CN107096815B - A kind of the pipe fitting electromagnetism hemmer and method of radial-axial electromagnetic force timesharing load - Google Patents
A kind of the pipe fitting electromagnetism hemmer and method of radial-axial electromagnetic force timesharing load Download PDFInfo
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- CN107096815B CN107096815B CN201710414887.2A CN201710414887A CN107096815B CN 107096815 B CN107096815 B CN 107096815B CN 201710414887 A CN201710414887 A CN 201710414887A CN 107096815 B CN107096815 B CN 107096815B
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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
- B21D19/00—Flanging or other edge treatment, e.g. of tubes
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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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Abstract
A kind of the pipe fitting electromagnetism hemmer and method of radial-axial electromagnetic force timesharing load, including：Radial electromagnetic force loading coil, axial electromagnetic force loading coil, mold, capacitor power, flange workpiece is placed in mould inside, radial electromagnetic force loading coil is placed in flange inside workpiece, and axial electromagnetic force loading coil is placed in the outside of flange workpiece, and flange workpiece, mold, radial electromagnetic force loading coil, axial electromagnetic force loading coil axis overlap.Axial electromagnetic force loading coil and fly-wheel diode differential concatenation, then in parallel with radial electromagnetic force loading coil, capacitor power is the coil power supply connected by discharge switch.The present invention uses the pipe fitting electromagnetism flange of radial-axial electromagnetic force timesharing load, is loaded by substep timesharing, can effectively improve the pad pasting of flange workpiece；Using " by axial electromagnetic force loading coil and fly-wheel diode differential concatenation, then in parallel with radial electromagnetic force loading coil ", timesharing load radial electromagnetic force and axial electromagnetic force can be simply and effectively realized, device is easy to operate, at low cost.
Description
Technical field
The invention belongs to metal forming manufacturing field, more particularly to a kind of pipe fitting of radial-axial electromagnetic force timesharing load
Electromagnetism hemmer and method are mainly used for the flange processing of metal tube.
Background technology
Lightweight is the important technical that energy-saving and emission-reduction are realized in the fields such as aerospace, auto industry.And realize light weight
The main path of change is to use light alloy material, and high-performance aluminium alloy, titanium alloy, magnesium alloy become modern aerospace, vapour
Turner industry etc. realizes light-weighted preferred material；Electro-magnetic forming is a kind of high-speed pulse shaping technique, can greatly improve metal
Material property is one of the effective means for solving alloy in lightweight forming difficulty.
In existing pipe fitting electromagnetism turn-up process, only relies on the driving coil on the inside of workpiece and radial electromagnetic force is provided, at
Discharge voltage needed for shape is high, and pad pasting hardly results in guarantee.
Electromagnetism flange is one kind of electromagnetic forming technique, the radial electromagnetic force provided at present by driving coil, pad pasting
Difference.Chinese patent " a kind of alloy pipe fitting Electromagnetic bulging and flange synchronous forming device and method（CN 104874664 A）" open
A kind of alloy pipe fitting Electromagnetic bulging and flange synchronous forming device and method, realize bulging and flange synchronous forming, reduction
Workpiece is sprung back, and reduces mold manufacturing difficulty.Then solenoid coil only provides radial electromagnetic force, the pad pasting of flange in this method
Property is poor.
Invention content
For this purpose, effectively to solve the problems, such as that current pipe fitting electromagnetism flange pad pasting is poor, the present invention provides a kind of radial-axial
The pipe fitting electromagnetism hemmer and method of electromagnetic force timesharing load, the pipe fitting electromagnetism loaded using radial-axial electromagnetic force timesharing
Flange is loaded by substep timesharing, can effectively improve the pad pasting of flange workpiece；Using " by axial electromagnetic force loading coil with
Fly-wheel diode differential concatenation, then in parallel with radial electromagnetic force loading coil ", it can simply and effectively realize that timesharing load is radial
Electromagnetic force and axial electromagnetic force, device is easy to operate, at low cost.
The technical solution that the present invention takes is：
A kind of pipe fitting electromagnetism hemmer of radial-axial electromagnetic force timesharing load, including：
Radial electromagnetic force loading coil provides radial electromagnetic force for the flange workpiece of initial profile；
Axial electromagnetic force loading coil, the flange workpiece after being loaded for radial electromagnetic force provide axial electromagnetic force；
Mold；
With the fly-wheel diode of axial electromagnetic force loading coil differential concatenation；
Capacitor power provides energy for radial electromagnetic force loading coil and axial electromagnetic force loading coil.
Flange workpiece is placed in mould inside, and radial electromagnetic force loading coil is placed in flange inside workpiece, and axial electromagnetic force adds
Carry the outside that coil is placed in flange workpiece, flange workpiece, mold, radial electromagnetic force loading coil, axial electromagnetic force loading coil
Axis overlaps；
Axial electromagnetic force loading coil and fly-wheel diode differential concatenation, it is then in parallel with radial electromagnetic force loading coil,
Capacitor power is the coil power supply connected by discharge switch.
The axial electromagnetic force loading coil is hollow cylinder, or the solid after circular cone is cut for hollow cylinder.
The height of the radial electromagnetic force loading coil is equal to the flange height of flange workpiece.
The difference of the inner and outer diameter of the axial electromagnetic force loading coil is equal to the flange height of flange workpiece.
The interior diameter of the axial electromagnetic force loading coil is compared with the overall diameter of flange workpiece, the thickness of big twice of flange workpiece
Degree.
The pipe fitting electromagnetism hemmer and method, advantage of a kind of radial-axial electromagnetic force timesharing load of the present invention are：
1. the present invention realizes the pipe fitting electromagnetism flange of radial-axial electromagnetic force timesharing load, for more traditional flange, electricity
Magnetic forming forming speed is fast, can promote the material forming limit.
2. the present invention is using the pipe fitting electromagnetism flange of radial-axial electromagnetic force timesharing load, for more existing electromagnetism flange,
It is loaded by substep timesharing, the pad pasting of flange workpiece can be effectively improved.
3. the present invention using " by axial electromagnetic force loading coil and fly-wheel diode differential concatenation, then with radial electromagnetism
Power loading coil is in parallel ", it can simply and effectively realize timesharing load radial electromagnetic force and axial electromagnetic force, device is easy to operate,
It is at low cost.
Description of the drawings
Fig. 1 is the pipe fitting electromagnetism hemmer assembling schematic diagram of radial-axial electromagnetic force timesharing load.
Fig. 1（a）For the pipe fitting electromagnetism hemmer assembling schematic diagram of radial-axial electromagnetic force timesharing load；
Fig. 1（b）Pipe fitting electromagnetism hemmer for radial-axial electromagnetic force timesharing load assembles diagrammatic cross-section.
Fig. 2 is the radial-axial electromagnetic force for the axial electromagnetic force loading coil that circular cone solid is cut using hollow cylinder
The pipe fitting electromagnetism hemmer assembling schematic diagram of timesharing load；
Fig. 2（a）The radial-axial electromagnetism of the axial electromagnetic force loading coil of circular cone solid is cut for use hollow cylinder
The pipe fitting electromagnetism hemmer assembling schematic diagram of power timesharing load；
Fig. 2（b）The radial-axial electromagnetism of the axial electromagnetic force loading coil of circular cone solid is cut for use hollow cylinder
The pipe fitting electromagnetism hemmer of power timesharing load assembles diagrammatic cross-section.
Fig. 3 is pipe fitting electromagnetism method for flanging circuit connection and the pulse current signal of radial-axial electromagnetic force timesharing load
Figure.
Fig. 3（a）For the pipe fitting electromagnetism method for flanging circuit connection schematic diagram of radial-axial electromagnetic force timesharing load；
Fig. 3（b）The pipe fitting electromagnetism method for flanging pulse current schematic diagram of radial-axial electromagnetic force timesharing load.
Fig. 4 is the flange workpiece and its distribution of electromagnetic force schematic diagram of different phase；
Fig. 4（a）Flange workpiece for initial profile and its radial electromagnetic force schematic diagram that is subject to,
Fig. 4（b）Flange workpiece after being loaded for radial electromagnetic force and its axial electromagnetic force schematic diagram that is subject to,
Fig. 4（c）Flange workpiece schematic diagram after being loaded for axial electromagnetic force.
Wherein：1. radial electromagnetic force loading coil；2. axial electromagnetic force loading coil；3. flange workpiece；31. initial wheel
Wide flange workpiece；32. the flange workpiece after radial electromagnetic force load；33. the flange workpiece after axial electromagnetic force load；4.
Mold；5. fly-wheel diode；6. capacitor power；7. pulse current；71. the pulse current of radial electromagnetic force loading coil；
72. the pulse current of axial electromagnetic force loading coil；8. electromagnetic force；81. radial electromagnetic force；82. axial electromagnetic force.
Specific implementation mode
A kind of pipe fitting electromagnetism hemmer of radial-axial electromagnetic force timesharing load, including：
Radial electromagnetic force loading coil 1 provides radial electromagnetic force for the flange workpiece 31 of initial profile；
Axial electromagnetic force loading coil 2 provides axial electromagnetic force for the flange workpiece 32 after radial electromagnetic force load；
Mold 4；
With the fly-wheel diode 5 of 2 differential concatenation of axial electromagnetic force loading coil；
Capacitor power 6 provides energy for radial electromagnetic force loading coil 1 and axial electromagnetic force loading coil 2.
Flange workpiece is placed in inside mold 4, and radial electromagnetic force loading coil 1 is placed in flange inside workpiece, axial electromagnetic force
Loading coil 2 is placed in the outside of flange workpiece, flange workpiece, mold 4, radial electromagnetic force loading coil 1, axial electromagnetic force load
2 axis of coil overlaps；
Axial electromagnetic force loading coil 2 and 5 differential concatenation of fly-wheel diode, then simultaneously with radial electromagnetic force loading coil 1
Connection, capacitor power 6 is the coil power supply connected by discharge switch.It does so and timesharing load may be implemented, that is, be closed electric discharge
Switch, capacitor power 6 first discharge to radial electromagnetic force loading coil 1；When capacitor power voltage is 0, fly-wheel diode is certainly
Dynamic conducting is just that axial electromagnetic force loading coil 2 is powered at this time.
The axial electromagnetic force loading coil 2 is hollow cylinder, or the solid after circular cone is cut for hollow cylinder.
Axial electromagnetic force loading coil 2 is hollow cylinder, simple and practicable；It is cooperation that the solid after circular cone is cut for hollow cylinder then
The shape of workpiece deformation, makes the spacing smaller between workpiece and coil, reaches the higher purpose of coupling efficiency.
The height of radial electromagnetic force loading coil 1 is equal to the flange height of flange workpiece, and radial electromagnetic force can be made to generate effect
Rate is high.
The difference of the inner and outer diameter of axial electromagnetic force loading coil 2 is equal to the flange height of flange workpiece, can make axial magnetic
Power generation efficiency is high.
The thickness of the interior diameter of axial electromagnetic force loading coil 2 twice of flange workpiece big compared with the overall diameter of flange workpiece is
Geometrical interference occurs in deformation process in order to prevent.
A kind of pipe fitting electromagnetism method for flanging of radial-axial electromagnetic force timesharing load, includes the following steps：
First, flange workpiece is placed in inside mold 4, and make to need the side of flange to be higher by flange workpiece compared with mould ends
Flange height, radial electromagnetic force loading coil 1 is placed in flange inside workpiece, and ensure the end of its upper surface and flange workpiece
Portion flushes, and axial electromagnetic force loading coil 2 is placed in the outside of flange workpiece, and makes the bottom of axial electromagnetic force loading coil 2
The end of inside radius and flange workpiece is coplanar, flange workpiece, mold 4, radial electromagnetic force loading coil 1 and axial electromagnetic force load
2 axis of coil overlaps；
Second, then axial electromagnetic force loading coil 2 and 5 differential concatenation of fly-wheel diode are loaded with radial electromagnetic force
Coil 1 is in parallel, and capacitor power 6 is the coil power supply connected by discharge switch；
Third is closed discharge switch, and capacitor power 6 first discharges to radial electromagnetic force loading coil 1, generates radial electromagnetism
The pulse current of power loading coil 1, pulse current generate inductive loop, pulse current and sense in the flange workpiece of initial profile
Vortex interaction is answered, radial electromagnetic force driving flange workpiece is generated and accelerates and deform, the flange workpiece of initial profile is deformed into
Flange workpiece after radial electromagnetic force load；
4th, when 6 voltage of capacitor power is 0, fly-wheel diode 5 is connected automatically, generates axial electromagnetic force loading coil
Pulse current, pulse current generates inductive loop in the flange workpiece after radial electromagnetic force load, pulse current and induction
Vortex interaction generates axial magnetic power drive flange workpiece and accelerates and deform, and the flange workpiece after radial electromagnetic force load becomes
Shape is the flange workpiece after axial electromagnetic force load, completes flange processing.
Pulse current effective load time of radial electromagnetic force loading coil 1 is first half-wave, from 0 to t1 moment；Axis
It it is second half-wave, the moment from t1 to t2 to pulse current effective load time of electromagnetic force loading coil 2.Realize point of load
When, the workpiece for starting state needs to load radial electromagnetic force, therefore when the pulse current of radial electromagnetic force loading coil 1 effectively loads
Between be first half-wave, from 0 to t1 moment；Flange workpiece after axial electromagnetic force load needs to load axial electromagnetic force, therefore axis
It it is second half-wave, the moment from t1 to t2 to pulse current effective load time of electromagnetic force loading coil 2.
Radial electromagnetic force makes flange workpiece be deformed into the flange workpiece profile after radial electromagnetic force load by initial profile；
Axial electromagnetic force, after the flange workpiece profile after making flange workpiece be loaded by radial electromagnetic force is deformed into axial electromagnetic force load
Flange workpiece profile.Workpiece flange can be analyzed to radial expanding and two processes of axial deformation, so the present invention is added using timesharing
Flange efficiency can be effectively improved by carrying radial electromagnetic force and axial electromagnetic force realization.Therefore make flange workpiece by first using radial electromagnetic force
Beginning profile is deformed into the flange workpiece profile after radial electromagnetic force load；Make flange workpiece by radial electromagnetism using axial electromagnetic force
Flange workpiece profile after power load is deformed into the flange workpiece profile after axial electromagnetic force load.
Embodiment 1：
As shown in Figure 1 using hollow cylinder radial electromagnetic force loading coil, specific steps include：Step 1, according to Fig. 1
It is shown, flange workpiece is placed in mould inside, and keep the flange for needing the side of flange to be higher by flange workpiece compared with mould ends high
Degree, is placed in flange inside workpiece, and ensure that its upper surface and the end of flange workpiece are flushed by radial electromagnetic force loading coil, will
Axial electromagnetic force loading coil is placed in the outside of flange workpiece, and makes the bottom inside radius and flange of axial electromagnetic force loading coil
The end of workpiece is coplanar, and flange workpiece, mold, radial electromagnetic force loading coil and axial electromagnetic force loading coil axis overlap；
Second, such as Fig. 3（a）It is shown, then axial electromagnetic force loading coil and fly-wheel diode differential concatenation add with radial electromagnetic force
Coils from parallel connection of coils is carried, capacitor power is the coil power supply connected by discharge switch；Third is closed discharge switch, capacitor power
It discharges first radial electromagnetic force loading coil, generates the pulse current of radial electromagnetic force loading coil（Fig. 3（b））, pulse electricity
Stream generates inductive loop in the flange workpiece of initial profile, and pulse current generates radial electromagnetic force with inductive loop interaction
Driving flange workpiece accelerates and deforms, and the flange workpiece of initial profile is deformed into the flange workpiece after radial electromagnetic force load, such as
Fig. 4（b）It is shown；4th, when capacitor power voltage is 0, fly-wheel diode is connected automatically, generates axial electromagnetic force loading coil
Pulse current, such as Fig. 3（b）Shown, pulse current generates inductive loop, arteries and veins in the flange workpiece after radial electromagnetic force load
It rushes electric current to accelerate and deform with inductive loop interaction generation axial magnetic power drive flange workpiece, after radial electromagnetic force load
Flange workpiece be deformed into axial electromagnetic force load after flange workpiece, such as Fig. 4（c）It is shown, complete flange processing.
Embodiment 2：
The axial electromagnetic force loading coil of circular cone solid is cut using hollow cylinder as shown in Figure 2, specific steps include：
Flange workpiece is placed in mould inside by step 1 shown in Fig. 2, and makes the side of flange is needed to be higher by compared with mould ends to turn over
Radial electromagnetic force loading coil is placed in flange inside workpiece, and ensures its upper surface and flange work by the flange height of side workpiece
The end of part flushes, and the axial electromagnetic force loading coil that hollow cylinder is cut to circular cone solid is placed in the outside of flange workpiece,
And make hollow cylinder cut circular cone solid axial electromagnetic force loading coil bottom inside radius and flange workpiece end it is total
Face, flange workpiece, mold, radial electromagnetic force loading coil and axial electromagnetic force loading coil axis overlap；Second, such as Fig. 3（a）
It is shown, hollow cylinder is cut into the axial electromagnetic force loading coil of circular cone solid and fly-wheel diode differential concatenation, then with
Radial electromagnetic force loading coil is in parallel, and capacitor power is the coil power supply connected by discharge switch；Third is closed electric discharge and opens
It closes, capacitor power first discharges to radial electromagnetic force loading coil, generates the pulse current of radial electromagnetic force loading coil, such as schemes
3（b）Shown, pulse current generates inductive loop, pulse current and inductive loop phase interaction in the flange workpiece of initial profile
Accelerated and deformed with generation radial electromagnetic force driving flange workpiece, the flange workpiece of initial profile is deformed into radial electromagnetic force load
Flange workpiece afterwards, such as Fig. 4（b）It is shown；4th, when capacitor power voltage is 0, fly-wheel diode is connected automatically, generates axis
To the pulse current of electromagnetic force loading coil, such as Fig. 3（b）It is shown, flange workpiece of the pulse current after radial electromagnetic force load
Middle generation inductive loop, pulse current accelerate and become with inductive loop interaction generation axial magnetic power drive flange workpiece
Shape, the flange workpiece after radial electromagnetic force load are deformed into the flange workpiece after axial electromagnetic force load, such as Fig. 4（c）It is shown, it is complete
At flange processing.
Claims (7)
1. a kind of pipe fitting electromagnetism hemmer of radial-axial electromagnetic force timesharing load, it is characterised in that：Including：
Radial electromagnetic force loading coil（1）, it is the flange workpiece of initial profile（31）Radial electromagnetic force is provided；
Axial electromagnetic force loading coil（2）, for the flange workpiece after radial electromagnetic force load（32）Axial electromagnetic force is provided；
Mold（4）；
With axial electromagnetic force loading coil（2）The fly-wheel diode of differential concatenation（5）；
Capacitor power（6）, it is radial electromagnetic force loading coil（1）With axial electromagnetic force loading coil（2）Energy is provided；
Flange workpiece is placed in mold（4）Inside, radial electromagnetic force loading coil（1）It is placed in flange inside workpiece, axial electromagnetic force
Loading coil（2）It is placed in the outside of flange workpiece, flange workpiece, mold（4）, radial electromagnetic force loading coil（1）, axial magnetic
Power loading coil（2）Axis overlaps；
Axial electromagnetic force loading coil（2）With fly-wheel diode（5）Differential concatenation, then with radial electromagnetic force loading coil（1）
Parallel connection, capacitor power（6）It is the coil power supply connected by discharge switch.
2. a kind of pipe fitting electromagnetism hemmer of radial-axial electromagnetic force timesharing load, feature exist according to claim 1
In：The radial electromagnetic force loading coil（1）Height be equal to flange workpiece flange height.
3. a kind of pipe fitting electromagnetism hemmer of radial-axial electromagnetic force timesharing load, feature exist according to claim 1
In：The axial electromagnetic force loading coil（2）Inner and outer diameter difference be equal to flange workpiece flange height.
4. a kind of pipe fitting electromagnetism hemmer of radial-axial electromagnetic force timesharing load, feature exist according to claim 1
In：The axial electromagnetic force loading coil（2）Interior diameter twice of flange workpiece big compared with the overall diameter of flange workpiece thickness.
5. a kind of pipe fitting electromagnetism method for flanging of radial-axial electromagnetic force timesharing load, it is characterised in that include the following steps：
First, flange workpiece is placed in mold（4）Inside, and make to need the side of flange to be higher by flange workpiece compared with mould ends
Flange height, by radial electromagnetic force loading coil（1）It is placed in flange inside workpiece, and ensures the end of its upper surface and flange workpiece
Portion flushes, by axial electromagnetic force loading coil（2）It is placed in the outside of flange workpiece, and makes axial electromagnetic force loading coil（2）'s
Bottom inside radius and the end of flange workpiece are coplanar, flange workpiece, mold（4）, radial electromagnetic force loading coil（1）And axial electricity
Magnetic force loading coil（2）Axis overlaps；
Second, by axial electromagnetic force loading coil（2）With fly-wheel diode（5）Then differential concatenation is loaded with radial electromagnetic force
Coil（1）Parallel connection, capacitor power（6）It is the coil power supply connected by discharge switch；
Third is closed discharge switch, capacitor power（6）First to radial electromagnetic force loading coil（1）Electric discharge generates radial electromagnetism
Power loading coil（1）Pulse current, pulse current generates inductive loop in the flange workpiece of initial profile, pulse current with
Inductive loop interacts, and generates radial electromagnetic force driving flange workpiece and accelerates and deform, the flange workpiece deformation of initial profile
Flange workpiece after being loaded for radial electromagnetic force；
4th, work as capacitor power（6）When voltage is 0, fly-wheel diode（5）Automatic conducting, generates axial electromagnetic force loading coil
Pulse current, pulse current generates inductive loop in the flange workpiece after radial electromagnetic force load, pulse current and induction
Vortex interaction generates axial magnetic power drive flange workpiece and accelerates and deform, and the flange workpiece after radial electromagnetic force load becomes
Shape is the flange workpiece after axial electromagnetic force load, completes flange processing.
6. a kind of pipe fitting electromagnetism method for flanging of radial-axial electromagnetic force timesharing load, feature exist according to claim 5
In：Radial electromagnetic force loading coil（1）Pulse current effective load time be first half-wave, from 0 to t1 moment；Axial electricity
Magnetic force loading coil（2）Pulse current effective load time be second half-wave, the moment from t1 to t2.
7. a kind of pipe fitting electromagnetism method for flanging of radial-axial electromagnetic force timesharing load, feature exist according to claim 5
In：Radial electromagnetic force makes flange workpiece be deformed into the flange workpiece profile after radial electromagnetic force load by initial profile；Axial electricity
Magnetic force, the flange workpiece profile after making flange workpiece be loaded by radial electromagnetic force are deformed into the flange work after axial electromagnetic force load
Part profile.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116511328A (en) * | 2017-11-08 | 2023-08-01 | 三峡大学 | Pipe fitting non-contact flanging device without arranging inside pipe fitting |
| CN108405699A (en) * | 2018-04-02 | 2018-08-17 | 三峡大学 | A kind of the plate electromagnetism hemmer and method of vertical repulsive force-radial direction suction timesharing load |
| 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 |
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| JPS6163322A (en) * | 1984-09-03 | 1986-04-01 | Agency Of Ind Science & Technol | Working method of high accuracy using electromagnetic force |
| JP2004337966A (en) * | 2003-05-19 | 2004-12-02 | Kobe Steel Ltd | Tubular member with flange and its manufacturing method |
| CN104841761A (en) * | 2015-04-24 | 2015-08-19 | 福州大学 | Alloy plate electromagnetic punching and flanging forming method and device |
| CN104874664A (en) * | 2015-04-24 | 2015-09-02 | 福州大学 | Alloy pipe fitting electromagnetic bulging and flanging synchronous forming device and method |
| CN106734568A (en) * | 2016-12-06 | 2017-05-31 | 湘潭大学 | Sheet material and pipes connecting method and device based on magnetic pulse formation |
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- 2017-06-05 CN CN201710414887.2A patent/CN107096815B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6163322A (en) * | 1984-09-03 | 1986-04-01 | Agency Of Ind Science & Technol | Working method of high accuracy using electromagnetic force |
| JP2004337966A (en) * | 2003-05-19 | 2004-12-02 | Kobe Steel Ltd | Tubular member with flange and its manufacturing method |
| CN104841761A (en) * | 2015-04-24 | 2015-08-19 | 福州大学 | Alloy plate electromagnetic punching and flanging forming method and device |
| CN104874664A (en) * | 2015-04-24 | 2015-09-02 | 福州大学 | Alloy pipe fitting electromagnetic bulging and flanging synchronous forming device and method |
| CN106734568A (en) * | 2016-12-06 | 2017-05-31 | 湘潭大学 | Sheet material and pipes connecting method and device based on magnetic pulse formation |
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