CN111604402A - Aluminum alloy sheet precise shaping method and device based on electro-hydraulic forming - Google Patents
Aluminum alloy sheet precise shaping method and device based on electro-hydraulic forming Download PDFInfo
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- CN111604402A CN111604402A CN201910141769.8A CN201910141769A CN111604402A CN 111604402 A CN111604402 A CN 111604402A CN 201910141769 A CN201910141769 A CN 201910141769A CN 111604402 A CN111604402 A CN 111604402A
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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
- B21D26/10—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 generated by evaporation, e.g. of wire, of liquids
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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
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
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Abstract
The invention provides an aluminum alloy sheet precise shaping method based on electro-hydraulic forming, which comprises the following steps: A. preparing a tool; B. clamping a workpiece; C. filling an electro-hydraulic forming medium; D. vacuumizing the part to be shaped; E. electro-hydraulic finishing of the aluminum alloy part. The pre-forming piece can be completed by using technological methods such as liquid filling forming or traditional stamping, most of the shape characteristics of the pre-forming piece meet the final forming requirement, a small amount of local small characteristics and small round corners are difficult to complete by using the technological methods such as liquid filling forming or traditional stamping, and the pre-forming piece is required to be completed by using the electro-hydraulic precise shaping method.
Description
Technical Field
The invention relates to the field of precision forming of aluminum alloy sheets, in particular to a precision shaping method and device of an aluminum alloy sheet based on electro-hydraulic forming.
Background
Aluminum alloy has been widely used in many important industrial fields such as automobiles, aviation, military and the like as an important lightweight material. Although the aluminum alloy material has the characteristics of high strength, light weight, high efficiency and excellent performance, the problems of narrow plastic deformation range, high forming pressure, large resilience and the like still exist, when the small characteristics of local deep grooves, sharp edges and corners and the like of the aluminum alloy sheet part are formed by using the traditional cold stamping process, the sheet is easy to excessively thin or break, and in order to ensure that the sheet is not excessively thin, the cold stamping process needs multi-pass forming and shaping procedures. In addition, the cold stamping process often causes surface scraping of the aluminum alloy plate, so that orange peel and slip lines are easily formed on the surface, and the aesthetic requirements of a formed part are seriously influenced.
Although the plasticity of the aluminum alloy material can be improved by high-temperature forming or warm forming, heating equipment must be added, the cost is increased, and the energy consumption is increased.
Hydroforming is an important technique for forming aluminum alloy sheets and tubes. It has many advantages such as effectively suppressing the springback of the metal plate member and improving the forming accuracy, reducing the forming passes, and saving the die cost. However, for hydroforming of some localized small features, a greater plenum pressure is required to achieve full film application, resulting in increased equipment tonnage. In addition, as the pressure of the liquid chamber is increased, the plate material of the adhered mould part is difficult to supplement to the area to be shaped, and the excessive thinning and even cracking of the wall thickness of the plate material are easy to occur.
Research shows that the aluminum alloy has the characteristic of increasing the elongation rate under the condition of high-speed deformation. Therefore, high-speed forming is also an effective means for solving the problem of poor plasticity of the aluminum alloy, and high-speed forming technologies such as electro-hydraulic forming, electromagnetic forming and the like attract attention. However, many key technical problems of high-speed forming in the application of large deformation of materials are not well solved, and the high-speed forming is only practically applied in the fields of small deformation and precise forming so far.
Disclosure of Invention
The invention provides an aluminum alloy sheet precise shaping method based on electro-hydraulic forming, aiming at overcoming the defects of the traditional stamping process and the traditional liquid-filling forming process when local small features of aluminum alloy are formed and exerting the advantages of high-speed forming when local small features such as small round corners or sharp shapes are formed.
In order to achieve the purpose, the invention provides an aluminum alloy sheet precise shaping method based on electro-hydraulic forming, which comprises the following steps:
A. preparing a tool, namely adjusting the distance between a positive electrode and a negative electrode for electro-hydraulic forming in a male die liquid chamber, and connecting a metal material between the positive electrode and the negative electrode in an explosive wire mode;
B. clamping a workpiece, namely placing an aluminum alloy preformed piece on the punch liquid chamber, enabling the convex part to face upwards, pressing the edge of the preformed piece by using a shaping female die, attaching the part of the preformed piece which is subjected to final forming to a cavity of the shaping female die, and enabling a sealed space to be formed between the preformed piece and the punch liquid chamber;
C. filling an electro-hydraulic forming medium, and introducing water into the punch liquid chamber to fill the space between the preformed piece and the punch liquid chamber with water;
D. vacuumizing the part to be shaped, and pumping out air in the space between the part to be shaped of the preformed piece and the shaping female die to form negative pressure vacuum;
E. electro-hydraulic finishing of the aluminum alloy part, starting the high-voltage pulse generator to charge a capacitor bank of the high-voltage pulse generator to a preset voltage, stopping charging, switching on a discharge switch to discharge the capacitor bank, generating instantaneous high-voltage pulse to rapidly vaporize, explode and expand the metal material between a positive electrode and a negative electrode and the surrounding water medium to form shock waves, so that the part to be shaped of the preformed part is deformed to be tightly attached to a cavity of a shaping female die to finish the precise shaping of the preformed part.
According to the invention, the aluminum alloy sheet with most shape characteristics finished by the over-pressing process or the liquid-filling forming is placed on the specific shaping die, and the local small characteristics of the aluminum alloy sheet are precisely shaped by utilizing the principle that the electro-hydraulic medium instantaneously expands to generate shock waves under the condition of high-pressure pulse.
Optionally, the method can select whether to connect a metal material between the positive electrode and the negative electrode according to actual requirements, when the metal material is connected between the positive electrode and the negative electrode, the precise shaping mode is wire explosion electro-hydraulic shaping, after the high-voltage pulse generator is charged, the discharge switch is turned on, the capacitor bank releases high-voltage pulse current to the positive electrode and the negative electrode, the high-voltage pulse current passes through the metal material between the positive electrode and the negative electrode, and the instantaneously generated high temperature enables the metal material and surrounding liquid to be rapidly vaporized and exploded and expand outwards at a very high speed to form a strong impact pressure wave, so that the part of the workpiece to be shaped is deformed at a high speed; when the metal material is not connected between the positive electrode and the negative electrode, the precise shaping mode is gap discharge electrohydraulic forming, after the high-voltage pulse generator is charged, the discharge switch is turned on, the capacitor bank releases high-voltage pulse current to the positive electrode and the negative electrode, so that the gap between the electrodes is broken down, high-speed shock waves and liquid flow shock are generated in the water medium near the electrodes, and the part of the workpiece to be shaped is deformed at high speed.
The aluminum alloy pre-forming piece is a pre-formed aluminum alloy sheet, most of shape characteristics of the aluminum alloy sheet meet the final forming requirement in a liquid-filling forming or stamping forming mode, and a small amount of round corner positions or small characteristics need to be precisely shaped.
Therefore, because high-speed forming is only practically applied in the field of small deformation and precision forming, most of the shape requirements of the aluminum alloy sheet are generally finished by adopting the traditional stamping forming or liquid filling forming mode to form a preformed piece, and then the method can be adopted to carry out precision shaping aiming at local small features which cannot be finished by the traditional process.
In a further improvement, step E is followed by:
and (4) taking out the workpiece, discharging water in the liquid chamber of the male die after the precision shaping is finished, opening the shaping female die, and taking out the aluminum alloy part subjected to precision shaping.
The invention also provides an aluminum alloy sheet precise shaping device based on electro-hydraulic forming, which adopts the aluminum alloy sheet precise shaping method based on electro-hydraulic forming, and comprises a male die liquid chamber, a shaping female die, a positive electrode, a negative electrode, a metal material and a high-voltage pulse generator;
one ends of the positive electrode and the negative electrode are respectively arranged in the male die liquid chamber and keep a certain distance, the metal material is connected between the positive electrode and the negative electrode in an explosion wire mode, and the other ends of the positive electrode and the negative electrode are respectively arranged outside the male die liquid chamber and are connected with the high-voltage pulse generator through leads;
and placing an aluminum alloy sheet to be shaped on the punch liquid chamber, enabling the convex part of the aluminum alloy sheet to face upwards, pressing the edge of the aluminum alloy sheet by using the shaping female die, attaching the part of the aluminum alloy sheet which is finally shaped to a cavity of the shaping female die, and forming a sealed space between the aluminum alloy sheet and the punch liquid chamber.
Therefore, the device provides a hardware basis for the method, and the metal material is connected between the positive electrode and the negative electrode, so that the metal material and surrounding liquid are quickly vaporized and exploded under high-voltage pulse current and expand outwards at the highest speed to form strong impact pressure waves to finish electro-hydraulic forming of the workpiece to be shaped.
Wherein the high voltage pulse generator comprises:
a step-up transformer connected to an external voltage;
the positive pole of the boosting transformer is connected with one end of the positive pole positioned outside the liquid chamber of the male die after being connected with a rectifying element, a current-limiting resistor and a discharge switch in series, and the negative pole of the boosting transformer is connected with one end of the negative pole positioned outside the liquid chamber of the male die;
and a capacitor bank is connected between the node of the current-limiting resistor and the discharge switch and the negative electrode of the boosting transformer.
From above, the operating principle of this high voltage pulse generator is: the rectifier element converts the voltage boosted by the booster transformer into direct-current voltage, the direct-current voltage can charge the capacitor bank after passing through the current-limiting resistor, the discharge switch is closed after the charging is finished, and the capacitor bank releases high-voltage pulse current between the positive electrode and the negative electrode of the electro-hydraulic forming, so that the surrounding liquid between the electrodes generates high-speed shock waves and liquid flow shock, and the electro-hydraulic forming of the workpiece to be shaped is finished.
Wherein the metal material is a metal wire or a metal foil.
Therefore, according to the actual requirement of precise shaping, a ribbon-shaped metal foil can be selected to be connected between the positive electrode and the negative electrode so as to ensure that the explosion generates shock waves with enough strength, and besides, a metal wire can be selected to be connected between the positive electrode and the negative electrode.
And the shaping female die is provided with a channel for vacuumizing and is used for connecting a vacuum pump so as to pump out air in a space between the part to be shaped of the aluminum alloy sheet and the shaping female die.
Therefore, negative pressure vacuum is formed in the space between the local non-die-sticking part of the aluminum alloy sheet and the shaping female die, and resistance of the aluminum alloy sheet during instantaneous high-speed deformation is favorably reduced.
Alternatively, the material of the positive electrode and the negative electrode can be copper, brass or stainless steel.
Optionally, the metal material may be selected from materials with low melting point and high conductivity, such as copper, aluminum, and the like.
In conclusion, the aluminum alloy sheet precise shaping process based on electro-hydraulic forming has the following characteristics:
(1) the electro-hydraulic forming is high-speed forming, the forming speed can reach hundreds of meters per second, which is far higher than the forming speed of a quasi-static forming process (traditional stamping, liquid-filling forming and the like), the forming performance of the aluminum alloy material can be improved, the shaping precision is high, and the resilience of a workpiece is small;
(2) the shaping die has a simplified structure, and does not need the matching requirement of a male die and male and female dies;
(3) the required shock wave and pressure distribution can be obtained by adjusting the arrangement of the metal material formed by using the wire explosion electro-hydraulic forming, so that the requirement of precise shaping of the aluminum alloy plate with a complex shape is met;
(4) compared with gap discharge electro-hydraulic forming, the line explosion electro-hydraulic forming has the advantages of stable discharge process and strong repeatability.
Drawings
FIG. 1 is a schematic view of an assembly of a preform and a mold before shaping based on a wire explosion electro-hydraulic forming method according to an embodiment;
FIG. 2 is a schematic view of the assembly of the preform and the mold before shaping in the second embodiment based on the wire explosion electro-hydraulic forming method;
FIG. 3 is a schematic view of the assembly of a preform and a mold before shaping in a gap discharge electro-hydraulic forming manner according to the third embodiment;
FIG. 4 is a schematic diagram of the die attaching condition of the preformed piece after electro-hydraulic shaping.
Detailed Description
The invention mainly provides an aluminum alloy sheet precise shaping device and method based on electro-hydraulic forming, which are further described with reference to the accompanying drawings.
Example one
As shown in FIG. 1, the aluminum alloy sheet precision shaping device based on electro-hydraulic forming provided by the invention comprises: the device comprises a male die liquid chamber 1, a shaping female die 2, an electrode 4, a metal foil 5 and a high-voltage pulse generator;
the male die liquid chamber 1 can be filled with a water medium 6 as a force transmission medium for electro-hydraulic forming;
the high-voltage pulse generator consists of a discharge switch 7, a current-limiting resistor 8, a rectifier element 9, a capacitor bank 10 and a step-up transformer 11;
the boosting transformer 11 is connected with external voltage, the anode of the boosting transformer 11 is connected with one end of the positive electrode 4 positioned outside the convex liquid chamber 1 after being connected with a rectifying element 9, a current-limiting resistor 8 and a discharge switch 7 in series, and the cathode of the boosting transformer 11 is connected with one end of the negative electrode of the electrode 4 positioned outside the convex liquid chamber 1;
a capacitor bank 10 is connected between the node of the current limiting resistor 8 and the discharge switch 7 and the negative electrode of the step-up transformer 11.
In the embodiment, the shaping is carried out by adopting a device shown in fig. 1 in a mode based on line explosion electro-hydraulic forming, the blank used by the method is the aluminum alloy preformed piece 3, the preforming method is a liquid-filling forming or traditional stamping process, most of the shape characteristics of the preformed piece 3 meet the final forming requirement, and a small number of small round corner parts or local small characteristics are difficult to complete by the process methods such as liquid-filling forming or traditional stamping and the like and need to be completed by the electro-hydraulic precise shaping method;
as shown in figure 1, a punch liquid chamber 1 and a shaping die 2 of the device are combined to form an aluminum alloy sheet electro-hydraulic precision shaping die, a preformed piece 3 is placed on the punch liquid chamber 1, a convex part is upward, the edge of the preformed piece 3 is pressed by the shaping die 2, a cavity between the preformed piece 3 and the punch liquid chamber 1 forms a closed space, electrodes 4 are a pair of electrodes comprising a positive electrode and a negative electrode, materials can be copper, brass or stainless steel, and the like, the electrodes 4 extend into the space below the preformed piece 3 through the side wall of the punch liquid chamber 1, the electrodes 4 are respectively connected with the positive electrode and the negative electrode of a high-voltage pulse generator through leads, a metal foil 5 is connected between the positive electrode and the negative electrode of the electrodes 4, the metal foil 5 is positioned near the part to be shaped of the preformed piece 3, and the metal foil 5 is generally made of a, injecting an aqueous medium 6 into a closed space between the preformed piece 3 and the punch liquid chamber 1 through a water inlet channel of the punch liquid chamber 1 and filling the closed space;
the shaping female die 2 is also provided with a channel for vacuumizing, and the channel is connected with an external vacuum pump, so that the space between the part of the preformed piece 3 which is not attached with the die and the shaping female die 2 can form negative pressure vacuum, and the resistance of the preformed piece 3 during instantaneous high-speed deformation is reduced.
In summary, the shaping of the aluminum alloy preform by the above apparatus comprises the steps of:
s101: preparing a tool, namely adjusting the distance between a positive electrode and a negative electrode of an electrode 4 in a convex liquid chamber 1, and connecting a metal foil 5 between the positive electrode and the negative electrode of the electrode 4 by adopting an explosive wire mode;
s102: clamping a workpiece, namely placing an aluminum alloy preformed piece 3 on a punch liquid chamber 1, enabling a convex part to face upwards, pressing the edge of the preformed piece 3 by using a shaping female die 2, attaching a part of the preformed piece 3 which is subjected to final shaping to a cavity of the shaping female die 2, and forming a sealed space between the preformed piece 3 and the punch liquid chamber 1;
s103: filling an electro-hydraulic forming medium, namely introducing a water medium 6 into the punch liquid chamber 1 to fill the space between the preformed piece 3 and the punch liquid chamber 1 with the water medium 6;
s104: vacuumizing the part to be shaped, starting an external vacuum pump connected with the shaping female die 2, so that a negative pressure vacuum is formed in the space between the part to be shaped of the aluminum alloy preform 3 and the shaping female die 2, and the resistance of the aluminum alloy sheet at the part is reduced during subsequent instantaneous high-speed deformation;
s105: electro-hydraulic finishing of an aluminum alloy piece, starting a charging program of a high-voltage pulse generator, enabling a capacitor bank 10 of the high-voltage pulse generator to be charged to reach a preset voltage, then stopping charging, switching on a discharge switch 7 to enable the high-voltage pulse generator to discharge, enabling pulse large current to pass through a metal foil 5 between a positive electrode and a negative electrode of an electrode 4 extending into a male die liquid chamber, enabling the metal foil and surrounding liquid to be rapidly vaporized and exploded and expand outwards at a high speed due to instantaneously generated high temperature to form a strong impact pressure wave, enabling a local non-die-sticking part of an aluminum alloy preformed piece to be deformed at a high speed within a very short time to stick to a shaping female die cavity, and completing precise shaping of local small characteristics of an;
s106: and (3) taking out the workpiece, discharging water in the male die liquid chamber 1 after the precision shaping is finished, opening the shaping female die 2, and taking out the aluminum alloy part which is subjected to the local small-characteristic precision shaping.
Example two
In accordance with the principle of the first embodiment, the invention further provides a second embodiment, two metal wires with different resistances are connected in parallel between the positive electrode and the negative electrode of the electrode 4 in an explosion wire mode, wherein the purpose of different resistances can be realized by selecting metal wires with different materials or different lengths or different thicknesses, the voltage of the high-voltage pulse generator is controlled to gradually rise for discharging, vaporization and explosion can be successively generated twice in a very short time due to the different resistances of the metal wires, and the part of the aluminum alloy preformed piece which is not adhered to the die is subjected to high-speed deformation in a very short time through shock waves generated by the vaporization and explosion twice, so that the part is adhered to the die cavity of the shaping die, and the precise shaping of local small features of the aluminum alloy sheet is completed;
in the embodiment, two or even more metal wires can be connected between the positive electrode and the negative electrode in an explosion wire mode, so that the metal wires are exploded successively under the action of pulse current, the requirement on pulse large current when a large-resistance metal foil is adopted in the original scheme is reduced, the pulse voltage can be reduced to a certain extent, and various schemes can be provided for local small-characteristic precise shaping.
EXAMPLE III
The first embodiment and the second embodiment provided by the invention are based on a wire explosion electro-hydraulic forming mode to precisely shape the aluminum alloy sheet, in practical application, according to different conditions, the electro-hydraulic precise shaping method of the aluminum alloy sheet can also use gap discharge electro-hydraulic forming without adding metal foils, for example, as shown in an assembly schematic diagram of a pre-forming piece and a mold before shaping based on the gap discharge electro-hydraulic forming mode shown in fig. 2, the used device comprises a punch liquid chamber 1, a shaping female die 2, an electrode 4 and a high-voltage pulse generator, the high-voltage pulse generator consists of a discharge switch 7, a current-limiting resistor 8, a rectifier element 9, a capacitor group 10 and a step-up transformer 11, and is different from the device based on the wire explosion electro-hydraulic forming mode in the first embodiment, and the difference in the first embodiment is that no metal foil exists between.
When the device provided by the embodiment is used for shaping the aluminum alloy preformed piece, the shaping step is consistent with the principle of the first embodiment, and the difference is that metal foils are not connected between the positive electrode and the negative electrode of the electrode 4 in the embodiment, so that after the capacitor bank of the high-voltage pulse generator is charged, the discharge switch 7 is switched on, high voltage is instantly applied between the positive electrode and the negative electrode of the electrode 4 extending into the punch liquid chamber, a discharge gap is broken down, high-voltage discharge is generated, huge impact current is formed in a loop, huge impact waves and hydraulic impact are formed in an aqueous medium around the electrode 4, the part, which is not attached to the die, of the aluminum alloy preformed piece 3 is deformed at high speed in a very short time and is attached to the cavity of the shaping die 2, and the precise shaping of local small features of the aluminum alloy sheet.
As shown in fig. 4, the aluminum alloy part after precision shaping by the method of the above embodiment is also finished to be finally shaped at the local unmolded part, so as to meet the requirement of precision shaping.
In conclusion, the precision shaping method and the precision shaping device provided by the invention overcome the defects of the traditional stamping process and the liquid filling forming process in forming local small characteristics of the aluminum alloy, play the advantages of high-speed forming in forming local small characteristics such as small round corners or sharp shapes and the like, have simple devices and lower cost, and meet the use requirements in the fields of small deformation and precision forming.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. The precise shaping method of the aluminum alloy sheet based on electro-hydraulic forming is characterized by comprising the following steps:
A. preparing a tool, namely adjusting the distance between a positive electrode and a negative electrode for electro-hydraulic forming in a male die liquid chamber, and connecting a metal material between the positive electrode and the negative electrode in an explosive wire mode;
B. clamping a workpiece, namely placing an aluminum alloy preformed piece on the punch liquid chamber, enabling the convex part to face upwards, pressing the edge of the preformed piece by using a shaping female die, attaching the part of the preformed piece which is subjected to final forming to a cavity of the shaping female die, and enabling a sealed space to be formed between the preformed piece and the punch liquid chamber;
C. filling an electro-hydraulic forming medium, and introducing water into the punch liquid chamber to fill the space between the preformed piece and the punch liquid chamber with water;
D. vacuumizing the part to be shaped, and pumping out air in the space between the part to be shaped of the preformed piece and the shaping female die to form negative pressure vacuum;
E. electro-hydraulic finishing of the aluminum alloy part, starting the high-voltage pulse generator to charge a capacitor bank of the high-voltage pulse generator to a preset voltage, stopping charging, switching on a discharge switch to discharge the capacitor bank, generating instantaneous high-voltage pulse to rapidly vaporize, explode and expand the metal material between a positive electrode and a negative electrode and the surrounding water medium to form shock waves, so that the part to be shaped of the preformed part is deformed to be tightly attached to a cavity of a shaping female die to finish the precise shaping of the preformed part.
2. The method of claim 1, wherein the aluminum alloy preform is a preformed aluminum alloy sheet having a majority of its shape characteristics already in compliance with final forming requirements by hydroforming or stamping, and a small number of fillet locations or small features require precision shaping.
3. The aluminum alloy sheet precise shaping device based on electro-hydraulic forming is characterized in that an aluminum alloy sheet precise shaping method based on electro-hydraulic forming is adopted, and the device comprises a male die liquid chamber, a shaping female die, a positive electrode, a negative electrode, a metal material and a high-voltage pulse generator;
one ends of the positive electrode and the negative electrode are respectively arranged in the male die liquid chamber and keep a certain distance, the metal material is connected between the positive electrode and the negative electrode in an explosion wire mode, and the other ends of the positive electrode and the negative electrode are respectively arranged outside the male die liquid chamber and are connected with the high-voltage pulse generator through leads;
and placing an aluminum alloy sheet to be shaped on the punch liquid chamber, enabling the convex part of the aluminum alloy sheet to face upwards, pressing the edge of the aluminum alloy sheet by using the shaping female die, attaching the part of the aluminum alloy sheet which is finally shaped to a cavity of the shaping female die, and forming a sealed space between the aluminum alloy sheet and the punch liquid chamber.
4. The apparatus of claim 3, wherein the high voltage pulse generator comprises:
a step-up transformer connected to an external voltage;
the positive pole of the boosting transformer is connected with one end of the positive pole positioned outside the liquid chamber of the male die after being connected with a rectifying element, a current-limiting resistor and a discharge switch in series, and the negative pole of the boosting transformer is connected with one end of the negative pole positioned outside the liquid chamber of the male die;
and a capacitor bank is connected between the node of the current-limiting resistor and the discharge switch and the negative electrode of the boosting transformer.
5. The device of claim 3, wherein the metallic material is a wire or a metal foil.
6. The device according to claim 3, wherein the shaping die is provided with a channel for vacuumizing, and the channel is used for connecting a vacuum pump so as to pump out air in a space between the part to be shaped of the aluminum alloy sheet and the shaping die.
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| CN112275888A (en) * | 2020-09-07 | 2021-01-29 | 华中科技大学 | Electromagnetic electro-hydraulic composite forming method and device |
| CN113857856A (en) * | 2021-10-26 | 2021-12-31 | 福州大学 | Device and method for forming and welding metal plate |
| CN114589242A (en) * | 2022-03-03 | 2022-06-07 | 华中科技大学 | Electro-hydraulic local orthopedic device and method for metal workpiece |
| CN114713702A (en) * | 2022-03-24 | 2022-07-08 | 华中科技大学 | Metal processing workpiece shape correcting processing device and method based on electric explosion |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101574771A (en) * | 2008-05-05 | 2009-11-11 | 福特全球技术公司 | Pulsed electro-hydraulic calibration of stamped panels |
| CN101574717A (en) * | 2008-05-05 | 2009-11-11 | 福特全球技术公司 | Electrohydraulic forming method for formed sheet metal blank |
| CN201552234U (en) * | 2008-05-05 | 2010-08-18 | 福特全球技术公司 | Electro-hydraulic forming tool |
| CN201799515U (en) * | 2009-09-21 | 2011-04-20 | 福特环球技术公司 | Tool for sheet metal forming |
| CN202398691U (en) * | 2010-10-29 | 2012-08-29 | 福特环球技术公司 | Gap discharge electro-hydraulic forming (EHF) device for forming parts |
| CN104785605A (en) * | 2015-03-31 | 2015-07-22 | 西北工业大学 | Electro-hydraulic forming device for pipe fitting and forming method |
| CN105665512A (en) * | 2016-04-13 | 2016-06-15 | 江苏海事职业技术学院 | Electro-hydraulic forming circuit device |
| 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 |
| CN107309322A (en) * | 2017-06-26 | 2017-11-03 | 湘潭大学 | Sheet metal electro-hydraulic forming device and manufacturing process based on electro plastic effect |
-
2019
- 2019-02-26 CN CN201910141769.8A patent/CN111604402A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101574771A (en) * | 2008-05-05 | 2009-11-11 | 福特全球技术公司 | Pulsed electro-hydraulic calibration of stamped panels |
| CN101574717A (en) * | 2008-05-05 | 2009-11-11 | 福特全球技术公司 | Electrohydraulic forming method for formed sheet metal blank |
| CN201552234U (en) * | 2008-05-05 | 2010-08-18 | 福特全球技术公司 | Electro-hydraulic forming tool |
| CN201799515U (en) * | 2009-09-21 | 2011-04-20 | 福特环球技术公司 | Tool for sheet metal forming |
| CN202398691U (en) * | 2010-10-29 | 2012-08-29 | 福特环球技术公司 | Gap discharge electro-hydraulic forming (EHF) device for forming parts |
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