CN107597942A - A kind of preparation method and its device of high strength alumin ium alloy tubing members - Google Patents
A kind of preparation method and its device of high strength alumin ium alloy tubing members Download PDFInfo
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- CN107597942A CN107597942A CN201711091592.2A CN201711091592A CN107597942A CN 107597942 A CN107597942 A CN 107597942A CN 201711091592 A CN201711091592 A CN 201711091592A CN 107597942 A CN107597942 A CN 107597942A
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Abstract
The invention discloses a kind of preparation method and its device of high strength alumin ium alloy tubing members, method includes S1：It will be put into after high strength alumin ium alloy tubing prebuckling in lower mould；S2：The granule medium after preheating is loaded into pipe by granule medium to load；S3：After the hull-skin temperature of high strength alumin ium alloy tubing reaches swelling pressure temperature, medium pressure head is pushed, and constant pressure is kept after making high strength alumin ium alloy pipe deformations to pre- bulging shape；S4：Sliding die matched moulds, the high strength alumin ium alloy tubing after pre- bulging is set to be deformed into target shape under sliding die and the collective effect of medium pressure head.Device includes lower mould and upper mould, lower mould is used to place high strength alumin ium alloy tubing, and the both sides of high strength alumin ium alloy tubing are respectively equipped with a sliding die, and upper mould is arranged on the downside of upper bolster, upper bolster is provided with bearing material cylinder, and bearing material cylinder aligns with the medium pressure head being slideably positioned on intermediate slider.The present invention can make high strength alumin ium alloy pipe be easier to paste mold forming, and improve the dimensional accuracy of high strength alumin ium alloy tubing members.
Description
Technical field
The present invention relates to pressure molding technique field, more particularly to a kind of preparation method of high strength alumin ium alloy tubing members
And its device.
Background technology
In fields such as aircraft, spacecraft and automobiles, it is people's length to mitigate weight and save material and operating energy
The target that phase pursues, and one of trend of modern advanced manufacturing technique development.Particularly in the automotive industry, due to fuel and
The cost reason of raw material, the lightweight of vehicle structure is seemed and become more and more important.In addition to using light material, mitigate the another of weight
One main path is exactly that the strong components such as " real with empty generation " and variable cross-section are used in structure.It can both be mitigated using hollow-core construction
Weight savings material, the strength and stiffness of material can be made full use of again.
Aluminum alloy materials have that density is low, specific strength is high, the high-quality characteristic such as heat-resisting, wear-resisting, anti-corrosion, are widely used in navigating
The fields such as empty space flight, auto industry and petrochemical industry.High-strength aluminum alloy material mainly includes 6xxx aluminium alloys and 7xxx aluminium alloys
Material, and both serial aluminium alloys are heat-treatable strengthened aluminum alloy material.But high strength alumin ium alloy pipe fitting deformation at room temperature
Ability is poor, can not shape complicated shape part, significantly limit its application.Meanwhile use conventional rigid Mo Neigao
The high strength alumin ium alloy component of platen press shaping, easily limit by die size influences with aluminum alloy materials resiliences, formation of parts
Dimensional accuracy it is generally relatively low, and part forming limit phase made from tradition once-forming technique (punching press, drawing etc.) processing
To relatively low.Therefore, it is necessary to develop a kind of manufacturing process of the hollow light body component of high-strength aluminum alloy material for being easier to shaping.
The content of the invention
It is above-mentioned to solve it is an object of the invention to provide a kind of preparation method and its device of high strength alumin ium alloy tubing members
The problem of prior art is present, make high strength alumin ium alloy pipe be easier to paste mold forming, and improve the chi of high strength alumin ium alloy tubing members
Very little precision.
To achieve the above object, the invention provides following scheme：
The invention provides a kind of preparation method of high strength alumin ium alloy tubing members, comprise the following steps：
S1：It will be put into after high strength alumin ium alloy tubing prebuckling in lower mould；
S2：Intermediate slider and medium pressure head push, until upper bolster and bearing material cylinder close with the lower mould and the high-strength aluminium
Golden tubing matched moulds, the granule medium after preheating is loaded into pipe by granule medium and loads the high strength alumin ium alloy tubing and described holds
The granule medium of being retracted in barrel, after the completion of filling loads pipe；
S3：The hull-skin temperature of the high strength alumin ium alloy tubing is detected using infrared temperature measurement apparatus, is closed in the high-strength aluminium
After the hull-skin temperature of golden tubing reaches swelling pressure temperature, medium pressure head pushes, and makes the high strength alumin ium alloy pipe deformations to pre-swollen
Constant pressure is kept after shape shape；
S4：Sliding form frame drives sliding die to make pre-swollen to the high strength alumin ium alloy tubing movement after pre- bulging and matched moulds
The high strength alumin ium alloy tubing after shape is deformed into target shape under the sliding die and the collective effect of the medium pressure head,
Medium pressure head is retracted after pressurize certain time, you can high strength alumin ium alloy tubing members are taken out in die sinking.
Preferably, the preheating temperature of the hot granule medium is 400 DEG C~600 DEG C.
Preferably, the swelling pressure temperature is 250 DEG C~400 DEG C.
Preferably, the high strength alumin ium alloy pipe deformations after pre- bulging are to pressurize 1min~2min after target shape.
Preferably, the granule medium is silicon nitride ceramic ball.
Preferably, a diameter of 0.4mm~3.0mm of the silicon nitride ceramic ball, bending strength be 900MPa~
1200MPa, fracture toughness scope are 5MPa~6MPa, and hardness is not less than 1380HV.
Preferably, a diameter of 0.5mm~0.8mm of the silicon nitride ceramic ball.
Preferably, during die sinking, the sliding form frame first drives the sliding die to away from the high strength alumin ium alloy tubing structure
The direction movement of part, then the intermediate slider drive upper bolster and bearing material cylinder are to away from the lower mould and the high strength alumin ium alloy
The direction movement of tubing members.
Present invention also offers a kind of preparation facilities of high strength alumin ium alloy tubing members, including lower mould and upper mould, under described
Mould is arranged on fixed die holder, and the fixed die holder is fixedly arranged on mould bases, and the lower mould is used to place high strength alumin ium alloy tubing, institute
The both sides for stating high strength alumin ium alloy tubing are respectively equipped with a sliding die, and the sliding die can drive relatively described height by sliding form frame
Strength aluminum alloy tubing moves；
The upper mould is arranged on the downside of upper bolster, and the upper bolster is fixedly arranged on intermediate slider, and the upper bolster is provided with
Bearing material cylinder, the bearing material cylinder align with the medium pressure head being slideably positioned on intermediate slider, the intermediate slider and granule medium
Load pipe to be slidably connected, the granule medium loads pipe and can loaded into the bearing material cylinder and the high strength alumin ium alloy tubing
Granule medium；
It is equipped with the fixed die holder, the sliding die and the upper mould for detecting the high strength alumin ium alloy tubing table
The infrared temperature measurement apparatus of face temperature.
Preferably, the sliding form frame is slided by sliding guide and the stuck-module being fixedly arranged on the fixed form and connected
Connect, the lower mould is bolted with the stuck-module；The fixed die holder, the lower mould, the sliding die and described
Cooling line is equipped with inside upper mould.
Preferably, the granule medium is silicon nitride ceramic ball.
Preferably, a diameter of 0.4mm~3.0mm of the silicon nitride ceramic ball, bending strength be 900MPa~
1200MPa, fracture toughness scope are 5MPa~6MPa, and hardness is not less than 1380HV.
Preferably, a diameter of 0.5mm~0.8mm of the silicon nitride ceramic ball.
The present invention achieves following technique effect relative to prior art：
Rise based on high strength alumin ium alloy tubing with forming temperature, the principle that its forming property can significantly improve, the present invention
Provide a kind of preparation method and its device of high strength alumin ium alloy tubing members.The present invention is hot by being passed through to tubing inside
Granule medium, granule medium bulging is carried out to high strength alumin ium alloy tubing when tubing temperature reaches forming temperature, and combine and slide
Mould carries out external load to the preform pipe of the granule medium internal pressure comprising warm, finally gives target pipe fitting finished product.
The solids pressure warm forming of high strength alumin ium alloy tubing is combined by the present invention with sliding die pressure forming, is changed
Enter the simple bulging deformation pattern of existing pipe fitting internal high pressure forming, realize the moulding side of mould active movement patch mould
Method, the patch mould performance of high strength alumin ium alloy pipe fitting forming process can greatly be improved, so as to solve original internal high pressure forming only according to
By super-pressure force pipe bulging not easy sticker mould the problem of, making to utilize the local feature compared with low pressure Accurate Shaping pipe fitting to turn into can
Can, reduce requirement of the production technology to external equipment and sealing system.In addition, stablized under the high temperature conditions using granule medium
Mechanically and chemically performance and the good heat conductivility of high-strength aluminum alloy material, the granule medium after heating is loaded to high-strength
Aluminium alloy pipe, by the heat transfer between granule medium and high strength alumin ium alloy tubing by high strength alumin ium alloy tubing be heated to temperature into
Temperature needed for shape, has saved energy consumption, improves production efficiency.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment
The accompanying drawing needed to use is briefly described, it should be apparent that, drawings in the following description are only some implementations of the present invention
Example, for those of ordinary skill in the art, on the premise of not paying creative work, can also be obtained according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is that the preparation facilities of high strength alumin ium alloy tubing members of the present invention is illustrated in the front view structure of the first working condition
Figure；
Fig. 2 is the cross section structure diagram of A-A in Fig. 1；
Fig. 3 is that the preparation facilities of high strength alumin ium alloy tubing members of the present invention is illustrated in the front view structure of the second working condition
Figure；
Fig. 4 is the cross section structure diagram of A-A in Fig. 3；
Fig. 5 is that the preparation facilities of high strength alumin ium alloy tubing members of the present invention is illustrated in the front view structure of the 3rd working condition
Figure；
Fig. 6 is the cross section structure diagram of A-A in Fig. 5；
Fig. 7 is the cross section structure diagram of B-B in Fig. 5；
Fig. 8 is that the preparation facilities of high strength alumin ium alloy tubing members of the present invention is illustrated in the front view structure of the 4th working condition
Figure；
Fig. 9 is the cross section structure diagram of A-A in Fig. 8；
Figure 10 is the cross section structure diagram of B-B in Fig. 8；
Figure 11 is that the preparation facilities of high strength alumin ium alloy tubing members of the present invention is illustrated in the front view structure of the 5th working condition
Figure；
Figure 12 is the cross section structure diagram of A-A in Figure 11；
Figure 13 is the cross section structure diagram of B-B in Figure 11；
Figure 14 is that the preparation facilities of high strength alumin ium alloy tubing members of the present invention is illustrated in the front view structure of the 6th working condition
Figure；
Figure 15 is the cross section structure diagram of A-A in Figure 14；
Figure 16 is the cross section structure diagram of B-B in Figure 14；
Figure 17 is that the preparation facilities of high strength alumin ium alloy tubing members of the present invention is illustrated in the front view structure of the 7th working condition
Figure；
Figure 18 is the cross section structure diagram of A-A in Figure 17；
Wherein：Mould under 1-, the upper moulds of 2-, 3- fix die holder, 4- mould bases, 5- sliding dies, 6- sliding form frames, 7- upper bolsters, 8-
Intermediate slider, 9- bearing material cylinders, 10- medium pressure heads, 11- granule mediums, which load, manages, 12- infrared temperature measurement apparatus, 13- sliding guides,
14- stuck-modules, 15- cooling lines, 16- granule mediums.
Embodiment
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 carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
It is above-mentioned to solve it is an object of the invention to provide a kind of preparation method and its device of high strength alumin ium alloy tubing members
The problem of prior art is present, make high strength alumin ium alloy pipe be easier to paste mold forming, and improve the chi of high strength alumin ium alloy tubing members
Very little precision.
In order to facilitate the understanding of the purposes, features and advantages of the present invention, it is below in conjunction with the accompanying drawings and specific real
Applying mode, the present invention is further detailed explanation.
As shown in Fig. 1-18：Present embodiments provide a kind of preparation facilities of high strength alumin ium alloy tubing members, including lower mould 1
With upper mould 2, lower mould 1 is connected by bolt with fixed die holder 3 and stuck-module 14, and the fixed die holder 3 is fixedly arranged on mould bases 4,
The lower mould 1 is used to place high strength alumin ium alloy tubing.The both sides of the high strength alumin ium alloy tubing are respectively equipped with a sliding die 5, institute
Stating sliding die 5 can be driven by sliding form frame 6 relative to high strength alumin ium alloy tubing movement, and sliding form frame 6 is by sliding oil cylinder
Cylinder rod drives, and cylinder body and the mould bases 4 of sliding oil cylinder are connected, and the sliding form frame 6 is described solid with being fixedly arranged on by sliding guide 13
Stuck-module 14 on solid plate is slidably connected, and sliding guide 13 can slide in the guide rod hole of stuck-module 14, to ensure
Two sliding dies 5 can accurate matched moulds.
The upper mould 2 is arranged on the downside of upper bolster 7, and the upper bolster 7 is fixedly arranged on intermediate slider 8, on the upper bolster 7
Provided with bearing material cylinder 9, the bearing material cylinder 9 aligns with the medium pressure head 10 being slideably positioned on intermediate slider 8, intermediate slider 8 and Jie
Matter pressure head 10 can be moved up and down by hydraulic press or the driving of other press.The intermediate slider 8 loads pipe 11 with granule medium
It is slidably connected, granule medium loads pipe 11 and is communicated with granule medium accumulating tank, and granule medium accumulating tank has heating and heat preserving function,
Being capable of heated particle medium 16.The granule medium loads pipe 11 can be to the bearing material cylinder 9 and the high strength alumin ium alloy tubing
Middle filling granule medium 16.The granule medium 16 is silicon nitride ceramic ball, and the diameter of the silicon nitride ceramic ball is preferably
0.4mm~3.0mm, more preferably 0.5mm~0.8mm, bending strength are 900MPa~1200MPa, and fracture toughness scope is
5MPa~6MPa, hardness are not less than 1380HV.
It is equipped with the fixed die holder 3, the sliding die 5 and the upper mould 2 for detecting the high strength alumin ium alloy pipe
The infrared temperature measurement apparatus 12 of material surface temperature.Inside the fixed die holder 3, the lower mould 1, the sliding die 5 and the upper mould 2
Cooling line 15 is equipped with, to accelerate the cooling velocity of high strength alumin ium alloy tubing and granule medium 16.
The present embodiment additionally provides a kind of preparation method of high strength alumin ium alloy tubing members, comprises the following steps：
S1：It will be put into after high strength alumin ium alloy tubing prebuckling in lower mould 1, as shown in Figure 1-2；
S2：Intermediate slider 8 and medium pressure head 10 push, until upper bolster 7 and bearing material cylinder 9 and the lower mould 1 and the height
Strength aluminum alloy tubing matched moulds, the granule medium 16 after preheating is loaded into pipe 11 by granule medium and loads the high strength alumin ium alloy pipe
In material and the bearing material cylinder 9, the granule medium of being retracted after the completion of filling loads pipe 11；The preheating of the hot granule medium 16
Temperature is preferably 400 DEG C~600 DEG C, as shown in fig. 3 to 7；
S3：The hull-skin temperature of the high strength alumin ium alloy tubing is detected using infrared temperature measurement apparatus 12, in the high-strength aluminium
After the hull-skin temperature of alloy pipe reaches swelling pressure temperature, medium pressure head 10 pushes, and makes the high strength alumin ium alloy pipe deformations extremely
Constant pressure is kept after pre- bulging shape；The swelling pressure temperature is preferably 250 DEG C~400 DEG C, as seen in figs. 8-10；
S4：Sliding form frame 6 drives sliding die 5 to make pre- to the high strength alumin ium alloy tubing movement after pre- bulging and matched moulds
The high strength alumin ium alloy tubing after bulging is deformed into target under the sliding die 5 and the collective effect of the medium pressure head 10
Shape, medium pressure head 10 is retracted after pressurize certain time, you can high strength alumin ium alloy tubing members are taken out in die sinking, and the dwell time is preferred
For 1min~2min, as figs 11-13.
Wherein, die sinking concretely comprises the following steps：The sliding form frame 6 first drives the sliding die 5 to away from the high-strength aluminium
The direction movement of alloy pipe component, until sliding die 5 resets, as illustrated in figures 14-16, then in the drive of intermediate slider 8
Die holder 7 and bearing material cylinder 9 move to the direction away from the lower mould 1 and the high strength alumin ium alloy tubing members, until upper mould 2 is multiple
Position, as shown in figs. 17-18.
The setting requirements of each parameter are illustrated exemplified by processing wall thickness as 2.0mm high strength alumin ium alloy tubing below.
When high strength alumin ium alloy tubing is 6 line aluminium alloy, such as AA6061, the preheating temperature of granule medium 16 is preferably 500
DEG C~580 DEG C, most preferably 550 DEG C；Swelling pressure temperature is preferably 385 DEG C, and the pressure that medium pressure head 10 pushes is preferably 35MPa,
Dwell time is preferably 1min.
When high strength alumin ium alloy tubing is 7 line aluminium alloy, such as AA7075, the preheating temperature of granule medium 16 is preferably 420
DEG C~490 DEG C, most preferably 430 DEG C.Swelling pressure temperature is preferably 275 DEG C, and the pressure that medium pressure head 10 pushes is preferably 45MPa,
Dwell time is preferably 2min.
It should be noted that：The present embodiment does not have particular/special requirement, main pin to the species of high strength alumin ium alloy tubing and source
To 6 series, 7 serial high strength alumin ium alloy tubing, mainly for thickness in below 3mm tubing, and the present embodiment is in prebuckling
Manufacturing process used does not have particular/special requirement, conventional pressure forming, pressure size preferably 30~50MPa.High-strength aluminium closes
Golden tubing prebuckling is put into shaping dies, and the present embodiment does not have particular/special requirement to pre-bend shape, typically can be according to target zero
Part size shape determines pre-bend shape.The present embodiment does not have particular/special requirement to pre- bulging shape, can be according to target pipe fitting shape
Shape design determines.
The present embodiment obtains following technique effect relative to prior art：
1st, change the simple bulging deformation pattern of existing pipe fitting internal high pressure forming, pass through the bulging of granule medium 16 and pressure
Both forming technologies are combined, and improve the patch mould performance of pipe fitting, and complicated shape abnormity can be shaped under less forming pressure
Section pipe fitting, cheap into production cost, product design is flexible, dimensional accuracy is high.
2nd, using first pre- bulging, external pressure loading and shaping, such a mode can shape pipe fitting office while holding pipe internal pressure afterwards
Portion's section feature is less than the diameter of original pipe, and this causes this technique to can adapt to the tubular element of increasingly complex cross sectional shape.
3rd, silicon nitride ceramic ball density is small, intensity is high, wear-and corrosion-resistant, and at a high temperature of 800 DEG C, intensity, hardness are constant, tool
Have self lubricity, ensure that Forming Workpiece has good surface quality, can recycle, green pollution-free, can with gram
Take fluid, gas medium under the high temperature conditions difficult sealing and loading the problem of.
4th, using the good heat conductivility of high strength alumin ium alloy, the granule medium 16 after preheating is loaded into pipe, passed through
Heat transfer between granule medium 16 and pipe is by heating of pipe blank to warm working temperature, equivalent to by heating of pipe blank process and shaping
A part of merging treatment of process, to save energy consumption, improve production efficiency.
Apply specific case in this specification to be set forth the principle and embodiment of the present invention, above example
Explanation be only intended to help understand the present invention method and its core concept；Meanwhile for those of ordinary skill in the art,
According to the thought of the present invention, in specific embodiments and applications there will be changes.In summary, in this specification
Appearance should not be construed as limiting the invention.
Claims (10)
- A kind of 1. preparation method of high strength alumin ium alloy tubing members, it is characterised in that：Comprise the following steps：S1：It will be put into after high strength alumin ium alloy tubing prebuckling in lower mould；S2：Intermediate slider and medium pressure head push, until upper bolster and bearing material cylinder and the lower mould and the high strength alumin ium alloy pipe Material matched moulds, the granule medium after preheating is loaded into pipe by granule medium and loads the high strength alumin ium alloy tubing and the bearing material cylinder In, the granule medium of being retracted after the completion of filling loads pipe；S3：The hull-skin temperature of the high strength alumin ium alloy tubing is detected using infrared temperature measurement apparatus, in the high strength alumin ium alloy pipe After the hull-skin temperature of material reaches swelling pressure temperature, medium pressure head pushes, and makes the high strength alumin ium alloy pipe deformations to pre- bulging shape Constant pressure is kept after shape；S4：The sliding die that sliding form frame drives is moved to the high strength alumin ium alloy tubing after pre- bulging and matched moulds, after making pre- bulging The high strength alumin ium alloy tubing be deformed into target shape, pressurize under the sliding die and the collective effect of the medium pressure head Medium pressure head is retracted after certain time, you can high strength alumin ium alloy tubing members are taken out in die sinking.
- 2. the preparation method of high strength alumin ium alloy tubing members according to claim 1, it is characterised in that：The hot particle The preheating temperature of medium is 400 DEG C~600 DEG C.
- 3. the preparation method of high strength alumin ium alloy tubing members according to claim 1, it is characterised in that：The swelling pressure temperature For 250 DEG C~400 DEG C.
- 4. the preparation method of high strength alumin ium alloy tubing members according to claim 1, it is characterised in that：Institute after pre- bulging State pressurize 1min~2min after high strength alumin ium alloy pipe deformations to target shape.
- 5. the preparation method of high strength alumin ium alloy tubing members according to claim 1, it is characterised in that：The granule medium For silicon nitride ceramic ball.
- 6. the preparation method of high strength alumin ium alloy tubing members according to claim 5, it is characterised in that：The silicon nitride pottery A diameter of 0.4mm~3.0mm of porcelain ball, bending strength are 900MPa~1200MPa, and fracture toughness scope is 5MPa~6MPa, Hardness is not less than 1380HV.
- 7. the preparation method of high strength alumin ium alloy tubing members according to claim 6, it is characterised in that：The silicon nitride pottery A diameter of 0.5mm~0.8mm of porcelain ball.
- 8. the preparation method of high strength alumin ium alloy tubing members according to claim 1, it is characterised in that：It is described during die sinking Sliding form frame first drives the sliding die to be moved to the direction away from the high strength alumin ium alloy tubing members, then described middle sliding Block drives the upper bolster and the bearing material cylinder to be moved to the direction away from the lower mould and the high strength alumin ium alloy tubing members.
- A kind of 9. preparation facilities of high strength alumin ium alloy tubing members, it is characterised in that：Including lower mould and upper mould, the lower mould is set On fixed die holder, the fixed die holder is fixedly arranged on mould bases, and the lower mould is used to place high strength alumin ium alloy tubing, described high-strength The both sides of aluminium alloy pipe are respectively equipped with a sliding die, and the sliding die can be driven relatively described high-strength aluminium to close by sliding form frame Golden tubing movement；The upper mould is arranged on the downside of upper bolster, and the upper bolster is fixedly arranged on intermediate slider, and the upper bolster is provided with bearing material Cylinder, the bearing material cylinder align with the medium pressure head being slideably positioned on the intermediate slider, the intermediate slider and granule medium Load pipe to be slidably connected, the granule medium loads pipe and can loaded into the bearing material cylinder and the high strength alumin ium alloy tubing Granule medium；It is equipped with the fixed die holder, the sliding die and the upper mould for detecting the high strength alumin ium alloy tube surfaces temperature The infrared temperature measurement apparatus of degree.
- 10. the preparation facilities of high strength alumin ium alloy tubing members according to claim 9, it is characterised in that：The sliding die Frame is slidably connected by sliding guide with the stuck-module being fixedly arranged on the fixed form, the lower mould and the stuck-module It is bolted；Cooling line is equipped with inside the fixed die holder, the lower mould, the sliding die and the upper mould.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711091592.2A CN107597942B (en) | 2017-11-08 | 2017-11-08 | A kind of preparation method and its device of high strength alumin ium alloy tubing members |
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| CN201711091592.2A CN107597942B (en) | 2017-11-08 | 2017-11-08 | A kind of preparation method and its device of high strength alumin ium alloy tubing members |
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| CN107597942B CN107597942B (en) | 2018-12-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110001079A (en) * | 2019-04-28 | 2019-07-12 | 燕山大学 | A kind of carbon fibre pipe fitting preparation facilities and method |
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| JP3206505B2 (en) * | 1997-08-06 | 2001-09-10 | 住友金属工業株式会社 | Hydraulic bulge processing method and hydraulic bulge processing apparatus for metal tube |
| CN101045247A (en) * | 2006-03-31 | 2007-10-03 | (株)星宇Hitech | Hydraulic forming press system and press method thereof |
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| JPH1119729A (en) * | 1997-07-03 | 1999-01-26 | Nissan Motor Co Ltd | Bulging device and bulging method |
| JP3206505B2 (en) * | 1997-08-06 | 2001-09-10 | 住友金属工業株式会社 | Hydraulic bulge processing method and hydraulic bulge processing apparatus for metal tube |
| JP2000246361A (en) * | 1999-03-02 | 2000-09-12 | F Tech:Kk | Hydroforming method of pipe material |
| CN101045247A (en) * | 2006-03-31 | 2007-10-03 | (株)星宇Hitech | Hydraulic forming press system and press method thereof |
| CN201376042Y (en) * | 2009-02-17 | 2010-01-06 | 宝山钢铁股份有限公司 | Hydraulic molding device |
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| CN110001079A (en) * | 2019-04-28 | 2019-07-12 | 燕山大学 | A kind of carbon fibre pipe fitting preparation facilities and method |
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