CN107876617A - A kind of composite pipe and its manufacture method - Google Patents
A kind of composite pipe and its manufacture method Download PDFInfo
- Publication number
- CN107876617A CN107876617A CN201610874494.5A CN201610874494A CN107876617A CN 107876617 A CN107876617 A CN 107876617A CN 201610874494 A CN201610874494 A CN 201610874494A CN 107876617 A CN107876617 A CN 107876617A
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- Prior art keywords
- pipe
- composite pipe
- alloy
- steel
- inner tube
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
- B21D26/051—Deforming double-walled bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
- B21D26/041—Means for controlling fluid parameters, e.g. pressure or temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16S—CONSTRUCTIONAL ELEMENTS IN GENERAL; STRUCTURES BUILT-UP FROM SUCH ELEMENTS, IN GENERAL
- F16S3/00—Elongated members, e.g. profiled members; Assemblies thereof; Gratings or grilles
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The present invention relates to tubing field, discloses a kind of composite pipe and its manufacture method.The manufacture method of the composite pipe includes interior pipe being placed within outer pipe, carries out internal high pressure forming afterwards；The outer pipe is made up of steel, and said inner tube base is made up of alloy in lightweight.The compound tubing structure that is obtained using method provided by the invention is complete, density is relatively low and intensity is higher, great prospects for commercial application.
Description
Technical field
The present invention relates to tubing field, in particular it relates to the manufacture method of a kind of composite pipe, a kind of composite pipe and
The composite pipe for manufacturing to obtain by this method.
Background technology
The deadweight for mitigating automobile, aircraft is to reduce one of energy consumption and the major measure of disposal of pollutants.Light-weighted main way
Footpath is to use light material and light body structure.Light material includes aluminium alloy, magnesium alloy and composite etc., the master of light body structure
Form is wanted to include overall structure, shell and hollow variable cross-section.For hollow variable cross-section parts, traditional manufacturing process is generally
First stamping two half, then weld integral, the technique not only complex procedures, and quality is difficult to ensure that again.It is and interior
High-pressure forming is particularly suitable for formed hollow variable cross-section parts.In internal high pressure forming, pipe internally highly pressurised liquid and both ends
Deformed upon under the collective effect of axial load and be finally bonded mould, thus obtain the parts of required geometry, wherein,
The shape of gained molded parts can be controlled by controlling the interior shape of mould.However, existing light-alloy pipe
Material insufficient formability at normal temperatures, it is difficult to which light-alloy tubing is obtained using high-pressure molding.
In order to solve the problem, CN1751819A discloses a kind of use and lightweight pipe is heated in high-pressure forming
To improve the method for its forming property manufacture alloy in lightweight tubing.Specifically, CN1751819A discloses a kind of light-alloy tubing
Warm hydroforming method, this method comprise the following steps：(1) mould is heated to 150-500 DEG C；(2) pipe is put into
In mould through step (1) heating, mould is closed；(3) drift is contacted and sealed with the both ends of pipe, then pass through pipe
The hot liquid medium of 150-500 DEG C of injection in road direction pipe；(4) when the temperature of mould, pipe and hot liquid medium reaches
During to 150-500 DEG C, by controlling the axial load of drift and the pressure of hot liquid medium, pipe is set to deform, i.e.,
Produce the light-alloy tubing parts of design.However, this method although solve existing light-alloy tubing at normal temperatures into
The problem of shape is poor, processing difficulties, but this method needs mould being heated to higher temperature, while be situated between using hot liquid
Matter, high energy consumption, molding condition are harsh.
The content of the invention
During the invention aims to overcome using existing method manufacture lightweight tubing, high energy consumption and shaping bar be present
The defects of part harshness, and provide a kind of new composite pipe, a kind of composite pipe manufacture method and by this method manufacture
Composite pipe.
Specifically, the invention provides a kind of composite pipe, wherein, the composite pipe include close-fitting inner tube and
Outer tube, the outer tube are made up of steel, and said inner tube is made up of alloy in lightweight, and do not include bonding between the outer tube and inner tube
Agent.
Present invention also offers a kind of manufacture method of composite pipe, wherein, this method includes interior pipe being placed in outer tube
Within base, internal high pressure forming is carried out afterwards；The outer pipe is made up of steel, and said inner tube base is made up of alloy in lightweight.
In addition, present invention also offers the composite pipe for manufacturing to obtain by the above method.
The present inventor has found after further investigation, and the intensity of pipe is higher made of steel and easy-formation,
It is not easily broken under larger deformation quantity, but quality is generally heavier；Quality of tube blank steel is lighter made of alloy in lightweight, but by force
Relatively low and not easy-formation is spent, is easily broken under larger deformation quantity；And using steel pipe as outer pipe and by alloy in lightweight
Pipe can not only utilize the good plastic deformation ability of steel pipe to on-deformable as interior pipe in forming process
Alloy in lightweight pipe enters row constraint, not cracky, and alloy in lightweight pipe is in this specific stress coated by steel pipe
Deformability under state can significantly improve, while the effect of frictional force can effectively reduce alloy in lightweight pipe between two kinds of pipes
Inhomogeneities is thinned in base thickness, and the density of obtained composite pipe is small, and between alloy in lightweight and steel, intensity is high, especially
Suitable for the product scope of lightweight high performance requirements.In addition, can be without mould heating and heat using the method for this offer
The use of state liquid medium, energy-conserving and environment-protective, easily implement.To sum up, the knot of the composite pipe obtained using method provided by the invention
Structure is complete, density is relatively low and intensity is higher, great prospects for commercial application.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Brief description of the drawings
Accompanying drawing is for providing a further understanding of the present invention, and a part for constitution instruction, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is a kind of sectional view of the original state of specific manufacture method of the composite pipe of the present invention；
Fig. 2 is a kind of sectional view of the final state of specific manufacture method of the composite pipe of the present invention.
Description of reference numerals
1- slides drift；2- moulds；The outer pipes of 3-；Pipe in 4-；5- pipelines.
Embodiment
The embodiment of the present invention is described in detail below.It is it should be appreciated that described herein specific
Embodiment is merely to illustrate and explain the present invention, and is not intended to limit the invention.
The end points of disclosed scope and any value are not limited to the accurate scope or value herein, these scopes or
Value should be understood to comprising the value close to these scopes or value.For number range, between the endpoint value of each scope, respectively
It can be combined with each other between the endpoint value of individual scope and single point value, and individually between point value and obtain one or more
New number range, these number ranges should be considered as specific open herein.
Composite pipe provided by the invention includes close-fitting inner and outer tubes, and the outer tube is made up of steel, described
Inner tube is made up of alloy in lightweight, and does not include binding agent between the outer tube and inner tube.
In the present invention, do not include binding agent between the outer tube and inner tube namely represent not to adopt between outer tube and inner tube
Bonding connection is carried out with binding agent.
As well known to the skilled person, term " steel " refer to hardness is high, resistance to elevated temperatures is good, processing characteristics is good,
Heavy material.Term " alloy in lightweight " refers to that hardness is low, in light weight (density is less than 5.0g/cm3) alloy material.Both
Affiliated category is that those skilled in the art know.The present invention is not special to the specific species of the steel and alloy in lightweight
Ground limits, and existing various steel may be incorporated for being configured to the outer tube, and existing various alloy in lightweight may be incorporated for
It is configured to said inner tube.From the point of view of widespread popularity, the steel are preferably stainless steel and/or carbon steel, the lightweight
Alloy is preferably at least one of magnesium alloy, aluminium alloy and titanium alloy.
The present invention is not particularly limited to the wall thickness of the outer tube and inner tube, can generally be entered according to actual needs
Row selection, for example, the wall thickness of the outer tube can be 0.5-20mm, preferably 0.5-10mm, more preferably 0.5-5mm；It is described
The wall thickness of inner tube can be 1-20mm, preferably 1-10mm, more preferably 1-5mm.
The composite pipe can be hollow uniform tube material, or hollow variable cross-section tubing, can also be part
The composite pipe of hollow uniform tube material and part hollow variable cross-section tubing.When hollow variable cross-section part in composite pipe being present
When, the change in composite pipe section can be designed according to actual needs, and can be in composite pipe forming process
It is controlled by the interior shape of mould.In addition, the cross section of the composite pipe can be existing variously-shaped, example
Such as, it can be circular, square, triangle and other irregular shapes.This those skilled in the art can be known, herein not
Repeat.
The manufacture method of composite pipe provided by the invention includes interior pipe being placed within outer pipe, high in progress afterwards
Pressing formation；The outer pipe is made up of steel, and said inner tube base is made up of alloy in lightweight.
As described above, term " steel " refers to that hardness is high, resistance to elevated temperatures is good, processing characteristics is good, heavy material.Art
Language " alloy in lightweight " refers to that density is low, in light weight (density is less than 5.0g/cm3) alloy material.Both are at affiliated category
Those skilled in the art know.The present invention is not particularly limited to the specific species of the steel and alloy in lightweight, existing
Various steel may be incorporated for being configured to the outer pipe, and existing various alloy in lightweight may be incorporated for being configured in described
Pipe.From the point of view of widespread popularity, the steel are preferably stainless steel and/or carbon steel, and the alloy in lightweight is preferably
Magnesium alloy and/or aluminium alloy.
According to the manufacture method of tubing provided by the invention, the specific operation process of the internal high pressure forming is this area skill
Known in art personnel.According to a kind of embodiment of the present invention, as depicted in figs. 1 and 2, the method bag of the internal high pressure forming
Include the composite pipe blank after being superimposed said inner tube base 4 and outer pipe 3 to be put into mould 2, mould 2 is closed, then will be described multiple
The both ends for closing pipe contact and sealed with slip drift 1, are situated between afterwards (by pipeline 5) toward injection liquid in said inner tube base 4
Matter, by controlling the axial load of the slip drift 1 and the pressure of the liquid medium to make the composite pipe blank that shape occur
Become.The composite pipe blank issues in the both ends axial load and the collective effect of high-pressure liquid medium provided by slip drift 1
The shape that changes simultaneously finally is bonded mould, thus obtains the parts of required geometry.
The present invention is not particularly limited to the species and pressure of the liquid medium, as long as enabling to interior pipe and outer
Pipe is deformed upon under the collective effect of the liquid medium and the both ends axial load provided by slip drift and finally pasted
Matched moulds has.For example, the liquid medium can be at least one of water under high pressure, hydraulic oil, emulsion etc., it is easy from raw material
From the point of view of property and environmental protection, preferably water under high pressure.The pressure of the liquid medium can be 0-500MPa, be preferably
50-400MPa, most preferably 50-300MPa.In the present invention, the pressure refers both to gauge pressure.
According to the manufacture method of tubing provided by the invention, the Internal High Pressure Forming can be carried out at normal temperatures,
It can at high temperature carry out, preferably carry out at high temperature, because when the Internal High Pressure Forming is carried out at high temperature,
The forming property of the outer pipe and interior pipe can be improved, so as to obtain complicated large deformation composite pipe.In addition, the high temperature
It can be provided, can also be provided by liquid medium by mould, can also provided jointly by both of the above.According to one kind of the present invention
Preferred embodiment, the temperature of the liquid medium is 20-500 DEG C, more preferably 30-400 DEG C, most preferably 40-300 DEG C；
The temperature of the mould is 20-500 DEG C, more preferably 30-400 DEG C, most preferably 40-300 DEG C.
The present invention is not particularly limited to the size of said inner tube base and outer pipe, as long as can be placed in interior pipe outer
Within pipe, said inner tube base and outer pipe can be to be fitted close, i.e. between the two without space, outer pipe it is interior
Portion's size is equal to the outside size of interior pipe；Can also be not close cooperation, i.e. between the two in the presence of a fixed gap, outer pipe
Interior size be more than interior pipe outside size.When said inner tube base and outer pipe is are fitted close, in internal high pressure forming
During, two kinds of pipes deform simultaneously；When said inner tube base and outer pipe are not close cooperation, in Internal High Pressure Forming
In, interior pipe first deforms, and is contacted afterwards with outer pipe, and then both deform simultaneously again.
The present invention is not particularly limited to the wall thickness of the outer pipe and interior pipe, generally can be according to actual use
Need to be selected, for example, the wall thickness of the outer pipe can be 0.5-20mm, preferably 0.5-10mm, more preferably 0.5-
5mm；The wall thickness of said inner tube base can be 1-20mm, preferably 1-10mm, more preferably 1-5mm.
Present invention also offers the composite pipe for manufacturing to obtain by the above method.
The present invention will be described in detail by way of examples below.
Embodiment 1
The embodiment is used to illustrate composite pipe provided by the invention and its manufacture method.
Outer pipe 3, Stainless pipe billet, external diameter 35mm, thickness 1mm, density 7.93g/cm3；
Interior pipe 4, aluminum-alloy tubes, external diameter 32.9mm, thickness 2mm, density 2.90g/cm3。
As shown in figure 1, interior pipe 4 is placed in outer pipe 3, the composite pipe blank after superposition is put into mould (temperature 120
DEG C) in, mould is closed, the both ends of composite pipe blank use high pressure sealing with being connected with the slip drift 1 of pipeline 5, then lead to
Cross pipeline 5 and the water under high pressure that pressure is 50MPa, temperature is 80 DEG C is injected into the interior pipe 4 of composite pipe blank.Punching is slided by controlling
First 1 axial load is 20MPa and the pressure of water under high pressure is 50MPa, composite pipe blank is produced deformation, finally produces structure
Complete aluminium/steel composite tubing G1, density 4.74g/cm3, it includes close-fitting inner and outer tubes, and the wall thickness of outer tube is
0.9mm, the wall thickness of inner tube is 1.8mm.Determined through GB/T244-1997 metal tubes bend test method, the aluminium/steel composite tubing
G1 maximum counter-bending power is 10.8KN.
Embodiment 2
The embodiment is used to illustrate composite pipe provided by the invention and its manufacture method.
Outer pipe 3, Stainless pipe billet, external diameter 35mm, thickness 1mm, density 7.93g/cm3；
Interior pipe 4, magnesium alloy pipe, external diameter 32.9mm, thickness 2mm, density 1.78g/cm3。
As shown in figure 1, interior pipe 4 is placed in outer pipe 3, the composite pipe blank after superposition is put into mould (temperature 120
DEG C) in, mould is closed, the both ends of composite pipe blank use high pressure sealing with being connected with the slip drift 1 of pipeline 5, then lead to
Cross pipeline 5 and the water under high pressure that pressure is 80MPa, temperature is 40 DEG C is injected into the interior pipe 4 of composite pipe blank.Punching is slided by controlling
First 1 axial load is 20MPa and the pressure of water under high pressure is 80MPa, composite pipe blank is produced deformation, finally produces structure
Complete magnesium/steel composite tubing G2, density 3.96g/cm3, it includes close-fitting inner and outer tubes, and the wall thickness of outer tube is
0.9mm, the wall thickness of inner tube is 1.8mm.Determined through GB/T244-1997 metal tubes bend test method, the magnesium/steel composite tubing
G2 maximum counter-bending power is 9.21KN.
Embodiment 3
The embodiment is used to illustrate composite pipe provided by the invention and its manufacture method.
Outer pipe 3, carbon steel pipe, external diameter 35mm, thickness 1mm, density 7.85g/cm3；
Interior pipe 4, titanium alloy pipe, external diameter 32.9mm, thickness 2mm, density 4.51g/cm3。
As shown in figure 1, interior pipe 4 is placed in outer pipe 3, the composite pipe blank after superposition is put into mould (temperature 100
DEG C) in, mould is closed, the both ends of composite pipe blank use high pressure sealing with being connected with the slip drift 1 of pipeline 5, then lead to
Cross pipeline 5 and the water under high pressure that pressure is 150MPa, temperature is 60 DEG C is injected into the interior pipe 4 of composite pipe blank.Slided by controlling
The axial load of drift 1 is 20MPa and the pressure of water under high pressure is 150MPa, composite pipe blank is produced deformation, finally produces
The composite pipe G3 of structural integrity, density 5.69g/cm3, it includes close-fitting inner and outer tubes, and the wall thickness of outer tube is
0.9mm, the wall thickness of inner tube is 1.8mm.Determined through GB/T244-1997 metal tubes bend test method, composite pipe G3 is most
Big counter-bending power is 34.5KN.
Embodiment 4
The embodiment is used to illustrate composite pipe provided by the invention and its manufacture method.
Method according to embodiment 1 prepares composite pipe, unlike, the temperature of mould and high-pressure liquid medium is 20
DEG C, obtain aluminium/steel composite tubing G4 of structural integrity, density 4.74g/cm3, through GB/T244-1997 metal tube bend tests
Method determines, and the aluminium/steel composite tubing G4 maximum counter-bending power is 10.5KN.
Comparative example 1
The comparative example is used for the tubing and its manufacture method for illustrating reference.
Method according to embodiment 1 prepares tubing, unlike, outer pipe is only subjected to internal high pressure forming.Specific steps
It is as follows：
Outer pipe, Stainless pipe billet, external diameter 35mm, thickness 1mm, density 7.93g/cm3。
Outer pipe is put into mould (temperature is 120 DEG C), mould closed, the both ends of outer pipe are with being connected with pipeline
Slip drift use high pressure sealing, then by the outside pipe of pipeline inject pressure be 50MPa, the high pressure that temperature is 80 DEG C
Water.The axial load that drift is slided by controlling is 20MPa and the pressure of water under high pressure is 50MPa, outer pipe is produced deformation,
Obtain reference tubing DG1, its structural integrity, density 7.93g/cm3, thickness 0.9mm.It is curved through GB/T244-1997 metal tubes
Bent test method measure, reference tubing DG1 maximum counter-bending power is 6.55KN.
Comparative example 2
The comparative example is used for the tubing and its manufacture method for illustrating reference.
Method according to embodiment 2 prepares tubing, unlike, interior pipe is only subjected to internal high pressure forming.Specific steps
It is as follows：
Interior pipe, magnesium alloy pipe, external diameter 32.9mm, thickness 2mm, density 1.78g/cm3。
Interior pipe is put into mould (temperature is 120 DEG C), mould closed, the both ends of interior pipe are with being connected with pipeline
Slip drift use high pressure sealing, then by the inside pipe of pipeline inject pressure be 80MPa, the high pressure that temperature is 40 DEG C
Water.The axial load that drift is slided by controlling is 20MPa and the pressure of water under high pressure is 80MPa, interior pipe is produced deformation,
Reference tubing DG2 is obtained, its structure is imperfect, is ruptured in forming process, density 1.78g/cm3。
Comparative example 3
The comparative example is used for the composite pipe and its manufacture method for illustrating reference.
Method according to embodiment 2 prepares composite pipe, unlike, the material of interior pipe and outer pipe is exchanged, obtained
To reference composite pipe blank DG3, its structure is imperfect, is ruptured in forming process, density 5.75g/cm3。
The preferred embodiment of the present invention described in detail above, still, the present invention are not limited in above-mentioned embodiment
Detail, in the range of the technology design of the present invention, a variety of simple variants can be carried out to technical scheme, this
A little simple variants belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance
In the case of shield, it can be combined by any suitable means.In order to avoid unnecessary repetition, the present invention to it is various can
The combination of energy no longer separately illustrates.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should equally be considered as content disclosed in this invention.
Claims (10)
- A kind of 1. composite pipe, it is characterised in that the composite pipe includes close-fitting inner and outer tubes, the outer tube by Steel are made, and said inner tube is made up of alloy in lightweight, and do not include binding agent between the outer tube and inner tube.
- 2. composite pipe according to claim 1, wherein, the steel are stainless steel and/or carbon steel；The alloy in lightweight Selected from least one of magnesium alloy, aluminium alloy and titanium alloy.
- 3. composite pipe according to claim 1 or 2, wherein, the wall thickness of the outer tube is 0.5-20mm, said inner tube Wall thickness is 1-20mm.
- 4. a kind of manufacture method of composite pipe, it is characterised in that this method includes interior pipe being placed within outer pipe, afterwards Carry out internal high pressure forming；The outer pipe is made up of steel, and said inner tube base is made up of alloy in lightweight.
- 5. manufacture method according to claim 4, wherein, the steel are stainless steel and/or carbon steel；The alloy in lightweight Selected from least one of magnesium alloy, aluminium alloy and titanium alloy.
- 6. the manufacture method according to claim 4 or 5, wherein, the method for the internal high pressure forming is included said inner tube Base and outer pipe superposition after composite pipe blank be put into mould, mould is closed, then by the both ends of the composite pipe blank with Slide punch. contact simultaneously to seal, afterwards toward liquid medium is injected in said inner tube base, by the axial direction for controlling the slip drift Load and the pressure of the liquid medium deform upon the composite pipe blank.
- 7. manufacture method according to claim 6, wherein, the pressure of the liquid medium is 0-500MPa, preferably 50- 400MPa, most preferably 50-300MPa.
- 8. manufacture method according to claim 6, wherein, the temperature of the liquid medium and mould is each independently 20-500 DEG C, 30-400 DEG C is preferably each independently, is more preferably each independently 40-300 DEG C.
- 9. the manufacture method according to claim 4 or 5, wherein, the wall thickness of the outer pipe is 0.5-20mm, said inner tube The wall thickness of base is 1-20mm.
- 10. obtained composite pipe is manufactured as the method described in any one in claim 4-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610874494.5A CN107876617A (en) | 2016-09-30 | 2016-09-30 | A kind of composite pipe and its manufacture method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610874494.5A CN107876617A (en) | 2016-09-30 | 2016-09-30 | A kind of composite pipe and its manufacture method |
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| CN107876617A true CN107876617A (en) | 2018-04-06 |
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| CN201610874494.5A Pending CN107876617A (en) | 2016-09-30 | 2016-09-30 | A kind of composite pipe and its manufacture method |
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| WO2020103217A1 (en) * | 2018-11-19 | 2020-05-28 | 大连理工大学 | Aluminum alloy special-shaped pipe ultralow temperature medium pressure forming method |
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| US10960452B2 (en) | 2018-11-19 | 2021-03-30 | Dalian University Of Technology | Method for pressure forming of aluminum alloy special-shaped tubular component by using ultra low temperature medium |
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