CN201552232U - Efficient electro-plastic punch forming device - Google Patents
Efficient electro-plastic punch forming device Download PDFInfo
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- CN201552232U CN201552232U CN2009201340448U CN200920134044U CN201552232U CN 201552232 U CN201552232 U CN 201552232U CN 2009201340448 U CN2009201340448 U CN 2009201340448U CN 200920134044 U CN200920134044 U CN 200920134044U CN 201552232 U CN201552232 U CN 201552232U
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- sheet metal
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- electroplastic
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Abstract
An efficient electro-plastic punch forming device comprises a male mould, a female mould, a blank-holding device used for pushing a sheet metal to be punched on the male mould, and a high energy pulsed power supply, as well as two electric connection devices which are respectively mounted on two sides of the blank-holding device, insulated from the blank-holding device, and respectively connected to the two output ends of the high energy pulsed power supply, and an insulating film used for insulating the sheet metal from the female mould. When the sheet metal is punched through mold closing, the high energy pulsed power supply leads impulse current to the sheet metal through the electric connection device insulated from the blank-holding device, so that the electro-plasticity processing and forming of the sheet metal can be accomplished synchronously under ambient temperature; additionally, the forming temperature is lowered, the surface texture of products is improved, and the yield is increased; and the utility model has the advantages of convenient installation and safe use, avoids the electrical energy dissipation on the blank-holding device and the female mould, and further improves the utilization ratio of electrical energy.
Description
[technical field]
The utility model relates to a kind of high-efficiency electroplastic punch molding device, it is applied to sheet metal by a pair of arrangements of electric connection with the flange fixing installation insulation with the high energy pulse electric current, at room temperature can finish synchronously, handle and moulding as the Electroplastic of magnesium alloy sheet, aluminium alloy sheet, copper sheet, all kinds of steel sheets etc. to sheet metal.
[background technology]
The magnesium alloy that is called as " green metal material " has advantages such as density is little, specific strength is high, capability of electromagnetic shielding is good.Except being widely used in automobile industry, Aero-Space industry, also be applied to industries such as computer, communication, consumer electronics, become the main flow of current and future development, magnesium alloy plate has also received great concern at battery industry, is intended to instead of zinc sheet alloy in the manufacturing of dry cell.But because the influence of the close-packed hexagonal structure of magnesium alloy, at room temperature plastic deformation ability is very poor to make magnesium alloy plate, ftractures easily when moulding, thereby produces very high scrappage, so the magnesium alloy plate punch forming must at high temperature be carried out.
Existing magnesium alloy plate punch forming process is: with mold heated to 380 ℃, by the heat conduction, temperature is controlled between 320 ℃-350 ℃ when making plate forming.Obviously, this technology power consumption is big, operation easier height, work under bad environment.The magnesium alloy product surface quality of punching press under hot conditions is poor, and product percent of pass is low, is difficult to satisfy the demand in market.Because the magnesium alloy thermal conductivity factor is big, the sheet material temperature is difficult to accurate control during punch forming, has further reduced the efficient of process implementing, causes production capacity low.And the mould hot soak condition except consuming energy, makes die wear quicken, and working life shortens dramatically, and more mold exchange will increase new cost input again, increase the processing cost of magnesium alloy plate, waste resource.
The patent No. is that 200720045596.2 patent has proposed a kind of metallic plate punching device; this device can address the above problem to a certain extent; but it imports sheet metal by punch-die or flange fixing installation-die with the high energy pulse electric current; owing to exist high energy pulse power supply two outputs to be directly connected in the problem of punch-die or flange fixing installation-die, thereby difficulty is applied to actual production.
[summary of the invention]
In order to overcome the above-mentioned defective that prior art exists, the utility model provides a kind of high-efficiency electroplastic punch molding device, establish dielectric film between its sheet metal and the die insulation, by a pair of arrangements of electric connection the high energy pulse electric current is applied to sheet metal with the flange fixing installation insulation, at room temperature can finish the Electroplastic of sheet metal synchronously handles and moulding, reduce the sheet metal forming temperature, improved product surface quality and product mechanical property, reduced the consumption of electric energy.
The utility model high-efficiency electroplastic punch molding device comprises punch, die, presses on a flange fixing installation on the die and a high energy pulse power supply in order to the sheet metal that will be stamped; Also comprise:
Two arrangements of electric connections, they are installed in the flange fixing installation both sides respectively, and insulate with flange fixing installation; Two arrangements of electric connections are connected to two outputs of described high energy pulse power supply; And,
One dielectric film is used for described sheet metal and die insulation; When matched moulds punching out sheet metal, the high energy pulse power supply imports pulse current to sheet metal by two arrangements of electric connections and carries out Electroplastic processing and moulding synchronously.
Described arrangements of electric connection comprises copper electrode and coats the insulation shell of copper electrode, the connecting rod that is used to connect the high energy pulse power supply is extended in the copper electrode outer face, arrangements of electric connection is embedded at flange fixing installation cross section on one side and is down in the trapezoidal containing cavity, and contact-making surface and flange fixing installation lower surface that being used to of copper electrode contacts described sheet metal flush.
Described arrangements of electric connection can comprise copper electrode and coat the insulation shell and the latch plate of copper electrode that the connecting rod that is used to connect the high energy pulse power supply is extended in the copper electrode outer face; It is in the containing cavity of T shape that arrangements of electric connection is embedded in flange fixing installation cross section on one side, latch plate is installed in the insulation shell of arrangements of electric connection and the flange fixing installation between the T shape containing cavity end face, and the contact-making surface that being used to of copper electrode contacts described sheet metal is lower than flange fixing installation lower surface 0.1-0.3mm.
Described arrangements of electric connection can also comprise copper electrode and insulating bar, insulating bar one end is fixed in the installing hole of flange fixing installation, copper electrode is installed on the through hole of the insulating bar other end, and the copper electrode hypomere is nested with the compression spring, and the epimere of copper electrode is the connecting portion that connects the high energy pulse power supply.
The utility model high-efficiency electroplastic punch molding device, between sheet metal and die, establish dielectric film, by a pair of arrangements of electric connection the high energy pulse electric current is applied to sheet metal with the flange fixing installation insulation, at room temperature can finish the Electroplastic of sheet metal synchronously handles and moulding, reduced the sheet metal forming temperature, improved product surface quality and product mechanical property, yield rate improves; And easy for installation, need not take any insulation measures at equipment side, safe in utilization, avoided the loss of electric energy on flange fixing installation and die, further improved the utilization rate of electric energy.
When metallic plate punching, directly apply the high energy pulse electric current, can improve the effect of migration duplet dislocation motion, make the sheet metal recrystallization temperature further reduce, can punch forming under lower temperature.The enhancing of Electroplastic effect effect makes the nucleation rate of dynamic recrystallization increase, and nuclei growth is prolonged, thereby obtains the crystal grain of refinement more, has increased substantially the mechanical property of product.
The utility model device is widely used in the Electroplastic of sheet metals such as magnesium alloy plate, aluminum alloy plate materials, copper coin material, all kinds of steel boards and handles and moulding.
[description of drawings]
Fig. 1 is embodiment 1 structural representation of the present utility model;
Fig. 2 is its high energy pulse power supply schematic diagram;
Fig. 3 a is the A-A broken section enlarged drawing of arrangements of electric connection and flange fixing installation joint portion among Fig. 1;
Fig. 3 b is the connecting rod part enlarged drawing of the copper electrode of arrangements of electric connection among Fig. 1;
Fig. 4 is that another embodiment of its arrangements of electric connection and this embodiment combine schematic diagram with flange fixing installation;
Fig. 5 is embodiment 2 structural representations of the present utility model;
Fig. 6 is that arrangements of electric connection the 3rd embodiment and this embodiment combine schematic diagram with flange fixing installation etc. among Fig. 5.
[specific implementation method]
Describe in detail below in conjunction with accompanying drawing.
Consult shown in Fig. 1-3, embodiment 1 high-efficiency electroplastic punch molding device comprises: punch 1, die 2, press on a flange fixing installation 3 and a high energy pulse power supply 7 on the die 2 in order to the sheet metal 5 that will be stamped; Also comprise two arrangements of electric connections 4, they are installed in flange fixing installation 3 both sides, and insulate with flange fixing installation 3; Two arrangements of electric connections 4 are connected to two outputs 71,72 of described high energy pulse power supply 7 respectively by cable; And a dielectric film 6, dielectric film 6 fill up between with described sheet metal 5 and die 2, are used to make both to insulate.The poly tetrafluoroethylene that described dielectric film 6 employing thickness are 0.01-0.03mm etc.
Shown in Fig. 3 a, b, arrangements of electric connection 4 among Fig. 1 comprises copper electrode 42 and coats the insulation shell 41 of copper electrode 42, the connecting rod 421 that is used to connect high energy pulse power supply 7 is extended in copper electrode 42 outer faces, arrangements of electric connection 4 is embedded at flange fixing installation 3 cross section on one side and is down in the trapezoidal containing cavity 31, and contact-making surface 425 and flange fixing installation 3 lower surfaces that being used to of copper electrode 42 contacts described sheet metal 5 flush.
Wherein, slot 423 is opened in connecting portion 421 ends of copper electrode 42, and is provided with bolt via hole 422, so that the cable of connecting band brace.During use, with the output wiring terminal and the copper electrode 42 of cable connection high energy pulse power supply 7, the slot 423 with on brace insertion copper electrode 42 connecting portions 421 of cable passes bolt via hole 422 fastening getting final product with bolt.
Vibration when preventing stamping press makes arrangements of electric connection 4 withdraw from from the containing cavity 31 of flange fixing installation 3, between containing cavity 31 end faces of the insulation shell 41 of arrangements of electric connection 4 and flange fixing installation 3 convex-concave snapping portion can be set.Wherein, 311 is some pits of containing cavity 31 end faces, and 411 is the projection that cooperates with this pit 311 that insulation shell 41 upper surfaces are provided with.
The insulation shell 41 of arrangements of electric connection 4 is to adopt SMC high-temperature insulation materials such as (Sheet Moulding Compound, i.e. sheet molding compounds) to make.Copper electrode 42 can form integral member by inserts Shooting Technique and SMC insulation shell 41, makes SMC insulation shell 41 coat copper electrode 42, and exposes the contact-making surface 425 that is used to contact described sheet metal 5.Convex-concave snapping portion 426,412 can be set between copper electrode 42 and SMC insulation shell 41.
In order to prolong arrangements of electric connection service life, improve reliability of electrical connection between copper electrode and the described sheet metal, the utility model provides Fig. 4 arrangements of electric connection another embodiment.This arrangements of electric connection comprises copper electrode 42, coats the insulation shell 41 and the latch plate 43 of copper electrode 42, and the connecting rod 421 that is used to connect high energy pulse power supply 7 is extended in copper electrode 42 outer faces; It is in the containing cavity 31 of T shape that arrangements of electric connection is embedded in flange fixing installation 3 cross section on one side, latch plate 43 is installed in the insulation shell 41 of arrangements of electric connection and the flange fixing installation 3 between T shape containing cavity 31 end faces, and the contact-making surface 425 that being used to of copper electrode 42 contacts described sheet metal 5 is lower than flange fixing installation 3 lower surface 0.1-0.3mm.Because latch plate 43 is provided with, flange fixing installation 3 compresses described sheet metal 5 on die the time, can realize that the reliable elasticity of arrangements of electric connection and described sheet metal 5 is electrically connected, the copper electrode wearing and tearing that can avoid hard repeatedly contact between the two to cause.
Fig. 5,6 is embodiment 2 structural representations of the present utility model.Embodiment 2 high-efficiency electroplastic punch molding devices comprise: punch 1, die 2, press on flange fixing installation 3 on the die 2 in order to the sheet metal 5 that will be stamped, high energy pulse power supply 7, be installed on the flange fixing installation 3 and with two arrangements of electric connections 4 of flange fixing installation 3 insulation, and, dielectric film 6, dielectric film 6 fills up between with described sheet metal 5 and die 2, is used to make both to insulate.
Wherein, arrangements of electric connection 4 adopts and has certain flexible the 3rd embodiment.This arrangements of electric connection comprises copper electrode 42 and insulating bar 41, insulating bar 41 1 ends are fixed in the installing hole of flange fixing installation 3, copper electrode 42 passes the through hole of insulating bar 41 other ends and installs by pad 45 and taper pin 44, the lower end of copper electrode 42 is spherical contact site 425, (being copper electrode 42 hypomeres) is nested with compression spring 43 between spherical contact site 425 and the insulating bar 41, the epimere of copper electrode 42 is a connecting portion 421, slot 423 and bolt via hole 422 are opened in these connecting portion 421 ends, so that the cable of connecting band brace.At contacting metal sheet material 5 states not, contact site 425 end faces of copper electrode 42 are a little less than flange fixing installation 3 lower surface 0.1-0.3mm.Because the setting of compression spring 43, flange fixing installation 3 compresses described sheet metal 5 on die 2 time, can realize that the reliable elasticity of arrangements of electric connection and described sheet metal 5 is electrically connected, the copper electrode wearing and tearing that can avoid hard repeatedly contact between the two to cause.Wherein insulating bar 41 is SMC insulating bars.
Above-mentioned arrangements of electric connection 4 slightly stretches out flange fixing installation 3 outsides, and respective metal sheet material 5 and dielectric film 6 also need slightly to reach above the concave template 2 ' of fixing die 2.
The utility model device is widely used in the Electroplastic of sheet metals such as magnesium alloy plate, aluminum alloy plate materials, copper coin material, steel board and handles and moulding.When the thick magnesium alloy plate of punching out 0.4-1.2mm, the high energy pulse power supply by the pulse current parameter that two arrangements of electric connections are applied to magnesium alloy plate is: the amplitude 10 of frequency 100-800Hz, pulse width 40-80 μ s, current density
3-10
5A/cm
2
Clearer for what the application process was understood, below in conjunction with Fig. 1-3 high-efficiency electroplastic punch molding device, the detailed process of the magnesium alloy sheet of 0.8mm being carried out Plastic Forming describes:
The first, two arrangements of electric connections 4 are connected to two outputs 71,72 of high energy pulse power supply 7 respectively by cable; Open high energy pulse power supply 7, the pulse signal parameter of regulating its output, frequency are that 100-600Hz, pulse width are 60 μ s;
The second, the magnesium alloy plate 5 that the bottom surface is closely posted dielectric film 6 is delivered on the die 2, and flange fixing installation 3 is depressed magnesium alloy plate 5, dielectric film 6 are flattened above die 2; Simultaneously, the contact-making surface 425 and the magnesium alloy plate 5 of the copper electrode 42 of two arrangements of electric connections 4 electrically contact, and the high energy pulse electric current is imported magnesium alloy plate 5, and wherein the amplitude of current density is 1500-5000A/cm
2
Three, control punch 1 is depressed with the speed of 5mm/s, and punch 1 continues at the uniform velocity to depress, and finishes until punching press, closes high energy pulse power supply 7;
Four, the moulding magnesium-alloy material is taken out in die sinking.
More existing drop stamping moulding process is compared, need not heat mould, and turn-on current just when punch contacting metal sheet material only, saved electric energy, simplified production technology, improved working environment.
Than aforementioned patent number is 200720045596.2 device, safe in utilization, has avoided the loss of electric energy on flange fixing installation and die, has further improved the utilization rate of electric energy.Increase the current density that acts on the sheet metal, thereby improved the effect of migration duplet dislocation motion, made the sheet metal recrystallization temperature further reduce, can punch forming under lower temperature.The enhancing of Electroplastic effect effect makes the nucleation rate of dynamic recrystallization increase, and nuclei growth is prolonged, thereby obtains the crystal grain of refinement more, increases substantially the mechanical property of product.
Claims (9)
1. a high-efficiency electroplastic punch molding device comprises punch, die, presses on a flange fixing installation on the die and a high energy pulse power supply in order to the sheet metal that will be stamped; It is characterized in that also comprising:
Two arrangements of electric connections, they are installed in the flange fixing installation both sides respectively, and insulate with flange fixing installation; Two arrangements of electric connections are connected to two outputs of described high energy pulse power supply; And,
One dielectric film is used for described sheet metal and die insulation; When matched moulds punching out sheet metal, the high energy pulse power supply imports pulse current to sheet metal by two arrangements of electric connections and carries out Electroplastic processing and moulding synchronously.
2. high-efficiency electroplastic punch molding device as claimed in claim 1, it is characterized in that: described arrangements of electric connection comprises copper electrode and coats the insulation shell of copper electrode, the connecting rod that is used to connect the high energy pulse power supply is extended in the copper electrode outer face, arrangements of electric connection is embedded at flange fixing installation cross section on one side and is down in the trapezoidal containing cavity, and contact-making surface and flange fixing installation lower surface that being used to of copper electrode contacts described sheet metal flush.
3. high-efficiency electroplastic punch molding device as claimed in claim 2 is characterized in that: convex-concave snapping portion is set between the containing cavity end face of the insulation shell of described arrangements of electric connection and flange fixing installation.
4. high-efficiency electroplastic punch molding device as claimed in claim 1 is characterized in that: described arrangements of electric connection comprises copper electrode and coats the insulation shell and the latch plate of copper electrode that the connecting rod that is used to connect the high energy pulse power supply is extended in the copper electrode outer face; It is in the containing cavity of T shape that arrangements of electric connection is embedded in flange fixing installation cross section on one side, latch plate is installed in insulation shell and the flange fixing installation between the T shape containing cavity end face, and the contact-making surface that being used to of copper electrode contacts described sheet metal is lower than flange fixing installation lower surface 0.1-0.3mm.
5. as claim 2 or 4 described high-efficiency electroplastic punch molding devices, it is characterized in that: described insulation shell is the SMC insulation shell.
6. high-efficiency electroplastic punch molding device as claimed in claim 1, it is characterized in that: described arrangements of electric connection comprises copper electrode and insulating bar, insulating bar one end is fixed in the installing hole of flange fixing installation, copper electrode is installed on the through hole of the insulating bar other end, and the copper electrode hypomere is nested with the compression spring, and the epimere of copper electrode is the connecting portion that connects the high energy pulse power supply.
7. high-efficiency electroplastic punch molding device as claimed in claim 6 is characterized in that: described insulating bar is the SMC insulating bar.
8. high-efficiency electroplastic punch molding device as claimed in claim 1 is characterized in that: used dielectric film is a poly tetrafluoroethylene between described die and the sheet metal.
9. as claim 1 or 8 described high-efficiency electroplastic punch molding devices, it is characterized in that: described insulator film thickness is 0.01-0.03mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201340448U CN201552232U (en) | 2009-07-21 | 2009-07-21 | Efficient electro-plastic punch forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201340448U CN201552232U (en) | 2009-07-21 | 2009-07-21 | Efficient electro-plastic punch forming device |
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| Publication Number | Publication Date |
|---|---|
| CN201552232U true CN201552232U (en) | 2010-08-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201340448U Expired - Lifetime CN201552232U (en) | 2009-07-21 | 2009-07-21 | Efficient electro-plastic punch forming device |
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| CN (1) | CN201552232U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102527830A (en) * | 2012-02-09 | 2012-07-04 | 上海交通大学 | Electroplastic incremental forming device and method for plates |
| CN102886439A (en) * | 2012-09-28 | 2013-01-23 | 蚌埠市昊业滤清器有限公司 | Modifying mould for shell after stretch forming |
| CN103846329A (en) * | 2012-11-30 | 2014-06-11 | 通用汽车环球科技运作有限责任公司 | Roller edge curling |
| WO2022170701A1 (en) * | 2021-02-09 | 2022-08-18 | 上海交通大学 | Electrically assisted forming device and process for fuel cell metal plate |
-
2009
- 2009-07-21 CN CN2009201340448U patent/CN201552232U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102527830A (en) * | 2012-02-09 | 2012-07-04 | 上海交通大学 | Electroplastic incremental forming device and method for plates |
| CN102527830B (en) * | 2012-02-09 | 2014-04-16 | 上海交通大学 | Electroplastic incremental forming device and method for plates |
| CN102886439A (en) * | 2012-09-28 | 2013-01-23 | 蚌埠市昊业滤清器有限公司 | Modifying mould for shell after stretch forming |
| CN102886439B (en) * | 2012-09-28 | 2014-09-17 | 蚌埠市昊业滤清器有限公司 | Modifying mould for shell after stretch forming |
| CN103846329A (en) * | 2012-11-30 | 2014-06-11 | 通用汽车环球科技运作有限责任公司 | Roller edge curling |
| CN103846329B (en) * | 2012-11-30 | 2017-03-01 | 通用汽车环球科技运作有限责任公司 | Roller crimping |
| WO2022170701A1 (en) * | 2021-02-09 | 2022-08-18 | 上海交通大学 | Electrically assisted forming device and process for fuel cell metal plate |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100818 Effective date of abandoning: 20090721 |