JP2001353540A - Closely attaching and folding device of three- dimensional metal plate and the three-dimensional metal plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a closely attaching and folding device of a three- dimensional metal plate which can easily fold a folding side provided on an end of the three-dimensional metal plate having a predetermined roundness in one stroke of a press. SOLUTION: A fixed punch for preventing the movement of the folding side 19 in a folding operation is provided. A preliminary folding part 14 for temporarily folding the folding side 19 by a predetermined angle in advance is formed on a folding punch 13. A closely attaching and folding part 15 for closely attaching the temporarily folded folding side 19 by the preliminary folding part 14 to the metal plate 18 is formed on the folding punch 13. The folding side 19 folded substantially at a right angle around the metal plate 18 which is worked in a three-dimensional shape is folded by the folding punch 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bent side formed at a substantially right angle around a metal plate processed into a three-dimensional shape.
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contact bending device that bends and adheres with a bending punch.

[0002]

2. Description of the Related Art A vehicle or the like is formed into a shape such as a door or a bonnet by processing a metal plate having a predetermined thickness. Such a vehicle door, bonnet, etc. are formed into a three-dimensional three-dimensional shape with a predetermined roundness after a metal plate of a predetermined thickness is cut into a door or a bonnet shape by a press, and then pressed. Is molded. The ends of the doors, bonnets and the like cut by the press, which are cut surfaces, had sharp edges, and there was a risk of injury.

[0003] The peripheral ends of a door, a bonnet and the like made of a metal plate are bent to form a double structure. This prevents injuries at the ends and increases the strength so that doors, bonnets and the like are not easily deformed by bending the ends to form a double structure.

On the other hand, FIG. 9 is a partially longitudinal side view of a door (metal plate 118) provided with a bent side 119 provided around a slanted or rounded three-dimensional three-dimensional metal plate 118. Is shown. First, a metal plate 1 having a predetermined thickness is set.
Although not shown, 18 is cut into a predetermined shape such as a door or a bonnet by a press. Then, the metal plate 118
The main body 118A is formed into a three-dimensional three-dimensional shape having a predetermined inclination or roundness by a press, and a bent side 119 having a predetermined width is provided at a peripheral edge of the main body 118A. When the metal plate 118 is formed into a three-dimensional shape by pressing, the bent side 119 is bent at a substantially right angle to the metal plate 118 body 118A side in advance.

[0005] An apparatus (not shown) for bending the metal plate 118 to bend the bending side 119 is attached to a press, and the metal plate 1 is placed at a predetermined position on the lower die of the apparatus for bending the metal plate 118.
18 is placed. Then, after the main body 118A of the metal plate 118 is fixed by a movable pad (not shown) provided on the close-contact bending device for the metal plate 118, it is provided on a link cam mechanism (not shown) provided on the side of the close-contact bending device on the metal plate 118. The preliminarily bent punch is operated, and the bent side 119 is preliminarily bent to the double bending side (the main body 118A side) by about 45 degrees. (119A in the figure).

When there are a plurality of bent sides 119 around the metal plate 118, a link cam mechanism is provided corresponding to each side, and each bent side 119 is preliminarily bent about 45 degrees toward the main body 118A. Had been processed. Then, the bent side 119 preliminarily bent by about 45 degrees was tightly bent to the main body 118A by lowering the upper die (bending punch) of the metal sheet 118 for the close bending apparatus. Incidentally, reference numeral 120 denotes a reinforcing metal plate.

[0007]

However, in the case where a bent side formed in advance at a substantially right angle around a three-dimensionally shaped metal plate is bent and closely bent to the main body, the metal plate is closely bent. The main body side is preliminarily bent by about 45 degrees by the preparatory bending punch of the link cam mechanism provided in the bending device, and then, the bending punch is lowered to perform close contact bending on the metal plate main body. For this reason, there has been a problem that the cost of the metal sheet bending apparatus is greatly increased.

In addition, the bent side around the metal plate is preliminarily bent by the preparatory bending punch provided in the link cam mechanism.
The preliminary bending punch of the link cam mechanism has a structure larger than the bending side due to the structure of the link cam mechanism.
In this case, the bending punch of the press must be set to a large stroke enough to allow the preliminary bending punch of the link cam mechanism to be larger than the bending side. For this reason, there is a problem that the vertical movement of the bending punch of the press becomes large, and it takes much time to bend the bent side, and it is not possible to increase the number of bending processes on the bent side of the metal plate.

SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the prior art, and has a bent three-dimensional metal plate having a predetermined roundness. An object of the present invention is to provide a three-dimensionally shaped metal plate close-contact bending apparatus that can easily perform a tune with one stroke of a press.

[0010]

According to a first aspect of the present invention, there is provided an apparatus for tightly bending a three-dimensionally shaped metal plate, wherein the bent portion is formed at substantially right angles around the three-dimensionally shaped metal plate. The side,
A contact folding device that bends and adheres with a folding punch, and is formed on a movable pad that prevents movement of a folding side during bending and a folding punch, and temporarily folds a folding side in advance by a predetermined angle. It is provided with a preliminary bending portion for bending, and a contact bending portion formed on the bending punch, and for tightly bonding a bending side previously provisionally bent at the preliminary bending portion to the metal plate. is there.

[0011] In addition to the above, the close bending device for a three-dimensionally shaped metal plate according to the second aspect of the present invention is such that the preliminary bending portion is formed in an arc shape.

Further, in the device for tightly folding a three-dimensionally shaped metal plate according to a third aspect, in addition to the first or second aspect, a preliminary bent portion is provided corresponding to the periphery of the metal plate.

According to a fourth aspect of the present invention, there is provided a three-dimensionally shaped metal plate having a bent side bent substantially at right angles around a main body. The portion is bent so as to be in close contact with the main body, and a space is formed between the base of the bent side and the main body.

[0014]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a three-dimensional metal plate 18 of the present invention.
FIG. 2 is a perspective view of the three-dimensionally shaped metal plate 18 of the present invention bent by the three-dimensionally shaped metal plate 18 of the present invention, and FIG. The longitudinal side view of the three-dimensional metal plate 18 is shown.

A three-dimensionally shaped metal plate 18 close bending device 10
Is an upper mold 11 and a lower mold 1 attached to a press (not shown).
The upper surface 17A of the lower mold 17 is configured such that a metal plate 18 such as a door of a vehicle, a hood or the like (hereinafter, the metal plate 18 is described as a door) can be placed thereon. The metal plate 18 is formed in a three-dimensional three-dimensional shape with a predetermined inclination or roundness, and the upper surface 17A of the lower mold 17 is formed in the three-dimensional metal plate 18.
It has a three-dimensional shape on which one side surface can be placed.

The upper die 11 is composed of a movable pad 12 and a bending punch 13, and the bending punch 13 is attached to a predetermined position around the movable pad 12. The lower surface 12A of the movable pad 12 is provided to face the upper surface 17A of the lower mold 17, and the lower surface 12A of the movable pad 12 is
Are formed in substantially the same three-dimensional shape as the opposing surface (upper surface 17A). That is, the lower surface 12A of the movable pad 12 is formed in a three-dimensional shape that is in close contact with the lower die 17 that is formed in a three-dimensional shape equivalent to the metal plate 18, and the three-dimensional shape placed on the upper surface 17A of the lower die 17 is formed. The upper surface 1 of the lower die 17 without deformation of the metal plate 18
It is configured so that it can be pressed and fixed to 7A.

Here, two edges of the left edge portion 18B and the lower edge portion 18C of the vehicle door as the metal plate 18 (in this case, a plurality of edges may be provided only on the left edge portion 18B or around it. The following description will be made only with respect to the two edges). When the left edge 18B and the lower edge 18C of the metal plate 18 are bent to form a double structure, first, the metal plate 18 having a predetermined thickness is cut into a door having a predetermined shape by a press. The metal plate 18 is press-formed into a predetermined rounded three-dimensional shape by a press, and the left edge 18B and the lower edge 18C are double-folded (upper side in FIG. 1). Are bent at substantially right angles to form each bent side 19.

The left edge 18B and the lower edge 18C of the metal plate 18
Is formed between them, and the corner edge 18D is formed.
Is bent toward the main body 18A, the end 19B of the bent side 19 located on the center side of the main body 18A is separated from the end 19B of the bent side 19 bent from the left edge 18B and the lower edge 18C. The bent edge 19 overlaps with the end 19B of the bent side 19, and distortion occurs at the corner 18D. For this reason, in the present invention, the base 19A of the corner portion 18D of the metal plate 18 is used.
And the size of the end 19B is shorter than the size of the base 19A and the end 19B of the left edge 18B (including the lower edge 18C). Thereby, when the bent side 19 of the corner portion 18D located at the left edge portion 18B and the lower edge portion 18C is bent toward the main body 18A, the two bent sides 19, 19 are doubled to form a square edge. Part 1
8D is prevented from being distorted.

The bent punch 13 is formed by bending the bent sides 19, 19 formed by bending the right and left edges 18B and 18C of the metal plate 18 at substantially right angles with the bent punch 13. 18A
The bending punch 13 is attached to the preliminary bending portion 1
4 and a tightly bent portion 15. The contact bent portion 15 is provided adjacent to the movable pad 12, and the contact bent portion 15 is formed in the same three-dimensional shape as the metal plate 18 like the lower die 17, and is placed on the upper surface 17 </ b> A of the lower die 17. The bent side 19 around the three-dimensional metal plate 18 is pressed against the lower mold 17 without deformation and can be bent.

Further, the preliminary bending portion 14 is provided on the opposite side of the movable pad 12 continuously to the close bending portion 15. The preliminary bending portion 14 is formed in an elliptical shape having a substantially arc-shaped cross section, and is formed apart from the close bending portion 15 with respect to the lower mold 17. One side of the preliminary bending portion 14 is separated from the lower mold 17 as the distance from the close bending portion 15 is increased, and is formed in a substantially circular arc shape while the other side is extended downward (toward the lower mold 17) by a predetermined distance. There is formed a side wall 14A that contacts the side surface of the lower mold 17.

That is, the close bending portion 15 of the bending punch 13 is configured to be in close contact with the upper surface 17A of the lower die 17, and the preliminary bending portion 14 is separated from the upper surface 17A of the lower die 17 to be substantially circular. It is formed in an arc shape. As a result, the tightly bent portion 15 connects the end 19A of the bent side 19 with the main body 18A.
To be able to adhere to the
Is formed such that a substantially elliptical space 19C can be formed at the base 19A of the bent side 19.

The preliminary bent portion 14 is provided corresponding to the left edge portion 18B and the lower edge portion 18C provided around the metal plate 18, and is provided between the left edge portion 18B and the lower edge portion 18C. A bent portion 16 is provided (FIG. 6). The corner preliminary bent portion 16 is formed in an oval shape which is shallower than the preliminary bent portion 14. That is, the corner pre-bending portion 16 of the metal plate 18 is
The arc-shaped space formed between the base portion 19A and the main body 18A can be formed by the small small space portion 19D.

Reference numeral 14B denotes an inclined portion, which is separated from the side surface of the lower mold 17 as going downward, and the inclined portion 14B is
Is configured to be able to guide the folding side 19 to the preliminary bending portion 14 even when the opening is wider than a right angle. Although not shown, the movable pad 12 is provided with an urging member.
The movable pad 12 is urged by the urging member toward the lower mold 17, and when the upper mold 11 is lowered toward the lower mold 17, the metal plate 18 is moved before the inclined portion 14 </ b> B contacts the bent side 19. It is configured so that it can be fixed to the lower mold 17 at 12.

Next, the operation of the apparatus 10 for bending the three-dimensionally shaped metal plate 18 will be described. First, a metal plate 18 configured in a three-dimensional shape is placed at a predetermined position on the upper surface 17A of the lower mold 17, and a three-dimensional reinforcing metal plate 20 of a predetermined thickness and a predetermined size (in this case, , Reinforcing metal plate 20
Is smaller than the metal plate 18). Next, when a switch (not shown) for operating the press is pressed, the upper mold 11 is pressed.
Moves downward (to the lower mold 17 side), and the movable pad 12 contacts the three-dimensional metal plate 18 and the three-dimensional reinforcing metal plate 20 placed on the upper surface 17A of the lower mold 17. And
When the upper mold 11 is further lowered, the movable pad 12 is pressed against the lower mold 17 by the urging force of the urging member, and the metal plate 18 and the reinforcing metal plate 20 are fixed to the upper surface 17A of the lower mold 17 by the movable pad 12.

The metal plate 18 and the three-dimensional reinforcing metal plate 2
0 is fixed to the upper surface 17A of the lower mold 17 by the movable pad 12, and when the upper mold 11 further descends, the side wall 14A descends while substantially contacting the side surface of the lower mold 17, and the end 19B of the bent side 19 Contacts the preliminary bending portion 14 of the bending punch 13 via the movable pad 12 side of the inclined portion 14B. Further, as the bending punch 13 descends, the end 19B of the bent side 19 abutting on the preliminary bent portion 14 is deformed into an arc along the preliminary bent portion 14 (FIG. 4). . And further bending punch 1
3 descends, the end 19B of the bent side 19 extends from the inside of the preliminary bent part 14 to the close bent part 15, and then the bent side 1
9 is bent at the contact bending portion 15 to form a main body 18A.
(FIG. 5). At this time, the end 19 of the bent side 19
B is separated from the movable pad 12 by a predetermined distance without contacting the movable pad 12.

That is, when the upper mold 11 descends, the metal plate 18
Further, the reinforcing metal plate 20 is fixed to the lower mold 17 by the movable pad 12, and the upper mold 11 is further lowered, and the bent side 19 is preliminarily bent to the main body 18 </ b> A side by the preliminary bending portion 14 of the bending punch 13. After that, the end portion 19B of the bent side 19 is brought into close contact with the main body 18A at the contact bent portion 15. Thus, the end 19B of the bent side 19 around the metal plate 18 is bent and adheres to the main body 18A, and the preliminary bent portion 14 forms a substantially elliptical space between the base 19A of the bent side 19 and the main body 18A. A portion 19C is formed. When the bent side 19 is bent, the bent side 19 is bent at the boundary between the preliminary bent portion 14 provided on the bending punch 13 and the tightly bent portion 15 between the space 19C and the tightly bent portion. Trace 1
9E is attached.

The corner 18D of the metal plate 18 has a substantially elliptical space 19D formed between the base 19A of the bent side 19 and the main body 18A. The bent side 19 of the bent edge 18D of the metal plate 18 is in close contact with the main body 18A, and a small space 19D having a substantially elliptical shape is provided between the base 19A of the bent side 19 of the corner edge 18D and the main body 18A. Is formed (FIG. 6). The folding punch 13 has a tightly bent portion 15 which is continuous with the preliminary bent portion 14.
Is provided, so that the folded side 19 is
Space 19C provided between the base 19A and the main body 18A
Although not shown, a fold curve is formed between the end portion 19B and the end portion 19B, and it is possible to easily visually recognize that the bending is performed by the close-contact bending device 10 of the present invention (FIGS. 7 and 8).

As described above, by forming the preliminary bending portion 14 of the bending punch 13 into an arc shape, the bending side 19 of the metal plate 18 fixed by the movable pad 12 is formed into an arc shape by the preliminary bending portion 14. In addition to being able to bend, the end 19B of the bent side 19 can be brought into close contact with the metal plate 18 at the close contact bent portion 15. Thus, even if the bent side 19 is preliminarily bent using the link cam mechanism and the close bending is not performed as in the related art, the bent side 19 can be bent by one stroke of the bending punch 13 attached to the press. The preliminary bending and the close bending can be performed.

Further, since the preliminary bending of the bending side 19 and the close bending can be performed by one stroke of the bending punch 13, a link cam mechanism for performing the preliminary bending of the bending side 19 as in the related art is unnecessary. , And the vertical movement stroke of the bending punch 13 can be reduced. In addition, since the preliminary bent portion 14 is provided corresponding to the periphery of the metal plate 18, it is formed at the left edge portion 18B, the lower edge portion 18C, and the corner preliminary bent portion 16 of a product such as a vehicle door and a hood. Bent side 1
9 can be bent at the same time. This makes it possible to integrate the close-contact bending device 10 that can simultaneously bend each of the bending sides 19, so that the number of steps for bending the metal plate 18 can be greatly reduced. become.

Further, since the space 19C is formed between the base 19A of the bent side 19 and the body 18A by bending the end portion 19B into close contact with the body 18A, the peripheral edge of the metal plate 18 is formed by the space 19C. It becomes thicker and harder to deform. This makes it possible to enhance the peripheral edge of the metal plate 18. Further, when the bent side 19 is bent, a bending mark is formed between the space 19C and the close bending process on the bending side 19 at the boundary between the preliminary bending portion 14 provided on the bending punch 13 and the close bending portion 15. 19E is attached. Thereby, the apparatus for tightly folding the three-dimensional metal plate 18 of the present invention 10
The metal plate 18 can be distinguished from the metal plate 18 bent by the conventional contact bending device, so that the bending marks 19E on the bent sides 19 where the metal plate 18 is bent can be distinguished. By simply looking at, it is possible to determine that the three-dimensional metal plate 18 is bent by the close-contact bending device 10 of the present invention, and the close-contact bending device 10 can be hardly imitated.

Since the reinforcing metal plate 20 is inserted between the end 19B of the bent side 19 and the main body 18A, the strength of the metal plate 18 can be increased by the space 19C and the reinforcing metal plate 20. . Thereby, even the thin metal plate 18 can be hardly deformed.

[0032]

As described above in detail, according to the first aspect of the present invention, the movable pad for preventing the movement of the bent side at the time of bending and the bent punch are formed so that the bent side is temporarily set to a predetermined angle. It is provided with a preliminary bending portion for bending and a contact bending portion formed on the bending punch and for bringing the bent side preliminarily bent at the preliminary bending portion into close contact with the metal plate. Therefore, for example, by forming the preliminary bending portion in an arc shape as in claim 2, it becomes possible to bend the bending side of the metal plate fixed by the movable pad into an arc shape in the preliminary bending portion. At the same time, it becomes possible to bring the end of the bent side into close contact with the metal plate at the close-contact bending portion. Thus, for example, even if the bent side is preliminarily bent using the link cam mechanism as in the related art, and the close bending is not performed, the preliminary bending of the bent side and the close bending can be performed with one stroke of the bending punch. Can be performed. Therefore,
This makes it possible to greatly reduce the cost of the three-dimensionally shaped metal plate close-contact bending device, and to greatly reduce the equipment of the three-dimensionally shaped metal plate close-contact bending device. .

In particular, the apparatus for tightly folding a three-dimensional metal plate of the present invention can simultaneously perform preliminary bending of a bent side and close bending by one stroke of a bending punch. This eliminates the need for a link cam mechanism for performing a tune, and makes it possible to reduce the vertical stroke of the bending punch. Thereby, for example, the integration of a contact bending device that bends a bent side formed on a left edge portion, a lower edge portion, a corner preliminary bent portion, or the like of a product such as a vehicle door and a hood is performed. The folding sides can be bent at the same time.
Therefore, products, molds, equipment costs, etc. can be greatly reduced, processing can be performed with a general-purpose press machine, automation can be easily performed, and metal This makes it possible to greatly increase the amount of bending at the bent side of the plate.

According to the invention of claim 3, according to claim 1,
In addition, in addition to claim 2, since the preliminary bent portion is provided corresponding to the periphery of the metal plate, for example, the conventional metal plate is bent at a plurality of locations to form one three-dimensional metal. It is possible to bend the plate with the close bending device. As a result, the number of steps for bending the metal plate can be significantly reduced. Therefore, the cost of the bent three-dimensional metal plate can be significantly reduced.

Further, according to the invention of claim 4, the end of the bent side is bent so as to be in close contact with the main body, and a space is formed between the base of the bent side and the main body. Therefore, the peripheral portion of the metal plate can be made thicker by the space. This makes it difficult to deform the peripheral edge of the metal plate, so that reinforcement can be achieved.For example, by simultaneously performing space bending and close contact bending in the conventional plane bending process of the peripheral edge of the metal plate, At the border between the preliminary bending portion and the close bending portion provided on the bending punch, a bending mark can be formed on the bending side between the space portion and the close bending process. Therefore, it is possible to distinguish between a metal plate bent by the three-dimensionally shaped metal plate contact bending device and a metal plate bent by the conventional contact bending device, for example. Just by looking at the bending marks on the bent sides of the bent metal plate, it is possible to determine that the metal plate is bent by the close bending device of the three-dimensional metal plate of the present invention. Is difficult to be imitated.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of a three-dimensionally shaped metal plate contact bending apparatus of the present invention.

FIG. 2 is a perspective view of the three-dimensional metal plate of the present invention bent by the close-contact bending device for a three-dimensional metal plate of the present invention.

FIG. 3 is a vertical sectional side view of the three-dimensionally shaped metal plate of FIG. 2;

FIG. 4 is a longitudinal sectional side view of the close-contact folding device showing a state where a bent side is bent at the close-contact bending portion.

FIG. 5 is a vertical sectional side view of the close-contact bending device, showing a state where a bent side is bent by a bending punch.

FIG. 6 is a vertical cross-sectional side view of the three-dimensionally shaped metal plate of the present invention, showing a state where a corner edge of the metal plate is bent.

FIG. 7 is a perspective view of a metal plate schematically showing a bent state of a bent side.

FIG. 8 is a vertical sectional side view of the metal plate of FIG. 7;

FIG. 9 is a longitudinal sectional side view of a conventional metal plate showing a bent state of a bent side.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Close bending apparatus 11 Upper die 12 Movable pad 13 Folding punch 14 Preliminary bending part 15 Close bending part 16 Square preliminary bending part 17 Lower die 18 Metal plate 18A Main body 18B Left edge 18C Lower edge 18D Square edge Part 19 Bending side 19A Base 19B End part 19C Space part 19D Small space part 19E Bending trace 20 Reinforcement metal plate

Claims (4)

[Claims] 1. A close-contact bending device in which a bent side bent substantially at right angles around a metal plate processed into a three-dimensional shape is bent by a bending punch and closely adhered thereto, A movable pad for preventing the movement of the bent side, a preliminary bending part formed on the bending punch for temporarily bending the bending side by a predetermined angle, and a preliminary bending part formed on the bending punch, A three-dimensional metal plate contact bending device, comprising: a contact bending portion for bringing the bent side preliminarily bent at the bending portion into close contact with the metal plate. 2. The apparatus according to claim 1, wherein the preliminary bending portion is formed in an arc shape. 3. The apparatus according to claim 1, wherein the preliminary bending portion is provided so as to correspond to a periphery of the metal plate. 4. A three-dimensional metal plate having a bent side bent substantially at right angles around a main body, wherein an end of the bent side is bent so as to be in close contact with the main body. A three-dimensional metal plate, wherein a space is formed between the base of the bent side and the main body.