CN108778548A - Press-processing method - Google Patents
Press-processing method Download PDFInfo
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- CN108778548A CN108778548A CN201780017048.5A CN201780017048A CN108778548A CN 108778548 A CN108778548 A CN 108778548A CN 201780017048 A CN201780017048 A CN 201780017048A CN 108778548 A CN108778548 A CN 108778548A
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- Prior art keywords
- forming
- press
- sidewall
- flange
- formed part
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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
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/01—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments
-
- 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
- B21D53/00—Making other particular articles
- B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
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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
Press-processing method of the present invention is by the press-formed part with top plate portion, side of sidewall portion and flange portion, hat section（70）The press-processing method of forming, has：1st forming process uses the 1st mold（1）By metal blank（50）It is configured to interim molded component（60）, the 1st mold（1）With plate forming portion（11,21）, sidewall-forming parts（13,23）And Flange Forming portion（15,25）, the sidewall-forming parts（13,23）For shaping side of sidewall portion, which is in and press-formed part（70）Target shape compare the shape of chevron that the section on forming direction is protruded outward；And the 2nd forming process, use the 2nd mold（3）To interim molded component（60）It is formed, the 2nd mold（3）Have and press-formed part（70）Target shape be same shape plate forming portion（31,41）, sidewall-forming parts（33,43）And Flange Forming portion（35,45）.
Description
Technical field
The present invention relates to stamping (press forming) component (part) in the section hat shape (hat-shaped) to rush
Pressing formation method, more particularly to shape freezing (the shape freezing for inhibiting rebound (springback)
Property) excellent press-processing method.
Background technology
In recent years, in order to realize automobile (automobile) vehicle body (automotive body) from environmental problem
Lightweight (weight reduction), high-strength steel sheet (high-strength steel sheet) is just more and more
Applied to automobile component.In order to produce automobile component, the stamping of low production cost is mostly used.However, high-strength steel sheet
Compared with low intensive steel plate, it is stamping after elasticity restore (elastic recovery) (rebound) it is larger so as to lead to
The stamping component to obtain target shape is crossed to become difficult.In addition, for the purpose of the lightweight of vehicle body using steel plate
High intensity this means that plate thickness thinnedization (sheet thinning), however plate thickness it is thinner steel plate rebound it is bigger, and aggravate
Above-mentioned problem.
Therefore, for for inhibiting the exploitation of the process for stamping and forming of rebound to have strong demand.Especially, it is applying
In the automobile skeleton part (skeletal part) of high-strength steel sheet in the press-formed part of common hat section, often
" being opened outside wall portion " occurs, i.e., due to rebound, the opening width of the side of sidewall portion (side wall portion) of press-formed part
(opening width) is deformed into the opening width than target shape and opens to obtain bigger, and inhibits outside the wall portion caused by springing back
It opens and has great importance.
So far, it has been disclosed that opened outside the wall portion caused by springing back for having several press-formed parts for inhibiting hat section
Press-processing method.
In patent document 1, following technology is disclosed：Interim forming is shaped by drawing and forming (deep drawing)
Body, the mutual interval in cross wall portion side end of the side of sidewall portion in the shaped objects shape of the interim formed body, relative to forming section
The mutual interval in cross wall portion side end of the side of sidewall portion of the shaped objects shape of part, forms shorter；Then, according to shaped objects
Shape spreads side of sidewall portion.Also, according to the technology, the side of sidewall portion of interim formed body can reversely be bent
It (reverse bending) and turns back (bending back), the meeting that can clear up the longitudinal wall part for being present in interim formed body is made
At the stress (stress) of wall portion warpage (wall camber), to reduce from shaping dies (tool of press
Forming the wall portion warpage after (die release)) is demoulded, thus, it is possible to inhibit (wall opening) outside wall portion.
In addition, in patent document 2, in the same manner as patent document 1, disclosing following technology：By shaping its punch-pin
(punch) the bottom intermediate formed products smaller than shaped objects shape (intermediate forming part), then in next work
Target shape is configured in sequence so that the deformation that outside the wall portion caused by the rebound after demoulding is offset can be retained
Come.
Patent document 1：Japanese Unexamined Patent Publication 2008-307557 bulletins
Patent document 2：No. 4681420 bulletins of Japanese Patent No.
Invention content
It is opened outside wall portion in order to inhibit the press-formed part of hat section, it is important that：How position appropriate is applied
Add stress or deformation, is sent out with mitigating or offsetting for example to be folded back on the side of sidewall portion of deformation in drawing and forming (deep drawing)
Stress caused by raw warpage (camber).
Impact forming method disclosed in patent document 1 and patent document 2, shapes in the 1st forming process and is applied in
Stress or deform (deformation) intermediate molded body (intermediate forming part), the stress or deformation with
The tensile stress for making the compression stress being applied on the inside of side of sidewall portion (compressive stress) and being applied to outside
The mode that (tensile stress) is not acted offsets the driving stress (driving stress) opened outside wall portion；Then,
So that side of sidewall portion is protruded in the 2nd forming process again, carrys out the press-formed part of the hat section of shaped objects shape.However
In 2 forming processes, the compression stress of inside and the tensile stress in outside can be applied when making side of sidewall portion protrude, and can not be eliminated
Wall portion warpage；Also, the flange portion (flange portion) and side wall of the press-formed part due to not accounting for shaping
Angle change of the portion relative to target shape, will produce problem when being engaged with other component by the flange portion.
The present invention is to complete in view of the above problems, it is intended that offer is a kind of to shape hat section component
In the case of, it can inhibit to open outside the wall portion caused by springing back, and can inhibit to engage the method for (weld is welded) with other component
The press-processing method of the angle change in blue portion.
To solve the above-mentioned problems, reached purpose is will have top plate portion the present invention relates to a kind of press-processing method
(top portion), with the continuous side of sidewall portion of the top plate portion and with it is the continuous flange portion of the side of sidewall portion, hat section
The press-processing method of press-formed part forming, has：1st forming process, using the 1st mold by metal blank (metal
Sheet it) is configured to interim molded component, the 1st mold has plate forming portion, sidewall-forming parts and Flange Forming portion, on
Plate forming portion and above-mentioned Flange Forming portion is stated to be used for top plate portion and flange portion forming, the top plate portion and flange portion and above-mentioned punching
The target shape of pressing formation component is same shape, above-mentioned sidewall-forming parts for side of sidewall portion to be shaped, the side of sidewall portion be in it is upper
The target shape for stating press-formed part compares the shape for the chevron that the section on forming direction is protruded outward；And the 2nd
Forming process carries out crash forming using the 2nd mold to above-mentioned interim molded component, the 2nd mold have for by top plate portion,
Side of sidewall portion and flange portion forming plate forming portion, sidewall-forming parts and Flange Forming portion, the top plate portion, side of sidewall portion and
Flange portion and the target shape of above-mentioned press-formed part are same shape.
In addition, press-processing method of the present invention is in the present invention as stated above, above-mentioned press-formed part is in length side
Upwardly shaped is linear.
In addition, press-processing method of the present invention is in the present invention as stated above, in above-mentioned 1st forming process, by touching
Forming (crash forming) is hit to be formed.
In addition, press-processing method of the present invention is in the present invention as stated above, make to shape in above-mentioned 1st forming process
From the length of the crest line of punch-pin shoulder (shoulder portion) to cavity plate (die) shoulder in above-mentioned interim molded component, with
Length from punch-pin shoulder to the crest line of cavity plate shoulder in the press-formed part of above-mentioned 2nd forming process forming is identical.
Press-processing method of the present invention, as will have top plate portion, with the continuous side of sidewall portion of the top plate portion and
With the press-processing method of the continuous flange portion of the side of sidewall portion, hat section press-formed part forming, have：The 1 one-tenth
Shape process is shaped interim molded component using the 1st mold, and the 1st mold has plate forming portion, sidewall-forming parts and method
The target shape of blue forming section, above-mentioned plate forming portion and above-mentioned Flange Forming portion and above-mentioned press-formed part is phase similar shape
Shape, for above-mentioned sidewall-forming parts for shaping side of sidewall portion, which is in compared with the target shape of above-mentioned press-formed part
The shape for the chevron that section is protruded outward；And the 2nd forming process, above-mentioned interim molded component is carried out using the 2nd mold
Crash forming, the 2nd mold has with the target shape of above-mentioned press-formed part is same shape plate forming portion, side wall
Forming section and Flange Forming portion.It is touched as a result, by the way that the interim molded component reversely bent will be imparted on side of sidewall portion
Hit and be configured to target shape so that the deformation of the above-mentioned side of sidewall portion after the demoulding of above-mentioned press-formed part with by above-mentioned top plate portion
The angle change of the punch-pin shoulder connected with above-mentioned side of sidewall portion cancels each other out, and based on the deformation of the side of sidewall portion after above-mentioned demoulding
And the synergistic effect of the angle change for the cavity plate shoulder for connecting above-mentioned side of sidewall portion with above-mentioned flange portion, faced by changing to assign
When molded component the shape in chevron bending section position and radius of curvature (curvature radius), punching can be adjusted
Outside the wall portion of pressing formation component and the angle of flange portion, it can obtain and be able to inhibit outside the wall portion caused by springing back and flange
The excellent press-formed part of the angle change in portion, shape freezing.
Description of the drawings
Fig. 1 is the figure for illustrating press-processing method that embodiments of the present invention are related to, wherein (a) is to indicate the 1st
The figure of forming process (b) is the figure for indicating the 2nd forming process.
Fig. 2 is the outside drawing as the press-formed part of shaped object in embodiments of the present invention.
Fig. 3 is for illustrating the existing figure for stamping mold, wherein (a) is to indicate to be used for drawing and forming
The figure of mold (b) is the figure for indicating the mold for crash forming.
Fig. 4 is the rebound for illustrating to generate in the press-formed part shaped with existing press-processing method
Definition graph.
Fig. 5 is the figure of the interim molded component for illustrating to shape in press-processing method of the present embodiment.
Fig. 6 is the definition graph of the mold of the 1st forming process for press-processing method of the present embodiment.
Fig. 7 is the figure for illustrating the shape of the press-formed part as shaped object in the present embodiment.
Fig. 8 is the cross sectional shape for the press-formed part for indicating to be shaped by press-processing method of the present invention
Figure.
Specific implementation mode
The press-processing method that embodiments of the present invention are related to is that as shown in Figure 2 is had top plate portion 71 and top plate
71 continuous side of sidewall portion 75 of portion and with 75 continuous flange portion 79 of side of sidewall portion, hat section press-formed part 70 at
The press-processing method of shape, as shown in Figure 1, it has：1st forming process uses the 1st mold with cavity plate 10 and punch-pin 20
Metal blank 50 is configured to interim molded component 60 by 1；And the 2nd forming process, use the 2nd with cavity plate 30 and punch-pin 40
Interim molded component 60 is configured to press-formed part 70 by mold 3.
Hereinafter, after to being illustrated in the present embodiment as the press-formed part of shaped object 70, to this reality
The each process for the press-processing method that the mode of applying is related to is described in detail.
Press-formed part
As shown in Fig. 2, press-formed part 70 be with top plate portion 71, it is continuous by punch-pin shoulder 73 and top plate portion 71
Side of sidewall portion 75 and hat section by cavity plate shoulder 77 and 75 continuous flange portion 79 of side of sidewall portion, in the longitudinal direction at
Shape is linear.
In the past, press-formed part 70 as shown in Figure 2 was the drawing and forming by using mold 80 shown in Fig. 3 (a)
It (draw forming) or is shaped by using the crash forming of mold 90 shown in (b) of Fig. 3 (bending forming (bending))
's.
In the case of drawing and forming, mold 80 is made of cavity plate 81, punch-pin 83 and blank holder (blank holder) 85,
Metal blank (plate) is gripped with cavity plate 81 and blank holder 85 first, punch-pin 83 is then made to carry out opposite move to cavity plate 81
It moves to carry out draw forming.
On the other hand, in the case of crash forming, mold 90 is made of cavity plate 91 and punch-pin 93, by cavity plate 91 with it is convex
The relative movement of mould 93 sandwiches metal blank to carry out bending forming.
Either in any manufacturing process, what the press-formed part 70 that shapes all can be due to punch-pin shoulder 73 is outer
Open the rebound of (increase of the open angle between top plate portion 71 and side of sidewall portion 75) and the wall portion warpage these two aspects of side of sidewall portion 75
It is compound, generate outside wall portion, i.e. the opening amplitude of opening Amplitude Ratio target shape of the side of sidewall portion 75 of left and right opens to obtain bigger
Such deformation.
In particular, the metal blank used be high-strength steel sheet or plate thickness it is relatively thin in the case of, outside above-mentioned wall portion
More significantly, press-formed part 70 can significantly deviate target shape.
Also, in order to by the press-formed part 70 of hat section and other component by spot welding (spot welding) come
It is engaged, needs the joint surface (flange portion) of the position for making flange portion 79 and angle and other component to coincide, but in such as Fig. 4
Shown in the press-formed part 70 that produces outside the wall portion caused by springing back, the position of flange portion 79 is changed,
And the angle relative to joint surface is also changed, therefore will produce the case where can not being engaged with other component.
Therefore, for press-formed part 70, can inhibit outside wall portion and the angle of flange portion 79 becomes
That changes is stamping.
1st forming process
As shown in (a) of Fig. 1, the 1st forming process be using the 1st mold 1 with cavity plate 10 and punch-pin 20, such as by
Pressing plate (pad) 17 pushes down the process that metal blank 50 is configured to interim molded component 60, and cavity plate 10 and punch-pin 20 are distinguished
With plate forming portion 11,21, sidewall-forming parts 13,23 and Flange Forming portion 15,25.
Plate forming portion 11,21 and Flange Forming portion 15,25 are for shaping top plate portion 61 and flange portion 69, the top plate portion
61 and the target shape of flange portion 69 and press-formed part 70 be same shape (referring to Fig. 5).
In contrast, sidewall-forming parts 13,23 are used for shaped side walls portion 65, and the side of sidewall portion 65 is in the punching press with target shape
Molded component 70 compares the shape for the chevron that the section on forming direction is protruded outward (referring to Fig. 5).
In the present embodiment, side of sidewall portion 65 is by passing through punch-pin shoulder 63 and 61 continuous upper side plane portion of top plate portion
(flat portion) 65a, with the upper side plane portion continuous bending sections 65a (bent portion) 65b and by bending section
The underside plan portion 65c that 65b is connect with cavity plate shoulder 67 is constituted.Therefore, as shown in fig. 6, the 1st mold 1 has for by upside
Upper side plane forming section 13a, 23a of planar portions 65a forming, bending forming portion 13b, 23b for shaping bending section 65b,
And underside plan forming section 13c, 23c for shaping underside plan portion 65c.
The side of sidewall portion 65 shaped by sidewall-forming parts 13,23 has been assigned bending, the bending and passes through existing punching press
The seen wall portion warpage caused by springing back is in negative direction when manufacturing process forming.In addition, as shown in figure 5, punch-pin shoulder 63
Angle [alpha] open to obtain bigger than the punch-pin shoulder of target shape, the angle beta of cavity plate shoulder 67 is beaten than the cavity plate shoulder of target shape
Open to obtain smaller.
2nd forming process
2nd forming process is using the 2nd mold 3 with cavity plate 30 and punch-pin 40 as shown in Fig. 1 (b), by pressing
Plate 37 pushes down interim molded component 60 and is shaped the process that (secondary fine (restrike)) is press-formed part 70, recessed
Mould 30 and punch-pin 40 are respectively provided with plate forming portion 31,41, sidewall-forming parts 33,43 and Flange Forming portion 35,45.
Plate forming portion 31,41, sidewall-forming parts 33,43 and Flange Forming portion 35,45 with press-formed part 70
Target shape be same shape, the interim molded component 60 shaped by the 1st forming process is formed to have and target shape
Shape is the press-formed part 70 of the top plate portion 71 of same shape, side of sidewall portion 75 and flange portion 79.
Hereinafter, to the press-processing method being related to according to the present embodiment, it can inhibit stamping caused by springing back
Outside the wall portion of component 70 and the reasons why angle change of flange portion 79, illustrates.
As described above, when being formed using existing shaped mold 80,90 as shown in Figure 3, as shown in figure 4, by
Rebound after demoulding will produce because of caused by the angle change both sides of the wall portion warpage of side of sidewall portion 75 and punch-pin shoulder 73
It is opened outside wall portion.
The rebound no matter in drawing and forming or crash forming, due in forming process in the inside of side of sidewall portion 75 and
The residual stress (residual stress) that outside generates is poor (inside is compression stress, and outside is tensile stress).
Therefore, for the wall portion warpage of side of sidewall portion 75, in the 1st forming process, assign side of sidewall portion 65 is with wall portion warpage
The bend allowance (fold remaining) (back-flexing) of negative direction and interim molded component 60 is shaped, then at the 2 one-tenth
In shape process, the side of sidewall portion 65 of interim molded component 60 is configured to the side of sidewall portion 75 of target shape, is thus made stamping
(inside is tensile stress, and outside is pressure for the direction reverse for the residual stress that the inner and outer of the side of sidewall portion 75 of component 70 generates
Stress under compression).Side of sidewall portion 75 can be deformed with previous wall portion warpage in negative direction after demoulding as a result, realize that is opened outside wall portion subtracts
It is few.
On the other hand, punch-pin shoulder 73 is the punch-pin shoulder 63 that will be shaped in the 1st forming process in the 2nd forming process
To made of the direction of closure (angle [alpha] of punch-pin shoulder 63 shown in fig. 5 reduces) further bending, therefore work is shaped the 2nd
When interim molded component 60 being configured to the press-formed part 70 of target shape in sequence, since rebound punch-pin shoulder 73 can be to beating
Open the Direction distortion of (angle increase).
Although the angle of the punch-pin shoulder 73 increase so that in the side of sidewall portion 75 of the 2nd forming process with the 1st forming process
The outer Zhang Zengjia of the wall portion of 65 comparable part of side of sidewall portion, but to open outside wall portion with the deformation of 65 comparable part of side of sidewall portion and subtract
It is few, therefore cancelled each other out by the two, it is able to open outside the wall portion for inhibiting press-formed part 70, the position of flange portion 79 can be reduced
Set the difference with target shape.
Further, since underside plan portion 65c is configured to side of sidewall portion 75 in the 2nd forming process, therefore work is shaped the 1st
The cavity plate shoulder 67 that sequence shapes is shaped to the direction of opening (angle beta of cavity plate shoulder 67 shown in fig. 5 increases), the 2nd
When interim molded component 60 being configured to the press-formed part 70 of target shape in forming process, due to rebound, the 2nd forming work
The cavity plate shoulder 77 of sequence can be to the Direction distortion of closure (angle reduction).
The angle of the cavity plate shoulder 77 of even now, which is reduced, to generate shadow to the increase of the angle on joint surface to flange portion 79
It rings, but passes through the forming of above-mentioned side of sidewall portion 75 and flange portion 79 so that flange portion 79 reduces relative to the angle on joint surface.Cause
This reduces the synergistic effect with the deformation of side of sidewall portion 75 by the angle of cavity plate shoulder 77, and flange portion 79 can be inhibited relative to connecing
The increase of the angle in conjunction face.
That is, side of sidewall portion 75 back-flexing of the present invention by imparting press-formed part 70 so that press-formed part 70
Rebound in side of sidewall portion 75 after demoulding inhibit outside wall portion the angle of (position of flange portion 79) and flange portion 79 increase this two
Person.
Here, the 1st mold 1 used in the 1st forming process in the present embodiment has by upper side plane forming section
The sidewall-forming parts 13,23 that 13a, 23a, bending forming portion 13b, 23b and underside plan forming section 13c, 23c are constituted, therefore
As shown in figure 5, the upper side plane portion 65a and underside plan portion 65c of the side of sidewall portion 65 of interim molded component 60 are connected by bending section 65b
Connect and be in the shape for the chevron protruded outward.
Also, the feelings identical with the deflection after the demoulding of the comparable parts bending section 65b in press-formed part 70
Under condition, bending section 65b is higher from flange portion 69 towards position on the forming height direction in 61 direction of top plate portion, in the 2nd forming
The change in location of 75 lower end of side of sidewall portion (near the flange portion 79 of side of sidewall portion 75) caused by deformation after process demoulding is bigger, therefore
Think that the position for the bending section 65b being endowed in the 1st forming process is higher, it is more advantageous for inhibiting to open outside wall portion.
In addition, the radius of curvature R (radius of corner (fillet radius)) of bending section 65b is bigger, then in side of sidewall portion 65
In, the range reversely bent in the 2nd forming process is bigger, therefore, it is considered that the wall portion for inhibiting punch forming component 70
The effect opened outside is better.In contrast, if the radius of curvature R of bending section 65b is too small, because in the side of press-formed part 70
Wall portion 75 can leave folding line and unsatisfactory.
Therefore, by suitably changing bending section 65b from flange portion 69 towards the forming height direction in 61 direction of top plate portion
On position H and radius of curvature R, can adjust that interim molded component 60 is formed in the 2nd forming process and obtain
Press-formed part 70 the wall portion caused by springing back outside and flange portion 79 angle change.
About by change bending section 65b position H and radius of curvature R on forming height direction generate for
Inhibition wall portion is opened outside and the effect of the angle change of flange portion 69, is confirmed in the examples described below.
In addition, the interim molded component 60 shaped in the 1st forming process of press-processing method of the present invention, only
If it were not for the shape for being configured to inwardly be recessed than the dummy line of connection punch-pin shoulder 63 and cavity plate shoulder 67, can also not have
There are a planar portions as upper side plane portion 65a and underside plan portion 65c but 65 integrally bending of side of sidewall portion at protruding outward
The shape of chevron.
In addition, in the above description as the press-formed part of shaped object 70, it is configured in its longitudinal direction straight
Threadiness, and the side of sidewall portion 65 in interim molded component 60, are formed as the chevron protruded outward in the overall length of its length direction
Shape, but the present invention be not precluded when looking down in the longitudinal direction be configured to bending shape the case where or the 1st
A case where part for the side of sidewall portion of interim molded component is only configured to the shape for the chevron protruded outward in forming process.
In turn, in press-processing method of the present embodiment, the 1st forming process is carried out by crash forming
Shape, but the 1st forming process can also be carried out by drawing and forming.
About in the 1st forming process by crash forming or drawing and forming come difference when being formed, aftermentioned
It is illustrated in embodiment.
It is to push down metal blank 50 by pressing plate 17 to be formed (to join in the 1st forming process in addition, in above description
See Fig. 6), it is that interim molded component 60 is pushed down by pressing plate 37 to be formed in the 2nd forming process, but punching of the present invention
Pressing formation method can not also carry out the 1st forming process and the 2nd forming process using pressing plate 17,37.
Also, in the above description, as shown in figure 5, the forming in the interim molded component 60 of the 1st forming process forming is high
Degree is set to, identical as the forming height of press-formed part 70 of target shape shaped in the 2nd forming process, this feelings
Under condition, from punch-pin shoulder 63 to the length of the crest line of cavity plate shoulder 67 (referring to Fig. 5) than stamping in interim molded component 60
Length in component 70 from punch-pin shoulder 73 to the crest line of cavity plate shoulder 77 (referring to Fig. 7) is long.
However, press-processing method of the present invention is not limited to make the forming height and target of interim molded component
The forming height of the press-formed part of shape is identical, can also be, so that in the interim molded component of the 1st forming process forming
In from punch-pin shoulder to the length of the crest line of cavity plate shoulder, the target shape with the press-formed part shaped in the 2nd forming process
The forming height of interim molded component is set to the mode of the equal length of the crest line of cavity plate shoulder from punch-pin shoulder in shape
It is lower than the forming height of press-formed part and (drawing and forming or crash forming) is formed.
In this way, by the way that the length from punch-pin shoulder to the crest line of cavity plate shoulder in interim molded component is set as and punching press
Length in molded component from punch-pin shoulder to the crest line of cavity plate shoulder is identical so that the 1st forming process forming it is interim at
The flange portion of shape component with the 2nd forming process forming press-formed part flange portion shaping position (position) unanimously,
Therefore the forming being more nearly with the angle of the flange portion as target may be implemented.
Embodiment
In order to which the function and effect to press-processing method of the present invention confirm, carried out about stamping and
The CAE (Computer Aided Engineering, computer-aided engineering) of rebound is analyzed, and is said below to its result
It is bright.
In the present embodiment, it with the press-formed part 70 of hat section shown in Fig. 7 for shaped objects shape, carries out
As shown in (a) of Fig. 1 using the 1st mold 1 by metal blank 50 be configured to interim molded component 60 the 1st forming process, with
And interim molded component 60 is configured to the 2nd forming work of press-formed part 70 as shown in (b) of Fig. 1 using the 2nd mold 3
The Analysis of stamping forming of sequence.
Then, the press-formed part 70 for being shaped to shape lower dead center in the 2nd forming process has been carried out after demoulding
Springback Analysis.
As shown in fig. 7, the size of the target shape about press-formed part 70, if the width of top plate portion 71 be 60mm,
Forming height is D=60mm, Sidewall angles are 70 °, the radius of curvature of punch-pin shoulder 73 is R=5mm.
In addition, the metal blank 50 of the forming for press-formed part 70 is plate thickness t=1.2mm, tensile strength
The steel plate that (tensile strength) is 1180MPa grades.
In the Analysis of stamping forming of the present embodiment, the 1st forming process is to be carried out by crash forming or drawing and forming
Forming.In addition, as shown in figure 5, the side of sidewall portion 65 in the interim molded component 60 of the 1st forming process forming is by upper side plane portion
The shape for the chevron protruded outward that 65a, bending section 65b and underside plan portion 65c are constituted.Also, about interim forming
The size of component 60 changes bending section 65b and is shaping if the angle of cavity plate shoulder 67 is β=90 °, forming height D=60mm
Position H and radius of curvature R (radius of corner) in short transverse are analyzed (referring to Fig. 5).
In the present embodiment, it has sought outside the wall portion caused by springing back of press-formed part 70 and flange portion 79
Angle.Be outside the wall portion of press-formed part 70 according on forming height direction from top plate portion 71 55mm downward
The variable quantity (wall portion outer tensor Δ W) of the distance between the side of sidewall portion 75 of left and right at position Wo is evaluated (referring to figure
4, Fig. 7).In addition, the angle of flange portion 79 is according to the flange portion angle on the basis of the joint surface of the flange portion 79 of target shape
(referring to the Fig. 4) for spending θ to be evaluated.
It is indicated in fig. 8 in the case where the 1st forming process uses crash forming, by being formed by Analysis of stamping forming
The press-formed part 70 that shape goes out carries out cross sectional shape obtained from Springback Analysis.
Fig. 8 is the bending section 65b of the interim molded component 60 shaped in the 1st forming process on forming height direction
The cross sectional shape of press-formed part 70 in the case that position is H=30mm, the radius of curvature of bending section 65b is R=30mm
Analysis result.It is compared with the target shape of press-formed part 70, obtains following result：Although slightly residual in side of sidewall portion 75
There are the shape of the chevron shaped in the 1st forming process, but the position of flange portion 79 and angle and target shape substantially one
It causes.
It is indicated in table 1：1st forming process uses crash forming, change the bending section 65b of interim molded component 60 at
Position H and radius of curvature R in shape short transverse carry out Analysis of stamping forming, and to being obtained by the Analysis of stamping forming
Press-formed part 70 carries out the result of Springback Analysis, the outer tensor Δ W of the wall portion thus acquired and flange angle, θ.
Table 1
In table 1, " no countermeasure " is the knot using existing press-processing method (conventional example, referring to (b) of Fig. 3)
Fruit, condition a~h are the result using press-processing method of the present invention (example).
Compared with conventional example, example substantially reduces the outer tensor Δ W of wall portion and flange angle, θ (with reference to Fig. 4),
It works well.
In example, the difference about the position H of bending section 65b in the height direction is to the shadow of tensor Δ W outside wall portion
It rings, the condition d of position H=15mm (the relative position H/D=0.25 relative to forming height D) when to radius of curvature R=30mm,
The item of the condition g and position H=45mm (relative position H/D=0.75) of position H=30mm (relative position H/D=0.50)
Part h is compared, then understands that the increase of the position H (relative position H/D) with bending section 65b, the outer tensor Δ W of wall portion can drop
It is low.
In addition, the difference of the radius of curvature R about bending section 75b, to the condition a of radius of curvature R=5mm, radius of curvature R
The condition d of the condition b of=10mm, the condition c of radius of curvature R=20mm and radius of curvature R=30mm are compared, then may be used
Know as radius of curvature R increases, the outer tensor Δ W of wall portion and flange angle, θ both sides can reduce and close to target shape.This
Outside, to the condition g of the condition f and radius of curvature R=30mm of the condition e of radius of curvature R=10mm, radius of curvature R=20mm
It is compared, it is as a result also identical.
As can be known from these results, in the range of the position H and radius of curvature R of the bending section 65b shown in table 1, bending
The condition g that the position of portion 65b is H=30mm (relative position H/D=0.50), radius of curvature is R=30mm, obtains outside wall portion
Tensor Δ W and flange angle, θ are the best result of the degree consistent with target shape.
It is indicated in table 2：1st forming process uses drawing and forming, change the bending section 65b of interim molded component 60 at
Position H and radius of curvature R in shape short transverse carry out Analysis of stamping forming, and to being obtained by the Analysis of stamping forming
Press-formed part 70 carries out the result of Springback Analysis, the outer tensor Δ W of the wall portion thus acquired and flange angle, θ.
Table 2
In table 2, " no countermeasure " is the knot using existing press-processing method (conventional example, referring to (a) of Fig. 3)
Fruit, condition i~t are the result using press-processing method of the present invention (example).
As shown in Table 2, compared with conventional example, example substantially reduces the outer tensor Δ W of wall portion and flange angle
θ, as a result well.
In example, the difference about the position H of bending section 65b in the height direction is to the shadow of tensor Δ W outside wall portion
It rings, the condition of position H=15mm (the relative position H/D=0.25 on forming height direction) when to radius of curvature R=30mm
L, the condition r of the condition o and H=45mm (relative position H/D=0.75) of H=30mm (relative position H/D=0.50) are carried out
Compare, then understands that the increase of the position H (relative position H/D) with bending section 65b, the outer tensor Δ W of wall portion can reduce.
In addition, the difference of the radius of curvature R about bending section 65b, to condition j, R of condition i, R=10mm of R=5mm
The condition l of the condition k and R=30mm of=20mm are compared, then understand to increase with radius of curvature R, the outer tensor Δ of wall portion
W and flange angle, θ both sides can reduce and close to target shapes.In addition, the condition n of condition m, R=20mm in R=10mm
And the ratio of the condition r of the condition q and R=30mm of condition p, R=20mm of the comparison and R=10mm of the condition o of R=30mm
It is as a result also identical in relatively.
As can be known from these results, in the range of the position H and radius of curvature R of the bending section 65b shown in table 2, bending
The condition o that the position of portion 65b is H=30mm, radius of curvature is R=30mm obtains the outer tensor Δ W of wall portion and flange angle
θ is the best result of the degree consistent with target shape.
In turn, to the 1st forming process use crash forming the case where (table 1) with using drawing and forming the case where (table 2) into
Row compares, then known in the position H and identical radius of curvature R condition of bending section 65b, the flange angle, θ of crash forming with
And the outer tensor Δ W of wall portion obtains better result than the case where drawing and forming.
It is explained above, it is more convex outward than target shape by being shaped in press-processing method of the present invention
The interim molded component of the shape of the chevron gone out, reshapes the press-formed part of target shape, and can reduce is caused by rebound
Wall portion outside and flange portion angle change, and the position by suitably changing the bending section for assigning interim molded component
And radius of curvature, it can adjust outside wall portion and the angle of the flange portion of press-formed part.In addition it has also demonstrated, passes through
It is formed using crash forming in the 1st forming process, can more efficiently inhibit to spring back.
In turn, interim molded component 60 (referring to Fig. 5) is shaped using crash forming in the 1st forming process, and at the 2 one-tenth
In shape process, for above-mentioned interim molded component 60 from punch-pin shoulder 63 to the length of the crest line of cavity plate shoulder 67 and at the 2 one-tenth
Length of the press-formed part 70 (referring to Fig. 7) of shape process forming from punch-pin shoulder 73 to the crest line of cavity plate shoulder 77 is different
Situation and identical situation, the 2nd mold of change have carried out stamping.Wherein, the bending section 65b of interim molded component 60
Position is H=30mm, radius of curvature R=20mm.
As a result, from punch-pin shoulder 63 to cavity plate shoulder 67 in the interim molded component 60 of the 1st forming process forming
The length of crest line, in the press-formed part 70 that the 2nd forming process shapes from punch-pin shoulder 73 to the rib of cavity plate shoulder 77
In the case of difference of the length of line with Δ 5mm, the flange angle of press-formed part 70 is 3.6 °, the outer tensor Δ W of wall portion is
1.6mm；In contrast, in the case of making the length of above-mentioned crest line identical (difference of Δ 0mm), flange angle is 3.0 °, outside wall portion
Tensor Δ W is 1.2mm.
Therefore, by make in the interim molded component 60 that the 1st forming process shapes the length of above-mentioned crest line at the 2 one-tenth
The length of above-mentioned crest line is identical in the press-formed part 70 of shape process forming, is obtained to outside wall portion and flange angle good
Good result, it was confirmed that can more efficiently inhibit to spring back.
In accordance with the invention it is possible to provide when the press-formed part of hat section is stamping, can inhibit by returning
The press-processing method opened outside the wall portion of press-formed part caused by bullet.
Symbol description
1 the 1st mold
3 the 2nd molds
10 cavity plates
11 plate forming portions
13 sidewall-forming parts
13a upper side plane forming sections
13b bending forming portion
13c underside plan forming sections
15 Flange Forming portions
17 pressing plates
20 punch-pin
21 plate forming portions
23 sidewall-forming parts
23a upper side plane forming sections
23b bending forming portion
23c underside plan forming sections
25 Flange Forming portions
30 cavity plates
31 plate forming portions
33 sidewall-forming parts
35 Flange Forming portions
37 pressing plates
40 punch-pin
41 plate forming portions
43 sidewall-forming parts
45 Flange Forming portions
50 metal blanks
60 interim molded components
61 top plate portions
63 punch-pin shoulders
65 side of sidewall portion
65a upper side planes portion
65b buckling portions
65c underside plans portion
67 cavity plate shoulders
69 flange portions
70 press-formed parts
71 top plate portions
73 punch-pin shoulders
75 side of sidewall portion
77 cavity plate shoulders
79 flange portions
80 molds (prior art)
81 cavity plates
83 punch-pin
85 blank holders
90 molds (prior art)
91 cavity plates
93 punch-pin
Claims (4)
1. a kind of press-processing method, be will have top plate portion, with the continuous side of sidewall portion of the top plate portion and with the side of sidewall portion
The press-processing method of continuous flange portion, hat section press-formed part forming, which is characterized in that have：
1st forming process, using the 1st mold by Sheet metal forming be interim molded component, the 1st mold have plate forming
Portion, sidewall-forming parts and Flange Forming portion, the plate forming portion and the Flange Forming portion are used for top plate portion and flange
Portion shapes, and the top plate portion and flange portion and the target shape of the press-formed part are same shape, the sidewall-forming parts
For shaping side of sidewall portion, the side of sidewall portion is in the section compared with the target shape of the press-formed part on forming direction
The shape for the chevron protruded outward；And
2nd forming process carries out crash forming using the 2nd mold to the interim molded component, and the 2nd mold has for inciting somebody to action
Plate forming portion, sidewall-forming parts and the Flange Forming portion of top plate portion, side of sidewall portion and flange portion forming, the top plate portion, side
Wall portion and flange portion and the target shape of the press-formed part are same shape.
2. press-processing method according to claim 1, which is characterized in that the press-formed part is in the longitudinal direction
It is configured to linear.
3. press-processing method according to claim 1 or 2, which is characterized in that in the 1st forming process, by touching
Forming is hit to be formed.
4. press-processing method according to any one of claims 1 to 3, which is characterized in that make in the 1st forming
It is shaped from punch-pin shoulder to the length of the crest line of cavity plate shoulder with the described 2nd in the interim molded component of process forming
Length in the press-formed part of process forming from punch-pin shoulder to the crest line of cavity plate shoulder is identical.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016090012A JP6152911B1 (en) | 2016-04-28 | 2016-04-28 | Press forming method |
| JP2016-090012 | 2016-04-28 | ||
| PCT/JP2017/002471 WO2017187679A1 (en) | 2016-04-28 | 2017-01-25 | Press molding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108778548A true CN108778548A (en) | 2018-11-09 |
| CN108778548B CN108778548B (en) | 2020-01-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780017048.5A Active CN108778548B (en) | 2016-04-28 | 2017-01-25 | Press forming method |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP6152911B1 (en) |
| KR (1) | KR102105348B1 (en) |
| CN (1) | CN108778548B (en) |
| WO (1) | WO2017187679A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109513778A (en) * | 2018-12-06 | 2019-03-26 | 安徽人防设备有限公司 | Defense equipment hinge page protective case compression molding device |
| CN113747983A (en) * | 2019-05-13 | 2021-12-03 | 杰富意钢铁株式会社 | Press forming method |
| CN115213255A (en) * | 2022-07-15 | 2022-10-21 | 上汽通用五菱汽车股份有限公司 | Method for adjusting dimensional deviation of stamping part, electronic device and storage medium |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7008159B1 (en) | 2021-10-05 | 2022-01-25 | 株式会社ジーテクト | Bending equipment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS566731A (en) * | 1979-06-29 | 1981-01-23 | Matsushita Electric Works Ltd | Molding die of irregular-shape assembled material |
| JPH04147718A (en) * | 1990-10-12 | 1992-05-21 | Nissan Motor Co Ltd | Press die |
| CN102099133A (en) * | 2008-07-18 | 2011-06-15 | 丰田自动车株式会社 | Workpiece bending method and apparatus |
| CN102764807A (en) * | 2011-05-02 | 2012-11-07 | 本田技研工业株式会社 | Manufacturing method of press product and press forming apparatus |
| JP2013233548A (en) * | 2012-05-02 | 2013-11-21 | Unipres Corp | Hot press molding device |
| JP2014004618A (en) * | 2012-06-27 | 2014-01-16 | Jfe Steel Corp | Press forming method, press forming device and press formed product |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4021793B2 (en) * | 2003-04-16 | 2007-12-12 | 新日本製鐵株式会社 | Press molding method for hat-shaped molded parts with excellent shape freezing properties |
| JP4681420B2 (en) | 2005-10-19 | 2011-05-11 | 新日本製鐵株式会社 | Press molding method and press mold excellent in shape freezing property |
| JP2008307557A (en) | 2007-06-13 | 2008-12-25 | Kobe Steel Ltd | Two-stage press forming method |
| ES2632276T3 (en) * | 2013-01-16 | 2017-09-12 | Nippon Steel & Sumitomo Metal Corporation | Press shaping method |
-
2016
- 2016-04-28 JP JP2016090012A patent/JP6152911B1/en active Active
-
2017
- 2017-01-25 KR KR1020187029103A patent/KR102105348B1/en active IP Right Grant
- 2017-01-25 CN CN201780017048.5A patent/CN108778548B/en active Active
- 2017-01-25 WO PCT/JP2017/002471 patent/WO2017187679A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS566731A (en) * | 1979-06-29 | 1981-01-23 | Matsushita Electric Works Ltd | Molding die of irregular-shape assembled material |
| JPH04147718A (en) * | 1990-10-12 | 1992-05-21 | Nissan Motor Co Ltd | Press die |
| CN102099133A (en) * | 2008-07-18 | 2011-06-15 | 丰田自动车株式会社 | Workpiece bending method and apparatus |
| CN102764807A (en) * | 2011-05-02 | 2012-11-07 | 本田技研工业株式会社 | Manufacturing method of press product and press forming apparatus |
| JP2013233548A (en) * | 2012-05-02 | 2013-11-21 | Unipres Corp | Hot press molding device |
| JP2014004618A (en) * | 2012-06-27 | 2014-01-16 | Jfe Steel Corp | Press forming method, press forming device and press formed product |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109513778A (en) * | 2018-12-06 | 2019-03-26 | 安徽人防设备有限公司 | Defense equipment hinge page protective case compression molding device |
| CN113747983A (en) * | 2019-05-13 | 2021-12-03 | 杰富意钢铁株式会社 | Press forming method |
| CN113747983B (en) * | 2019-05-13 | 2023-05-09 | 杰富意钢铁株式会社 | Press forming method |
| CN115213255A (en) * | 2022-07-15 | 2022-10-21 | 上汽通用五菱汽车股份有限公司 | Method for adjusting dimensional deviation of stamping part, electronic device and storage medium |
| CN115213255B (en) * | 2022-07-15 | 2024-06-07 | 上汽通用五菱汽车股份有限公司 | Stamping part size deviation adjusting method, electronic equipment and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2017196646A (en) | 2017-11-02 |
| KR20180119672A (en) | 2018-11-02 |
| KR102105348B1 (en) | 2020-04-28 |
| WO2017187679A1 (en) | 2017-11-02 |
| CN108778548B (en) | 2020-01-31 |
| JP6152911B1 (en) | 2017-06-28 |
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