CN113510943A - Forming die and forming method for T-shaped stringer made of composite material - Google Patents
Forming die and forming method for T-shaped stringer made of composite material Download PDFInfo
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- CN113510943A CN113510943A CN202110854032.8A CN202110854032A CN113510943A CN 113510943 A CN113510943 A CN 113510943A CN 202110854032 A CN202110854032 A CN 202110854032A CN 113510943 A CN113510943 A CN 113510943A
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- die
- shaped
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- forming
- stringer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
- B29C70/342—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation using isostatic pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
- B29C70/345—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation using matched moulds
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Moulds, Cores, Or Mandrels (AREA)
Abstract
The invention discloses a composite material T-shaped stringer forming die and a forming method, wherein the composite material T-shaped stringer forming die comprises a fixed die, a movable die and a U-shaped sealing strip, the movable die and the fixed die are combined together through a refined bolt and a butterfly nut, and the sealing strip is arranged in a groove on the web surface of the movable die and plays a role in sealing during bag making. The forming die is additionally provided with the movable die web plate surface groove and the sealing rubber strip, so that the bag making mode of parts during curing is changed, the pressure on the movable die and the fixed die during vacuumizing is equal, and the die body cannot deform under the pressure because the internal pressure and the external pressure of the die body are consistent, so that the appearance of the T-shaped stringer is ensured, and the bag making mode cannot generate larger pressure on the die body, so that the requirement on the rigidity of the forming die is lowered, the tooling material is saved, the weight of the die is lightened, and the die is convenient to carry; the bag making method of the forming method is simple and saves materials.
Description
Technical Field
The invention relates to the technical field of composite part forming, in particular to a forming die and a forming method for a T-shaped stringer made of a composite material.
Background
The composite material has the advantages of light weight, high strength, good designability and the like, so that the application range of the composite material in the field of aviation is gradually expanded, and the application of large-size composite material members is more and more extensive. The T-shaped stringer is used as a reinforcing structure of a large-size composite material component and has extremely wide application.
At present, for the forming of T-shaped stringer parts, a mode of combining a left half mould and a right half mould is generally adopted, after a movable mould and a fixed mould are respectively paved and pasted, the left half mould and the right half mould are closed, and after the closing and the pasting, the mould is integrally placed on a flat plate for bag making. In order to facilitate the movement of the left half die and the right half die in the processes of die assembly and die release and reduce the friction between the left half die and the right half die and the flat plate, a polytetrafluoroethylene sliding block is arranged at the bottom of the movable die, so that a gap of about 0.5mm is reserved between the bottom of the movable die and the flat plate, and the resistance in the processes of die assembly and die release is greatly reduced. The part needs to bear about 6 atmospheric pressures during high-temperature curing, but because the polytetrafluoroethylene sliding block has elasticity, the part is easily compressed under the curing pressure, so that the heights of the left half die and the right half die are reduced, and the shape of the T-shaped stringer part is deformed. Meanwhile, the die body is integrally arranged in the vacuum bag, and the interior of the die body is pumped into a vacuum state, so that the die body also bears huge pressure in the curing process, the requirement on the rigidity of the die body is high, and particularly when the volume of the stringer is large, the forming die needs to be subjected to strength checking during the design. In addition, the overall bag making has certain requirements on the appearance of the die body, and when the die body is larger, the bag making difficulty is higher, and the loss of bag making materials is also higher.
Disclosure of Invention
The invention aims to overcome the defects of the existing forming die structure, and provides a composite material T-shaped stringer forming die structure which can ensure the appearance of a T-shaped stringer part, reduce the requirement on the rigidity of a die and reduce the use of bag making materials.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
the utility model provides a combined material T type stringer forming die, includes cover half, movable mould, U-shaped sealing strip, and cover half, movable mould are L type structure, and the face of its inboard laminating part is the ventral plate face, and the upper surface is the flange face, and cover half and movable mould pass through bolt and nut to be connected, offer a U type recess on the ventral plate face of movable mould, recess equidistance T type stringer edge appearance 10mm, and the U-shaped sealing strip inlay card is in the recess. And prying openings are formed in two ends of the movable die and are used for opening the die after the T-shaped stringer is formed and solidified. When the movable mold and the fixed mold are assembled, the movable mold and the fixed mold are connected through a refined bolt, and one end of the refined bolt is matched with the gasket and the butterfly nut to be screwed down so as to limit the movement of the movable mold caused by the expansion of the sealing rubber strip.
The method for forming the T-shaped stringer by using the forming die comprises the following steps:
1, paving and pasting L layers of the T-shaped stringer on the fixed die and the movable die respectively;
2, clamping the U-shaped sealing strip in the groove, and closing the movable die and the fixed die;
3, tightening the bolt to compress the U-shaped sealing strip;
4, manufacturing a vacuum bag on the edge strip surface, wherein a sealing rubber strip of the vacuum bag is positioned 10mm away from the two side edges of the T-shaped stringer, and the vacuum bag and the U-shaped sealing strip form a T-shaped vacuum area;
and (5) curing and forming the 5T-shaped stringer in a T-shaped vacuum area.
Has the advantages that: the forming die is additionally provided with the movable die web plate surface groove and the sealing rubber strip, so that the bag making mode of parts during curing is changed, the pressure on the movable die and the fixed die during vacuumizing is equal, and the die body cannot deform under the pressure because the internal pressure and the external pressure of the die body are consistent, so that the appearance of the T-shaped stringer is ensured, and the bag making mode cannot generate larger pressure on the die body, so that the requirement on the rigidity of the forming die is lowered, the tooling material is saved, the weight of the die is lightened, and the die is convenient to carry; the bag making method of the forming method is simple and saves materials.
The invention is described in further detail below with reference to the figures and examples.
Drawings
FIG. 1 is a schematic structural view of a T-shaped stringer forming die
FIG. 2 is a schematic view of center filling, edge strip laying and vacuum bag making for T-shaped stringer
The numbering in the figures illustrates: 1. fixing a mold; 2. moving the mold; 3. a U-shaped sealing strip; 4. refining the bolt; 5. a butterfly nut; 6. a T-shaped stringer; 7. sealing rubber strips; 8. vacuum bag
Detailed Description
Referring to fig. 1-2, a combined material T type stringer forming die, includes cover half 1, movable mould 2, U-shaped sealing strip 3, and cover half 1, movable mould 2 are L type structure, and the face of its inboard laminating T type stringer 6 part is the ventral plate face, and the upper surface is the flange face, and cover half 1 and movable mould 2 pass through bolt and nut connection, offer a U type recess on the ventral plate face of movable mould 2, recess equidistance T type stringer edge appearance 10mm, U-shaped sealing strip 3 inlay card is in the recess. And prying openings are formed in two ends of the movable mold 2 and are used for opening the mold after the T-shaped stringer 6 is molded and solidified. When the movable mold 2 and the fixed mold 1 are assembled, the movable mold is connected by a refined bolt 4, and one end of the refined bolt 4 is matched with a gasket and a butterfly nut 5 to be screwed down so as to limit the movement of the movable mold caused by the expansion of the U-shaped sealing strip 3.
The method for forming the T-shaped stringer by using the forming die comprises the following steps:
1, paving and pasting L layers of T-shaped long trusses 6 on a fixed die 1 and a movable die 2 respectively;
2, the U-shaped sealing strip 3 is embedded in the groove in a clamping way, and the movable die 2 is fixed and the die 1 is closed;
3, screwing the bolt to tightly press the U-shaped sealing strip 3;
4 forming a vacuum bag 8 on the edge strip surface, wherein a sealing rubber strip 7 of the vacuum bag 8 is positioned 10mm away from the two side edges of the T-shaped stringer 6, and the vacuum bag 8 and the U-shaped sealing strip 3 form a T-shaped vacuum area
The 5T-shaped stringer 6 is cured and formed in a T-shaped vacuum area.
Claims (4)
1. The utility model provides a combined material T type stringer forming die, its characterized in that includes cover half, movable mould, U-shaped sealing strip, and cover half, movable mould are L type structure, and the face of its inboard laminating part is the ventral plate face, and the upper surface is the flange face, and cover half and movable mould pass through bolt and nut to be connected, offer a U type recess on the ventral plate face of movable mould, recess equidistance T type stringer edge appearance 10mm, and the U-shaped sealing strip inlay card is in the recess.
2. The mold structure of claim 1, wherein prying openings are formed at two ends of the movable mold and are used for mold opening after the T-shaped stringer is molded and cured.
3. The mold structure of claim 1, wherein the movable mold and the fixed mold are connected by a refined bolt during the mold assembly, and one end of the refined bolt is screwed by matching with a gasket and a wing nut to limit the movement of the movable mold caused by the expansion of the sealing rubber strip.
4. A forming method of a T-shaped stringer made of composite materials is characterized by comprising the following steps:
4-1, paving and pasting L layers of the T-shaped stringers on the fixed die and the movable die respectively;
4-2, clamping the U-shaped sealing strip in the groove, and closing the movable die and the fixed die;
4-3, tightening the bolt to compress the U-shaped sealing strip;
4-4 forming vacuum bag on the edge strip surface, the sealing rubber strip of the vacuum bag is positioned 10mm away from the two side edges of the T-shaped stringer, and the vacuum bag and the U-shaped sealing strip form a T-shaped vacuum area
4-5T-shaped stringers are cured and formed in a T-shaped vacuum area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110854032.8A CN113510943A (en) | 2021-07-27 | 2021-07-27 | Forming die and forming method for T-shaped stringer made of composite material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110854032.8A CN113510943A (en) | 2021-07-27 | 2021-07-27 | Forming die and forming method for T-shaped stringer made of composite material |
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| CN113510943A true CN113510943A (en) | 2021-10-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110854032.8A Pending CN113510943A (en) | 2021-07-27 | 2021-07-27 | Forming die and forming method for T-shaped stringer made of composite material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116061464A (en) * | 2022-12-26 | 2023-05-05 | 江西洪都航空工业集团有限责任公司 | Multi-stringer forming device and forming method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111590928A (en) * | 2020-05-22 | 2020-08-28 | 西安飞机工业（集团）有限责任公司 | Forming device and forming method for T-shaped stringer of composite material non-bottom-edge layering |
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2021
- 2021-07-27 CN CN202110854032.8A patent/CN113510943A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111590928A (en) * | 2020-05-22 | 2020-08-28 | 西安飞机工业（集团）有限责任公司 | Forming device and forming method for T-shaped stringer of composite material non-bottom-edge layering |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116061464A (en) * | 2022-12-26 | 2023-05-05 | 江西洪都航空工业集团有限责任公司 | Multi-stringer forming device and forming method |
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Application publication date: 20211019 |