CN206925192U - A kind of electromagnetic forming device of metal tube - Google Patents
A kind of electromagnetic forming device of metal tube Download PDFInfo
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- CN206925192U CN206925192U CN201720206041.5U CN201720206041U CN206925192U CN 206925192 U CN206925192 U CN 206925192U CN 201720206041 U CN201720206041 U CN 201720206041U CN 206925192 U CN206925192 U CN 206925192U
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- magnetic field
- metal tube
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- background magnetic
- coil
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Abstract
The utility model discloses a kind of electromagnetic forming device of metal tube, the device includes：Background magnetic field unit, pulse background magnetic field is produced on metal tube, shape driving coil, pulsed drive magnetic field is produced on metal tube, pulsed drive magnetic field can produce vortex on metal tube.Because the pulse width in pulsed drive magnetic field is far smaller than the pulse width of pulse background magnetic field, pulse background magnetic field caused vortex on metal tube is ignored, pulsed drive magnetic field is caused to influence to ignore on magnetic field on metal tube simultaneously, therefore, by pulse background magnetic field and vortex interaction, electromagnetic force is produced on metal tube.Increase electromagnetic force can be realized by individually adjusting pulse background magnetic field and pulsed drive magnetic field, realizes the metal tube shaping of high mechanical properties and low conductivity, while the design difficulty of shaping driving coil can be reduced, extends the life-span of shaping driving coil.
Description
Technical field
The utility model belongs to metal tube molding field, is filled more particularly, to a kind of electro-magnetic forming of metal tube
Put.
Background technology
Electro-magnetic forming is a kind of high-duty, the high-speed special type for carrying out plastic working to metal stock using pulse-electromagnetic force
Processing method, there is high-speed, non-contacting feature, the forming limit of high intensity difficulty moulding material can be greatly improved, simplify mould
Tool manufacture, technological flexibility and flexibility are high, and machining accuracy is high, residual stress and resilience are small, easily realizes energy hole and production
Automation.Compared with conventional manufacturing process, electromagnetic forming technique has following major advantage：1st, mould is simple, and reduction is produced into
This；2nd, element precision is high, and surface quality is good；3rd, material plasticity deformability can be improved, improves forming limit.Therefore, electromagnetism
Shaping has been used for multiclass metal tube and shaped.
A kind of radial direction and axially loaded formula metal tube electromagnetic forming method are disclosed in patent document CN103406418A
And device.But subject matter existing for existing metal tube electromagnetic forming method has：(1) electro-magnetic forming power supply is maximum at present
Capacity is commonly less than 500kJ or so, and IGCT used pressure-resistant can be generally 25kV, and long-term use can bear the electricity of tens kilo-amperes
Stream, such as further will improve crystallized ability, it is necessary to which the power supply of bigger energy, performance more switching device, this will expend huge
Investment and Project Realization difficulty it is higher, therefore electro-magnetic forming is only applicable to the gold that conducts electricity very well, mechanical strength is relatively low at present
Belong to (such as copper, aluminium alloy), and the pipe thickness of metal tube is generally less than 3mm；(2) coil is relatively fixed with pipe fitting position, pipe
When part bulging or undergauge, in order to produce corresponding electromagnetic force, it is necessary to change the relative position between coil and workpiece；(3) for pipe
For part bulging, form-wound coil must be placed in metal tube in traditional method, by being passed through pulse heavy current to coil,
Vortex is induced in metal tube, this vortex forms radially outer electromagnetic force with magnetic field interaction caused by coil current,
So as to reach metal tube bulging purpose, belong to the metal tube electro-magnetic forming based on electromagnetic repulsive force.However, work as pipe fitting internal diameter
During very little, this pipe fitting bulging such as made using traditional electromagnetic forming method, according to multiple subcoil coilings, eddy current coil
Diameter will be very small, cause coil winding difficult；And according to a subcoil as eddy current coil, because coil can bear
Finite energy, it is difficult to make pipe fitting bulging.
Utility model content
The defects of for prior art, the utility model provide a kind of electromagnetic forming device of metal tube, its purpose
It is to produce radially outer electromagnetic force inside metal tube by background magnetic field unit and shaping driving coil, thus solves
High mechanical properties, low conductivity and wall thickness it is big metal tube shaping and slim pipe diameter metal tube shaping.
To achieve the above object, the utility model provides a kind of electromagnetic forming device of metal tube, including：
Background magnetic field unit, the pulse background magnetic field along metal tube axial direction is formed on metal tube；
Driving coil is shaped, is formed when being passed through the first pulse current on metal tube along the axial pulse of metal tube
Driving magnetic field, vortex is produced on metal tube by pulsed drive magnetic field；The pulse width of pulse background magnetic field is far longer than arteries and veins
Rush the pulse width of driving magnetic field；
And electromagnetic force is formed on metal tube by pulse background magnetic field and vortex interaction, metal tube is allowed by electromagnetic force
Part dilatancy.
Pulse background magnetic field is produced on metal tube by background magnetic field unit, by shaping driving coil simultaneously in metal tube
Pulsed drive magnetic field is produced on part tube wall, because the pulse width in pulsed drive magnetic field is far smaller than the pulse of pulse background magnetic field
Width, pulse background magnetic field caused vortex on metal tube is negligible, while causes pulsed drive magnetic field in metal
Magnetic field on pipe fitting can be ignored, by pulse background magnetic field with shaping vortex interaction caused by driving coil,
Form electromagnetic force on metal tube, electromagnetic force allows metal tube dilatancy, due to can be by individually increasing pulse background magnetic
Field intensity, or by significantly increasing pulse background magnetic field intensity while reducing change strength of vortex, realize increase electromagnetic force, make metal
Tubular expansion deforms, it is possible to achieve high mechanical properties, the bulging of low conductivity pipe fitting, can also reduce electricity in shaping driving coil
Compressive Strength and stress intensity.
Further, background magnetic field unit is the coil for being connected with the second pulse current, and coil is in hollow column；Shaping driving
Coil is in hollow column；Background magnetic field unit is placed on outside shaping dies, and shaping driving coil is located inside metal tube；And the
The direction for being passed through shaping driving coil of one pulse current is passed through the in opposite direction of background magnetic field coil with the second pulse current.
Further, background magnetic field unit is the coil for being connected with the second pulse current, and coil is in hollow column；Shaping driving
Coil is in hollow column；Background magnetic field unit is located at shaping dies positioned at the outside of shaping driving coil, shaping driving coil
Outside, and the direction and the second pulse current that are passed through shaping driving coil of the first pulse current is passed through background magnetic field coil
In the opposite direction.
Further, the triggering moment in pulsed drive magnetic field is located at the peak value moment of pulse background magnetic field.
Further, the pulsewidth of pulse background magnetic field is more than 10ms, and the pulsewidth in pulsed drive magnetic field is less than 1ms.
The size of vortex depends on the rate of change in magnetic field, and the small pulsed magnetic field rate of change of pulsewidth is big, therefore inductive loop
Greatly；The size of magnetic field intensity depends on equivalent current size, therefore, when the pulsewidth of pulse background magnetic field is more than 10ms, and pulse
The pulsewidth of driving magnetic field is less than 1ms, and relative to vortex caused by pulsed drive magnetic field, vortex can as caused by pulse background magnetic field
To ignore, relative to pulse background magnetic field on metal tube caused magnetic field, pulsed drive magnetic field is on metal tube
Caused magnetic field can be ignored.
By the contemplated above technical scheme of the utility model, compared with prior art, due to introducing background magnetic field
Unit, following beneficial effect can be obtained:
(1) by introducing the pulse background magnetic field of long pulsewidth or stable state, and by pulse background magnetic field and pulsed drive is passed through
Magnetic field and it is caused vortex collective effect produce electromagnetic force, by increase pulse background magnetic field intensity or increase pulse background magnetic
Field intensity reduces the intensity that driving form-wound coil produces vortex simultaneously, can effective electromagnetism of the lifting workpieces in deformation process
Power, so as to which the metal that electric conductivity is poor, thickness is larger and intensity is higher is formed；Also shaping drives line can be reduced
Discharge voltage, electric current and the stress born needed for circle are horizontal, simplify the structure design of shaping driving coil, improve shaping
The service life of coil.
(2) by the way that background magnetic field coil and shaping driving coil to be placed in the outside of metal tube, by background magnetic field unit
Background magnetic field is provided, shaping driving coil produces vortex on metal tube tube wall, by using two sets of independent power-supply systems,
Can by adjust respective voltage swing and apply direction come change the relative size of pulse background magnetic field and pulsed drive magnetic field and
Direction, the relative size and direction for changing magnetic field and vortex on metal tube are realized, for the metal tube in pipe with small pipe diameter and shaping
Attraction is produced between driving coil and provides effective way, is shaped available for the metal tube aspiration-type for realizing pipe with small pipe diameter.
Brief description of the drawings
Fig. 1 is the structural representation of the first embodiment of the electromagnetic forming device of metal tube provided by the utility model；
Fig. 2 be metal tube provided by the utility model electromagnetic forming device first embodiment in metal tube magnetic
The schematic diagram of field, vortex and electromagnetism force direction；
Fig. 3 is background magnetic field coil in the first embodiment of the electromagnetic forming device of metal tube provided by the utility model
With axial magnetic field (central area) time cooperation schematic diagram of shaping driving coil；
Fig. 4 is the structural representation of the second embodiment of the electromagnetic forming device of metal tube provided by the utility model；
Fig. 5 be metal tube provided by the utility model electromagnetic forming device second embodiment in metal tube magnetic
The schematic diagram of field, vortex and electromagnetism force direction；
In all of the figs, identical reference is used for representing identical element or structure, wherein：1- shapes drives line
Circle, 2- background magnetic field coils, 3- shaping dies, 4- metal tubes, 5- second source units, the electric capacity of 7- first, 8- first switches,
The fly-wheel diodes of 9- first, the second electric capacity of 6- the first power subsystem 10-, 11- second switches, the fly-wheel diodes of 12- second.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only explaining
The utility model, it is not used to limit the utility model.
First embodiment
Fig. 1 is the structural representation of the first embodiment of the electromagnetic forming device of metal tube provided by the utility model,
Electromagnetic forming device is used to be made up of multiple tube electro-magnetic forming, multiple tube metal tube 4 and shaping dies 3.Metal tube 4 is
Corronil seamless pipe, its conductance and moulding difference, the internal diameter of metal tube is 46.6mm, wall thickness 4.2mm.Shaping dies 3
For seamless steel pipe, the internal diameter of shaping dies is 57.8, wall thickness 2.6mm.Shaping dies 3 is placed on the outside of metal tube 4, shaping
Mould 3 is used to constrain the shape in the forming process of metal tube 4, metal tube 4 is brought into close contact with shaping dies 3, makes
Into multiple tube, compound tube outer surface is steel pipe, and compound pipe internal surface is Copper-nickel alloy tube.
Electromagnetic forming device includes shaping driving coil 1, in hollow column, inside metal tube 4；Background magnetic field line
Circle 2 is in hollow column, outside shaping dies 3.Shaping driving coil 1 is accessed by the first electric capacity 7, first switch 8 and the
First power subsystem 5 of one fly-wheel diode 9 composition, the first electric capacity 7 is in parallel with the first fly-wheel diode 9, shapes driving coil 1
In parallel with the first fly-wheel diode 9, first switch 8 is connected between the first electric capacity 7 and the first fly-wheel diode, passes through closure first
Switch 8 makes to carry out discharge and recharge between the first electric capacity 7 and shaping driving coil 1, allows shape that the first alternation electricity is passed through in driving coil 1
Stream, first alternating current waveform is adjusted as the first constant pulse current of direction by the first fly-wheel diode 9；Due to logical
Enter the first pulse current, shaping driving coil 2 produces the pulsed drive magnetic field along metal tube axial direction on metal tube 4, is
The pulsed drive magnetic field that pulse width is less than 1ms is obtained, shapes the inductance selection of driving coil 1 in tens microhenry levels, first
The capacitance selection of electric capacity 7 is hundreds of microfarad ranges, can so make to sense bigger vortex in metal tube 4, whirlpool in the present embodiment
Intensity of flow up to 250kA.
Background magnetic field coil 2 is accessed into second source unit, second source unit is by the second electric capacity 10, the and of second switch 11
Second fly-wheel diode 12 forms, and the structure of second source unit is identical with the first power subsystem structure, and background magnetic field coil 2 connects
It is different from the direction for shaping the first power subsystem of access of driving coil 1 to enter second source cell orientation, causes background magnetic field coil 2
The second pulse current direction being passed through is different from the first pulse current direction that shaping driving coil 1 is passed through, due to being passed through
Second pulse current, background magnetic field coil 2 produce the pulse background magnetic field along metal tube axial direction on metal tube 4, in order to
The pulse background magnetic field that pulse width is more than 10ms is obtained, the inductance of background magnetic field coil 2 is several milihenries, and the second electric capacity 10 is several
Millifarad, the reversely vortex that can avoid in metal tube being sensed by pulse background magnetic field is excessive and offsets by shaping driving coil
Caused vortex, while pulse width is more than the ability that 10ms can improve magnetic field penetration shaping dies 3 so that metal tube 4
Axial pulse background magnetic field it is bigger, the intensity of pulse background magnetic field is 5T in the present embodiment.
As shown in Fig. 2 the second pulse current direction being passed through in background magnetic field coil 2 in shaping driving coil 1 with being passed through
The first pulse current it is in opposite direction, and due to metal tube 4 positioned at shaping driving coil 4 and background magnetic field coil 2 between, gold
The pulse background magnetic field direction for belonging to tube wall is consistent with caused pulsed drive magnetic direction on metal pipe-wall.And due to the second pulse
Electric current pulsewidth is more than 10ms, and the first pulse current width is less than 1ms so that pulse background magnetic field intensity is much larger than pulsed drive magnetic
, the influence to magnetic field intensity in pulsed drive magnetic field can be ignored.Similarly, it is vortexed and is much larger than as caused by pulsed drive magnetic field
It is vortexed caused by pulse background magnetic field, the shadow being vortexed as caused by pulse background magnetic field to being vortexed on metal tube can be ignored
Ring.Pulse background magnetic field and shaping driving coil produce vortex interaction on metal tube, produce away from metal tube center
Electromagnetic force, realize metal tube to shaping dies be bonded.
By background magnetic field coil 2 provide pulse background magnetic field and by shaping driving coil 1 provide vortex between act on produce
Electromagnetic force.Realize pulse background magnetic field and vortex between decoupling, can by only increase pulse background magnetic field intensity without
Increase the effect that strength of vortex realizes increase electromagnetic force, it might even be possible to reduce strength of vortex and greatly improve pulse background intensity
Realize the effect of increase electromagnetic force.Realize and the metal tube of high mechanical strength, electric conductivity difference is shaped, improve shaping driving
The service life and design complexities of coil.
When the triggering moment of the first pulse current is located at the peak value moment of the second pulse current, shaping driving coil 1 with
The axial magnetic field time cooperation of background magnetic field coil 2 is as shown in Figure 3.The magnetic direction shown in Fig. 3 is with respective hub of a spool
The magnetic direction in region is as a reference point, therefore two coils are opposite in magnetic direction caused by central area.The axial magnetic
Under the time cooperation of field, pulse background magnetic field intensity is most strong, and pulsed drive rate of change of magnetic is high, and caused strength of vortex is big, electricity
Magnetic force is maximum.
Above-mentioned background magnetic field coil 2 could alternatively be permanent magnet, electromagnet or water cooling magnet, permanent magnet, electromagnet or water
Cold magnet provides constant background magnetic field for metal tube, by eddy current effect in constant background magnetic field and metal tube, produces electromagnetism
Power, realize metal tube bulging.
Second embodiment
Fig. 4 is the structural representation of the second embodiment of the electromagnetic forming device of metal tube provided by the utility model,
Electromagnetic forming device is used to metal tube 4 being machined to the cavity shape of shaping dies 3, and metal tube 4 is located in shaping dies 3
Portion.Electromagnetic forming device includes background magnetic field coil 2 and shaping driving coil 1, shaping driving coil 1 and background magnetic field coil 2
It is in hollow column, background magnetic field coil 2 is placed on outside shaping driving coil 1, and shaping driving coil 1 is placed on outside shaping dies 3
Portion, fixed by upper and lower end parts fixture 13, make metal tube 4, shaping dies 3, shaping driving coil 1 and background magnetic field coil
2 is coaxial.First pulse current of the pulse period less than 1ms is passed through in shaping driving coil 1, arteries and veins is passed through in background magnetic field coil 2
The cycle is rushed as the second pulse current more than 10ms, and the direction for being passed through shaping driving coil of the first pulse current and the second arteries and veins
That rushes electric current is passed through the in opposite direction of background magnetic field coil.
As shown in figure 5, due to the direction for being passed through shaping driving coil of the first pulse current and leading to for the second pulse current
Enter the in opposite direction of background magnetic field coil, and shaping driving coil and background magnetic field coil are respectively positioned on the outside of shaping dies,
Therefore shape the caused pulse background magnetic field on metal tube tube wall of driving coil 1 and by background magnetic field coil in pipe to be formed
Caused pulsed drive magnetic direction on wall determines metal on the contrary, identical with principle in first embodiment by pulse background magnetic field
Magnetic field intensity in pipe fitting, by shaping driving coil, caused vortex determines strength of vortex in metal tube in metal tube.Gold
Belong to pulse background magnetic field and shaping driving coil on pipe fitting and produce vortex interaction, produce the electromagnetism away from metal tube center
Power, realize that metal tube is machined to shaping dies cavity shape.
In second embodiment provided by the utility model, because shaping driving coil and background magnetic field coil are respectively positioned on gold
Belong to outside pipe fitting, and metal tube dilatancy can be made, avoid to shape driving coil in the prior art as metal tube
Inside, the minimum diameter of metal tube dilatancy is limited, the shaping of the caliber to be formed of small internal diameter can be realized.
As it will be easily appreciated by one skilled in the art that preferred embodiment of the present utility model is the foregoing is only, not
To limit the utility model, any modification of all made within spirit of the present utility model and principle, equivalent substitution and change
Enter, should be included within the scope of protection of the utility model.
Claims (5)
1. a kind of electromagnetic forming device of metal tube, metal tube is machined to the shape of shaping dies, the metal tube
It is placed on inside shaping dies, it is characterised in that including：
Background magnetic field unit (2), the pulse background magnetic field along metal tube axial direction is formed on the metal tube；
Driving coil (1) is shaped, is formed when being passed through the first pulse current on metal tube along metal tube axial direction
Pulsed drive magnetic field, vortex is produced on metal tube by pulsed drive magnetic field；The pulse width of the pulse background magnetic field is remote
Much larger than the pulse width in pulsed drive magnetic field；
And forming electromagnetic force on metal tube by the pulse background magnetic field and the vortex interaction, electromagnetic force allows metal
Tubular expansion deforms.
2. electromagnetic forming device according to claim 1, it is characterised in that the background magnetic field unit is to be connected with the second arteries and veins
The coil of electric current is rushed, coil is in hollow column；The shaping driving coil is in hollow column；The background magnetic field unit is placed on institute
State outside shaping dies, the shaping driving coil is located inside the metal tube；And first pulse current be passed through shaping
The direction of driving coil is passed through the in opposite direction of background magnetic field coil with the second pulse current.
3. electromagnetic forming device according to claim 1, it is characterised in that the background magnetic field unit is to be connected with the second arteries and veins
The coil of electric current is rushed, coil is in hollow column；The background magnetic field unit drives positioned at the outside of shaping driving coil, the shaping
Moving winding is located at the outside of shaping dies, and the direction for being passed through shaping driving coil of the first pulse current and the second pulse current
Be passed through the in opposite direction of background magnetic field coil.
4. according to the electromagnetic forming device described in any one of claims 1 to 3, it is characterised in that the pulsed drive magnetic field
Triggering moment is located at the peak value moment of the pulse background magnetic field.
5. according to the electromagnetic forming device described in any one of claims 1 to 3, it is characterised in that the pulse background magnetic field
Pulsewidth is more than 10ms；And the pulsewidth in the pulsed drive magnetic field is less than 1ms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720206041.5U CN206925192U (en) | 2017-03-06 | 2017-03-06 | A kind of electromagnetic forming device of metal tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720206041.5U CN206925192U (en) | 2017-03-06 | 2017-03-06 | A kind of electromagnetic forming device of metal tube |
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| Publication Number | Publication Date |
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| CN206925192U true CN206925192U (en) | 2018-01-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201720206041.5U Withdrawn - After Issue CN206925192U (en) | 2017-03-06 | 2017-03-06 | A kind of electromagnetic forming device of metal tube |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106694681A (en) * | 2017-03-06 | 2017-05-24 | 华中科技大学 | Electromagnetic forming device and method of metal pipe |
| CN108421874A (en) * | 2018-05-25 | 2018-08-21 | 福州大学 | A kind of variable cross-section metal pipe material Electromagnetic bulging device and method |
| CN109946181A (en) * | 2019-03-18 | 2019-06-28 | 三峡大学 | It is a kind of for testing the device and method of metallic welded tubes part connector impact strength |
| CN111468586A (en) * | 2020-04-13 | 2020-07-31 | 三峡大学 | Electromagnetic bulging device and method for pipe fitting based on concave coil group |
| CN111855432A (en) * | 2020-07-20 | 2020-10-30 | 华中科技大学 | Device and method for testing stress-strain curve of titanium alloy material under high-temperature high-strain rate |
| CN112792201A (en) * | 2020-12-14 | 2021-05-14 | 三峡大学 | Multi-size pipe fitting electromagnetic bulging device and method based on combined coil |
-
2017
- 2017-03-06 CN CN201720206041.5U patent/CN206925192U/en not_active Withdrawn - After Issue
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106694681A (en) * | 2017-03-06 | 2017-05-24 | 华中科技大学 | Electromagnetic forming device and method of metal pipe |
| CN108421874A (en) * | 2018-05-25 | 2018-08-21 | 福州大学 | A kind of variable cross-section metal pipe material Electromagnetic bulging device and method |
| CN108421874B (en) * | 2018-05-25 | 2024-03-29 | 福州大学 | Electromagnetic bulging device and method for variable-section metal pipe |
| CN109946181A (en) * | 2019-03-18 | 2019-06-28 | 三峡大学 | It is a kind of for testing the device and method of metallic welded tubes part connector impact strength |
| CN111468586A (en) * | 2020-04-13 | 2020-07-31 | 三峡大学 | Electromagnetic bulging device and method for pipe fitting based on concave coil group |
| CN111468586B (en) * | 2020-04-13 | 2022-04-08 | 三峡大学 | Electromagnetic bulging device and method for pipe fitting based on concave coil group |
| CN111855432A (en) * | 2020-07-20 | 2020-10-30 | 华中科技大学 | Device and method for testing stress-strain curve of titanium alloy material under high-temperature high-strain rate |
| CN112792201A (en) * | 2020-12-14 | 2021-05-14 | 三峡大学 | Multi-size pipe fitting electromagnetic bulging device and method based on combined coil |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
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Granted publication date: 20180126 Effective date of abandoning: 20190305 |