JP7265141B2 - Press-molding blank, press-molding blank manufacturing method, connected molded product manufacturing method, press-molded product manufacturing method, press-molding mold, and press-molding apparatus - Google Patents

Description

The present invention relates to a press-molding blank, a press-molding blank manufacturing method, a connected molded product manufacturing method, a press-molded product manufacturing method, a press-molding die, and a press-molding apparatus.

Conventionally, in the press molding of a metal plate, there are cases where a plurality of parts are simultaneously molded with one mold from the viewpoint of improving productivity. Such a molding means is called, for example, multiple-piece taking.

In such multi-cavity press molding, from the viewpoint of transportability and productivity after press molding, it is desired that press molding be completed in a state where the parts are connected to each other.

On the other hand, when drawing is performed in multiple-cavity press forming, the material is constrained between multiple parts, which hinders the flow of material from the joints between the parts and causes vertical wall cracks. . In order to solve this problem, conventionally, a slit is provided between the parts and the opening is used to avoid obstruction of the material inflow.

For example, in the technique of Patent Document 1 or Patent Document 2, the opening of the notch is used to suppress obstruction of material inflow.
In the technique of Patent Document 3, the opening of the slit is used to prevent the inflow of the material from being obstructed. In the technique of Patent Document 3, a round hole is provided at the tip of the slit for the purpose of preventing cracking at the tip of the slit.

However, when the depth of drawing of the press-formed product is large, the amount of opening of the slit becomes excessive, and there is a possibility that cracks may occur from the tip of the slit. If cracking occurs at the tip of the slit, the parts will separate on the mass production line, and production must be stopped.
In particular, with high-strength steel sheets with low ductility, it is difficult to ensure a sufficient slit opening. It is extremely difficult with the current technology.

Therefore, with the current technology, there is a problem that either the manufacturable range, that is, the drawing depth, or the productivity, must be sacrificed.

Japanese Patent No. 2556202 Japanese Patent No. 4078529 JP-A-63-140727

An object of the present invention, which has been made in view of such circumstances, is to provide a press-molding blank, a method for manufacturing a press-molding blank, and a method for manufacturing a connected molded product that can achieve both a manufacturable range and productivity. , a method for manufacturing a press-molded product, a press-molding die, and a press-molding apparatus.

(1) A press-molding blank according to one aspect of the present invention includes:
A press-molding blank made of a metal plate,
Having a bending portion between a plurality of parts to be molded,
The bending part protrudes in the out-of-plane direction of the press-molding blank ,
The bending part is
A flat portion adjacent to the portion to be molded,
a first ridgeline adjacent to the flat portion;
a rising portion connected to the flat portion via the first ridgeline and protruding in the out-of-plane direction of the press-molding blank;
a projecting portion having a second ridge connecting the rising portions;
including
The rising portion is substantially perpendicular to the flat portion,
In a cross-sectional view of a plane including a plurality of parts to be molded and a bending part,
The length obtained by subtracting the distance between the first ridge lines from the length of the protruding portion is the total length of the vertical wall closest to the bending portion of the plurality of parts forming portions to be formed into the plurality of parts to be formed. is greater than or equal to the length of
It is characterized by
(2) A method for manufacturing a press-molding blank according to one aspect of the present invention includes:
The method for producing a press-molding blank according to (1) above,
It is characterized by including a step of protruding the metal plate in an out-of-plane direction to form a bent portion between a plurality of parts to be formed.

(3) A method for manufacturing a connected molded product according to one aspect of the present invention includes:
In the press-molding blank according to (1) above , wherein the bending part protrudes in the out-of-plane direction of the press-molding blank, a plurality of part-to-be-molded parts are formed on the surface of the press-molding blank. It is characterized by including a part forming step of deforming outward and deforming the bent portion.
(4) A method for manufacturing a connected molded product according to one aspect of the present invention includes:
A method for manufacturing a connected molded product using the press-molding blank according to (1) above,
a preforming step in which the metal plate protrudes in the out-of-plane direction to form a bent portion between a plurality of parts to be formed;
and a part forming step of deforming the plurality of parts to be formed in the out-of-plane direction of the metal plate and deforming the bent part.
(5) In the method for manufacturing a connected molded product according to (3) or (4) above,
In the part molding process,
A part forming portion may be formed in the portion to be formed by drawing, and the connecting portion may be formed by deforming the bending portion so that the depth of the bending portion becomes small.

(6) A method for producing a press-formed product according to an aspect of the present invention is to cut the connecting portions of the connected molded product obtained by the method for producing a connected molded product according to (5) above, and It is characterized by including a dividing step of dividing the.

(7) A press molding die according to an aspect of the present invention is
A mold for manufacturing a connected molded product including a plurality of connected molded parts using the press-molding blank according to (1) above ,
a plurality of punches spaced apart from each other;
dice and
comprising a holder and
The dies and holders are located between multiple punches,
It is characterized in that there are a plurality of dies or holders and they are spaced apart from each other.
(8) A press molding die according to an aspect of the present invention is
A mold for manufacturing a connected molded product including a plurality of connected molded parts using the press-molding blank according to (1) above ,
a plurality of punches spaced apart from each other;
dice and
comprising a holder and
The dies and holders are located between multiple punches,
A slit is provided in the die or holder.
(9) A press molding die according to one aspect of the present invention is
A mold for manufacturing a connected molded product including a plurality of connected molded parts using the press-molding blank according to (1) above ,
a plurality of punches spaced apart from each other;
dice and
a holder;
a bending tool;
The dies and holders are positioned between multiple punches,
A plurality of dies are spaced apart from each other, a space is provided between the dies for inserting a bending tool, and a plurality of holders are spaced apart from each other, and a bending tool is inserted between the holders. A space is provided.
(10) In the press molding die according to any one of (7) to (9) above,
For multiple punches, on the opposite side of the die and holder,
a part forming die;
A component molding holder may further be provided.

(11) A press molding apparatus according to an aspect of the present invention is a press molding apparatus including the mold according to (7) or (8) above,
It is characterized by comprising a spring part or a driving part that holds the die and the holder movably along the pressing direction.
(12) A press molding apparatus according to an aspect of the present invention is a press molding apparatus including the mold according to (9) above,
It is characterized by comprising a spring part or drive part that holds the die, holder and bending tool movably along the pressing direction.

According to the present invention, a press-molding blank, a method for manufacturing a press-molding blank, a method for manufacturing a connected molded product, a method for manufacturing a press-molded product, and a press molding that can achieve both a manufacturable range and productivity. A mold and a press molding apparatus are provided.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic plan view for demonstrating an example of the press molding blank which concerns on 1st Embodiment. BRIEF DESCRIPTION OF THE DRAWINGS It is typical sectional drawing for demonstrating an example of the blank for press molding which concerns on 1st Embodiment. FIG. 4 is a schematic plan view for explaining another example of the press-molding blank according to the first embodiment; FIG. 4 is a schematic plan view for explaining another example of the press-molding blank according to the first embodiment; FIG. 4 is a schematic cross-sectional view for explaining another example of the press-molding blank according to the first embodiment; FIG. 4 is a schematic cross-sectional view for explaining another example of the press-molding blank according to the first embodiment; FIG. 3 is a schematic cross-sectional view for explaining an example of a bent portion of the press-molding blank according to the first embodiment; FIG. 3 is a schematic cross-sectional view for explaining an example of a bent portion of the press-molding blank according to the first embodiment; FIG. 3 is a schematic cross-sectional view for explaining an example of a part-forming portion formed in a part-forming planned portion of the press-molding blank according to the first embodiment; FIG. 3 is a schematic plan view for explaining an example of a bent portion of the press-molding blank according to the first embodiment; FIG. 3 is a schematic plan view for explaining an example of a bent portion of the press-molding blank according to the first embodiment; FIG. 3 is a schematic plan view for explaining an example of a connecting portion of the press-molding blank according to the first embodiment; BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic plan view for demonstrating an example of the metal plate for shape|molding the blank for press molding which concerns on 1st Embodiment. FIG. 10 is a schematic cross-sectional view for explaining the process of deformation of the press-molding blank in the part forming step of the method for manufacturing a connected molded product according to the second embodiment; FIG. 10 is a schematic cross-sectional view for explaining the process of deformation of the press-molding blank in the part forming step of the method for manufacturing a connected molded product according to the second embodiment; FIG. 10 is a schematic cross-sectional view for explaining the process of deformation of the press-molding blank in the part forming step of the method for manufacturing a connected molded product according to the second embodiment; FIG. 3 is a schematic perspective view for explaining an example of a connected molded product obtained by a method for manufacturing a connected molded product according to a second embodiment or a third embodiment; FIG. 11 is a schematic cross-sectional view for explaining an example of a press molding die according to a fifth embodiment; FIG. 11 is a schematic cross-sectional view for explaining an example of a press-molding die according to a fifth embodiment, and is a schematic cross-sectional view showing a state in which a press-molding blank as a workpiece is placed. FIG. 10 is a schematic cross-sectional view for explaining an example of a press-molding die according to a fifth embodiment, and is a schematic cross-sectional view showing a state in which a press-molding blank is sandwiched between the dies. FIG. 11 is a schematic cross-sectional view for explaining an example of the press-molding die according to the fifth embodiment, and is a schematic cross-sectional view showing a state when the die reaches the bottom dead center position. FIG. 12 is a schematic cross-sectional view for explaining another example of the press-molding die according to the fifth embodiment; FIG. 10 is a schematic cross-sectional view for explaining another example of the press-molding die according to the fifth embodiment, and is a schematic cross-sectional view showing a state in which a press-molding blank that is a workpiece is placed. be. FIG. 10 is a schematic cross-sectional view for explaining another example of the press-molding die according to the fifth embodiment, and is a schematic cross-sectional view showing a state in which a press-molding blank that is a workpiece is placed. be. FIG. 11 is a schematic cross-sectional view for explaining an example of a press-molding die according to a sixth embodiment; FIG. 11 is a schematic cross-sectional view for explaining an example of a press-molding die according to a sixth embodiment, and is a schematic cross-sectional view showing a state in which a metal plate as a work material is placed. FIG. 12 is a schematic cross-sectional view for explaining an example of a press-molding die according to a sixth embodiment, and is a schematic cross-sectional view showing a state in which a metal plate is sandwiched between the dies. FIG. 11 is a schematic cross-sectional view for explaining an example of a press-molding die according to a sixth embodiment, and is a schematic cross-sectional view showing a state in which a metal plate is protruded by a bending tool. FIG. 11 is a schematic cross-sectional view for explaining an example of a press-molding die according to a sixth embodiment, and a schematic cross-sectional view showing a state when the die reaches a bottom dead center position. FIG. 11 is a schematic plan view for explaining another example of the press-molding die according to the sixth embodiment; It is a typical sectional view for explaining an example of a press molding device concerning a 7th embodiment. It is a typical sectional view for explaining an example of a press forming device concerning an 8th embodiment. FIG. 20 is a schematic cross-sectional view for explaining an example of a press forming apparatus according to an eighth embodiment, and is a schematic cross-sectional view showing a state in which a metal plate is sandwiched between dies. FIG. 20 is a schematic cross-sectional view for explaining an example of a press forming apparatus according to an eighth embodiment, and is a schematic cross-sectional view showing a state in which a metal plate is protruded by a bending tool. It is a typical sectional view for explaining an example of a press molding device concerning an 8th embodiment, and is a typical sectional view showing a state when a metallic mold reaches a bottom dead center position. FIG. 21 is a schematic cross-sectional view for explaining another example of the press molding device according to the eighth embodiment; FIG. 20 is a schematic cross-sectional view for explaining another example of the press molding apparatus according to the eighth embodiment, and is a schematic cross-sectional view showing a state in which a metal plate is sandwiched between dies. FIG. 20 is a schematic cross-sectional view for explaining another example of the press forming apparatus according to the eighth embodiment, and is a schematic cross-sectional view showing a state in which a metal plate is protruded by a bending tool. FIG. 20 is a schematic cross-sectional view for explaining another example of the press molding apparatus according to the eighth embodiment, and is a schematic cross-sectional view showing a state when the mold reaches the bottom dead center position.

Embodiments of the present invention will be described below with reference to examples, but it is obvious that the present invention is not limited to the examples described below. In the following description, specific numerical values and materials may be exemplified, but other numerical values and materials may be applied as long as the effects of the present invention can be obtained.
Also, each component of the following embodiments can be combined with each other.

[First embodiment]
The press-molding blank according to the present embodiment is a press-molding blank made of a metal plate, and has a bent portion between portions to be molded for a plurality of parts, and the bent portion is out of the plane of the press-molded blank. protruding in the direction

FIG. 1 is a schematic diagram for explaining an example of the press-molding blank 100 according to the present embodiment, and is a plan view of the press-molding blank 100 viewed from the plate surface direction.
In the example of FIG. 1 , the press-molding blank 100 has a bending part 102 between two parts-to-be-molded parts 101 . A connection portion 103 is provided between the two parts to be molded 101 , and the connection portion 103 is provided with a bending portion 102 . The part-to-be-molded portion 101 may be in a region surrounded by a rectangle (dotted line) indicated by 101 in FIG. 1, or in a range including this region.

FIG. 2 is a schematic diagram for explaining an example of the press-molding blank 100 according to the present embodiment, including the AA′ line in FIG. 2 is a cross-sectional view of the press-molding blank 100 taken along a plane perpendicular to the plate surface). FIG.

As shown in FIG. 2, the bent portion 102 protrudes out of the plane of the press-molding blank 100 . A portion of the bending portion 102 that protrudes in the out-of-plane direction of the press-molding blank 100 is referred to as a protruding portion 104 . The bend 102 may be within or including the area enclosed by the two dashed lines indicated by 102 in FIG.

For example, two parts to be molded may be provided as in the example of FIG. Alternatively, as in the example of FIG. 3, a plurality of parts-to-be-molded portions 201 may be arranged along one direction and provided three in number, or may be provided in four or more. A bending portion 202 and a connecting portion 203 are positioned between the parts to be molded 201 .

Alternatively, as in the example of FIG. 4, the plurality of parts to be molded may be provided in two rows in each direction perpendicular to each other, for a total of four parts. In this case as well, the bending portion 302 and the connecting portion 303 are positioned between the parts to be molded 301 .
A plurality of parts to be molded may be provided in three or more rows (total of nine or more) along respective directions orthogonal to each other. In this case, the number of component molding sections provided in one direction may be different from the number of rows of component molding sections provided in the other direction.

FIG. 5 or FIG. 6 is a schematic diagram for explaining an example of the press-molding blank according to the present embodiment. It is sectional drawing which carried out the cross-sectional view.

If the bending portion protrudes in the out-of-plane direction of the press-molding blank at least at the protruding portion, the cross section thereof is inclined with respect to the plate surface of the part-to-be-molded portion 401, as in the example of FIG. It may have a face. Alternatively, the bent portion may have a semi-circular or semi-elliptical cross-section, for example, as in the example of FIG.

FIG. 7 is a schematic cross-sectional view for explaining an example of the bent portion of the press-molding blank according to the present embodiment, and is an enlarged view showing the vicinity of the bent portion.

As shown in FIG. 7, the bending portion of the press-molding blank according to the present embodiment has a flat shape adjacent to each of the parts-to-be-molded portions 601 in the bending-to-be-molded portions 602 located between the plurality of parts-to-be-molded portions 601 . A portion 605 may be included. In addition, as shown in FIG. 7, the bending portion of the press-molding blank according to the present embodiment includes a first ridgeline 606 adjacent to the flat portion 605 in the bending portion 602, and a flat portion across the first ridgeline 606. A protrusion 604 having a raised portion 607 connected to the portion 605 and protruding in the out-of-plane direction of the press molding blank 600 and a second ridge line 608 connecting the raised portions 607 may be included.
In the example of FIG. 7, the bent portion 602 includes a pair of flat portions 605, a pair of first ridgelines 606, a pair of raised portions 607, and a second ridgeline 608. In the example of FIG. The projecting portion 604 includes a pair of first ridgelines 606 , a pair of rising portions 607 and a second ridgeline 608 .

As shown in FIG. 7, the press-molding blank 600 includes a bend forming portion 602 including a riser portion 607 to provide sufficient inflow material area for material inflow into the part to be formed in the part forming portion 601. can be ensured by the bending portion 602 . Therefore, the distance between parts to be molded 601 can be further reduced, and surplus material can be further reduced while securing the drawing depth and productivity of the press-formed product.

The raised portion 607 may be substantially perpendicular to the flat portion 605 or may be angled at an angle of 45° with respect to the flat portion 605 .

The bottom of the protrusion 604 including the second ridgeline 608 may have a curved surface that does not crack the material of the press molding blank 600 .

In the press-molding blank according to the present embodiment, the length obtained by subtracting the distance between the first ridge lines from the length of the protruding portion in a planar cross-sectional view including the plurality of parts to be molded and the bending portion is a plurality of It may be equal to or greater than the total length of the vertical walls closest to the bent portion of the plurality of component forming portions to be formed in the component forming portion.
Thereby, cracking of the vertical wall of the press-formed product can be suppressed.

As shown in FIG. 8, the length l of the protruding portion 704 is the length of the bending portion 702 passing through the second ridge line 708 in a plan view including the parts to be molded 701 and the bending portion 702 . It is the length of the projecting portion 704 from one first ridgeline portion 706 to the other first ridgeline portion 706 . The distance between the first ridges is the linear distance w from one first ridge 706 to the other first ridge 706 in the same cross-sectional view as shown in FIG.

As shown in FIG. 9, the total length of the vertical walls closest to the bending portion of the plurality of component forming portions is the vertical wall of the component forming portion 810 formed in the component forming portion 801. 811 lengths h1 and h2.

The length h1 or h2 of the vertical wall 811 is the length on the surface of the vertical wall 811 connecting the upper and lower ridgelines of the vertical wall 811 in the same cross-sectional view as above.
That is, the press-molding blank according to the present embodiment may satisfy the relationship of (l−w)>(h1+h2).

A plane containing a plurality of parts to be molded and a bending part is specifically a plane containing an arbitrary bending part and a plurality of parts to be molded adjacent thereto. It is preferable that the plane including the plurality of part-to-be-formed portions and the bend-formed portion includes the center portion of the plurality of part-to-be-formed portions and the center portion of the bend-formed portion.
In this embodiment, the ridgeline or ridgeline portion may be the boundary of the sites connected by them. For example, the first ridgeline portion may be the boundary between the flat portion and the rising portion. In this case, the above lengths are calculated relative to this boundary.

The press-molding blank according to the present embodiment is manufactured by a press-molding blank manufacturing method including a step of projecting a metal plate in an out-of-plane direction to form a bent portion between portions to be molded of a plurality of parts. may

In the step of protruding the metal plate in the out-of-plane direction to form the bent portion, the bent portion is formed between a plurality of parts to be formed by pressing and bending the metal plate using a bending tool or the like.
The step of forming the bent portion may employ the same means as the preforming step of the third embodiment, which will be described later.

The width of the connecting portion may be smaller than the width of the part-to-be-molded portion as shown in FIG. good too. Alternatively, the width of the connecting portion may be greater than the width of the part-to-be-molded portion.
The bending portion may be provided over the width direction of the connecting portion, or as shown in FIG. may

A plurality of bend forming parts may be provided between parts to be formed. For example, as shown in FIG. 11, a plurality of bending portions 1002 may be provided along the direction in which a plurality of part-to-be-molded portions 1001 are arranged.

Also, as shown in FIG. 12 , a plurality of joints 1103 spaced apart from each other may be provided between parts to be molded 1101 along the width direction of the joints 1103 .

When a plurality of parts-to-be-molded parts are provided along respective directions perpendicular to each other, as shown in FIG. A hole h may be provided in the central portion.
Due to the presence of such a hole h, when the metal plate 10 is made to protrude in the out-of-plane direction and a bending portion is formed between a plurality of parts to be formed, an overhang crack occurs at the center portion of the metal plate. can be suppressed.

Alternatively, the metal plate may be without holes. The metal plate may also be provided with cutouts, slits, other protrusions, and the like.

The metal plate may be one in which another member is connected in the plate thickness direction or surface direction, and a plated layer may be provided on the plate surface.

Since the press-molding blank according to the present embodiment can suppress obstruction of the material flowing into the vertical wall portion of the press-molded product, it can suppress the occurrence of cracks at the connecting portion between the parts, and the notch can be suppressed. The drawing depth of the press-formed product can be obtained more than the conventional technology adopting slits.
[Second embodiment]
Next, an embodiment of the method for manufacturing a connected molded product of the present invention will be described.

A method for manufacturing a connected molded product according to the present embodiment is a press-molding blank made of a metal plate and having a bent portion between a plurality of parts to be molded, wherein the bent portion is a surface of the press-molded blank. A method for manufacturing a connected molded product from outwardly projecting press molding blanks.
In the method for manufacturing a connected molded product according to the present embodiment, a part forming step of deforming a plurality of parts to be molded of the press-molding blank in the out-of-plane direction of the press-molding blank and deforming the bent part is performed. include.

In the method for manufacturing a connected molded product according to this embodiment, for example, the press-molding blank described in the first embodiment can be preferably used.
FIGS. 14 to 16 show the deformation process of the press-molding blank in the component molding process of the method for manufacturing a connected molded product according to this embodiment.

FIGS. 14 to 16 show a press-molding blank on a plane perpendicular to the plate surface of the press-molding blank, including a plurality of part-molding portions and a bending portion formed into a plurality of parts-to-be-molded portions. It is sectional drawing which carried out the cross-sectional view.

The press-molding blank 1200 of FIG. 14 has a bending part 1202 and a connecting part 1203 between a plurality of parts to be molded 1201, and the bending part 1202 protrudes in the out-of-plane direction of the press-molding blank 1200. ing. A portion protruding in the out-of-plane direction of the press-molding blank 1200 is referred to as a protruding portion 1204 .

FIG. 15 shows an intermediate process of deforming a plurality of parts-to-be-molded portions 1201 of the press-molding blank 1200 in the out-of-plane direction of the press-molding blank 1200 and deforming the bent portion 1202 .

As shown in FIG. 15 , in the method for manufacturing a connected molded product according to the present embodiment, the bent portions 1202 are deformed as the plurality of part-to-be-molded portions 1201 are deformed in the out-of-plane direction of the press-molding blank 1200 . be done. In the example of FIG. 15, the parts to be molded 1201 are deformed in a direction opposite to the projecting direction of the projecting portion 1204 .

FIG. 16 is a diagram showing a connected molded product 1300 in which part-molding portions are molded in a plurality of parts-to-be-molded portions.

As shown in FIG. 16, a plurality of part forming portions 1310 are formed in the connected molded product 1300, and the bent portion 1202 of the press forming blank 1200 in FIG. 14 is deformed from the state in FIG.

In the example of FIG. 16, the bent portion is flattened back into a flat connecting portion 1303 located between a plurality of part forming portions 1310 . The bent portion need not necessarily be bent back flat, and the connecting portion may have a protrusion.

In the method for manufacturing a connected molded product according to the present embodiment, press molding is performed using a press molding blank having a bent part, so that multiple-piece draw molding is performed without causing vertical wall cracks in the part. can be implemented.
In the method for manufacturing a connected molded product according to the present embodiment, the bent portion is bent back during draw forming, thereby supplying the material to the portion requiring the inflow of the material. The amount of bending can be determined according to the depth of drawing of the product, and since bending deformation is used in the bending part, cracks are less likely to occur and parts with large drawing depths can be easily handled.
[Third embodiment]
Next, another embodiment of the method for manufacturing a connected molded product of the present invention will be described.

A method for manufacturing a connected molded product according to the present embodiment includes a preforming step in which a metal plate protrudes in an out-of-plane direction to form a bending portion between a plurality of parts to be molded, and a plurality of parts to be molded. is deformed in the out-of-plane direction of the metal plate, and a part forming step of deforming the bent portion.

In the preforming step, the metal plate is protruded in the out-of-plane direction to form bend-formed portions between a plurality of parts to be formed.

The metal plate may be processed into a desired shape in advance. For example, the width of the portion where the bent portion is to be formed may be narrower than the width of the part to be molded, or a hole, notch, slit, or the like may be formed.

In the preforming step, the bent portion is formed using, for example, a bending tool. The bending tool may be provided in the press molding device as part of the press molding die.

The shape of the bent portion is preferably that of the press-molding blank according to the first embodiment, for example.

In the part molding process, the same process as the part molding process of the manufacturing method of the connected molded product according to the second embodiment can be preferably used.
In the method for manufacturing a connected molded product according to this embodiment, the steps from metal plates to molding of a connected molded product can be performed in a single mold.

In the method for manufacturing a connected molded product according to the present embodiment, pre-bending is performed between parts to be molded by an inflow amount necessary for molding the part, so that a plurality of parts are formed without causing vertical wall cracks in the part. Individual draw forming can be performed.

The material is supplied to the portion requiring the inflow of the material by bending back the bent portion during the draw forming. The amount of bending can be determined according to the depth of drawing of the product, and since bending deformation is used in the bending part, cracks are less likely to occur and parts with large drawing depths can be easily handled.

In the method for manufacturing a connected molded product according to the second embodiment or the third embodiment described above, in the part forming step, the part forming part is formed in the part to be formed by drawing, and the depth of the bent part is The connecting portion may be formed by deforming the bending portion so as to become smaller.
FIG. 17 shows an example of a connected molded product obtained by the method for manufacturing a connected molded product according to the second embodiment or the third embodiment.

As shown in FIG. 17 , a connected molded product 1400 has a form in which a plurality of component molded parts 1410 are connected by connecting parts 1403 .
A plurality of parts can be transported or processed as one member by manufacturing a connected molded product of such a form, and productivity is improved.

The connecting portion may have any shape as long as it connects the part forming portions and has strength enough to withstand the transportation of the connected molded product.

In the example of FIG. 17, component molding portion 1410 has a simple cup shape, but the shape of component molding portion 1410 is not limited to this.
In addition, since there are no cutouts, slits, or deformed holes in the connecting part of the connected molded product of this type, cracks due to cutouts and slits do not occur, and parts can be manufactured on the mass production line. separation can be suppressed. In addition, it is possible to suppress cracking of the connecting portion during transportation.

In the above description of the second embodiment or the third embodiment, an example in which a plurality of parts to be molded is deformed in a direction opposite to the projecting direction of the protruding part of the bend forming part has been described. The portion may be deformed in the same direction as the projecting direction of the projecting portion of the bending portion. Moreover, the component molding portions molded into the connected molded product may be molded so as to protrude in mutually opposite directions.

[Fourth embodiment]
Next, an embodiment of the method for manufacturing a press-formed product of the present invention will be described.

The method for manufacturing a press-formed product according to the present embodiment is characterized by including a dividing step of cutting the connecting portion of the connected molded product to separate the molded parts from each other.
As the connected molded product according to this embodiment, a connected molded product obtained by the method for manufacturing a connected molded product according to the second embodiment or the third embodiment can be preferably used.

A connected molded product obtained by the method for manufacturing a connected molded product according to the second embodiment or the third embodiment has a form in which a plurality of component molded parts are connected by connecting parts. In the cutting step of the method for manufacturing a press-formed product according to the present embodiment, the component molded portion can be separated by cutting the connecting portion by means of shearing (shear cutting), laser cutting, or the like.

The method of manufacturing a press-formed product according to the present embodiment may include a conveying step between the part forming step and the dividing step of the second or third embodiment.

In the method for manufacturing a press-formed product according to the present embodiment, a plurality of parts can be transported or processed as one member in the transporting process from the part forming process to the dividing process, thereby improving productivity. In addition, it is possible to secure the manufacturable range of the press-formed product such as the drawing depth while securing the productivity.

[Fifth embodiment]
Next, an embodiment of the press molding die of the present invention will be described.
The press-molding die according to the present embodiment is a die for manufacturing a connected molded product including a plurality of connected component forming portions.
A press molding die according to the present embodiment includes a plurality of punches, dies, and a holder that are spaced apart from each other. The dies and holders are positioned between the plurality of punches. and are spaced apart from each other.

FIG. 18 shows a schematic cross-sectional view of a press molding die according to this embodiment.
As shown in FIG. 18, a press molding die 2000 according to this embodiment includes two punches 2001, a die 2002, and a holder 2003 which are spaced apart from each other.

Die 2002 and holder 2003 are located between two punches 2001 . Specifically, in the example of FIG. 18 , two holders 2003 are positioned between two punches 2001 and adjacent to each punch 2001 . Also, the die 2002 is positioned to face the two holders 2003 .

The pressing surface 2001a of the punch 2001 and the pressing surface 2003a of the holder 2003 face the same direction. The press surface 2002a of the die 2002 faces in the direction opposite to the direction in which the press surface 2001a of the punch 2001 faces.

Further, as shown in FIG. 18, a press molding die 2000 according to the present embodiment includes a part molding die 2004 and a part molding die 2004 and a and a holder 2005 .

In the example of FIG. 18, two punches 2001 have two part forming holders 2005 adjacent to each punch 2001 . In addition, the two component molding dies 2004 are positioned to face the two component molding holders 2005 respectively.

A press surface 2001a of the punch 2001 and a press surface 2005a of the component molding holder 2005 face the same direction. The pressing surface 2004a of the component forming die 2004 faces in the direction opposite to the direction in which the pressing surface 2001a of the punch 2001 faces.

In this embodiment, the press surface means a surface on which the punch 2001, the die 2002, the holder 2003, the part forming die 2004, the part forming holder 2005, etc. hold or press the workpiece in the out-of-plane direction. do.

Next, an example of a method of forming a connected molded product using the press molding die according to this embodiment will be described.

The press-molding die according to this embodiment can preferably use the press-molding blank according to the first embodiment as a workpiece.

In the press-molding die 2000 of FIG. 18, there is a press-molding blank made of a metal plate, which has a bending portion between portions to be molded for a plurality of parts, and the bending portion is a surface of the press-molding blank. When placing the press-molding blank protruding outward, as shown in FIG. A molding blank 1500 is placed.

Since the two holders 2003 are spaced apart from each other in the press molding die 2000, a part of the bent portion 1502 (protruding portion 1504) can be positioned in the space between the two holders 2003. .

From the state shown in FIG. 19, the die 2002 and the part-forming die 2004 are moved relatively close to the holder 2003 and the part-forming holder 2005, and the pressing surface 2002a of the die 2002 and the pressing surface 2003a of the holder 2003 perform press molding. The blank 1500 is sandwiched and held. This state is shown in FIG. In addition, the press surface 2004a of the component molding die 2004 and the press surface 2005a of the component molding holder 2005 sandwich and hold the press molding blank 1500 .

The press-molding blank 1500 may be held by the die 2002, the holder 2003, the part-forming die 2004, and the part-forming holder 2005 with a force that suppresses the movement in the out-of-plane direction.

Next, the punch 2001 is moved relative to the die 2002 and the part forming die 2004 in a direction toward the die 2002 and the part forming die 2004 . By this process, the parts-to-be-molded portion 1501 of the press-molding blank 1500 is deformed in the out-of-plane direction of the press-molding blank 1500 . At the same time when the part forming portion 1510 is formed, the bent portion 1502 is deformed.

FIG. 21 is a schematic cross-sectional view for explaining the state of the press molding die 2000 when the die reaches the bottom dead center position.

By the movement of the press molding die 2000 as described above, a connected molded product 1600 including a plurality of component molding portions 1610 connected via connecting portions 1603 as shown in FIG. 21 is manufactured.

By cutting the connecting portion 1603 of the connected molded product 1600, the part molded portion 1610 can be separated.

By using the press-molding die according to the present embodiment, it is possible to suppress the obstruction of the material flowing into the vertical wall portion of the press-molded product, and thus it is possible to suppress the occurrence of cracks at the connecting portion between the parts. In addition, the depth of drawing of the press-formed product can be obtained as compared with the conventional technology that employs notches and slits.

FIG. 22 shows a press molding die 3000 according to another example of this embodiment. As shown in FIG. 22, the die 3002 and holder 3003 are positioned between the two punches 2001 . In the example of FIG. 22, a holder 3003 is positioned between two punches 3001 . Also, the two dies 3002 are positioned to face the holder 3003 .

The pressing surface 3001a of the punch 3001 and the pressing surface 3003a of the holder 3003 face the same direction. The press surface 3002a of the die 3002 faces in the direction opposite to the direction in which the press surface 3001a of the punch 3001 faces.

The example of FIG. 22 has the same configuration as the press molding die 2000 shown in FIG. 18 except that there are two dies 3002 and one holder 3003 .

In the press-molding die 3000 of FIG. 22, there is a press-molding blank made of a metal plate, which has bending portions between portions to be molded for a plurality of parts, and the bending portions are the faces of the press-molding blank. When placing a press-molding blank protruding outward, as shown in FIG. A blank 1700 can be placed.

The press-molding die 3000 illustrated in FIG. 22 also operates in the same manner as the press-molding die 2000 illustrated in FIG. 18, and can obtain the same effects as the press-molding die 2000 .

In addition, a press molding die according to another example of the present embodiment is a die for manufacturing a connected molded product including a plurality of connected component molding portions, and is provided with a plurality of parts separated from each other. a punch, a die and a holder, wherein the die and the holder are positioned between the plurality of punches, and the die or the holder is provided with a slit.

FIG. 24 shows a press molding die 4000 according to another example of this embodiment. As shown in FIG. 24, the die 4002 and holder 4003 are located between the two punches 4001 . In the example of FIG. 24, a holder 4003 is positioned between two punches 4001 and a slit 4006 is provided in the holder 4003 . Also, the die 4002 is positioned to face the holder 4003 . There is one die 4002 and one holder 4003 .

The pressing surface 4001a of the punch 4001 and the pressing surface 4003a of the holder 4003 face the same direction. The press surface 4002a of the die 4002 faces in the direction opposite to the direction in which the press surface 4001a of the punch 4001 faces.

In the press-molding die 4000 of FIG. 24, there is a press-molding blank made of a metal plate, which has bending portions between portions to be molded for a plurality of parts, and the bending portions are the faces of the press-molding blank. When placing the press-molding blank projecting outward, as shown in FIG. A press-molding blank 1700 is placed as follows.

In the press molding die 4000 , a portion of the bending portion 1702 (protruding portion 1704 ) can be positioned within the slit 4006 .

The example of FIG. 24 has the same configuration as the press molding die 2000 shown in FIG. 18 except that the holder 4003 is provided with a slit 4006 .

The press-molding die 4000 illustrated in FIG. 24 also operates in the same manner as the press-molding die 2000 illustrated in FIG. 18, and can obtain the same effects as the press-molding die 2000 .

Alternatively, as a configuration similar to the example of FIG. 24, a holder may be positioned between two punches and a slit may be provided in the die.

In this case, as in the example of the press-molding die 3000 shown in FIG. 22, a part (protruding portion) of the bent portion of the press-molding blank can be located in the slit provided in the die. In this case, the configuration is the same as that of the press molding die 3000 shown in FIG. 22 except that the die is provided with slits. This press-molding die also operates in the same manner as the press-molding die 3000 illustrated in FIG. 22, and can obtain the same effects as the press-molding die 3000.

[Sixth Embodiment]
Next, another embodiment of the press molding die of the present invention will be described.
The press-molding die according to the present embodiment is a die for manufacturing a connected molded product including a plurality of connected component forming portions.
A press molding die according to this embodiment includes a plurality of punches, dies, a holder, and a bending tool that are spaced apart from each other. There are a plurality of and spaced apart from each other, a space is provided between the dies for bending tools to pass through, and a plurality of holders are provided spaced apart from each other, a space where the bending tools are inserted between the holders is provided.

FIG. 25 shows a schematic cross-sectional view of a press molding die according to this embodiment.

As shown in FIG. 25, a press molding die 6000 according to this embodiment includes two punches 6001, a die 6002, a holder 6003, and a bending tool 6007, which are spaced apart from each other.

Die 6002 and holder 6003 are located between two punches 6001 . Specifically, in the example of FIG. 25 , two holders 6003 are positioned between two punches 6001 and adjacent to each punch 6001 . The two holders 6003 are positioned apart from each other.

In the example of FIG. 25, two dies 6002 are positioned between two punches 6001, and the two dies 6002 are positioned to face two holders 6003, respectively. The two dies 6002 are spaced apart from each other.

A space through which a bending tool 6007 is inserted is provided between the two dies 6002 and between the two holders 6003 .

The pressing surface 6001a of the punch 6001 and the pressing surface 6003a of the holder 6003 face the same direction. The press surface 6002a of the die 6002 faces in the direction opposite to the direction in which the press surface 6001a of the punch 6001 faces.

Further, as shown in FIG. 25, a press molding die 6000 according to the present embodiment includes a part molding die 6004 and a part molding die 6004 and a A holder 6005 is further provided.

In the example of FIG. 25, two punches 6001 have two part forming holders 6005 adjacent to each punch 6001 . In addition, the two component molding dies 6004 are positioned to face the two component molding holders 6005 respectively.

A press surface 6001a of the punch 6001 and a press surface 6005a of the component molding holder 6005 face the same direction. The pressing surface 6004a of the component forming die 6004 faces in the direction opposite to the direction in which the pressing surface 6001a of the punch 6001 faces.

In this embodiment, the press surface means a surface on which the punch 6001, the die 6002, the holder 6003, the part forming die 6004, the part forming holder 6005, etc. hold or press the workpiece in the out-of-plane direction. do.

Next, an example of a method of forming a connected molded product using the press molding die according to this embodiment will be described.

A metal plate can be preferably used as a workpiece for the press molding die according to the present embodiment.

First, as shown in FIG. 26, the metal plate 11 is placed in the press molding die 6000 .
At this time, the bending tool 6007 is positioned between the two dies 6002 .

Next, as shown in FIG. 27, from the state shown in FIG. 26, the die 6002 and the component molding die 6004 are brought relatively closer to the holder 6003 and the component molding holder 6005, and the pressing surface 6002a of the die 6002 and the pressing surface 6002a are pressed. The press surface 6003 a of the holder 6003 sandwiches and holds the metal plate 11 . Further, the metal plate 11 is sandwiched and held between the pressing surface 6004a of the component molding die 6004 and the pressing surface 6005a of the component molding holder 6005. FIG.

The metal plate 11 may be held by the die 6002, the holder 6003, the part forming die 6004, and the part forming holder 6005 with such a force as to suppress the movement in the out-of-plane direction.

The bending tool 6007 may also be brought relatively close to the holder 6003 and the part forming holder 6005 together with the die 6002 and the part forming die 6004, but this is not essential.

Next, as shown in FIG. 28, a bending tool 6007 is pressed against the metal plate 11 to protrude the metal plate 11 in the out-of-plane direction.
This projecting portion may be called a bent portion. Also, the metal plate 11 in this state may be referred to as a press-molding blank. Moreover, the shape of the metal plate 11 in this state may be the same shape as the press-molding blank according to the first embodiment described above.

Punch 6001 is then moved relative to die 6002 and part forming die 6004 in a direction toward die 6002 and part forming die 6004 . Through this process, a portion of the metal plate 11 is deformed in the out-of-plane direction of the metal plate 11 . A portion of the metal plate 11 is deformed in the out-of-plane direction of the metal plate 11, and at the same time, the bent portion formed by the bending tool 6007 is deformed.

At this time, the bending tool 6007 may be retracted in a direction opposite to the direction in which the metal plate 11 is deformed as the bending portion is deformed. Alternatively, after the bent portion is formed by the bending tool 6007, the bending tool 6007 may retreat in the direction opposite to the direction in which the metal plate 11 is deformed.

FIG. 29 is a schematic cross-sectional view for explaining the state of the press molding die 6000 when the die reaches the bottom dead center position.
By the movement of the press molding die 6000 as described above, a connected molded product 1800 including a plurality of molded part parts 1810 connected via connecting parts 1803 as shown in FIG. 29 is manufactured.

In the connected molded product 1800 , the part molded parts 1810 can be separated from each other by cutting the connecting part 1803 .

The tip 6007b of the bending tool 6007 that contacts the metal plate 11 first may have a curved surface that does not cause cracks in the metal plate 11 when the metal plate 11 is bent.

By using the press-molding die according to the present embodiment, it is possible to suppress the obstruction of the material flowing into the vertical wall portion of the press-molded product, and thus it is possible to suppress the occurrence of cracks at the connecting portion between the parts. In addition, the depth of drawing of the press-formed product can be obtained as compared with the conventional technology that employs notches and slits.

In the above example, the configuration in which the bending tool 6007 is positioned between the two dies 6002 in the initial state where the metal plate 11 is placed in the press molding die 6000 has been described. However, the press molding die according to this embodiment is not limited to such a form.
Specifically, the bending tool may be positioned between the two holders in the initial state in which the metal sheet is placed in the press molding die.

Further, in the press molding die according to another example of the present embodiment, a space through which the bending tool is inserted may be provided in the die and the holder, and the bending tool may be movably inserted in this space. In this case, it is not necessary to provide a plurality of dies and holders. The space provided in the die and holder should be suitable for the shape of the bending tool to be inserted.

Alternatively, only the die may be provided with a space through which the bending tool is inserted, and the two holders may be positioned apart from each other. Alternatively, only the holder may be provided with a space through which the bending tool is inserted, and the two dies may be positioned apart from each other. In these cases, the bending tool is movably inserted through a space provided in the die or holder and a space between the holder or die.

FIG. 30 is a schematic plan view for explaining another example of the press molding die according to this embodiment.

FIG. 30 is a plan view of the press-molding die 8000 viewed from a direction perpendicular to the pressing surface 8001a of the punch 8001 of the press-molding die 8000. FIG. As shown in FIG. 30 , four bending tools 8007 may be provided via holders 8003 between punches 8001 provided in two rows in each direction orthogonal to each other, a total of four punches 8001 . . The number of punches 8001 and the number of rows provided with the punches 8001 do not matter. Also, the four bending tools 8007 may be connected.

In addition, in the fifth and sixth embodiments, the direction parallel to the movement direction of the mold components such as the punch, the die, the holder, and the bending tool may be referred to as the press direction. The pressing direction may be substantially perpendicular to the pressing surface of a mold component such as a punch, die, holder, bending tool, or the like.

In the press-molding die according to the present embodiment, it is possible to obtain the effect that pre-bending can be performed without increasing the number of processes by devising the die structure.

[Seventh Embodiment]
Next, an embodiment of the press molding apparatus of the present invention will be described.
A press molding apparatus according to the present embodiment is a mold for manufacturing a connected molded product including a plurality of connected component molding portions, and includes a plurality of punches, dies, and a holder that are spaced apart from each other. and wherein the dies and holders are positioned between a plurality of punches, and a mold having a plurality of dies or holders spaced apart from each other.
The press molding device according to this embodiment includes a spring portion or a driving portion that holds the die and the holder movably along the pressing direction.

FIG. 31 shows a schematic cross-sectional view of a press molding device 9000 according to this embodiment.

As shown in FIG. 31, a press forming apparatus 9000 according to this embodiment includes two punches 9001, a die 9002, and a holder 9003 which are spaced apart from each other.

Die 9002 and holder 9003 are located between two punches 9001 . Specifically, in the example of FIG. 31 , two holders 9003 are positioned between two punches 9001 and adjacent to each punch 9001 . Also, the die 9002 is positioned to face the two holders 9003 .

The pressing surface 9001a of the punch 9001 and the pressing surface 9003a of the holder 9003 face the same direction. The press surface 9002a of the die 9002 faces in the direction opposite to the direction in which the press surface 9001a of the punch 9001 faces.

Further, as shown in FIG. 31, the press molding apparatus 9000 according to the present embodiment includes a part molding die 9004 and a part molding holder 9005 on the opposite side of the plurality of punches 9001 from the die 9002 and the holder 9003. and furthermore.

As shown in FIG. 31, in the press molding device 9000 according to this embodiment, the punch 9001 is directly connected to the first fixing portion 9010 and does not move in the pressing direction. Die 9002 is connected to second fixing portion 9020 via spring portion 9032 . The holder 9003 is connected to the first fixing part 9010 via the spring part 9033 . Also, the part forming die 9004 is connected to the second fixing portion 9020 via the spring portion 9034 . The component molding holder 9005 is connected to the first fixing portion 9010 via the spring portion 9035 .

The movement of the mold in the press molding apparatus 9000 according to this embodiment may be the same movement as that of the mold described in the fifth embodiment.

Next, an example of a method of performing press molding using the press molding apparatus 9000 according to this embodiment will be described.

In the press forming apparatus 9000 according to the present embodiment, a press forming blank made of a metal plate has a bending portion between a plurality of parts to be formed, and the bending portion is a surface of the press forming blank. When placing the press-molding blank protruding outward, the press-molding blank is placed so that a part of the bent portion (protruding portion) is positioned between the two holders 9003 .

In the press molding apparatus 9000 according to the present embodiment, the first fixing portion 9010 and the second fixing portion 9020 are moved relatively close to each other, so that the die 9002 and the part forming die 9004 are moved to the holder 9003 and the part forming holder 9005. can be brought relatively close to As a result, the pressing surface 9002a of the die 9002 and the pressing surface 9003a of the holder 9003 as well as the pressing surface 9004a of the component molding die 9004 and the pressing surface 9005a of the component molding holder 9005 sandwich and hold the blank for press molding.

In the press molding apparatus 9000 according to the present embodiment, the spring portion 9033 of the holder 9003 and the spring portion 9035 of the component molding holder 9005 are moved by moving the first fixing portion 9010 and the second fixing portion 9020 closer to each other. Shrinking, the holder 9003 and the part forming holder 9005 move in the same direction as the die 9002 and the part forming die 9004 .

At this time, the punch 9001 relatively moves in a direction opposite to the moving direction of the die 9002 and the component forming die 9004 . This step deforms the press-molding blank in the out-of-plane direction of the press-molding blank. In addition, the bending portion is deformed at the same time when the component forming portion is formed.

By the movement of the press molding apparatus 9000 as described above, for example, a connected molded product 1600 including a plurality of component molded parts 1610 connected via connecting parts 1603 as shown in FIG. 21 is manufactured.

In another example of the press molding apparatus according to the present embodiment, a configuration in which there are two dies and one holder may be adopted. In this case, the press-molding blank, which is the material to be processed, is placed in the press-molding device so that a part (projection) of the bent portion of the press-molding blank is positioned between the two holders.
In this example of the press molding apparatus, a mold as shown in FIG. 22 can be preferably used.

In addition, a press molding apparatus according to another example of the present embodiment is a mold for manufacturing a connected molded product including a plurality of connected component molding portions, and includes a plurality of punches spaced apart from each other. and a die and a holder, wherein the die and the holder are positioned between a plurality of punches, the die or the holder is provided with a slit, and the die and the holder are moved along the pressing direction It has a free holding spring or drive.
That is, in the press molding apparatus according to this embodiment, for example, a mold as shown in FIG. 24 may be used.

In the press molding apparatus according to this embodiment, each configuration of the press molding die according to the fifth embodiment can be preferably used.

By using the press-molding apparatus according to the present embodiment, it is possible to suppress the obstruction of the material flowing into the vertical wall portion of the press-molded product. A greater depth of drawing of the press-formed product can be obtained than in the prior art that employs notches and slits.

[Eighth Embodiment]
Next, another embodiment of the press molding apparatus of the present invention will be described.
A press molding apparatus according to the present embodiment is a mold for manufacturing a connected molded product including a plurality of connected component molding portions, and includes a plurality of punches, dies, and a holder that are spaced apart from each other. and a bending tool, wherein the die and the holder are positioned between a plurality of punches, the plurality of dies are provided separately from each other, a space is provided between the dies for inserting the bending tool, and the holder are spaced apart from each other, and a mold is provided in which a space for inserting a bending tool is provided between the holders.
A press forming apparatus according to this embodiment includes a spring portion or a driving portion that holds a die, a holder, and a bending tool movably along a pressing direction.

FIG. 32 shows a schematic cross-sectional view of a press molding device 9100 according to this embodiment.

As shown in FIG. 32, a press forming apparatus 9100 according to this embodiment includes two punches 9101, a die 9102, a holder 9103, and a bending tool 9107 which are spaced apart from each other.
Die 9102 and holder 9103 are located between two punches 9101 . Specifically, in the example of FIG. 32 , two holders 9103 are positioned between two punches 9101 and adjacent to each punch 9101 . The two holders 9103 are positioned apart from each other.

In the example of FIG. 32, two dies 9102 are positioned between two punches 9101, and the two dies 9102 are positioned to face two holders 9103, respectively. The two dies 9102 are spaced apart from each other.

A space through which a bending tool 9107 is inserted is provided between the two dies 9102 and between the two holders 9103 .

The pressing surface 9101a of the punch 9101 and the pressing surface 9103a of the holder 9103 face the same direction. The press surface 9102a of the die 9102 faces in the direction opposite to the direction in which the press surface 9101a of the punch 9101 faces.

In addition, as shown in FIG. 32, the press molding apparatus 9100 according to the present embodiment has a component molding die 9104 and a component molding holder 9105 on the side opposite to the dies 9102 and holders 9103 with respect to the plurality of punches 9101 . and furthermore.

In the example of FIG. 32, two punches 9101 have two part forming holders 9105 adjacent to each punch 9101 . In addition, the two component molding dies 9104 are positioned to face the two component molding holders 9105, respectively.

The press surface 9101a of the punch 9101 and the press surface 9105a of the component molding holder 9105 face the same direction. The pressing surface 9104a of the component forming die 9104 faces in the direction opposite to the direction in which the pressing surface 9101a of the punch 9101 faces.

As shown in FIG. 32, in the press molding device 9100 according to this embodiment, the punch 9101 is directly connected to the first fixing portion 9110 and does not move in the pressing direction. The die 9102 is connected to the second fixing portion 9120 via the spring portion 9132 . The holder 9103 is connected to the first fixing part 9110 via the spring part 9133 . Also, the part forming die 9104 is connected to the second fixing portion 9120 via the spring portion 9134 . The component molding holder 9105 is connected to the first fixing portion 9110 via the spring portion 9135 .

In addition, in the press forming apparatus 9100 according to this embodiment, the bending tool 9107 is connected to the second fixed portion 9120 via the spring portion 9137 . Also, the stopper 9112 is directly connected to the first fixing portion 9110 so as not to move in the pressing direction.

The movement of the mold in the press molding apparatus 9100 according to this embodiment may be the same movement as that of the mold described in the sixth embodiment.

Next, an example of a method of performing press molding using the press molding apparatus 9100 according to this embodiment will be described.

A metal plate can be preferably used as a workpiece for the press molding die according to the present embodiment.
First, the metal plate 12 is placed inside the press molding device 9100 .
At this time, the bending tool 9107 is positioned between the two dies 9102 .

Next, as shown in FIG. 33, by bringing the first fixing portion 9110 and the second fixing portion 9120 relatively close to each other, the die 9102 and the component molding die 9104 are moved with respect to the holder 9103 and the component molding holder 9105. The metal plate 12 is sandwiched between the press surface 9102a of the die 9102 and the press surface 9103a of the holder 9103 and held. Also, the metal plate 12 is sandwiched and held between the pressing surface 9104a of the component molding die 9104 and the pressing surface 9105a of the component molding holder 9105 .

The metal plate 12 may be held by the die 9102, the holder 9103, the part forming die 9104, and the part forming holder 9105 with such a force that the out-of-plane movement of the metal plate 12 is suppressed.

The bending tool 9107 may also be brought relatively close to the holder 9103 and the part forming holder 9105 together with the die 9102 and the part forming die 9104, but this is not essential.

Next, as shown in FIG. 34, by bringing the first fixing portion 9110 and the second fixing portion 9120 relatively close to each other, the bending tool 9107 is pressed against the metal plate 12 to bend the metal plate 12 out of its plane. It protrudes in the direction (the direction toward the punch 9101).
In the press forming apparatus according to this embodiment, the repulsive force of the spring portion 9137 of the bending tool 9107 is greater than the bending load of the metal plate 12 , so the metal plate 12 can be bent by the bending tool 9107 .

A stop 9112 limits the movement of the bending tool 9107 at a predetermined position.
This projecting portion may be called a bent portion. Also, the metal plate 12 in this state may be referred to as a press-molding blank. Moreover, the shape of the metal plate 12 in this state may be the same shape as the press-molding blank according to the first embodiment described above.

Next, by bringing the first fixing portion 9110 and the second fixing portion 9120 closer together, the punch 9101 is moved toward the die 9102 and the part forming die 9104 in the direction toward the die 9102 and the part forming die 9104. move relative to it. Through this process, a portion of the metal plate 12 is deformed in the out-of-plane direction of the metal plate 12 . A portion of the metal plate 12 is deformed in the out-of-plane direction of the metal plate 12, and at the same time, the bent portion formed by the bending tool 9107 is deformed.

In the press forming apparatus according to this embodiment, the repulsive force of the spring portion 9132 of the die 9102 and the spring portion 9134 of the part forming die 9104 is greater than the bending load of the metal plate 12, and the spring portion 9133 of the holder 9103 And the repulsive force of the spring portion 9135 of the component forming holder 9105 is larger than the sum of the repulsive force of the spring portion 9132 of the die 9102 and the component forming die 9104 and the bending load of the metal plate 12 . Therefore, a part of the metal plate 12 is deformed in the out-of-plane direction of the metal plate 12 by the punch 9101 , the die 9102 , the holder 9103 , the part forming die 9104 and the part forming holder 9105 . This deformation is a so-called drawing deformation.

In this step, the spring portion 9137 of the bending tool 9107 contracts as the bent portion formed by the bending tool 9107 is deformed (bending back of the bending deformed portion), and the direction in which the bending tool 9107 deforms the metal plate 12 is changed. may retreat in the opposite direction.
FIG. 35 is a schematic cross-sectional view for explaining the state of press forming apparatus 9100 when the mold reaches the bottom dead center position.
By the movement of the press molding apparatus 9100 as described above, a connected molded product 1900 including a plurality of molded part parts 1910 connected via connecting parts 1903 as shown in FIG. 35 is manufactured.

The press forming apparatus 9100 described above has the advantage that the distance (die height) between the first fixing portion and the second fixing portion is small and the load state is stable.

FIG. 36 shows a schematic cross-sectional view of a press molding device 9200 according to another example of this embodiment.
As shown in FIG. 36, the press forming device 9200 includes two punches 9201, a die 9202, a holder 9203, and a bending tool 9207 which are spaced apart from each other.

Die 9202 and holder 9203 are located between two punches 9201 . Specifically, in the example of FIG. 36, two holders 9203 are positioned apart from each other, and two dies 9202 are positioned to face the two holders 9203 respectively. The two dies 9202 are spaced apart from each other.

A space through which a bending tool 9207 is inserted is provided between the two dies 9202 and between the two holders 9203 .

The pressing surface 9201a of the punch 9201 and the pressing surface 9203a of the holder 9203 face the same direction. The press surface 9202a of the die 9202 faces in the direction opposite to the direction in which the press surface 9201a of the punch 9201 faces.

In addition, as shown in FIG. 36, the press molding apparatus 9200 according to the present embodiment has a component molding die 9204 and a component molding holder 9205 on the opposite side of the plurality of punches 9201 from the dies 9202 and holders 9203. and furthermore.

In the example of FIG. 36, there are two component-forming holders 9205, and two component-forming dies 9204 are positioned to face the two component-forming holders 9205, respectively.

A press surface 9201a of the punch 9201 and a press surface 9205a of the component molding holder 9205 face the same direction. The pressing surface 9204a of the component forming die 9204 faces in the direction opposite to the direction in which the pressing surface 9201a of the punch 9201 faces.

As shown in FIG. 36, in the press molding device 9200 according to this embodiment, the punch 9201 is directly connected to the first fixing portion 9210 and does not move in the pressing direction. Die 9202 is connected to second fixing portion 9220 via spring portion 9232 . The holder 9203 is connected to the first fixing part 9210 via the spring part 9233 . Also, the part forming die 9204 is connected to the second fixing portion 9220 via the spring portion 9234 . The component molding holder 9205 is connected to the first fixing portion 9210 via the spring portion 9235 .

Further, in the press forming apparatus 9200 according to this embodiment, the bending tool 9207 is connected to the first fixing portion 9210 via the spring portion 9237 . Also, the stopper 9212 is directly connected to the second fixing portion 9220 so as not to move in the pressing direction.

In addition, in the press forming apparatus 9200 according to the present embodiment, the pressing surface 9203a of the holder 9203, the pressing surface 9205a of the component molding holder 9205, and the tip portion 9207b of the bending tool 9207 are positioned second higher than the pressing surface 9201a of the punch 9201. It is located on the fixed part 9220 side.

The movement of the mold in the press molding apparatus 9200 according to this embodiment may be the same movement as that of the mold described in the sixth embodiment.

Next, an example of a method of performing press molding using the press molding apparatus 9200 according to this embodiment will be described.

A metal plate can be preferably used as a workpiece for the press molding die according to the present embodiment.
First, the metal plate 13 is placed inside the press molding device 9200 . At this time, the bending tool 9207 is positioned between the two holders 9203 .

Next, as shown in FIG. 37, by bringing the first fixing portion 9210 and the second fixing portion 9220 relatively close to each other, the die 9202 and the component molding die 9204 are moved with respect to the holder 9203 and the component molding holder 9205. The metal plate 13 is sandwiched between the press surface 9202a of the die 9202 and the press surface 9203a of the holder 9203 and held. Further, the metal plate 13 is sandwiched and held between the pressing surface 9204a of the component molding die 9204 and the pressing surface 9205a of the component molding holder 9205 .

The metal plate 13 may be held by the die 9202, the holder 9203, the part forming die 9204, and the part forming holder 9205 with such a force as to suppress the movement in the out-of-plane direction.

Next, as shown in FIG. 38, by bringing the first fixing portion 9210 and the second fixing portion 9220 relatively close to each other, the bending tool 9207 is pressed against the metal plate 13 to bend the metal plate 13 out of its plane. Protrude in the direction (the direction toward the die 9202).

In the press forming apparatus according to this embodiment, the repulsive force of the spring portion 9237 of the bending tool 9207 is greater than the bending load of the metal plate 13 , so the metal plate 13 can be bent by the bending tool 9207 .

A stop 9212 limits the movement of the bending tool 9207 at a predetermined position.
This projecting portion may be called a bent portion. Also, the metal plate 13 in this state may be referred to as a press-molding blank. Moreover, the shape of the metal plate 13 in this state may be the same shape as the press-molding blank according to the first embodiment described above.

Next, by bringing the first fixing portion 9210 and the second fixing portion 9220 relatively close to each other, the punch 9201 is moved toward the die 9202 and the part forming die 9204 in the direction toward the die 9202 and the part forming die 9204. move relative to it. Through this process, a portion of the metal plate 13 is deformed in the out-of-plane direction of the metal plate 13 . A portion of the metal plate 13 is deformed in the out-of-plane direction of the metal plate 13, and at the same time, the bent portion formed by the bending tool 9207 is deformed.

In the press forming apparatus according to this embodiment, the repulsive force of the spring portion 9232 of the die 9202 and the spring portion 9234 of the part forming die 9204 is greater than the bending load of the metal plate 13, and the spring portion 9233 of the holder 9203 And the repulsive force of the spring portion 9235 of the component molding holder 9205 is greater than the bending load of the metal plate 13 . Therefore, a portion of the metal plate 13 is deformed in the out-of-plane direction of the metal plate 13 by the punch 9201 , the die 9202 , the holder 9203 , the part forming die 9204 and the part forming holder 9205 . This deformation is a so-called drawing deformation.

In this step, the spring portion 9237 of the bending tool 9207 contracts along with the deformation of the bent portion formed by the bending tool 9207 (bending back of the bending deformed portion), and the direction in which the bending tool 9207 deforms the metal plate 13 is changed. may retreat in the opposite direction.

FIG. 39 is a schematic cross-sectional view for explaining the state of the press molding device 9200 when the mold reaches the bottom dead center position.
By the movement of the press molding device 9200 as described above, a connected molded product 2900 including a plurality of component molded parts 2910 connected via connecting parts 2903 as shown in FIG. 39 is manufactured.

The press-forming apparatus 9200 described above has the advantage that the minimum value of the holder load required for press-forming may be about the same as the bending load of the metal plate that is the work material.

In the seventh embodiment and the eighth embodiment described above, the mold provided with the spring portion was described as an example, but instead of each spring portion, a driving portion may be provided. Like the spring portion, the drive portion may be any device that holds the die, holder, or bending tool movably along the pressing direction, and may be a hydraulic cylinder or an actuator.

An example has been described in which, when the bending tool is held by the spring portion, it retreats following the deformation of the bending portion of the press-forming blank during the forming of the component forming portion. However, when the bending tool is held by the driving portion, it may be retracted following the deformation of the bent portion of the press-forming blank when forming the part forming portion, but after forming the bent portion and The bent portion may be retracted before forming the part forming portion. This operation may also be carried out by further providing an independently movable third fixed part which holds the bending tool via the spring part.

In each of the above-described embodiments, the phrase "between punches" means a space between a plurality of punches in a plan view of the punches in a direction perpendicular to their pressing surfaces.

In each of the above-described embodiments, the metal plate may be a metal plate such as a steel plate, an aluminum alloy plate, a magnesium alloy plate, or a composite material thereof. Alternatively, a composite material in which a glass fiber reinforced resin material such as FRP or FRTP is connected to these metal plates may be used.

In the description of each of the above-described embodiments, the part forming part and the press-formed product were explained by taking a simple cup shape as an example. However, the molded part or press-formed product may have a more complicated shape, and drawing, bending, extruding, cutting, twisting, heating, or , cooling, heat insulation, plating, and the like may be further applied.

Can be manufactured by employing the press-molding blank, press-molding blank manufacturing method, connected molded product manufacturing method, press-molded product manufacturing method, press-molding mold, and press-molding apparatus according to the present invention. It is industrially very useful because it can achieve both range and productivity.

100, 200, 300, 400, 500, 600, 700, 900, 1000, 1100 press molding blanks 101, 201, 301, 401, 501, 601, 701, 901, 1001, 1101 parts to be molded 102, 202, 302, 402, 502, 602, 702, 902, 1002, 1102 bending portions 103, 203, 303, 903, 1003, 1103 connecting portions 104, 404, 504, 604, 704 protruding portions

Claims (12)

A press-molding blank made of a metal plate,
Having a bending portion between a plurality of parts to be molded,
The bending portion protrudes in an out-of-plane direction of the press-molding blank ,
The bending part is
a flat portion adjacent to the part-to-be-molded portion;
a first ridge line adjacent to the flat portion;
a rising portion connected to the flat portion via the first ridgeline and protruding in an out-of-plane direction of the press-molding blank;
a projecting portion having a second ridge connecting the rising portions;
including
The rising portion is substantially perpendicular to the flat portion,
In a cross-sectional view of a plane including the plurality of parts to be molded and the bending part,
The length obtained by subtracting the distance between the first ridge lines from the length of the protruding portion is the length of the vertical wall closest to the bend forming portion of the plurality of component forming portions to be formed in the plurality of component forming portions. is greater than or equal to the total length of the length,
A blank for press molding characterized by: A method for manufacturing a blank for press molding according to claim 1 ,
A method of manufacturing a blank for press molding, comprising a step of projecting a metal plate in an out-of-plane direction to form a bent portion between a plurality of parts to be molded. 2. The press-molding blank according to claim 1 , wherein the plurality of part-to-be-molded portions of the press-molding blank in which the bending portion protrudes in an out-of-plane direction of the press-molding blank are A method for manufacturing a connected molded product, characterized by including a part forming step of deforming the bent portion in the out-of-plane direction of the. A method for manufacturing a connected molded product using the press molding blank according to claim 1,
a preforming step in which the metal plate protrudes in the out-of-plane direction to form a bent portion between a plurality of parts to be formed;
and a part forming step of deforming the plurality of parts to be molded in an out-of-plane direction of the metal plate and deforming the bent part. In the part molding process,
3. The connecting portion is formed by forming the part forming portion in the part to be formed by drawing, and deforming the bending portion so that the depth of the bending portion becomes small. 5. The method for manufacturing the connected molded product according to 4 . Manufacture of a press-formed product characterized by comprising a dividing step of cutting the connecting portion of the connected molded product obtained by the method for manufacturing a connected molded product according to claim 5 to divide the component molded portions. Method. A mold for manufacturing a connected molded product including a plurality of connected parts forming parts using the press-molding blank according to claim 1 ,
a plurality of punches spaced apart from each other;
dice and
comprising a holder and
the die and the holder are positioned between the plurality of punches;
A mold for press molding, wherein a plurality of said dies or said holders are provided and are spaced apart from each other. A mold for manufacturing a connected molded product including a plurality of connected parts forming parts using the press-molding blank according to claim 1 ,
a plurality of punches spaced apart from each other;
dice and
comprising a holder and
the die and the holder are positioned between the plurality of punches;
A die for press molding, wherein the die or the holder is provided with a slit. A mold for manufacturing a connected molded product including a plurality of connected parts forming parts using the press-molding blank according to claim 1 ,
a plurality of punches spaced apart from each other;
dice and
a holder;
a bending tool;
the die and the holder are positioned between the plurality of punches;
There are a plurality of the dies spaced apart from each other, a space for inserting the bending tool is provided between the dies, a plurality of the holders are spaced apart from each other, and the A press molding die characterized by having a space through which a bending tool is inserted. on the side opposite to the die and the holder with respect to the plurality of punches,
a part forming die;
The press-molding die according to any one of claims 7 to 9, further comprising a part-molding holder. A press molding device comprising the mold according to claim 7 or 8 ,
A press molding apparatus comprising a spring portion or a driving portion that holds the die and the holder movably along the pressing direction. A press molding apparatus comprising the mold according to claim 9 ,
A press forming apparatus comprising a spring portion or a driving portion that holds the die, the holder and the bending tool movably along the pressing direction.

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