CN103894472B - A kind of compound bellows based on electromagnetic forming technique and building mortion thereof - Google Patents
A kind of compound bellows based on electromagnetic forming technique and building mortion thereof Download PDFInfo
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Abstract
The invention discloses a kind of compound bellows building mortion of electro-magnetic forming, it is characterized in that: comprise rectifier (1), resistance (2), switch (3), capacitor (4), step-up transformer (5), upper mounted plate (6), set bolt (7), briquetting (8), mould bases (9), constraint mould (11), coil (12), bottom plate (13), T-shaped platform (14), trapezoidal hole (15), steam vent (16), holddown groove (17), wire guide (18), manufacturing procedure of the present invention is few, working (machining) efficiency is high, forming accuracy is high, its pipe fitting forming speed is exceedingly fast, pipe fitting can be made to be shaped under high strain-rate, owing to being Large strain deformation process, may be used for the shaping of the difficult deformable metal material of conventional method, greatly improve the plasticity of metal material, increase substantially the yield strength of material.Can retrain mould shape by changing in mould, form different waveforms, its processing flexibility is large.
Description
Technical field
The present invention relates to a kind of metal composite bellows forming technique, particularly relate to a kind of energy-absorbing compound bellows based on electro-magnetic forming principle and building mortion thereof.
Background technology
Electro-magnetic forming is a kind of high energy, the two-forty forming technique that utilize metal that plastic deformation occurs by electromagnetic force in strong pulsed magnetic field.Electro-magnetic forming has the ability of the plastic deformation improving material, and magnetic pulse formation utilizes magnetic field force, instead of utilize mechanical force to realize processing to metal, therefore do not need in forming process that power transmission medium, forming process are stable, production efficiency is high, energy is easy to control.General electro-magnetic forming requires that the resistivity of workpiece is lower than 0.15 μ Ω m, is applicable to the processing of the high material of the electric conductivity such as aluminium, copper and alloy thereof very much.It is short that the key character of electro-magnetic forming is exactly the fault offset time, inertia force plays a major role in forming process, movement velocity during workpiece deformation can reach 50m/s-300m/s, explosive forming is similar to the short and speed high this point of deformation time, therefore it also shows the such superplasticity of explosive forming, therefore compared with conventional manufacturing process, electro-magnetic forming can increase substantially the plastic deformation ability of material.In electro-magnetic forming, due to Electromagnetic bulging discharge time of short duration (Microsecond grade), pipe fitting can complete distortion at Millisecond, and strain rate can reach 10
3s
-1, metal thin-wall pipe is shaped under high strain rate, and yield strength can significantly improve, and therefore utilizes electromagnetic forming technique can significantly improve the energy absorption efficiency of metal tube after bulging.
Metal composite light-wall pipe is the light-wall pipe be combined into by some distortion and interconnection technique by the metal of multiple material type not of the same race.Metal thin-wall pipe fitting is made up of homogenous material traditionally, and under specific occasion, the metal thin-wall pipe of single kind can not meet the demands.Such as when automobile collides, single aluminium alloy thin-walled pipe well can not absorb the energy that collision produces, easily passenger is damaged, reduce the security of running car, and single thin-wall steel tube quality is very large, reduce the economy of running car to a certain extent, the requirement of automotive light weight technology can not be met.Metal composite thin-wall circular tube can alleviate quality when ensureing energy-absorbing effect, has good economic benefit.The intensity of thin-wall steel tube is large, but electric conductivity does not have aluminium alloy thin-walled running well, the dilation dimension met the demands can not be reached easily when carrying out electromagnetism expansion, the good conductivity of aluminium alloy thin-walled pipe, and quality is light, be applicable to driving the thin-wall pipe not easily passing through electromagnetic forming technique to be radially expanded, improve its plasticity.Wavy metal thin-wall circular tube is owing to there being the existence of crest and trough, when carrying out axial conquassation, trough produces depression, can bring out progressive folding, folding mode when precisely can control thin-wall pipe conquassation with this, folding region is more, and energy-absorbing effect is better, and the energy-absorbing effect of bellows is better than non-bellows.
Common metal thin-wall corrugated tube is made up of single metal material, and the metal thin-wall pipe of single kind can not meet instructions for use well, the aluminium-alloy pipe intensity as single is not high, and energy-absorbing effect is bad, single high strength steel quality is too large, can not meet lightweight requirements.Existing metal composite pipe complicate fabrication process, the assembled arrangement of pipe fitting requires many.As composite pipe production method in patent application 201210495953.0, outer tube heats, and interior pipe is applied on guide pipe, then makes it be shaped with hydraulic pressure, and its manufacturing process of its metal composite pipe is complicated, and molding condition requires high.The processing and manufacturing of the bellows of prior art adopts hydroforming, roll forming, mechanical bulging, welding forming etc. usually, and its forming efficiency is low, complex procedures.As the manufacture method of metal bellows in patent application 201210595118.X, first heat pipe fitting, then in pipe fitting, be filled with liquid, expand, needed for its process, conditional request is high, and operating mode is complicated.As the manufacture method of metal bellows in Chinese patent application 200710302010.0, first exert pressure at arranged at inner side of pipe fitting, make it swell and form snake abdomen shape projection, recycling rolling and processing forms corrugated tube, and its process is complicated, can not be once-forming.Therefore, a kind of Double-metal combined corrugated pipe manufacturing process is needed to solve above-mentioned problem.
Summary of the invention
The object of this invention is to provide a kind of high strength based on electro-magnetic forming principle, lightweight, predeformation composite bimetal pipe manufacturing process that energy-absorbing effect is good, there is provided a kind of device utilizing electro-magnetic forming principle processing metal compound bellows and the metal composite energy-absorbing bellows utilizing this manufacturing process to obtain, the design for thin-walled metal member energy absorption device provides new method.In shaping dies provided by the present invention, by electromagnetic forming technique, metal composite pipe is radially expanded, outer tube is driven by interior pipe during expansion, make the interior pipe of metal composite pipe carry out subsides mould according to predetermined constraint mould shape together with outer tube, after making expansion, the dilation of metal composite pipe has certain corrugated regular shape.
To achieve these goals, the technical solution used in the present invention there is provided a kind of compound bellows building mortion of electro-magnetic forming, it is characterized in that: rectifier, resistance, switch, capacitor, step-up transformer, upper mounted plate, set bolt, briquetting, mould bases, constraint mould, coil, bottom plate, T-shaped platform, trapezoidal hole, steam vent, holddown groove, wire guide, wherein:
Upper mounted plate arranges holddown groove, for connecting mould bases, and is fixed mould bases, and arrange a wire guide in the middle of upper mounted plate, for drawing the electric wire of coil, and there are equally distributed four through holes at flange periphery place, for the connection of set bolt;
Uniform four through holes of bottom plate edge, being connected and fixed for bolt;
Briquetting center arranges the wire guide with upper mounted plate same diameter, for importing and the derivation of coil wire;
The constraint membrane module of metal composite pipe is that semicircular constraint mould 11 is put together by cross section, vertical axis direction, and have equally distributed three steam vents in the Baltimore groove of each constraint mould; Constraint mould can arrange some arc grooves;
The inner circle of upper mounted plate put into by briquetting, metal composite pipe is placed on T-shaped platform, and be in the inner circle of upper mounted plate and bottom plate, metal composite pipe is subject to the constraint of briquetting and T-shaped platform, can not move, coil is enclosed within T-shaped platform, and metal composite pipe is in constraint mould, and when expanding, constraint mould carries out radial constraint to it; Mould bases is clamped constraint mould and is fixed it; Four set bolts insert from the trapezoidal hole of four bottom bottom plate, and pass from upper mounted plate flange periphery four through holes and fix, make upper mounted plate push down briquetting and mould bases downwards, briquetting is exerted pressure to metal composite pipe and coil;
Rectifier will voltage commutation be DC voltage after step-up transformer raises, and after resistance, DC voltage charges to capacitor, and when switch closed moment, couple capacitors coil discharges.
Further, when pasting mould for metal composite tube swelling, the gas between constraint mould and pipe fitting can be discharged by steam vent in time.
Further, the external diameter of briquetting is consistent with the interior circular diameter of upper mounted plate, and bottom corresponding T-shaped platform, external diameter is consistent with circular diameter in bottom plate.
Further, coil adopts 5mm × 7mm rectangle red copper wire to carry out spiral winding, adopts insulating tape to isolate, copper cash outer application epoxy resin and coagulating agent between copper cash, and ratio is 1:2 mixing, solidifies rear outer rim turnery processing to the size needed.
Present invention also offers a kind of method utilizing the compound bellows building mortion processing compound bellows of electro-magnetic forming, it is characterized in that comprising the steps:
Step 1, choose the inner and outer tubes of metal composite bellows to be processed;
Step 2, by the outer tube sleeve chosen on inner pipe;
Step 3, metal composite pipe is put into shaping dies;
Step 4, alternating voltage to be boosted by step-up transformer;
Step 5, after boosting transformation, electric current, by after rectifier, becomes direct current, and in the effect charge circuit of resistance, electric current reduces, and DC voltage charges to capacitor;
Step 6, closed circuit switch, make capacitor discharge; Curent change in induction coil, produce induced field, and induced field is to metal composite pipe generation effect, makes to produce induced-current in metal composite pipe.
Induced-current in step 7, metal composite pipe produces secondary induction magnetic field, and secondary induction magnetic field and the induced field that coil produces because direction is identical, produce magnetic field pressure at metal composite inside pipe wall place.
The inwall of step 8, coil place metal composite pipe is subject to magnetic field pressure and radial plastic expansion occurs; Because interior pipe electric conductivity is better than outer tube, its electromagnetic force be subject to is larger than high tensile steel tube, and speed of expansion is also faster, when expanding by the driving of interior pipe, outer tube is expanded with interior pipe.
When the interior pipe of step 9, metal composite pipe drives outer tube to expand together, under the effect of constraint mould, produce crest and trough, become compound bellows;
After step 10, expansion process terminate, unclamp set bolt, from mould, take out the metal composite bellows after being shaped.
Further, the interior pipe of metal composite pipe can select the metal material that the good conductivity such as aluminium alloy, quality are light, and outer tube can select thin-wall steel tube.
Further, metal composite pipe upon inflation, can not rotate between interior pipe and outer tube, can not move axially.
Present invention also offers a kind of compound bellows, the compound bellows building mortion of its electro-magnetic forming of the present invention processes.
Present invention also offers a kind of compound bellows, it adopts the method for processing compound bellows of the present invention to process.
Beneficial effect of the present invention is:
(1) compared with the method such as hydroforming, mechanical bulging, compound bellows manufacturing process based on electro-magnetic forming principle used in the present invention, manufacturing procedure is few, and working (machining) efficiency is high, and forming accuracy is high, its pipe fitting forming speed is exceedingly fast, pipe fitting can be made to be shaped under high strain-rate, owing to being Large strain deformation process, to may be used for the shaping of the difficult deformable metal material of conventional method, greatly improve the plasticity of metal material, increase substantially the yield strength of material.Can retrain mould shape by changing in mould, form different waveforms, its processing flexibility is large.
(2) processing unit (plant) of compound bellows provided by the present invention, the existence of constraint mould during owing to expanding, the degrees of expansion of metal composite pipe can precisely be controlled, metal composite pipe can be made to have predetermined corrugated inflated configuration upon inflation, precisely can control the position of metal composite pipe dilation, crest size and quantity by changing constraint mould.
(3) compound bellows obtained based on the method provided by the present invention, the electric conductivity of the interior pipe of metal composite pipe is than the good conductivity of outer tube, and when expanding, the electromagnetic force that interior pipe is subject to is larger than outer tube, and interior pipe drives outer tube dilatancy together.Carry out electromagnetism expansion phase with the outer tube of single poorly conductive to compare, the plasticity of metal composite pipe provided by the invention in electro-magnetic forming is better.
(4) compound bellows obtained based on the method provided by the present invention, expansion-molded under high strain-rate, the yield strength of its material significantly improves, energy is absorbed effective when being subject to axial and radial conquassation, compared with non-bellows, can bring out progressive folding during the axial conquassation of metal composite bellows, accurately control folding mode, improve its energy absorbing efficiency.
(5) compound bellows obtained based on the method provided by the present invention, in it, pipe is the metal tube of the good conductivity such as aluminium alloy, and outer tube is high tensile steel tube.Compared with single aluminium-alloy pipe, its intensity is higher, and energy-absorbing effect is better.Compared with single high tensile steel tube, its quality is lighter, more meets light-weighted requirement.
(6) shaping dies provided by the present invention is made up of upper bottom plate, briquetting, bucking ladder, constraint mould, mould bases, bolt etc.Metal composite pipe, in constraint mould, is radially expanded by electromagnetic action, owing to retraining the existence of mould, playing the effect of constraint pipe fitting, can control the degrees of expansion of metal composite pipe, and make dilation have predetermined regular shape with this when expanding.
(7) the constraint mould in shaping dies provided by the present invention can have and have multiple groove simultaneously.Accordingly, metal composite pipe upon inflation, multiple bossing will be there will be, crest and trough is there is between each bossing, the all well-regulated profile of tool, therefore, by changing shape and the quantity of constraint mould further groove, the crest size of Double-metal combined corrugated pipe, shape and quantity can accurately be controlled.
(8) the present invention can make metal composite pipe rapid expanding and paste mould, owing to having many steam vents in constraint mould, gas in constraint mould can be made to discharge fast when pad pasting, ensure the subsides mould that metal composite pipe is good, and its expansion-molded speed is exceedingly fast, metal composite pipe is shaped under high strain rate, and the yield strength of its material significantly improves, show according to known research, its energy absorbing efficiency when being subject to axial and radial conquassation significantly improves.
(9) in expansion process, because Constrained mould is to the effect of contraction of metal composite tube swelling, the degrees of expansion of metal composite pipe and the diameter after expanding can be controlled, and also can play corresponding control to the minimizing of walled thickness in expansion process, reduce the impact of the energy-absorbing effect brought due to lower thickness.
(10) when carrying out axial compression, plastic deformation occurs, owing to there being the existence of crest and trough, trough produces depression, can bring out progressive folding, folding mode when precisely can control metal composite pipe conquassation with this.Known research shows that folding region is more, and energy-absorbing effect is better, and the energy-absorbing effect of bellows is better than non-bellows.When axis and radial compression, it is compared with non-expanded tubular, and the yield strength of material increases, and under identical compression travel, its energy-absorbing effect significantly improves.
Accompanying drawing explanation
Figure 1 shows that the front inner and outer tubes profile of composite bimetal pipe expansion;
Figure 2 shows that the electromagnetism expansion-molded schematic diagram of expandable die with two grooves;
Figure 3 shows that mould upper mounted plate top view and front view;
Figure 4 shows that mould bottom plate top view and front view;
Figure 5 shows that mould briquetting top view and front view;
Figure 6 shows that mould T-shaped platform top view and front view;
Figure 7 shows that mould constraint mould schematic diagram;
Figure 8 shows that the Double-metal combined corrugated pipe with two crests after expansion;
Figure 9 shows that the schematic diagram of expandable die with three grooves;
Figure 10 shows that the Double-metal combined corrugated pipe with three crests after expansion.
Wherein: 1-rectifier, 2-resistance, 3-switch, 4-capacitor, 5-step-up transformer, 6-upper mounted plate, 7-set bolt, 8-briquetting, 9-mould bases, 10-metal composite pipe, 10-1 outer tube, pipe in 10-2,11-retrains mould, 12-coil, 13-bottom plate, 14-T shape platform, 15-trapezoidal hole, 16-steam vent, 17-holddown groove, 18-wire guide.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is further described and is described.Obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to invention protection domain.
As shown in Figure 1, the composite bimetal pipe provided in the embodiment of the present invention.The material of its outer tube is high-strength steel, and its length is 150mm, and external diameter is 50mm, and thickness is 1mm.Inner tube material is aluminium alloy, and length is 150mm, and external diameter is 47.5mm, and its thickness is 1mm.
As shown in Figure 2, the compound bellows building mortion of electro-magnetic forming used in the embodiment of the present invention, it is made up of rectifier 1, resistance 2, switch 3, capacitor 4, step-up transformer 5, upper mounted plate 6, set bolt 7, briquetting 8, mould bases 9, metal composite pipe 10, constraint mould 11, coil 12, bottom plate 13, T-shaped platform 14, trapezoidal hole 15, steam vent 16, holddown groove 17, wire guide 18 etc.
Concrete, as shown in Figure 2, industrial voltage 380V is elevated to more than 2000V by transformer 5, and voltage commutation after rising is DC voltage by rectifier 1, and in the effect charge circuit of resistance 2, electric current reduces, and DC voltage charges to capacitor 4, completes live part.When switch 3 closed moment, capacitor 4 pairs of coils 12 discharge, and complete discharge portion.
Concrete, as shown in Figure 3, upper mounted plate 6 has a holddown groove 17, its shape is concave-convex, for connecting mould bases 9, and is fixed mould bases 9, a wire guide 16 is had in the middle of upper mounted plate 6, for drawing the electric wire of coil 12, and there are equally distributed four through holes at flange periphery place, for the connection of set bolt 7.
As shown in Figure 4, also there are equally distributed four through holes in bottom plate 13 edge, for the connection of bolt 7.
As shown in Figure 5, there is the wire guide 16 with upper mounted plate 6 same diameter at briquetting 8 center, for importing and the derivation of coil wire.
As shown in Figure 2 and Figure 7, constraint mould 11 in the present invention's expanding die used, the constraint membrane module of metal composite pipe is that semicircular constraint mould 11 is put together by cross section, vertical axis direction, and there are in the Baltimore groove of each constraint mould 11 equally distributed 3 steam vents 16, can in time the gas between constraint mould 11 and metal composite pipe 10 be discharged when expanding paste mould for metal composite pipe 10.The external diameter of briquetting 8 is consistent with the interior circular diameter of upper mounted plate 6, and bottom corresponding T-shaped platform 14, external diameter is consistent with circular diameter in bottom plate 13.Coil 12 adopts 5mm × 7mm rectangle red copper wire to carry out spiral winding, adopts insulating tape to isolate, fill epoxy resin and coagulating agent outside copper cash between copper cash, and ratio is 1:2 mixing, solidifies rear outer rim turnery processing to the size needed.
Concrete, as shown in Figure 2, upper mounted plate 6 is connected with the concavo-convex combination of mould bases 9 by holddown groove 17 with bottom plate 13, mould bases 9 is carried out to the constraint on above-below direction, and mould bases 9 is fixed.The inner circle of upper mounted plate 6 put into by briquetting 8, metal composite pipe 10 is placed on T-shaped platform 14, and be in the inner circle of bottom plate 6,13, pipe fitting 10 is subject to the constraint of briquetting 8 and T-shaped platform, can not move, coil 12 is enclosed within T-shaped platform 14, by exerting pressure of briquetting 8, can ensure the axiality of coil 12 and metal composite pipe 10.Metal composite pipe 10 is in constraint mould 11, and when expanding, constraint mould 11 carries out radial constraint to it.Mould bases 9 is clamped constraint mould 11 and is fixed it.Four set bolts 7 insert from the trapezoidal hole of four bottom bottom plate 13 15, pass from upper mounted plate 6 flange periphery four through holes.To tightening of set bolt 7, make upper mounted plate 6 push down briquetting 8 and mould bases 9 downwards, briquetting 8 pairs of metal composite pipes 10 and coil 12 are exerted pressure, and prevent metal composite pipe 10 and coil about 12, move left and right, and metal composite pipe 10 and coil 12 are tightly fixed.The head of set bolt 7 is in trapezoidal hole 15, does not expose outside bottom plate 13, and whole shaping dies can be made so steadily to place.
When adopting above-mentioned mould to expand to metal composite pipe, its process comprises the following steps:
Step 1, the interior pipe 10-2 choosing metal composite bellows to be processed and outer tube 10-1, in general, pipe 10-2 chooses the light metal material of good conductivity quality, and as aluminium alloy, outer tube 10-1 chooses high tensile steel tube.
Step 2, the outer tube 10-1 chosen is enclosed within interior pipe 10-2, forms bimetal pipe.
Step 3, the metal composite pipe chosen is put into shaping dies, as shown in Figure 2, according to the correct installation mold of annexation of each several part in above-mentioned mould.
Step 4, boosted by step-up transformer 5 to alternating voltage, different according to the requirement of the shape to corrugated tube, the metal material of metal composite pipe is different, and thickness is different, and step-up transformer 5 is also different, and the voltage after boosting is also corresponding different.
Step 5, after boosting transformation, electric current, by after rectifier 1, becomes direct current, and in the effect charge circuit of resistance 2, electric current reduces, and DC voltage charges to capacitor 4, completes live part.
Step 6, closed circuit switch 3, make electric capacity 4 discharge.Due to curent change violent in induction coil 12, produce induced field, and induced field is to metal composite pipe 10 generation effect, makes to produce induced-current in metal composite pipe 10.
Induced-current in step 7, metal composite pipe 10 produces secondary induction magnetic field, and secondary induction magnetic field and the induced field that coil 12 produces because direction is identical, produce magnetic field pressure at metal composite inside pipe wall place.
The inwall of step 8, coil 12 place metal composite pipe is subject to magnetic field pressure and radial plastic expansion occurs; Due to good than outer tube 10-1 of interior pipe 10-2 electric conductivity, large than outer tube 10-1 of its electromagnetic force be subject to, speed of expansion is also faster, when expanding by the driving of interior pipe 10-2, outer tube 10-1 is expanded with interior pipe 10-2.
When the interior pipe 10-2 of step 9, metal composite pipe 10 drives outer tube 10-1 to expand together, under the effect of constraint mould 11, produce crest and trough, become compound bellows;
After step 10, expansion process terminate, unclamp set bolt 7, from mould, take out the Double-metal combined corrugated pipe after being shaped.
In the mould provided in the present embodiment, metal composite pipe is placed in different constraint moulds, and after overexpansion, its shape also can be different accordingly.As shown in Fig. 7-10, the groove retraining mould 11 in expanding die has multiple, the crest of the multiple projection of appearance that metal composite pipe is corresponding upon inflation, thus, can control the size of crest, height and quantity accurately by shaping dies provided by the present invention.
Utilize electro-magnetic forming principle, use shaping dies provided by the invention, through the metal composite bellows that bulging obtains, can not rotate between interior pipe and outer tube, can not move axially, compound bellows is expansion-molded under high strain-rate, its yield strength improves greatly, energy is absorbed effective when being subject to axial and radial conquassation, compared with non-bellows, can bring out progressive folding during the axial conquassation of the metal composite bellows based on electromagnetic forming technique, improve its energy absorbing efficiency, the energy absorbing efficiency based on the metal composite bellows of electromagnetic forming technique significantly improves.
The outer tube of Double-metal combined corrugated pipe is high-strength steel, interior pipe is aluminium-alloy pipe, after electromagnetism expands, compared with single aluminium alloy bellows, its yield strength is larger, energy-absorbing effect is better, compared with single high tensile steel tube, its weight is lighter, when carrying out electromagnetism and being expansion-molded, drive outer tube by interior pipe, be more easily shaped.
Above embodiment is a part of the present invention, and the dilation dimension of metal composite bellows has close relationship with constraint mould.The size of metal composite pipe is different, material is different, wall thickness is different, then the required condition that expands is also different.A kind of compound bellows forming technique based on electro-magnetic forming principle provided by the present invention, it is a kind of new metal composite bellows forming and machining method, a kind of new metal composite bellows shaping dies is provided, based on the compound bellows that this processing method obtains, its compression folding mode can accurately control, yield strength and energy absorbing efficiency significantly improve, higher than single aluminium-alloy pipe intensity.Compared with single steel pipe, quality is lighter, and in electro-magnetic forming, plasticity is better.
Claims (4)
1. the compound bellows building mortion of an electro-magnetic forming, it is characterized in that: comprise rectifier (1), resistance (2), switch (3), capacitor (4), step-up transformer (5), upper mounted plate (6), set bolt (7), briquetting (8), mould bases (9), constraint mould (11), coil (12), bottom plate (13), T-shaped platform (14), trapezoidal hole (15), steam vent (16), holddown groove (17), wire guide (18), wherein:
Upper mounted plate (6) arranges holddown groove (17), for connecting mould bases (9), and mould bases (9) is fixed, in the middle of upper mounted plate (6), a wire guide (18) is set, for drawing the electric wire of coil, and there are equally distributed four through holes at flange periphery place, for the connection of set bolt;
Uniform four through holes of bottom plate (13) edge, being connected and fixed for bolt;
Briquetting (8) center arranges the wire guide (18) with upper mounted plate (6) same diameter, for importing and the derivation of coil wire;
The constraint membrane module of metal composite pipe is that semicircular constraint mould (11) is put together by cross section, vertical axis direction, and have equally distributed three steam vents (16) in the Baltimore groove of each constraint mould (11); Constraint mould (11) can arrange some arc grooves;
The inner circle of upper mounted plate (6) put into by briquetting (8), metal composite pipe (10) is placed on T-shaped platform (14), and be in the inner circle of upper mounted plate (6) and bottom plate (13), metal composite pipe (10) is subject to the constraint of briquetting (8) and T-shaped platform (14), can not move, coil is enclosed within T-shaped platform (14), metal composite pipe (10) is in constraint mould, and when expanding, constraint mould carries out radial constraint to it; Mould bases (9) is clamped constraint mould (11) and is fixed it; Four set bolts insert from the trapezoidal hole of four bottom bottom plate, pass from upper mounted plate (6) flange periphery four through holes and fix, make upper mounted plate (6) push down briquetting (8) and mould bases (9) downwards, briquetting (8) is exerted pressure to metal composite pipe (10) and coil (12);
Rectifier (1) will voltage commutation be DC voltage after step-up transformer (5) raises, and after resistance, DC voltage charges to capacitor, and when switch closed moment, couple capacitors coil discharges.
2. the compound bellows building mortion of electro-magnetic forming according to claim 1, is characterized in that: when pasting mould for metal composite pipe (10) expansion, and the gas between constraint mould and pipe fitting can be discharged by steam vent in time.
3. the compound bellows building mortion of electro-magnetic forming according to claim 1, it is characterized in that: the external diameter of briquetting (8) is consistent with the interior circular diameter of upper mounted plate (6), corresponding T-shaped platform (14) bottom external diameter is consistent with circular diameter in bottom plate.
4. the compound bellows building mortion of electro-magnetic forming according to claim 1, it is characterized in that: coil adopts 5mm × 7mm rectangle red copper wire to carry out spiral winding, insulating tape is adopted to isolate between copper cash, copper cash outer application epoxy resin and coagulating agent, ratio is 1:2 mixing, solidifies rear outer rim turnery processing to the size needed.
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| DE102004001142A1 (en) * | 2004-01-07 | 2005-08-04 | Gkn Driveline International Gmbh | Corrugated tube shaping method for forming intermediate shaft for motor vehicle, involves applying magnet impulse shaping process to longitudinal section over mandrel for narrowing tube relative to tube outer diameter |
| CN102744310A (en) * | 2012-07-11 | 2012-10-24 | 哈尔滨工业大学 | Magnetic pulse forming device and method of bimetal composite pipe |
| CN102806262A (en) * | 2012-08-06 | 2012-12-05 | 哈尔滨工业大学 | Device and method for axial loading to assist bulging of magnetic pulse pipe |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0824969A (en) * | 1994-07-07 | 1996-01-30 | Japan Steel Works Ltd:The | Electromagnetic forming device for tube expansion and manufacture of tube-like formed product |
-
2014
- 2014-04-01 CN CN201410128175.0A patent/CN103894472B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3279228A (en) * | 1964-03-11 | 1966-10-18 | Gen Dynamics Corp | Forming device and method |
| GB2086284A (en) * | 1980-11-04 | 1982-05-12 | Seti Expl Tech Irrigation | Deforming the ends of tubes electromagnetically |
| US6484384B1 (en) * | 1998-12-31 | 2002-11-26 | Spicer Driveshaft, Inc. | Method of manufacturing an axially collapsible driveshaft assembly |
| DE102004001142A1 (en) * | 2004-01-07 | 2005-08-04 | Gkn Driveline International Gmbh | Corrugated tube shaping method for forming intermediate shaft for motor vehicle, involves applying magnet impulse shaping process to longitudinal section over mandrel for narrowing tube relative to tube outer diameter |
| CN102744310A (en) * | 2012-07-11 | 2012-10-24 | 哈尔滨工业大学 | Magnetic pulse forming device and method of bimetal composite pipe |
| CN102806262A (en) * | 2012-08-06 | 2012-12-05 | 哈尔滨工业大学 | Device and method for axial loading to assist bulging of magnetic pulse pipe |
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| CN103894472A (en) | 2014-07-02 |
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