CN108941305A - For fittings hydraulic formation equipment and technique with small round corner bulge loop - Google Patents
For fittings hydraulic formation equipment and technique with small round corner bulge loop Download PDFInfo
- Publication number
- CN108941305A CN108941305A CN201710383728.0A CN201710383728A CN108941305A CN 108941305 A CN108941305 A CN 108941305A CN 201710383728 A CN201710383728 A CN 201710383728A CN 108941305 A CN108941305 A CN 108941305A
- Authority
- CN
- China
- Prior art keywords
- pipe fitting
- finished product
- end socket
- semi
- shaping dies
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 8
- 239000011265 semifinished product Substances 0.000 claims abstract description 54
- 239000000047 product Substances 0.000 claims abstract description 19
- 238000007493 shaping process Methods 0.000 claims description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000005516 engineering process Methods 0.000 claims description 9
- 238000001125 extrusion Methods 0.000 claims description 4
- 238000009740 moulding (composite fabrication) Methods 0.000 description 16
- 238000010586 diagram Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003908 quality control method Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
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
- B21D26/047—Mould construction
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The present invention is provided to the fittings hydraulic formation equipments with small round corner bulge loop and technique, the endface of upper/lower die to be provided with the groove to indent among mold, for accommodating end socket, the bottom of the groove gradually containing round and smooth cambered surface for being；A positioning groove is set between medium pipeline and end socket main body inside the end socket, for limiting and accommodating the end of semi-finished product pipe fitting, the groove of end socket and mold mutually agrees with, and applies extruding force for double of finished product pipe fitting end；End socket place opposite with cambered surface is the fillet surface of indent, a limit space is formed between the fillet surface of end socket and the cambered surface of upper and lower mould, for limiting the shape after semi-finished product pipe fitting is squeezed, the present invention adopts original interior high equipment, changes forming process and the mould structure of local pipe to realize the small bulge loop feature of tubing products.
Description
Technical field
The present invention relates to for fittings hydraulic formation equipment and technique with small round corner bulge loop, the gold such as steel, aluminium, magnesium are covered
Belong to the plastic forming technology field for the multiple tube that pipe and metal tube and high molecular material are composed.
Background technique
Pipe fitting internal high pressure forming technique are as follows: the pressure generated using high-pressure fluid is filled and serves as punch-pin inside pipe fitting A,
Cavity plate is served as with the mould steel B of shape of product in outside, and experience feeds intake, mold is closed, priming fluid, pressurization, simultaneously axis in pipe fitting
The several stages completion pipe fitting formings of feeding are shaped and are opened to hydraulic cylinder axial direction pusher, wherein according to product and the need of formability
It wants, process successively has intersection.
Current common pipe fitting forming technique is that the internal high pressure forming of high pressure water, interior high-pressure process forming force are injected into pipe
Greatly, usually interior to be pressed in 150-250MPa or so, but under such interior pressure, small fillet does not still shape not come out, limitation
The extensive use of part.
On the other hand, interior high-pressure pipe member is usually similar round, also not can be used as the shape face of positioning, in process
Position bad, pipe fitting is easy movement in position fixing process, can solve orientation problem plus small bulge loop at pipe fitting both ends.
Summary of the invention
The object of the present invention is to provide it is a kind of it is formable go out usually in high-pressure process cannot shape come with small round corner
The equipment of bulge loop, technique, the extrusion molding positioning convex ring at semi-finished product pipe end, play the role of limit, positioning；In order to
Reach above-mentioned purpose, using following technical scheme, for the fittings hydraulic formation equipment with small round corner bulge loop, comprising: finishing die
Tool, press apparatus, the shaping dies includes upper and lower mould, for placing and fixed semi-finished products pipe fitting, the press apparatus packet
Include: for shaping dies apply external force press slide and press platform, for give semi-finished product inside pipe fitting apply internal force
Flood pattern and end socket；The lower die of the shaping dies is fixed on press platform, and the upper mold is fixed on press slide
On, the up and down motion of press slide drives the folding of shaping dies；The end socket is set to two end sides of shaping dies, and being used for will
Shaping dies and the closing of semi-finished product pipe fitting, the end socket are internally provided with medium pipeline, and the both ends of medium pipeline connect outer respectively
Portion low-pressure hydraulic source and semi-finished product pipe fitting nozzle；The endface of the upper/lower die is provided with the groove to indent among mold,
For accommodating end socket, it is round and smooth cambered surface that the bottom of groove is gradually containing；Medium pipeline and end socket main body inside the end socket
Between a positioning groove is set, for limiting and accommodating the end of semi-finished product pipe fitting, the groove of end socket and mold mutually agrees with, for pair
Semi-finished product pipe fitting end applies extruding force；End socket place opposite with cambered surface is the fillet surface of indent, the fillet surface and upper and lower mould of end socket
Cambered surface between form a limit space, for limiting the shape after semi-finished product pipe fitting is squeezed.
Preferably, the end socket is installed on axial oil cylinder, the movement of axial oil cylinder pushing end socket carry out pipe fitting closing and
Pipe fitting end extrusion molding.
Preferably, the locating slot between medium pipeline and end socket main body, groove body bottom have to the step extended out.
Forming technology is additionally provided, S1, the shape according to final products carry out the works such as bend pipe, blank pipe preform to pipe fitting
Sequence obtains the semi-finished product pipe fitting that can be put into shaping dies；After S2, semi-finished product pipe fitting are put into shaping dies, start hydraulic device,
Press slide downlink, shaping dies closure；S3, end socket axial movement seal semi-finished product pipe fitting end；S4, flood pattern are quickly low
Pressure injection water excludes the air of semi-finished product inside pipe fitting；S5, end socket continue the end for being axially moved extruded serni-finished product pipe fitting, partly
Finished product pipe fitting forms bulge loop in the outwardly convex that is squeezed, and bulge loop position is located between the fillet surface of end socket and the cambered surface of upper and lower mould
In limit space；S6, high pressure water, the other places of forming pipe fitting are passed through into pipe.
Preferably, further include having high pressure-retaining system, the medium pressure of semi-finished product inside pipe fitting is kept using high pressure pressure-retaining system
Power, range can be within the scope of 1-400mpa.
Preferably, when semi-finished product pipe fitting is put into shaping dies, shaping dies is stretched out in the end of semi-finished product pipe fitting, and stretch out
Depth of the length not less than the locating slot between end socket and medium pipeline.
Preferably, when end socket axial movement seals semi-finished product pipe fitting end, medium pipeline gos deep into semi-finished product inside pipe fitting, both
Improve the support force that leakproofness also gives semi-finished product pipe fitting.
Preferably, the pressure of the low pressure water is between 1-50MPa.
Preferably, since the fillet surface of the cambered surface of shaping dies endface, end socket endface is all round and smooth indent, institute's shape
At bulge loop also there is small round corner, fillet range minimum can arrive R0.5.
Beneficial effects of the present invention: carry out bend pipe and it is preforming obtain semi-finished product pipe fitting, double of finished product pipe fitting carries out low pressure
Fill the water and seal two-port, then carry out low pressure water injection to guarantee inside pipe fitting pressure, axially push away cylinder push seal head and insert at
Shape goes out small bulge loop, and present patent application adopts original interior high equipment, changes forming process and the mould structure of local pipe to realize
The small bulge loop feature of tubing products.
Detailed description of the invention
Fig. 1 is the structural schematic diagram in present patent application about Forming Equipments；
Fig. 2 is the tubular shape before the small bulge loop of this patent shapes；
Fig. 3 is the tubular shape after the small bulge loop forming of this patent；
Fig. 4 is a kind of schematic diagram of finished product pipe fitting；
Fig. 5 is the schematic diagram of another kind of finished product pipe fitting；
Fig. 6 is the schematic diagram for planting finished product pipe fitting again；
Fig. 7 is process flow chart provided by present patent application；
In figure, 1, semi-finished product pipe fitting；2, lower die；3, upper mold；4, end socket；5, medium pipe fitting；6, axial oil cylinder；P is represented in pipe fitting
The pressure in portion.
Specific embodiment
A kind of Forming Equipments are provided, as shown in Figure 1, comprising: shaping dies, press apparatus, the shaping dies include
Upper and lower mould, for placement and fixed semi-finished products pipe fitting, the press apparatus includes: for applying 200- to shaping dies
The press slide and press platform, flood pattern and envelope for applying internal force to semi-finished product inside pipe fitting of 5000 tons of forming forces
Head；The lower die of the shaping dies is fixed on press platform, and the upper mold is fixed on press slide, above and below press slide
Movement drives the folding of shaping dies；The end socket is set to two end sides of shaping dies, for by shaping dies and half at
The closing of quality control part, the end socket are internally provided with medium pipeline, and the both ends of medium pipeline connect outer low pressure hydraulic power source and half respectively
Finished product pipe fitting nozzle；The endface of the upper/lower die is provided with the groove to indent among mold, for accommodating end socket, definitely
Say it is that end socket end is axially moved when squeezing pipe fitting end and is placed in the groove, the bottom of groove gradually toe-in becomes
Containing round and smooth cambered surface, and the round and smooth cambered surface of upper/lower die is symmetrical, becomes the bowl-shape of a non-close；Inside the end socket
A positioning groove is set between medium pipeline and end socket main body, for limiting and accommodating the end of semi-finished product pipe fitting, end socket and mold
Groove mutually agree with, apply extruding force for double finished product pipe fitting end；End socket place opposite with cambered surface is the fillet surface of indent, envelope
A limit space is formed between the fillet surface of head and the cambered surface of upper and lower mould, for limiting the shape after semi-finished product pipe fitting is squeezed.
Preferably, the end socket is installed on axial oil cylinder, the movement of axial oil cylinder pushing end socket carry out pipe fitting closing and
Extrusion molding is specifically semi-finished product pipe fitting end completely into after the locating slot inside end socket, will be squeezed beyond part
Pressure is squeezed into bulge loop and is located at that ice cup is defined in the cambered surface of shaping dies endface and the fillet surface of end socket endface is formed by
Limit space in, so small bulge loop and limit space play the role of limit and positioning herein.
Preferably, the locating slot between medium pipeline and end socket main body, groove body bottom have to the step extended out.
Preferably, the flood pattern includes: low pressure water fast water injection system, the high pressure of 1-250mpa of 0.1-25mpa
Flood pattern.
Forming technology is additionally provided, S1, the shape according to final products carry out the works such as bend pipe, blank pipe preform to pipe fitting
Sequence obtains the semi-finished product pipe fitting that can be put into shaping dies；After S2, semi-finished product pipe fitting are put into shaping dies, start hydraulic device,
Press slide downlink, shaping dies closure；S3, end socket axial movement seal semi-finished product pipe fitting end；S4, flood pattern are quickly low
Pressure injection water, pressure 0.1-25mpa exclude the air of semi-finished product inside pipe fitting；S5, end socket continue to be axially moved squeeze half at
The end of quality control part, bulge loop position are located in the limit space between the fillet surface of end socket and the cambered surface of upper and lower mould；S6, into pipe
It is passed through high pressure water, the other places of forming pipe fitting.
Preferably, further include having high pressure-retaining system, the medium pressure of semi-finished product inside pipe fitting is kept using high pressure pressure-retaining system
Power, range can be within the scope of 1-400mpa, and inside pipe fitting uses packing pressure, and semi-finished product pipe fitting is in axial oil cylinder pushing mold end socket
Or under die insert people pushes, the material of bulge loop part does not have other places that can go, and can only squeeze out small bulge loop semifinished tube
Part forms bulge loop in the outwardly convex that is squeezed.
Preferably, when semi-finished product pipe fitting is put into shaping dies, shaping dies is stretched out in the end of semi-finished product pipe fitting, and stretch out
Depth of the length not less than the locating slot between end socket and medium pipeline.
Preferably, when end socket axial movement seals semi-finished product pipe fitting end, medium pipeline gos deep into semi-finished product inside pipe fitting, both
Improve the support force that leakproofness also gives semi-finished product pipe fitting.
Preferably, the pressure of the low pressure water is between 1-50MPa.
Preferably, since the fillet surface of the cambered surface of shaping dies endface, end socket endface is all round and smooth indent, institute's shape
At bulge loop also there is small round corner, fillet range minimum can arrive R0.5.
It is round tube, square tube that present patent application, which is not limited to semi-finished product pipe fitting, and the bulge loop of forming is also possible to do not have fillet surface
's.
The principles and effects of present patent application are only illustrated in above-described embodiment, not for limitation this patent Shen
Please.Any person skilled in the art can all carry out above-described embodiment under the spirit and scope without prejudice to present patent application
Modifications and changes.Therefore, such as those of ordinary skill in the art without departing from the revealed essence of present patent application
All equivalent modifications or change completed under mind and technical idea, the claim that should be asked by this patent are covered.
Claims (9)
1. for the fittings hydraulic formation equipment with small round corner bulge loop, comprising: shaping dies, press apparatus, the shaping dies
It include upper and lower mould, for placement and fixed semi-finished products pipe fitting, the press apparatus includes: for applying to shaping dies
The press slide and press platform of external force, flood pattern and end socket for applying internal force to semi-finished product inside pipe fitting；It is described
The lower die of shaping dies is fixed on press platform, and the upper mold is fixed on press slide, the up and down motion band of press slide
The folding of dynamic shaping dies；The end socket is set to two end sides of shaping dies, is used for shaping dies and semi-finished product pipe fitting
Closing, the end socket are internally provided with medium pipeline, and the both ends of medium pipeline connect outer low pressure hydraulic power source and semifinished tube respectively
Part nozzle；It is characterized by: the endface of the upper/lower die is provided with the groove to indent among mold, for accommodating envelope
Head, gradually toe-in becomes round and smooth symmetrical cambered surface for the bottom of upper/lower die groove；Medium pipeline inside the end socket with
A positioning groove is set between end socket main body, for limiting and accommodating the end of semi-finished product pipe fitting, the groove phase contract of end socket and mold
It closes, applies extruding force for double of finished product pipe fitting end；End socket place opposite with cambered surface is the fillet surface of indent, the fillet surface of end socket
A limit space is formed between the cambered surface of upper and lower mould, for limiting the shape after semi-finished product pipe fitting is squeezed.
2. according to claim 1 for the fittings hydraulic formation equipment with small round corner bulge loop, it is characterised in that: the envelope
Head is installed on axial oil cylinder, and axial oil cylinder pushing end socket movement carries out closing and the tube end extrusion molding of pipe fitting.
3. according to claim 2 for the fittings hydraulic formation equipment with small round corner bulge loop, it is characterised in that: medium tube
Locating slot between road and end socket main body, groove body bottom have to the step extended out.
4. the forming technology of Forming Equipments described in any of the above-described claim, it is characterised in that: S1, the shape according to final products
Shape carries out the processes such as bend pipe, blank pipe preform to pipe fitting, obtains the semi-finished product pipe fitting that can be put into shaping dies；S2, semi-finished product
After pipe fitting is put into shaping dies, start hydraulic device, press slide downlink, shaping dies closure；S3, end socket axial movement seal
Semi-finished product pipe fitting end；S4, the water filling of flood pattern quick low voltage, the air of semi-finished product inside pipe fitting is excluded；S5, end socket continue
It is axially moved the end of extruded serni-finished product pipe fitting, semi-finished product pipe fitting forms bulge loop in the outwardly convex that is squeezed, and bulge loop position is located at
In limit space between the fillet surface of end socket and the cambered surface of upper and lower mould；S6, high pressure water is passed through into pipe, forming pipe fitting is other
Place.
5. forming technology according to claim 4, it is characterised in that: further include having high pressure-retaining system, utilize high pressure pressure maintaining
System keeps the pressure medium of semi-finished product inside pipe fitting, and range can be within the scope of 1-400mpa.
6. forming technology according to claim 4, it is characterised in that: in S2, when semi-finished product pipe fitting is put into shaping dies, half
Shaping dies is stretched out in the end of finished product pipe fitting, and the length stretched out is not less than the depth of the locating slot between end socket and medium pipeline
Degree.
7. forming technology according to claim 6, it is characterised in that: in S3, end socket axial movement seals semi-finished product pipe fitting
When end, medium pipeline gos deep into semi-finished product inside pipe fitting, has both improved leakproofness or has given the support force of semi-finished product pipe fitting.
8. forming technology according to claim 4, it is characterised in that: the pressure of the low pressure water is between 1-50MPa.
9. forming technology according to claim 4, it is characterised in that: due to the cambered surface of shaping dies endface, seal head end
Fillet surface at face is all round and smooth indent, and being formed by bulge loop also has small round corner, and fillet range minimum can arrive R0.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710383728.0A CN108941305B (en) | 2017-05-26 | 2017-05-26 | Pipe fitting hydroforming equipment and process for convex ring with small round angle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710383728.0A CN108941305B (en) | 2017-05-26 | 2017-05-26 | Pipe fitting hydroforming equipment and process for convex ring with small round angle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108941305A true CN108941305A (en) | 2018-12-07 |
| CN108941305B CN108941305B (en) | 2023-11-28 |
Family
ID=64494642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710383728.0A Active CN108941305B (en) | 2017-05-26 | 2017-05-26 | Pipe fitting hydroforming equipment and process for convex ring with small round angle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108941305B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005036419A1 (en) * | 2005-07-29 | 2007-02-01 | Tower Automotive Hydroforming Gmbh & Co. Kg | Production of a bulged hollow profile used as a gas generator housing for an airbag arrangement comprises placing a hollow profile into an inner high pressure deforming tool, flattening and further processing |
| CN101332480A (en) * | 2008-06-07 | 2008-12-31 | 桂林电子科技大学 | Simple inside high-pressure forming method |
| CN101927291A (en) * | 2009-06-22 | 2010-12-29 | 宝山钢铁股份有限公司 | Pre-forming method for tube hydroforming and device thereof |
| JP2013158818A (en) * | 2012-02-07 | 2013-08-19 | Nippon Steel & Sumitomo Metal Corp | Method of manufacturing hollow member for welding by hydroforming |
| CN104438542A (en) * | 2014-12-08 | 2015-03-25 | 无锡朗贤汽车组件研发中心有限公司 | Inflatable hot forming and sectional strengthening tube-producing equipment |
| CN105689486A (en) * | 2016-03-14 | 2016-06-22 | 南京航空航天大学 | Multistage continuous large deformation part internal high-pressure forming method and device |
| CN105855350A (en) * | 2016-03-29 | 2016-08-17 | 桂林电子科技大学 | Thin-wall metal pipe impact hydraulic forming method and device |
| CN105945122A (en) * | 2016-07-06 | 2016-09-21 | 燕山大学 | Metal pipe forming equipment and method thereof |
| CN106623580A (en) * | 2017-01-10 | 2017-05-10 | 哈尔滨宇航精创科技有限公司 | Method for manufacturing bathroom water faucet branch pipe by compounding hot extrusion with superplastic bulging |
| CN207057369U (en) * | 2017-05-26 | 2018-03-02 | 无锡朗贤汽车组件研发中心有限公司 | For the fittings hydraulic formation equipment with small round corner bulge loop |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6530252B1 (en) * | 1999-06-21 | 2003-03-11 | Aida Engineering Co., Ltd. | Hydroforming method and hydroforming device |
-
2017
- 2017-05-26 CN CN201710383728.0A patent/CN108941305B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005036419A1 (en) * | 2005-07-29 | 2007-02-01 | Tower Automotive Hydroforming Gmbh & Co. Kg | Production of a bulged hollow profile used as a gas generator housing for an airbag arrangement comprises placing a hollow profile into an inner high pressure deforming tool, flattening and further processing |
| CN101332480A (en) * | 2008-06-07 | 2008-12-31 | 桂林电子科技大学 | Simple inside high-pressure forming method |
| CN101927291A (en) * | 2009-06-22 | 2010-12-29 | 宝山钢铁股份有限公司 | Pre-forming method for tube hydroforming and device thereof |
| JP2013158818A (en) * | 2012-02-07 | 2013-08-19 | Nippon Steel & Sumitomo Metal Corp | Method of manufacturing hollow member for welding by hydroforming |
| CN104438542A (en) * | 2014-12-08 | 2015-03-25 | 无锡朗贤汽车组件研发中心有限公司 | Inflatable hot forming and sectional strengthening tube-producing equipment |
| CN105689486A (en) * | 2016-03-14 | 2016-06-22 | 南京航空航天大学 | Multistage continuous large deformation part internal high-pressure forming method and device |
| CN105855350A (en) * | 2016-03-29 | 2016-08-17 | 桂林电子科技大学 | Thin-wall metal pipe impact hydraulic forming method and device |
| CN105945122A (en) * | 2016-07-06 | 2016-09-21 | 燕山大学 | Metal pipe forming equipment and method thereof |
| CN106623580A (en) * | 2017-01-10 | 2017-05-10 | 哈尔滨宇航精创科技有限公司 | Method for manufacturing bathroom water faucet branch pipe by compounding hot extrusion with superplastic bulging |
| CN207057369U (en) * | 2017-05-26 | 2018-03-02 | 无锡朗贤汽车组件研发中心有限公司 | For the fittings hydraulic formation equipment with small round corner bulge loop |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108941305B (en) | 2023-11-28 |
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