CN107635684B - Impact forming method and punch-forming mold - Google Patents
Impact forming method and punch-forming mold Download PDFInfo
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- CN107635684B CN107635684B CN201680030671.XA CN201680030671A CN107635684B CN 107635684 B CN107635684 B CN 107635684B CN 201680030671 A CN201680030671 A CN 201680030671A CN 107635684 B CN107635684 B CN 107635684B
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- punch
- skew wall
- forming
- plate
- wall portion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
- B21D22/26—Deep-drawing for making peculiarly, e.g. irregularly, shaped articles
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The present invention relates to a kind of impact forming methods, it is used to mold products of press forming by punch-pin (3) and cavity plate (5), the products of press forming includes top plate portion and the skew wall portion that is connected at least side of top plate portion, when looking down skew wall portion on the length direction of products of press forming to skew wall portion lateral bend at convex shape, the impact forming method includes: first step, and being equivalent in the state that the position in skew wall portion abuts in making cavity plate shoulder and plate (9) relatively moves cavity plate (5) to punch-pin (3) side to be formed；Second step, by the position for being located at end side than being equivalent to the position in skew wall portion in cavity plate (5) and punch-pin (3) clamping plate (9)；And third step, it relatively moves cavity plate (5) until forming lower dead center to punch-pin (3) side and molds skew wall portion.
Description
Technical field
The present invention relates to punch forming (press forming) method and punch-forming mold (tool of press
Forming), in particular to a kind of rushing in the middle generation for inhibiting fold (wrinkles) of extrusion forming (crash forming)
Transfer moulding method and punch-forming mold.
Background technique
In recent years, body lightening (weight reduction of automotive is made to correspond to environmental problem
Body), high-strength steel sheet (high-strength steel sheet) is used for automobile component more and more
(automotive part).In the manufacture of automobile component, the lower punch forming of manufacturing cost is mostly used.But it is high-intensitive
Steel plate poor ductility compared with the lower steel plate of intensity.Therefore, passing through fixed device (blank holder) control panel of plate
Expect the end of (blank) and applies in the deep drawing molding (deep drawing) of pressure-pad-force (blank holder force),
The end of plate can nearby generate the biggish fracture (material for straining (strain) and being easy to cause material
fracture).Therefore, in high-strength steel sheet, application is without using the bending process of the fixed device of plate in most cases
Extrusion forming based on (bending deformation).But be applied in extrusion forming the drawing force of steel plate compared with
It is weak.Therefore, because excess material (excess metal) caused by component shape easily become fold generation directly will be because, it is difficult to
Obtain the products of press forming of target shape.
Patent document 1 discloses using punch process the manufacturing method for manufacturing L shape product.According to this method, by making
With blank holder (pad) Lai Jinhang punch process, can be avoided the generation of fold at the roof (upper wall) of L shape product,
And the fracture (fracture) in extension flange molding (stretch flange forming).
Patent document 2, which discloses not making to manufacture with generating fold at longitudinal wall (side wall), has circular arc in corner
The method of the component at shape position.This method includes the intermediary form product (preformed that manufacture does not mold arc-shaped position
Part) the step of and go out arc-shaped position from the intermediary form product drawing and forming made of the step to complete corner
The step of, by the way that 1 since the edge side of flange portion (flange portion) is arranged in the part for not arriving arc-shaped position
A above notch, can be avoided the generation of fold.
Patent document 3 is disclosed metal plate (metal sheet) material bending process into hat section (hat-shaped
Cross section), and compressing force is applied to the longitudinal wall part of metal plate material immediately after bending process completion
The stamping die (tool of press forming) of (compressive stress).
Patent document 1: International Publication No. 2012/070623
Patent document 2: Japanese Patent Publication 6-47135 bulletin
Patent document 3: Japanese Unexamined Patent Publication 2005-254279 bulletin
Summary of the invention
In the existing method for inhibiting fold to generate in punch forming, there are as below methods: use and press machine (press
Forming machine) different dynamic blank holder mechanism, in advance to can generate fold position apply pressing plate load
(load), thus, it is possible to prevent because of excess stock caused by plate buckling (buckling).But although this method can fit
For on the component that punch forming initial stage can be clamped by punch-pin (punch) and pressing plate, but the mechanism can not be suitable for
There is skew wall portion (the inclined wall at inclination angle relative to the driving direction (punch forming direction) of press machine
portion)。
The manufacturing method for the L shape product based on punch process recorded in patent document 1 is to clamp plate by punch-pin and pressing plate
Material, maintains the height of pressing plate constant, thus the upper wall bending section (arched portion) of L shape product is inhibited nearby to generate pleat
Wrinkle.But this method is only able to suppress and generates fold in product upper wall, and can not be suitable for inhibiting in products of press forming
Skew wall portion generates fold.
The method recorded in patent document 2 exists in productivity due to the manufacture of component at least needs two processes to be lacked
It falls into.In addition, needing that notch (incision) is arranged in plate, therefore there are shapes and original in method described in Patent Document 2
Originally the dramatically different problem of the article shape to be obtained.
The stamping die recorded in patent document 3, being installed on the outstanding of upper mold in a manner of it can slide (sliding)
It hangs sliding block (suspended slider), moves the upper press-bending blade (bending blade) of cavity plate (die) horizontally,
It clamps the upper half of the longitudinal wall part of products of press forming and squeezes lower half to compress longitudinal wall part.However, to locate in the application
Reason has in the alongst punch forming of the component in curved skew wall portion, above-mentioned skew wall during bending machining
The bending curvature (curvature) in portion changes.Therefore, it is necessary to make the shape of the upper press-bending blade of above-mentioned stamping die with it is curved
Bending curvature in bent process correspondingly changes.But in stamping die described in Patent Document 3, pressure can not be made
The shape of bent blades changes during bending machining.Therefore, it is impossible to be made using stamping die described in Patent Document 3
Make the products of press forming with the skew wall portion for bending to convex shape.
The present invention completes in view of the above problems, and its purpose is to provide a kind of impact forming method and punch forming modules
Tool does not need that notch is arranged in plate, and mold by a process in the punch forming of products of press forming
Skew wall portion is stated, so as to inhibit to generate fold in the skew wall portion, wherein above-mentioned products of press forming includes top plate portion (top
Portion) and at least side of the top plate portion it is connected and does not have the skew wall portion of flange in front end, when looking down the skew wall
The whole or part in portion is on the length direction of products of press forming to above-mentioned skew wall portion lateral bend at convex shape.
The present invention relates to a kind of impact forming method, it is used to mold punching by concave cavity plate and the punch-pin of convex
Molded product, the products of press forming include top plate portion and are connected at least side of the top plate portion and do not have in front end
The skew wall portion of flange, the whole or part in the skew wall portion is on the length direction of products of press forming to above-mentioned oblique when looking down
Wall portion lateral bend includes: first step at convex shape, above-mentioned impact forming method, in the cavity plate shoulder for making above-mentioned cavity plate
(shoulder portion) makes above-mentioned cavity plate to above-mentioned in the state of abutting with the position for being equivalent to above-mentioned skew wall portion in plate
Punch-pin side relatively moves to carry out extrusion forming；Second step is clamped in above-mentioned plate by above-mentioned cavity plate and above-mentioned punch-pin and compares phase
When the position in above-mentioned skew wall portion is located at the position of end side；And third step, the shape at the position for clamping above-mentioned end side
Make above-mentioned cavity plate to the relative movement of above-mentioned punch-pin side until forming lower dead center (bottom dead center) under state, to form
Above-mentioned skew wall portion out.
Impact forming method of the present invention in the present invention as stated above, at least in above-mentioned first step, including with pressing plate
The step of pushing down the position that above-mentioned top plate portion is equivalent in above-mentioned plate.
It the present invention relates to a kind of punch-forming mold, is used to mold products of press forming, the products of press forming packet
It includes top plate portion and is connected at least side of the top plate portion and there is no the skew wall portion of flange in front end, when looking down the skew wall
The whole or part in portion is on the length direction of products of press forming to above-mentioned skew wall portion lateral bend at convex shape, above-mentioned punching press
Molding die has: punch-pin comprising: the roof formed portion of above-mentioned top plate portion is molded for loading plate, for forming
The skew wall forming part in above-mentioned skew wall portion and the punch-pin side fastener (locking being connected with the skew wall forming part out
portion)；And cavity plate comprising: skew wall forming part co-operating with above-mentioned punch-pin molds above-mentioned punch forming system
The skew wall forming part in the skew wall portion of product and the cavity plate side fastener being connected with the skew wall forming part, above-mentioned punch-pin side fastener
And above-mentioned cavity plate side fastener is the parallel walls parallel with punch forming direction respectively, can be clamped before bottom dead center in molding above-mentioned
The position for being located at end side than being equivalent to the position in above-mentioned skew wall portion in plate.
Punch-forming mold of the present invention in the present invention as stated above, has: pressing plate, comes with above-mentioned punch-pin co-operating
Push down at least part that the position of above-mentioned top plate portion is equivalent in above-mentioned plate.
The impact forming method and punch-forming mold being related to according to the present invention, in the punch forming of products of press forming
In, it does not need that notch is arranged in plate, and above-mentioned skew wall portion can be molded by a process, so as to inhibit at this
Skew wall portion generate fold, wherein the products of press forming include top plate portion and be connected at least side of the top plate portion and
Front end does not have the skew wall portion of flange, and the whole or part in the skew wall portion is on the length direction of products of press forming when looking down
To above-mentioned skew wall portion lateral bend at convex shape.
Detailed description of the invention
Fig. 1 is the explanatory diagram for the punch-forming mold that embodiments of the present invention are related to.
Fig. 2 is the perspective view of products of press forming of the present invention.
Fig. 3 is the explanatory diagram of now shaped punch-forming mold.
Fig. 4 is for illustrating to carry out punch forming system obtained from extrusion forming using existing shaped punch-forming mold
The figure of the problem of product.
Fig. 5 is the explanatory diagram for illustrating impact forming method that embodiments of the present invention are related to.
Fig. 6 is the perspective view as the products of press forming of object in embodiment.
Fig. 7 is the perspective view of the punch-forming mold of the example of the present invention used in embodiment.
Fig. 8 is the forming process indicated when being formed in embodiment using the punch-forming mold of example of the present invention
Figure.
Fig. 9 is products of press forming obtained from being formed in embodiment using the punch-forming mold of example of the present invention
Perspective view.
Figure 10 is the solid of plate obtained from being formed in embodiment using now shaped punch-forming mold
Figure.
Symbol description
1 punch-forming mold
3 punch-pin
3a roof formed portion
3b skew wall forming part
3c punch-pin side fastener
5 cavity plates
5b skew wall forming part
5c cavity plate side fastener
7 pressing plates
9 plates
11 punch-forming molds (existing shape)
13 punch-pin
13b skew wall forming part
15 cavity plates
15b skew wall forming part
21 punch-forming molds (example of the present invention)
23 punch-pin
23a roof formed portion
23b skew wall forming part
23c punch-pin side fastener
25 cavity plates
25b skew wall forming part
25c cavity plate side fastener
41 products of press forming
43 top plate portions
45 skew wall portions
47 interconnecting pieces
49 folds
Specific embodiment
As shown in Fig. 2, the impact forming method that embodiments of the present invention are related to is by punch-pin with convex and recessed
For the punch-forming mold of the cavity plate of shape by the molding method of products of press forming 41, which includes top plate portion
43 and it is connected at least side of top plate portion 43 and does not have the skew wall portion 45 of flange in front end, when looking down skew wall portion 45
Whole or part is along the length direction of products of press forming 41 and to 45 lateral bend of skew wall portion at convex shape.As for being somebody's turn to do
One example of the above-mentioned punch-forming mold of impact forming method, there is punch-forming mold 1 shown in FIG. 1.
In the following, before illustrating impact forming method and punch-forming mold 1 of the present embodiment, first to this hair
The bright middle products of press forming 41 as molding object is illustrated.In addition, in the following description, to identical structural element
Mark identical symbol.
Products of press forming
As shown in Fig. 2, in the present embodiment, the products of press forming 41 as stamping forming target shape includes top
Plate portion 43 and it is connected at least side of top plate portion 43 and does not have the skew wall portion 45 of flange in front end, when looking down skew wall portion
45 whole or part is along the length direction of products of press forming 41 and to 45 lateral bend of skew wall portion at convex shape.Skew wall portion
45 are connected by interconnecting piece 47 with top plate portion 43, make cavity plate 5 to 3 side phase of punch-pin relative to when forming products of press forming 41
There is tiltangleθ to mobile direction (punch forming direction).
Extrusion forming is being wanted to go out punch forming shown in Fig. 2 using existing shaped punch-forming mold 11 shown in Fig. 3
When product 41, sometimes as shown in figure 4, being received when the tilt length S in the skew wall portion 45 of products of press forming 41 is some value or more
The front end that contracting deformation (shrink deformation) concentrates on skew wall portion 45 generates fold 49 in skew wall portion 45.Such
In the case where generating fold 49, the bending curvature that will do it the convex for making products of press forming 41, the company being connected with top plate portion 43
The punch-pin shoulder radius of socket part 47 or the tilt length S in skew wall portion 45 such as become smaller at the change to component shape.
Punch-forming mold
As shown in Figure 1, punch-forming mold 1 of the present embodiment has: punch-pin 3 comprising for loading plate 9
Come mold the roof formed portion 3a of top plate portion 43, the skew wall forming part 3b for molding skew wall portion 45 and with skew wall at
Type portion 3b connected punch-pin side fastener 3c；And cavity plate 5 comprising the skew wall forming part 3b co-operating with punch-pin 3 comes into
The cavity plate side locking that type goes out the skew wall forming part 5b in the skew wall portion 45 of products of press forming 41 and is connected with skew wall forming part 5b
Portion 5c.
Punch-pin side fastener 3c and cavity plate side fastener 5c is respectively and punch forming direction (driving direction of press machine)
Parallel parallel walls can clamp before bottom dead center in above-mentioned plate in molding and be located at end than being equivalent to the position in above-mentioned skew wall portion
The position of side.Here, by the way that the gap between punch-pin side fastener 3c and cavity plate side fastener 5c to be set as to the plate thickness journey of plate 9
Degree, molding on the way by punch-pin side fastener 3c and cavity plate side fastener 5c can co-operating and clamp in plate 9 than suitable
It is located at the position of end side in the position in skew wall portion 45.In addition, until molding in the state of clamping the position of above-mentioned end side
It is formed until lower dead center, thus, it is possible to be inhibited to generate the punch forming system of the target shape of fold in skew wall portion 45
Product 41.
Impact forming method
Impact forming method of the present embodiment is for example formed using punch-forming mold 1 shown in FIG. 1, packet
Include: first step relatively moves cavity plate 5 to 3 side of punch-pin to carry out extrusion forming；Second step clamps in plate 9 than suitable
It is located at the position of end side in the position in skew wall portion 45；And third step, in the state of clamping the position of above-mentioned end side
Make cavity plate 5 further to the relative movement of 3 side of punch-pin until forming lower dead center, to mold the skew wall portion of products of press forming 41
45.In the following, above steps is described in detail referring to Fig. 5.
First step
First step is the roof formed portion 3a that plate 9 is placed in punch-pin 3, make cavity plate 5 (such as cavity plate shoulder) with
It is equivalent in plate 9 in the state of the position abutting in skew wall portion 45 to the relative movement of 3 side of punch-pin, Lai Jinhang plate 9 is squeezed into
The step of type ((a) to (b) of Fig. 5).
When abutting cavity plate 5 to carry out extrusion forming with plate 9, as shown in (b) of Fig. 5, plate 9 is oblique with punch-pin 3
Wall forming part 3b is not abutted, and generates flexure (deflection).The flexure uses tensile strength (tensile in plate 9
Strength) larger in the case where higher steel plate, it is being the high intensity of 980MPa grade (class) or more using tensile strength
It is especially significant in the case where steel plate.
Second step
Second step is before the molding lower dead center after the first step for carrying out extrusion forming, by punch-pin side fastener
3c and the fastener 5c co-operating of cavity plate side clamp the position for being located at end side than being equivalent to the position in skew wall portion 45 in plate 9
The step of ((c) of Fig. 5).As described above, plate 9 generates flexure in the first step, thus the skew wall of plate 9 and punch-pin 3 at
There is no abutting, the position of the above-mentioned end of plate 9 is clamped type portion 3b by punch-pin side fastener 3c and cavity plate side fastener 5c.
Third step
Third step is in the above-mentioned end side by punch-pin side fastener 3c and cavity plate side fastener 5c clamping plate 9
In the state of, so that cavity plate 5 is further obtained products of press forming 41 until forming lower dead center to the relative movement of 3 side of punch-pin
The step of target shape ((d) of Fig. 5).
Pass through the state in the above-mentioned end side for clamping plate 9 by punch-pin side fastener 3c and cavity plate side fastener 5c
Under formed, buckling occurs on plate thickness direction for the flexure that plate 9 will not be made to generate, but is formed by the skew wall of cavity plate 5
The skew wall forming part 3b of portion 5b and punch-pin 3 presses plate 9 to mold skew wall portion 45 (Fig. 2).
In the following, impact forming method and punch-forming mold 1 that the embodiment of explanation through the invention is related to can press down
System is the reasons why skew wall portion 45 generates fold.
As described above, being manufactured using existing shaped punch-forming mold 11 shown in Fig. 3 by extrusion forming
When products of press forming 41, sometimes as shown in Figure 4 near the front end in skew wall portion 45 generate fold 49.
The fold 49 is due to generating biggish compression strain (compressive strain) and not in forming process
Buckling is occurred on plate thickness direction by the end of the plate 9 of adjacent material limitation and is generated.Therefore, it may be considered that forming
Occur to limit out-of-plane deformation of the end on plate thickness direction before buckling on plate thickness direction in the end of plate 9 in journey
(off-plane deformation), thus, it is possible to inhibit to generate fold 49 in skew wall portion 45.
In punch-forming mold 1 of the present embodiment, as right in order not to which buckling occurs on plate thickness direction
The shape for the mode that the position for being located at end side than the position that is equivalent to skew wall portion 45 in plate 9 is limited on plate thickness direction
State can have punch-pin 3 and cavity plate 5 to be respectively provided with as the parallel walls parallel with punch forming direction as shown in Figures 1 and 5
Punch-pin side fastener 3c and cavity plate side fastener 5c.
By making punch-pin side fastener 3c and cavity plate side fastener 5c both sides are parallel with punch forming direction parallel
Wall, even if the relative position of cavity plate 5 and punch-pin 3 changes after second step, punch-pin side fastener 3c and cavity plate side card
Gap between stop 5c is also able to maintain unchangeably, is formed until forming lower dead center.
Also, pass through the plate thickness journey that the gap between punch-pin side fastener 3c and cavity plate side fastener 5c is set as to plate 9
Degree clamps the position of the above-mentioned end side of plate 9 by punch-pin side fastener 3c and cavity plate side fastener 5c come on plate thickness direction
It is limited, can prevent that buckling occurs on plate thickness direction.
By the position of the above-mentioned end side of the punch-pin side fastener 3c and cavity plate side fastener 5c plate 9 clamped, Neng Goutong
The rear classes process such as integer (restrike) or deburring (trim) is crossed to be readily removable.
In addition, the punch-forming mold 1 in Fig. 1 and Fig. 5 has a pressing plate 7 of the upper surface for pushing down plate 9, but
It is also possible to do not have mold of the pressing plate 7 to mold products of press forming 41 in embodiments of the present invention.In such case
Under, the preferred roof formed portion (not shown) that has the top plate portion 43 for molding products of press forming 41 of cavity plate 5.
But in impact forming method of the present embodiment, preferably punch-forming mold 1 has pressing plate 7, and extremely
It is few to push down the upper surface of plate 9 with pressing plate 7 to be formed in the first step.
This be in order to, in forming process, pushed down by pressing plate 7 be placed in the upper surface of the plate 9 of roof formed portion 3a Lai
It prevents plate 9 from shifting (displacement), thus makes to be located at end side than being equivalent to the position in skew wall portion 45 in plate 9
Position of the position on punch forming direction do not change, thus in the second step can by punch-pin side fastener 3c and
Cavity plate side fastener 5c reliably clamps the position of above-mentioned end side in defined position.
In addition, impact forming method of the present embodiment is not limited to engage using punch-pin side fastener 3c and cavity plate side
Portion 5c, as long as the position position in plate 9 than being equivalent to skew wall portion 45 can be clamped by punch-pin 3 and cavity plate 5 on the way in molding
In the position of end side, then it is also possible to other forms.For example, it can be the punch-pin sides that is equivalent to of punch-pin 3 or cavity plate 5 to engage
A part of portion 3c or cavity plate side fastener 5c move on the way in molding, to clamp the end of the plate 9 of molding on the way.
Embodiment
In order to confirm the function and effect of impact forming method and punch-forming mold of the present invention, it is real verifying has been carried out
It tests.In the following, explaining its result.
As shown in fig. 6, in the present embodiment, using products of press forming 41 as object, demonstrating in products of press forming
Whether 41 skew wall portion 45 generates fold, which includes top plate portion 43, is connected with the side of top plate portion 43
Skew wall portion 45, the whole or part in skew wall portion 45 is along the length direction of products of press forming 41 and to skew wall portion when looking down
45 lateral bends are at convex shape.
The size of products of press forming 41 is: the punch-pin shoulder radius R of connection top plate portion 43 and the interconnecting piece 47 in skew wall portion 45
For 7mm, the tilt angle theta that the short transverse of skew wall portion 45 and products of press forming 41 is formed is 30 °, the convex shape in skew wall portion 45
Curved radius of curvature be 1600mm, the length L on length direction is 830mm, makes the tilt length S in skew wall portion 45 in 20mm
It is changed in the range of~40mm.It is 1.2mm that plate 9 used in the molding of products of press forming 41, which has used plate thickness, anti-
Tensile strength is the steel plate of 980MPa grade.
Punch-forming mold 21 (example of the present invention) of the present invention shown in Fig. 7 and shown in Fig. 3 existing is used respectively
Shaped punch-forming mold 11 (conventional example) molds products of press forming 41, makes inclining for skew wall portion 45 in every case
Whether plagioclase degree S change, generate fold to have solved.
As shown in fig. 7, the punch-forming mold 21 in example of the present invention has: punch-pin 23 comprising roof formed portion 23a,
Skew wall forming part 23b and punch-pin side fastener 23c；And cavity plate 25 comprising cavity plate side fastener 25c and skew wall forming part
25b, punch-pin side fastener 23c and cavity plate side fastener 25c respective positions and the tilt length S in skew wall portion 45 correspondingly become
More, with the end of clamping 1mm or so range away from the front end of plate 9.
Fig. 8 is shown using punch-forming mold 21 of the present invention the case where under (example of the present invention) in forming process
Punch-forming mold 21 and plate 9 shape, Fig. 9 is shown formed until forming lower dead center obtained from punching press
The shape of moulded products 41.
In addition, Figure 10 shows the forming process in the case where using the case where showing shaped punch-forming mold 11 (conventional example)
In punch-forming mold 11 and plate 9 shape result.
Also, it is shown in table 1 and whether has produced fold in the case where changing the tilt length S in skew wall portion 45
As a result.In addition, with × indicate punch forming after the case where the end in skew wall portion 45 produces fold, use zero indicates not generate
The case where fold.
Table 1
In the prior embodiment, when the tilt length S in skew wall portion 45 is 35mm or more, fold is produced in skew wall portion 45.Such as
Shown in Figure 10, although can be equivalent in plate 9 until forming on the way the position in skew wall portion 45 with not generating fold into
Row molding, but by the skew wall forming part 13b of punch-pin 13 and the skew wall forming part 15b of cavity plate 15 to plate near molding lower dead center
The flexure of material 9 produces fold during being pressed.
In example of the present invention, it is located at end than being equivalent to the position in skew wall portion 45 due to clamping in plate 9 on the way in molding
The position (A in (c) of Fig. 8) of side, so even if the tilt length S in skew wall portion 45 be 40mm, also can skew wall portion 45 not
It is formed with generating fold, obtains result more preferably than conventional example.
More than, it demonstrates: in molding on the way by comparing in punch-pin side fastener 23c and cavity plate side fastener 25c clamping plate 9
The position for being equivalent to skew wall portion 45 is located at the position of end side, and until under molding in the state of clamping the position of the end side
It is formed until stop, thus, it is possible to inhibit to generate fold in skew wall portion 45.
In accordance with the invention it is possible to provide a kind of impact forming method and punch-forming mold, go out to strike out in punch forming
In type product, do not need that notch is arranged in plate, and above-mentioned skew wall portion can be molded by a process, so as to press down
System the skew wall portion generate fold, the products of press forming include top plate portion and be connected at least side of the top plate portion and
There is no the skew wall portion of flange in front end, when looking down length direction of the whole or part in the skew wall portion in products of press forming
On to above-mentioned skew wall portion lateral bend at convex shape.
Claims (4)
1. a kind of impact forming method is used to mold products of press forming by concave cavity plate and the punch-pin of convex,
The products of press forming includes top plate portion and is connected at least side of the top plate portion and does not have the skew wall of flange in front end
Portion, the whole or part in the skew wall portion is on the length direction of products of press forming to skew wall portion lateral bend when looking down
At convex shape, the impact forming method is characterised by comprising:
First step, in the state of the position in the skew wall portion is equivalent in the cavity plate shoulder and plate for making the cavity plate abutting
Relatively move the cavity plate to the punch-pin side to carry out extrusion forming；
Second step is clamped in the plate by the cavity plate and the punch-pin and is located at end than being equivalent to the position in the skew wall portion
The position of portion side；And
Third step, make in the state of clamping the position of the end side cavity plate to punch-pin side relative movement at
Until type lower dead center, to mold the skew wall portion.
2. impact forming method according to claim 1, it is characterised in that:
At least in the first step, the step at the position of the top plate portion is equivalent in the plate including being pushed down with pressing plate
Suddenly.
3. a kind of punch-forming mold is used to mold products of press forming, the products of press forming include top plate portion and
It is connected at least side of the top plate portion and does not have the skew wall portion of flange in front end, when looking down the entirety in the skew wall portion or one
Divide on the length direction of products of press forming to skew wall portion lateral bend into convex shape, the feature of the punch-forming mold
It is have:
Punch-pin comprising: the roof formed portion of the top plate portion is molded for loading plate, for molding the skew wall
The skew wall forming part in portion and the punch-pin side fastener being connected with the skew wall forming part；And
Cavity plate comprising: skew wall forming part co-operating with the punch-pin molds the skew wall of the products of press forming
The skew wall forming part in portion and the cavity plate side fastener being connected with the skew wall forming part,
Punch-pin side fastener and cavity plate side fastener are the parallel walls parallel with punch forming direction, Neng Gou respectively
Molding clamps the position for being located at end side than being equivalent to the position in the skew wall portion in the plate before bottom dead center.
4. punch-forming mold according to claim 3, which is characterized in that have:
Pressing plate, at least one that the position that the top plate portion is equivalent in the plate is pushed down with the punch-pin co-operating
Point.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015112321A JP6011680B1 (en) | 2015-06-02 | 2015-06-02 | Press molding method and press mold |
| JP2015-112321 | 2015-06-02 | ||
| PCT/JP2016/062469 WO2016194503A1 (en) | 2015-06-02 | 2016-04-20 | Press forming method and tool of press forming |
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| CN107635684A CN107635684A (en) | 2018-01-26 |
| CN107635684B true CN107635684B (en) | 2019-05-03 |
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| JP (1) | JP6011680B1 (en) |
| KR (1) | KR102003631B1 (en) |
| CN (1) | CN107635684B (en) |
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| JP6973236B2 (en) * | 2018-03-29 | 2021-11-24 | Ｊｆｅスチール株式会社 | Press molding method |
| WO2020105647A1 (en) * | 2018-11-19 | 2020-05-28 | 日本製鉄株式会社 | Method for manufacturing curved member |
| JP6919690B2 (en) * | 2018-12-06 | 2021-08-18 | Ｊｆｅスチール株式会社 | Manufacturing method of pressed parts and design method of lower die |
| CN114845822A (en) * | 2019-12-18 | 2022-08-02 | 日本制铁株式会社 | Method for manufacturing press-formed article, press-forming apparatus, and press-forming line |
| JP2022049566A (en) | 2020-09-16 | 2022-03-29 | 東プレ株式会社 | Method for manufacturing press-molded article, and molding die |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101745581A (en) * | 2008-11-29 | 2010-06-23 | 比亚迪股份有限公司 | Sheet bending and forming mould and method |
| CN102371309A (en) * | 2010-08-26 | 2012-03-14 | 哈尔滨建成集团有限公司 | Deep drawing forming composite die for shallow conical pieces with sunken side walls |
| CN103237611A (en) * | 2010-11-24 | 2013-08-07 | 新日铁住金株式会社 | Method for manufacturing L-shaped product |
| CN203370953U (en) * | 2013-08-06 | 2014-01-01 | 崔奎强 | Deep drawing die |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2663701B2 (en) * | 1990-10-12 | 1997-10-15 | 日産自動車株式会社 | Press mold |
| JPH0647135A (en) | 1992-07-30 | 1994-02-22 | Sophia Co Ltd | Game machine |
| JP2005254279A (en) | 2004-03-11 | 2005-09-22 | Toyota Auto Body Co Ltd | Press die |
| EP2946845B1 (en) * | 2013-01-16 | 2017-06-28 | Nippon Steel & Sumitomo Metal Corporation | Press-forming method |
| JP5664810B1 (en) * | 2013-06-27 | 2015-02-04 | Ｊｆｅスチール株式会社 | Press forming method and apparatus |
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- 2015-06-02 JP JP2015112321A patent/JP6011680B1/en active Active
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- 2016-04-20 CN CN201680030671.XA patent/CN107635684B/en active Active
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- 2016-04-20 WO PCT/JP2016/062469 patent/WO2016194503A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101745581A (en) * | 2008-11-29 | 2010-06-23 | 比亚迪股份有限公司 | Sheet bending and forming mould and method |
| CN102371309A (en) * | 2010-08-26 | 2012-03-14 | 哈尔滨建成集团有限公司 | Deep drawing forming composite die for shallow conical pieces with sunken side walls |
| CN103237611A (en) * | 2010-11-24 | 2013-08-07 | 新日铁住金株式会社 | Method for manufacturing L-shaped product |
| CN203370953U (en) * | 2013-08-06 | 2014-01-01 | 崔奎强 | Deep drawing die |
Also Published As
| Publication number | Publication date |
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| CN107635684A (en) | 2018-01-26 |
| JP6011680B1 (en) | 2016-10-19 |
| MX2017015331A (en) | 2018-03-28 |
| KR102003631B1 (en) | 2019-07-24 |
| WO2016194503A1 (en) | 2016-12-08 |
| KR20170139646A (en) | 2017-12-19 |
| JP2016221558A (en) | 2016-12-28 |
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