CN107878564A - A kind of tubing and its manufacture method - Google Patents
A kind of tubing and its manufacture method Download PDFInfo
- Publication number
- CN107878564A CN107878564A CN201610874492.6A CN201610874492A CN107878564A CN 107878564 A CN107878564 A CN 107878564A CN 201610874492 A CN201610874492 A CN 201610874492A CN 107878564 A CN107878564 A CN 107878564A
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- Prior art keywords
- pipe fitting
- pipe
- tubing
- reinforcement
- built
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
- B62D21/02—Understructures, i.e. chassis frame on which a vehicle body may be mounted comprising longitudinally or transversely arranged frame members
-
- 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
- B21D53/00—Making other particular articles
- B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The present invention relates to tubing field, discloses a kind of tubing and its manufacture method.The tubing includes pipe fitting and at least one built-in reinforcement, and the pipe fitting is monoblock type tubular structure, and the built-in reinforcement is reinforcement structure that is being arranged on the inside pipe fitting and being contacted with the inner surface of pipe fitting.Tubing provided by the invention can greatly improve the mechanical property of product in the case where not increasing peripheral volume, be that surface effect is intact, integration product of excellent in mechanical performance.
Description
Technical field
The present invention relates to tubing field, in particular it relates to a kind of tubing, a kind of manufacture method of tubing and by this method
Manufacture obtained tubing.
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 die forming part, thus obtain zero of required geometry
Part, wherein, the shape of gained molded parts can be controlled by controlling the interior shape of mould.With traditional punching press
The hollow unit manufacturing process of additional welding is compared, and internal high pressure forming technique has obvious advantage.Hydroforming technology
Production efficiency is high, and process is few, and the strong rigidity of made parts is high, therefore is widely used in automobile, Aeronautics and Astronautics field,
The today especially grown to even greater heights in automotive light weight technology cry, higher demand is proposed to the technology.However, internal high pressure forming master
If carrying out variable cross-section shaping processing based on hollow tube, vacancy is furnished with multiple in cross section for no image of Buddha industry or architectural shape
The architectural features such as muscle, beam are supportted, intensity, insufficient rigidity defect be present at the extra high position of some performance requirements.
Therefore, researchers have also made corresponding improvement to the pipe girder construction obtained by internal high pressure forming, with enhancing
Its rigidity and intensity.For example, CN102267490A discloses a kind of automobile longitudinal girder and its manufacture method based on internal high pressure forming.
This is made up of based on the automobile longitudinal girder of internal high pressure forming pipe fitting A1 and reinforcer A2, and the pipe fitting A1 is monoblock type tubular structure,
For ensureing the requirement of automobile longitudinal girder each several part fit dimension, the section of the reinforcer A2 is in groove-like or rectangle, is fixed
On pipe fitting A1 center outer surface, for strengthening pipe fitting A1 rigidity and intensity.The automobile longitudinal girder based on internal high pressure forming
Manufacture method include the following steps for carrying out in order：(1) using tubing as blank using press-bending or numerical-controlled bending technique system
Into pipe fitting A1 preform；(2) pipe fitting A1 is made using inside high-pressure forming method in above-mentioned pipe fitting A1 preform；(3)
Section is made using Sheet Metal Forming Technology using sheet material as blank and is in the reinforcer A2 of groove-like, or interior height is used using tubing as blank
The reinforcer A2 that section is rectangle is made in pressing formation method；(4) reinforcer A2 is placed on pipe fitting A1 center outer surface,
If reinforcer A2 section is in groove-like, the opening on its side is set to be fitted on pipe fitting A1, if reinforcer A2 section
It is rectangle, the side where making one long side is fitted on pipe fitting A1, then using overlap joint, docking, splicing or joggle method
Both are connected.Pipe fitting made of the patent application by the use of internal high pressure forming as longeron main element, while in main part
The outside of part is arranged to add to the reinforcer of pipe fitting rigidity and intensity, meets the premise of requirement keeping longeron rigidity and intensity
Under use relatively thin wall thickness as far as possible.However, this product has the following disadvantages：Be present a large amount of soldereds in product peripheral, influence
It is attractive in appearance；Reinforcer is placed on outside internal high pressure forming Guan Liang, is connected by welding manner, and volume is big, for the production of space limitation
Product application is limited.
The content of the invention
The invention aims to provide a kind of new tubing, a kind of manufacture method of tubing and manufactured by this method
Obtained tubing.
Specifically, the invention provides a kind of tubing, wherein, the tubing includes pipe fitting and at least one built-in enhancing
Part, the pipe fitting are monoblock type tubular structure, the built-in reinforcement be arranged on the inside pipe fitting and with the pipe fitting
The reinforcement structure of inner surface contact.
Present invention also offers a kind of manufacture method of tubing, this method includes pipe obtaining pipe using internal high pressure forming
Part, at least one built-in reinforcement is placed within the pipe fitting afterwards, and by way of in outer surface of pipe fittings welding
The built-in reinforcement is fixed on the inner surface of the pipe fitting.
In addition, present invention also offers the tubing for manufacturing to obtain by the above method.
The manufacture method of tubing provided by the invention is needing to strengthen fixed increase in position on the basis of internal high pressure forming
Reinforcement built in buttress brace etc., then the built-in reinforcement is set to be with pipe fitting soldering by the method for welding in outside of the pipe fitting at this
One complete single piece, the tubing so enabled to can also greatly improve mechanics on the premise of peripheral volume is not increased
Performance and surface effect is intact.
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 concrete structure schematic diagram of pipe；
Fig. 2 be it is preforming after pipe a kind of concrete structure schematic diagram；
Fig. 3 is a kind of concrete structure schematic diagram of tubing, wherein, reinforcement is built in the pipe fitting that internal high pressure forming obtains
At cross section, A-A；
Fig. 4 is the sectional view at tubing A-A places, the Irregular parts in oval pipe fitting be built in reinforcement.
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.
Tubing provided by the invention includes pipe fitting and at least one built-in reinforcement, and the pipe fitting is monoblock type tubulose knot
Structure, the built-in reinforcement is reinforcement structure that is being arranged on the inside pipe fitting and being contacted with the inner surface of pipe fitting.
The pipe fitting can be hollow uniform tube part, or hollow variable cross-section pipe fitting, can also be part hollow
The composite pipe of uniform tube part and part hollow variable cross-section pipe fitting.When hollow variable cross-section part in pipe fitting be present, pipe fitting is cut
The change in face can be designed according to actual needs, and can be carried out during pipe fitting forming by the shape of mould
Control.In addition, the cross section of the pipe fitting can be it is existing variously-shaped, for example, can be circular, square, triangle with
And other irregular shapes.This those skilled in the art can be known, therefore not to repeat here.
The built-in reinforcement can be one, or it is multiple, and the pipe fitting can be arranged on need to increase
On the inner surface of strong position.The built-in reinforcement can be arranged on table in the part of pipe fitting along the length direction of the pipe fitting
Face, the whole inner surface of pipe fitting can also be arranged on along the length direction of the pipe fitting, specifically also should optionally strengthen position
The length put and determine, this those skilled in the art can be known, therefore not to repeat here.
The built-in reinforcement can be buttress brace.The same cross-section of the pipe fitting can only set a reinforcement
Beam, a plurality of buttress brace can also be set.When the same cross-section of the pipe fitting is provided with a plurality of buttress brace, every buttress brace
At least part position contacted with the inner surface of pipe fitting, and different buttress braces can be staggered, and specific setting form does not have
Especially limit.
The present invention is not particularly limited to the material of the pipe fitting and built-in reinforcement, and both can also may be used with identical
With difference, and existing various steel and/or alloy in lightweight can be each independently.As well known to the skilled person,
Term " steel " refers to that hardness is high, resistance to elevated temperatures is good, processing characteristics is good, heavy material.Term " alloy in lightweight " refers to
Hardness is low, in light weight (density is less than 5.0g/cm3) alloy material.Category belonging to both is that those skilled in the art know
Know.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
At least one of alloy, aluminium alloy and titanium alloy.
The present invention is not particularly limited to the wall thickness of the pipe fitting, can generally be selected according to actual needs
Select, for example, the wall thickness of the pipe fitting can be 1-20mm, preferably 1-10mm.
The manufacture method of tubing provided by the invention includes pipe obtaining pipe fitting using internal high pressure forming, afterwards will at least
One built-in reinforcement is placed within the pipe fitting, and by the built-in enhancing by way of in outer surface of pipe fittings welding
Part is fixed on the inner surface of the pipe fitting.
As described above, the built-in reinforcement can be one, or it is multiple, and can be by way of welding
It is arranged on the inner surface for needing enhancing position of the pipe fitting.The built-in reinforcement can be along the length side of the pipe fitting
To the local inner surface for being arranged on pipe fitting, the whole inner surface of pipe fitting can also be arranged on along the length direction of the pipe fitting,
Specifically it also should optionally strengthen the length of position and determine.In addition, the built-in reinforcement can be buttress brace.Now, institute
A buttress brace can only be set by welding manner by stating the same cross-section of pipe fitting, can also be set by welding manner more
Bar buttress brace.When the same cross-section of the pipe fitting is provided with a plurality of buttress brace, at least part position of every buttress brace
Contacted with the inner surface of pipe fitting, and different buttress braces can be staggered, specific setting form is not particularly limited.
When built-in reinforcement is fixed using welding manner, the respective surfaces of the pipe fitting and built-in reinforcement
Solder joint be melted in welding process, after treating that temperature declines, the pipe fitting and built-in reinforcement then form an entirety.
The present invention is not particularly limited to the material of the pipe and built-in reinforcement, and both can also may be used with identical
With difference, and existing various steel and/or alloy in lightweight can be each independently.As described above, term " steel " refers 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, weight is (close
Degree is less than 5.0g/cm3) alloy material.Category belonging to both is that those skilled in the art know.From widespread popularity
Angle considers that the steel are preferably stainless steel and/or carbon steel, alloy in lightweight preferred magnesium alloy, aluminium alloy and the titanium alloy
At least one of.
The present invention is not particularly limited to the wall thickness of the pipe, can generally be selected according to actual needs
Select, for example, the wall thickness of the pipe can be 1-20mm, preferably 1-10mm.In addition, the cross section of the pipe can be existing
What is had is variously-shaped, for example, can be circular, square, triangle and other irregular shapes.
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.For example, the method for the internal high pressure forming includes the pipe being put into mould, mould is closed, then
The both ends of the pipe punch. contact and are sealed with sliding, afterwards toward liquid medium is injected in the pipe, pass through control
The axial load for sliding drift and the pressure of the liquid medium deform upon the pipe.The pipe is by sliding
Deformed under both ends axial load and the collective effect of high-pressure liquid medium that dynamic drift provides and be finally bonded mould, by
This 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 the pipe to exist
Deformed upon under the collective effect of the liquid medium and the both ends axial load provided by slip drift and be finally bonded mould i.e.
Can.For example, the liquid medium can be at least one of water under high pressure, hydraulic oil, emulsion etc., from raw material it is ready availability and
From the point of view of environmental protection, preferably water under high pressure.The pressure of the liquid medium can be 0-500MPa, 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.When the Internal High Pressure Forming process at high temperature, it is possible to increase
The forming property of the pipe, so as to obtain complicated large deformation tubing.In addition, the high temperature can be provided by mould, can also
There is provided, can also be provided jointly by both of the above by liquid medium.A preferred embodiment of the invention, the liquid
The temperature of 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.
Furthermore, it is necessary to the tubing prepared can be straight tube, can also bend pipe.When tubing prepared by needs is bend pipe, institute
Stating the manufacture method of tubing can be additionally included in using before internal high pressure forming, will first use press-bending or numerical-controlled bending technique to manage
Base bend preforming, and preforming pipe is carried out into internal high pressure forming again afterwards.
A preferred embodiment of the invention, the manufacture method of the tubing are also included the built-in reinforcement
After being fixed on the inner surface of the pipe fitting, the outer surface of the pipe fitting is polished polishing, so enabled to
The smooth outer surface of tubing, good appearance.
According to a kind of embodiment of the present invention, as Figure 1-Figure 4, the manufacture method of the tubing includes：Will
Pipe shown in Fig. 1 obtains the preforming pipe shown in Fig. 2, connect using bending or numerical-controlled bending technique bend preforming
And pipe fitting is obtained using internal high pressure forming, then the built-in reinforcement formed by buttress brace is placed within the pipe fitting, and passes through
These built-in reinforcements are fixed on the inner surface of the pipe fitting in the mode of outer surface of pipe fittings welding, then by pipe fitting
Outer surface is polished polishing, and obtained tubing is as shown in figure 3, wherein, buttress brace is located at the cross section, A-A of pipe fitting, specifically
Structure is as shown in Figure 4.
In addition, present invention also offers the tubing 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 tubing provided by the invention and its manufacture method.
It regard gapless stainless steel tube (cross section is circular, external diameter 103mm, wall thickness 2mm) as pipe.Using press-bending work
Skill is preforming, obtains preforming pipe.Then the preforming pipe is put into mould (temperature is 120 DEG C), mould is closed,
The both ends of preforming pipe and it is connected with the slip drift of pipeline and uses high pressure sealing, then by pipeline to preforming pipe
Middle injection pressure is 50MPa, the water under high pressure that temperature is 80 DEG C.The axial load that drift is slided by controlling is 50MPa and height
The pressure for pressing water is 50MPa, preforming pipe is produced deformation, obtains pipe fitting.Then (it is in well by four buttress braces by reinforcement
Font sets to obtain, and girth (i.e. pipe fitting is setting the interior girth at reinforcement, similarly hereinafter) is about 280mm, length 180cm, material
Matter is carbon steel, and the width of every buttress brace is 2mm) it is built at the cross section, A-A of pipe fitting, carried out in the outer surface of the pipe fitting
Welding, then by the outer surface polishing grinding of pipe fitting, obtains table so that four buttress braces are both secured on the inner surface of the pipe fitting
The intact integrated tubing G1 of face effect, its wall thickness are 1.95mm.Determined through GB/T244-1997 metal tubes bend test method,
Counter-bending power of the tubing G1 at cross section, A-A is 60KN.
Embodiment 2
The embodiment is used to illustrate tubing provided by the invention and its manufacture method.
It regard seamless magnesium-alloy tube (cross section is circular, external diameter 128mm, wall thickness 4mm) as pipe.Using press-bending work
Skill is preforming, obtains preforming pipe.Then the preforming pipe is put into mould (temperature is 400 DEG C), mould is closed,
The both ends of preforming pipe and it is connected with the slip drift of pipeline and uses high pressure sealing, then by pipeline to preforming pipe
Middle injection pressure is 130MPa, the water under high pressure that temperature is 150 DEG C.Slided by controlling the axial load of drift for 30MPa and
The pressure of water under high pressure is 130MPa, preforming pipe is produced deformation, obtains pipe fitting.Then by reinforcement (by four buttress braces
Set to obtain in groined type, girth is about 330mm, and length 200cm, material is magnesium alloy, and the width of every buttress brace is
2mm) it is built at the cross section, A-A of pipe fitting, is welded in the outer surface of the pipe fitting so that four buttress braces are both secured into this
On the inner surface of pipe fitting, then by the outer surface polishing grinding of pipe fitting, the intact integrated tubing G2 of surface effect, its wall are obtained
Thickness is 1.95mm.Determined through GB/T244-1997 metal tubes bend test method, tubing G2 is counter-bending at cross section, A-A
Power is 46KN.
Embodiment 3
The embodiment is used to illustrate tubing provided by the invention and its manufacture method.
It regard seamless Al-alloy pipe (cross section is circular, external diameter 94mm, wall thickness 2mm) as pipe.Using press-bending work
Skill is preforming, obtains preforming pipe.Then the preforming pipe is put into mould (temperature is 250 DEG C), mould is closed,
The both ends of preforming pipe and it is connected with the slip drift of pipeline and uses high pressure sealing, then by pipeline to preforming pipe
Middle injection pressure is 80MPa, the water under high pressure that temperature is 50 DEG C.The axial load that drift is slided by controlling is 20MPa and height
The pressure for pressing water is 80MPa, preforming pipe is produced deformation, obtains pipe fitting.Then (it is in water by four buttress braces by reinforcement
Equality spacing be arranged in parallel to obtain, and girth is about 250mm, length 150mm, and material is aluminium alloy, the width of every buttress brace
It is 2mm) it is built at the cross section, A-A of pipe fitting, welded in the outer surface of the pipe fitting so that four buttress braces are fixed
In on the inner surface of the pipe fitting, then by the outer surface polishing grinding of pipe fitting, the intact integrated tubing G3 of surface effect is obtained,
Its wall thickness is 1.95mm.Determined through GB/T244-1997 metal tubes bend test method, tubing G3 is anti-at cross section, A-A
Bending force is 50KN.
Comparative example 1
The comparative example is used for the tubing and its manufacture method for illustrating reference.
Tubing is manufactured according to the method for embodiment 1, unlike, including the step of reinforcement, obtaining pipe built in setting
Material DG1.Determined through GB/T244-1997 metal tubes bend test method, counter-bending power of the tubing DG1 at cross section, A-A is
39KN。
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, any group can also be carried out between a variety of embodiments of the present invention
Close, as long as it without prejudice to the thought of the present invention, it should equally be considered as content disclosed in this invention.
Claims (12)
1. a kind of tubing, it is characterised in that it is whole that the tubing, which includes pipe fitting and at least one built-in reinforcement, the pipe fitting,
Body formula tubular structure, the built-in reinforcement is reinforcement that is being arranged on the inside pipe fitting and being contacted with the inner surface of pipe fitting
Structure.
2. tubing according to claim 1, wherein, the material of the pipe fitting and built-in reinforcement is each independently selected from not
Become rusty at least one of steel, carbon steel, magnesium alloy, aluminium alloy and titanium alloy.
3. tubing according to claim 1 or 2, wherein, the wall thickness of the pipe fitting is 1-20mm.
4. tubing according to claim 1 or 2, wherein, the built-in reinforcement is buttress brace.
5. a kind of manufacture method of tubing, this method includes pipe obtaining pipe fitting using internal high pressure forming, afterwards will at least one
Individual built-in reinforcement is placed within the pipe fitting, and by the built-in reinforcement by way of in outer surface of pipe fittings welding
It is fixed on the inner surface of the pipe fitting.
6. manufacture method according to claim 5, wherein, the material of the pipe and built-in reinforcement is selected independently of one another
From at least one of stainless steel, carbon steel, magnesium alloy, aluminium alloy and titanium alloy.
7. manufacture method according to claim 5, wherein, the built-in reinforcement is buttress brace.
8. according to the manufacture method described in any one in claim 5-7, wherein, the method for the internal high pressure forming includes will
The pipe is put into mould, and mould is closed, then by the both ends of the pipe with sliding punch. contact and sealing, afterwards
Liquid medium is injected into the pipe, by controlling the axial load of the slip drift and the pressure of the liquid medium
Deform upon the pipe.
9. manufacture method according to claim 8, wherein, the pressure of the liquid medium is 0-500MPa；The liquid
The temperature of medium and mould is each independently 20-500 DEG C.
10. according to the manufacture method described in any one in claim 5-7, wherein, when the thickness of the pipe is 1-20mm.
11. according to the manufacture method described in any one in claim 5-7, wherein, this method is also included the built-in increasing
After strong part is fixed on the inner surface of the pipe fitting, the outer surface of the pipe fitting is polished polishing.
12. obtained tubing is manufactured as the method described in any one in claim 5-11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610874492.6A CN107878564A (en) | 2016-09-30 | 2016-09-30 | A kind of tubing and its manufacture method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610874492.6A CN107878564A (en) | 2016-09-30 | 2016-09-30 | A kind of tubing and its manufacture method |
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| CN107878564A true CN107878564A (en) | 2018-04-06 |
Family
ID=61770058
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| CN201610874492.6A Pending CN107878564A (en) | 2016-09-30 | 2016-09-30 | A kind of tubing and its manufacture method |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10175028A (en) * | 1996-12-18 | 1998-06-30 | Nippon Steel Corp | Highly accurate forming method of metallic tube by hydro-forming method |
| CN1418136A (en) * | 2000-02-18 | 2003-05-14 | 科西马国际公司 | Tubular assembly having hydroformed interconnecting member and method for making same |
| CN1754632A (en) * | 2004-09-29 | 2006-04-05 | 日产自动车株式会社 | Preform, hydroforming method and Hydroformed part |
| CN1765534A (en) * | 2004-10-29 | 2006-05-03 | 日产自动车株式会社 | The preform, hydroforming method and the Hydroformed part that are used for hydroforming |
| US7614271B2 (en) * | 2004-09-29 | 2009-11-10 | Nissan Motor Co., Ltd. | Preform, hydroforming method, and hydroformed product |
| CN102267490A (en) * | 2011-05-04 | 2011-12-07 | 北京航空航天大学 | Internal-high-pressure-forming-based automobile longitudinal beam and manufacturing method thereof |
| CN103551444A (en) * | 2013-11-14 | 2014-02-05 | 深圳智慧能源技术有限公司 | Method for manufacturing hollow structure |
-
2016
- 2016-09-30 CN CN201610874492.6A patent/CN107878564A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10175028A (en) * | 1996-12-18 | 1998-06-30 | Nippon Steel Corp | Highly accurate forming method of metallic tube by hydro-forming method |
| CN1418136A (en) * | 2000-02-18 | 2003-05-14 | 科西马国际公司 | Tubular assembly having hydroformed interconnecting member and method for making same |
| CN1754632A (en) * | 2004-09-29 | 2006-04-05 | 日产自动车株式会社 | Preform, hydroforming method and Hydroformed part |
| US7614271B2 (en) * | 2004-09-29 | 2009-11-10 | Nissan Motor Co., Ltd. | Preform, hydroforming method, and hydroformed product |
| CN1765534A (en) * | 2004-10-29 | 2006-05-03 | 日产自动车株式会社 | The preform, hydroforming method and the Hydroformed part that are used for hydroforming |
| CN102267490A (en) * | 2011-05-04 | 2011-12-07 | 北京航空航天大学 | Internal-high-pressure-forming-based automobile longitudinal beam and manufacturing method thereof |
| CN103551444A (en) * | 2013-11-14 | 2014-02-05 | 深圳智慧能源技术有限公司 | Method for manufacturing hollow structure |
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