CN108672543A - A kind of the Electromagnetic Control building mortion and method of Spring-Back for Sheet Metal Bending - Google Patents
A kind of the Electromagnetic Control building mortion and method of Spring-Back for Sheet Metal Bending Download PDFInfo
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- CN108672543A CN108672543A CN201810403264.XA CN201810403264A CN108672543A CN 108672543 A CN108672543 A CN 108672543A CN 201810403264 A CN201810403264 A CN 201810403264A CN 108672543 A CN108672543 A CN 108672543A
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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
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/14—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces applying magnetic forces
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- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
A kind of Electromagnetic Control building mortion of Spring-Back for Sheet Metal Bending, blank holder including punch-pin, with the matching used cavity plate of punch-pin and for pushing down plate with the cooperation of cavity plate top end surface, it is characterized in that, the blank holder bottom end face and the setting of cavity plate top end surface are fluted, it is disposed with radial side push away line circle in a groove, there is radial side to push away driving plate between the outer edge and radial side push away line circle of plate, axial anti-push away line circle is disposed in the bottom of the cavity plate.The present invention can control Spring-Back for Sheet Metal Bending, be especially suitable for the bending springback control of the plate containing flange and multiple bending angles.
Description
Technical field
The invention belongs to materials plastic forming technical field, more particularly to the Electromagnetic Control of a kind of Spring-Back for Sheet Metal Bending shapes
Device and method.
Background technology
In sheet metal component bending and forming processing technology, the bending springback of plate is most common defect, seriously affects forming
The dimensional accuracy and form accuracy of part.Mainly used in conventional bending forming process trial-and-error method and excessively curved method carry out industrial analysis and
Mold design needs repeatedly to debug and repair a die, to meet the requirement of bending forming precision.Therefore the production efficiency of product is caused
It is low, of high cost, the production cycle is long, cause the huge waste of time and resource.
Electromagnetic pulse forming is a kind of method carrying out High-speed machining to metal works using pulse magnet field force.Study table
It is bright：Material generates under high speed impact and a kind of dynamic behaviour occurs different from the quasi-static deformational behavior of traditional diamond-making technique,
I.e. material elastomeric deformable wave, plastic wave impact under there are the dynamic behaviors such as twin crystal, tissue inter-variable, Adiabatic Shear.
The forming limit of difficult-to-deformation material can thus be effectively improved, reduce rebound.
In terms of using pulse-electromagnetic force control rebound, electromagnetism auxiliary stamping technology obtains the attention of domestic and foreign scholars.
In document " Electromagnetically Assisted Sheet Metal Stamping ", GS Daehn etc. are using insertion
The punch-pin of coil first carries out v-shaped bending to plate, and then coil discharge, makes the sheet metal bending angle of coil face in electromagnetic force
Under deform.In document " Reduction of springback in V-shapedparts using
In electromagnetic impulse calibration ", Cui Xiaohui etc. is had found using finite element and laboratory facilities, is used
The punch-pin of embedded coil first carries out v-shaped bending to plate, and then after coil discharge, the bending angle of plate can be under electromagnetic force
High-speed motion and high frequency oscillation occurs, to make the bending angle of plate after coil discharge that forward and reverse bending occur back and forth, most
The residual stress of whole bending angle reduces, and rebound reduces.In document " U-shaped part magnetic field impulse auxiliary bend springback control and deformation analysis "
In, Liu great Hai etc. in U-shaped punch-pin by arranging discharge coil.It first passes through punching block and prebuckling deformation is carried out to part, then pass through
Coil discharge reduces or even eliminates rebound.But above-mentioned method for controlling springback has the following disadvantages：Coil setting is justified in punch-pin
Angular zone can increase the manufacture difficulty of punch-pin and make precision, and greatly reduce the service life of punch-pin.Although this is also electromagnetism
The reason of shaping and can significantly reduce rebound, but still can not industrially being applied.
In patent " a kind of sheet bending device and method ", the propositions such as Cui Xiaohui first pass through rigid punch-pin to plate
Punching press certain distance simultaneously remains stationary as, then the coil by being arranged in below plate or the loop construction with collection chinaware justify plate
Angular zone discharges.To generate a big compression in plate fillet, the effect of conventional correction bending is played, is finally controlled back
Bullet.But bending with sizing needs excessive electromagnetic force.Simultaneously unanimously with traditional electro-magnetic forming control rebound, the bending corresponding to
Flange position is all not present in part, i.e. bending process is often the free bend without flanging.But free bend precision is poor, and
Bool on the industrial products such as automobile and aircraft often all carries multiple bending angles and flange arrangement.
Invention content
In order to overcome the disadvantages of the above prior art, the purpose of the present invention is to provide a kind of electromagnetism of Spring-Back for Sheet Metal Bending
Building mortion and method are controlled, Spring-Back for Sheet Metal Bending is can control, is especially suitable for the curved of the plate containing flange and multiple bending angles
Bent springback control.
To achieve the goals above, the technical solution adopted by the present invention is：
A kind of Electromagnetic Control building mortion of Spring-Back for Sheet Metal Bending, including punch-pin 1, with 1 matching used cavity plate 2 of punch-pin and
For pushing down the blank holder 3 of plate 4 with the cooperation of 2 top end surface of cavity plate, which is characterized in that 3 bottom end face of the blank holder and recessed
The setting of 2 top end surface of mould is fluted, is disposed with radial side push away line circle 6, outer edge and the radial side push away line circle of plate 4 in a groove
There is radial side to push away driving plate between 6, axial anti-push away line circle 5 is disposed in the bottom of the cavity plate 2.
The punch-pin 1 is V-arrangement or U-shaped structure, and when being v-shaped structure, bottom is straight, to ensure that plate 4 is pressed
After bending, there are a gaps with the bending angle of plate 4 for the bottom of punch-pin 1, so that after axial anti-push away line circle 5 discharges, plate
The bending angle of material 4 being capable of back-flexing；For U-shaped structure when, bottom is indent, after ensureing that plate 4 is bent, plate 4
Bottom be straight, and after axial anti-push away line circle 5 discharges, the bottom plane of plate 4 is by recurvation.
The plate 4 is high conductivity material, directly drives its bottom that recurvation occurs using the axial anti-electric discharge of push away line circle 5；
Alternatively, the plate 4 is material of low conductivity, the axial of high conductivity, which is arranged, on the top of axial anti-push away line circle 5 pushes driving
Plate 7, the axial anti-electric discharge of push away line circle 5 driving axial pushes driving plate 7 to move upwards, and recurvation occurs for the bottom for colliding plate 4.
The cavity plate 2 is rectangle or similar rectangle with plate 4, and blank holder 3 pushes down plate 4 in left and right ends, accordingly
Ground, the radial side pushes away driving plate and is divided into left radial push driving plate 8 and right radial push driving plate 9, respectively from the right and left
Plate 4 is pushed into cavity plate 2.
The plate 4 carries flange, and the blank holder 3 pushes down flange.
The radial side push away line circle 6 and axial anti-push away line circle 5 are all made of high conductivity material processing and fabricating and form；The diameter
It is fixed to side push away line circle 6 and axial anti-push away line circle 5 by using coil mounting plate made of insulating materials processing and fabricating, it is described
Blank holder 3 is carried using blank holder lantern ring made of insulating materials processing and fabricating, and the cavity plate 2 is carried to be processed using insulating materials
The cavity plate lantern ring being made.
The radial side push away line circle 6 and axial anti-push away line circle 5 are discharged respectively using two sets of discharge systems, control plate respectively
The rebound of the 4 flange bending angle of bending angle and plate of 4 bottoms, alternatively, the radial side push away line circle 6 and axial anti-push away line circle 5
It is discharged simultaneously using a set of discharge system, while controlling the rebound of the 4 flange bending angle of bending angle and plate of 4 bottom of plate,
To improve efficiency.
The radial side push away line circle 6 is strip coil or spiral winding, when for strip coil, including is located at plate
The left strip coil 61 and right strip coil 62 of 4 left and right sides, the length direction of left strip coil 61 and right strip coil 62 with
The left and right directions of plate 4 is vertical, and left strip coil 61 and right strip coil 62 are one or evenly distributed a plurality of；When for
When spiral winding, the left and right sides is close to 4 edge of plate, edge of the upper and lower both sides far from plate 4；
The anti-push away line circle 5 of axial direction is strip coil or spiral winding, when for strip coil, length direction and plate 4
Left and right directions it is vertical, be one or evenly distributed a plurality of.
The present invention also provides a kind of sheet metal bendings of the Electromagnetic Control building mortion using the Spring-Back for Sheet Metal Bending to return
The Electromagnetic Control manufacturing process of bullet, its step are as follows：
S1, plate 4 to be formed is placed on cavity plate 2, plate 4 is clamped in cavity plate 2 and blank holder 3 with blank holder 3
Between；
S2, punch-pin 1 pushes and crooked sheet material 4, until bottom that plate 4 is bent is close to axial anti-push away line circle 5 or close
Axial on axial anti-push away line circle 5 pushes driving plate 7, at this time the end edge of plate 4 along with radial side push away line circle 6 apart from increase；
S3, placement radial side pushes away driving plate between 4 end edge edge of plate and radial side push away line circle 6；
S4, axial anti-push away line circle 5 discharge, and 4 bottom of plate moves upwards and occurs recurvation and high frequency oscillation, makes 4 bottom of plate
The residual stress of portion's fillet reduces, and the rebound of 4 bottom roundings of plate is controlled；
S5, radial side push away line circle 6 discharge, and radial side pushes away driving plate and pushes center movement of the plate 4 to cavity plate 2, and causes
Corresponding 4 fillet of plate of 2 fillet of cavity plate is heaved, and the higher-order of oscillation occurs, and final residual stress is lowered, 4 edge of plate
The rebound of region fillet is controlled.
Compared with prior art, the beneficial effects of the invention are as follows：
(1) it uses electromagnetic force to carry out bending forming to plate, electro-magnetic forming can be utilized to reduce the advantage of plate material to rebound；Together
When electro-magnetic forming high-speed deformation characteristics, the forming limit of material can be improved；And after used punch-pin crooked sheet material, plate
As soon as the bottom surface of material and punch-pin has a gap, need to only it use smaller discharge energy that can make plate bottom that recurvation occur
And high frequency oscillation can reduce cost of equipment to eliminate stress；
(2) present invention both may adapt to the springback control of high conductivity material (aluminium, copper etc.), be readily applicable to low electricity
The springback control of conductivity material (high-strength steel, titanium alloy etc.)；
(3) traditional electro-magnetic forming springback control, needs coil to be all disposed within punch-nose angle or die entrance, to promote to justify
Material corresponding to angle bends and generates high frequency oscillation effect, but this can greatly increase Mold Making cost, precision and make
Use the service life.The method of the present invention equally may be implemented back on the basis of not influencing Mold Making cost, precision and service life
Bullet controls.Industrial applications for the following springback control lay the foundation.
(4) present invention both can be adapted for free bend, be readily applicable to flanged (FLGD) bending.To containing more bendings
The part springback control at angle still adapts to.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is the present invention
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is plate v-shaped bending springback control structural schematic diagram.
Fig. 2 is plate U-shaped bending springback control structure schematic diagram.
Fig. 3 is the vertical view of Fig. 1 or Fig. 2.
Fig. 4 is a kind of structural schematic diagram of radial side push away line circle.
Fig. 5 is another structural schematic diagram of radial side push away line circle.
Fig. 6 is a kind of structural schematic diagram of axial anti-push away line circle.
Fig. 7 is another structural schematic diagram of axial side push away line circle.
Fig. 8 is the flow diagram of the plate v-shaped bending method for controlling springback of high conductivity material.
Fig. 9 is the flow diagram of the plate v-shaped bending method for controlling springback of material of low conductivity.
Figure 10 is the flow diagram of the plate U-shaped bending springback control method of high conductivity material.
Figure 11 is the flow diagram of the plate U-shaped bending springback control method of material of low conductivity.
Marginal data：
1, punch-pin；2, cavity plate；3, blank holder；4, plate；5, axial anti-push away line circle；6, radial side push away line circle；7, axial to push away
Dynamic driving plate；8, left radial push driving plate；9, right radial push driving plate.
Specific implementation mode
The embodiment that the present invention will be described in detail with reference to the accompanying drawings and examples.
As depicted in figs. 1 and 2, the Electromagnetic Control building mortion of a kind of Spring-Back for Sheet Metal Bending, including punch-pin 1, match with punch-pin 1
Cover the cavity plate 2 used and the blank holder 3 for pushing down plate 4 with the cooperation of 2 top end surface of cavity plate.3 bottom end face of blank holder and recessed
The setting of 2 top end surface of mould is fluted, is disposed with radial side push away line circle 6, outer edge and the radial side push away line circle of plate 4 in a groove
There is radial side to push away driving plate between 6, axial anti-push away line circle 5 is disposed in the bottom of cavity plate 2.
As a kind of feasible configurations, with reference to figure 3, in of the invention, cavity plate 2 is rectangle or similar rectangle, pressure with plate 4
Flange 3 pushes down plate 4 in left and right ends, and correspondingly, radial side pushes away that driving plate is divided into left radial push driving plate 8 and right radial direction pushes away
Dynamic driving plate 9, pushes plate 4 from the right and left into cavity plate 2 respectively.Plate 4 can carry flange, utilize blank holder 3 to press at this time
Firmly flange.
Wherein, plate 4 can be high conductivity material, directly drive its bottom to occur using the axial anti-electric discharge of push away line circle 5
Recurvation；Alternatively, plate 4 can also be material of low conductivity, the axial direction that high conductivity is arranged on the top of axial anti-push away line circle 5 pushes away
Dynamic driving plate 7, the axial anti-electric discharge of push away line circle 5 driving axial pushes driving plate 7 to move upwards, and the bottom for colliding plate 4 occurs
Recurvation.
Radial side push away line circle 6 and axial anti-push away line circle 5 are all made of high conductivity material processing and fabricating and form, such as metal
Copper, aluminium etc., such current loss are few；Radial side push away line circle 6 and axial anti-push away line circle 5 are by using insulating materials processing and fabricating
Made of coil mounting plate fix, blank holder 3, which carries, utilizes blank holder lantern ring made of insulating materials processing and fabricating, 2 band of cavity plate
Have using cavity plate lantern ring made of insulating materials processing and fabricating, insulating materials can be epoxy plate, nylon etc., to avoid coil and
Spark phenomenon occurs for conductive material contacts.
Radial side push away line circle 6 and axial anti-push away line circle 5 can be used two sets of discharge systems and discharge respectively, control plate 4 respectively
The rebound of the 4 flange bending angle of bending angle and plate of bottom, alternatively, radial side push away line circle 6 and axial anti-push away line circle 5 can also be adopted
It is discharged simultaneously with a set of discharge system, while controlling the rebound of the 4 flange bending angle of bending angle and plate of 4 bottom of plate, with
Improve efficiency.
With reference to figure 4 and Fig. 5, radial side push away line circle 6 is strip coil or spiral winding, when for strip coil, including point
Not Wei Yu the left and right sides of plate 4 left strip coil 61 and right strip coil 62, left strip coil 61 and right strip coil 62
Length direction is vertical with the left and right directions of plate 4, and left strip coil 61 and right strip coil 62 are one or evenly distributed
It is a plurality of；It when for spiral winding, is totally rectangle, the left and right sides (short side) close to 4 edge of plate, upper and lower both sides are (long
Avris) edge far from plate 4.
With reference to figure 6 and Fig. 7, axial anti-push away line circle 5 is strip coil or spiral winding, when for strip coil, length side
It it is one or evenly distributed a plurality of to vertical with the left and right directions of plate 4.When for spiral winding, totally it is rectangle,
The left and right sides (long side) is vertical with the left and right directions of plate 4, only uses left part and axially counter push away can be realized.
With reference to figure 1, punch-pin 1 can be v-shaped structure, at this point, its bottom is straight, it is convex after ensureing that plate 4 is bent song
There are a gaps with the bending angle of plate 4 for the bottom of mould 1, so that after axial anti-push away line circle 5 discharges, the bending of plate 4
It angle being capable of back-flexing；
With reference to figure 2, punch-pin 1 can U-shaped structure, at this point, its bottom is indent, after ensureing that plate 4 is bent, plate 4
Bottom be straight, and after axial anti-push away line circle 5 discharges, the bottom plane of plate 4 is by recurvation.
In the present invention, after plate 4 is bent by punch-pin 1, flange material can be flowed into the hole of cavity plate 2, to make plate
The end edge of material 4 increases along at a distance from radial side push away line circle 6.After the increase of distance causes radial side push away line circle 6 to discharge, effect
Electromagnetic force in 4 end edge edge of plate is small, influences forming efficiency.Therefore it is bent by punch-pin 1 in plate 4, in end edge edge and diameter
Driving plate is pushed away to the radial side that high conductivity is arranged between side push away line circle 6.Radial side push away line circle 6 drives radial side to push away driving plate,
And plate flange material is driven to flow, cause the corresponding plate fillet of the fillet of cavity plate 2 further to bend.
The present invention also provides the Electromagnetic Control manufacturing process using above-mentioned apparatus, according to different materials of plate 4 and convex
The different shape of mould 1, specific embodiment are as follows：
Embodiment 1
Plate 4 is high conductivity material, and punch-pin 1 is V-arrangement.
With reference to figure 8, process is as follows：
S1, plate 4 to be formed is placed on cavity plate 2, plate 4 is clamped in cavity plate 2 and blank holder 3 with blank holder 3
Between；
S2, punch-pin 1 pushes and crooked sheet material 4, until bottom that plate 4 is bent is close to axial anti-push away line circle 5, plate at this time
The end edge edge of material 4 is with radial side push away line circle 6 apart from increase；
S3, left radial push driving plate 8 and right diameter are placed respectively between 4 end edge edge of plate and radial side push away line circle 6
To promotion driving plate 9；
S4, axial anti-push away line circle 5 discharge, and 4 bottom of plate moves upwards and occurs recurvation and high frequency oscillation, makes 4 bottom of plate
The residual stress of portion's fillet reduces, and the rebound of 4 bottom roundings of plate is controlled；
S5, radial side push away line circle 6 discharge, left radial push driving plate 8 and right radial push driving plate 9 push plate 4 to
The center movement of cavity plate 2, and corresponding 4 fillet of plate of 2 fillet of cavity plate is caused to be heaved, and the higher-order of oscillation occurs, it is final residual
Residue stress is lowered, and the rebound of 4 border area fillet of plate is controlled.
Embodiment 2
Plate 4 is material of low conductivity, and punch-pin 1 is V-arrangement.
With reference to figure 9, process is as follows：
S1, plate 4 to be formed is placed on cavity plate 2, plate 4 is clamped in cavity plate 2 and blank holder 3 with blank holder 3
Between；
S2, punch-pin 1 pushes and crooked sheet material 4, the axis on the close axially anti-push away line circle 5 in bottom that plate 4 is bent
To push driving plate 7, at this time plate 4 end edge along with radial side push away line circle 6 apart from increase；
S3, left radial push driving plate 8 is placed between 4 end edge edge of plate and radial side push away line circle 6 and right radial direction pushes away
Dynamic driving plate 9；
S4, axial anti-push away line circle 5 discharge, and 4 bottom of plate moves upwards and occurs recurvation and high frequency oscillation, makes 4 bottom of plate
The residual stress of portion's fillet reduces, and the rebound of 4 bottom roundings of plate is controlled；
S5, radial side push away line circle 6 discharge, left radial push driving plate 8 and right radial push driving plate 9 push plate 4 to
The center movement of cavity plate 2, and corresponding 4 fillet of plate of 2 fillet of cavity plate is caused to be heaved, and the higher-order of oscillation occurs, it is final residual
Residue stress is lowered, and the rebound of 4 border area fillet of plate is controlled.
Embodiment 3
Plate 4 is high conductivity material, and punch-pin 1 is U-shaped.
With reference to figure 10, process is consistent with embodiment 1.
Embodiment 4
Plate 4 is material of low conductivity, and punch-pin 1 is U-shaped.
With reference to figure 11, process is consistent with embodiment 2.
The thinking of the present invention is readily applicable to plate free bend process, and listed by the present invention is only v-shaped bending
With U-shaped warp architecture, more complicated structure is not listed, but if be the present invention program simple superposition still protecting
Within the scope of.
Claims (10)
1. a kind of Electromagnetic Control building mortion of Spring-Back for Sheet Metal Bending, including punch-pin (1) and punch-pin (1) matching used cavity plate
(2) and for coordinating the blank holder (3) for pushing down plate (4) with cavity plate (2) top end surface, which is characterized in that the blank holder (3)
Bottom end face and the setting of cavity plate (2) top end surface are fluted, are disposed with radial side push away line circle (6) in a groove, plate (4) it is outer
There is radial side to push away driving plate between edge and radial side push away line circle (6), axial anti-push away line is disposed in the bottom of the cavity plate (2)
It encloses (5).
2. the Electromagnetic Control building mortion of Spring-Back for Sheet Metal Bending according to claim 1, which is characterized in that the punch-pin (1)
For V-arrangement or U-shaped structure.
3. the Electromagnetic Control building mortion of Spring-Back for Sheet Metal Bending according to claim 2, which is characterized in that the punch-pin (1)
For v-shaped structure when, bottom is straight, and after ensureing that plate (4) is bent song, the bottom of punch-pin (1) is curved with plate (4)
There are a gaps at bent angle, so that after axial anti-push away line circle (5) electric discharge, the bending angle of plate (4) being capable of back-flexing；Institute
State punch-pin (1) be U-shaped structure when, bottom is indent, and after ensureing that plate (4) is bent, the bottom of plate (4) is straight
, and after axial anti-push away line circle (5) electric discharge, the bottom plane of plate (4) is by recurvation.
4. the Electromagnetic Control building mortion of Spring-Back for Sheet Metal Bending according to claim 1, which is characterized in that the plate (4)
It is high conductivity material, directly drives its bottom that recurvation occurs using axial anti-push away line circle (5) electric discharge；Alternatively, the plate (4)
It is material of low conductivity, the axial promotion driving plate (7) of high conductivity is set on the top of axial anti-push away line circle (5), it is axial anti-
Push away line circle (5) electric discharge driving axial pushes driving plate (7) to move upwards, and recurvation occurs for the bottom for colliding plate (4).
5. the Electromagnetic Control building mortion of Spring-Back for Sheet Metal Bending according to claim 1, which is characterized in that the cavity plate (2)
It is rectangle or similar rectangle with plate (4), blank holder (3) pushes down plate (4), correspondingly, the radial direction in left and right ends
Side pushes away driving plate and is divided into left radial push driving plate (8) and right radial push driving plate (9), respectively from the right and left to cavity plate
(2) plate (4) is pushed in.
6. the Electromagnetic Control building mortion of Spring-Back for Sheet Metal Bending according to claim 1, which is characterized in that the plate (4)
With flange, the blank holder (3) pushes down flange.
7. the Electromagnetic Control building mortion of Spring-Back for Sheet Metal Bending according to claim 1, which is characterized in that the radial side pushes away
Coil (6) and axial anti-push away line circle (5) are all made of high conductivity material processing and fabricating and form；The radial side push away line circle (6) and
Axial anti-push away line circle (5) is fixed by using coil mounting plate made of insulating materials processing and fabricating, blank holder (3) band
Have using blank holder lantern ring made of insulating materials processing and fabricating, the cavity plate (2) carry using insulating materials processing and fabricating and
At cavity plate lantern ring.
8. the Electromagnetic Control building mortion of Spring-Back for Sheet Metal Bending according to claim 1, which is characterized in that the radial side pushes away
Coil (6) and axial anti-push away line circle (5) are discharged respectively using two sets of discharge systems, control the bending angle of plate (4) bottom respectively
With the rebound of plate (4) flange bending angle, alternatively, the radial side push away line circle (6) and axial anti-push away line circle (5) are using a set of
Discharge system discharges simultaneously, while controlling the rebound of the bending angle and plate (4) flange bending angle of plate (4) bottom, to carry
High efficiency.
9. the Electromagnetic Control building mortion of Spring-Back for Sheet Metal Bending according to claim 1, which is characterized in that
The radial side push away line circle (6) is strip coil or spiral winding, when for strip coil, including is located at plate
(4) the left strip coil (61) at left and right sides of and right strip coil (62), left strip coil (61) and right strip coil (62)
Length direction is vertical with the left and right directions of plate (4), and left strip coil (61) and right strip coil (62) are one or
Even arrangement it is a plurality of；When for spiral winding, the left and right sides is close to plate (4) edge, side of the upper and lower both sides far from plate (4)
Edge；
The anti-push away line circle (5) of axial direction is strip coil or spiral winding, when for strip coil, length direction and plate (4)
Left and right directions it is vertical, be one or evenly distributed a plurality of.
10. a kind of electricity of the Spring-Back for Sheet Metal Bending of Electromagnetic Control building mortion using Spring-Back for Sheet Metal Bending described in claim 1
Magnetic control manufacturing process, its step are as follows：
S1, plate (4) to be formed is placed on cavity plate (2), plate (4) is clamped in cavity plate (2) and pressure with blank holder (3)
Between flange (3)；
S2, punch-pin (1) pushes and crooked sheet material (4), until the close axial anti-push away line circle (5) in bottom that plate (4) is bent, or
Axial direction on axial anti-push away line circle (5) pushes driving plate (7), at this time the end edge edge of plate (4) and radial side push away line circle
(6) distance increases；
S3, placement radial side pushes away driving plate between plate (4) end edge edge and radial side push away line circle (6)；
S4, axial anti-push away line circle (5) electric discharge, plate (4) bottom moves upwards and occurs recurvation and high frequency oscillation, makes plate (4)
The residual stress of bottom roundings reduces, and the rebound of plate (4) bottom roundings is controlled；
S5, radial side push away line circle (6) electric discharge, radial side pushes away driving plate and pushes center movement of the plate (4) to cavity plate (2), and leads
It causes corresponding plate (4) fillet of cavity plate (2) fillet to heave, and the higher-order of oscillation occurs, final residual stress is lowered, plate
(4) rebound of border area fillet is controlled.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810403264.XA CN108672543B (en) | 2018-04-28 | 2018-04-28 | A kind of the Electromagnetic Control forming device and method of Spring-Back for Sheet Metal Bending |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810403264.XA CN108672543B (en) | 2018-04-28 | 2018-04-28 | A kind of the Electromagnetic Control forming device and method of Spring-Back for Sheet Metal Bending |
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| Publication Number | Publication Date |
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| CN108672543A true CN108672543A (en) | 2018-10-19 |
| CN108672543B CN108672543B (en) | 2019-11-05 |
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| CN109834152A (en) * | 2019-03-13 | 2019-06-04 | 中南大学 | A kind of anti-inflation drawing forming method of plate electromagnetic force and forming device |
| CN110014067A (en) * | 2019-05-09 | 2019-07-16 | 中南大学 | A kind of electromagnetic forming device and manufacturing process of equal pressure coil type |
| CN110523834A (en) * | 2019-04-18 | 2019-12-03 | 中南大学 | A kind of plate electromagnetism auxiliary bending forming method for controlling springback and device |
| CN111167920A (en) * | 2019-12-26 | 2020-05-19 | 中南大学 | Electromagnetic-multipoint composite forming device for plate and forming method thereof |
| CN116833293A (en) * | 2023-04-20 | 2023-10-03 | 吉林大学 | Closed loop stretch forming method of flexible stretch forming machine of electromagnetic clamp |
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| CN110523834A (en) * | 2019-04-18 | 2019-12-03 | 中南大学 | A kind of plate electromagnetism auxiliary bending forming method for controlling springback and device |
| CN110014067A (en) * | 2019-05-09 | 2019-07-16 | 中南大学 | A kind of electromagnetic forming device and manufacturing process of equal pressure coil type |
| CN110014067B (en) * | 2019-05-09 | 2021-04-20 | 中南大学 | Uniform-pressure coil type electromagnetic forming device and forming method |
| CN111167920A (en) * | 2019-12-26 | 2020-05-19 | 中南大学 | Electromagnetic-multipoint composite forming device for plate and forming method thereof |
| CN116833293A (en) * | 2023-04-20 | 2023-10-03 | 吉林大学 | Closed loop stretch forming method of flexible stretch forming machine of electromagnetic clamp |
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