CN102485371A - Stamping mould for forming work piece with local inner concave part - Google Patents

Stamping mould for forming work piece with local inner concave part Download PDF

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Publication number
CN102485371A
CN102485371A CN2010105788018A CN201010578801A CN102485371A CN 102485371 A CN102485371 A CN 102485371A CN 2010105788018 A CN2010105788018 A CN 2010105788018A CN 201010578801 A CN201010578801 A CN 201010578801A CN 102485371 A CN102485371 A CN 102485371A
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CN
China
Prior art keywords
stamping die
pressing
flexible
block
local
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Granted
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CN2010105788018A
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Chinese (zh)
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CN102485371B (en
Inventor
马小喆
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Beiqi Foton Motor Co Ltd
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Beiqi Foton Motor Co Ltd
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Priority to CN201010578801.8A priority Critical patent/CN102485371B/en
Publication of CN102485371A publication Critical patent/CN102485371A/en
Application granted granted Critical
Publication of CN102485371B publication Critical patent/CN102485371B/en
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Abstract

The invention provides a stamping mould for forming a work piece with a local inner concave part; the stamping mould comprises an upper mould (1) and a lower mould (2); a convex hull (12) which is used for forming the local inner concave part is formed on the upper mould (1); a through hole (3) is formed at a position which corresponds to the convex hull (12) on the lower mould (2); the stamping mould also comprises a pressing device (4); the pressing device (4) comprises a pressing block (41) and an elastic element (45); and one end of the elastic element (45) is arranged on the lower mould (2) and the other end of the elastic element (45) elastically supports the pressing block (41), so that the pressing block (41) passes through the through hole (3) and can move up and down. After the stamping mould is adopted to form the work piece with the local inner concave part, when a drawing step is carried out, the pressing at the local inner concave part can be ensured to be stable, a material on the corner of the local inner concave part deforms fully, and wrinkling is prevented.

Description

Be used for the stamping die that moulding has the workpiece of local indent
Technical field
The present invention relates to the punching press field.
Background technology
Car door assembly is accomplished through coating technique, wrapping process, local spot-welding technology by inner plate of car door assembly and door skin, and the rigid demand of car door assembly is mainly satisfied by the inner plate of car door assembly, and door skin then mainly satisfies the outward appearance demand of car door.For the appurtenances on the car door are installed,, should there be local indent in door skin digital-to-analogue part like door handle, following visor etc.The stamping die that draws door skin generally comprises upper die and lower die, on patrix, also has in order to form the convex closure of local indent usually.During drawing and moulding, the convex closure elder generation contact material of the local indent of moulding on die face, but door skin is with respect to inner plate of car door material thickness, poor rigidity; And closure pressing speed is very fast; Material flows uncontrolledly here under no binder state, produces and flows inhomogeneously, flows than the material flow difficulties at straight line place at the material of the corner of local indent; Still have little time distortion after matched moulds is accomplished, therefore can produce material in the corner of local indent and pile up.Can see more significantly that there is fold in the corner in local indent after spraying paint, be difficult to satisfy the requirement of vehicle body presentation quality.
Generally, replenish adjustment, the wrinkling improvement through pressure adjustment or technology when drawing.Alleviate wrinkling around the local indent such as reducing pressure or slowing down closure pressing speed, but this will influence production efficiency greatly.Sometimes can replenish through technology and improve local indent wrinkling phenomenon on every side.As shown in Figure 1 is typical passenger door outside plate sketch map, and the door handle installation place 01 among the figure is the local indent described in the preceding text with following visor installation place 03.Because down visor installation place 03 be a through hole, follow-up also have flanging process as replenishing technology, can fill and lead up local indent, and shaping can cover wrinkling zone on every side after the deburring, can't influence the outward appearance of door skin.
But be not that each local interior recess all has technology to replenish,, at this moment just do not have follow-up technology to replenish as when drawing the handle installation place 01 that forms among Fig. 1.When the door skin shown in drawing and moulding Fig. 1; The material at 01 place, handle installation place flows as shown in Figure 3; As can be seen from the figure, pile up more easily than straight flange place material, form fold at the material at four fillet places; Wrinkling area 02 in that its four corners produce is left at last, influences the outward appearance of whole door skin.
Can improve local indent wrinkling on every side though when drawing, replenish adjustment sometimes through pressure adjustment or technology; But when mould shunting or production programming adjustment need to change production equipment, also need replenish technology and carry out accommodation adjusted drawing, waste time and energy according to the equipment of having changed; And wrinkling problem finally can not thoroughly solve; Can only leave over the application workshop and play putty by hand, increase cost, reduce production efficiency.
Summary of the invention
The object of the present invention is to provide a kind of stamping die that moulding has the workpiece of local indent that is used for, can control the speed of depressing at local indent place when drawing, material is flowed evenly, thereby it is wrinkling to avoid local indent to produce on every side.
In order to achieve the above object, the present invention is a kind of to be used for the stamping die that moulding has the workpiece of local indent, and said stamping die comprises upper die and lower die; Be formed with on the said patrix in order to form the convex closure of said local indent; Wherein, at said counterdie) upward being formed with through hole with the corresponding position of said convex closure, said stamping die also comprises material pressing device; Said material pressing device comprises binder block and flexible member; One end of said flexible member is installed on the said counterdie, and the said binder block of other end resiliency supported makes said binder block pass said through hole and can move up and down.
Preferably, the end surface shape of the end face shape of said binder block and said convex closure coupling.
Preferably, before said upper die and lower die closure, the end face of said binder block is not less than the end face of said through hole.
Usually, said counterdie has the lightening core that communicates with said through hole, and said material pressing device is arranged in the said lightening core.
Preferably, said stamping die also comprises guide rail, and this guide rail is formed on the wall of said lightening core, is used to guide said binder block to move up and down.
Usually, said material pressing device also comprises guide plate and guide plate frame, and said guide plate chord position is fixedly connected between said binder block and said flexible member and with said binder block, and said guide plate is fixedly mounted on the side of said guide plate frame, is slidingly matched with said guide rail.
Preferably, said material pressing device also comprises at least one limited block, and said limited block is fixed on the upper surface of said guide plate frame.
Usually, said material pressing device also comprises base plate, and said flexible member is installed on the said counterdie through said base plate.
Usually, said material pressing device also comprises cushion block, and this cushion block is installed on the said base plate, and said flexible member is installed on the said cushion block.
Preferably, said material pressing device also comprises at least two back-up blocks, these at least two back-up blocks be installed on said base plate or the cushion block and be positioned at said flexible member around.
Preferably, said flexible member is a nitrogen spring.
Preferably, the above part of the convex closure of said patrix is not established lightening core, is provided with counterbore in the bottom of said patrix and with the corresponding position of said convex closure, and is installed with the adjustment piece in the said counterbore, and the end face of said adjustment piece exceeds the end face of counterbore.
Through adopting stamping die of the present invention; In the time of can guaranteeing to draw; The recess binder is stable in local, and material flows evenly, and deals with the dynamic equilibrium problems of punching production through adjustment adjustment piece; Simple adjustment can be accomplished the adaptability coupling of mould and lathe, thereby has avoided wrinkling generation around local indent.
Description of drawings
Shown in Figure 1 is the car door sketch map;
Shown in Figure 2 is the A-A cutaway view of Fig. 1;
Shown in Figure 3 is local indent material around flow schematic diagram among Fig. 1;
When a kind of embodiment of adjustment structure according to the invention that shown in Figure 4 is is installed in the car door stamping die shown in moulding Fig. 1, the sketch map when upper and lower mould separates;
Sketch map when the stamping die described in Fig. 4 shown in Figure 5 is closed;
The vertical view of the material pressing device that shown in Figure 6 is adopts among Fig. 4;
Shown in Figure 7 is the front view of the material pressing device shown in Fig. 4;
When the another kind of embodiment of adjustment structure according to the invention shown in Figure 8 is installed in the car door stamping die shown in moulding Fig. 1, the sketch map when upper and lower mould is closed;
Material pressing device stereogram among Fig. 8 shown in Figure 9;
Shown in Figure 10 is the decomposition view of Fig. 9;
Reference numeral
01 handle installation place
02 wrinkling district
03 time visor installation place
1 patrix
The 1a counterbore
2 counterdies
21 guide rails
22 lightening cores
3 through holes
4 material pressing devices
5 adjustment pieces
41 binder blocks
42 guide plate framves
The 42a limited block
43 guide plates
44 back-up blocks
45 flexible members
46 cushion blocks
47 base plates
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment, adjusting device of the present invention is carried out detailed description.
As shown in Figure 4, the present invention provides a kind of stamping die that moulding has the workpiece of local indent that is used for, and said stamping die comprises patrix 1 and counterdie 2; Be formed with convex closure 12 on the said patrix 1 in order to form said local indent; Wherein, on said counterdie 2, be formed with through hole 3 with said convex closure 12 corresponding positions, said stamping die also comprises material pressing device 4; Said material pressing device 4 comprises binder block 41 and flexible member 45; One end of said flexible member 45 is installed on the said counterdie 2, and the said binder block 41 of other end resiliency supported makes said binder block 41 pass said through hole 3 and can move up and down.
During matched moulds, the convex closure 12 on the patrix 1 at first contacts plate to be formed.Because the binder block 41 of material pressing device 4 passes the through hole 3 on the counterdie 2; After matched moulds proceeds to a certain degree; Convex closure 12 can contact with binder block 41 through plate; Because binder block 41 belows are flexible member 45, under the elastic force effect of flexible member 45, binder block 41 clamps plate with convex closure 12 jointly.After plate clamps; Sheet metal deformation between binder block 41 and the convex closure 12 is controlled, and no longer is in free state, and plate flows slower than no binder state; And the material attenuate quantitative change that should locate is little; If will form the local indent of size constancy, the excess stock that is deposited in local indent corner so must be out of shape fully, so just eliminates material at these regional folds.
Because binder block 41 can move up and down under the promotion of flexible member 45, this has just guaranteed the lasting contact between plate, convex closure 12 and binder block 41 threes in drawing process, that is, plate flows to be in and continues controlled state, and distortion also relatively evenly.
Certainly, the shape top of through hole 3 is consistent with local concave shape on the workpiece to be formed here, can successfully move up and down in order to guarantee binder block 41, and the bottom of through hole 3 should be straight wall through hole.After matched moulds was accomplished, the upper surface of binder block 41 was concordant with the straight hole part upper surface of through hole 3.
Preferably, the end face shape of said binder block 41 and the end surface shape of said convex closure 12 should be mated, and be as shown in Figure 6, helps tighter clamping plate like this and mold the accurate local concave shape of shape.
Generally speaking, before said patrix 1 and counterdie 2 closures, the end face of said binder block 41 is not less than the end face of said through hole 3.Such advantage is: if the end face of binder block 41 is lower than the end face of said through hole 3; Plate is placed on the counterdie 2 with free state, and plate self has certain weight, make plate under the gravity effect in through hole 3 place's indents; Thereby form microdefect along through hole 3 peripheries, unfavorable to moulding.
If the end face of binder block 41 is not less than the end face of through hole 3, just to being placed on the effect that plate on the counterdie 2 plays a support, having eliminated plate and surrounded and watched defective around the through hole 3, improved the original state of plate, favourable to moulding.
In order to alleviate the overall weight of mould; Always be provided with lightening core on the upper and lower mould of mould; Can have the lightening core 22 that communicates with said through hole 3 in the present invention on the counterdie 2; Pressure apparatus 4 is arranged in the said lightening core 22, has increased the installing space of material pressing device 4, thereby the installation process of material pressing device 4 is more prone to.
Preferably, said stamping die can also comprise guide rail 21, and this guide rail 21 is formed on the wall of said lightening core 22, is used to guide said binder block 41 to move up and down, and makes material pressing device 4 more stable.For example, guide rail 21 can be cast on the wall of lightening core 22 when casting counterdie 2.
Can directly on binder block 41, form the guide plate that matches with guide rail 21.
Wearing and tearing appear in part easily that be slidingly matched with guide rail 21, and in order to change conveniently, preferably, material pressing device 4 can also comprise guide plate 43 and guide plate frame 42, like Fig. 9 and shown in Figure 10.Said guide plate frame 42 is fixedly connected between said binder block 41 and said flexible member 45 and with said binder block 41, and said guide plate 43 is fixedly mounted on the side of said guide plate frame 42, is slidingly matched with said guide rail 21, and is as shown in Figure 8.Processing only needs processing guide plate 43 get final product during with the mating surface of guide rail 21, also only needs replacing guide plate 43 to get final product during replacing.
For the upper surface and the mould of the jack-up that prevents flexible member 45 guide plate frame 42 when out of control produces the damaged in collision mould, preferably material pressing device 4 can also comprise at least one limited block 42a, and said limited block 42a is fixed on the upper surface of said guide plate frame.
The shape of 42a can be an arbitrary form, as long as have certain thickness, under flexible member 45 jack-up situation out of control, limited block 42a contacts with the upper surface of lightening core 22, prevented material pressing device further on move.
For easy for installation, preferably, said material pressing device 4 can also comprise base plate 47, and said flexible member 45 is installed on the said counterdie 2 through said base plate 47.
Most of flexible member is a standard component all, has relatively-stationary housing height, spends low for fear of the housing height of selected flexible member 45; Be not suitable for installing, preferably, said material pressing device 4 can also comprise cushion block 46; This cushion block 46 is installed on the base plate 47; Said flexible member 45 is installed on the said cushion block 46, in case after the model of flexible member 45 was selected, the height that can adjust cushion block 46 came elastic elements 45.
Binder block 41 is fixed together with guide plate frame 42; The two is supported by flexible member 45; The assembling of binder block 41, guide plate frame 42 and flexible member 45 for ease, preferably, material pressing device 4 can also comprise at least two back-up blocks 44; After the elastic elements 45 back-up block 44 can be installed around flexible member 45; When carrying out next step installation, can the binder block that be fixed together 41, guide plate frame 42 and guide plate 43 be supported on back-up block 44 tops, so just avoid phenomenons such as binder block 41 occurs toppling over guide plate frame 42 when assembling material pressing device 4, instability.
Introduce the assembling process of the material pressing device 4 shown in Fig. 9 below.
When the said material pressing device 4 of assembling, earlier cushion block 46 is installed on the backing plate 47, for example can cushion block 46 be connected with backing plate 47, then flexible member 45 is fixed on the cushion block 46, subsequently at flexible member 45 at least two back-up blocks 44 of installation on every side through bolt.Back-up block 44 installs the back and just can the guide plate frame 43 that link together with binder block 41 be supported on the back-up block 44.Certainly, guide plate 43 can be installed before guide plate frame 42 is installed, and also can after guide plate frame 42 is installed, install.
The material pressing device 4 of assembled is put into the lightening core 22 of counterdie 2, and guide plate 43 and guide rail 21 are slidingly matched, guiding binder block 41 passes the through hole 3 on the counterdie 2.Then material pressing device 4 and counterdie are connected as a single entity.
Preferably, said flexible member 45 is a nitrogen spring.The advantage of nitrogen spring has a lot, such as, the elastic force of nitrogen spring can be regulated, and maximum can reach several tons.The own vol of nitrogen spring is less and service life is longer, is well suited for being used in the mould.
Introduce the course of work of a kind of embodiment of the stamping die according to the invention shown in Fig. 8 below.
Before the matched moulds, the binder block 41 of material pressing device 4 is supporting plate, and the plate holder is flat.During matched moulds, patrix 1 when the convex closure on the patrix 1 12 touches plate, can receive the elastic force of the binder block 41 of plate below material pressing device 4 towards counterdie 2 motions.The end face shape of binder block 41 and the end surface shape of convex closure 12 are complementary, and like this, the material is here closely grasped.In the process that patrix 1 continues to move towards counterdie 2; Binder block 41 continues to descend under the guiding function of guide rail 21; The material deformation that is held is smaller; In order to form complete local indent, the material that is deposited in local indent corner begins abundant distortion, thereby after whole drawing process finishes, has eliminated the wrinkling district of local indent corner.
When the car door punching production, there is certain surface jitter degree in the patrix of mould as the bottom surface, so also might cause local interior recess pressure transient; It is wrinkling to cause local indent to produce equally on every side; So, preferably, shown in Fig. 3, Fig. 4 and Fig. 7; The part of convex closure more than 12 can not established lightening core on patrix 1; Be provided with counterbore 1a in the bottom of said patrix 1 and with said convex closure 12 corresponding positions, fixed installation adjustment piece 5 in said counterbore 1a, the end face of said adjustment piece 5 exceeds the end face of counterbore 1a.
Adjustment piece adjustment piece increases above convex closure 12 to be adjusted the flatness that piece 5 can reduce patrix 1 bottom and beats, thereby makes the pressure at convex closure 12 places more stable, helps alleviating wrinkling.
Same set of mould uses on different lathes possibly; And different platen surface accuracies and stamping-out speed all there are differences; Therefore also be with the advantage that convex closure 12 corresponding places increase adjustment piece 5 in patrix 1 bottom; When the replacing lathe was produced, the thickness that only needs to change adjustment piece 5 just can reach adaptability cooperation fast between stamping die and the lathe.
The end face of adjustment piece 5 generally will exceed the end face of counterbore 1a, and according to the situation of beating of patrix 1 base plane degree, the end face of adjustment piece 5 is generally than the high 0.1~0.3mm of end face of counterbore 1a.
Certainly; It is constant adjustment piece 5 to be set at thickness, can in counterbore 1a, pad be set, and so just can adjust the height of piece 5 through the mode of increase and decrease pad; The briquetting pressure of recess in thereby adjustment is local realizes adaptability cooperation fast between mould and the lathe more easily.
Through adopting stamping die of the present invention; Local indent place binder is stable in the time of can guaranteeing to draw; Make that local indent corner material deformation is abundant; And deal with the dynamic equilibrium problems of punching production through adjustment adjustment piece, the adaptability that simple adjustment can be accomplished mould and lathe is mated, thereby has avoided wrinkling generation.
What should explain at last is: above embodiment and accompanying drawing are only in order to technical scheme of the present invention to be described but not limit it; Although the present invention has been carried out detailed explanation with reference to preferred embodiments; Those of ordinary skill in the art is to be understood that: it still can make amendment or be equal to replacement technical scheme of the present invention, also can not make amended technical scheme break away from the spirit and the scope of technical scheme of the present invention and these are revised or be equal to replacement.

Claims (13)

1. one kind is used for the stamping die that moulding has the workpiece of local indent; Said stamping die comprises patrix (1) and counterdie (2), is formed with the convex closure (12) in order to form said local indent on the said patrix (1), it is characterized in that; Upward be formed with through hole (3) at said counterdie (2) with the corresponding position of said convex closure (12); Said stamping die also comprises material pressing device (4), and said material pressing device (4) comprises binder block (41) and flexible member (45), and an end of said flexible member (45) is installed on the said counterdie (2); The said binder block of other end resiliency supported (41) makes said binder block (41) pass said through hole (3) and can move up and down.
2. stamping die according to claim 1 is characterized in that, the end surface shape coupling of the end face shape of said binder block (41) and said convex closure (12).
3. stamping die according to claim 1 is characterized in that, before said patrix (1) and counterdie (2) closure, the end face of said binder block (41) is not less than the end face of said through hole (3).
4. stamping die according to claim 1 is characterized in that, said counterdie (2) has the lightening core (22) that communicates with said through hole (3), and said material pressing device (4) is arranged in the said lightening core (22).
5. according to the described stamping die of power claim 4, it is characterized in that said stamping die also comprises guide rail (21), this guide rail (21) is formed on the wall of said lightening core (22), is used to guide said binder block (41) to move up and down.
6. according to the described stamping die of power claim 5; It is characterized in that; Said material pressing device (4) also comprises guide plate (43) and guide plate frame (42); Said guide plate frame (42) is positioned between said binder block (41) and the said flexible member (45) and with said binder block (41) and is fixedly connected, and said guide plate (43) is fixedly mounted on the side of said guide plate frame (42), is slidingly matched with said guide rail (21).
7. stamping die according to claim 6 is characterized in that, said material pressing device (4) also comprises at least one limited block (42a), and said limited block (42a) is fixed on the upper surface of said guide plate frame.
8. stamping die according to claim 7 is characterized in that, said material pressing device (4) also comprises base plate (47), and said flexible member (45) is installed on the said counterdie (2) through said base plate (47).
9. stamping die according to claim 8 is characterized in that, said material pressing device (4) also comprises cushion block (46), and this cushion block (46) is installed on the said base plate (47), and said flexible member (45) is installed on the said cushion block (46).
10. stamping die according to claim 9; It is characterized in that; Said material pressing device (4) also comprises at least two back-up blocks (44), these at least two back-up blocks (44) be installed in said base plate (47) or cushion block (46) go up and be positioned at said flexible member (45) around.
11., it is characterized in that said flexible member (45) is a nitrogen spring according to any described stamping die among the claim 1-10.
12. stamping die according to claim 11; It is characterized in that; Part more than the convex closure (12) of said patrix (1) is not established lightening core; Be provided with counterbore (1a) in the bottom of said patrix (1) and with the corresponding position of said convex closure (12), and be installed with adjustment piece (5) in the said counterbore (1a), the end face of said adjustment piece (5) exceeds the end face of counterbore (1a).
13. stamping die according to claim 12 is characterized in that, the upper surface of said adjustment piece (5) is than the high 0.1~0.3mm in upper surface of counterbore (1a).
CN201010578801.8A 2010-12-03 2010-12-03 Stamping mould for forming work piece with local inner concave part Active CN102485371B (en)

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Application Number Priority Date Filing Date Title
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CN102485371B CN102485371B (en) 2014-09-17

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108817230A (en) * 2018-07-19 2018-11-16 安徽江淮汽车集团股份有限公司 A kind of mould structure

Citations (7)

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Publication number Priority date Publication date Assignee Title
JPH1076322A (en) * 1996-09-04 1998-03-24 Mitsubishi Heavy Ind Ltd Die for pressing work
KR20050034500A (en) * 2003-10-09 2005-04-14 주식회사 동양슬라이드 Plastic working apparatus for bending and forming
US20050103088A1 (en) * 2003-11-13 2005-05-19 Kubota Iron Works Co., Ltd. Lower die assembly in pressing machine
CN101104184A (en) * 2007-08-16 2008-01-16 浙江科技学院 Drawing die based on variable blank holderforce control
CN201091897Y (en) * 2007-07-10 2008-07-30 亿和精密金属制品(深圳)有限公司 One-shot forming device for deep-drawing structure
CN201455116U (en) * 2009-06-30 2010-05-12 重庆电子工程职业学院 Deep-drawing shaping die
CN201516476U (en) * 2009-10-19 2010-06-30 天津市津兆机电开发有限公司 Apparatus for eliminating stretch formability stamping piece edge curling

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1076322A (en) * 1996-09-04 1998-03-24 Mitsubishi Heavy Ind Ltd Die for pressing work
KR20050034500A (en) * 2003-10-09 2005-04-14 주식회사 동양슬라이드 Plastic working apparatus for bending and forming
US20050103088A1 (en) * 2003-11-13 2005-05-19 Kubota Iron Works Co., Ltd. Lower die assembly in pressing machine
CN201091897Y (en) * 2007-07-10 2008-07-30 亿和精密金属制品(深圳)有限公司 One-shot forming device for deep-drawing structure
CN101104184A (en) * 2007-08-16 2008-01-16 浙江科技学院 Drawing die based on variable blank holderforce control
CN201455116U (en) * 2009-06-30 2010-05-12 重庆电子工程职业学院 Deep-drawing shaping die
CN201516476U (en) * 2009-10-19 2010-06-30 天津市津兆机电开发有限公司 Apparatus for eliminating stretch formability stamping piece edge curling

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108817230A (en) * 2018-07-19 2018-11-16 安徽江淮汽车集团股份有限公司 A kind of mould structure

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