CN207266988U - A kind of electromagnetic forming device of metal sheet - Google Patents
A kind of electromagnetic forming device of metal sheet Download PDFInfo
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- CN207266988U CN207266988U CN201721331855.8U CN201721331855U CN207266988U CN 207266988 U CN207266988 U CN 207266988U CN 201721331855 U CN201721331855 U CN 201721331855U CN 207266988 U CN207266988 U CN 207266988U
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Abstract
The utility model discloses a kind of electromagnetic forming device of metal sheet, including：Coaxial multiple form-wound coils and mould；Coaxial multiple form-wound coils are placed on the top of metal sheet, for when it is passed through pulse current, so that producing inductive loop in metal sheet, the magnetic field that pulse current produces produces electromagnetic force with inductive loop effect, so that metal sheet is deformed into die forming under the driving of electromagnetic force；And the metal works for being shaped when metal sheet through electromagnetic force and mould be not when fitting closely, at least one form-wound coil is axially movable in multiple form-wound coils, move to above metal works, pulse current is passed through again in multiple form-wound coils so that metal works are deformed into mould under the driving of electromagnetic force and are tightly sticked to form with mould.The utility model can improve capacity usage ratio, the structural strength of coil and the controllability of electromagnetic force field distribution in discharge process.
Description
Technical field
The utility model belongs to metal forming manufacturing field, is filled more particularly, to a kind of electro-magnetic forming of metal sheet
Put.
Background technology
During sheet metal electro-magnetic forming, the structural strength of coil is the guarantee of electro-magnetic forming ability, electromagnetic force field
Distribution be to determine the key factor of the final deformable contour of plate, the coil of high intensity can provide sufficiently large electromagnetic force, rationally
The electromagnetic force field of distribution can effectively improve the deformational behavior of plate, plate is fully become on the premise of failure damage does not occur
Shape is simultaneously bonded with mould.
Traditional plate electro-magnetic forming, uses single form-wound coil electro-magnetic forming system, unicoil electro-magnetic forming system
Have the following problems：
1st, the distribution of electromagnetic force field depends entirely on the structure of coil, flexible poor.
2nd, efficient plate coil structural strength is low, it is difficult to the electromagnetic force itself produced during electro-magnetic forming is born,
Magnet is caused to destroy.
When the 3rd, shaping big plate, the number of turn of corresponding coil increases, the increase of coiling radius, inductance increase, and the inductance of coil increases
Conference guiding discharge frequency reduces, skin depth increase, for the less plate of thickness, when skin depth is more than thickness of slab, shaping
During magnetic field can penetrate plate, cause energy loss, reduce the capacity usage ratio in forming process, reduce further electricity
The crystallized ability of magnetic forming system.
, it is necessary to shape twice or repeatedly, for unicoil when the 4, shaping the plate that electrical conductivity is low, intensity is high or diameter is big
Speech：1) in order to improve the effect of shaping for the first time, the diameter of coil and the caliber size sizableness of mould are designed, but at this
In the case of kind, since the size of coil limits, it is difficult to for the first time after (preceding once) shaping according to the deformation adjustment coil of plate
Position, makes it be approached as far as possible with plate to improve the effect of second or multiple discharge.2) consider that plate needs repeatedly
Shaping, designs the outside diameter of reduction coil appropriate during form-wound coil, can be according to once deformed before plate (first time)
The position of shape adjustment coil, makes it as far as possible with plate close to improve the effect of second or multiple discharge, but this
In the case of kind, the diminution of form-wound coil size have impact on the force distribution in plate, it is difficult to ensure the matter of plate shaping for the first time
Amount.
Utility model content
The purpose of this utility model is to provide a kind of electromagnetic forming device of metal sheet, it is intended to it is single to solve existing tradition
The distribution of electromagnetic force is uncontrollable in coil electromagnetism shaping, and the structural strength of form-wound coil is low, and forming efficiency is low and multiple shaping
Ropy technical problem.
To achieve the above object, the utility model provides a kind of electromagnetic forming device of metal sheet, including：Coaxial is more
A form-wound coil and mould；
The mould is used to carry metal sheet to be formed, and constrains the shaping form when metal sheet deforms；
Coaxial multiple form-wound coils are placed on the top of the metal sheet, for when it is passed through pulse current so that institute
To state and inductive loop is produced in metal sheet, the magnetic field that the pulse current produces produces electromagnetic force with inductive loop effect,
So that the metal sheet is deformed into die forming under the driving of electromagnetic force；Coaxial multiple form-wound coils are used to work as institute
When stating the metal works that metal sheet shapes through electromagnetic force and not fitted closely with mould, in the multiple form-wound coil at least
There is a form-wound coil axially movable, move to above the metal works, be passed through again in the multiple form-wound coil
Pulse current so that the metal works are deformed into mould under the driving of electromagnetic force and are tightly sticked to form with mould.
Alternatively, the diameter of form-wound coil increases successively in coaxial multiple form-wound coils, the multiple shaped wire
Circle forms nested structure, and each form-wound coil can move axially so.
Alternatively, its direction is parallel with metal sheet when the magnetic field that the pulse current produces reaches metal sheet, described
The direction of inductive loop is opposite with the direction of the pulse current.
Alternatively, in coaxial multiple form-wound coils the structural parameters of each form-wound coil according to metallic plate to be formed
The material properties and dimensional parameters of part determine.
Alternatively, be passed through in multiple form-wound coils in each form-wound coil pulse current size and the time according to actual need
Determine；Size and the time of pulse current are passed through in each form-wound coil by controlling, to control the magnetic that pulse current produces
The electromagnetic force field that field is produced with inductive loop effect is distributed.
Alternatively, form-wound coil is pulse magnet structure, in the case where ensuring insulation safety, when form-wound coil is placed on
During the top of the metal sheet, the gap between its lower face and metal sheet is the smaller the better；
In general, by the contemplated above technical scheme of the utility model compared with prior art, have with following
Beneficial effect：
1st, each coil of form-wound coil group has oneself independent power supply, an electro-magnetic forming process in the utility model
In, different form-wound coils can be carried out by connection in series-parallel according to shaping demand, the discharge energy of each power supply can also be adjusted
With electric discharge sequential so as to obtain rational electromagnetic force field distribution, make the distribution of electromagnetic force field become controllable.
2nd, each form-wound coil of form-wound coil group or by adjacent two or more coils in the utility model
The coil group of composition, can be according to shaping Demand Design into the coil or coil group being free to move axially, when plate needs repeatedly
During shaping, the position of each form-wound coil or coil group can be adjusted vertically according to the previous deflection of plate, made into
The distance of the lower face of shape coil and the upper surface of metal sheet is small as far as possible, suppresses the decay of electromagnetic force, improves shaping energy
Power, while the designing scheme of multiple coils has good mould adaptability, specially can be tentatively true according to the size of mould
The number of alignment circle group coil, resolves into several coaxial coils by a traditional coil, ensures first time forming effect
On the premise of not reducing, the flexibility of coil is improved, it is convenient to shape large-sized workpiece.
3rd, the outermost layer of each form-wound coil of form-wound coil group is added using high tensile strength fibrous material in the utility model
Gu improve the structural strength of coil.
4th, in the utility model each coil of form-wound coil group structural parameters, can be according to the category of moulding material
Property and dimensional parameters determine, consider influence of the kelvin effect to capacity usage ratio, close each coil inductance size after design
Reason, discharge frequency is moderate, lifts the efficiency of electro-magnetic forming.
Brief description of the drawings
Fig. 1 is the corresponding manufacturing process flow diagram of metal sheet electromagnetic forming device provided by the utility model；
Fig. 2 is the metal sheet electromagnetic forming device schematic diagram according to the utility model first embodiment；
Fig. 3 is the metal sheet electromagnetic forming device schematic diagram according to the utility model second embodiment；
Fig. 4 is the metal sheet electromagnetic forming device schematic diagram according to the 3rd embodiment of the utility model；
Fig. 5 is the metal sheet electromagnetic forming device schematic diagram according to the 4th embodiment of the utility model；
Fig. 6 is the metal sheet electromagnetic forming device schematic diagram according to the 5th embodiment of the utility model；
Fig. 7 a are electromagnetic force Density Distribution schematic diagram in different discharge energy lower plates during unicoil electro-magnetic forming；
Fig. 7 b are two coils electromagnetism in different discharge energies is than lower plate in coaxial dual coil electromagnetic forming process
Force density distribution schematic diagram；
Fig. 8 a are the current curve schematic diagram that two coils discharge at the same time in coaxial dual coil electromagnetic forming process；
Fig. 8 b first discharge 150 μ s discharge current schematic diagrames for coaxial dual coil electromagnetic forming process coil 1-1；
Fig. 8 c first discharge 150 μ s discharge current schematic diagrames for coaxial dual coil electromagnetic forming process coil 1-2；
In all of the figs, identical reference numeral is used for representing identical element or structure, wherein：1-1 is the first one-tenth
Shape coil, 1-2 are the second form-wound coil, 1-3 is the 3rd form-wound coil, 2-1 is plate blank, 2-2 is electric discharge shaping for the first time
Rear workpiece, 2-3 be workpiece after second of electric discharge shaping, 3 be mould, 4 be blank holder, 5-1 be that the first form-wound coil is reinforced
Layer, 5-2 are the second form-wound coil reinforcing layer, 5-3 is the 3rd form-wound coil reinforcing layer, 6-1 is the first power supply, 6-2 is the second electricity
Source and 6-3 are the 3rd power supply.
Embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, is further elaborated the utility model.It should be appreciated that specific embodiment described herein is only explaining this
Utility model, is not used to limit the utility model.It is in addition, involved in each embodiment of the utility model disclosed below
As long as and to technical characteristic do not form conflict each other and be mutually combined.
The utility model provides a kind of electromagnetic forming device of metal sheet, by the upper surface of metal sheet and mould
Form-wound coil group is placed in the corresponding position of cavity, and according to shaping demand, form-wound coil group is by two or more coaxial lines
Circle composition, different form-wound coils can carry out connection in series-parallel connection, and adjacent two or more form-wound coils can be done
Into an entirety, each independent form-wound coil or can by the entirety that two or more adjacent coil is made
With axial movement, each independent form-wound coil or the two or more form-wound coils connected in different ways are equal
Access independent power supply.
Wherein, coaxial multiple form-wound coils can be described as coaxial multi-pole coils again, and multistage refers to more set power supply coordinateds
Power for multiple form-wound coils.Correspondingly, the utility model can be described as the plate electro-magnetic forming dress based on coaxial multi-pole coils again
Put.Specifically, in coaxial multiple form-wound coils some form-wound coil can carry out it is in series or in parallel, can not also be into
Row connection in series-parallel.Form-wound coil after going here and there or being connected in parallel can share a set of power supply, the shaping do not gone here and there or be connected in parallel
Coil has independent power-supply system.Multiple multiple power supply coordinateds of form-wound coil can according to shaping demand by it is different into
Shape coil carries out connection in series-parallel, each form-wound coil or series-parallel form-wound coil group is had inductance and the electric discharge of fair-sized
Frequency, improves the electro-magnetic forming efficiency of metal sheet.
Further, during electro-magnetic forming, the discharge energy of every suit power supply can be with flexible modulation, different power supplys
At the same time or there is the electric discharge of certain sequential, pulse current is passed through in form-wound coil, inductive loop and then electricity is produced on metal sheet
Magnetic pressure, driving workpiece produce plastic deformation.For shaping the metal sheet blank that electrical conductivity is low, intensity is high, size is big, once
, it is necessary to adjust the position of form-wound coil vertically according to the deflection of plate after electric discharge, carry out twice or multiple discharge shapes.
The utility model is solved due to the low caused electromagnetic pressure deficiency of loop construction intensity in conventional forming process, single
Capacity usage ratio caused by form-wound coil inductance is excessive is low, and distribution of electromagnetic force is non-adjustable caused by the single structure of form-wound coil
The technical problem such as infeasible that control and coil position repeatedly shape caused by can not changing.
Fig. 1 is the corresponding manufacturing process flow diagram of metal sheet electromagnetic forming device provided by the utility model, such as
Shown in Fig. 1, including step S101- steps S104.
S101, places coaxial multiple form-wound coils above metal sheet to be formed.
S102, pulse current is passed through in multiple form-wound coils so that inductive loop is produced in the metal sheet, it is described
The magnetic field that pulse current produces produces electromagnetic force with inductive loop effect, and mould is directed toward in the direction of the electromagnetic force.
S103, metal sheet are deformed into die forming under the driving of electromagnetic force.
S104, it is the multiple when the metal works that metal sheet is shaped through electromagnetic force do not fit closely with mould
At least one form-wound coil axially movable, is moved to above the metal works, in the multiple shaping in form-wound coil
Pulse current is passed through in coil again so that the metal works are deformed into mould and close with mould under the driving of electromagnetic force
Fitting shaping.
It should be noted that metal works refer to the metal sheet of half form.That is metal sheet process is electric at least once
After magnetic forming, its forming effect also not up to ideal, it is necessary to again shape the metal works after half form again.
Alternatively, its direction is parallel with metal sheet when the magnetic field that the pulse current produces reaches metal sheet, described
The direction of inductive loop is opposite with the direction of the pulse current.
Alternatively, coaxial multiple form-wound coils are determined according to the material properties of metal sheet to be formed and dimensional parameters
In each form-wound coil structural parameters.
Alternatively, the size for determining to be passed through pulse current in multiple form-wound coils in each form-wound coil according to being actually needed
And the time；Size and the time of pulse current are passed through in each form-wound coil by controlling, to control the magnetic that pulse current produces
The electromagnetic force field that field is produced with inductive loop effect is distributed.
Alternatively, the diameter of form-wound coil increases successively in coaxial multiple form-wound coils, the multiple shaped wire cast
Into nested structure, each form-wound coil can move axially so.
Wherein, multiple form-wound coils are alternatively referred to as form-wound coil group.Mould can be concave die cavity.
Form-wound coil group is placed in the top of metal sheet corresponding with concave die cavity (mould)；In electro-magnetic forming process
In, pulse current is passed through in form-wound coil group, the inductive loop in metal sheet, and then in metallic plate corresponding with concave die cavity
Part position produces electromagnetic force, and driving metal sheet produces plastic deformation to cavity plate high-speed motion.
Preferably, form-wound coil group includes multiple coaxial form-wound coils, and wherein form-wound coil is pulse magnet structure, true
In the case of protecting insulation safety, the gap between its lower face and metal sheet is the smaller the better.
Preferably, in form-wound coil group, each form-wound coil has oneself independent end of incoming cables and leading-out terminal, each
Form-wound coil is reinforced in outermost layer using high tensile strength fibrous material.
Preferably, in form-wound coil group, each form-wound coil can be all designed to by axial direction according to shaping demand
The coil moved freely, can also form the entirety by adjacent two or more coil designs into an entirety
Single coil cannot move axially, and can integrally move axially,
Preferably, in form-wound coil group, different form-wound coils can be carried out by connection in series-parallel according to shaping demand, made each
A form-wound coil or series-parallel coil group have the inductance and discharge frequency of fair-sized, improve electro-magnetic forming efficiency.
Preferably, the coil after being gone here and there or be connected in parallel shares a set of power supply, the line do not gone here and there or be connected in parallel
Circle has independent power-supply system.
Preferably, discharge energy and the discharge time of every suit power supply can be adjusted according to shaping demand.It is each to adjust
The discharge energy of a power supply and electric discharge sequential are so as to obtaining rational electromagnetic force field distribution, and making the distribution of electromagnetic force field, become can
Control.
Preferably, form-wound coil is pulse magnet structure, in the case where ensuring insulation safety, when form-wound coil is placed on
During the top of the metal sheet, the gap between its lower face and metal sheet is the smaller the better；When form-wound coil is placed on gold
When above metal work-pieces, the gap between its lower face and metal sheet is the smaller the better.
The electromagnetic forming device of metal sheet provided by the utility model is described below in conjunction with specific embodiment.
First embodiment
Fig. 2 be metal sheet electromagnetic forming device provided by the utility model first embodiment, the electromagnetic forming device
Including the first form-wound coil 1-1, the second form-wound coil 1-2, plate blank (metal sheet to be formed) 2-1, mould 3, flanging
The 4, first power supply 6-1 and second source 6-2 is enclosed, wherein plate blank 2-1 can be aluminum alloy materials, the aluminium alloy material of the model
Expect that electrical conductivity is high, plasticity is good, intensity is low and is readily formed；The longitudinal section of shaping dies 3 is cartouche；First form-wound coil
1-1 and the second form-wound coil 1-2 is an entirety, and outermost layer is reinforced with high tensile strength fibrous material 5-1 and 5-2, axial
It is not movable.The corresponding manufacturing process of the electromagnetic forming device comprises the following steps：
(1) plate blank 2-1 is placed in the upper surface of mould 3, blank holder 4 is positioned on plate and is applied necessarily
The outside diameter alignment of pressure, the wherein outside diameter of blank holder 4, the outside diameter of plate blank 2-1 and mould 3.
(2) coaxial form-wound coil group is placed in above plate blank 2-1, wherein the position of form-wound coil group and mould 3
Cavity is corresponding, and the gap between the lower face of form-wound coil and plate blank 2-1 can be 2mm.
(3) first form-wound coil 1-1 and the second form-wound coil 1-2 are respectively connected to the electricity of the first independent power supply 6-1 and second
Source 6-2, during metal sheet blank 2-1 electro-magnetic formings, the first power supply 6-1 and second source 6-2 electric discharges, the first shaped wire
Circle 1-1 and the second form-wound coil 1-2 is passed through pulse current at the same time, the inductive loop on metal sheet blank 2-1, and then in metal
Electromagnetic pressure, the 2-1 deformations of driving metal sheet blank are produced on plate blank 2-1.
Since the aluminum alloy materials electrical conductivity of the model is high, intensity is low, the electromagnetic pressure for generation of once discharging can make plate
Part blank 2-1 is deformed into metal works 2-2 positions and is bonded with mould.
Second embodiment
Fig. 3 be metal sheet electromagnetic forming device provided by the utility model second embodiment, the electromagnetic forming device
Including the first form-wound coil 1-1, the second form-wound coil 1-2, plate blank 2-1, mould 3, blank holder 4, the first power supply 6-1 and
Two power supply 6-2, wherein plate blank 2-1 can be aluminum alloy materials, and the aluminum alloy materials electrical conductivity of the model is low, intensity is high,
It is difficult to shape.First form-wound coil 1-1 and the second form-wound coil 1-2 is two independent coils, and the first form-wound coil 1-1 can be with
Axially movable.The corresponding manufacturing process of the electromagnetic forming device comprises the following steps：
(1) plate blank 2-1 is placed in the upper surface of mould 3, blank holder 4 is positioned on plate and is applied necessarily
The outside diameter alignment of pressure, the wherein outside diameter of blank holder 4, the outside diameter of plate blank 2-1 and mould 3.
(2) coaxial form-wound coil group is placed in above plate blank 2-1, wherein the position of form-wound coil group and mould 3
Cavity is corresponding, and the gap between the lower face of form-wound coil and plate blank 2-1 is 2mm, specifically as in first embodiment
Shown in Fig. 2.
(3) first form-wound coil 1-1 and the second form-wound coil 1-2 are respectively connected to the electricity of the first independent power supply 6-1 and second
Source 6-2, during metal sheet blank 2-1 electro-magnetic formings, the first power supply 6-1 and second source 6-2 discharge at the same time, the first one-tenth
Shape coil 1-1 and the second form-wound coil 1-2 are passed through pulse current at the same time, the inductive loop on metal sheet blank 2-1, Jin Er
Electromagnetic pressure is produced on metal sheet blank 2-1, driving metal sheet blank 2-1 is deformed into metal works 2-2 positions.
(4) the first form-wound coil 1-1 is axially moveable, makes its lower face edge and deformed metal works 2- for the first time
2 just contact, but do not apply pressure.
(5) first power supply 6-1 discharge, and are passed through pulse current in the first form-wound coil 1-1, sense on metal works 2-2
It is vortexed and produces electromagnetic pressure, driving metal works 2-2 continues to deform.
Since the aluminum alloy materials electrical conductivity of the model is low, intensity is high, the electromagnetic pressure for generation of once discharging makes metallic plate
Part blank 2-1 is deformed into metal works 2-2 positions, as shown in figure 3, metal works 2-2 positions are not tight with mould 3
Closely connected conjunction, reduces its distance with metal works 2-2 by mobile first form-wound coil 1-1, discharges metal works 2-2 again
Being shaped to metal works 2-3 positions makes it be fitted closely with mould 3.
3rd embodiment
Fig. 4 be metal sheet electromagnetic forming device provided by the utility model 3rd embodiment, the electromagnetic forming device
Including the first form-wound coil 1-1, the second form-wound coil 1-2 and the 3rd form-wound coil 1-3, plate blank 2-1, mould 3, blank holder
4th, the first power supply 6-1 and second source 6-2, wherein plate blank 2-1 can be aluminum alloy materials, the aluminum alloy materials of the model
Electrical conductivity is high, and plasticity is good, and intensity is low, is readily formed；The longitudinal section of shaping dies 3 is cartouche；First form-wound coil 1-
1st, the second form-wound coil 1-2 and the 3rd form-wound coil 1-3 is an entirety, and outermost layer uses fibrous material 5-1,5- of high intensity
2 and 5-3 is reinforced, overall axial not movable.The corresponding manufacturing process of the electromagnetic forming device comprises the following steps：
(1) plate blank 2-1 is placed in the upper surface of mould 3, blank holder 4 is positioned on plate and is applied necessarily
The outside diameter alignment of pressure, the wherein outside diameter of blank holder 4, the outside diameter of plate blank 2-1 and mould 3.
(2) coaxial form-wound coil group is placed in above plate blank 2-1, wherein the position of form-wound coil group and mould 3
Cavity is corresponding, and the gap between the lower face of form-wound coil and plate blank 2-1 is 2mm.
(3) first form-wound coil 1-1 are in parallel with the second form-wound coil 1-2, and access the first power supply 6-1, the 3rd shaping
Coil 1-3 accesses second source 6-2, during metal sheet blank 2-1 electro-magnetic formings, the first power supply 6-1 and second source
6-2 discharges at the same time, and the first form-wound coil 1-1, the second form-wound coil 1-2 and the 3rd form-wound coil 1-3 are passed through pulse current at the same time,
The inductive loop on metal sheet blank 2-1, and then electromagnetic pressure is produced on metal sheet blank 2-1, drive metal sheet
Blank 2-1 is deformed.
Since the aluminum alloy materials electrical conductivity of the model is high, intensity is low, the electromagnetic pressure for generation of once discharging can make plate
Part blank 2-1 is deformed into metal works 2-2 positions and is bonded with mould 3.
Fourth embodiment
Fig. 5 be metal sheet electromagnetic forming device provided by the utility model fourth embodiment, the electromagnetic forming device
Including the first form-wound coil 1-1, the second form-wound coil 1-2, the 3rd form-wound coil 1-3, plate blank 2-1, mould 3, blank holder
4th, the first power supply 6-1, second source 6-2, wherein plate blank 2-1 can be aluminum alloy materials, the aluminum alloy materials of the model
Electrical conductivity is low, intensity is high, it is difficult to shapes.First form-wound coil 1-1 and the second form-wound coil 1-2 is an entirety, and parallel connection is even
Connect, the entirety of the first form-wound coil 1-1 and the second form-wound coil 1-2 compositions can axially movable, and the 3rd form-wound coil 1-3 is not
Can be axially movable.First form-wound coil 1-1, the second form-wound coil 1-2 and the 3rd form-wound coil 1-3 outermost layers are respectively with high-strength
Degree fibrous material 5-1,5-2 and 5-3 are reinforced.The corresponding manufacturing process of the electromagnetic forming device comprises the following steps：
(1) plate blank 2-1 is placed in the upper surface of mould 3, blank holder 4 is positioned on plate and is applied necessarily
The outside diameter alignment of pressure, the wherein outside diameter of blank holder 4, the outside diameter of plate blank 2-1 and mould 3.
(2) coaxial form-wound coil group is placed in above plate blank 2-1, wherein the position of form-wound coil group and mould 3
Cavity is corresponding, and the gap between the lower face of form-wound coil and plate blank 2-1 is 2mm, specifically as in 3rd embodiment
Shown in Fig. 4.
The first power supply 6-1, the 3rd form-wound coil are accessed after (3) first form-wound coil 1-1 and the second form-wound coil 1-2 parallel connections
Second source 6-2 is accessed, during metal sheet blank 2-1 electro-magnetic formings, the first power supply 6-1 and second source 6-2 are at the same time
Electric discharge, the first form-wound coil 1-1, the second form-wound coil 1-2 and the 3rd form-wound coil 1-3 are passed through pulse current at the same time, in metal
Inductive loop on plate blank 2-1, and then electromagnetic pressure is produced on metal sheet blank 2-1, driving metal sheet blank 2-1
It is deformed into metal works 2-2 positions.
(4) entirety of the first form-wound coil 1-1 and the second form-wound coil 1-2 compositions is axially moveable, makes its lower face side
Edge is just contacted with deformed metal works 2-2 for the first time, but does not apply pressure.
(5) first power supply 6-1 discharge, and pulse electricity is passed through at the same time in the first form-wound coil 1-1 and the second form-wound coil 1-2
Stream, inductive loop and electromagnetic pressure is produced on metal works 2-2, and driving metal works 2-2 continues to deform.
Since the aluminum alloy materials electrical conductivity of the model is low, intensity is high, the electromagnetic pressure for generation of once discharging makes plate base
Material 2-1 is deformed into workpiece 2-2, is not bonded with mould 3, passes through mobile first form-wound coil 1-1 and the second form-wound coil 1-2 groups
Into entirety, reduce its distance with workpiece 2-2, power supply 6-1 discharges again is shaped to metal works 2-3 by metal works 2-2
Position is fitted closely with mould.
5th embodiment
Fig. 6 be metal sheet electromagnetic forming device provided by the utility model the 5th embodiment, the electromagnetic forming device
Including the first form-wound coil 1-1, the second form-wound coil 1-2, the 3rd form-wound coil 1-3, plate blank 2-1, mould 3, blank holder
4th, the first power supply 6-1, second source 6-2 and the 3rd power supply 6-3, wherein plate blank 2-1 can be aluminum alloy materials, the model
Aluminum alloy materials electrical conductivity is low, intensity is high, it is difficult to shape.First form-wound coil 1-1, the second form-wound coil 1-2 and the three one-tenth
Shape coil 1-3 outermost layers are reinforced with high tensile strength fibrous material 5-1,5-2 and 5-3 respectively, and can be axially movable.Should
The corresponding manufacturing process of electromagnetic forming device comprises the following steps：
(1) plate blank 2-1 is placed in the upper surface of mould 3, blank holder 4 is positioned on plate and is applied necessarily
The outside diameter alignment of pressure, the wherein outside diameter of blank holder 4, the outside diameter of plate blank 2-1 and mould 3.
(2) coaxial form-wound coil group is placed in above plate blank 2-1, wherein the position of form-wound coil group and mould 3
Cavity is corresponding, and the gap between the lower face of form-wound coil and plate blank 2-1 can be 2mm, specific such as 3rd embodiment
In Fig. 4 shown in.
(3) first form-wound coil 1-1, the second form-wound coil 1-2 and the 3rd form-wound coil 1-3 are respectively connected to the first power supply 6-
1st, second source 6-2 and the 3rd power supply 6-3, during metal sheet blank 2-1 electro-magnetic formings, the first power supply 6-1, the second electricity
Source 6-2 and the 3rd power supply 6-3 discharge at the same time, and the first form-wound coil 1-1, the second form-wound coil 1-2 and the 3rd form-wound coil 1-3 are same
When be passed through pulse current, the inductive loop on metal sheet blank 2-1, so on metal sheet blank 2-1 produce electromagnetism pressure
Power, driving metal sheet blank 2-1 are deformed into metal works 2-2 positions.
(4) the first form-wound coil 1-1, the second form-wound coil 1-2 and the 3rd form-wound coil 1-3 are axially moveable, makes its each
Coil lower face edge is just contacted with deformed plate (metal works) 2-2 for the first time, but does not apply pressure.
(5) first power supply 6-1 electric discharges, second source 6-2 and the 3rd power supply 6-3 electric discharges, the first form-wound coil 1-1, second
Pulse current is passed through at the same time in form-wound coil 1-2 and the 3rd form-wound coil 1-3, inductive loop and is produced on metal works 2-2
Electromagnetic pressure, driving metal works 2-2 continue to deform.
Since the aluminum alloy materials electrical conductivity of the model is low, intensity is high, the electromagnetic pressure for generation of once discharging makes plate base
Material 2-1 be deformed into metal works 2-2, do not fitted closely completely with mould, by move the first form-wound coil 1-1, the second one-tenth
Shape coil 1-2 and the 3rd form-wound coil 1-3, reduces each coil its distance with metal works 2-2, the first power supply 6-1, the second electricity
Source 6-2 and the 3rd power supply 6-3 discharges again to be shaped to metal works 2-3 positions by metal works 2-2 and is closely pasted with mould
Close.
The electromagnetic forming device of metal sheet provided by the utility model, the design of coaxial form-wound coil group is with very high
Flexibility, can determine the number of form-wound coil group form-wound coil and every according to material properties, the dimensional parameters of plate blank
The structural parameters of a form-wound coil, series-parallel system and whether can move axially.It will be passed by the way of coaxial coil group
The unicoil shaped for plate of uniting is split into several independences or the coaxial unicoil that is mutually related, and can effectively improve electric discharge
During capacity usage ratio, form-wound coil structural strength and electromagnetic force field distribution controllability.
Fig. 7 is respectively under unicoil, twin coil shaping, and the electromagnetism force density in plate (is discharged with the discharge energy of coil
Voltage 5kV, 10kV or 15kV) variation tendency.Such as Fig. 7 a, for unicoil, increase discharge energy only changes plate
The amplitude of suffered electromagnetic force, but do not change the distribution of electromagnetic force.For twin coil, since two coils are respectively by two sets of electricity
Source individually controls, therefore can arbitrarily adjust discharge energy of two sets of power supplys to coil, and Fig. 7 b are the gross energy of two coils
Electromagnetism force density in plate when the discharge energy ratio of one timing, exterior loop 1-2 and interior loop 1-1 are respectively 0.5,1 and 2
Distribution situation, in the case of these three the distribution of electromagnetic force field have obvious difference.
Fig. 8 is the electric discharge time diagram of two form-wound coils, as shown in Figure 8 a, form-wound coil 1-1 and form-wound coil 1-2
Discharge at the same time, Fig. 8 b are first discharged for form-wound coil 1-1 after 150 μ s, and form-wound coil 1-2 electric discharges, Fig. 8 c are first put for form-wound coil 1-2
150 μ s postforming coils 1-1 of electricity discharge, it is necessary to illustrate, the electric current in form-wound coil 1-1 is denoted as I1, in form-wound coil 1-2
Electric current be denoted as I2.Here discharge time interval can be adjusted according to actual needs.During the different electric discharges of form-wound coil
Sequence determines the generation time for acting on electromagnetic force in plate, and when some form-wound coil first discharges, plate can become therewith
Shape, the discharge time of another or several form-wound coils at this moment can be determined according to the deformation of plate, is more advantageous to its generation
The electro-magnetic forming field of force of plate deformation, this has also absolutely proved that coaxial multi-pole coils adjust the flexibility of electromagnetic force field distribution.
Therefore, the discharge energy and electric discharge sequential that can adjust each power supply divide so as to obtain rational electromagnetic force field
Cloth, makes the distribution of electromagnetic force field become controllable.
As it will be easily appreciated by one skilled in the art that the above is only the preferred embodiment of the utility model only, not
To limit the utility model, any modification for being made where within the spirit and principles of the present invention, equivalent substitution and change
Into etc., it should be included within the scope of protection of this utility model.
Claims (6)
- A kind of 1. electromagnetic forming device of metal sheet, it is characterised in that including：Coaxial multiple form-wound coils and mould；The mould is used to carry metal sheet to be formed, and constrains the shaping form when metal sheet deforms；Coaxial multiple form-wound coils are placed on the top of the metal sheet, for when it is passed through pulse current, making Obtain and inductive loop is produced in the metal sheet, the magnetic field that the pulse current produces produces electromagnetism with inductive loop effect Power, so that the metal sheet is deformed into die forming under the driving of electromagnetic force；Coaxial multiple form-wound coils are used for the metal works and mould shaped when the metal sheet through electromagnetic force When not fitting closely, at least one form-wound coil axially movable, moves to the metal work in the multiple form-wound coil Above part, pulse current is passed through again in the multiple form-wound coil so that the metal works are under the driving of electromagnetic force It is deformed into mould and is tightly sticked to form with mould.
- 2. electromagnetic forming device according to claim 1, it is characterised in that shaped in coaxial multiple form-wound coils The diameter of coil increases successively, and the multiple form-wound coil forms nested structure, and each form-wound coil can move axially so.
- 3. electromagnetic forming device according to claim 1, it is characterised in that the magnetic field that the pulse current produces reaches gold Its direction is parallel with metal sheet when belonging to plate, and the direction of the inductive loop is opposite with the direction of the pulse current.
- 4. electromagnetic forming device according to claim 1, it is characterised in that each in coaxial multiple form-wound coils into The structural parameters of shape coil are determined according to the material properties and dimensional parameters of metal sheet to be formed.
- 5. electromagnetic forming device according to claim 1, it is characterised in that in multiple form-wound coils in each form-wound coil Size and the time for being passed through pulse current are definite according to being actually needed；Pulse current is passed through by controlling in each form-wound coil Size and time, are distributed with the electromagnetic force field for controlling the magnetic field that pulse current produces to be produced with inductive loop effect.
- 6. electromagnetic forming device according to any one of claims 1 to 5, it is characterised in that form-wound coil is pulse magnet Structure, in the case where ensuring insulation safety, when form-wound coil is placed on the top of the metal sheet, its lower face and gold The gap belonged between plate is the smaller the better.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721331855.8U CN207266988U (en) | 2017-10-11 | 2017-10-11 | A kind of electromagnetic forming device of metal sheet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721331855.8U CN207266988U (en) | 2017-10-11 | 2017-10-11 | A kind of electromagnetic forming device of metal sheet |
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| CN201721331855.8U Withdrawn - After Issue CN207266988U (en) | 2017-10-11 | 2017-10-11 | A kind of electromagnetic forming device of metal sheet |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107584001A (en) * | 2017-10-11 | 2018-01-16 | 华中科技大学 | The electromagnetic forming method and device of a kind of metal sheet |
| CN108723164A (en) * | 2018-05-23 | 2018-11-02 | 华中科技大学 | A kind of heat transfer board forming device and manufacturing process |
| CN109622722A (en) * | 2018-12-21 | 2019-04-16 | 中南大学 | A kind of device and method that coil strength and electro-magnetic forming efficiency can be improved |
| CN109807222A (en) * | 2019-03-29 | 2019-05-28 | 哈尔滨工业大学 | A kind of micro- blanking apparatus of electromagnetism and method |
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2017
- 2017-10-11 CN CN201721331855.8U patent/CN207266988U/en not_active Withdrawn - After Issue
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107584001A (en) * | 2017-10-11 | 2018-01-16 | 华中科技大学 | The electromagnetic forming method and device of a kind of metal sheet |
| CN107584001B (en) * | 2017-10-11 | 2023-07-25 | 华中科技大学 | Electromagnetic forming method and device for metal plate |
| CN108723164A (en) * | 2018-05-23 | 2018-11-02 | 华中科技大学 | A kind of heat transfer board forming device and manufacturing process |
| CN108723164B (en) * | 2018-05-23 | 2020-05-19 | 华中科技大学 | Heat transfer plate forming device and forming method |
| CN109622722A (en) * | 2018-12-21 | 2019-04-16 | 中南大学 | A kind of device and method that coil strength and electro-magnetic forming efficiency can be improved |
| CN109622722B (en) * | 2018-12-21 | 2021-01-26 | 中南大学 | Device and method capable of improving coil strength and electromagnetic forming efficiency |
| CN109807222A (en) * | 2019-03-29 | 2019-05-28 | 哈尔滨工业大学 | A kind of micro- blanking apparatus of electromagnetism and method |
| CN109807222B (en) * | 2019-03-29 | 2020-04-28 | 哈尔滨工业大学 | Electromagnetic micro-blanking device and method |
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