CN216941801U - Wall thickness variable tubular beam forming device based on invariable external diameter - Google Patents
Wall thickness variable tubular beam forming device based on invariable external diameter Download PDFInfo
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- CN216941801U CN216941801U CN202220363294.4U CN202220363294U CN216941801U CN 216941801 U CN216941801 U CN 216941801U CN 202220363294 U CN202220363294 U CN 202220363294U CN 216941801 U CN216941801 U CN 216941801U
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- vacuum bag
- die body
- bag film
- tubular
- tubular vacuum
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Abstract
The utility model relates to a wall thickness variable type pipe beam forming device based on unchanged outer diameter, which is provided with an upper die body, a lower die body, a foam core die and a tubular vacuum bag film, wherein the end surfaces of the upper die body and the lower die body are fixedly connected with an outer cover plate, the outer sides of the upper die body and the lower die body are sleeved with an outer vacuum bag, a nylon plate is arranged in the front end part of the tubular vacuum bag film, the front end of the tubular vacuum bag film is bonded and fixed with the front end surface of the nylon plate after being flanged outwards along the periphery of the nylon plate, and a pressure pipe for introducing pressure gas into the tubular vacuum bag film is arranged in the center of the nylon plate. According to the utility model, the nylon plate is arranged in the tubular vacuum bag film, and when the nylon plate is pressurized and inflated, the pressure in the tubular vacuum bag film can be completely applied to the nylon plate, so that the sealing rubber strip is pressed more and more tightly with the outer cover plate under the action of the pressure, and the sealing performance of the tubular vacuum bag film sealing body is improved; meanwhile, the tubular vacuum bag film is bonded before the outer cover plate is fixed, so that the operation of bonding between the tubular vacuum bag film and the outer cover plate is facilitated.
Description
Technical Field
The utility model relates to a wall thickness variable tubular beam forming device based on constant outer diameter.
Background
The existing tubular beam part with constant outer diameter and variable wall thickness is usually manufactured by adopting an internal expansion method, and the inflation sealing form of the used internal expansion forming device is as follows: and sealing rubber strips are filled in the sealing grooves of the upper die and the lower die, the tubular vacuum bag film is turned over to the upper die and the lower die, the sealing rubber strips are continuously packaged on the tubular vacuum bag film after being stuck, the upper end cover is covered, then the upper bolt is fastened, and the tubular vacuum bag film is inflated through a pressurizing hole in the center of the end cover. During this process, an outer vacuum bag for evacuation is bonded to the end cap.
During inflation, the tubular vacuum bag film, the two end covers and the two sealing rubber strips form a sealing body, although the end covers, the upper die and the lower die are fastened by bolts, the sealing form has two risks when compressed air of more than 7bar is inflated: when at first aerifing, pressure can be applyed end cover and joint strip department completely (see the back pressure direction arrow of aerifing), because joint strip is soft material, joint strip can absorb the air and produce the bubble during aerifing, though end cover and upper and lower mould joint gap are less, but still can cause the seal gas leakage, secondly, bond joint strip between tubulose vacuum bag membrane and the end cover after, when covering the bolt-up on the end cover, can only be the blind cover end cover, if there is the unable processing operation that corresponds of clearance between end cover and the tubulose vacuum bag membrane, cause the seal to have the risk of gas leakage, therefore the quality of tubular beam finished piece can't be guaranteed.
In addition, when the outer vacuum bag is vacuumized to exhaust air between the workpiece and the tooling surface, if the tubular vacuum bag membrane sealing body after pressurization and inflation leaks air from the end cover under the condition that the sealing performance of the outer vacuum bag is good, the air can directly enter the vacuumized outer vacuum bag, so that the failure of the outer vacuum bag and the tubular vacuum bag membrane is caused, and the manufacturing requirement of the workpiece cannot be met.
Disclosure of Invention
The technical problem to be solved by the utility model is as follows: in order to overcome the defects in the prior art, the utility model provides a wall thickness variable tubular beam forming device based on constant outer diameter, so as to improve the sealing performance of a tubular vacuum bag film sealing body.
The technical scheme adopted by the utility model for solving the technical problem is as follows: a wall thickness variable pipe beam forming device based on unchanged outer diameter is provided with an upper die body and a lower die body, wherein a foam core die is arranged in an inner cavity defined by the upper die body and the lower die body, the end faces of the upper die body and the lower die body are fixedly connected with an outer cover plate, a tubular vacuum bag film is arranged between the foam core die and the inner wall of the inner cavity, an outer vacuum bag is sleeved on the outer sides of the upper die body and the lower die body, a nylon plate is arranged in the front end part of the tubular vacuum bag film, the front end of the tubular vacuum bag film is fixedly bonded with the front end face of the nylon plate after being flanged outwards along the periphery of the nylon plate, and a pressurizing pipe for introducing pressure gas into the tubular vacuum bag film is arranged in the center of the nylon plate.
Furthermore, in order to improve the installation firmness of the tubular vacuum bag film, the center of the outer cover plate is provided with a central through hole, and the front end of the tubular vacuum bag film extends out of the central through hole after being flanged outwards along the periphery of the nylon plate and is fixedly bonded with the outer cover plate.
The utility model has the beneficial effects that: according to the utility model, the nylon plate is arranged in the tubular vacuum bag film, so that the stress mode of the sealing body formed by the tubular vacuum bag film and the nylon plate is changed, the pressure in the tubular vacuum bag film can be completely applied to the nylon plate during pressurization and inflation, and the sealing rubber strip is pressed more tightly with the outer cover plate under the action of the pressure, so that the sealing performance of the sealing body of the tubular vacuum bag film is improved; meanwhile, the tubular vacuum bag film is bonded before the outer cover plate is not fixed, so that the bonding between the tubular vacuum bag film and the outer cover plate is conveniently checked and operated.
Drawings
The utility model is further described with reference to the following figures and embodiments.
FIG. 1 is a schematic diagram of the present invention.
In the figure: 1. the vacuum bag comprises an upper die body, a lower die body, a foam core die, a cover plate, a tubular vacuum bag film, an outer vacuum bag, a central through hole, a nylon plate, a sealing rubber strip, a pressurizing pipe and a pipe beam part, wherein the upper die body is 2, the lower die body is 3, the foam core die is 4, the outer cover plate is 5, the tubular vacuum bag film is 6, the outer vacuum bag is 7, the central through hole is 8, the nylon plate is 9, the sealing rubber strip is 10, and the pressurizing pipe is 11.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
As shown in fig. 1, the variable wall thickness tubular beam forming device based on the unchanged outer diameter comprises an upper die body 1 and a lower die body 2, wherein a foam core die 3 is arranged in an inner cavity enclosed by the upper die body 1 and the lower die body 2, a tubular vacuum bag film 5 is arranged between the foam core die 3 and the inner wall of the inner cavity, a formed tubular beam workpiece is arranged between the outer wall surface of the tubular vacuum bag film 5 and the inner wall of the inner cavity, and an outer vacuum bag 6 is sleeved on the outer side of the upper die body 1 and the outer side of the lower die body 2.
The end surfaces of the upper die body 1 and the lower die body 2 are fixedly connected with an outer cover plate 4 through bolts, a central through hole 7 is formed in the center of the outer cover plate 4, a nylon plate 8 is arranged in the front end portion of the tubular vacuum bag film 5, the end portion of the tubular vacuum bag film 5 is sleeved on the nylon plate 8 and then outwards flanged along the periphery of the nylon plate 8 and is fixedly bonded with the front end surface of the nylon plate 8 through a sealing rubber strip 9, then the front end of the tubular vacuum bag film 5 extends out of the central through hole 7 and is fixedly bonded with the outer cover plate 4 through the sealing rubber strip 9, and therefore the mounting firmness of the tubular vacuum bag film 5 is improved.
The center of the nylon plate 8 is provided with a pressure pipe 10 for introducing pressure gas into the tubular vacuum bag film 5, and the pressure pipe 10 extends out of the outer cover plate 4 through the central through hole 7.
During forming, compressed air with the pressure of more than 7bar is filled into the tubular vacuum bag film 5 through the pressurizing pipe 10, so that a formed tubular beam workpiece 11 is tightly attached to a tooling surface formed by the inner wall surface of an inner cavity enclosed by the upper die body 1 and the lower die body 2, and the shape is maintained until the resin is cured; when the air between the tubular beam part 11 and the tooling surface needs to be exhausted, the air between the tubular beam part 11 and the tooling surface can be pumped out through the outer vacuum bag 6 in a vacuum manner. If a small amount of compressed air overflows from the tubular vacuum bag film 5, the compressed air cannot enter the vacuumized outer vacuum bag 6, and even if the compressed air leaks slightly, the air is kept inflated all the time in the tank-entering heating process to meet the quality requirement of the tubular beam part 11.
According to the utility model, the nylon plate 8 is arranged in the tubular vacuum bag film 5, so that the stress mode of the inner sealing body formed by the tubular vacuum bag film 5 and the nylon plate 8 is changed, when the nylon plate 8 is pressurized and inflated, the pressure in the tubular vacuum bag film 5 can be completely applied to the nylon plate 8, and the sealing rubber strip 9 is pressed more and more tightly with the outer cover plate 4 under the action of the pressure; meanwhile, the operation is open before the outer cover plate 4 is not fixed, thereby facilitating the inspection and operation of the adhesiveness of the sealing rubber strip 9 adhered between the tubular vacuum bag film 5 and the outer cover plate 4.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations can be made by the worker in the light of the above teachings without departing from the spirit of the utility model. The technical scope of the present invention is not limited to the content of the description, and must be determined according to the scope of the claims.
Claims (2)
1. The utility model provides a wall thickness variable tubular beam forming device based on external diameter is unchangeable, has die body, lower die body, is located the intracavity that die body, lower die body enclose and is equipped with the foam mandrel, and the terminal surface rigid coupling of going up the die body and die body down has outer apron, the foam mandrel with be equipped with tubulose vacuum bag membrane between the intracavity wall, go up the die body and die body outside cover and be equipped with outer vacuum bag, characterized by: the front end of the tubular vacuum bag film is provided with a nylon plate, the front end of the tubular vacuum bag film is flanged outwards along the periphery of the nylon plate and then is fixedly bonded with the front end surface of the nylon plate, and the center of the nylon plate is provided with a pressure pipe for introducing pressure gas into the tubular vacuum bag film.
2. The forming apparatus of a variable wall thickness tubular beam based on a constant outer diameter as set forth in claim 1, wherein: the center of the outer cover plate is provided with a central through hole, and the front end of the tubular vacuum bag film extends out of the central through hole after being flanged outwards along the periphery of the nylon plate and is fixedly bonded with the outer cover plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220363294.4U CN216941801U (en) | 2022-02-22 | 2022-02-22 | Wall thickness variable tubular beam forming device based on invariable external diameter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220363294.4U CN216941801U (en) | 2022-02-22 | 2022-02-22 | Wall thickness variable tubular beam forming device based on invariable external diameter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216941801U true CN216941801U (en) | 2022-07-12 |
Family
ID=82291050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220363294.4U Active CN216941801U (en) | 2022-02-22 | 2022-02-22 | Wall thickness variable tubular beam forming device based on invariable external diameter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216941801U (en) |
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2022
- 2022-02-22 CN CN202220363294.4U patent/CN216941801U/en active Active
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