CN102941253B - Component assembly method and device based on electromagnetic auxiliary forming - Google Patents
Component assembly method and device based on electromagnetic auxiliary forming Download PDFInfo
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- CN102941253B CN102941253B CN201210476054.6A CN201210476054A CN102941253B CN 102941253 B CN102941253 B CN 102941253B CN 201210476054 A CN201210476054 A CN 201210476054A CN 102941253 B CN102941253 B CN 102941253B
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000003068 static effect Effects 0.000 claims abstract description 20
- 239000003990 capacitor Substances 0.000 claims description 12
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 238000009825 accumulation Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 5
- 229910052751 metal Inorganic materials 0.000 abstract description 5
- 239000002184 metal Substances 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000002940 repellent Effects 0.000 abstract 1
- 239000005871 repellent Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 7
- 238000007493 shaping process Methods 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000001939 inductive effect Effects 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 229910021502 aluminium hydroxide Inorganic materials 0.000 description 1
- 229940024545 aluminum hydroxide Drugs 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920000768 polyamine Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Landscapes
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention discloses a component assembly method and a device based on electromagnetic auxiliary forming and belongs to the technical field of bent metal sheets. A press ram provides static pressure for inner and outer components which are stacked up and down to enable the outer component to be bent vertically for 90 degrees, and dynamic loads which exert pulse currents to a coil to produce magnetic force are exerted on a bent portion of the outer component, so that the outer component surface produces induced currents and an induced magnetic field opposite to a coil magnetic field through the act of the magnetic force to produce electromagnetic force which is repellent to the coil and larger than the yield strength of the outer component, the outer component is bent towards the inner component for 45 degrees, and the outer component is pressed to the inner component by a male die to achieve tight attaching. According to the component assembly method and the device, electromagnetic auxiliary forming is used to achieve metal plate material deformation, the forming limit of metal plate materials can be improved greatly, loaded advantages of static force and dynamic force combination are used, so that plate assembly is achieved by a pair of dies, and materials can be saved; die service lives are increased; the manufacture time of components is decreased, and the production efficiency is improved; mechanical properties of the manufactured components are improved; and green and environmental protection requirements are met.
Description
Technical field
What the present invention relates to is a kind of method of crooked metal sheet technical field, specifically a kind of component assembling method based on electromagnetism assist formation and device.
Background technology
When two part exterior parts and inner part are fitted to each other, one of them part needs bending.The assembly method that such as automobile decoration panel part is traditional comprises two stages: first bending forming 90 ° as shown in Fig. 1 left-half, then bends to 180 ° again as shown in Fig. 1 right half part.Now, crooked part assembly process or be out of shape in a mold, or use roller flattening-out as shown in Figure 2.
These methods above-mentioned each have oneself pluses and minuses.Such as, need to apply very large power to overcome the slip of part counter roller.In addition, conventional equipment always can not realize roll, because single wheel rolls auxiliary equipment set up uneven radial load, this power can damage machine tool component.Design and manufacture equipment, flattening-out technique need long-time, must adopt special plane, productivity ratio be lowly rolling assembling common disadvantage.
Through finding the retrieval of prior art, Chinese patent literature 102248059A publication date 2011-11-23, describe a kind of multistage multi-directional electromagnetic forming method, this technology adopts quasi-steady state electric current to set up stabilizing magnetic field region, pulse current is utilized to produce inductive loop within the workpiece, electromagnetic force between inductive loop and pulse current is ordered about workpiece and is positioned at the part of die outside to the Direction distortion away from die, and workpiece is positioned at the part of die inside to the Direction distortion near die, when the portion deforms of die inside is to stabilizing magnetic field region, inductive loop effect in stabilizing magnetic field and workpiece is ordered about workpiece accelerated motion and to be fitted die, complete shaping.But the defect of this technology is: owing to adopting " multistage multi-directional electromagnetic forming method " to cause electro-magnetic forming equipment too complicated, be difficult to apply.
Summary of the invention
The present invention is directed to prior art above shortcomings, a kind of component assembling method based on electromagnetism assist formation and device are provided, the dead load that the dynamic loading provided by electro-magnetic forming and forcing press provide is used for the shaping fit on of two parts dexterously, abandons conventional multiple working procedure, overpays the assembling of the poor efficiency of mould.Do not need more mold exchange in the invention process process, the bending assembling of inner part and exterior part can be realized simply and easily in a secondary mould.
The present invention is achieved by the following technical solutions:
The invention provides a kind of component assembling method based on electromagnetism assist formation, by press ram first to upper, in lower overlap, exterior part provides static pressure to make exterior part vertical curve 90 °, then pass through in coil, apply the dynamic loading that pulse current produces magnetic force to the sweep of exterior part, exterior part surface is made to produce induced-current and the Induced magnetic field contrary with coil magnetic field direction by magneticaction, thus produce and to repel each other with coil, be greater than exterior part yield strength electromagnetic force, make its inside component flexes 45 °, finally by punch, exterior part is pressed to inner part, realization fits tightly.
Described static pressure be act on inner part and exterior part upper and lower to mechanicals efforts.
The invention provides a kind of assembling parts device based on electromagnetism assist formation, comprise: for spacing static(al) force application mechanism and the power applying mechanism with magnetic-inductive device, wherein: static(al) force application mechanism and press top shoe are rigidly connected, inner part to be assembled and exterior part are arranged in static(al) force application mechanism, and power applying mechanism is symmetricly set in the both sides of exterior part.
Described static(al) force application mechanism comprises: punch case, punch and knock-pin, wherein: punch is arranged in punch case and both are positioned at the top of inner part, and knock-pin is positioned at the below of exterior part.
Be provided with elastic parts between described punch and punch case, with realize technique terminate after punch-punch case be separated, guarantee that inner part and exterior part fit tightly simultaneously.
Described elastic parts is air pressure assembly, hydraulic member or mechanical spring packs.
Described magnetic-inductive device is arranged in power applying mechanism and just to exterior part, the upper end of magnetic-inductive device and the upper plane of power applying mechanism are positioned at same plane.
Described magnetic-inductive device comprises: coil and charge-discharge circuit, wherein: coil is arranged on the both sides of exterior part, coil is connected with charge-discharge circuit, this charge-discharge circuit comprises: step-up transformer, rectifier, charging resistor, capacitor and discharger, wherein: 220V or 380V alternating current inputs after step-up transformer and rectifier carry out boosting rectification successively after frequency conversion, be converted into high voltage direct current through charging resistor to charge to capacitor, after capacitor accumulation of energy reaches predetermined value, connect discharger produce By Impulsive Current to coil instantaneous relase, even strong pulsed magnetic field is produced around coil, magnetic field makes the surface of the exterior part with electric conductivity produce induced-current and the Induced magnetic field contrary with coil magnetic field direction.
The present invention's utilize electromagnetic force to realize forming limit that sheet metal deformation can increase substantially plate, electro-magnetic forming maximum strain is common shaping 3 times.
The advantageous that the present invention uses static(al) educational level and dynamics composition to load exists: save material; Complete assembling only using under a secondary mould; Reduce active force under static load conditions; Owing to shortening the manufacturing time of part, reduce and manufacture work step, thus improve labor productivity; Improve the mechanical property of manufactured part.Electromagnetic forming technique has the features such as machining energy is easy to accurate control, forming speed is fast, Forming Workpiece precision is high, shaping dies is simple and die life is long, equipment interoperability is strong.And whole forming process is green, environmental protection.Now be widely used in the numerous areas such as machinery, electronics, auto industry, Aero-Space, weapon industry, application prospect is very wide.
Accompanying drawing explanation
Fig. 1 is the flow chart be shaped in mould in prior art:
In figure: left figure is curved in 90 °, and right figure curves 180 °.
Fig. 2 is the flow chart using roller flattening-out to be shaped in prior art.
Fig. 3 is example structure schematic diagram:
In figure: a is original state schematic diagram; B is using state schematic diagram.
Fig. 4 is power applying mechanism schematic diagram.
Fig. 5 is close-up schematic view in Fig. 3;
In figure: a is exterior part original state schematic diagram; B is end-state schematic diagram.
Fig. 6 is the Principal strain ratio comparatively schematic diagram of the present invention's manufacturing process unlike the prior art;
In figure: be 1. electromagnetic forming method; 2. be common forming process.
Detailed description of the invention
Elaborate to embodiments of the invention below, the present embodiment is implemented under premised on technical solution of the present invention, give detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment 1
As shown in Figure 3 a and Figure 3 b shows, the present embodiment comprises: for spacing static(al) force application mechanism 1 and the power force application mechanism 2 with magnetic-inductive device 9, wherein: static(al) force application mechanism 1 and press top shoe are rigidly connected, inner part 3 to be assembled and exterior part 4 are arranged in static(al) force application mechanism 1, and power force application mechanism 2 is symmetricly set in the both sides of exterior part 4.
Described static(al) force application mechanism 1 comprises: punch case 5, punch 6 and knock-pin 7, wherein: punch 6 is arranged in punch case 5 and both are positioned at the top of inner part 3, and knock-pin 7 is positioned at the below of exterior part 4.
Described elastic parts 8 adopts mechanical spring packs to realize.
As shown in Figure 4, described magnetic-inductive device 9 to be arranged in power force application mechanism 2 and just to exterior part 4, the upper end of magnetic-inductive device 9 and the upper plane of power force application mechanism 2 are positioned at same plane.
Described magnetic-inductive device 9 comprises: coil M and charge-discharge circuit, wherein: coil M is arranged on the both sides of exterior part 4, coil M is connected with charge-discharge circuit, this charge-discharge circuit comprises: step-up transformer T, rectifier D, charging resistor R, capacitor C and discharger k, wherein: 220V or 380V alternating current inputs after step-up transformer T and rectifier D carries out boosting rectification successively after frequency conversion, be converted into high voltage direct current through charging resistor R to charge to capacitor C, after capacitor C accumulation of energy reaches predetermined value, connect discharger k produce By Impulsive Current to coil M instantaneous relase, even strong pulsed magnetic field is produced around coil M, magnetic field makes the surface of the exterior part with electric conductivity produce induced-current and the Induced magnetic field contrary with coil M magnetic direction.
The rated voltage 20kV of described capacitor C, capacitance 1100 μ F.
Described release time is 10
-3s/ time.
Described power end has high-voltage capacitance, capacitance 1100 μ F.
As shown in Figure 3 and Figure 5, device is contained on TZP-400 type hydraulic drawing press, two pieces of inner parts 3 to be assembled and exterior part 4 are inserted in mould, when hydraulic drawing press slide block down, drive punch 6 descending, hydrostatic pressure is imposed to inner part 3 and exterior part 4, and exterior part 4 stretch in 90 ° after, slide block drives punch 6 backhaul; But because the elastic force of elastic parts 8 is applied on punch 6, make punch 6 be separated with punch case 5 and inner part 3 and exterior part 4 be pushed down; Now, magnetic inductor connects AC power 380v, produces magnetic force, exterior part 4 inward at both ends is made to bend to 45 °, deenergization, hydraulic drawing press slide block down, drive punch case 5 to be pressed on inner part 3 by curved exterior part 4 at 45 °, realize inner part 3 and exterior part 4 combination assembling.The backhaul of hydraulic drawing press slide block, knock-pin 7 ejects sub-assembly.Like this, a manufacturing cycle is completed.Subsequently, then repeat this step.Realize a press, a secondary mould complete workpiece assembling.
Be be the vitals that magnetic field energy makes workpiece deformation by electric energy conversion due to coil, its structural design directly affects the forming effect quality of workpiece, the height of forming efficiency, the length in coil service life.The structure of the coil that differing formed technique adopts varies, and is the key point of efficient application electromagnetic forming technique in conjunction with the coil that workpiece deformation feature is reasonable in design.The shape of coil is different, and the deformation extent of blank various piece is not identical yet, because the distribution situation being supplied to the electromagnetic force needed for blank deformation is determined by the structure of coil.
Coil M in the present embodiment is flat rectangular plate helical coil structure, and centre is close around rectangle, and turn-to-turn is apart from less, and bending part has round-corner transition; The wire that coil adopts is by the uniform press coil of red copper glass envelope curve coiling, and its working face is plane, is applicable to the electro-magnetic forming of flat part.
Described wire adopts that epoxy resin is main stuffing, polyethylene polyamine is curing agent, aluminium-hydroxide powder is that hardening constituent is mixed well cast and formed, and solidification in an oven with the temperature 4 hours of 80 DEG C in atmosphere after cast, to ensure the intensity of resin.Can resist the interaction force of each turn-to-turn and the reaction force of plate preferably by the coil after cast, the intensity that improve coil to a certain extent extends the service life of coil.
As shown in Figure 6, for 6061-T4 aluminum alloy plate materials, the Principal strain ratio of the present embodiment manufacturing process unlike the prior art is comparatively illustrated, as seen in FIG., electro-magnetic forming maximum strain is common shaping 3 times, and electro-magnetic forming ability of the present invention and efficiency are higher than other manufacturing process.
Claims (5)
1. the assembling parts device based on the component assembling method of electromagnetism assist formation, it is characterized in that, comprise: for spacing static(al) force application mechanism and the power applying mechanism with magnetic-inductive device, wherein: static(al) force application mechanism and press top shoe are rigidly connected, inner part to be assembled and exterior part are arranged in static(al) force application mechanism, and power applying mechanism is symmetricly set in the both sides of exterior part;
Described magnetic-inductive device comprises: coil and charge-discharge circuit, wherein: coil is arranged on the both sides of exterior part, coil is connected with charge-discharge circuit, this charge-discharge circuit comprises: step-up transformer, rectifier, charging resistor, capacitor and discharger, wherein: 220V or 380V alternating current inputs after step-up transformer and rectifier carry out boosting rectification successively after frequency conversion, be converted into high voltage direct current through charging resistor to charge to capacitor, after capacitor accumulation of energy reaches predetermined value, connect discharger produce By Impulsive Current to coil instantaneous relase, even strong pulsed magnetic field is produced around coil, magnetic field makes the surface of the exterior part with electric conductivity produce induced-current and the Induced magnetic field contrary with coil magnetic field direction, this assembling parts device first provides static pressure to make exterior part vertical curve 90 ° to the inside and outside parts of upper-lower overlapping by press ram, then the sweep of exterior part is applied through and applies the dynamic loading that pulse current produces magnetic force in coil, exterior part surface is made to produce induced-current and the Induced magnetic field contrary with coil magnetic field direction by magneticaction, thus produce with coil repel each other, be greater than exterior part yield strength electromagnetic force, make its inside component flexes 45 °, finally by punch case, exterior part is pressed to inner part, realize fitting tightly,
Described static(al) force application mechanism comprises: punch case, punch and knock-pin, wherein: punch is arranged in punch case and both are positioned at the top of inner part, and knock-pin is positioned at the below of exterior part;
Be provided with elastic parts between described punch and punch case, with realize technique terminate after punch-punch case be separated, guarantee that inner part and exterior part fit tightly simultaneously;
Described magnetic-inductive device is arranged in power applying mechanism and just to exterior part, the upper end of magnetic-inductive device and the upper plane of power applying mechanism are positioned at same plane.
2. device according to claim 1, is characterized in that, described static pressure be act on inner part and exterior part upper and lower to mechanicals efforts.
3. device according to claim 1, is characterized in that, described elastic parts is air pressure assembly, hydraulic member or mechanical spring packs.
4. device according to claim 1, is characterized in that, the rated voltage 20kV of described capacitor, capacitance 1100 μ F.
5. device according to claim 4, is characterized in that, the release time of described capacitor is 10
-3s/ time.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210476054.6A CN102941253B (en) | 2012-11-21 | 2012-11-21 | Component assembly method and device based on electromagnetic auxiliary forming |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210476054.6A CN102941253B (en) | 2012-11-21 | 2012-11-21 | Component assembly method and device based on electromagnetic auxiliary forming |
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| CN102941253A CN102941253A (en) | 2013-02-27 |
| CN102941253B true CN102941253B (en) | 2015-02-04 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103191971A (en) * | 2013-04-01 | 2013-07-10 | 哈尔滨工业大学 | Electromagnetism-assisted forming device and method for dissimilar metal composite boards |
| CN103480709A (en) * | 2013-09-09 | 2014-01-01 | 大连理工大学 | Pulse electromagnetic device for assisting line heating |
| CN106563722A (en) * | 2015-10-09 | 2017-04-19 | 沈阳俊吉科技有限公司 | Suction electromagnetic forming method and device |
| CN108405699A (en) * | 2018-04-02 | 2018-08-17 | 三峡大学 | A kind of the plate electromagnetism hemmer and method of vertical repulsive force-radial direction suction timesharing load |
| CN112719022B (en) * | 2020-12-14 | 2022-11-18 | 三峡大学 | Auxiliary electromagnetic forming device and method for coil surrounding plate |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102512756A (en) * | 2011-12-06 | 2012-06-27 | 何宗彦 | Method and equipment for generating high-voltage pulse induction currents in object |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7263757B2 (en) * | 2004-04-15 | 2007-09-04 | General Motors Corporation | Electromagnetic trimming, flanging and hemming apparatus and method |
| US7290318B2 (en) * | 2004-04-15 | 2007-11-06 | General Motors Corporation | Electromagnetic flanging and hemming apparatus and method |
| JP5111911B2 (en) * | 2007-03-23 | 2013-01-09 | 本田技研工業株式会社 | Hemming processing method and panel assembly manufacturing method |
| US7918118B2 (en) * | 2008-05-05 | 2011-04-05 | Ford Global Technologies, Llc | Method of using an electromagnetic forming machine to hem a plurality of panels to form a panel assembly |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102512756A (en) * | 2011-12-06 | 2012-06-27 | 何宗彦 | Method and equipment for generating high-voltage pulse induction currents in object |
Non-Patent Citations (1)
| Title |
|---|
| "MF-16K型电磁成形机的研制及其应用";陈志强等;《第八届全国电加工学术年会论文集》;19970831;第433-439页 * |
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