CN107186039A - It is a kind of to improve the device and method that electro-magnetic forming workpiece pastes mould - Google Patents
It is a kind of to improve the device and method that electro-magnetic forming workpiece pastes mould Download PDFInfo
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- CN107186039A CN107186039A CN201710302139.5A CN201710302139A CN107186039A CN 107186039 A CN107186039 A CN 107186039A CN 201710302139 A CN201710302139 A CN 201710302139A CN 107186039 A CN107186039 A CN 107186039A
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- mould
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- workpiece
- collection chinaware
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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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electromagnets (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
Improve the device and method that electro-magnetic forming workpiece pastes mould the present invention relates to a kind of, the present invention increases one or more collection chinaware devices outside driving coil, in the case of not changing loop construction, by collect chinaware coil energy be delivered to close to workpiece be difficult to paste mould region in, change the distribution of electromagnetic force, the electromagnetic force in the difficult patch mould region of increase, so that metal works seamless paste mould, improves forming accuracy.On the other hand, in the case where being changed without coil, by realizing the shaping to different workpieces with changing different collection chinaware devices, it can greatly increase the flexibility of device, and because magnetic concentrator structure is simple, process short time limit, material is generally most common copper, relative low price, relative to more emat coil, replacing collection chinaware is more flexible, and cost is also lower.
Description
Technical field
The invention belongs to metal forming manufacture field, more particularly to a kind of device for improving electro-magnetic forming workpiece patch mould and
Method.
Background technology
Lightweight is the important means and technological approaches of the industry manufacture field energy-saving and emission-reduction such as space flight, aviation, automobile, is realized
One of light-weighted main path is to use high performance light alloy material, such as aluminium alloy, magnesium alloy.But traditional shaping
There is bottleneck in technique, due to light alloy material, forming property is poor at room temperature to shaping alloy in lightweight, it is difficult to industry manufacture
It is required that.And electro-magnetic forming is to solve one of most potential technological means of alloy in lightweight forming difficulty.It is a kind of during electro-magnetic forming
High strain-rate in the pulse shaping technique of high-speed, its forming process can effectively improve the forming property of metal material, increase
Big forming limit, decreasing rebound simultaneously suppresses corrugation, thus be expected to be widely applied to the processing and manufacturing of alloy in lightweight.
Electro-magnetic forming is processed mainly for metal tube and plate, and technical scheme proposed by the present invention is mainly for light
The processing of matter alloy sheets.Prior art, which is mainly, takes stamping, and such as there is provided a kind of metallic plate by patent CN 101018626
Press molding equipment and press-processing method, stamping forming limit can be further improved compared to warm forging, and not
Produce fracture.And for example patent CN 101370603A strained there is provided a kind of mould that can be controlled in punch process, precision it is high,
And application good press molding equipment and press-processing method.
In existing electromagnetic forming technique, once driving coil coiling, then structure size determine substantially；Simultaneously as electromagnetism
In forming process, by very big electromagnetic force inside driving coil, to prevent coil from internal stress destruction occur, loop construction is basic
Based on symmetrical structure, otherwise easily there is stress concentration, the local weak point formed in structure influences coil life.Base
In these factors, during electro-magnetic forming, it may appear that distant phenomenon between regional area interior loop and workpiece, so that
The electromagnetic force for causing workpiece to be subject in regional area is not enough, and patch mould is poor, and then has influence on final forming accuracy.Separately
Outside, in existing electromagnetic forming technique, a loop construction be typically only capable to it is corresponding with a kind of workpiece, when more mold exchange or
When being processed to other shapes workpiece, it is necessary to coiling again, and the technique for coiling of Driving Coil of Electromagnetic Forming is more multiple
Miscellaneous, the prices of raw materials such as reinforcing fiber, epoxy resin for being used in winding process are sufficiently expensive, and frequently more emat coil is brought
Cost is also sufficiently expensive.
The content of the invention
The problem of being difficult to patch mould for workpiece regional area during solution electro-magnetic forming, the present invention proposes a kind of improvement electricity
Magnetic forming workpiece pastes the device and method of mould.
In order to solve the above-mentioned technical problem, the present invention proposes following technical scheme：One kind improves electro-magnetic forming workpiece patch mould
Property device, it includes capacitor power module, and the capacitor power module is connected with driving coil, and the driving coil is solid
It is scheduled on sliding block, and is arranged on the surface of dome-type mould, the top of the dome-type mould is fixed with gold by blank holder
Belong to plate；The driving coil includes multiturn multilayer；Collection chinaware module is installed in the driving coil.
The collection chinaware module includes solenoid coil collection chinaware, and the solenoid coil collection chinaware is arranged on driving coil
Outer radial, for changing radial electromagnetic force distribution.
The collection chinaware module also includes plate coil collection chinaware device, and the plate coil collection chinaware device, which is arranged on, to be driven
Moving winding bottom, for changing axial electromagnetic force distribution.
The solenoid coil collection chinaware inner surface length is equal with loop length, and internal diameter is more bigger than coil outer diameter, appearance
Face is inclined curved surface, is fitted with the madial wall of dome-type mould.
The upper surface of the plate coil collection chinaware device is close to the bottom of driving coil, outer radius and outside driving coil half
Footpath is consistent, and lower surface is close to workpiece surface.
Using the manufacturing process of building mortion described in any one, by workpiece to be formed after electro-magnetic forming, according to mould
The requirement of tool, radially occurs being difficult to patch mould region, by increasing a solenoid coil collection chinaware in driving coil outer radial
Device, is sent to energy close to the region of side walled workpieces, changes and is radially difficult to paste the distribution of electromagnetic force in mould region, realizes work
Part side wall seamless patch mould.
Workpiece is in axial distal end region, and appearance patch mould error is larger, by increasing by one in the axial bottom of driving coil
Plate coil collection chinaware device, is difficult to energy transfer in patch mould region to workpiece bottom in workpiece bottom section, is changed
Distribution of electromagnetic force, realize workpiece bottom seamless paste mould.
Collection chinaware device is axially and radially added simultaneously in same multiturn coil, while realizing in different zones
Loading.
For the higher difficult moulding material of some intensity, after driving coil impulse discharge, the deformation width that metal sheet is produced
Degree is little, it is difficult to paste mould, but now the distance between driving coil and metal sheet are increased, and electric discharge next time can not be produced
It is enough the electromagnetic force for driving workpiece to deform.The different collection chinaware of multiple sizes now can be successively added, a subjob is often shaped, i.e.,
Change a collection chinaware for more matching the current shape of workpiece, then discharged next time, by multiple discharge realize workpiece by
Step patch mould.
After more mold exchange, in the case where being changed without coil, the patch of different workpieces can be realized by changing collection chinaware
Mould.
The method have the advantages that：
1st, the present invention increases a solenoid coil collection chinaware device in driving coil outer radial, and its main function is,
Need not more emat coil, in the case of need not also changing loop construction, by solenoid coil collection chinaware device driving coil
Energy transmission to being more nearly in the region that metal works are radially difficult to paste mould, change and be radially difficult to paste the electromagnetism in mould region
Power is distributed, the electromagnetic force increase suffered by workpiece radial direction, workpiece side wall is pressed close to mould, patch mould precision is improved.
2nd, while increasing a plate coil collection chinaware device in the axial bottom of driving coil, its major function is to pass through
Plate coil collection chinaware device transfers energy to workpiece bottom and is difficult to paste in the region of mould, changes and is axially difficult in patch mould region
Distribution of electromagnetic force, the electromagnetic force increase suffered by workpiece bottom makes workpiece bottom press close to mould, patch mould precision is improved.
3rd, present invention also offers a kind of structure of solenoid coil collection chinaware, its structure is main according to driving coil and half
The design of Structural Parameters of spherical module, matches with the shape of workpiece, can effectively improve the precision of shaping.In addition, being changed without
In the case of driving coil, the collection chinaware device different by changing realizes the shaping to different workpieces, improves it and is difficult to paste
Forming accuracy in mould region.
4th, the present invention is in the case where being changed without, the collection chinaware device different by changing realize to different workpieces into
Shape, significantly increases the flexibility of device, and because magnetic concentrator structure is simple, processes short time limit, and material is general common
Copper, relative low price relative to more emat coil, changes that collection chinaware is more flexible, cost is also lower.
Brief description of the drawings
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is a kind of to improve the device schematic cross-section that electro-magnetic forming workpiece pastes mould.
Fig. 2（a）Original state schematic cross-section before being discharged before device improves under dome-type mould.
Fig. 2（b）The final shaped cross-section schematic diagram of workpiece before device improves under dome-type mould.
Fig. 3（a）Device radially improves the shaped cross-section schematic diagram during postforming under dome-type mould.
Fig. 3（b）The final shaped cross-section schematic diagram of workpiece after device radially improves under dome-type mould.
Fig. 4（a）Device axially improves the shaped cross-section schematic diagram during postforming under dome-type mould.
Fig. 4（b）The final shaped cross-section schematic diagram of workpiece after device axially improves under dome-type mould.
Fig. 5（a）The geometry schematic diagram of solenoid coil collection chinaware in device.
Fig. 5（b）The geometry schematic diagram of device middle plateform coil collection chinaware.
Embodiment
A kind of improvement electro-magnetic forming workpiece of the present invention pastes the method and device of mould, in order that the technology of the present invention
Scheme and advantage are more clearly understood, with reference to accompanying drawing, and the present invention is described in detail.Particularly point out, tool described herein
Body example is used only for explaining the present invention, is not intended to limit the present invention.
Electromagnetic forming device specific embodiment is as follows before improving：
Mould takes dome-type, such as Fig. 2（a）Shown, aluminium alloy panels 5 are positioned over the surface of dome-type mould 6, by blank holder
4 fix, and driving coil 2 is fixed in sliding block 1, and driving coil 2 is connected with capacitor power module 7, driving coil 2, dome-type
The central coaxial of mould 6 and aluminium alloy plate 5.
Fig. 2（a）Switch closure in original state before being discharged for whole device, capacitor power module 7, capacitor is put
Electricity, driving coil 2 surrounding produces pulsed magnetic field, and aluminium alloy panels 5 produce inductive loop, and aluminium alloy panels 5 are by axially downwardly
Electromagnetic force is deformed upon.After the completion of discharging for the first time, sliding block 1 drives driving coil 2 to be displaced downwardly to the intracavitary of dome-type mould 6,
Aluminium alloy panels 5 of the driving coil 2 after deforming for the first time, proceed in second of electric discharge, second of discharge process, aluminium
Alloy plate 5 continues to produce deformation under electromagnetic force.Above-mentioned steps are repeatedly until final shaping.Final shaping is such as
Fig. 2（b）It is shown.Fig. 2（b）Occurred in that in middle workpiece radial zone in gap 10, workpiece bottom section and also occur in that gap 11.
Electromagnetic forming device specific embodiment is as follows after radially improving：
Solve gap 10 to be effective, take increase in device as shown in Figure 3, the outer radial of driving coil 2 one it is special
Solenoid coil collection chinaware 3, solenoid coil collection chinaware 3 is fixed in driving coil 2.
The first time electric discharge of device and Fig. 2（a）It is described consistent；After the completion of discharging for the first time, sliding block 1 is moved down to mould
6 shape chambers, solenoid coil collection chinaware 3 is close to the sidewall locations of aluminium alloy panels 5, such as Fig. 3（a）It is shown, proceed to put for the second time
In electricity, second of discharge process, aluminium alloy plate 5 axially continues to produce downward deformation under electromagnetic force, in hemisphere pattern
The side wall of tool 6, due to the effect of solenoid coil collection chinaware 3, the inner surface 13 of solenoid coil collection chinaware 3 can be in discharge process
Middle inductive loop, vortex flows to outer surface 12 by the inner surface 13 of solenoid coil collection chinaware 3 through slit 9, now line solenoid
The outer surface 12 of circle collection chinaware 3 and the spacing of aluminium alloy panels 5 are smaller, and aluminium alloy panels 5 are increased by electromagnetic force, aluminium alloy plate
Sidewall direction deformation from part 5 to dome-type mould 6.
Continue to move axially sliding block 1, repeat the above steps, until the side wall of aluminium alloy panels 5 completes patch mould, such as Fig. 3（b）Institute
Show.
Electromagnetic forming device specific embodiment is as follows after axial bottom improves：
Effectively to solve gap 11, Fig. 4 is taken（a）Shown device, in the device shown in Fig. 3, increases in the bottom of driving coil 2
Plus a plate coil collection chinaware device 8, plate coil collection chinaware device 8 is fixed on driving coil 2.
Workflow and Fig. 3 before device（a）Described consistent, after the completion of multiple discharge, device repacks Fig. 4 into（a）Institute
Show, proceed to discharge, the surrounding of driving coil 2 generation pulsed magnetic field, the upper surface 16 of plate coil collection chinaware 8 meeting inductive loop,
Vortex flows to lower surface 14 by the upper surface of plate coil collection chinaware 8 through slit 15, and now the less lower surface of area is close to workpiece
Bottom, the electromagnetic force increase that the bottom of aluminium alloy panels 5 is subject to, aluminium alloy panels 5 are to the bottom deformation of dome-type mould 6, and workpiece is complete
Into patch mould, such as Fig. 4（b）It is shown.
Geometry such as Fig. 5 of solenoid coil collection chinaware 3（a）Shown, inner surface length is equal with loop length, internal diameter
More bigger than coil outer diameter, outer surface is inclined curved surface, close to side walled workpieces.The geometry such as Fig. 5 of plate coil collection chinaware 8
（b）It is shown.
The course of work and operation principle of the present invention：
To solve the problem of workpiece regional area during electro-magnetic forming is difficult to patch mould, the present invention propose it is a kind of improve electromagnetism into
Shape workpiece pastes the device and method of mould.The present invention increases a solenoid coil collection chinaware dress in driving coil outer radial
Put, its main function is, need not more emat coil, in the case of need not also changing loop construction, pass through solenoid coil collection
Chinaware device is radially difficult to the energy transmission of driving coil in the region of patch mould to metal works are more nearly, and changes radially difficult
To paste the distribution of electromagnetic force in mould region, the electromagnetic force increase suffered by workpiece radial direction makes workpiece side wall press close to mould, patch mould essence
Degree is improved；Increase a plate coil collection chinaware device in the axial bottom of driving coil simultaneously, its major function is to pass through flat board
Coil collection chinaware device transfers energy to workpiece bottom and is difficult to paste in the region of mould, changes and is axially difficult to paste the electricity in mould region
Magnetic force distribution, the electromagnetic force increase suffered by workpiece bottom, makes workpiece bottom press close to mould, and patch mould precision is improved.The present invention is also
There is provided a kind of structure of solenoid coil collection chinaware, its structure is main according to driving coil and the structural parameters of dome-type mould
Design, matches with the shape of workpiece, can effectively improve the precision of shaping.In addition, in the case where being changed without driving coil, leading to
Cross and change different collection chinaware devices to realize the shaping to different workpieces, improve it and be difficult to paste the forming accuracy in mould region.
By above-mentioned description, those skilled in the art completely can be in the model without departing from this invention technological thought
In enclosing, various changes and amendments are carried out all within protection scope of the present invention.The unaccomplished matter of the present invention, belongs to ability
The common knowledge of field technique personnel.
Claims (9)
1. a kind of improve the building mortion that electro-magnetic forming workpiece pastes mould, it is characterised in that：It includes capacitor power module
（7）, the capacitor power module（7）With driving coil（2）It is connected, the driving coil（2）It is fixed on sliding block（1）On, and
It is arranged on dome-type mould（6）Surface, the dome-type mould（6）Top pass through blank holder（4）It is fixed with metallic plate
Part（5）；The driving coil（2）Include multiturn multilayer；The driving coil（2）On be provided with collection chinaware module.
2. a kind of according to claim 1 improve the building mortion that electro-magnetic forming workpiece pastes mould, it is characterised in that：The collection
Chinaware module includes solenoid coil collection chinaware（3）, the solenoid coil collection chinaware（3）Installed in driving coil（2）It is outside
Radially, for changing radial electromagnetic force distribution.
3. a kind of according to claim 1 improve the building mortion that electro-magnetic forming workpiece pastes mould, it is characterised in that：The collection
Chinaware module also includes plate coil collection chinaware device（8）, the plate coil collection chinaware device（8）Installed in driving coil
（2）Bottom, for changing axial electromagnetic force distribution.
4. a kind of according to claim 2 improve the building mortion that electro-magnetic forming workpiece pastes mould, it is characterised in that：The spiral shell
Spool coil collection chinaware（3）Inner surface length is equal with loop length, and internal diameter is more bigger than coil outer diameter, and outer surface is inclined song
Face, with dome-type mould（6）Madial wall fit.
5. a kind of according to claim 3 improve the building mortion that electro-magnetic forming workpiece pastes mould, it is characterised in that：It is described flat
Board coil collection chinaware device（8）Upper surface close to the bottom of driving coil, outer radius is consistent with driving coil outer radius, following table
Face is close to workpiece surface.
6. using the manufacturing process of building mortion described in claim 1-5 any one, it is characterised in that：By workpiece to be formed
After electro-magnetic forming, according to the requirement of mould, radially occur being difficult to patch mould region, by driving coil（2）Outer radial increases
Plus a solenoid coil collection chinaware device（3）, energy is sent to close to the region of side walled workpieces, changes and is radially difficult to paste mould
Distribution of electromagnetic force in region, realizes that workpiece side wall seamless pastes mould；
There is larger patch mould error, by driving coil in axial distal end region in workpiece（2）Axial bottom increases by one and put down
Board coil collection chinaware device（8）, energy transfer is difficult in patch mould region to workpiece bottom in workpiece bottom section, is changed
Distribution of electromagnetic force, realize workpiece bottom seamless paste mould.
7. a kind of according to claim 6 improve the manufacturing process that electro-magnetic forming workpiece pastes mould, it is characterised in that：Same
Axially and radially adding simultaneously for individual multiturn coil collects chinaware device, is loaded while realizing in different zones.
8. a kind of according to claim 6 improve the manufacturing process that electro-magnetic forming workpiece pastes mould, it is characterised in that：For certain
The higher difficult moulding material of a little intensity, driving coil（2）After impulse discharge, metal sheet（5）The amplitude of deformation of generation is less, difficult
To paste mould, but now driving coil（2）And metal sheet（5）The distance between it is increased, next time electric discharge can not produce foot
To drive the electromagnetic force that workpiece is deformed, the different collection chinaware of multiple sizes now can be successively added, a subjob is often shaped, i.e., more
Change one and more match the collection chinaware of the current shape of workpiece, then discharged next time, realize workpiece progressively by multiple discharge
Paste mould.
9. a kind of according to claim 6 improve the manufacturing process that electro-magnetic forming workpiece pastes mould, it is characterised in that：Changing
After mould, in the case where being changed without coil, the patch mould of different workpieces can be realized by changing collection chinaware.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710302139.5A CN107186039B (en) | 2017-05-02 | 2017-05-02 | A kind of device and method improving electro-magnetic forming workpiece mold |
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|---|---|---|---|
| CN201710302139.5A CN107186039B (en) | 2017-05-02 | 2017-05-02 | A kind of device and method improving electro-magnetic forming workpiece mold |
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| CN107186039A true CN107186039A (en) | 2017-09-22 |
| CN107186039B CN107186039B (en) | 2019-09-24 |
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Cited By (13)
| 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 |
| CN108687211A (en) * | 2018-05-25 | 2018-10-23 | 福州大学 | A kind of metal pipe material Electromagnetic bulging apparatus and method |
| CN109647963A (en) * | 2018-12-27 | 2019-04-19 | 华中科技大学 | A kind of electromagnetism orthopedic appliance and straightening method |
| CN109702072A (en) * | 2018-12-29 | 2019-05-03 | 华中科技大学 | A kind of metalwork electromagnetic attraction forming device |
| CN109746302A (en) * | 2019-02-22 | 2019-05-14 | 河南科技大学 | Magneto-rheological combined soft mode and sheet material forming method based on magneto-rheological combined soft mode |
| CN109807488A (en) * | 2019-02-27 | 2019-05-28 | 重庆科技学院 | Panel surface electromagnetic force type variable electromagnetic pulse soldering apparatus |
| CN109865760A (en) * | 2018-12-19 | 2019-06-11 | 华中科技大学 | A kind of electromagnetic forming device and method based on modularization collection chinaware |
| CN111194248A (en) * | 2017-09-26 | 2020-05-22 | 皮斯特产品股份有限公司 | Electromagnetic pulse coil with replaceable conductor |
| WO2021129338A1 (en) * | 2019-12-23 | 2021-07-01 | 华中科技大学 | Device for decoupling electric effects in electromagnetic forming process |
| CN113059048A (en) * | 2021-03-23 | 2021-07-02 | 华中科技大学 | Precise forming device and method for miniature metal device |
| CN113182446A (en) * | 2021-05-13 | 2021-07-30 | 中南大学 | Current-assisted metal pipe electromagnetic forming device and forming method |
| CN115255362A (en) * | 2022-07-22 | 2022-11-01 | 武汉理工大学 | Powder electromagnetic axial pressing device and pressing method |
| CN116550847A (en) * | 2023-07-10 | 2023-08-08 | 成都飞机工业（集团）有限责任公司 | Electromagnetic forming device and electromagnetic forming matrix |
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| CN111194248A (en) * | 2017-09-26 | 2020-05-22 | 皮斯特产品股份有限公司 | Electromagnetic pulse coil with replaceable conductor |
| 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 |
| CN108687211A (en) * | 2018-05-25 | 2018-10-23 | 福州大学 | A kind of metal pipe material Electromagnetic bulging apparatus and method |
| CN109865760B (en) * | 2018-12-19 | 2020-09-18 | 华中科技大学 | Electromagnetic forming device and method based on modular magnetic collector |
| CN109865760A (en) * | 2018-12-19 | 2019-06-11 | 华中科技大学 | A kind of electromagnetic forming device and method based on modularization collection chinaware |
| CN109647963A (en) * | 2018-12-27 | 2019-04-19 | 华中科技大学 | A kind of electromagnetism orthopedic appliance and straightening method |
| CN109702072A (en) * | 2018-12-29 | 2019-05-03 | 华中科技大学 | A kind of metalwork electromagnetic attraction forming device |
| CN109702072B (en) * | 2018-12-29 | 2020-06-09 | 华中科技大学 | Metal part electromagnetic attraction forming device |
| CN109746302A (en) * | 2019-02-22 | 2019-05-14 | 河南科技大学 | Magneto-rheological combined soft mode and sheet material forming method based on magneto-rheological combined soft mode |
| CN109807488A (en) * | 2019-02-27 | 2019-05-28 | 重庆科技学院 | Panel surface electromagnetic force type variable electromagnetic pulse soldering apparatus |
| WO2021129338A1 (en) * | 2019-12-23 | 2021-07-01 | 华中科技大学 | Device for decoupling electric effects in electromagnetic forming process |
| CN113059048A (en) * | 2021-03-23 | 2021-07-02 | 华中科技大学 | Precise forming device and method for miniature metal device |
| CN113182446A (en) * | 2021-05-13 | 2021-07-30 | 中南大学 | Current-assisted metal pipe electromagnetic forming device and forming method |
| CN115255362A (en) * | 2022-07-22 | 2022-11-01 | 武汉理工大学 | Powder electromagnetic axial pressing device and pressing method |
| CN115255362B (en) * | 2022-07-22 | 2024-02-27 | 武汉理工大学 | Powder electromagnetic axial pressing device and pressing method |
| CN116550847A (en) * | 2023-07-10 | 2023-08-08 | 成都飞机工业（集团）有限责任公司 | Electromagnetic forming device and electromagnetic forming matrix |
| CN116550847B (en) * | 2023-07-10 | 2023-11-10 | 成都飞机工业（集团）有限责任公司 | Electromagnetic forming device and electromagnetic forming matrix |
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