CN105307792B - Impact forming method - Google Patents
Impact forming method Download PDFInfo
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- CN105307792B CN105307792B CN201480033169.5A CN201480033169A CN105307792B CN 105307792 B CN105307792 B CN 105307792B CN 201480033169 A CN201480033169 A CN 201480033169A CN 105307792 B CN105307792 B CN 105307792B
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- metallic plate
- drift
- eccentric swage
- pressed compact
- material ring
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- 239000000463 material Substances 0.000 claims abstract description 80
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- 238000009751 slip forming Methods 0.000 claims description 5
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Classifications
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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
- B21D22/26—Deep-drawing for making peculiarly, e.g. irregularly, shaped articles
-
- 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
- B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
- B21D24/04—Blank holders; Mounting means therefor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Forging (AREA)
Abstract
Impact forming method involved in the present invention is characterised by having：Metallic plate arrangement step, the position (17a) suitable with the end of minor face end (2a) by metallic plate (17) configures metallic plate (17) in the way of not riding over pressed compact material ring (9)；Metallic plate clamps operation, clamps the metallic plate (17) having configured；Molding procedure, carries out molding by drawing process to the metallic plate (17) of clamped state；And eccentric swage pressing process, after metallic plate clamping operation, drift (6) and eccentric swage (11) is utilized to come the position including the flexing portion (2b) inclusion L-shaped shape at the position suitable with top plate portion (2) by laminated metal sheet (17) in molding procedure midway, eccentric swage pressing process is from the beginning of with respect in molding procedure, from the position that drift (6) and metallic plate (17) come into contact with, the form depth to bottom dead center position is 0%～50% position, pressed compact material ring compression is more than 0.7MPa, and eccentric swage pressure is more than 3MPa.
Description
Technical field
The present invention relates to being in the L-shaped shape portion of L-shaped shape or the T word of top view shape in T shape to having top view
The part of shape portion carries out the impact forming method of molding.
Background technology
For example the body frame part of automobile that is, front is being manufactured by metallic plate by punch forming (press forming)
Post (pillar) reinforcement (reinforcement), center pillar stiffener etc. have the L-shaped shape portion that top view is in L-shaped shape
Or in the case of the part in T-shaped portion of shape in T shape, generally adopt drawing and forming (drawing) method.Drawing and forming side
Method is following method：It is usually used by drift (punch), punch die (die), and pressed compact material ring (blank holder) is (wrinkle resistant
Part) mould (die of press forming) that constitutes, to carry out, pressing laminated metal sheet using punch die and pressed compact material ring
The surrounding of (metal sheet) all in the state of reduce the distance between drift and punch die and metallic plate enforcement drawing is added
Work.
In such drawing and forming method, becoming the L-shaped shape portion of the shape drastically bending or the portion in T-shaped portion
Part top plate portion (top portion) easily produces fold (wrinkles).On the other hand, if in order to suppress this fold and further
Improve the pressing force by punch die and pressed compact material ring, then in the longitudinal wall part of the shoulder (shoulder portion) of mould, part
(vertical wall portion), part easily cracks (crack).Particularly in recent years, in order to realize body of a motor car
Safety raising and lightness (weight reduction of automotive body), become shaping raw material
(steel sheet：Steel plate) metallic plate intensity more and more higher.The metallic plate of such high intensity (high-strength)
When cannot expect the ductility, therefore reply punch forming of the degree of soft steel plate (soft steel sheet) in the past using
Crackle and fold countermeasure become important.
For such problem, in the technology being proposed so far, one kind is proposed in order to carry out to L-shaped shape part
Molding and after drawing and forming more mold exchange be manually bent further such, formed via Multi-step forming molding procedure
The method (with reference to patent documentation 1) of final products shape.In addition it is also proposed that a kind of using by punching die, eccentric swage and curved
The die unit that bent mould (bending die) is constituted carrys out the punch forming that punch forming has the skeleton part in L-shaped shape portion
Method (with reference to patent documentation 2).
Patent documentation 1：International Publication WO2012/070623
Patent documentation 2：International Publication WO2011/145679
However, in method described in patent documentation 1, molding procedure number increases, therefore cost raises.In addition, special
Although there is no problem in the case of the flange substantially same level of part in method described in sharp document 2, but in picture
In the case that center pillar stiffener etc. coordinates the curve form of vehicle body to make the bending of flange (flange) shaped three dimensional ground like that, in L
The flange of the position (being equivalent to the position at the straight line position of Fig. 1 or Fig. 2 of patent documentation 2) beyond word shape portion, the product of fold
Life becomes apparent from than existing drawing and forming.
Content of the invention
The present invention completes to solve above-mentioned problem, its object is to provide a kind of low even with ductility
The high strength steel (high-tensile steel sheet) of superhigh intensity (ultra high strength), bow having
Depending on observe in the L-shaped shape portion of L-shaped shape or top view shape in T shape T-shaped portion part in also can not increase
Molding procedure number and realize the suppression of fold and the impact forming method avoiding of crackle.
Impact forming method involved by the 1st aspect of the present invention uses has drift, punch die, pressed compact material ring and pressure
The punch-forming mold of glassware (pad), metallic plate punch forming is become to possess top plate portion, longitudinal wall part and flange part and have
Top view is in the part in the L-shaped shape portion of L-shaped shape, and above-mentioned drift has forming surface, and above-mentioned punch die has and this drift pair
The forming surface answered, clamps above-mentioned metallic plate between above-mentioned pressed compact material ring and this punch die, and above-mentioned eccentric swage and drift coordinate to press from both sides
Hold a part for above-mentioned metallic plate, above-mentioned longitudinal wall part is formed at around this top plate portion, above-mentioned flange part is continuous with this longitudinal wall part
Ground is formed, and above-mentioned impact forming method is characterised by having：Metallic plate arrangement step, with this metallic plate and above-mentioned L-shaped
The mode that the suitable position in the end of the minor face of shape does not ride over above-mentioned pressed compact material ring configures above-mentioned metallic plate；Metallic plate clamps work
Sequence, clamped using above-mentioned punch die and above-mentioned pressed compact material ring be configured to by this metallic plate arrangement step above-mentioned on pressed compact material ring
Metallic plate；Molding procedure, pushes drift with respect to by the above-mentioned metallic plate of above-mentioned punch die and the state of above-mentioned pressed compact material ring clamping
And by drawing process, molding is carried out to above-mentioned metallic plate；And eccentric swage pressing process, above-mentioned metallic plate clamping operation it
Afterwards, above-mentioned molding procedure midway using above-mentioned drift press above-mentioned metallic plate with above-mentioned eccentric swage with above-mentioned top plate portion phase
When position the position at least including the flexing portion of L-shaped shape, this eccentric swage pressing process is with respect to above-mentioned molding
The position coming into contact with above-mentioned metallic plate from above-mentioned drift in operation is to lower dead center (bottom dead center) position
Till form depth be that 0%～50% position starts, using above-mentioned punch die and above-mentioned pressure in above-mentioned metallic plate clamping operation
Blank ring press above-mentioned metallic plate average pressure be more than 0.7MPa, in above-mentioned eccentric swage pressing process utilize above-mentioned drift with
The average pressure that above-mentioned eccentric swage presses above-mentioned metallic plate is more than 3MPa.
Impact forming method involved by the 2nd aspect of the present invention uses has drift, punch die, pressed compact material ring and pressure
The punch-forming mold of glassware, metallic plate punch forming is become to possess top plate portion, longitudinal wall part and flange part and have vertical view
Observe the part in the T-shaped portion of shape in T shape, above-mentioned drift has forming surface, and above-mentioned punch die has corresponding with this drift
Forming surface, clamps above-mentioned metallic plate between above-mentioned pressed compact material ring and this punch die, and above-mentioned eccentric swage and drift coordinate on to clamp
State a part for metallic plate, above-mentioned longitudinal wall part is formed at around this top plate portion, above-mentioned flange part and the continuous landform of this longitudinal wall part
Become, above-mentioned impact forming method is characterised by having：Metallic plate arrangement step, T-shaped with above-mentioned with this metallic plate
The mode that the suitable position in the end of horizontal edge does not ride over above-mentioned pressed compact material ring configures above-mentioned metallic plate；Metallic plate clamps operation, profit
Clamp the above-mentioned metal being configured to by this metallic plate arrangement step on pressed compact material ring with above-mentioned punch die and above-mentioned pressed compact material ring
Plate；Molding procedure, leads to respect to being pushed drift by the above-mentioned metallic plate of above-mentioned punch die and the state of above-mentioned pressed compact material ring clamping
Cross drawing process and molding is carried out to above-mentioned metallic plate；And eccentric swage pressing process, after above-mentioned metallic plate clamping operation,
Above-mentioned molding procedure midway presses the suitable with above-mentioned top plate portion of above-mentioned metallic plate using above-mentioned drift with above-mentioned eccentric swage
The position at least including the linking part of T-shaped horizontal edge and longitudinal edge at position, this eccentric swage pressing process with respect to
The position coming into contact with above-mentioned metallic plate from above-mentioned drift in above-mentioned molding procedure becomes moldeed depth to bottom dead center position
Spend the position for 0%～50% to start, pressed using above-mentioned punch die and above-mentioned pressed compact material ring in above-mentioned metallic plate clamping operation
The average pressure stating metallic plate is more than 0.7MPa, is pressed with above-mentioned eccentric swage using above-mentioned drift in above-mentioned eccentric swage pressing process
The average pressure pressing above-mentioned metallic plate is more than 3MPa.
According to the present invention, it is in the L-shaped shape portion of L-shaped shape or the T word of top view shape in T shape having top view
In the part of shape portion, the high strength steel even with the low superhigh intensity of ductility is used as metallic plate it is also possible to not increase
Add-on type process number and realize the suppression of fold and avoiding of crackle.
Brief description
Fig. 1 is the explanatory diagram that the impact forming method involved by the first embodiment of the present invention is illustrated.
Fig. 2 is molding object that is, the L-shaped shape portion of the impact forming method involved by the first embodiment of the present invention
The top view of part.
Fig. 3 is the A-A of the L-shaped shape part shown in Fig. 2 to the enlarged drawing regarding section.
Fig. 4 is to punch-forming mold used in the impact forming method involved by the first embodiment in the present invention
The explanatory diagram illustrating.
Fig. 5 is to punch-forming mold used in the impact forming method involved by the first embodiment in the present invention
The explanatory diagram illustrating, expression is mounted with the figure of the state of punch-forming mold in punch forming device.
Fig. 6 is to the pressure in the eccentric swage pressing process of the impact forming method involved by the first embodiment of the present invention
The explanatory diagram that one example of glassware scope illustrates.
Fig. 7 is to the pressure in the eccentric swage pressing process of the impact forming method involved by the first embodiment of the present invention
The explanatory diagram that one example of glassware scope illustrates.
Fig. 8 is the metal in the metallic plate arrangement step of the impact forming method involved by the first embodiment of the present invention
The explanatory diagram that one example of the configuration of plate illustrates.
Fig. 9 is other molding objects that is, tool as the impact forming method involved by second embodiment of the present invention
The top view of center pillar having an example of the part in T-shaped portion and illustrating.
Figure 10 is the enlarged drawing regarding section for the B-B direction of the center pillar shown in Fig. 9.
Figure 11 is the configuration to the metallic plate in the metallic plate arrangement step of the situation of the center pillar shown in punch forming Fig. 9
The explanatory diagram that one example illustrates.
Figure 12 is the molding object of the impact forming method involved by embodiments of the invention 1 that is, the top view of front pillar.
Figure 13 is the C-C of the front pillar shown in Figure 12 to the enlarged drawing regarding section.
Figure 14 is under punch-forming mold used in the impact forming method involved by embodiments of the invention 1
The explanatory diagram that mould (lower die) illustrates.
Figure 15 be to used in the impact forming method involved by embodiments of the invention 1 punch-forming mold upper
The explanatory diagram that mould (upper die) illustrates.
Figure 16 is the explanatory diagram of the condition of molding of the impact forming method involved by embodiments of the invention 1, is to binder
The explanatory diagram that the starting position of device pressing process illustrates.
Figure 17 is the explanatory diagram of the condition of molding of the impact forming method involved by embodiments of the invention 1, is to metal
The explanatory diagram that the configuration of the metallic plate in plate arrangement step illustrates.
Figure 18 is the explanatory diagram of the condition of molding of the impact forming method involved by embodiments of the invention 1, is to binder
The explanatory diagram that eccentric swage scope in device pressing process illustrates.
Figure 19 is the explanatory diagram of the condition of molding of the impact forming method involved by embodiments of the invention 2, is to metal
The explanatory diagram that the configuration of the metallic plate in plate arrangement step illustrates.
Specific embodiment
[first embodiment]
Impact forming method (with reference to Fig. 1) involved by the first embodiment of the present invention is using shown in Fig. 4 and Fig. 5
Punch-forming mold 5 method of carrying out the L-shaped shape part 1 shown in punch forming Fig. 2 and Fig. 3.To impact forming method
Before illustrating, L-shaped shape part 1 and punch-forming mold 5 are illustrated.Hereinafter, L-shaped shape part 1 is carried out
General introduction.
As shown in Fig. 2 L-shaped shape part 1 has the top plate portion that top view is in the L-shaped shape being made up of long side and minor face
2nd, it is formed at the longitudinal wall part 3 of the surrounding of top plate portion 2 and the flange part 4 being continuously formed with longitudinal wall part 3, its section such as Fig. 3 institute
Show in hat (hat-shape).It is formed without vertical at the both ends on the long side of top plate portion 2 and the end (minor face end 2a) of minor face
Wall portion 3 and flange part 4.
Next, being illustrated to punch-forming mold 5 according to Fig. 4～Fig. 8.As shown in figure 4, punch-forming mold 5 has
Have：There is the drift 6 of forming surface 6a；There is the punch die 7 of forming surface 7a corresponding with drift 6；Pressed compact material ring 9, at it with punch die 7
Between clamping metallic plate 17 (with reference to Fig. 5)；And eccentric swage 11, it coordinates a part (ginseng to clamp metallic plate 17 with drift 6
According to Fig. 5).As shown in figure 5, drift 6 and pressed compact material ring 9 are installed on backing plate (bolster) 13, punch die 7 and eccentric swage 11 are pacified
It is loaded on sliding part (slider) 15.Hereinafter, each structure is described in detail.
＜ drift ＞
As shown in figure 4, drift 6 has forming surface 6a that top view is in L-shaped shape, configuration is being arranged at pressed compact material ring 9
Peristome 9a.
＜ punch die ＞
The central part of punch die 7 is recessed as L-shaped shape as illustrated in fig. 4, and the inner surface of this depression is one-tenth corresponding with drift 6
Type face 7a.The position in the flexing portion of the inclusion L-shaped shape of forming surface 7a is provided with peristome 7b, is configured with this peristome 7b
Eccentric swage 11 (with reference to Fig. 5 and Fig. 6).The lower surface of punch die 7 becomes clamping face 7c, this clamping face 7c and pressed compact material ring 9 it
Between clamp metallic plate 17.
＜ pressed compact material ring ＞
The central authorities of pressed compact material ring 9 are provided with peristome 9a, are configured with drift 6 in peristome 9a.As shown in figure 5, pressed compact
Material ring 9 is buffered pin (cushion pin) 19 and supports as moving up and down.Pressed compact material ring 9 is supported to usually positioned at specific impulse
6 upper surface position closer to the top, can be swaged 7 pressures in punch forming.If pressed compact material ring 9 is depressed, rush
6 relatively project from pressed compact material ring 9, thus the top insertion punch die 7 (with reference to Fig. 1 (c)) of drift 6.
＜ eccentric swage ＞
As shown in figure 5, eccentric swage 11 is configured to be pressed towards drift 6 side by cylinder (gas cylinder) 21 grade, and
Ordinatedly clamp a part for the top plate portion 2 (with reference to Fig. 2) of metallic plate 17 with drift 6.As shown in fig. 6, the shape of eccentric swage 11
Be formed as pressing the position being equivalent to flexing portion 2b (with reference to Fig. 2) of metallic plate 17.Thus, it is possible to suppression flexing portion 2b
The generation of fold.Additionally, as shown in fig. 7, the tangent line at two ends in the circular arc D and circular arc D of the inner side being formed from flexing portion 2b
The part that L1 and tangent line L2 impales is easiest to produce fold, and preferably eccentric swage 11 presses more than 8 one-tenth of the area S of this part.
Next, illustrating to the impact forming method involved by the present embodiment using above-mentioned diel.This
Impact forming method involved by embodiment has following operation：Metallic plate arrangement step, metallic plate 17 is configured to metal
The position that the end of the minor face with L-shaped shape of plate 17 is suitable does not ride over pressed compact material ring 9 (with reference to Fig. 1 (a))；Metallic plate clamps work
Sequence, clamps, using punch die 7 and pressed compact material ring 9, the metallic plate 17 (ginseng being configured on pressed compact material ring 9 by metallic plate arrangement step
According to Fig. 1 (b))；Molding procedure, with respect to 7 states that hold with pressed compact material ring 9 that are swaged metallic plate 17 push drift 6 and
By drawing process, molding is carried out to metallic plate 17；And eccentric swage pressing process, after metallic plate clamping operation, in molding
Operation midway utilizes drift 6 and eccentric swage 11 to press inclusion flexing portion (the elbow-shaped bend of laminated metal sheet 17
Portion) the position (with reference to Fig. 1 (c)) of 2b.Hereinafter above-mentioned each operation is described in detail.
＜ metallic plate arrangement step ＞
As shown in figure 8, metallic plate arrangement step is that metallic plate 17 is configured to the suitable with minor face end 2a of metallic plate 17
Position 17a do not ride over the operation of pressed compact material ring 9.If ride over the side of pressed compact material ring 9 with the position 17a suitable with minor face end 2a
Formula carries out punch forming, then larger to the load of the metallic plate 17 at this position, thus the shoulder pair with drift 6 of metallic plate 17
The position answered cracks, produce fold in the flange part 4 of part near corners.Therefore, configure metallic plate 17 as described above
Carry out the generation of Crack prevention, fold.
＜ metallic plate clamps operation ＞
Metallic plate clamping operation is to clamp using punch die 7 and pressed compact material ring 9 to be configured to pressure by metallic plate arrangement step
The operation of the metallic plate 17 on blank ring 9.Like this, using punch die 7 with pressed compact material ring 9 clamping metallic plate 17 the reasons why be in order to
Suppression produces fold in flange.In the case of not utilizing punch die 7 and pressed compact material ring 9 clamping, if press-in drift 6, in part
The change section periphery of shape, the part that can move freely in metallic plate 17 flows into, and easily produces fold.Particularly becoming part
The end of metallic plate 17 of flange part 4 (with reference to Fig. 2) near, metallic plate 17 can be easily deformed, and therefore produces larger
Fold.Therefore, start to need using punch die 7 with pressed compact material ring 9 by laminated metal sheet 17 from the punch forming initial stage.Furthermore it is preferred that it is sharp
It is more than 0.7MPa with the average pressure (pressed compact material ring compression) that punch die 7 and pressed compact material ring 9 press laminated metal sheet 17.
＜ molding procedure ＞
Molding procedure is to pass through with respect to the metallic plate 17 pushing drift 6 of 7 states clamping with pressed compact material ring 9 that are swaged
Drawing process carry out the operation of molding to metallic plate 17.
＜ eccentric swage pressing process ＞
Eccentric swage pressing process is after metallic plate clamping operation, utilizes drift 6 and eccentric swage in molding procedure midway
11 by laminated metal sheet 17 position including the position suitable with flexing portion 2b operation.Like this, using drift 6 and pressure
Glassware 11 is effective by laminated metal sheet 17 to the generation of the fold in suppression flexing portion 2b (with reference to Fig. 7).If using drift 6 with
The scope (eccentric swage scope) that laminated metal sheet 17 pressed by eccentric swage 11 is at least flexing portion 2b (with reference to Fig. 2), then can press fold
Generation become the position of problem.Top plate portion 2 can also be pressed in broader scope.
Eccentric swage pressing process is with respect to the position (ginseng coming into contact with metallic plate 17 from drift 6 in molding procedure
According to Fig. 1 (b)) form depth to bottom dead center position (with reference to Fig. 1 (c)) is that 0%～50% position starts.Make using punching
6 with eccentric swage 11 start by laminated metal sheet 17 when be engraved in 0% position of form depth after, in drift 6 and metallic plate
The reasons why after 17 contacts, is because：The gold at the top plate portion 2 that drift 6 initial stage of the contact with metallic plate 17 starts can be suppressed
Belong to the expansion of plate 17, can effectively suppress the generation of fold.
Not preferably than the 0% of form depth more forwardly of position (position for example shown in Fig. 1 (a)) utilize drift 6 with
Laminated metal sheet 17 pressed by eccentric swage 11, this is because, utilized binder before using punch die 7 and pressed compact material ring 9 by laminated metal sheet 17
Device 11 is pressed into metallic plate 17 to drift 6 direction, leads to produce excessive material residue with respect to the net shape of part.In addition,
Even if starting by laminated metal sheet 17 using drift 6 and eccentric swage 11 after exceeding 50% position of form depth, in top board
Portion 2 become wavy expansion also larger it is impossible to complete inhibition fold, start to press hence with drift 6 and eccentric swage 11
The moment of metallic plate 17 is to the 50% of form depth position.Additionally, the position that drift 6 is initially contacted with metallic plate 17
Can not press in the range of laminated metal sheet 17 in drift 6 and eccentric swage 11.
The average pressure (eccentric swage pressure) pressing laminated metal sheet 17 preferably by drift 6 and eccentric swage 11 is more than 3MPa.
Thus, it is possible to the generation of the fold in suppression top plate portion 2 grade.
By above content, according to present embodiment, in the case of punch forming L-shaped shape part 1, even with prolonging
The high strength steel of the low superhigh intensity of malleability is used as metallic plate 17 it is also possible to not increasing molding procedure number and realizing fold
Suppression is avoided with crackle.
Additionally, in the above, being illustrated as a example enumerating the overall L-shaped shape part 1 in L-shaped shape, but
Can not be the part in global shape with L-shaped shape portion, as such part, can enumerate global shape is in substantially U
The part of word shape, be in substantially zigzag shape part etc..
[second embodiment]
In addition to having the part in L-shaped shape portion, for having the part in T-shaped portion, the present invention equally also can
Enough applicable.As an example of the part with T-shaped portion, Fig. 9 illustrates in body of a motor car (automotive body)
Post reinforcement (hreinafter referred to as " center pillar 23 ").As shown in figure 9, center pillar 23 possesses：There is two top view shape in T shape
T-shaped portion, top plate portion 25, be formed at the longitudinal wall part 27 of surrounding of top plate portion 25 and be continuously formed with longitudinal wall part 27
Flange part 29, the section of center pillar 23 is in substantially hat as shown in Figure 10.The global shape of center pillar 23 is T-shaped by two
Longitudinal edge shape connected to each other.Both ends (horizontal edge end 25a, horizontal edge end 25b, horizontal edge in each T-shaped horizontal edge
End 25c and horizontal edge end 25d) it is formed without longitudinal wall part 27 and flange part 29.
Punch-forming mold is using structure (drift 32 Figure 11 shown in, the pressed compact material suitable with above-mentioned punch-forming mold 5
Ring 33 and punch die (not shown), eccentric swage).Impact forming method also carries out above-mentioned metallic plate arrangement step, metal respectively
Plate clamping operation, molding procedure and eccentric swage pressing process.In metallic plate arrangement step, as shown in figure 11, with metallic plate
35 with horizontal edge end 25a, horizontal edge end 25b, horizontal edge end 25c and suitable position 35a, 35b, the 35c of horizontal edge end 25d
And 35d does not ride over the mode of pressed compact material ring 33 and configures.The width ratio at the position suitable with T-shaped horizontal edge of metallic plate 35
The narrow width of horizontal edge.Thus, it is possible to avoid the shoulder in drift 32 to crack and the flange part 29 near piece corner
Produce fold.
In eccentric swage pressing process, press the scope of laminated metal sheet 35 for example as thick in Fig. 9 using drift 32 and eccentric swage
Line surrounded partly shown as be T-shaped horizontal edge and longitudinal edge linking part 25e.Thus, it is possible to press the product of fold
It is generated as the position of problem.Top plate portion 25 can also be pressed in broader scope.In addition, in eccentric swage pressing process, profit
Start by the moment of laminated metal sheet 35 can be situation identical with above-mentioned L-shaped shape part 1 with drift 32 and eccentric swage
Condition.Additionally, center pillar 23 is become by excision ((trimming) is processed in trimming) unwanted part after punch forming
Whole component shape.
Embodiment 1
In order to confirm to the action effect of the impact forming method of the present invention, carry out specific experiment.In experiment
In, under the conditions of various punch formings, the punch forming vapour as the part with L-shaped shape portion shown in Figure 12 and Figure 13
The front pillar reinforcement (hreinafter referred to as " front pillar 40 ") of car vehicle body, has carried out the evaluation of fold, crackle to each punch forming part.
As shown in figure 12, front pillar 40 has top view is in the top plate portion 41 of L-shaped shape, the shape being made up of long side and minor face
Become the longitudinal wall part 42 of the surrounding of top plate portion 41 and the flange part 43 being continuously formed with longitudinal wall part 42, the section of front pillar 40
It is in substantially hat as shown in figure 13.It is formed without with the end (minor face end 41a) of minor face at the both ends on the long side of front pillar 40
Longitudinal wall part 42 and flange part 43.
In the present embodiment, employ the punch-forming mold shown in Figure 14 and Figure 15.Figure 14 is lower mould, using buffering
Pin 44 supports pressed compact material ring 45.The central authorities of pressed compact material ring 45 are provided with peristome 45a, are configured with drift 47 in peristome 45a.
Figure 15 is upper mould, and sliding part (not shown) is provided with punch die 51, and this punch die 51 has the depressed part 51a for drift 47 insertion.
It is configured with eccentric swage 53 in the peristome 51b of the bottom surface of the depressed part 51a being arranged at punch die 51.
Eccentric swage 53 links cylinder (not shown) and produces load, the extrusion position of eccentric swage 53 pass through sliding part with
Put into metal derby (not shown) between cylinder to be adjusted.Metallic plate 55 (with reference to Figure 16) using tensile strength 980MPa level with
And 1180MPa level cold-rolled steel sheet both, it is used as the high strength steel of the low superhigh intensity of ductility.The thickness of slab of metallic plate 55
For 1.4mm.Punch forming is to make pressed compact material ring compression (MPa), eccentric swage scope, eccentric swage pressure (MPa), eccentric swage project position
Put (%) and metallic plate configuration variation and be combined and carry out under multiple conditions.Above-mentioned condition is as shown in table 1.
[table 1]
[table 1]
In condition shown in the example of the present invention 1～example 11 of the present invention of table 1, above-mentioned pressed compact material ring compression, eccentric swage
Scope, eccentric swage pressure, eccentric swage extrusion position and metallic plate configuration are all within the scope of the present invention.Comparative example 1～compare
Condition shown in example 5 is included outside the scope of the invention.Below to pressed compact material ring compression, eccentric swage scope, eccentric swage pressure, binder
Device extrusion position and metallic plate configuration are described in detail.
Pressed compact material ring compression is the average pressure in the region be swaged 51 metallic plates 55 clipping with pressed compact material ring 45,
More than 0.7MPa is the scope of the present invention.Eccentric swage pressure is to be pressed with eccentric swage 53 using drift 47 in eccentric swage pressing process
The average pressure of metallic plate 55, more than 3MPa is the scope of the present invention.
For eccentric swage extrusion position, utilize in the state of unloading eccentric swage 53 as shown in Figure 16 punch die 51 with
Pressed compact material ring 45 clips metallic plate 55, and when being provided with eccentric swage 53 in this condition, eccentric swage 53 is contacted with metallic plate 55
Position is 0% position of eccentric swage 53, and more closer to the top than initial point is negative direction than initial point more on the lower for positive direction, becomes moldeed depth
Spend for 100% position.In eccentric swage extrusion position, 0%～50% position is the scope of the present invention.
The configuration of metallic plate 55 as shown in figure 17, has two kinds.Figure 17 (a) is with metallic plate 55 and minor face end 41a
The mode that suitable position 55a does not ride over pressed compact material ring 45 configures the situation of metallic plate 55, Figure 17 (b) be with metallic plate 55 with
The mode that 41a suitable position 55a in minor face end rides over pressed compact material ring 45 configures the situation of metallic plate 55.Shown in Figure 17 (a)
Configuration is the scope of the present invention.
Eccentric swage scope is changed using the eccentric swage 53 of 3 types shown in Figure 18.Figure 18 (a) is pressing metal
The figure of the part at the position suitable with flexing portion 41b of plate 55, Figure 18 (b) is the pressing position suitable with flexing portion 41b
Overall figure, Figure 18 (c) is the figure of the pressing entirety at position suitable with top plate portion 41.Figure 18 (b) and the pressure shown in Figure 18 (c)
Glassware scope is the scope of the present invention.In Figure 18 (b) and Figure 18 (c), the circular shape of eccentric swage 53 is bent with top plate portion 41
The circular shape of pars convoluta 41b is consistent.In Figure 18 (a) by the part of enclosed with dashed lines and Figure 18 (b) and Figure 18 (c) by dotted line
The part impaling with circular arc corresponds to the part being impaled by circular arc D, tangent line L1 and tangent line L2 in Fig. 7.Each bar according to table 1
It is as shown in table 2 that part carries out stamping forming result.
[table 2]
[table 2]
| Condition | Flange part crackle | Flange part fold | Top plate portion fold | Shoulder R portion crackle | Overall merit |
| Example 1 of the present invention | ○ | ◎ | ◎ | ○ | OK |
| Example 2 of the present invention | ○ | ◎ | ◎ | ○ | OK |
| Example 3 of the present invention | ○ | ○ | ◎ | ○ | OK |
| Example 4 of the present invention | ○ | ◎ | ◎ | ○ | OK |
| Example 5 of the present invention | ○ | ◎ | ◎ | ○ | OK |
| Example 6 of the present invention | ○ | ◎ | ◎ | ○ | OK |
| Example 7 of the present invention | ○ | ◎ | ◎ | ○ | OK |
| Example 8 of the present invention | ○ | ◎ | ◎ | ○ | OK |
| Example 9 of the present invention | ○ | ◎ | ◎ | ○ | OK |
| Example 10 of the present invention | ○ | ◎ | ◎ | ○ | OK |
| Example 11 of the present invention | ○ | ◎ | ○ | ○ | OK |
| Comparative example 1 | ○ | × | ○ | ○ | NG |
| Comparative example 2 | ○ | ◎ | × | ○ | NG |
| Comparative example 3 | ○ | ◎ | × | ○ | NG |
| Comparative example 4 | ○ | ◎ | ○ | × | NG |
| Comparative example 5 | ○ | ◎ | × | × | NG |
Assessment item is the crackle of flange part 43 and splitting of the shoulder R portion of fold, the fold of top plate portion 41 and drift 47
Stricture of vagina.The evaluation of fold is observed to carry out by visual observation.In table 2 it is impossible to observe that the situation of fold is denoted as ◎, is able to observe that
The situation of small fold is denoted as zero, be able to observe that the situation of obvious fold be denoted as ×.In addition, the evaluation of crackle also by
Visually observe to carry out.In table 2 it is impossible to observe that the situation of crackle is denoted as zero, be able to observe that the situation of crackle be denoted as ×.
And, also carry out the overall merit of fold and crackle.In table 2, evaluate good situations and be denoted as OK, evaluate bad situation note
Make NG.
As shown in table 2, in example 1～example 11 of the present invention of the present invention, there is not crackle, the crackle in shoulder R portion of flange part 43,
There is not fold or fold is less, obtain good overall merit.On the other hand, in comparative example 1～comparative example 5, comprehensively comment
Valency is bad.In comparative example 1, pressed compact material ring compression as little as 0.3MPa, therefore produce fold in flange part 43.In comparative example 2
In, eccentric swage pressure as little as 1.0MPa, therefore produce fold in top plate portion 41.In comparative example 3, eccentric swage extrusion position is
75%, start moment by laminated metal sheet 55 using eccentric swage 53 later, therefore cannot fully suppress the fold of top plate portion 41.?
In comparative example 4, such as shown in Figure 17 (b), the position 55a suitable with minor face end 41a of metallic plate 55 rides over pressed compact material ring 45, because
This cracks in shoulder R portion.In comparative example 5, there is not eccentric swage, therefore produce fold in top plate portion 41, metallic plate 55
The position 55a suitable with minor face end 41a rides over pressed compact material ring 45, therefore cracks in shoulder R portion.
As described above, in the present embodiment, in punch forming front pillar 40, even with the low superhigh intensity of ductility
High strength steel is not it is also possible to increasing molding procedure number and realizing the suppression of fold and avoiding of crackle.
Embodiment 2
Embodiment 1 is the embodiment for front pillar 40 (having the part in L-shaped shape portion).Next, in the present embodiment,
To the part with T-shaped portion that is, center pillar 23 (with reference to Fig. 9 and Figure 10) is also carried out experiment same as Example 1, and
It is described.In the present embodiment, eccentric swage is same as Example 1, links cylinder and produces load, eccentric swage prominent
The adjustment of out position is also same as Example 1.In addition, metallic plate 35 (thickness of slab also same as Example 1 used in experiment
The tensile strength 980MPa level of 1.4mm and 1180MPa level cold-rolled steel sheet).
Punch forming be make pressed compact material ring compression (MPa), eccentric swage pressure (MPa), eccentric swage extrusion position (%) and
Metallic plate configuration variation is simultaneously combined and carries out under multiple conditions.Punch forming condition shown in table 3.Pressed compact material ring
Pressure, eccentric swage pressure and eccentric swage extrusion position are same as Example 1, and therefore the description thereof will be omitted.The configuration of metallic plate 35
As shown in figure 19, there are two kinds.Figure 19 (a) is with metallic plate 35 and horizontal edge end 25a, horizontal edge end 25b, horizontal edge end
The mode that 25c and horizontal edge end 25d suitable position 35a, 35b, 35c and 35d do not ride over pressed compact material ring 33 configures metal
The situation of plate 35, Figure 19 (b) is with metallic plate 35 and horizontal edge end 25a, horizontal edge end 25b, horizontal edge end 25c and horizontal edge
The mode that end 25d suitable position 35a, 35b, 35c and 35d ride over pressed compact material ring 33 configures the situation of metallic plate 35.Figure
Configuration shown in 19 (a) is the scope of the present invention.Additionally, in the example of the present invention 12～example 20 of the present invention of table 3, comparative example 6～ratio
Compared with example 9 whole in, eccentric swage scope is the scope of linking part 25e that the middle thick line shown in pressing Fig. 9 is surrounded.
[table 3]
[table 3]
As shown in table 3, the condition shown in example 12～example 20 of the present invention of the present invention is above-mentioned pressed compact material ring compression, eccentric swage
Pressure, eccentric swage extrusion position and metallic plate configuration all conditions within the scope of the invention.Comparative example 6～comparative example 9
Be including the scope of the invention outside condition.Stamping forming result is carried out according to each condition of table 3 as shown in table 4.
[table 4]
[table 4]
| Condition | Flange part crackle | Flange part fold | Top plate portion fold | Shoulder R portion crackle | Overall merit |
| Example 12 of the present invention | ○ | ◎ | ◎ | ○ | OK |
| Example 13 of the present invention | ○ | ◎ | ◎ | ○ | OK |
| Example 14 of the present invention | ○ | ○ | ◎ | ○ | OK |
| Example 15 of the present invention | ○ | ◎ | ◎ | ○ | OK |
| Example 16 of the present invention | ○ | ◎ | ◎ | ○ | OK |
| Example 17 of the present invention | ○ | ◎ | ◎ | ○ | OK |
| Example 18 of the present invention | ○ | ◎ | ◎ | ○ | OK |
| Example 19 of the present invention | ○ | ◎ | ◎ | ○ | OK |
| Example 20 of the present invention | ○ | ◎ | ◎ | ○ | OK |
| Comparative example 6 | ○ | × | ◎ | ○ | NG |
| Comparative example 7 | ○ | ◎ | × | ○ | NG |
| Comparative example 8 | ○ | ◎ | × | ○ | NG |
| Comparative example 9 | ○ | ◎ | ◎ | × | NG |
The observational technique of table 4 is identical with table 2, and therefore the description thereof will be omitted.As shown in table 4, in example 12～present invention of the present invention
In example 20, there is not the crackle of the crackle of flange part 29 and fold, the fold of top plate portion 25 and shoulder R portion, obtain good comprehensive
Close and evaluate.On the other hand, in comparative example 6～comparative example 9, overall merit is bad.In comparative example 6, pressed compact material ring compression is low
To 0.4MPa, therefore produce fold in flange part 29.In comparative example 7, eccentric swage pressure as little as 1.0MPa, therefore in top plate portion
25 generation folds.In comparative example 8, eccentric swage extrusion position is 70%, starts the moment by laminated metal sheet 35 using eccentric swage
Later, therefore cannot suppress the fold of top plate portion 25.In comparative example 9, metallic plate 35 is as shown in Figure 19 (b), metallic plate 35
With horizontal edge end 25a, horizontal edge end 25b, horizontal edge end 25c and suitable position 35a, 35b, the 35c of horizontal edge end 25d and
35d rides over pressed compact material ring 33, therefore cracks in shoulder R portion.
As described above, in the present embodiment, when punch forming center pillar 23 (there is the part in T-shaped portion), even with
The high strength steel of the low superhigh intensity of ductility is not it is also possible to increasing molding procedure number and realizing suppression and the crackle of fold
Avoid.
More than, embodiments of the present invention are illustrated, but the present invention not by the composition of present embodiment this
The above of a bright disclosed part and limit.That is, completed by those skilled in the art etc. according to present embodiment
Other embodiment, embodiment and application technology etc. are entirely included in scope of the invention.
Industrial utilization probability
In accordance with the invention it is possible to providing a kind of high strength steel of the superhigh intensity low even with ductility, having
Top view is in also can not to increase in the L-shaped shape portion of L-shaped shape or the part in T-shaped portion of top view shape in T shape
Add-on type process number and realize the suppression of fold and the impact forming method avoiding of crackle.
Description of reference numerals：
D ... circular arc；L1, L2 ... tangent line；S ... area；1 ... L-shaped shape part；2 ... top plate portions；2a ... minor face end；
2b ... flexing portion；3 ... longitudinal wall part；4 ... flange parts；5 ... punch-forming molds；6 ... drifts；6a ... forming surface；7 ... punch dies；
7a ... depressed part；7b ... peristome；7c ... clamping face；9 ... pressed compact material rings；9a ... peristome；11 ... eccentric swages；13 ... backing plates；
15 ... sliding parts；17 ... metallic plates；17a ... position；19 ... cushion pins；21 ... cylinders；23 ... center pillars；25 ... top plate portions；25a、
25b, 25c, 25d ... horizontal edge end；25e ... linking part；27 ... longitudinal wall part；29 ... flange parts；32 ... drifts；33 ... pressed compact material
Ring；35 ... metallic plates；35a, 35b, 35c, 35d ... position；40 ... front pillars；41 ... top plate portions；41a ... minor face end；41b ... bends
Pars convoluta；42 ... longitudinal wall part；43 ... flange parts；44 ... cushion pins；45 ... pressed compact material rings；45a ... peristome；47 ... drifts；51…
Punch die；51a ... depressed part；51b ... peristome；53 ... eccentric swages；55 ... metallic plates；55a ... position.
Claims (2)
1. a kind of impact forming method, using the punch-forming mold with drift, punch die, pressed compact material ring and eccentric swage, comes
Metallic plate punch forming is become to possess top plate portion, longitudinal wall part and flange part and there is the L-shaped shape that top view is in L-shaped shape
The part in portion, described drift has forming surface, and described punch die has forming surface corresponding with this drift, described pressed compact material ring with
Described metallic plate is clamped, described eccentric swage and drift coordinate to clamp a part for described metallic plate, described vertical between this punch die
Wall portion is formed at around this top plate portion, and described flange part is continuously formed with this longitudinal wall part,
Described impact forming method is characterised by having：
Metallic plate arrangement step, with this metallic plate and the described part with the L-shaped shape portion that top view is in L-shaped shape
The mode that the suitable position in the end of minor face does not ride over described pressed compact material ring configures described metallic plate；
Metallic plate clamps operation, is clamped with described pressed compact material ring using described punch die and is configured to by this metallic plate arrangement step
Described metallic plate on pressed compact material ring；
Molding procedure, leads to respect to being pushed drift by the described metallic plate of described punch die and the state of described pressed compact material ring clamping
Cross drawing process and molding is carried out to described metallic plate；And
Eccentric swage pressing process, described metallic plate clamping operation after, described molding procedure midway utilize described drift with
Described eccentric swage exists come the flexing portion at least including L-shaped shape to press the position suitable with described top plate portion of described metallic plate
Interior position,
This eccentric swage pressing process is with respect to coming into contact with from described drift and described metallic plate in described molding procedure
Form depth to bottom dead center position for the position is that 0%～50% position starts,
Described metallic plate clamps in operation
More than 0.7MPa,
In described eccentric swage pressing process using the average pressure that described drift presses described metallic plate with described eccentric swage it is
More than 3MPa.
2. a kind of impact forming method, using the punch-forming mold with drift, punch die, pressed compact material ring and eccentric swage, comes
Metallic plate punch forming is become to possess top plate portion, longitudinal wall part and flange part and have the T-shaped of top view shape in T shape
The part in portion, described drift has forming surface, and described punch die has forming surface corresponding with this drift, described pressed compact material ring with
Described metallic plate is clamped, described eccentric swage and drift coordinate to clamp a part for described metallic plate, described vertical between this punch die
Wall portion is formed at around this top plate portion, and described flange part is continuously formed with this longitudinal wall part,
Described impact forming method is characterised by having：
Metallic plate arrangement step, with this metallic plate and the part in the described T-shaped portion with top view shape in T shape
The mode that the suitable position in the end of horizontal edge does not ride over described pressed compact material ring configures described metallic plate；
Metallic plate clamps operation, is clamped with described pressed compact material ring using described punch die and is configured to by this metallic plate arrangement step
Described metallic plate on pressed compact material ring；
Molding procedure, leads to respect to being pushed drift by the described metallic plate of described punch die and the state of described pressed compact material ring clamping
Cross drawing process and molding is carried out to described metallic plate；And
Eccentric swage pressing process, described metallic plate clamping operation after, described molding procedure midway utilize described drift with
Described eccentric swage come to press described metallic plate the position suitable with described top plate portion at least include T-shaped horizontal edge with vertical
The linking part on side in interior position,
This eccentric swage pressing process is with respect to coming into contact with from described drift and described metallic plate in described molding procedure
Form depth to bottom dead center position for the position is that 0%～50% position starts,
Described metallic plate clamps in operation
More than 0.7MPa,
In described eccentric swage pressing process using the average pressure that described drift presses described metallic plate with described eccentric swage it is
More than 3MPa.
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| JP2013-122360 | 2013-06-11 | ||
| JP2013122360A JP5664704B2 (en) | 2013-06-11 | 2013-06-11 | Press forming method |
| PCT/JP2014/061581 WO2014199730A1 (en) | 2013-06-11 | 2014-04-24 | Press molding method |
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| JP6179527B2 (en) * | 2015-01-16 | 2017-08-16 | Ｊｆｅスチール株式会社 | Press forming method |
| JP6202019B2 (en) * | 2015-02-25 | 2017-09-27 | Ｊｆｅスチール株式会社 | Press forming method |
| MX392221B (en) | 2015-03-31 | 2025-03-21 | Jfe Steel Corp | DIE CASTING METHOD, METHOD OF MANUFACTURING A COMPONENT WITH THE DIE CASTING METHOD, AND COMPONENT MANUFACTURED WITH THE DIE CASTING METHOD. |
| JP6376048B2 (en) * | 2015-06-16 | 2018-08-22 | トヨタ車体株式会社 | Press molding method and press mold |
| CA3019767C (en) | 2016-04-04 | 2019-02-12 | Nippon Steel & Sumitomo Metal Corporation | Method for producing press-formed product and production line thereof |
| JP6969133B2 (en) * | 2016-05-10 | 2021-11-24 | 日本製鉄株式会社 | Molded body with stretch flange and its manufacturing method |
| MX2019003975A (en) | 2016-10-05 | 2019-08-01 | Nippon Steel Corp | Method and device for manufacturing press formed article. |
| JP2021041447A (en) | 2019-09-13 | 2021-03-18 | トヨタ自動車株式会社 | Manufacturing device and manufacturing method of hat-shaped cross section component having curvature protrusion part |
| JP6753502B1 (en) * | 2019-09-30 | 2020-09-09 | Ｊｆｅスチール株式会社 | Press forming method and press forming equipment for automobile outer panel |
| EP4043116A4 (en) * | 2019-10-02 | 2022-11-30 | JFE Steel Corporation | PRESS FORMING METHOD AND PRESS FORMING APPARATUS FOR AN AUTOMOTIVE EXTERIOR PANEL |
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| JP2004344925A (en) * | 2003-05-22 | 2004-12-09 | Nippon Steel Corp | Press molding die apparatus and press molding method |
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| ES2600402T3 (en) | 2010-11-24 | 2017-02-08 | Nippon Steel & Sumitomo Metal Corporation | Method to manufacture an L-shaped product |
| JP5631258B2 (en) * | 2011-04-28 | 2014-11-26 | 本田技研工業株式会社 | Manufacturing method of automobile side panel |
| JP2016155158A (en) | 2015-02-25 | 2016-09-01 | ダイハツ工業株式会社 | Hemming processing method |
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2013
- 2013-06-11 JP JP2013122360A patent/JP5664704B2/en active Active
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- 2014-04-24 KR KR1020157033765A patent/KR101688475B1/en active Active
- 2014-04-24 WO PCT/JP2014/061581 patent/WO2014199730A1/en active Application Filing
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| JP2002282950A (en) * | 2001-03-28 | 2002-10-02 | High Frequency Heattreat Co Ltd | Manufacturing method for flanged part, apparatus for heat treatment, and method therefor |
| CN101868309A (en) * | 2007-11-21 | 2010-10-20 | 丰田自动车株式会社 | Press forming method and press forming device |
| JP2010036217A (en) * | 2008-08-05 | 2010-02-18 | Sumitomo Metal Ind Ltd | Manufacturing method of center pillar outer panel, and blank for center pillar outer panel |
| CN101786122A (en) * | 2009-01-26 | 2010-07-28 | 本田技研工业株式会社 | Press-die and press-processing method |
| EP2524740A1 (en) * | 2011-05-19 | 2012-11-21 | Nippon Steel Corporation | Press-forming method of component having L shape |
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| Publication number | Publication date |
|---|---|
| JP5664704B2 (en) | 2015-02-04 |
| WO2014199730A1 (en) | 2014-12-18 |
| KR20160003795A (en) | 2016-01-11 |
| CN105307792A (en) | 2016-02-03 |
| JP2014240078A (en) | 2014-12-25 |
| KR101688475B1 (en) | 2016-12-21 |
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