CN105170768B - A kind of current break causes the device and control method of electromagnetic attraction form metal plate - Google Patents
A kind of current break causes the device and control method of electromagnetic attraction form metal plate Download PDFInfo
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- CN105170768B CN105170768B CN201510669453.8A CN201510669453A CN105170768B CN 105170768 B CN105170768 B CN 105170768B CN 201510669453 A CN201510669453 A CN 201510669453A CN 105170768 B CN105170768 B CN 105170768B
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Abstract
The present invention relates to a kind of current break causes the device and control method of electromagnetic attraction form metal plate, including executable portion and power-supply system；Described executable portion includes actuating coil, mould, metal blank, and described mould is arranged between described actuating coil and metal blank, and the actuating coil is fixed together as executor with mould；The power-supply system includes control system, energy-storage system, charge circuit, discharge loop, the charge circuit, discharge loop are connected in parallel on the energy-storage system two ends respectively, the control system is electrically connected with the charge circuit, discharge loop, and described actuating coil is electrically connected with described discharge loop.The traditional electro-magnetic forming repulsive force of present invention conversion is captivation, actuating coil can be integrated with die assembly, reduces and coordinates difficulty, the use range of electromagnetic forming technique is expanded in technique.
Description
Technical field
The present invention relates to electro-magnetic forming field, particularly a kind of current break initiation electromagnetic attraction form metal plate
Device and control method.
Background technology
Electro-magnetic forming is mainly used in the forming manufacturing technology of conductive material, is that one kind is converted into magnetic field energy using electric energy
The method of form metal plate, often using electromagnetic repulsive force, such as China Patent Publication No. is traditional electro-magnetic forming equipment
The metal blank electromagnetic forming device that the document of CN101406913A is introduced, including coil, collection chinaware, workpiece and shaping dies.
Coil outer assembling collection chinaware is placed in the side of workpiece, collects the work surface of chinaware active set magnetic near workpiece.And shaping dies are then
Positioned at the opposite side of workpiece, by pulse high current in coil during shaping, repulsive force is produced between coil and workpiece and promoted
Workpiece makes workpiece be adjacent to mould to mold movement, with this Forming Workpiece.
But run into Forming Workpiece for closed area eyelid covering or covering operating mode when, described electro-magnetic forming equipment lacks
Point takes on and, and the mould of electro-magnetic forming equipment and coil are respectively placed in the both sides of workpiece first so that equipment is integrally divided into
Be inconvenient to operate in two parts；Shaping needs to need dismounting covering in advance, technique and operation all to become multiple in oppositely arranged mould
It is miscellaneous.
The content of the invention
In view of this, the purpose of the present invention is to propose to a kind of current break causes the dress of electromagnetic attraction form metal plate
Put and control method, simplify operation.
The device of the present invention is realized using below scheme：A kind of current break causes electromagnetic attraction form metal plate
Device, including executable portion and power-supply system；Described executable portion includes actuating coil, mould, metal blank, described mould
Tool is arranged between described actuating coil and metal blank, and the actuating coil is fixed together as execution with mould
Device；The power-supply system includes control system, energy-storage system, charge circuit, discharge loop, and the charge circuit is connected to described
Energy-storage system two ends, the discharge loop two ends are also connected to the energy-storage system two ends, the control system and the charging
Loop, discharge loop are electrically connected with, and described actuating coil is electrically connected with described discharge loop.
Preferably, power-supply system applies a slow electric current for rising in discharge loop, and when electric current is to peaking
Mutation, this function of current in the coil connected with discharge loop around coil are produced an induced field, and cause gold
In category plate, one inductive loop of generation is consistent with the sense of current in coil, and metal blank is moved to actuating coil, by mould
Restriction be configured to the shape specified.
Further, be applied to before the current break on the actuating coil as sinusoidal decay electric current, and meet I (t)=
Imaxe-βSin (ω t), the electric current are mutated rapid decrease when 1/4 cycle is to peaking, and before peak value, power frequency meetsAfter peak value, power frequency meetsWherein, I is electric current；E is natural number；β
For attenuation quotient；ω is angular frequency；T is the time, and f is frequency；μ0For metal blank pcrmeability；γ is metal blank electrical conductivity；d
For metal blank thickness.
Further, described actuating coil includes the copper cash for being wound in dish type and is coated on exhausted on the outside of the copper cash
Edge material, the two ends of the copper cash are connected with discharge loop as two inputs of the actuating coil.
Further, described discharge loop includes discharge switch K2 and current break module, described discharge switch K2
It is cascaded with the actuating coil, is connected to energy-storage system with the branch road of the actuating coil comprising the discharge switch K2
Two ends；The current break module is connected to the actuating coil two ends；The discharge switch K2 and current break module
It is electrical connected with the control system.Wherein described current break module can switch K3 with rapid cut-off or be serially connected
Auxiliary capacitor C3 ' and high-speed switch K3 '；Wherein described rapid cut-off switch K3 is controllable for IGCT with high-speed switch K3 '
Transwitch.Particularly, described current break module can also be fuse cutout K3 ", now the current break module and institute
State actuating coil series connection.Described fuse cutout K3 " carries out open circuit comprising fuse.
Further, described charge circuit includes being sequentially connected charge switch K1, rectification filtering module, inverter circuit
Module, high-frequency impulse voltage changing module and final rectification module；
Wherein, the rectification filtering module includes one first low frequency rectifier bridge, current-limiting resistance R2, filter capacitor CZAnd limit
Stream switch K4, industrial-frequency alternating current is connected with the input of the first low frequency rectifier bridge by the charge switch K1, and described the
The negative output terminal of one low frequency rectifier bridge is connected to one end of the current-limiting resistance R2, and the other end of the current-limiting resistance R2 is connected to
The filter capacitor CZOne end, the positive output end of the first low frequency rectifier bridge is connected to the filter capacitor CZThe other end,
The two ends of the current limiting switch K4 are connected with the two ends of the current-limiting resistance R2 respectively, wherein the charge switch K1 and described
Current limiting switch K4 is electrical connected with the control system；
Wherein, the inverter circuit module includes the first bridge arm electric capacity C1, the second bridge arm electric capacity C2, the first power protection mould
Block, the second power protection module, the first main power tube Tr1, the second main power tube Tr2, wherein the first bridge arm electric capacity C1, the second bridge
Arm electric capacity C2, the first main power tube Tr1And the second main power tube Tr2Half-bridge form is collectively formed, first power protects mould
Block and the second power protection module are connected in parallel on the first main power tube T respectivelyr1Colelctor electrode and emitter stage and the second main power
Pipe Tr2Colelctor electrode and emitter stage；Wherein described first power protection module and the second power protection module include mutually string
One resistance and an electric capacity of connection, the two ends of the resistance are simultaneously connected to a power diode；
Wherein, the high-frequency impulse voltage changing module includes armature winding, iron core and secondary windings, the armature winding
Two ends junction point and the second master respectively with the first bridge arm electric capacity C1 in the inverter circuit module and the second bridge arm electric capacity C2
Power tube Tr2Colelctor electrode, the two ends of the secondary windings are connected with the final rectification module；
Wherein, the final rectification module includes the second low frequency rectifier bridge 641, two inputs of the second low frequency rectifier bridge
End be connected with the two ends of the secondary windings in the high-frequency impulse voltage changing module, the positive output end of the second low frequency rectifier bridge and
Negative output terminal is connected in parallel to the two ends of the energy-storage system respectively.
Further, described energy-storage system includes the capacitor of N number of parallel connection, and the two ends of the capacitor are used as the storage
The two ends of energy system, wherein N is the positive integer more than or equal to 1.
The method of the present invention is realized using below scheme：A kind of current break based on described in claim 4 causes electromagnetism
The control method of the device of captivation form metal plate, specifically includes following steps：
Step S1:Executor comprising actuating coil and mould is placed in into the top of metal blank to be formed；
Step S2：Charge switch K1 closures in the charge circuit are controlled by control system, in the discharge loop
Rapid cut-off switch K3 or high-speed switch K3 ' open circuits in discharge switch K2 open circuits, current break module, energy-storage system start
Charge, industrial-frequency alternating current passes sequentially through rectification filtering module in the charge circuit, inverter circuit module, high-frequency impulse transformation
Module, final rectification module are completed to the charging of energy-storage system；Charge switch K1 is disconnected automatically subsequently；
Step S3：Closure discharge switch K2, the energy-storage system RLC loop complete with actuating coil, formation, in actuating coil
In the pulse heavy current that slowly risen by low frequency；
Step S4：Current break module in discharge loop certain hour linkage work after discharge switch K2 closures
Make, reversely apply the quick pulse heavy current of altofrequency, the current break rapid decrease in actuating coil；Wherein, it is described certain
Time rises to the time of maximum for electric current in actuating coil；
Step S5：In magnetic field and metal blank that the electric current of the slow rising rapid decrease applied in actuating coil causes
Inductive loop, promotes metal blank to move to actuating coil, is limited shaping by mould.
Present invention also offers a kind of cause electromagnetic attraction form metal plate based on current break mentioned above
The control method of device, specifically includes following steps：
Step S1:Executor comprising actuating coil and mould is placed in into the top of metal blank to be formed；
Step S2：Charge switch K1 closures in the charge circuit are controlled by control system, in the discharge loop
Fuse cutout K3 in discharge switch K2 open circuits, current break module " does not reach blowout current normal work, energy-storage system starts
Charge, industrial-frequency alternating current passes sequentially through rectification filtering module in the charge circuit, inverter circuit module, high-frequency impulse transformation
Module, final rectification module are completed to the charging of energy-storage system；Charge switch K1 is disconnected automatically subsequently；
Step S3：Closure discharge switch K2, the energy-storage system RLC loop complete with actuating coil, formation, in actuating coil
In the pulse heavy current that slowly risen by low frequency；
Step S4：Current break module in discharge loop certain hour linkage work after discharge switch K2 closures
Make, reversely apply the quick pulse heavy current of altofrequency, the current break rapid decrease in actuating coil；Wherein, it is described certain
Time rises to the time of maximum for electric current in actuating coil；
Step S5：In magnetic field and metal blank that the electric current of the slow rising rapid decrease applied in actuating coil causes
Inductive loop, promotes metal blank to move to actuating coil, is limited shaping by mould.
It is preferred that the generation of electromagnetic attraction is based on following principle：
The part related to Forming Theory is actuating coil, metal blank and mould.During work, apply in actuating coil
Pulse heavy current its waveform of one low frequency (slow) meets formula (1) for sinusoidal decay waveform.Require its magnetic field energy for producing
Electromagnetic screen and workpiece enough being permeated, vortex all being produced on two faces of electromagnetic screen and workpiece, according to Kelvin effect, this requires to apply
It is added in single turn actuating coil frequency fmaxIt is sufficiently low, that is, meet the requirement of formula (2).At this moment the di/dt very littles of coil current are flow through,
At this moment the faradic current very little in metal blank, the magnetic field force very little that then metal blank inner surface is subject to, are far not enough to reach
Yield point.So no matter electric current I values are increased to and much cannot also make metal blank deform.At this moment metal blank can be ignored
Interior faradic current and its induced field of generation, it is believed that the uniform magnetic for being produced in coil within and around metal blank all the time
In.When electric current rises to certain value ImWhen, reversely apply the pulse heavy current of altofrequency (quick), that is, be unsatisfactory for formula (2)
Require.Which is made with very big rate of change decay (even di/dt is changed into negative value, and its absolute value is very big), at this moment magnetic field is also dashed forward
So decay.
Understand to produce faradic current inside metal blank according to Lenz's law, the electric current side decayed in its direction and coil
To consistent, and faradic current produces induced field simultaneously.In the magnetic that metal blank inner space, induced field are produced with coil
Field direction is mutually cancelled out each other on the contrary, identical in metal blank space outerpace direction and strengthen.Its result makes metal blank outer surface
By powerful magnetic field force --- captivation, if metal blank stress reaches yield point, there is the change towards coil direction
Shape.
I (t)=Imaxe-βsin(ωt) (1)
In formula：I is electric current；E is natural number；β is attenuation quotient；ω is angular frequency；T is the time
In formula：F is frequency；μ0For metal blank pcrmeability；γ is metal blank electrical conductivity；D is sheet thickness
Further, control system control charge switch closure, when discharge switch is opened a way, the charge circuit gives energy storage system
System charges, and after charging reaches the energy specified, one feedback of charge circuit applying makes charge switch open circuit complete to charge.Charge back
Road external connection low pressure power current, includes rectification filtering module, inverter circuit module, high-frequency impulse transformation in charge circuit
Module, final rectification module, industrial-frequency alternating current through rectifying and wave-filtering, inverter circuit, high-frequency pulse transformer conversion, formed institute
The DC source of needs is made up of large value capacitor to energy-storage system, energy-storage system.
Further, charge switch open circuit, when discharge switch is closed, energy-storage system and actuating coil in the discharge loop
It is cascaded with protection inductance, and current break module is set in discharge loop equally by control system control.
Further, the current break module can be connected in parallel on actuating coil two ends, be a rapid cut-off switch,
Discharge switch closure after certain hour, electric current to peaking, closure rapid cut-off switch, originally by the electric current of coil transfer by
Current break module passes through, coil current rapid decrease.
Compared with prior art, the present invention has following beneficial effect：The present invention converts traditional electro-magnetic forming repulsive force
Actuating coil can be integrated by captivation with die assembly, reduce and coordinate difficulty, electromagnetic forming technique is expanded in technique
Use range.
Description of the drawings
Circuit and frock position view of the Fig. 1 for the removing charge circuit of the embodiment of the present invention 1.
Final molding schematic diagrams of the Fig. 2 for the embodiment of the present invention.
Schematic diagrams of the Fig. 3 for the charge circuit of the embodiment of the present invention.
Fig. 4 is the mutation current waveform of the present invention.
Circuit and frock position view of the Fig. 5 for the removing charge circuit of the embodiment of the present invention 2.
Circuit and frock position view of the Fig. 6 for the removing charge circuit of the embodiment of the present invention 3.
[primary clustering symbol description]
In figure：1 is actuating coil, and 2 is mould, and 3 is metal blank, and 4 is control system, and 5 is energy-storage system, and 6 are charging
Loop, 7 is discharge loop；11 is copper cash, and 12 is insulant；61 is rectification filtering module, and 62 is inverter circuit module, and 63 are
High-frequency impulse voltage changing module, 64 is final rectification module, and 65 is charge switch；71 is current break module；611 is the first low frequency
Rectifier bridge, 621 is the first power protection module, and 622 is the second power protection module, and 631 is armature winding, and 632 is iron core,
633 is secondary windings, and 641 is the second low frequency rectifier bridge.
Specific embodiment
Below in conjunction with the accompanying drawings and embodiment the present invention will be further described.
Embodiment 1.
As shown in figure 1, the device that a kind of current break causes electromagnetic attraction form metal plate is present embodiments provided,
Including executable portion and power-supply system；Described executable portion includes actuating coil 1, mould 2, metal blank 3, described mould
2 are arranged between described actuating coil 1 and metal blank 3, and the actuating coil 1 is fixed together conduct with mould 2
Executor；The power-supply system includes control system 4, energy-storage system 5, charge circuit 6, discharge loop 7, and the charge circuit connects
Be connected on the energy-storage system two ends, the discharge loop two ends are also connected to the energy-storage system two ends, the control system 4 with
The charge circuit 6, discharge loop 7 are electrically connected with, and described actuating coil is electrically connected with described discharge loop 7.
Preferably, power-supply system applies a slow electric current for rising in discharge loop, and when electric current is to peaking
Mutation, this function of current in the coil connected with discharge loop around coil are produced an induced field, and cause gold
In category plate, one inductive loop of generation is consistent with the sense of current in coil, and metal blank is moved to actuating coil, by mould
Restriction be configured to the shape specified.
In the present embodiment, it is sinusoidal decay electric current before being applied to the current break on the actuating coil, and meets I
(t)=Imaxe-βSin (ω t), the electric current are mutated rapid decrease when 1/4 cycle is to peaking, and before peak value, power frequency meetsAfter peak value, power frequency meetsWherein, I is electric current；E is natural number；β
For attenuation quotient；ω is angular frequency；T is the time, and f is frequency；μ0For metal blank pcrmeability；γ is metal blank electrical conductivity；d
For metal blank thickness.
In the present embodiment, described actuating coil includes the copper cash 11 for being wound in dish type and is coated on outside the copper cash
The insulant 12 of side, it is ensured that copper cash insulating properties between layers.The two ends of the copper cash as the actuating coil two
Input is connected with discharge loop.
In the present embodiment, as shown in figure 1, described discharge loop includes protecting inductance L1, discharge switch K2, quick short
Way switch K3, protective resistance R1；One end that one end of the protection inductance L1 switchs K3 with the rapid cut-off is respectively connecting to
The two ends of the energy-storage system, the other end of the protection inductance L1 are connected to one end of the discharge switch K2, described quick
The other end of short switch K3 is connected with the other end of the discharge switch K2, and the other end of the discharge switch K2 is additionally coupled to
One end of one end of protective resistance R1, the other end of protective resistance R1 and rapid cut-off switch K3 connects respectively
It is connected to two inputs of actuating coil；The discharge switch K2 and rapid cut-off switch K3 and the electrical phase of the control system
Even.The rapid cut-off switch is current break module 71.The rapid cut-off switch K3 is IGCT reverse-blocking tetrode thyristor.
In the present embodiment, as shown in figure 3, the described charge circuit charge switch K1 (65), whole that includes being sequentially connected
Stream filtration module 61, inverter circuit module 62, high-frequency impulse voltage changing module 63 and final rectification module 64；
The rectification filtering module includes one first low frequency rectifier bridge 611, current-limiting resistance R2, filter capacitor CZAnd current limliting
Switch K4, industrial-frequency alternating current are connected with the input of the first low frequency rectifier bridge by the charge switch K1, and described first
The negative output terminal of low frequency rectifier bridge is connected to one end of the current-limiting resistance R2, and the other end of the current-limiting resistance R2 is connected to institute
State filter capacitor CZOne end, the positive output end of the first low frequency rectifier bridge is connected to the filter capacitor CZThe other end, institute
The two ends for stating current limiting switch K4 are connected with the two ends of the current-limiting resistance R2 respectively, wherein the charge switch K1 and the limit
Stream switch K4 is electrical connected with the control system；Wherein, the current-limiting resistance R2 is to prevent surge current from damaging switch.
The inverter circuit module includes the first bridge arm electric capacity C1, the second bridge arm electric capacity C2, the first power protection module
621st, the second power protection module 622, the first main power tube Tr1, the second main power tube Tr2, wherein the first bridge arm electric capacity C1,
Two bridge arm electric capacity C2, the first main power tube Tr1And the second main power tube Tr2Half-bridge form is collectively formed, first power is protected
Shield module and the second power protection module are connected in parallel on the first main power tube T respectivelyr1Colelctor electrode and emitter stage and the second master
Power tube Tr2Colelctor electrode and emitter stage；Wherein described first power protection module and the second power protection module include phase
The resistance mutually connected and an electric capacity, the two ends of the resistance are simultaneously connected to a power diode；Wherein pass through two bridge arm electric capacity
Discharge and recharge realizing the change of the sense of current, and add power protection module to control the operation of inverter circuit module.
The high-frequency impulse voltage changing module includes armature winding 631, iron core 632 and secondary windings 633, it is described it is primary around
The two ends of group respectively with the junction point of the first bridge arm electric capacity C1 in the inverter circuit module and the second bridge arm electric capacity C2 and the
Two main power tube Tr2Colelctor electrode, the two ends of the secondary windings are connected with the final rectification module；
The final rectification module includes the second low frequency rectifier bridge, two inputs of the second low frequency rectifier bridge with it is described
The two ends of the secondary windings in high-frequency impulse voltage changing module are connected, the positive output end and negative output terminal of the second low frequency rectifier bridge
The two ends of the energy-storage system are connected in parallel to respectively.
In the present embodiment, described energy-storage system includes the capacitor of N number of parallel connection, and the two ends of the capacitor are used as institute
The two ends of energy-storage system are stated, wherein, N is the positive integer more than or equal to 1.
The present embodiment additionally provides a kind of based on current break initiation electromagnetic attraction form metal plate mentioned above
Device control method, mainly include the following steps that：
Step S1:Executor comprising actuating coil and mould is placed in into the top of metal blank to be formed；
Step S2：By control system control in the charge circuit charge switch K1 closure, current limiting switch K4 open circuit, institute
State the discharge switch K2 open circuits in discharge loop, rapid cut-off switch K3 to open a way, it is stable by external industrial-frequency alternating current input current
Afterwards, close current limiting switch K4 to start to charge up, industrial-frequency alternating current passes sequentially through rectification filtering module in the charge circuit, inversion
Circuit module, high-frequency impulse voltage changing module, final rectification module are completed to the charging of energy-storage system；Subsequently disconnect automatically charging to open
Close K1 and current limiting switch K4；
Step S3：Closure discharge switch K2, energy-storage system have been formed with actuating coil, protective resistance R1, protection inductance L1
Whole RLC loops, the pulse heavy current slowly risen by low frequency in actuating coil；
Step S4：Current break module in discharge loop certain hour linkage work after discharge switch K2 closures
Make, reversely apply the quick pulse heavy current of altofrequency, the current break rapid decrease in actuating coil；Wherein, it is described certain
Time rises to the time of maximum for electric current in actuating coil；
Step S5：In magnetic field and metal blank that the electric current of the slow rising rapid decrease applied in actuating coil causes
Inductive loop, promotes metal blank to move to actuating coil, is limited shaping such as Fig. 2 by mould.
Particularly, as shown in figure 4, power-supply system applies a slow electric current for rising in discharge loop, and in electric current
It is mutated to during peaking, this function of current produces one in the actuating coil connected with discharge loop around actuating coil 1
Individual induced field, and in causing metal blank 3, one inductive loop of generation is consistent with the sense of current in actuating coil, metal blank
3 move to actuating coil 1, are limited the shape for being configured to specify by mould 2.
The foregoing is only presently preferred embodiments of the present invention, all impartial changes done according to scope of the present invention patent with
Modification, should all belong to the covering scope of the present invention.
Embodiment 2
As shown in figure 5, with the difference of embodiment 1 being：Current break module 71 includes auxiliary capacitor C3 ' and quickly opens
The rapid cut-off switch K3 in K3 ' alternative embodiments 1 is closed, after auxiliary capacitor C3 ' is connected with high-speed switch K3 ', with active line
Circle is in parallel.Wherein, the high-speed switch K3 ' is IGCT reverse-blocking tetrode thyristor.Thus present embodiments provide a kind of based on above
Described current break causes the control method of the device of electromagnetic attraction form metal plate, mainly includes the following steps that：
Step S1:Executor comprising actuating coil and mould is placed in into the top of metal blank to be formed；
Step S2：By control system control in the charge circuit charge switch K1 closure, current limiting switch K4 open circuit, institute
State the discharge switch K2 open circuits in discharge loop, high-speed switch K3 ' to open a way, after being stablized by external industrial-frequency alternating current input current,
Closure current limiting switch K4 is started to charge up, and industrial-frequency alternating current passes sequentially through rectification filtering module in the charge circuit, inversion electricity
Road module, high-frequency impulse voltage changing module, final rectification module are completed to the charging of energy-storage system；Charge switch is disconnected automatically subsequently
K1 and current limiting switch K4；
Step S3：Closure discharge switch K2, energy-storage system have been formed with actuating coil, protective resistance R1, protection inductance L1
Whole RLC loops, the pulse heavy current slowly risen by low frequency in actuating coil；
Step S4：Current break module in discharge loop certain hour linkage work after discharge switch K2 closures
Make, reversely apply the quick pulse heavy current of altofrequency, the current break rapid decrease in actuating coil；Wherein, it is described certain
Time rises to the time of maximum for electric current in actuating coil；
Step S5：In magnetic field and metal blank that the electric current of the slow rising rapid decrease applied in actuating coil causes
Inductive loop, promotes metal blank to move to actuating coil, is limited shaping such as Fig. 2 by mould.
Embodiment 3
As shown in fig. 6, with the difference of embodiment 1 being：Current break module 71 includes fuse cutout K3 " alternative embodiments
Rapid cut-off switch K3 in 1, fuse cutout K3 " are connected with actuating coil.Wherein, described fuse cutout K3 is " comprising fusing
Device carries out open circuit.Thus present embodiments provide a kind of based on current break initiation electromagnetic attraction form metal mentioned above
The control method of the device of plate, mainly includes the following steps that：
Step S1:Executor comprising actuating coil and mould is placed in into the top of metal blank to be formed；
Step S2：By control system control in the charge circuit charge switch K1 closure, current limiting switch K4 open circuit, institute
State the discharge switch K2 open circuits in discharge loop, fuse cutout K3 " close, after being stablized by external industrial-frequency alternating current input current,
Closure current limiting switch K4 is started to charge up, and industrial-frequency alternating current passes sequentially through rectification filtering module in the charge circuit, inversion electricity
Road module, high-frequency impulse voltage changing module, final rectification module are completed to the charging of energy-storage system；Charge switch is disconnected automatically subsequently
K1 and current limiting switch K4；
Step S3：Closure discharge switch K2, energy-storage system have been formed with actuating coil, protective resistance R1, protection inductance L1
Whole RLC loops, the pulse heavy current slowly risen by low frequency in actuating coil；
Step S4：Current break module in discharge loop certain hour linkage work after discharge switch K2 closures
Make, fuse K3 " to disconnect, the current break rapid decrease in actuating coil；Wherein, the certain hour is electricity in actuating coil
Stream rises to the time of maximum；
Step S5：In magnetic field and metal blank that the electric current of the slow rising rapid decrease applied in actuating coil causes
Inductive loop, promotes metal blank to move to actuating coil, is limited shaping such as Fig. 2 by mould.
The foregoing is only presently preferred embodiments of the present invention, all impartial changes done according to scope of the present invention patent with
Modification, should all belong to the covering scope of the present invention.
Claims (10)
1. a kind of current break causes the device of electromagnetic attraction form metal plate, it is characterised in that：Including executable portion with
Power-supply system；Described executable portion includes actuating coil, mould, metal blank, and described mould is arranged on described work
Between coil and metal blank, the actuating coil is fixed together as executor with mould；The power-supply system bag
Control system, energy-storage system, charge circuit, discharge loop are included, the charge circuit is connected to the energy-storage system two ends, described
Discharge loop two ends are also connected to the energy-storage system two ends, and the control system is electrical with the charge circuit, discharge loop
Connection, described actuating coil are electrically connected with described discharge loop.
2. a kind of current break according to claim 1 causes the device of electromagnetic attraction form metal plate, its feature
It is：Described actuating coil includes the copper cash for being wound in dish type and the insulant being coated on the outside of the copper cash, described
The two ends of copper cash are connected with discharge loop as two inputs of the actuating coil.
3. a kind of current break according to claim 1 causes the device of electromagnetic attraction form metal plate, its feature to exist
In：It is sinusoidal decay electric current before being applied to the current break on the actuating coil, and meets I (t)=Imaxe-βSin (ω t), institute
State electric current and rapid decrease is mutated when 1/4 cycle is to peaking, power frequency meets before peak valuePeak
After value, power frequency meetsWherein, I is electric current；E is natural number；β is attenuation quotient；ω is angular frequency
Rate；T is the time, and f is frequency；μ0For metal blank pcrmeability；γ is metal blank electrical conductivity；D is metal blank thickness.
4. a kind of current break according to any one of claim 1-3 causes the dress of electromagnetic attraction form metal plate
Put, it is characterised in that：Described discharge loop includes discharge switch K2 and current break module, described discharge switch K2 and institute
State actuating coil to be cascaded, be connected to the two of energy-storage system with the branch road of the actuating coil comprising the discharge switch K2
End；The current break module is connected to the actuating coil two ends；The discharge switch K2 and current break module and institute
State control system to be electrical connected.
5. a kind of current break according to claim 4 causes the device of electromagnetic attraction form metal plate, its feature
It is：Described current break module is that rapid cut-off switchs K3；The rapid cut-off switch K3 is IGCT reverse-blocking tetrode thyristor.
6. a kind of current break according to claim 4 causes the device of electromagnetic attraction form metal plate, its feature
It is：Described current break module is auxiliary capacitor C3 ' and the high-speed switch K3 ' being serially connected；Described high-speed switch
K3 ' is IGCT reverse-blocking tetrode thyristor.
7. a kind of current break according to any one of claim 1-3 causes the dress of electromagnetic attraction form metal plate
Put, it is characterised in that：Described discharge loop includes discharge switch K2 and current break module, described discharge switch K2 and institute
State actuating coil to be cascaded, be connected to the two of energy-storage system with the branch road of the actuating coil comprising the discharge switch K2
End；The current break module is connected with the actuating coil, and the current break module is fuse cutout K3 "；The electric discharge
Switch K2 and current break module are electrical connected with the control system；Described fuse cutout K3 " is carried out comprising fuse
Open circuit.
8. a kind of current break according to any one of claim 1-3 causes the dress of electromagnetic attraction form metal plate
Put, it is characterised in that：Described energy-storage system includes the capacitor of N number of parallel connection, and the two ends of the capacitor are used as the energy storage
The two ends of system, wherein N are the positive integer more than or equal to 1.
9. a kind of current break based on described in claim 4 causes the controlling party of the device of electromagnetic attraction form metal plate
Method, it is characterised in that comprise the following steps：
Step S1:Executor comprising actuating coil and mould is placed in into the top of metal blank to be formed；
Step S2：The charge switch K1 closures in the charge circuit, the electric discharge in the discharge loop are controlled by control system
Switch K2 is opened a way, the switch K3 or high-speed switch K3 ' open circuits of the rapid cut-off in module, storage is mutated by control system control electric current
Can system start to charge up, industrial-frequency alternating current passes sequentially through rectification filtering module in the charge circuit, inverter circuit module, height
Frequency pulse transforming module, final rectification module are completed to the charging of energy-storage system；Charge switch K1 is disconnected automatically subsequently；
Step S3：Closure discharge switch K2, the energy-storage system RLC loop complete with actuating coil, formation, leads in actuating coil
Cross the pulse heavy current that low frequency slowly rises；
Step S4：Current break module in discharge loop certain hour linkage work after discharge switch K2 closures, instead
To the quick pulse heavy current of applying altofrequency, the current break rapid decrease in actuating coil；Wherein, the certain hour is
In actuating coil, electric current rises to the time of maximum；
Step S5：Sensing in magnetic field and metal blank that the electric current of the slow rising rapid decrease applied in actuating coil causes
Vortex, promotes metal blank to move to actuating coil, is limited shaping by mould.
10. a kind of current break based on described in claim 7 causes the control of the device of electromagnetic attraction form metal plate
Method, it is characterised in that comprise the following steps：
Step S1:Executor comprising actuating coil and mould is placed in into the top of metal blank to be formed；
Step S2：The charge switch K1 closures in the charge circuit, the electric discharge in the discharge loop are controlled by control system
Fuse cutout K3 in switch K2 open circuits, current break module " does not reach blowout current normal work, and energy-storage system starts to fill
Electricity, industrial-frequency alternating current pass sequentially through rectification filtering module in the charge circuit, inverter circuit module, high-frequency impulse and become pressing mold
Block, final rectification module are completed to the charging of energy-storage system；Charge switch K1 is disconnected automatically subsequently；
Step S3：Closure discharge switch K2, the energy-storage system RLC loop complete with actuating coil, formation, leads in actuating coil
Cross the pulse heavy current that low frequency slowly rises；
Step S4：Current break module in discharge loop certain hour linkage work after discharge switch K2 closures, instead
To the quick pulse heavy current of applying altofrequency, the current break rapid decrease in actuating coil；Wherein, the certain hour is
In actuating coil, electric current rises to the time of maximum；
Step S5：Sensing in magnetic field and metal blank that the electric current of the slow rising rapid decrease applied in actuating coil causes
Vortex, promotes metal blank to move to actuating coil, is limited shaping by mould.
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| CN201510669453.8A CN105170768B (en) | 2015-10-13 | 2015-10-13 | A kind of current break causes the device and control method of electromagnetic attraction form metal plate |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105537768B (en) * | 2016-02-29 | 2017-09-05 | 温州大学 | A kind of magnetic field assistant laser welding device and method |
| CN106944527B (en) * | 2017-04-01 | 2019-06-25 | 三峡大学 | A kind of pipe forming device and method based on electromagnetic attraction |
| CN108555111B (en) * | 2018-04-02 | 2023-06-02 | 三峡大学 | Pipe fitting electromagnetic flanging device and method based on radial repulsive force-axial attractive force time-sharing loading |
| CN108480450A (en) * | 2018-05-14 | 2018-09-04 | 福州大学 | A kind of electromagnetic attraction building mortion and method |
| CN108580642B (en) * | 2018-05-23 | 2019-08-13 | 华中科技大学 | A kind of the electromagnetism thermo shaping method and device of metal material |
| CN108421874B (en) * | 2018-05-25 | 2024-03-29 | 福州大学 | Electromagnetic bulging device and method for variable-section metal pipe |
| CN108856443B (en) * | 2018-06-13 | 2019-08-09 | 中南大学 | It is a kind of that the electromagnetic forming device and method continuing electromagnetic force are provided |
| CN110193546B (en) * | 2019-06-24 | 2020-07-10 | 华中科技大学 | Device and method for forming metal plate by single-power-supply single-coil electromagnetic attraction |
| CN113904564B (en) * | 2021-09-09 | 2023-09-22 | 广东福德电子有限公司 | Inductance coil charging and discharging power supply |
| CN114535395B (en) * | 2022-03-08 | 2023-08-01 | 三峡大学 | Method for processing aluminum alloy hollow plate based on pulse electromagnetic force |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US3279228A (en) * | 1964-03-11 | 1966-10-18 | Gen Dynamics Corp | Forming device and method |
| CN2136082Y (en) * | 1992-09-04 | 1993-06-16 | 珠海通用磁电有限公司 | Metal workpiece shaper operated by electromagnetic force |
| IL122794A (en) * | 1997-12-29 | 2001-01-28 | Pulsar Welding Ltd | Pulsed magnetic forming of dish from a planar plate |
| US7076981B2 (en) * | 2004-03-30 | 2006-07-18 | Bradley John R | Electromagnetic formation of fuel cell plates |
| CN102013494B (en) * | 2010-11-16 | 2012-11-21 | 哈尔滨工业大学 | Electromagnetic forming device and method for micro fuel cell metal bipolar plate microchannel |
| CN205042966U (en) * | 2015-10-13 | 2016-02-24 | 福州大学 | Current sudden change causes shaping sheet metal material's of electromagnetic attraction power device |
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