CN107138590B - A kind of device and method using the driving plate hole flanging forming of multidirectional magnetic field force - Google Patents
A kind of device and method using the driving plate hole flanging forming of multidirectional magnetic field force Download PDFInfo
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- CN107138590B CN107138590B CN201710462714.8A CN201710462714A CN107138590B CN 107138590 B CN107138590 B CN 107138590B CN 201710462714 A CN201710462714 A CN 201710462714A CN 107138590 B CN107138590 B CN 107138590B
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- hole flanging
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Classifications
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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
-
- 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
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
Abstract
The invention discloses a kind of device and methods using the driving plate hole flanging forming of multidirectional magnetic field force, the device includes blank holder (1) and cavity plate (2), the blank holder (1) is placed in the top of cavity plate (2), blank holder (1) is for the plate (3) shaped to hole flanging to be pressed between blank holder (1) and cavity plate (2), there are matrix cavity (4) in the cavity plate (2), upper coil groove and lower coil groove are relatively set on the blank holder (1) and respectively on cavity plate (2), upper end undergauge coil (5) is embedded in the upper coil groove, lower end undergauge coil (6) is embedded in the lower coil groove, axial drawing coil (7) is equipped with above the edge of the pre-manufactured hole of the plate (3), internal bulging coil (8) is equipped in the pre-manufactured hole of plate (3).When the device and method can avoid hole flanging forming circular cross-esction deformed area crack, good product quality, forming technology it is simple.
Description
Technical field
The present invention relates to materials to shape technical field, and in particular to a kind of to drive plate hole flanging using multidirectional magnetic field force
The device and method of forming.
Background technique
Traditional hole flanging formation method is directly to use punching block hole flanging, and this method needs a set of large-scale forming with punch-die
Tooling and big bed press, high production cost, period are long.When hole flanging coefficient is smaller, circular cross-esction deformed area is easy to produce
Crackle, it usually needs multi-step forming process, to be polished among process, deburring and annealing, manufacturing process it is quite multiple
Miscellaneous, until keeping production efficiency low, high rejection rate is at high cost, and labor intensity of workers is big.
Electromagnetic pulse forming is a kind of method for carrying out High-speed machining to metal works using pulse magnet field force, is the following system
Make one of the key technology of industry.Research shows that: material can obtain under the conditions of pulse magnet field force high-speed deformation is higher than tradition punching
Forming property under pressure processing.
In pertinent literature, Zhang Wenzhong et al. has studied 5A06 plate magnetic pulse formation circular cross-esction technique, finds electromagnetism
Forming can improve the plasticity and circular cross-esction performance of aluminium alloy significantly.Huang Liang et al. discovery is by reducing pressure-pad-force, favorably
It is flowed in plate flange section material into matrix cavity, being thinned for hole flanging end can be inhibited.But pressure-pad-force it is smaller when, plate
Flange wrinkles.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the shortcomings of to mention in background above technology and defect, provide one
When the forming of kind of avoidable hole flanging circular cross-esction deformed area crack, good product quality, the simple plate hole flanging of forming technology at
The device and method of shape.
In order to solve the above technical problems, technical solution proposed by the present invention are as follows:
The basic fundamental design of the technical solution to solve the above problems the invention proposes two kinds, both schemes is identical.
The first scheme are as follows: a kind of device using the driving plate hole flanging forming of multidirectional magnetic field force, including blank holder and recessed
Mould, the blank holder are placed in the top of cavity plate, blank holder be used to for the plate shaped to hole flanging being pressed in blank holder and cavity plate it
Between, there is in the cavity plate matrix cavity, be relatively set with upper coil groove and lower part respectively on the blank holder and on cavity plate
Coil recess is embedded with upper end undergauge coil in the upper coil groove, is embedded with lower end in the lower coil groove
Portion's undergauge coil, the edge top of the pre-manufactured hole of the plate are equipped with axial drawing coil, are equipped in the pre-manufactured hole of plate internal
Bulging coil.
Preferably, the upper end undergauge coil, lower end undergauge coil, axial drawing coil and internal bulging coil connect
It is connected to the same power-supply system, while carrying out charge or discharge.It is controlled in this way, can facilitate.
Preferably, the internal bulging coil includes vertically arranged multi-turn coil.
Preferably, the upper end undergauge coil and lower end undergauge coil include multiple concentric coil.
Preferably, the axial drawing coil includes multiple concentric coil.
As a general technical idea, another aspect of the present invention provide it is a kind of using above-mentioned device to plate carry out
The method of hole flanging forming, this method mainly comprise the steps that
S1, by the board clamp with pre-manufactured hole to hole flanging forming between blank holder and cavity plate so that axial drawing line
Circle is located above the prefabricated bore edges of plate, and internal bulging coil is located in the pre-manufactured hole of plate；
S2, it to axial drawing coil, upper end undergauge coil, lower end undergauge coil and internal bulging coil charges and puts
Electricity, upper end undergauge coil and lower end undergauge coil generate the electromagnetic force being inwardly compressed to plate, and internal bulging coil is to pre-
The electromagnetic force expanded outward is generated at drilling, axial drawing coil generates the electromagnetic force being pressed downward to plate, and plate is in multidirectional magnetic
Downward deep-drawing deformation under the driving of field force, i.e. the hole flanging forming of completion plate.
Axial drawing coil drive plate hole flanging region (moves downward, as shown in Figure 1) axially movable；Internal bulging line
It encloses and generates a radial compressive stress (as shown in Figure 2) for the nose end in plate, according to Principles of Plastic Molding it is found that radial force
(σ3) appearance tensile stress numerical value for being subject to when will necessarily reduce nose end deformation, to inhibit to rupture.End diameter reducing coil is used for
It drives the material of plate flange region to flow to matrix cavity, further decreases tensile stress numerical value (such as Fig. 3 being subject to when nose end deformation
It is shown)；To fundamentally solve the problems, such as that nose end is easy drawing crack when plate hole flanging, is greatly improved hole flanging height.
Second scheme are as follows: a kind of device using the driving plate hole flanging forming of multidirectional magnetic field force, including blank holder and recessed
Mould, the blank holder are placed in the top of cavity plate, blank holder be used to for the plate shaped to hole flanging being pressed in blank holder and cavity plate it
Between, there is in the cavity plate matrix cavity, be relatively set with upper coil groove and lower part respectively on the blank holder and on cavity plate
Coil recess is embedded with upper end undergauge coil in the upper coil groove, is embedded with lower end in the lower coil groove
Portion's undergauge coil, the edge top of the pre-manufactured hole of the plate are equipped with axial drawing coil, are equipped in the pre-manufactured hole of plate internal
Bulging coil.The cavity plate is placed on a bottom plate, and the circumferential direction on the bottom plate along matrix cavity is equipped with more springs, described in more
Spring is arranged vertically upwards, and the upper end of more springs is equipped with a ring baffle.
Preferably, the axial drawing coil and internal bulging coil respectively connect a power-supply system, it is described on
End diameter reducing coil connects a power-supply system, end diameter reducing coil and axial drawing coil, inside with lower end undergauge coil
Bulging coil independently carries out charge or discharge.In this way, the discharge time of internal bulging coil can be longer, it can be in the pre- of plate
Lasting magnetic pressure is generated at drilling.
Preferably, the internal bulging coil includes vertically arranged multi-turn coil.
Preferably, the upper end undergauge coil and lower end undergauge coil include multiple concentric coil.
Preferably, the axial drawing coil includes multiple concentric coil.
As a general technical idea, another aspect of the present invention provide it is a kind of using above-mentioned device to plate carry out
The method of hole flanging forming, this method mainly comprise the steps that
S1, by the board clamp with pre-manufactured hole to hole flanging forming between blank holder and cavity plate so that axial drawing line
Circle is located above the prefabricated bore edges of plate, and internal bulging coil is located in the pre-manufactured hole of plate, and ring baffle is against pre-manufactured hole
Edge below；
S2, it to axial drawing coil, upper end undergauge coil, lower end undergauge coil and internal bulging coil charges and puts
Electricity, upper end undergauge coil and lower end undergauge coil generate the electromagnetic force being inwardly compressed to plate, and internal bulging coil is to pre-
The electromagnetic force expanded outward is generated at drilling, axial drawing coil generates the electromagnetic force being pressed downward to plate, and plate is in multidirectional magnetic
Downward deep-drawing deformation under the driving of field force, in the downward drawing deformation process of plate, ring baffle moves down under stress, in advance
The edge of drilling keeps straight on ring baffle；
S3, to axial drawing coil, upper end undergauge coil, lower end undergauge coil and internal bulging coil blackout, go
Except internal bulging coil, spring and ring baffle, axial drawing coil is dropped to the straight place of prefabricated bore edges, to axial drawing
Deep coil, upper end undergauge coil and lower end undergauge coil discharge again, make the prefabricated bore edges of plate and the inner wall of cavity plate
Mold, i.e. the hole flanging forming of completion plate.
Benefit using this scheme is: after first step hole flanging, the aperture in the middle part of plate becomes larger, sheet material base
Annular region (straight portions of prefabricated bore edges) reduces；Remaining fraction annular region is only bent and draws by second step hole flanging
Directly, in this way, being conducive to improve the mold of flange straight wall and cavity plate.
Compared with the prior art, the advantages of the present invention are as follows:
(1) upper end undergauge coil and lower end undergauge coil are set, the plasticity of plate flange portion material is helped to improve
Mobility reduces the tensile stress that plate nose end is subject to when hole flanging deforms, and avoids because of rupture caused by drawing gravitation is excessive, thus
Improve the hole flanging height of plate.
(2) internal bulging coil, which is arranged, to generate magnetic pressure in plate pre-manufactured hole, this magnetic pressure can produce at pre-manufactured hole
The unidirectional tensile stress state of traditional hole flanging is changed into the stress state of a drawing, a pressure by raw radial compressive stress.According to plasticity at
Shape principle, the appearance of compression, the tensile stress numerical value for inevitably resulting in nose end reduce, to further avoid nose end because of pull
It is ruptured caused by power is excessive, to further increase hole flanging height.
(3) present invention is using upper end undergauge coil, lower end undergauge coil, axial drawing coil and internal bulging coil
Discharge simultaneously, multidirectional magnetic field impulse carried out to plate and drives plate pre-manufactured hole hole flanging high-speed deformation, when reducing nose end deformation by
Tensile stress numerical value, avoid circular cross-esction deformed area from cracking, improve the flange performance of plate, improve product quality.
(4) in second scheme of the invention, after first step hole flanging, the aperture in the middle part of plate becomes larger, plate bottom
The annular region (straight portions of prefabricated bore edges) in portion reduces；In second step hole flanging, only by remaining fraction annulus
Domain bending is straightened, in this way, being conducive to improve the mold of flange straight wall and cavity plate.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is the present invention
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is the stress state schematic diagram that axial drawing coil acts on lower plate nose end.
Fig. 2 is the stress state schematic diagram of plate nose end under axial drawing coil and internal bulging coil collective effect.
Fig. 3 is axial drawing coil, internal bulging coil, upper end undergauge coil and lower end undergauge coil collective effect
The stress state schematic diagram of lower plate nose end.
Fig. 4 is the structural schematic diagram of the device work original state of the embodiment of the present invention 1.
Fig. 5 is sheet deformation schematic diagram after the device coil of the embodiment of the present invention 1 discharges simultaneously.
Fig. 6 is the structural schematic diagram of the device work original state of the embodiment of the present invention 2.
Fig. 7 is sheet deformation schematic diagram after the device coil of the embodiment of the present invention 2 discharges simultaneously.
Fig. 8 is that the device axial direction drawing coil of the embodiment of the present invention 2 declines, ring baffle, spring and internal bulging coil
Schematic diagram after removal.
Sheet deformation is illustrated after Fig. 9 discharges again for the device axial direction drawing and end diameter reducing coil of the embodiment of the present invention 2
Figure.
Marginal data:
1, blank holder；2, cavity plate；3, plate；4, matrix cavity；5, upper end undergauge coil；6, lower end undergauge coil；7,
Axial drawing coil；8, internal bulging coil；9, bottom plate；10, spring；11, ring baffle.
Specific embodiment
To facilitate the understanding of the present invention, the present invention is made below in conjunction with Figure of description and preferred embodiment more complete
Face meticulously describes, but the protection scope of the present invention is not limited to the following specific embodiments.
It should be strongly noted that when to be described as " be fixed on, be fixed in, be connected to or be connected to " another for a certain element
When on element, it can be directly fixed, affixed, connection or is connected on another element, be also possible to by connecting among other
Fitting is indirectly fixed, affixed, connects or is connected on another element.
Unless otherwise defined, all technical terms used hereinafter and the normally understood meaning of those skilled in the art
It is identical.Technical term used herein is intended merely to the purpose of description specific embodiment, is not intended to the limitation present invention
Protection scope.
Embodiment 1:
As shown in Figure 4 and Figure 5, a kind of device of the invention using the driving plate hole flanging forming of multidirectional magnetic field force, the dress
It sets including blank holder 1 and cavity plate 2, blank holder 1 is placed in the top of cavity plate 2.Plate of the blank holder 1 for will be shaped to hole flanging
3 are pressed between blank holder 1 and cavity plate 2.There is matrix cavity 4 in cavity plate 2.It is relatively set on blank holder 1 and respectively on cavity plate 2
Portion's coil recess and lower coil groove are embedded with upper end undergauge coil 5, in lower coil groove in upper coil groove
Inside it is embedded with lower end undergauge coil 6.It is provided with pre-manufactured hole on plate 3, axial drawing is equipped with above the edge of the pre-manufactured hole of plate 3
Coil 7, the pre-manufactured hole of plate 3 is interior to be equipped with internal bulging coil 8.The inside bulging coil 8 includes vertically arranged multi-turn coil.
And upper end undergauge coil 5 and lower end undergauge coil 6 are multiple concentric coil.Axial drawing coil 7 is also multiple concentric
Coil.Upper end undergauge coil 5, lower end undergauge coil 6, axial drawing coil 7 and internal bulging coil 8 are connected to same
Power-supply system, while carrying out charge or discharge.
Hole flanging forming is carried out to plate using above-mentioned apparatus, the specific steps are as follows:
The plate 3 to hole flanging forming with pre-manufactured hole is clipped between blank holder 1 and cavity plate 2 by the first step, so that axial
Drawing coil 7 is located above the prefabricated bore edges of plate 3, and internal bulging coil 8 is located in the pre-manufactured hole of plate 3；
Second step, to axial drawing coil 7, upper end undergauge coil 5, lower end undergauge coil 6 and internal bulging coil 8
Charged and discharged, upper end undergauge coil 5 and lower end undergauge coil 6 generate the electromagnetic force being inwardly compressed to plate 3, internal swollen
Shape coil 8 generates the electromagnetic force being pressed downward to plate 3 to the electromagnetic force expanded outward, axial drawing coil 7 is generated at pre-manufactured hole,
The downward deep-drawing deformation under the driving of multidirectional magnetic field force of plate 3, i.e. the hole flanging forming of completion plate 3.
Embodiment 2:
As shown in Figures 6 to 9, a kind of device of the invention using the driving plate hole flanging forming of multidirectional magnetic field force, the dress
It sets including blank holder 1 and cavity plate 2, blank holder 1 is placed in the top of cavity plate 2.Plate of the blank holder 1 for will be shaped to hole flanging
3 are pressed between blank holder 1 and cavity plate 2.There is matrix cavity 4 in cavity plate 2.It is relatively set on blank holder 1 and respectively on cavity plate 2
Portion's coil recess and lower coil groove are embedded with upper end undergauge coil 5, in lower coil groove in upper coil groove
Inside it is embedded with lower end undergauge coil 6.It is provided with pre-manufactured hole on plate 3, axial drawing is equipped with above the edge of the pre-manufactured hole of plate 3
Coil 7, the pre-manufactured hole of plate 3 is interior to be equipped with internal bulging coil 8.Cavity plate 2 is placed on a bottom plate 9, along matrix cavity 4 on bottom plate 9
More springs 10 circumferentially are installed, more springs 10 are arranged vertically upwards, and the upper end of more springs 10 is equipped with a ring baffle
11.Internal bulging coil 8 is vertically arranged multi-turn coil.Upper end undergauge coil 5 and lower end undergauge coil 6 are multi-turn
Ceoncentrically wound coil.Axial drawing coil 7 is also multiple concentric coil.Axial drawing coil 7 and internal bulging coil 8 respectively connect
A power-supply system is connect, upper end undergauge coil 5 and lower end undergauge coil 6 connect a power-supply system, end diameter reducing coil
With axial drawing coil 7, the independent progress charge or discharge of internal bulging coil 8.
Hole flanging forming is carried out to plate using above-mentioned apparatus, the specific steps are as follows:
The plate 3 to hole flanging forming with pre-manufactured hole is clipped between blank holder 1 and cavity plate 2 by the first step, so that axial
Drawing coil 7 is located above the prefabricated bore edges of plate 3, and internal bulging coil 8 is located in the pre-manufactured hole of plate 3, ring baffle
11 are against below the edge of pre-manufactured hole；
Second step, to axial drawing coil 7, upper end undergauge coil 5, lower end undergauge coil 6 and internal bulging coil 8
Charged and discharged, upper end undergauge coil 5 and lower end undergauge coil 6 generate the electromagnetic force being inwardly compressed to plate 3, internal swollen
Shape coil 8 generates the electromagnetic force being pressed downward to plate 3 to the electromagnetic force expanded outward, axial drawing coil 7 is generated at pre-manufactured hole,
The downward deep-drawing deformation under the driving of multidirectional magnetic field force of plate 3, in the downward drawing deformation process of plate 3, ring baffle 11 exists
It is moved down under pressure, the edge of pre-manufactured hole keeps straight on ring baffle 11；
Third step, to axial drawing coil 7, upper end undergauge coil 5, lower end undergauge coil 6 and internal bulging coil 8
Power-off, removes internal bulging coil 8, spring 10 and ring baffle 11, and axial drawing coil 7 is dropped to the flat of prefabricated bore edges
Straight place, discharges again to axial drawing coil 7, upper end undergauge coil 5 and lower end undergauge coil 6, makes the pre-manufactured hole of plate 3
The inner wall mold at edge and cavity plate 2, i.e. the hole flanging forming of completion plate 3.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (6)
1. a kind of device using the driving plate hole flanging forming of multidirectional magnetic field force, including blank holder (1) and cavity plate (2), the pressure
Flange (1) is placed in the top of cavity plate (2), blank holder (1) be used to for the plate (3) shaped to hole flanging being pressed in blank holder (1) and
Between cavity plate (2), there are matrix cavity (4) in the cavity plate (2), it is characterised in that: on the blank holder (1) and on cavity plate (2)
It is relatively set with upper coil groove and lower coil groove respectively, upper end undergauge line is embedded in the upper coil groove
It encloses (5), lower end undergauge coil (6), the edge top of the pre-manufactured hole of the plate (3) is embedded in the lower coil groove
Equipped with axial drawing coil (7), internal bulging coil (8) is equipped in the pre-manufactured hole of plate (3)；The upper end undergauge coil
(5), lower end undergauge coil (6), axial drawing coil (7) and internal bulging coil (8) are connected to the same power-supply system, together
Shi Jinhang charge or discharge.
2. the device according to claim 1 using the driving plate hole flanging forming of multidirectional magnetic field force, it is characterised in that: described
Cavity plate (2) is placed on a bottom plate (9), and the circumferential direction on the bottom plate (9) along matrix cavity (4) is equipped with more springs (10), and more
The spring (10) is arranged vertically upwards, and the upper end of more springs (10) is equipped with a ring baffle (11).
3. the device according to claim 2 using the driving plate hole flanging forming of multidirectional magnetic field force, it is characterised in that: described
Axial drawing coil (7) and internal bulging coil (8) respectively connect a power-supply system, the upper end undergauge coil
(5) and lower end undergauge coil (6) connects a power-supply system, end diameter reducing coil and axial drawing coil (7), internal bulging
Coil (8) independently carries out charge or discharge.
4. the device according to claim 1 or 2 or 3 using the driving plate hole flanging forming of multidirectional magnetic field force, feature exist
In: the internal bulging coil (8) includes vertically arranged multi-turn coil；The upper end undergauge coil (5), lower end undergauge
Coil (6) and axial drawing coil (7) include multiple concentric coil.
5. a kind of method using the driving plate hole flanging forming of multidirectional magnetic field force, it is characterised in that: using as described in claim 1
Device to plate (3) carry out hole flanging forming, specifically includes the following steps:
S1, the plate (3) to hole flanging forming with pre-manufactured hole is clipped between blank holder (1) and cavity plate (2), so that axial draw
Deep coil (7) is located above the prefabricated bore edges of plate (3), and internal bulging coil (8) is located in the pre-manufactured hole of plate (3)；
S2, to axial drawing coil (7), upper end undergauge coil (5), lower end undergauge coil (6) and internal bulging coil (8)
Charged and discharged, upper end undergauge coil (5) and lower end undergauge coil (6) generate the electromagnetic force being inwardly compressed to plate (3),
Internal bulging coil (8) to generating the electromagnetic force that expands outward at pre-manufactured hole, axial drawing coil (7) to plate (3) generate to
The electromagnetic force of pushing, plate (3) downward deep-drawing deformation under the driving of multidirectional magnetic field force, i.e. the hole flanging forming of completion plate (3).
6. a kind of method using the driving plate hole flanging forming of multidirectional magnetic field force, it is characterised in that: using as claimed in claim 2
Device to plate (3) carry out hole flanging forming, specifically includes the following steps:
S1, the plate (3) to hole flanging forming with pre-manufactured hole is clipped between blank holder (1) and cavity plate (2), so that axial draw
Deep coil (7) is located above the prefabricated bore edges of plate (3), and internal bulging coil (8) is located in the pre-manufactured hole of plate (3), ring
Shape baffle (11) is against below the edge of pre-manufactured hole；
S2, to axial drawing coil (7), upper end undergauge coil (5), lower end undergauge coil (6) and internal bulging coil (8)
Charged and discharged, upper end undergauge coil (5) and lower end undergauge coil (6) generate the electromagnetic force being inwardly compressed to plate (3),
Internal bulging coil (8) to generating the electromagnetic force that expands outward at pre-manufactured hole, axial drawing coil (7) to plate (3) generate to
The electromagnetic force of pushing, plate (3) downward deep-drawing deformation under the driving of multidirectional magnetic field force, in the downward deep-drawing deformation mistake of plate (3)
Cheng Zhong, ring baffle (11) move down under stress, and the edge of pre-manufactured hole keeps straight on ring baffle (11)；
S3, to axial drawing coil (7), upper end undergauge coil (5), lower end undergauge coil (6) and internal bulging coil (8)
Power-off removes internal bulging coil (8), spring (10) and ring baffle (11), axial drawing coil (7) is dropped to pre-manufactured hole
The straight place at edge discharges again to axial drawing coil (7), upper end undergauge coil (5) and lower end undergauge coil (6),
Make the prefabricated bore edges of plate (3) and the inner wall mold of cavity plate (2), i.e. the hole flanging forming of completion plate (3).
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| CN201710462714.8A CN107138590B (en) | 2017-06-19 | 2017-06-19 | A kind of device and method using the driving plate hole flanging forming of multidirectional magnetic field force |
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| CN201710462714.8A CN107138590B (en) | 2017-06-19 | 2017-06-19 | A kind of device and method using the driving plate hole flanging forming of multidirectional magnetic field force |
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| CN109848281B (en) * | 2019-03-13 | 2020-10-27 | 中南大学 | Local electromagnetic deep-drawing hole flanging forming method and forming device for large-size plate |
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| CN103586325A (en) * | 2013-11-05 | 2014-02-19 | 华中科技大学 | Electromagnetic forming method for deeply punched member |
| CN103639286A (en) * | 2013-11-29 | 2014-03-19 | 华中科技大学 | Electromagnetic pulse drawing forming integration experimental platform for flat pieces |
| CN106270104A (en) * | 2016-09-07 | 2017-01-04 | 哈尔滨工业大学 | A kind of magnetic field impulse hole flanging formation method of housing component |
| CN106964684A (en) * | 2017-03-31 | 2017-07-21 | 华中科技大学 | A kind of complex multi-step local plastic electromagnetic forming method suitable for sheet material workpiece |
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