CN106903212A - A kind of double-layer composite pipe and preparation method thereof - Google Patents
A kind of double-layer composite pipe and preparation method thereof Download PDFInfo
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- CN106903212A CN106903212A CN201710154181.7A CN201710154181A CN106903212A CN 106903212 A CN106903212 A CN 106903212A CN 201710154181 A CN201710154181 A CN 201710154181A CN 106903212 A CN106903212 A CN 106903212A
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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
- B21D31/00—Other methods for working sheet metal, metal tubes, metal profiles
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Abstract
The present invention provides a kind of double-layer composite pipe and its manufacturing process, and for solving in the prior art because the magnification of bimetal pipe is different, processing technology is complicated, cannot form the problem of complex structure component.The present invention provides a kind of manufacturing process of double-layer composite pipe, comprises the following steps：Assembling, hollow aluminum-alloy tubes are arranged inside hollow carbon steel pipe base, form two-layer compound pipe；Shaping, the two-layer compound pipe is placed in extruding space, and described extruding space can match with the two-layer compound pipe, and with forming the die cavity of target shape；The filled media particle in the hollow aluminum-alloy tubes of the two-layer compound pipe；Pressure is applied to the media particle from the axial direction at the two-layer compound pipe two ends；The two-layer compound pipe deforms upon the die cavity described in filling, forms double-layer composite pipe.Double-layer composite pipe preparation of the invention is simple, performance is good, can be used to make the pipe fitting of labyrinth.
Description
Technical field
The present invention relates to pipe fitting processing technique field, in particular it relates to a kind of double-layer composite pipe and preparation method thereof.
Background technology
Pipeline is widely used in aviation boat as the fluid delivery system of the media such as common gas, liquid, powder
My god, communications and transportation, automobile, gas, feedwater and the every field such as heating system and metallurgy, oil, chemical industry, electric power.With
The raising continued to develop with living standards of the people of national economy, industrial construction and dwelling construction expand day by day, to conveying
The performance requirement of pipeline is also being improved constantly, and on the basis of rigidity is ensured, also to there is good decay resistance and resistance to height
Warm nature can be waited.
Composite bimetal pipe is made up of two kinds of different metal pipe materials, between inside and outside two kinds of tubing by various modifications and
Interconnection technique is formed and combined closely, and when being acted on by external force, inside and outside tubing deforms simultaneously and interface does not separate.Composite bimetal pipe
General design principles are the design stresses that base material meets parts, and inner tube meets the performance requirement such as corrosion-resistant or wear-resistant.With list
One metal tube is compared, and composite bimetal pipe combines physics, chemistry and the mechanical characteristic of component metals material, can make full use of outer
The characteristic of pipe and inner tube, not only with required high intensity, but also with the performance such as excellent anticorrosion, wear-resistant, and
And rare and precious metal use has been saved, reduce production cost.Therefore, composite bimetal pipe can be widely used in stone
The conveying in the fields such as oil, chemical industry, nuclear industry, medical treatment, food, building, fire-fighting pipe, heat exchanger pipe and apparatus pipe etc..
Inner tube mainly realizes anti-corrosion function in composite bimetal pipe, and outer tube improves rigidity and intensity, is closed compared to simple aluminium
Golden tubing members cost reduction, stiffness and strength are improved；Antiseptic property is improved compared to simple steel pipe, specific stiffness is improved and realized light
Quantify.
If inner tube selection high-strength aluminum alloy extruding tubing, high strength alumin ium alloy extruding tubing forming property is poor, 5 are, 6 are
No more than 10%, what is had is even below 5% to the aluminum alloy extruded tube elongation percentage maximum for being with 7, even if using annealing or admittedly
Molten its elongation percentage for the treatment of improves general also no more than 20%.Therefore, forming tubular product complicated shape pipe is extruded using high strength alumin ium alloy
Shape component is almost irrealizable.Meanwhile, high strength alumin ium alloy tubular element typically has the use feature of anti-corrosion or loss of weight, also
There is high requirement to intensity, rigidity, case hardness and the mechanical performance such as antifatigue.
Existing bimetal pipe processing uses hydraulic buckling method, and end sealing is typically using machinery in hydraulic bulging process
Sealing is compressed, i.e. the two ends of bimetal pipe are compacted deformation and realize sealing, and such sealing means make ectonexine metal pipe billet
In bulging, the material at two ends can not flow the effect to form feed supplement to shaped region, therefore, using this kind of mode hydroforming
Pipe fitting forming area it is thinning serious, or even produce rupture.
Therefore, in the urgent need to a kind of manufacture craft processing double-layer metal tube, advantage, the simplification of inner and outer tubes are made full use of
Processing technology.
The content of the invention
The used technical scheme that solves the above problems is a kind of double-layer composite pipe and preparation method thereof.
The manufacturing process of a kind of double-layer composite pipe that the present invention is provided, it is characterised in that comprise the following steps：
Assembling：Hollow aluminum-alloy tubes are arranged inside hollow carbon steel pipe base, two-layer compound pipe is formed；
Shaping：The two-layer compound pipe is placed in extruding space, described extruding space can be with the two-layer compound
Pipe matches, and with forming the die cavity of target shape；
The filled media particle in the hollow aluminum-alloy tubes of the two-layer compound pipe；
Pressure is applied to the media particle from the axial direction at the two-layer compound pipe two ends；
The two-layer compound pipe deforms upon the die cavity described in filling, forms double-layer composite pipe.
Preferably, described hollow carbon steel pipe base is obtained by coiling welded.
Preferably, described die cavity is bulge loop, tetrahedron or hexahedron.
Preferably, the material of described hollow carbon steel pipe base is selected from Q235 or 304 stainless steel plates.
Preferably, the material of described hollow aluminum-alloy tubes is selected from AA6061 or AA5052.
Preferably, described extruding space is made up of the closing space that pipe fitting mold and medium pressure head are surrounded；
Wherein, pipe fitting mold at least two, and be driven by drive mechanism and perform relative motion；
The medium pressure head includes the first pressure head and the second pressure head, for applying pressure to the media particle.
Preferably, the step of being heat-treated to the hollow aluminium-alloy pipe was also included before installation step；
Described heat treatment method includes：Annealing or solution treatment.
Preferably, the step of after forming step also including carrying out Ageing Treatment to the double-layer composite pipe.
The present invention also aims to provide a kind of double-layer composite pipe, the double-layer composite pipe is multiple using above-mentioned bilayer
Close the manufacturing process preparation of pipe.
The present invention has following advantages：
1) be due to 5,6 be with 7 be (so-called 5 are, 6 are, 7 be refer to after aluminum alloy extruded tube label AA respectively with
5th, 6,7 beginning) etc. high-strength aluminum alloy material extensibility it is poor, particularly extrude tubing；Welding performance is also poor simultaneously, it is difficult to
The coiling welded pipe of sheet material is prepared, these are all that limitation high strength alumin ium alloy tubing is difficult to the wide variety of main cause in actual production.
If its overcoating thin-walled carbon is in control into composite pipe blank, internal pressure and carbon steel pipe of the liner high strength alumin ium alloy pipe in media particle
Under the double action of outer cladding, its forming property can be effectively improved.The mechanism that forming property is improved is, thick big to pressure
Width is improved and causes that forming limit is improved；Simultaneously strengthen two pipes between rubbing action so that suppress liner pipe deformation it is thinning, this
Different from the stress-strain state of general bulging deformation process.
(2) two-layer compound pipe prepare it is simple.Internal lining pipe can select extruding high strength alumin ium alloy tubing, hollow carbon steel pipe base
It is welded according to extruding tube outer diameter and is obtained.Because media particle bulging process will to the circularity and dimensional tolerance of two-layer compound pipe
Ask relatively low, particularly low to liner and the requirement of hollow carbon steel pipe base fit dimension, this causes that the pipe of the technique is prepared very just
It is prompt and cheap；
(3) typically there is high strength alumin ium alloy tubular element anti-corrosion, loss of weight and energy-absorbing etc. to apply feature, at the same to intensity, just
Degree, case hardness and the mechanical performance such as antifatigue have high requirement, according to hollow carbon steel pipe base and liner high strength alumin ium alloy
Extruded tube is combined, and can greatly adapt to use demand by adjusting the material and thickness of bimetallic material, real
Existing optimal material use efficiency, can further expand the application field of tubular element.
(4) the type composite pipe is prepared using media particle bulging process, forming technology will to mould and loading equipemtn
Ask relatively low, processing step can be realized on universal press, without increasing external device (ED), technique realizes simplicity, more without increasing
Investment.
Brief description of the drawings
Fig. 1 is double-layer composite pipe assembly flow charts in embodiments of the invention 1.
Fig. 2 is the die sinking sectional view of double-layer composite pipe shaping dies in embodiments of the invention 1.
Fig. 3 is the matched moulds sectional view of double-layer composite pipe shaping dies in embodiments of the invention 1.
Fig. 4 is the extrusion molding sectional view of double-layer composite pipe shaping dies in embodiments of the invention 1.
Fig. 5 is the double-layer composite pipe photo of preparation in embodiments of the invention 2.
Fig. 6 is the double-layer composite pipe photo of preparation in embodiments of the invention 3.
Reference：1. hollow carbon steel pipe base；2. hollow aluminum-alloy tubes；3. two-layer compound pipe；4. weld bond；5. medium
Particle；6. medium pressure head；61. first pressure heads；62. second pressure heads；7. pipe fitting mold；71. first pipe fitting molds；72. second pipes
Part mould；8. mould bases；9. die cylinder；10. space is extruded；11. guide rods；12. leader nuts；13. die cavities；14. two-layer compounds
Pipe.
Specific embodiment
To make those skilled in the art more fully understand technical scheme, below in conjunction with the accompanying drawings and specific embodiment party
Formula is described in further detail to the present invention.
Embodiment 1
As Figure 1-4, the present embodiment provides a kind of manufacturing process of double-layer composite pipe, comprises the following steps：
Assembling：Hollow aluminum-alloy tubes 2 are arranged inside hollow carbon steel pipe base 1, two-layer compound pipe 3 is formed；
Specifically, as shown in figure 1, the weld bond 4 of hollow carbon steel pipe base 1 needs cleaning to tie, internal diameter is according to hollow aluminium alloy
The external diameter basic size of pipe 2 coordinates B11 grades of design using standard shaft gap, and using same accuracy grade control welding hollow carbon
The cylindricity of steel pipe base 1.Then, the hollow carbon steel pipe base 1 and hollow aluminum-alloy tubes 2 of two unlike materials are assembled,
Obtain two-layer compound pipe 3.
Preferably, described hollow carbon steel pipe base 1 is obtained by coiling welded.
Shaping：The two-layer compound pipe 3 is placed in extruding space 10, described extruding space 10 can be with the bilayer
Composite pipe blank 3 matches, and with forming the die cavity 13 of target shape；
The filled media particle 5 in the hollow aluminum-alloy tubes 2 of the two-layer compound pipe 3；
Pressure is applied to the media particle 5 from the axial direction at the two ends of two-layer compound pipe 3；
The two-layer compound pipe 3 deforms upon the die cavity 13 described in filling, forms double-layer composite pipe 14.
Specifically, as shown in Fig. 2 die device is in opening, medium pressure head 6 includes the first pressure head 61 and the second pressure
First 62, wherein, upper limit position is on the first pressure head 61, second medium pressure head 62 is in lower position, by hydraulic test
Direct drive；
Pipe fitting mold 7 includes the first pipe fitting mold 71 and the second pipe fitting mold 72, in die opening state, respectively by both sides
Die cylinder 9 directly drive, and slide-and-guide is realized on guide rod 11, guide rod 11 is fixed on mould by leader nut 12
On frame 8.Above-mentioned first medium pressure head 61, second medium pressure head 62, the first pipe fitting mold 71 and the second pipe fitting mold 72 are being opened
Mould state can guarantee that two-layer compound pipe 3 smoothly loads.
As shown in figure 3, loading two-layer compound pipe 3, second medium pressure head 62, the first pipe fitting mold 71, the second pipe fitting mould
Tool 72 moves to die-closed position respectively, after being then charged into media particle 5；First medium pressure head 61 also moves into die-closed position.
Above-mentioned first medium pressure head 61, second medium pressure head 62, the first pipe fitting mold 71 and the second pipe fitting mold 72 exist
Extruding space 10 is formed after matched moulds, described extruding space 10 can be engaged with two-layer compound pipe 3, and with formation
The die cavity 13 of target shape.
Described die cavity 13 is bulge loop, tetrahedron or hexahedron.It is understood that the shape of die cavity 13 can be according to tool
Body needs to design.
As shown in figure 4, the first pipe fitting mold 71 and the second pipe fitting mold 72 respectively die cylinder 90 pressure keep under
Ensure matched moulds state, now first medium pressure head 61, second medium pressure head 62 are loaded under the driving of hydraulic test simultaneously,
Media particle 5 forces two-layer compound pipe 3 to deform patch mould after carrying, obtain double-layer composite pipe 14.First medium pressure head after shaping
61st, second medium pressure head 62 is moved to initial position first, and then the first pipe fitting mold 71 and the second pipe fitting mold 72 are moved to
Initial position, takes out double-layer composite pipe 14, completes forming process.
Cladding pressure effect when the above method utilizes hollow carbon steel pipe base with hollow aluminum-alloy tubes Coupling Deformation, and
Effect is frictionally held between two pipes, the forming property of aluminium alloy pipe is greatly improved, conventional method can be shaped and obtained
Less than complicated tubular element.
Also, by adjusting the material and thickness of hollow carbon steel pipe base and hollow aluminum-alloy tubes, give full play to aluminium alloy
The advantage that specific strength is high, corrosion resistance is strong, performance steel hardness is high, the advantage that intensity is high, welding performance is excellent, is adapted to not
With the rigidity and intensity requirement of use condition, the light-weighted target of component can be realized.
Simultaneously as the welding performance of hollow aluminum-alloy tubes is poor, extruding tubing is can select；And the welding performance of steel plate
Preferably, hollow carbon steel pipe base can be welded according to aluminium alloy extruded pipe outside dimension, hollow carbon steel pipe base and hollow aluminium alloy
Pipe certainly exists certain gap between two pipes in assembling, but causes two pipes by media particle hydroforming
Coupled in common deforms and is brought into close contact, it is ensured that the globality of composite pipe.
Media particle bulging process compares other internal high pressure forming techniques, and composite pipe blank two ends need not compress sealing and carry out shape
Two-layer compound pipe two ends can be free shrink into bulging inner high voltage, therefore media particle Bulging Process, and this is to improve
Shape the key point of pipe fitting evenness of wall thickness.Simultaneously as two kinds of difference in material properties of material of two-layer compound pipe, into
The amount of contraction of inside and outside pipe certainly exists difference in shape, and free pipe end boundary condition is advantageously in the shaping of composite pipe.
Media particle hydroforming is carried out using two-layer compound pipe, with following advantages：
1. in media particle internal pressure Bulging Process, media particle is coated on hollow aluminum-alloy tubes inner surface all the time, compels
Deform inside and outside bimetallic pipe billet coupled in common, hollow carbon steel pipe base deformation reacts on the surface normal of hollow aluminum-alloy tubes
Pressure can significantly improve the forming property of the hollow aluminum-alloy tubes of internal layer；Meanwhile, the raising of tube wall normal pressure enhances two pipes
Rubbing action between wall contact, the friction can suppress thinning, i.e., the so-called friction guarantor in hollow aluminum-alloy tubes shaping
Fruit strengthens holding effect, is also one of key factor of raising forming limit；
2. according to the material of metal inside and outside product demand selection, can more design the thickness ratio of ectonexine metal to adjust product
The rigidity and strength demand of product, realize optimal material use efficiency.Because media particle bulging process is passed using solid particle
Pressure, the pipe high internal pressure environment of formation process demand is wanted without special sealing device to pipe fitting circularity, dimensional tolerance etc.
Ask very low, this process advantage causes prepared by two-layer compound pipe can be carried out using hollow carbon steel pipe base with hollow aluminum-alloy tubes
Wide arc gap is assembled, and the condition of double-layer composite pipe preparation is reduced, so as to reduce manufacturing cost.
Two pipe stressing conditions in specific forming process are analyzed below：
Assuming that：The hollow inside and outside radius of aluminum-alloy tubes is respectively a and b；The inside and outside radius of outer tube is respectively c and d；Thickness of pipe wall
It is t to spend.C before compound>, i.e., there is gap between hollow aluminum-alloy tubes and hollow carbon steel pipe base in b.Managed according to plastoelasticity
By in bulging recombination process, hollow aluminum-alloy tubes gradually expand, and are gradually combined with hollow carbon steel pipe base.Should in plane
Under the conditions of power, with ideal elastic-plastic as material model, hollow aluminum-alloy tubes occur plastic deformation and with hollow carbon steel pipe base
When just contacting, but not yet producing contact, the internal pressure that hollow aluminum-alloy tubes are subject to, hollow aluminum-alloy tubes are further swollen
After swollen, contact will be produced between hollow carbon steel pipe base.When contact reaches a certain limiting value, hollow carbon steel pipe
Base surface is just surrendered, while the internal pressure that hollow aluminum-alloy tubes are subject to also reaches its limiting value.In loading procedure, hollow aluminum
After alloy pipe stock is in contact with hollow carbon steel pipe base and produces contact, hollow carbon steel pipe base is only by uniform internal pressure (contact pressure
Power) effect, thus can calculate the force-bearing situation of any position and radial displacement and hollow carbon steel pipe base inwall in outlet pipe
Displacement.In unloading phase, hollow aluminum-alloy tubes are no longer influenced by the effect of pressure, plasticity unloading can naturally occur and receive
Contracting, i.e., the outer marginal circumference of hollow aluminum-alloy tubes can produce radial displacement.Displacement at hollow carbon steel pipe base inwall with it is hollow
The difference of natural shrinking amount when aluminum-alloy tubes are unloaded is exactly hollow aluminum-alloy tubes and hollow carbon steel pipe base in " common " unloading
During the magnitude of interference, when displacement at outer tube wall is not less than hollow aluminum-alloy tubes natural shrinking amount, connect during unloading
There is residual pressure at contacting surface.
Embodiment 2
The present embodiment uses Q235 sheet material welded still pipes using method as described in example 1 above, hollow carbon steel pipe base 1,
Hollow aluminum-alloy tubes 2 extrude tubing using AA5052, by above-mentioned step, shape bulge loop pipe fitting, are specifically shown in Fig. 5.
In addition, before AA5052 tubing is formed, the heat treatment that can also be carried out to it specifically makes annealing treatment, mesh
Be improve elongation percentage, the reinforcing of AA5052 can be bigger by strain hardening, that is, the degree of bulging, reinforcing effect can be more
It is good.The Main Function of AA5052 is anti-corrosion, energy-absorbing and loss of weight in the present embodiment, and the rigidity of component and intensity mainly pass through Q235
Sheet material welded still pipe is realized.
Embodiment 3
The present embodiment is managed using method as described in example 1 above, hollow carbon steel pipe base 1 using 304 stainless steel plates are coiling welded,
Hollow aluminum-alloy tubes 2 extrude tubing using AA6061, by above-mentioned step, shape hexahedron pipe fitting, are specifically shown in Fig. 6.
In addition, before AA6061 tubing is formed, heat treatment reinforcement material can be carried out, it should be appreciated that for
It is for 6, the heat treatment of 7 line aluminium alloys extruding tubing selects solution treatment.
Horse back is assembled with the coiling welded pipe of 304 stainless steel plates and bulging is into target shape after solution treatment, is then carried out artificial
Timeliness recovers aluminium alloy pipe intensity.The artificial aging condition of AA6061 pipe fittings will not be brought to the material property of 304 stainless steels
Influence, this is also the major reason of their energy compound uses, because inevitable after shaping enter artificial aging link jointly.So manage
The rigidity and intensity of material component are acted on just by the two shared, while liner aluminum alloy materials still have anticorrosive, suction
Can be with the important function of loss of weight.
It is understood that the embodiment of above principle being intended to be merely illustrative of the present and the exemplary implementation for using
Mode, but the invention is not limited in this.For those skilled in the art, essence of the invention is not being departed from
In the case of god and essence, various changes and modifications can be made therein, and these variations and modifications are also considered as protection scope of the present invention.
Claims (9)
1. a kind of manufacturing process of double-layer composite pipe, it is characterised in that comprise the following steps：
Assembling：Hollow aluminum-alloy tubes are arranged inside hollow carbon steel pipe base, two-layer compound pipe is formed；
Shaping：The two-layer compound pipe is placed in extruding space, described extruding space can be with the two-layer compound pipe
Match, and with forming the die cavity of target shape；
The filled media particle in the hollow aluminum-alloy tubes of the two-layer compound pipe；
Pressure is applied to the media particle from the axial direction at the two-layer compound pipe two ends；
The two-layer compound pipe deforms upon the die cavity described in filling, forms double-layer composite pipe.
2. the manufacturing process of double-layer composite pipe as claimed in claim 1, it is characterised in that described hollow carbon steel pipe base is logical
Cross and be welded what is obtained.
3. the manufacturing process of double-layer composite pipe as claimed in claim 1, it is characterised in that described die cavity is bulge loop, four sides
Body or hexahedron.
4. the manufacturing process of double-layer composite pipe as claimed in claim 1, it is characterised in that the material of described hollow carbon steel pipe base
Material is selected from Q235 or 304 stainless steel plates.
5. the manufacturing process of double-layer composite pipe as claimed in claim 1, it is characterised in that described hollow aluminum-alloy tubes
Material is selected from AA6061 or AA5052.
6. the manufacturing process of double-layer composite pipe as claimed in claim 1, it is characterised in that described extruding space is by pipe fitting
The closing space composition that mould and medium pressure head are surrounded；
Wherein, pipe fitting mold at least two, and be driven by drive mechanism and perform relative motion；
The medium pressure head includes the first pressure head and the second pressure head, for applying pressure to the media particle.
7. the manufacturing process of double-layer composite pipe as claimed in claim 1, it is characterised in that it is right also to include before installation step
The step of hollow aluminium-alloy pipe is heat-treated；
Described heat treatment method includes：Annealing or solution treatment.
8. the manufacturing process of double-layer composite pipe as claimed in claim 1, it is characterised in that it is right also to include after forming step
The step of double-layer composite pipe carries out Ageing Treatment.
9. a kind of double-layer composite pipe, it is characterised in that the double-layer composite pipe be using as described in claim 1-8 is any pair
Prepared by the manufacturing process of layer multiple tube.
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| CN201710154181.7A CN106903212B (en) | 2017-03-15 | 2017-03-15 | A kind of double-layer composite pipe and preparation method thereof |
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| CN201710154181.7A CN106903212B (en) | 2017-03-15 | 2017-03-15 | A kind of double-layer composite pipe and preparation method thereof |
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| CN110001077A (en) * | 2019-04-28 | 2019-07-12 | 燕山大学 | A kind of carbon fibre pipe fitting preparation facilities and method |
| CN110001079A (en) * | 2019-04-28 | 2019-07-12 | 燕山大学 | A kind of carbon fibre pipe fitting preparation facilities and method |
| CN110479823A (en) * | 2019-08-09 | 2019-11-22 | 武汉源锦建材科技有限公司 | A kind of reinforcing bar connection shears the molding machine and forming method of slot with grout sleeve |
| CN110814123A (en) * | 2019-11-14 | 2020-02-21 | 哈尔滨工业大学 | Rapid thermal forming device and method for flexible medium auxiliary corrugated pipe axially loaded/subjected to friction material supplementing |
| CN114700388A (en) * | 2022-04-28 | 2022-07-05 | 太原理工大学 | Forming method for thin-wall multi-way composite pipe fitting |
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| CN110976671A (en) * | 2019-12-12 | 2020-04-10 | 太原理工大学 | Solid particle medium forming method and device for aluminum-clad magnesium composite pipe fitting |
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| CN114700388B (en) * | 2022-04-28 | 2023-09-08 | 太原理工大学 | Forming method for thin-wall multi-way composite pipe fitting |
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| CN106903212B (en) | 2019-06-25 |
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