CN110270620A - A kind of pipe fitting inside high-pressure forming method - Google Patents
A kind of pipe fitting inside high-pressure forming method Download PDFInfo
- Publication number
- CN110270620A CN110270620A CN201910558969.3A CN201910558969A CN110270620A CN 110270620 A CN110270620 A CN 110270620A CN 201910558969 A CN201910558969 A CN 201910558969A CN 110270620 A CN110270620 A CN 110270620A
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- Prior art keywords
- lower die
- pipe fitting
- pipe
- upper mold
- transition
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Links
- 238000000034 method Methods 0.000 title claims abstract description 34
- 230000007704 transition Effects 0.000 claims abstract description 60
- 238000000465 moulding Methods 0.000 claims abstract description 16
- 238000007789 sealing Methods 0.000 claims description 26
- 238000006073 displacement reaction Methods 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 229910017435 S2 In Inorganic materials 0.000 claims 1
- 238000007493 shaping process Methods 0.000 abstract description 9
- 230000010355 oscillation Effects 0.000 abstract description 3
- 238000009740 moulding (composite fabrication) Methods 0.000 description 33
- 238000002347 injection Methods 0.000 description 7
- 239000007924 injection Substances 0.000 description 7
- 239000007788 liquid Substances 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002372 labelling Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000000243 solution Substances 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
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 relates to a kind of pipe fitting inside high-pressure forming methods, belong to pipe fitting moulding molding field.Pipe to be formed is carried out internal high pressure forming and obtains target pipe fitting by a kind of pipe fitting inside high-pressure forming method；During entire press molding; obtain the real-time range △ S1 at the fillet of upper die and lower die cross section between pipe and upper die and lower die; meanwhile the real-time range △ S2 at upper mold or lower die at least one transition face between pipe and upper mold or lower die is obtained, obtain intermediate pipe piece cross sectional shape；Transition piece upper mold and transition piece lower die are manufactured according to the intermediate pipe piece cross sectional shape of acquisition；Internal high pressure forming is carried out using gained transition piece upper mold and transition piece lower die, obtains transition fitting；Gained transition fitting is placed in target pipe fitting lower die and carries out internal high pressure forming acquisition target pipe fitting.This method obtains the shape of middle transition pipe fitting, makes transition fitting mold, then middle transition pipe fitting is carried out final shaping, avoids the pressure oscillation as caused by excessive pressure change.
Description
Technical field
The present invention relates to a kind of pipe fitting inside high-pressure forming methods, belong to pipe fitting moulding molding field.
Background technique
With the continuous development of human society, energy crisis and environmental pollution have become two that the whole world is faced primarily
Problem.Automobile, as current family and " necessity " of social activities, production and usage quantity increase year after year.To meet environmental protection
With energy-efficient needs, the lightweight of automobile has become the trend of world car development.
The lightweight of automobile reduces reorganizing and outfit for automobile under the premise of guaranteeing the intensity and security performance of automobile as much as possible
Quality reduces fuel consumption to improve the dynamic property of automobile, reduces exhaust pollution.The light body structure of automobile includes that hollow become cuts
Face components are that will weld again after two half formings once again, complex process, and quality is difficult to ensure, institute in traditional handicraft
The intensity for obtaining part weld is also difficult to ensure.
" internal high pressure forming " is emerging forming technique, and pipe combines both ends axial load to send out in the case where internal high pressure
Raw bulging deformation, the final die forming that is bonded is target components.Internal high pressure forming includes forming and two stages of shaping.Whole
The shape stage is that the pipe shaped substantially is carried out refine, is especially bonded fillet part, the pressure that this stage needs
It is larger, compared with pressure needed for shaping stage, there is biggish gap to be therefore in progressive forming, when forming is with shaping transition
The pressure change of formation and fluctuation have adverse effect shaping, cause to shape the excessive caused material breaks of not good enough or pressure
Deng.
Summary of the invention
The object of the present invention is to provide a kind of pipe fitting inside high-pressure forming method, this method obtains the shape of middle transition pipe fitting
Shape makes transition fitting mold, then middle transition pipe fitting is carried out final shaping, avoids as caused by excessive pressure change
Pressure oscillation.
A kind of pipe fitting inside high-pressure forming method, the manufacturing process include the following steps:
Pipe to be formed is placed in target pipe fitting lower die by S1, molds upper mold and lower die, using the first sealing punch and
Press molding after the sealing of second sealing punch, obtains target pipe fitting；During entire press molding, it is horizontal to obtain upper die and lower die
Real-time range △ S1 at the fillet of 4, section between pipe and upper die and lower die, meanwhile, obtain upper mold or lower die at least one mistake
Cross the real-time range △ S2 at face between pipe and upper mold or lower die；
S2 obtains the numerical value of the △ S1 when △ S2 is 0, is obtained according to the numerical value of △ S1 when △ S2 is 0, intermediate pipe piece is cut
Face shape；Optionally, step S1 and S2 are repeated, the average value of the numerical value of △ S1 is obtained；
S3 manufactures transition piece upper mold and transition piece lower die according to the intermediate pipe piece cross sectional shape of acquisition；Utilize gained transition
Part upper mold and transition piece lower die carry out internal high pressure forming, obtain transition fitting；Gained transition fitting is placed in target pipe fitting lower die
In, upper mold and lower die are molded, using gradually press molding after the first sealing punch and the sealing of the second sealing punch, obtains target
Pipe fitting.
Pipe fitting inside high-pressure forming method of the present invention, target pipe fitting section are positive four side that four angles are fillet
Shape.
Pipe fitting inside high-pressure forming method of the present invention, " transition face " the feeling the pulse with the finger-tip mark pipe fitting section regular quadrangle and circle
Transition position between pipe is formed by inclined-plane.
Preferably, in the step S1, at the same obtain at upper mold or lower die at least one critical surface pipe and upper mold or under
Real-time range △ S3 between mould；And in step S2, the numerical value of the △ S1 when △ S2 and △ S3 are 0 is obtained, according to △ S1
Numerical value obtain △ S2 and △ S3 when being 0, intermediate pipe piece cross sectional shape.
Pipe fitting inside high-pressure forming method of the present invention, " critical surface " feeling the pulse with the finger-tip mark pipe fitting section regular quadrangle is close to mistake
Cross the position in face.
Preferably, the △ S1, △ S2 and △ S3 are passed by being set to the displacement of opposite position in upper mold or lower die
Sensor obtains.
The invention has the benefit that pipe fitting inside high-pressure forming method of the present invention passes through monitoring pipe fitting whole deformation mistake
Journey obtains the critical state between forming and two stages of shaping, obtains the shape of middle transition pipe fitting, makes transition fitting mould
Tool, then middle transition pipe fitting is subjected to final shaping, avoid the pressure oscillation as caused by excessive pressure change.This method can
To weaken since forming and two staged pressure gaps of shaping are big, great fluctuation process caused by great pressurization avoids the processed of part
The bad or rupture event of caused fitting in journey.
Detailed description of the invention
Fig. 1 is initial pipe and target pipe fitting mold schematic diagram in pipe fitting inside high-pressure forming method of the present invention；
Fig. 2 is that pipe and target pipe fitting mold are illustrated in process in pipe fitting inside high-pressure forming method of the present invention
Figure；
Fig. 3 is displacement sensor position view in pipe fitting inside high-pressure forming method of the present invention；
Fig. 4 is section fillet displacement sensor position view at A-A described in Fig. 1；
Fig. 5 is initial pipe and target pipe fitting mold sections schematic diagram in pipe fitting inside high-pressure forming method of the present invention；
Fig. 6 is that pipe shows with target pipe fitting mold sections in process in pipe fitting inside high-pressure forming method of the present invention
It is intended to；
Fig. 7 is intermediate pipe piece cross sectional shape in pipe fitting inside high-pressure forming method of the present invention；
Fig. 8 is the partial enlarged view of Fig. 6；
Appended drawing reference is as follows: 1, target pipe fitting upper mold, 2, target pipe fitting lower die, the 3, first sealing punch, the 4, first fluid injection
Pipe, the 5, second sealing punch, the 6, second liquid injection pipe, 7, pipe, 8, critical surface displacement sensor, 9, transition face displacement sensor,
10, intermediate pipe piece section, 11, fillet displacement sensor, 201, transition face, 202, critical surface.
Specific embodiment
Technical solution of the present invention is clearly and completely described in following embodiments that are related to, it is clear that described implementation
Mode is only section Example of the present invention.Based on the embodiments of the present invention, those of ordinary skill in the art are not making
Every other embodiment obtained, shall fall within the protection scope of the present invention under the premise of creative work.
Pipe fitting inside high-pressure forming method of the present invention can carry out in the internal high pressure forming equipment that the prior art provides, institute
Stating target pipe fitting section is the regular quadrangle that four angles are fillet.The equipment includes target pipe fitting upper mold 1, target pipe fitting lower die
2, the first sealing punch 3, the first liquid injection pipe 4, the second sealing punch 5, the second liquid injection pipe 6 controls two sealing punch in axial direction
The mobile control device in direction, the high pressure liquid source being connected with the first liquid injection pipe 4 and the second liquid injection pipe 6 and pressurization injection device, control
The press machine that target pipe fitting upper mold 1 processed molds, several displacement sensors, displacement sensor includes critical surface, transition face, fillet three
It is as shown in Figure 3 and Figure 4 that position is specifically arranged in the displacement sensor of a position.According to Fig.2, in entire interior pressing formation mistake
Cheng Zhong, pipe middle section region are first bonded mold, and subsequent two end tube section is gradually bonded mold, and subsequent fitting part is cut for target pipe fitting
Transition position between face regular quadrangle and round pipe is formed by inclined-plane, i.e. transition face, as shown in figure 1 201 labeling position.It is preferred that
Ground can also be used displacement sensor and determine pipe fitting at critical surface to guarantee that the pipe fitting part that section is regular quadrangle is bonded completely
With the laminating degree of mold, 202 labeling position, the setting position of critical surface displacement sensor of the present invention are most as shown in figure 1
It measures close to bending place, can preferably react pipe fitting fitting situation.Utilize displacement sensor real-time monitoring △ S1, △ S2 and △ S3
Value.When critical surface 202 and transition face 201 are bonded mold, △ S2 and △ S3 are 0.When △ S2/ △ S2 and △ S3 reach 0
When, mold is not bonded at fillet, △ S1 is not also 0, i.e., apart from die corner there are also certain distance, distance is pipe at fillet
△ S1 can be calculated, in this case middle transition pipe according to the △ S1 and target pipe fitting radius of corner measured by geometrical relationship
The radius of corner value of part, and then entire middle transition pipe fitting cross sectional shape is obtained, transition piece is manufactured according to resulting cross sectional shape
Upper mold and transition piece lower die.It carries out carrying out internal high pressure forming by technique using the transition piece upper mold and transition piece lower die of acquisition, obtain
Obtain middle transition pipe fitting.Gained middle transition pipe fitting is placed in target pipe fitting upper die and lower die, is finally shaped, final
In forming, the deformation of pipe fitting is small, and the highly pressurised liquid that need to be injected is small in size, and the sealing punch axial internal clearance of two sides is small, avoids
The generation of great fluctuation process.
Embodiment 1
A kind of pipe fitting inside high-pressure forming method, the manufacturing process include the following steps:
Pipe 7 to be formed is placed in target pipe fitting lower die 2 by S1, molds upper mold 1 and lower die 2, is rushed using the first sealing
First 3 and second sealing punch 5 seal after press molding, obtain target pipe fitting；During entire press molding, upper mold 1 is obtained
And the real-time range △ S1 at the fillet of lower die 2 cross section 4 between pipe 7 and upper mold 1 and lower die 2, meanwhile, obtain upper mold 1 or
Real-time range △ S2 at 2 one transition faces 201 of lower die between pipe 7 and upper mold 1 or lower die 2；
S2 obtains the numerical value of the △ S1 when △ S2 is 0, is obtained according to the numerical value of △ S1 when △ S2 is 0, intermediate pipe piece is cut
Face shape, the intermediate pipe piece cross sectional shape can calculate gained according to geometrical relationship；It repeats step S1 and S2 five times, obtains △ S1
Numerical value average value, to avoid error；
S3 manufactures transition piece upper mold and transition piece lower die according to the intermediate pipe piece cross sectional shape of acquisition；Utilize gained transition
Part upper mold and transition piece lower die carry out internal high pressure forming, obtain transition fitting；Gained transition fitting is placed in target pipe fitting lower die 2
In, upper mold 1 and lower die 2 are molded, using gradually press molding after the first sealing punch 3 and the sealing of the second sealing punch 5, is obtained
Target pipe fitting.
Embodiment 2
A kind of pipe fitting inside high-pressure forming method, the manufacturing process include the following steps:
Pipe 7 to be formed is placed in target pipe fitting lower die 2 by S1, molds upper mold 1 and lower die 2, is rushed using the first sealing
First 3 and second sealing punch 5 seal after press molding, obtain target pipe fitting；During entire press molding, upper mold 1 is obtained
And the real-time range △ S1 at the fillet of lower die 2 cross section 4 between pipe 7 and upper mold 1 and lower die 2, meanwhile, obtain upper mold 1 one
Real-time range △ S2 at a transition face 201 between pipe 7 and upper mold 1 or lower die 2；1 one critical surfaces 202 of upper mold are obtained simultaneously
Locate the real-time range △ S3 between pipe 7 and upper mold 1
S2 obtains the numerical value of the △ S1 when △ S2 and △ S3 are 0, obtains △ S2 and △ S3 according to the numerical value of △ S1 and is
When 0, intermediate pipe piece cross sectional shape, the intermediate pipe piece cross sectional shape can calculate gained according to geometrical relationship；Repeat step S1 and
S2 five times, the average value of the numerical value of △ S1 is obtained, to avoid error；
S3 manufactures transition piece upper mold and transition piece lower die according to the intermediate pipe piece cross sectional shape of acquisition；Utilize gained transition
Part upper mold and transition piece lower die carry out internal high pressure forming, obtain transition fitting；Gained transition fitting is placed in target pipe fitting lower die 2
In, upper mold 1 and lower die 2 are molded, using gradually press molding after the first sealing punch 3 and the sealing of the second sealing punch 5, is obtained
Target pipe fitting.
Claims (3)
1. a kind of pipe fitting inside high-pressure forming method, the manufacturing process include the following steps:
Pipe to be formed (7) is placed in target pipe fitting lower die (2) by S1, molds upper mold (1) and lower die (2), close using first
Press molding after envelope formed punch (3) and the second sealing punch (5) sealing, obtains target pipe fitting；During entire press molding, obtain
The real-time range △ S1 at upper mold (1) and lower die (2) cross section 4 fillet between pipe (7) and upper mold (1) and lower die (2) is taken,
Meanwhile it obtaining at upper mold (1) or lower die (2) at least one transition face (201) between pipe (7) and upper mold (1) or lower die (2)
Real-time range △ S2；
S2 obtains the numerical value of the △ S1 when △ S2 is 0, is obtained according to the numerical value of △ S1 when △ S2 is 0, intermediate pipe piece section shape
Shape；Optionally, step S1 and S2 are repeated, the average value of the numerical value of △ S1 is obtained；
S3 manufactures transition piece upper mold and transition piece lower die according to the intermediate pipe piece cross sectional shape of acquisition；Using on gained transition piece
Mould and transition piece lower die carry out internal high pressure forming, obtain transition fitting；Gained transition fitting is placed in target pipe fitting lower die (2)
In, upper mold (1) and lower die (2) is molded, is gradually pressurizeed after being sealed using the first sealing punch (3) and the second sealing punch (5)
Forming obtains target pipe fitting.
2. according to the method described in claim 1, it is characterized in that, in the step S1, while obtaining upper mold (1) or lower die (2)
Real-time range △ S3 at least one critical surface (202) between pipe (7) and upper mold (1) or lower die (2)；And in step S2
In, the numerical value of the △ S1 when △ S2 and △ S3 are 0 is obtained, it is intermediate when being 0 according to the numerical value of △ S1 acquisition △ S2 and △ S3
Pipe fitting cross sectional shape.
3. according to the method described in claim 1, it is characterized in that, the △ S1, △ S2 and △ S3 are by being set to upper mold (1)
Or the displacement sensor of opposite position obtains in lower die (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910558969.3A CN110270620B (en) | 2019-06-26 | 2019-06-26 | High-pressure forming method in pipe fitting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910558969.3A CN110270620B (en) | 2019-06-26 | 2019-06-26 | High-pressure forming method in pipe fitting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110270620A true CN110270620A (en) | 2019-09-24 |
| CN110270620B CN110270620B (en) | 2021-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910558969.3A Active CN110270620B (en) | 2019-06-26 | 2019-06-26 | High-pressure forming method in pipe fitting |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113042606A (en) * | 2019-12-28 | 2021-06-29 | 烟台新科钢结构有限公司 | Process and equipment for manufacturing model-shaped steel pipe by steel pipe internal expansion method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3611768A (en) * | 1969-06-30 | 1971-10-12 | Otsuya Tekko Kk | Bulging apparatus of metallic pipes |
| JPS5192774A (en) * | 1975-02-12 | 1976-08-14 | ||
| JP3389823B2 (en) * | 1997-05-30 | 2003-03-24 | トヨタ自動車株式会社 | Pulsation damping structure of pressure fluid piping |
| CN1711142A (en) * | 2002-11-08 | 2005-12-21 | 住友金属工业株式会社 | Profile element pipe for hydraulic bulging, hydraulic bulging device and method using the element pipe, and hydraulically bulged product |
| CN202438586U (en) * | 2012-03-02 | 2012-09-19 | 张家港合瑞车桥有限公司 | Hydraulic bulging pipe end sealing device |
| CN102806248A (en) * | 2012-08-06 | 2012-12-05 | 哈尔滨工业大学 | Device and method for testing real-time changes of fillet radius along with internal pressure in internal high-pressure forming process |
-
2019
- 2019-06-26 CN CN201910558969.3A patent/CN110270620B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3611768A (en) * | 1969-06-30 | 1971-10-12 | Otsuya Tekko Kk | Bulging apparatus of metallic pipes |
| JPS5192774A (en) * | 1975-02-12 | 1976-08-14 | ||
| JP3389823B2 (en) * | 1997-05-30 | 2003-03-24 | トヨタ自動車株式会社 | Pulsation damping structure of pressure fluid piping |
| CN1711142A (en) * | 2002-11-08 | 2005-12-21 | 住友金属工业株式会社 | Profile element pipe for hydraulic bulging, hydraulic bulging device and method using the element pipe, and hydraulically bulged product |
| CN202438586U (en) * | 2012-03-02 | 2012-09-19 | 张家港合瑞车桥有限公司 | Hydraulic bulging pipe end sealing device |
| CN102806248A (en) * | 2012-08-06 | 2012-12-05 | 哈尔滨工业大学 | Device and method for testing real-time changes of fillet radius along with internal pressure in internal high-pressure forming process |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113042606A (en) * | 2019-12-28 | 2021-06-29 | 烟台新科钢结构有限公司 | Process and equipment for manufacturing model-shaped steel pipe by steel pipe internal expansion method |
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| CN110270620B (en) | 2021-02-19 |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20210128 Address after: 266700 West of Zhuzhu Road, Gulan Town, Pingdu City, Qingdao City, Shandong Province Applicant after: QINGDAO CHANGHUI PIPE INDUSTRY Co.,Ltd. Address before: 116000 room 702, west side, 7th floor, 1 Gaoxin street, Dalian hi tech Industrial Park, Liaoning Province Applicant before: Dalian Ruizheng Technology Co.,Ltd. |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
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Denomination of invention: A high pressure forming method in pipe fittings Effective date of registration: 20211230 Granted publication date: 20210219 Pledgee: Qingdao Dingtai Financing Guarantee Co.,Ltd. Pledgor: QINGDAO CHANGHUI PIPE INDUSTRY Co.,Ltd. Registration number: Y2021370010147 |
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Date of cancellation: 20230206 Granted publication date: 20210219 Pledgee: Qingdao Dingtai Financing Guarantee Co.,Ltd. Pledgor: QINGDAO CHANGHUI PIPE INDUSTRY Co.,Ltd. Registration number: Y2021370010147 |
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Denomination of invention: A Method for High Pressure Forming of Pipe Fittings Effective date of registration: 20230323 Granted publication date: 20210219 Pledgee: Qingdao Dingtai Financing Guarantee Co.,Ltd. Pledgor: QINGDAO CHANGHUI PIPE INDUSTRY Co.,Ltd. Registration number: Y2023370010030 |
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Granted publication date: 20210219 Pledgee: Qingdao Dingtai Financing Guarantee Co.,Ltd. Pledgor: QINGDAO CHANGHUI PIPE INDUSTRY Co.,Ltd. Registration number: Y2023370010030 |
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Denomination of invention: A high-pressure forming method for pipe fittings Granted publication date: 20210219 Pledgee: Taiping Property Insurance Co.,Ltd. Qingdao Branch Pledgor: QINGDAO CHANGHUI PIPE INDUSTRY Co.,Ltd. Registration number: Y2024370010033 |
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