CN114618933A - Combined type inflation sealing method and device for pipe stamping deformation process - Google Patents
Combined type inflation sealing method and device for pipe stamping deformation process Download PDFInfo
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- CN114618933A CN114618933A CN202210196148.1A CN202210196148A CN114618933A CN 114618933 A CN114618933 A CN 114618933A CN 202210196148 A CN202210196148 A CN 202210196148A CN 114618933 A CN114618933 A CN 114618933A
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- 238000007789 sealing Methods 0.000 title claims abstract description 212
- 238000000034 method Methods 0.000 title claims abstract description 37
- 230000008569 process Effects 0.000 title claims abstract description 23
- 239000007787 solid Substances 0.000 claims abstract description 43
- 229920002943 EPDM rubber Polymers 0.000 claims description 3
- 229920000459 Nitrile rubber Polymers 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims description 3
- 229920001973 fluoroelastomer Polymers 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 claims description 2
- 238000004891 communication Methods 0.000 claims 1
- 208000032825 Ring chromosome 2 syndrome Diseases 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 208000032826 Ring chromosome 3 syndrome Diseases 0.000 description 7
- 239000000463 material Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
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- 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
- B21D26/045—Closing or sealing means
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- Engineering & Computer Science (AREA)
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- Gasket Seals (AREA)
Abstract
The invention relates to a combined type inflation sealing method and device for a pipe stamping deformation process, and belongs to the technical field of pipe stamping deformation sealing. A combined type inflation sealing method for a pipe stamping deformation process is characterized by comprising the following steps of: the sealing punch comprises a punch body, the punch body is of a stepped structure consisting of a guide section and a connecting section, an inflation duct is axially arranged on the punch body, an annular sealing groove is formed in the outer wall of the guide section, an inflation hole is formed in the bottom of the sealing groove, an inflation sealing ring is arranged in the sealing groove, and a solid sealing ring is arranged in the sealing groove and sleeved outside the inflation sealing ring; and step two, installing a punch and inflating for sealing, inserting the sealing punch into the end part of the pipe through a hydraulic cylinder, wherein the axis of the sealing punch is overlapped with the axis of the pipe when the sealing punch is inserted, and inflating the inflatable sealing ring to ensure that the outer wall of the solid sealing ring is attached to the inner wall of the pipe to realize sealing.
Description
Technical Field
The invention relates to a combined type inflation sealing method and device for a pipe stamping deformation process, and belongs to the technical field of pipe stamping deformation sealing.
Background
The pipe pressurizing and pressing process is to apply high pressure gas and axial feed to the pipe material as blank to make the pipe material deform plastically to fill the mold cavity and form required parts. Therefore, the sealing effect of the inner walls at the two sides of the pipe end is the key for ensuring the stable internal pressure of the pipe and the smooth implementation of the process.
Conventional tube end inner wall seals are either punch pin positive seals or O-ring seals. The rigid sealing of the punch is realized by inserting the conical punch into the tube blank to enable the tube end to generate certain deformation to be tightly attached with the conical punch, but the rigid sealing effect is disposable and the same tube end cannot be repeatedly sealed. The O-shaped sealing ring is used for sealing, the O-shaped sealing ring with a certain interference magnitude is pushed into the tube blank, the O-shaped ring is tightly attached to the inner wall of the tube to realize sealing, but in the process of pushing the O-shaped sealing ring into the tube, the sealing ring can rub against the inner wall of the tube to cause the sealing ring to be worn, and the sealing effect is reduced. Therefore, how to provide a reliable and stable tube end seal is a problem that is always troubled by those skilled in the art. In addition, there is another problem of sealing difficulty or even failure due to non-uniform initial roundness of the tubing.
Disclosure of Invention
Aiming at the problems in the prior art, the combined inflation sealing method for the pipe stamping deformation process is provided, and a corresponding combined inflation sealing device is provided for the sealing method. The pipe sealing device has the advantages that the sealing with the inner wall of the pipe can be realized through the expansion of the sealing ring under the condition that the sealing ring is not abraded, and the pipe sealing device can be used for sealing the pipe with the non-uniform roundness of the pipe end.
The invention solves the technical problems through the following technical scheme:
a combined type inflation sealing method for a pipe stamping deformation process is characterized in that,
step one, selecting a sealing punch: the sealing punch comprises a punch body, the punch body is of a stepped structure consisting of a guide section and a connecting section, an inflation hole channel is axially arranged on the punch body, an annular sealing groove is formed in the outer wall of the guide section, an inflation hole is formed in the bottom of the sealing groove and is a stepped hole, the inflation hole channel is communicated with the inflation hole, an inflation sealing ring is installed in the sealing groove, and a solid sealing ring is installed in the sealing groove and sleeved outside the inflation sealing ring; the diameter of the guide section is smaller than the inner diameter 2 lambda of the pipe, lambda is 0.5-1.0 mm, the outer diameter of the solid sealing ring is smaller than the inner diameter 2 delta of the pipe, and lambda +0.1 is not less than delta and not more than lambda +0.8 mm;
and step two, installing a punch and inflating for sealing, inserting the sealing punch into the end part of the pipe through a hydraulic cylinder, wherein the axis of the sealing punch is overlapped with the axis of the pipe when the sealing punch is inserted, inflating the inflatable sealing ring through an inflatable hole of the sealing punch, expanding the inflatable sealing ring, expanding the solid sealing ring to the notch of the sealing groove, and attaching the outer wall of the solid sealing ring to the inner wall of the pipe to realize sealing.
Through the steps, the end sealing process of the pipe can adapt to the condition that the pipe is deformed slightly to cause the inner diameter of the pipe to be out of round, meanwhile, friction between the solid sealing ring and the inner wall of the pipe is reduced, and damage to the solid sealing ring is reduced.
The technical scheme has the advantages that: before the sealing punch is inserted into the pipe, an inflatable sealing ring is placed in a sealing groove of the sealing punch, the left side and the right side of the inflatable sealing ring are in contact with the sealing groove, then the solid sealing ring is also placed in the sealing groove, the inner side of the solid sealing ring is in contact with the outer side of the inflatable sealing ring, and the left side and the right side are in contact with the sealing groove; then, the sealing punch is moved along the axial direction through the hydraulic cylinder, the sealing punch is inserted into the pipe, gas is filled into the inflatable sealing ring through the inflatable pore channel, the inflatable sealing ring expands along the radial direction under the action of the gas pressure through the control of an increasing system, the extrusion effect is generated on the solid sealing ring, the solid sealing ring expands along the radial direction, the outer side of the solid sealing ring is in contact with the inner wall of the pipe and is tightly attached together, and therefore reliable sealing is achieved. During the period, the expansion deformation of the solid sealing ring can be nonuniform along the circumferential direction, so that the reliable sealing of the pipe with poor roundness of the end part can be realized; the inflatable seal ring can also ensure the sealing of the sealing groove while the solid seal ring is expanded outwards.
On the basis of the technical scheme, the application makes the following improvements and improvements on the technical scheme:
further, the pressure intensity of the gas for inflating the inflatable sealing ring is 5-15 MPa.
The technical characteristics have the beneficial effects in the application that: the sealing device can achieve the expected sealing effect under the pressure of 5-15 MPa, and meanwhile, can ensure that the position of the sealing punch does not change under the condition of pressurizing in the pipe, and ensures the production safety.
Further, the solid sealing ring is a rubber sealing ring made of any one of nitrile rubber, fluororubber or ethylene propylene diene monomer, and the width of the solid sealing ring is equal to that of the sealing groove; the height H of the sealing groove is 15.0-30.0 mm, and the width D of the sealing groove is 10.0-25.0 mm.
Further, the inner wall of the solid sealing ring is attached to the outer wall of the inflatable sealing ring in an initial state.
The technical characteristics are that the whole sealing effect can be improved by controlling the initial installation state of the sealing ring.
In order to cooperate with the implementation of the above sealing method, the application also provides a corresponding sealing punch:
the utility model provides a combined type inflatable sealing device for tubular product stamping deformation technology, its characterized in that, including sealed drift, sealed drift includes the drift body, and the drift body is the stair structure of compriseing guide section and linkage segment, and the axial of drift body is provided with the inflation pore, is provided with annular sealed recess on the outer wall of guide section, and the bottom of sealed recess is provided with aerifys the hole, aerifys the hole for the stair hole, and inflatable seal installs in sealed recess, and solid sealing ring installs in sealed recess and the suit is outside inflatable seal.
Furthermore, the height H of the sealing groove is 15.0-30.0 mm, and the width D of the sealing groove is 10.0-25.0 mm.
Further, the distance L between the front end face of the punch body and the front wall of the sealing groove is 10.0-30.0 mm.
Furthermore, the width of the solid sealing ring is 10.0-25.0 mm.
Further, the outer diameter of the solid seal ring is equal to the outer diameter- (lambda-delta) of the guide section.
Further, the inflatable sealing ring comprises an inflatable sealing bag body and an inflation tube arranged on the inner ring of the inflatable sealing bag body, and the inflation tube is in sealing fit with the inflation hole.
Foretell inflatable seal device can be through aerifing to inflatable seal circle in, utilizes the guide effect of sealed recess, and inflatable seal circle outwards expands solid seal circle, realizes sealed to the tubular product inner chamber, has reduced the friction that produces when solid seal circle inserts tubular product, can not cause the damage to solid seal circle, improves sealed effect, and use that can relapse.
Drawings
FIG. 1 is a schematic view of a combined inflatable sealing device and a tube mounting structure for a tube stamping deformation process according to the present application;
FIG. 2 is a schematic perspective view of a combined inflatable sealing device for a tube stamping deformation process;
FIG. 3 is a cross-sectional view of FIG. 2;
FIG. 4 is a schematic view of the conditions for selecting a sealing punch according to the pipe;
FIG. 5 is a perspective view of the punch body of the sealing punch;
FIG. 6 is a schematic perspective view of the inflatable sealing ring;
fig. 7 is a sectional view at the inflation tube of the inflatable gasket.
The reference numbers are recorded as follows: the sealing punch-1, the guide section-1.1, the sealing groove-1.2, the connecting section-1.3, the inflation hole-1.4, the inflation hole-1.5, the solid sealing ring-2, the inflation sealing ring-3, the air-tight bag-3.1, the inflation tube-3.2 and the pipe-10.
Detailed Description
The following examples are only for illustrating the technical solutions described in the claims with reference to the drawings, and are not intended to limit the scope of the claims.
A combined type inflation sealing method for a pipe stamping deformation process,
step one, selecting a sealing punch:
with reference to fig. 1-7, the sealing punch 1 comprises a punch body, the punch body is of a stepped structure consisting of a guide section 1.1 and a connecting section 1.3, an inflation duct 1.4 is axially arranged on the punch body, an annular sealing groove 1.2 is arranged on the outer wall of the guide section 1.1, an inflation hole 1.5 is arranged at the bottom of the sealing groove 1.2, the inflation hole 1.5 can be the bottom of a plurality of uniform re-sealing grooves 1.2, the inflation hole 1.5 is a stepped hole, an inflation sealing ring 3 is arranged in the sealing groove 1.2, and a solid sealing ring 2 is arranged in the sealing groove 1.2 and sleeved outside the inflation sealing ring 3; wherein the height H of the sealing groove 1.2 is 15.0-30.0 mm, and the width D is 10.0-25.0 mm; the width of the solid sealing ring 2 is 10.0-25.0 mm, and the outer diameter of the solid sealing ring 2 is equal to the outer diameter- (lambda-delta) of the guide section 1.1; the distance L between the front end face of the punch body and the front wall of the sealing groove 1.2 is 10.0-30.0 mm; the inflatable sealing ring 3 comprises an inflatable sealing bag body 3.1 and an inflation tube 3.2 arranged on the inner ring of the inflatable sealing bag body 3.1, and the inflation tube 3.2 is in sealing fit with the inflation hole 1.5.
The diameter of the guide section 1.1 is smaller than the inner diameter 2 lambda of the pipe, lambda is 0.5-1.0 mm, the inner diameter of the guide section is smaller than the inner diameter of the pipe, so that the guide section can be easily inserted into the pipe, meanwhile, for the pipe with insufficient roundness, a sealing punch can be easily inserted into the pipe, the precision requirement of the pipe is reduced, the outer diameter of the solid sealing ring 2 is smaller than the inner diameter 2 delta of the pipe 10, and lambda +0.1 is not less than delta and not more than lambda +0.8 mm;
wherein, the solid sealing ring 2 is a rubber sealing ring made of any one of nitrile rubber, fluororubber or ethylene propylene diene monomer;
step two, installing a punch and inflating for sealing, inserting the sealing punch 1 into the end part of the pipe 10 through a hydraulic cylinder, wherein when the sealing punch is inserted, the axis of the sealing punch 2 is overlapped with the axis of the pipe 10, inflating the inflatable sealing ring 3 through an inflating hole channel 1.4 of the sealing punch 1, the gas pressure is 5-15 MPa, the inflatable sealing ring 3 expands, the solid sealing ring 2 is expanded to a notch of the sealing groove 1.2, and the outer wall of the solid sealing ring 2 is attached to the inner wall of the pipe to realize sealing; the inner wall of the solid sealing ring 2 is attached to the outer wall of the inflatable sealing ring 3 in an initial state.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A combined type inflation sealing method for a pipe stamping deformation process is characterized in that,
step one, selecting a sealing punch: the sealing punch (1) comprises a punch body, the punch body is of a stepped structure consisting of a guide section (1.1) and a connecting section (1.3), an inflation hole (1.4) is axially arranged on the punch body, an annular sealing groove (1.2) is formed in the outer wall of the guide section (1.1), an inflation hole (1.5) is formed in the bottom of the sealing groove (1.2), the inflation hole (1.5) is a stepped hole, an inflation sealing ring (3) is installed in the sealing groove (1.2), and a solid sealing ring (2) is installed in the sealing groove (1.2) and sleeved outside the inflation sealing ring (3); the diameter of the guide section (1.1) is smaller than the inner diameter 2 lambda of the pipe (10), lambda is 0.5-1.0 mm, the outer diameter of the solid sealing ring (2) is smaller than the inner diameter 2 delta of the pipe (10), and lambda +0.1 is not less than delta and not more than lambda +0.8 mm;
and step two, installing a punch and inflating for sealing, inserting the sealing punch (1) into the end part of the pipe (10) through a hydraulic cylinder, wherein when the sealing punch is inserted, the axis of the sealing punch (1) is overlapped with the axis of the pipe (10), inflating the inflatable sealing ring (3) through the inflatable hole (1.4) of the sealing punch (1), expanding the inflatable sealing ring (3), expanding the solid sealing ring (2) to the notch of the sealing groove (1.2), and attaching the outer wall of the solid sealing ring (2) to the inner wall of the pipe (10) to realize sealing.
2. The combined type inflation sealing method for the pipe stamping deformation process according to claim 1, wherein the pressure of the gas for inflating the inflation sealing ring (1.3) is 5-15 MPa.
3. The combined type inflation sealing method for the pipe stamping deformation process according to claim 1, wherein the solid sealing ring (2) is a rubber sealing ring made of any one of nitrile rubber, fluororubber or ethylene propylene diene monomer, and the width of the solid sealing ring (2) is equal to the width of the sealing groove (1.2); the height H of the sealing groove (1.2) is 15.0-30.0 mm, and the width D is 10.0-25.0 mm.
4. The combined pneumatic sealing method for the pipe stamping deformation process according to claim 3, characterized in that the inner wall of the solid sealing ring (2) is attached to the outer wall of the pneumatic sealing ring (3) in the initial state.
5. The utility model provides a combined type inflatable sealing device for tubular product stamping deformation technology, a serial communication port, including sealed drift (1), sealed drift (1) includes the drift body, the drift body is the stair structure of constituteing by direction section (1.1) and linkage segment (1.3), the axial of drift body is provided with inflatable duct (1.4), be provided with annular sealed recess (1.2) on the outer wall of direction section (1.1), the bottom of sealed recess (1.2) is provided with aerifys hole (1.5), aerify hole (1.5) are the stair hole, inflatable sealing ring (3) are installed in sealed recess (1.2), solid sealing ring (2) are installed in sealed recess (1.2) and the suit is outside inflatable sealing ring (3).
6. The combined type air inflation sealing device for the pipe stamping deformation process is characterized in that the height H of the sealing groove (1.2) is 15.0-30.0 mm, and the width D is 10.0-25.0 mm.
7. The combined type inflation sealing device for the tube stamping deformation process according to claim 6, wherein the distance L between the front end face of the punch body and the front wall of the sealing groove (1.2) is 10.0-30.0 mm.
8. The combined type inflation sealing device for the pipe stamping deformation process according to claim 6, wherein the width of the solid sealing ring (2) is 10.0-25.0 mm.
9. The combined gas-filled sealing device for the pipe stamping deformation process according to claim 6, characterized in that the solid sealing ring (2) has an outer diameter (λ - δ) equal to the outer diameter of the guide section (1.1).
10. The combined inflatable sealing device for the pipe stamping deformation process according to claim 5, wherein the inflatable sealing ring (3) comprises an inflatable sealing bag body (3.1) and an inflatable tube (3.2) arranged on the inner ring of the inflatable sealing bag body (3.1), and the inflatable tube (3.2) is in sealing fit with the inflatable hole (1.5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210196148.1A CN114618933A (en) | 2022-03-01 | 2022-03-01 | Combined type inflation sealing method and device for pipe stamping deformation process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210196148.1A CN114618933A (en) | 2022-03-01 | 2022-03-01 | Combined type inflation sealing method and device for pipe stamping deformation process |
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| Publication Number | Publication Date |
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| CN114618933A true CN114618933A (en) | 2022-06-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210196148.1A Pending CN114618933A (en) | 2022-03-01 | 2022-03-01 | Combined type inflation sealing method and device for pipe stamping deformation process |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1401438A (en) * | 1971-10-30 | 1975-07-16 | Dunlop Ltd | Inflatable seals |
| US4227702A (en) * | 1977-12-23 | 1980-10-14 | Agfa-Gevaert, A.G. | Inflatable sealing device |
| EP0995512A2 (en) * | 1998-10-08 | 2000-04-26 | Alusuisse Technology & Management AG | Method and device for sealing a hollow profile or similar workpiece in high pressure forming |
| CN200951446Y (en) * | 2006-10-11 | 2007-09-26 | 中国科学院金属研究所 | High pressure formation end sealing for pipes |
| CN203023499U (en) * | 2012-12-27 | 2013-06-26 | 中国航空工业空气动力研究院 | High-pressure inflatable rubber sealing ring structure inside oval ring section |
| CN106623579A (en) * | 2016-10-08 | 2017-05-10 | 济南大学 | Internal high-pressure forming pushing and pressing device |
| WO2019110086A1 (en) * | 2017-12-05 | 2019-06-13 | Trelleborg Ridderkerk B.V. | Structure comprising at least two interconnected structural members and a sealing system, offshore wind turbine, and method for building a sealed structure |
-
2022
- 2022-03-01 CN CN202210196148.1A patent/CN114618933A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1401438A (en) * | 1971-10-30 | 1975-07-16 | Dunlop Ltd | Inflatable seals |
| US4227702A (en) * | 1977-12-23 | 1980-10-14 | Agfa-Gevaert, A.G. | Inflatable sealing device |
| EP0995512A2 (en) * | 1998-10-08 | 2000-04-26 | Alusuisse Technology & Management AG | Method and device for sealing a hollow profile or similar workpiece in high pressure forming |
| CN200951446Y (en) * | 2006-10-11 | 2007-09-26 | 中国科学院金属研究所 | High pressure formation end sealing for pipes |
| CN203023499U (en) * | 2012-12-27 | 2013-06-26 | 中国航空工业空气动力研究院 | High-pressure inflatable rubber sealing ring structure inside oval ring section |
| CN106623579A (en) * | 2016-10-08 | 2017-05-10 | 济南大学 | Internal high-pressure forming pushing and pressing device |
| WO2019110086A1 (en) * | 2017-12-05 | 2019-06-13 | Trelleborg Ridderkerk B.V. | Structure comprising at least two interconnected structural members and a sealing system, offshore wind turbine, and method for building a sealed structure |
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