the blanking press machine 3 are stacked on the destacking device 16 attached to the side of the transfer press machine 15, as shown in FIG. FIG. 4 shows the destack device 16
FIG. 4 is a partially enlarged cross-sectional view of the blank material 7 stacked in a large number, and as shown in the drawing, a gap S due to the small projections 14 exists between the blank materials 7 that are vertically stacked.

As shown in FIG. 3, a pickup means 1 provided with a vacuum cup 17 above the destack device 16.
8 is provided, and the vacuum cup 17 performs vertical movement and forward / backward movement (movement in the horizontal direction in FIG. 3). A plurality of other vacuum cups 19 are arranged between the transfer press machine 15 and the destack device 16, and these vacuum cups 19 also move up and down and move forward and backward. The vacuum cup 17 of the pickup means 18 descends, rises, moves forward,
By performing the backward movement, a large number of blank materials 7 stacked on the destacking device 16 become the top blank material 7.
While being sucked by the vacuum cup 17, the cradle 20
Transported on. When the vacuum cup 17 adsorbs the uppermost blank material 7 and moves up, there is a gap S between the uppermost blank material 7 and the blank material 7 below it due to the small projections 14 shown in FIG. , These blanks 7
Even if rust-preventive oil is applied to the surface of the blank material 7, the blank materials 7 do not adhere to each other, and therefore, the blank materials 7 are surely transferred one by one from the top blank material 7 onto the receiving table 20. The blank materials 7 are not overlapped and conveyed.

In the blank material 7 conveyed onto the receiving table 20, the respective vacuum cups 19 descend, rise, advance,
By performing the backward movement, the blank material 7 is transferred to the respective positions on the receiving table 20 and the next receiving table 21, and by the conveying movement of the feed bar 22 of the transfer press machine 15, the blank 7 is transferred to the transfer press machine 15. Will be sequentially sent to each processing stage of the mold 24 including the drawing mold 23, and sequentially molded into a predetermined shape.
Finally, edge cutting is performed along the chain double-dashed line B shown in FIG. As a result, a pressed product in which the portion where the small protrusion 14 is formed is removed is completed.

According to the present embodiment described above, as shown in FIG. 4, the small projections 14 are formed on the upper surface 7A of each blank 7 and the lower surface 7B is entirely flat. However, since the portion corresponding to the small protrusion 14 on the lower surface 7B is flat, when a large number of blank materials 7 are stacked on the destacking device 16, the rust preventive oil is applied to the surface of the blank material 7. However, since the blank materials 7 do not adhere to each other and the gap S due to the small projection 14 exists between the upper and lower blank materials 7, these blank materials 7 are removed from the destacking device 16 by the vacuum cup 17 of the pickup means 18. When the blank materials 7 are sequentially taken out, the two blank materials 7 do not overlap and are taken out, and the blank materials 7 are reliably sent one by one to the transfer press machine 15 side.

In particular, according to this embodiment, since the small protrusions 14 may be formed at the same position on the upper surface 7A of each blank 7, the small protrusion forming punch provided in the die 6 of the blanking press machine 3 is formed. Reference numeral 10 may be fixedly attached to the mold 6, and unlike the prior art Japanese Patent Laid-Open No. 5-15932, a plurality of small projection forming punches are divided into two groups and selectively raised.
Since it is not necessary to provide a lowering mechanism in the mold, the structure of the mold can be simplified and the mold manufacturing cost can be reduced.

Since the small projection forming punch 10 is provided in the blanking press machine 3 for punching the blank material 7 from the coil material 1, the work of forming the small projection 14 and the blank material 7 from the coil material 1 are punched. The work can be performed by the same press machine 3, and the number of required equipment machines can be reduced.

FIG. 6 shows another embodiment of the die of the blanking press machine. The die 36 includes an upper die 38 and a lower die 39. The upper die 38 has a small projection forming punch 40, a punching punch 41, and a holding member 42. The small projection forming punch 40 and the punching punch 41 are Since the small projection forming punch 40 is provided integrally with the punching punch 41 without being displaced in the feeding direction of the coil material 1, these punches 40, 41 are provided at the same position in the feeding direction of the coil material 1. Has been.

According to this embodiment, the small projection 14 is formed on the coil material 1 by the small projection forming punch 40, and at the same time, the blank material 7 is punched from the coil material 1 by the punching punch 41. Such processing is possible when the coil material 1 is a thick material. According to this embodiment, the small protrusion 14
And the punching of the blank material 7 from the coil material 1 can be performed in one step, and both punches 40 and 41 can be provided at the same position in the feeding direction of the coil 1. The width of the blanking press machine can be reduced accordingly.

FIG. 7 shows another embodiment of the blank material. A small protrusion 64 is formed on the upper surface 57A of the blank 57 of this embodiment, and a small protrusion 64 is formed on the lower surface 57B.
Are formed by, for example, embossing. The recess 65 is displaced from the position of the small protrusion 64, and the portion 66 of the lower surface 57B corresponding to the small protrusion 64 is a flat surface.

Also in this embodiment, when a large number of blank materials 57 are stacked on the destacking device 16, a gap S is formed by the small protrusions 64 between the upper and lower blank materials 57, so that the blank material 7 described above is The same effect as the case can be obtained.

In each of the embodiments described above, the small projections 14 and 64 are formed on the upper surfaces 7A and 57A of the blanks 7 and 57, but the small projections are formed on the lower surface of the blank and the upper surface corresponding to these small projections is formed. The point may be a flat surface.

In addition, the blanks 7, 57 have small projections 14,
Although the punches 10 and 40 for forming 64 are provided in the die of the blanking press machine, this punch may be provided in the die of a press machine other than the blanking press machine. Further, the small protrusions can be formed by other than the punch of the press machine, for example, by the pressing action of the electrode tip of the spot welding. In this case also, a plurality of small protrusion forming punches can be selected for the die of the blanking press machine. It is no longer necessary to provide a mechanism for raising and lowering.

[0032]

According to the present invention, a small projection is formed on either the upper surface or the lower surface of each blank material, and the other part of the upper surface and the lower surface corresponding to this small projection is a flat surface. Therefore, when a large number of blank materials are stacked on the destacking device and sequentially supplied to the transfer press machine from the topmost one by the pickup means, a gap due to small protrusions is formed between the upper and lower blank materials, Since it is possible to prevent the two blanks from being closely attached and supplied to the transfer press machine, and the small protrusions of each blank can be formed at the same position, the small protrusions are provided on the die of the blanking press machine. Two sets of small projection forming punches provided in the blanking press machine, including the case of forming with the small projection forming punch and the case of forming with other means. Selectively raised separately, mechanism for lowering it is not necessary to the provision in the mold, by itself, the structure of the mold can be simplified, it can be inexpensive manufacturing cost of the mold.

Further, according to the present invention, when the small projection forming punch is provided in the die of the blanking press machine,
The work of forming the small protrusions and the work of punching the blank material from the coil material can be performed by the same blanking press machine, and the workability is improved accordingly, and the required equipment machinery can be reduced. Further, when the small projection forming punch and the punching punch are provided at the same position in the coil material feeding direction in the die of the blanking press machine, the blank material is punched from the coil material at the same time when the small projection is formed. The work can be performed, and these works can be performed in one step, and the width of the blanking press machine can be reduced.

[Brief description of drawings]

FIG. 1 is a diagram showing a feeding line of a coil material supplied to a blanking press machine.

2 is a cross-sectional view showing a die of the blanking press machine shown in FIG.

FIG. 3 is a diagram showing a transfer press machine provided with a destack device.

FIG. 4 is a partially enlarged cross-sectional view of blank materials stacked in large numbers in the destacking device shown in FIG.

FIG. 5 is an overall perspective view showing a shape of a blank material processed by a transfer press machine.

FIG. 6 is a view similar to FIG. 2, showing another embodiment of the die of the blanking press machine.

FIG. 7 is a view similar to FIG. 4 showing another embodiment of the blank material.

[Explanation of symbols]

 1 Coil material 3 Blanking press machine 7,57 Blank material 10,40 Small projection forming punch 11,41 Punching punch 14,64 Small projection 15 Transfer press machine 16 Destacking device 17 Vacuum cup

Claims (3)

[Claims] 1. A blank material for transfer press processing, which is punched from a coil material by a blanking press machine, stacked in a de-stacking device in large numbers, and sequentially supplied to the transfer press machine from the topmost one by a pickup means. A small blank is formed at the same position on either one of the upper surface and the lower surface, and the other portion on the upper surface and the lower surface corresponding to this small projection is a flat surface. . 2. The method for producing a blank material for transfer press working according to claim 1, wherein the blanking press machine in which the coil material is intermittently fed at equal pitches is small in the coil material feeding direction. A protrusion forming punch and a punching punch are provided, and after the small protrusion is formed on the coil material by the small protrusion forming punch, the blank is punched from the coil material fed by the pitch. A method for producing a blank material for transfer press processing, which comprises punching a material. 3. The method for producing a blank material for transfer press processing according to claim 1, wherein the blanking press machine in which the coil material is intermittently fed at equal pitches has a small projection forming punch and a punching die. A punch and a punch are provided at the same position in the coil material feeding direction, and at the same time when the small projection is formed on the coil material by the small projection forming punch, the blank material is punched from the coil material by the punching punch. A method for producing a blank material for transfer press processing, which is characterized by: