CN110000268A - A kind of pair of device and manufacturing process with minutiae metal-sheet parts electro-hydraulic forming - Google Patents
A kind of pair of device and manufacturing process with minutiae metal-sheet parts electro-hydraulic forming Download PDFInfo
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- CN110000268A CN110000268A CN201910422295.4A CN201910422295A CN110000268A CN 110000268 A CN110000268 A CN 110000268A CN 201910422295 A CN201910422295 A CN 201910422295A CN 110000268 A CN110000268 A CN 110000268A
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- electrode
- metal
- liquid chamber
- minutiae
- hydraulic forming
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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
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/06—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure by shock waves
- B21D26/12—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure by shock waves initiated by spark discharge
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
The present invention discloses a kind of to the device with minutiae metal-sheet parts electro-hydraulic forming, including liquid chamber, electrode, mold and pulse high current discharge equipment, electrode is connected through a screw thread with insulation sleeve, insulation sleeve is located in the reserved cavity of electrode bolts, and electrode bolts integral level is screwed in the side wall of liquid chamber；Electrode includes the anode and cathode screwed in respectively from the corresponding two sidewalls of liquid chamber, and wire is pre-wrapped between two electrodes, connects pulse high current discharge equipment outside anode and cathode difference；Workpiece to be formed is placed in the top open part of liquid chamber, is inlaid in the upper cover plate of the top setting of liquid chamber for the mold to component shaping.Of the invention to belong to the local bulging of thin plate class in forming process to device and manufacturing process with minutiae metal-sheet parts electro-hydraulic forming, forming property is good, not wrinkled under two-way tension effect, and can improve bulging depth, springs back small.
Description
Technical field
The present invention relates to metal plate Plastic Forming manufacturing technology fields, more particularly to one kind to band minutiae metal foil
The device and manufacturing process of plate electro-hydraulic forming.
Background technique
It is higher and higher to the technical requirements of precision component with the manufacturing development in high-precision end, especially for some bands
There is the production of minutiae part.Such as the bipolar plates in Proton Exchange Membrane Fuel Cells, have and separates fuel and oxidant, resistance
The effects of only gas penetrates, collects and conduct electric current, especially the depth of Cell Bipolar plate runner imitates energy transmission and conversion
Rate has strong influence, and important role is play in Proton Exchange Membrane Fuel Cells.Traditional metal double polar plates production
Mode has rolling formation, chemical etching, micro spark Milling Process, and in addition there are high-speeds such as electro-magnetic forming and laser forming etc.
Manufacturing process.But the above bipolar plate fabrication method has some limitations, and rolling formation production efficiency is lower, and runner returns
Bullet is big；Chemical etching flow channel depth is low, about 0.3mm, and runner depth-width ratio is low, and production efficiency is low；Micro spark Milling Process
Although the depth-width ratio of runner can be improved, plate thickness requirement is higher, is not suitable for metal sheet；Although electro-magnetic forming belongs to
High-speed forming, but more harshness is required to material category, it is only applicable to the high conductivities plate such as some aluminium alloys, copper alloy；
Laser forming low efficiency, energy loss are big.
Summary of the invention
The object of the present invention is to provide a kind of to device and manufacturing process with minutiae metal-sheet parts electro-hydraulic forming,
To solve the above-mentioned problems of the prior art, the local bulging of thin plate class is belonged in forming process, forming property is good, double
It is not wrinkled under to pulling force effect, and bulging depth can be improved, it springs back small.
To achieve the above object, the present invention provides following schemes: the present invention provides a kind of to band minutiae metal foil
The device of plate electro-hydraulic forming, including liquid chamber, electrode, mold and pulse high current discharge equipment, the electrode and insulation sleeve are logical
Threaded connection is crossed, the insulation sleeve is located in the reserved cavity of electrode bolts, will be described in electrode bolts integral level screw-in
The side wall of liquid chamber；The electrode includes the anode and cathode screwed in respectively from the corresponding two sidewalls of the liquid chamber, two electrodes it
Between be pre-wrapped with wire, anode and the cathode outer connection pulse high current discharge equipment respectively；At the top of the liquid chamber
Opening places workpiece to be formed, is inlaid in the upper cover plate of the top setting of the liquid chamber for the mould to component shaping
Tool.
Preferably, the cavity in the insulation sleeve and the electrode bolts is using interference fit.
Preferably, by pre-tightening hexagon socket head cap screw connection between the upper cover plate and liquid chamber.
Preferably, sealing ring is provided between the electrode bolts inside the liquid chamber.
Preferably, the mold for component shaping uses block insert type, is embedded in upper cover plate, the insert and upper cover
Plate is connected by screw bolts.
Preferably, the pulse high current discharge equipment includes the charge circuit and discharge loop of interval conducting, described to fill
Power supply in electrical circuit is used to charge to capacitor group with charge switch, when discharge switch is closed in the discharge circuit,
The capacitor group is through the coil discharge.
The present invention also provides one kind to band minutiae metal-sheet parts electro-hydraulic forming method, applied to above-mentioned to thin
The device of micro- characteristic metal sheet member electro-hydraulic forming, comprising the following steps:
Mold is designed according to practical specific workpiece size, mold is embedded in blending bolt on upper cover plate and is connected；
Calculate two electrode spacings, and by two electrodes together with electrode bolts contour screw-in liquid chamber, twined prefabricated gold between electrode
Belong to silk；
By fill duty liquid in liquid chamber, the sheet metal that need to be shaped is placed, places the upper cover plate with combination die, lead to
Cross pretension bolt fastening；
Two electrodes are connect by conducting wire with pulse high current discharge equipment positive and negative anodes；
After discharge off, pretension bolt is first dismantled after Environmental security, is then removed upper cover plate and is dismantled with mold, is taken
Lower Forming Workpiece, discharge liquor indoor liquid dismantle electrode, cleaning equipment.
The present invention achieves following technical effect compared with the existing technology:
The present invention is mainly formed the sheet metal with fine feature using electro-hydraulic forming method, and workpiece accuracy is wanted
Ask higher, by taking cell bipolar plate as an example, polar plate flow passage depth-width ratio is improved, for the pure titanium metal plate with a thickness of 0.15mm, height
0.6mm, the wide 1.5mm of ridge can be reached, be equally applicable to titanium, other sheet metals such as aluminium alloy are applied widely to material.Tradition
Manufacturing process is bigger for metal sheet forming difficulty, and forming limit 30%-50% can be improved using the forming of electro-hydraulic high-speed
Left and right, keeps workpiece pad pasting effect more preferable, and the rebound of Forming Workpiece is small, because tooling is relatively easy without punch-pin, reduces cost,
And reduce the friction of punch-pin and thin plate, so that product surface quality is protected, while mass production may be implemented, reduces total
Body cost improves production efficiency.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the working principle diagram to the device with minutiae metal-sheet parts electro-hydraulic forming；
Fig. 2 is the side view of electro-hydraulic forming device；
Fig. 3 is the top view of electro-hydraulic forming device；
Wherein, bonnet bolt on 1；2 pre-tighten hexagon socket head cap screw；3 upper cover plates；4 molds；5 Forming Workpieces；6 liquid chambers；7 electrode spiral shells
Bolt；8 insulation sleeves；9 electrodes；10 sealing rings.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The object of the present invention is to provide a kind of to device and manufacturing process with minutiae metal-sheet parts electro-hydraulic forming,
To solve the above-mentioned problems of the prior art, forming process belongs to the local bulging of thin plate class, and forming property is good, two-way
It is not wrinkled under pulling force effect, and bulging depth can be improved, it springs back small.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
Please refer to Fig. 1-3, wherein Fig. 1 is the working principle to the device with minutiae metal-sheet parts electro-hydraulic forming
Figure；Fig. 2 is the side view of electro-hydraulic forming device；Fig. 3 is the top view of electro-hydraulic forming device.
The invention belongs to metal plate Plastic Forming manufacturing field, mainly for the metal sheet parts for having minutiae,
To dimensional accuracy, forming quality it is more demanding.
For above-mentioned status, propose be all high-speed forming electro-hydraulic forming method, trench features machining accuracies is high, stream
Road depth-width ratio is big, and flow channel depth can reach 0.5-0.7mm, will significantly improve the energy transmission and transfer efficiency of battery, simultaneously
It is loose to plate material type requirements, it is applied widely, and also production efficiency is higher, it can be achieved that batch production.
The present invention shapes metal sheet using electro-hydraulic forming technique, and metal plate formed thereby has fine structure feature, work
Skill equipment and working principle are as shown in Figure 1.
By taking battery pole plates as an example, electro-hydraulic forming operating process is sketched.
Electrode 9 and insulation sleeve 8 are connected through a screw thread first, screw in length appropriate, then by insulation sleeve 8 and electrode bolts
7 logical interference fits are secured together, and are finally again screwed in electrode bolts integral level on the side wall of liquid chamber 6, inside liquid chamber with
Sealing ring 10 between electrode bolts plays sealing function；Placing at liquid chamber upper opening position needs Forming Workpiece 5, and mold 4 is inlayed
It is connected in upper cover plate 3, and through upper bonnet bolt 1, it is easy to disassemble, pass through hexagonal spiral shell in pre-tightening between upper cover plate 3 and liquid chamber 6
Bolt 2 connects, and electrode positive and negative anodes are connected into pulse high current discharge equipment again after getting well by integrated connection outside respectively.
Specific step is as follows for operation:
(1) mold is designed according to practical specific workpiece size, is embedded in blending bolt on upper cover plate 3 and connects, it can basis
Forming Workpiece difference processes different mold panels, facilitates economy.
(2) two electrode spacings are calculated, and by the contour screw-in of two electrodes, with electrode bolts 7 together installation as shown in Figure 1, electricity
Interpolar has twined prefabricated metal silk.
(3) by fill duty liquid in liquid chamber 6, notice that liquid depth has a significant impact to forming effect.
(4) sheet metal that need to be shaped is placed, mold 4 and upper cover plate 3 is placed, is fastened by pretension bolt, guarantees device
Good seal.
(5) such as Fig. 1, two electrodes are connect by conducting wire with pulse high current discharge equipment positive and negative anodes, preparation work；Pass through
Pulse high current discharge equipment makes electrode discharge, and discharge-induced explosion occurs on two interelectrode wires, and then generate impact
Wave makes forming sheet metal.Pulse high current discharge equipment includes the high-voltage pulse capacitor group and charge switch for storing electric energy
(being in normally open).When capacitor group is charged to preset voltage by charge power supply, charge circuit, closure electric discharge are disconnected
Switch, then discharge loop is connected, and capacitor group is through electrode discharge, and short-circuit at wire, generation discharge-induced explosion generates shock wave and makees
For liquid medium, and then implement electro-hydraulic forming process.
(6) after discharge off, pretension bolt is first dismantled after Environmental security, is then removed upper cover plate 3 and is torn open with mold 4
It unloads, removes Forming Workpiece 5, liquid in liquid chamber 6 is discharged, dismantle electrode, cleaning equipment.
Embodiment one
Pure titanium dual polar plates of proton exchange membrane fuel cell, runner are single channel serpentine flow path, metal plate 0.16mm is thick,
Long 240mm, wide 120mm, the wide 1.5mm of runner ridge, high 0.6mm, section is isosceles trapezoid, bottom edge and bevel edge into 60 ° of angles, Qi Tacheng
The production of shape technique is more difficult, is not easy for angle control, good using such method forming pad pasting effect, springs back small, mold gap
0.05mm meets required precision.
Embodiment two
304 stainless steel cell bipolar plates, with a thickness of 0.2mm, runner is single-pass serpentine flow path, long 260mm, wide 220mm, stream
Road section is rectangle, ridge wide 1.8mm, deep 0.7mm, traditional forming methods such as rolling formation low efficiency, and spring back it is big, using this side
Method greatly improves forming efficiency, since electro-hydraulic forming belongs to high-speed forming, can increase plasticity while improving forming limit
Deformability, decreasing rebound.
Embodiment three
Titanium alloy cell bipolar plate, runner are multichannel serpentine flow path, and shape is complex, plate long 240mm, wide 200mm,
Cross section of fluid channel is rectangle, and ridge wide 1.2mm, high 0.7mm, relatively complicated in local internal shaping shape, other way is difficult into
Shape easily cracks on bottom edge and side wall intersection, and adopting said method can easily shape, and guarantee that forming quality is met the requirements.
Example IV
Stainless steel 316 concentric loop runner thin plate, plate thickness 0.2mm, the wide 300mm of plate, long 300mm, intermediate flow channel annulus is most
Major diameter is that 260mm cross section of fluid channel is semicircle, and radius 2mm, Forming Workpiece is more demanding to bulging curved surface circularity, so corresponding
Forming Workpiece rebound should be small, and adopting said method forming meets the requirements circularity forming.
In the present invention to device and manufacturing process with minutiae metal-sheet parts electro-hydraulic forming, compared to tradition at
Shape method, and had the advantage that relative to the high rate shaped such as electro-magnetic forming
1) has the advantages that high-speed manufacturing process, forming limit improves, and runner depth-width ratio is relatively high.
2) it is shaped in contrast to other high-speeds such as electro-magnetic forming, the material category of electro-hydraulic forming application is more, the scope of application
It is wider.
3) high production efficiency is, it can be achieved that mechanical automation is produced in batches.
4) unilateral mold is only needed, complexity and cost reduce, and the improvement of mold becomes easy.
5) capacity usage ratio is relatively high, and Forming Workpiece precision is high.
Specific examples are applied in the present invention, and principle and implementation of the present invention are described, above embodiments
Illustrate to be merely used to help understand method and its core concept of the invention；At the same time, for those skilled in the art, according to
According to thought of the invention, there will be changes in the specific implementation manner and application range.In conclusion the content of the present specification
It should not be construed as limiting the invention.
Claims (7)
1. a kind of to the device with minutiae metal-sheet parts electro-hydraulic forming, it is characterised in that: including liquid chamber, electrode, mold
With pulse high current discharge equipment, the electrode is connected through a screw thread with insulation sleeve, and the insulation sleeve is located at the pre- of electrode bolts
It leaves a blank in chamber, the electrode bolts integral level is screwed in the side wall of the liquid chamber；The electrode includes respectively from the liquid chamber
The anode and cathode that corresponding two sidewalls screw in are pre-wrapped with wire, anode and cathode outer connection respectively between two electrodes
The pulse high current discharge equipment；Workpiece to be formed is placed in the top open part of the liquid chamber, is set at the top of the liquid chamber
It is inlaid in the upper cover plate set for the mold to component shaping.
2. according to claim 1 to the device with minutiae metal-sheet parts electro-hydraulic forming, it is characterised in that: described
Cavity in insulation sleeve and the electrode bolts is using interference fit.
3. according to claim 1 to the device with minutiae metal-sheet parts electro-hydraulic forming, it is characterised in that: described
By pre-tightening hexagon socket head cap screw connection between upper cover plate and liquid chamber.
4. according to claim 1 to the device with minutiae metal-sheet parts electro-hydraulic forming, it is characterised in that: described
Sealing ring is provided between the electrode bolts inside liquid chamber.
5. according to claim 1 to the device with minutiae metal-sheet parts electro-hydraulic forming, it is characterised in that: described
Pulse high current discharge equipment includes the charge circuit and discharge loop of interval conducting, power supply and charging in the charge circuit
Switch is for charging to capacitor group, and when discharge switch is closed in the discharge circuit, the capacitor group is through the line
Circle electric discharge.
6. according to claim 1 to the device with minutiae metal-sheet parts electro-hydraulic forming, it is characterised in that: described
Mold for component shaping is embedded in upper cover plate using block insert type, and the insert is connected by screw bolts with upper cover plate.
7. it is a kind of to band minutiae metal-sheet parts electro-hydraulic forming method, it is applied to of any of claims 1-6
To the device with fine feature metal-sheet parts electro-hydraulic forming, which comprises the following steps:
Mold is designed according to practical specific workpiece size, mold is embedded in blending bolt on upper cover plate and is connected；
Calculate two electrode spacings, and by two electrodes together with electrode bolts contour screw-in liquid chamber, twined prefabricated metal silk between electrode；
By fill duty liquid in liquid chamber, the sheet metal that need to be shaped is placed, the upper cover plate with combination die is placed, passes through preload
Bolt fastening；
Two electrodes are connect by conducting wire with pulse high current discharge equipment positive and negative anodes；
After discharge off, pretension bolt is first dismantled, upper cover plate is then removed and is dismantled with mold, remove Forming Workpiece, is discharged
Liquid indoor liquid dismantles electrode, cleaning equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910422295.4A CN110000268A (en) | 2019-05-21 | 2019-05-21 | A kind of pair of device and manufacturing process with minutiae metal-sheet parts electro-hydraulic forming |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910422295.4A CN110000268A (en) | 2019-05-21 | 2019-05-21 | A kind of pair of device and manufacturing process with minutiae metal-sheet parts electro-hydraulic forming |
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| CN110000268A true CN110000268A (en) | 2019-07-12 |
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| CN201910422295.4A Pending CN110000268A (en) | 2019-05-21 | 2019-05-21 | A kind of pair of device and manufacturing process with minutiae metal-sheet parts electro-hydraulic forming |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110548800A (en) * | 2019-08-26 | 2019-12-10 | 华中科技大学 | Electro-hydraulic forming tool device and method based on inertia constraint |
| CN114160655A (en) * | 2021-10-20 | 2022-03-11 | 哈尔滨工业大学（威海） | Metal sheet low-temperature electro-hydraulic forming device and method containing array features |
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| SU593358A2 (en) * | 1976-03-02 | 1981-10-07 | Ленинградский Ордена Ленина Политехнический Институт Им. М.И.Калинина | Device for electrohydraulic moulding of articles |
| JPS5845067Y2 (en) * | 1975-07-11 | 1983-10-13 | トウアトクシユデンキ カブシキガイシヤ | Shindobanseikeiyo Kanagata |
| CN1284017A (en) * | 1997-12-29 | 2001-02-14 | 普尔萨焊接有限公司 | Method and appts. for pulsed discharge forming of dish from planar plate |
| JP2003311344A (en) * | 2002-04-16 | 2003-11-05 | National Institute Of Advanced Industrial & Technology | Frozen bulge forming method and equipment |
| CN105665512A (en) * | 2016-04-13 | 2016-06-15 | 江苏海事职业技术学院 | Electro-hydraulic forming circuit device |
| CN205496359U (en) * | 2016-04-13 | 2016-08-24 | 江苏海事职业技术学院 | Electrohydraulic forming circuit arrangement |
| CN106734499A (en) * | 2016-12-01 | 2017-05-31 | 湘潭大学 | Sheet material warms electro-hydraulic high speed impact quasistatic hydraulic pressure compound molding device and the sheet material forming method realized using the device |
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2019
- 2019-05-21 CN CN201910422295.4A patent/CN110000268A/en active Pending
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| JPS5845067Y2 (en) * | 1975-07-11 | 1983-10-13 | トウアトクシユデンキ カブシキガイシヤ | Shindobanseikeiyo Kanagata |
| SU593358A2 (en) * | 1976-03-02 | 1981-10-07 | Ленинградский Ордена Ленина Политехнический Институт Им. М.И.Калинина | Device for electrohydraulic moulding of articles |
| CN1284017A (en) * | 1997-12-29 | 2001-02-14 | 普尔萨焊接有限公司 | Method and appts. for pulsed discharge forming of dish from planar plate |
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| CN105665512A (en) * | 2016-04-13 | 2016-06-15 | 江苏海事职业技术学院 | Electro-hydraulic forming circuit device |
| CN205496359U (en) * | 2016-04-13 | 2016-08-24 | 江苏海事职业技术学院 | Electrohydraulic forming circuit arrangement |
| CN106734499A (en) * | 2016-12-01 | 2017-05-31 | 湘潭大学 | Sheet material warms electro-hydraulic high speed impact quasistatic hydraulic pressure compound molding device and the sheet material forming method realized using the device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110548800A (en) * | 2019-08-26 | 2019-12-10 | 华中科技大学 | Electro-hydraulic forming tool device and method based on inertia constraint |
| CN110548800B (en) * | 2019-08-26 | 2021-04-20 | 华中科技大学 | Electro-hydraulic forming tool device and method based on inertia constraint |
| CN114160655A (en) * | 2021-10-20 | 2022-03-11 | 哈尔滨工业大学（威海） | Metal sheet low-temperature electro-hydraulic forming device and method containing array features |
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