CN113183485B - Forming tool and method for composite material internal reinforced structure box type rib - Google Patents
Forming tool and method for composite material internal reinforced structure box type rib Download PDFInfo
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- CN113183485B CN113183485B CN202110393594.7A CN202110393594A CN113183485B CN 113183485 B CN113183485 B CN 113183485B CN 202110393594 A CN202110393594 A CN 202110393594A CN 113183485 B CN113183485 B CN 113183485B
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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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/42—Moulds or cores; Details thereof or accessories therefor characterised by the shape of the moulding surface, e.g. ribs or grooves
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- Engineering & Computer Science (AREA)
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- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
The forming tool for the box type rib with the reinforced structure in the composite material comprises a base body die, a front split die and a rear split die; the base body mould comprises a front base, a rear base and a middle boss, the lower molded surface of the front split mould is consistent with and connected with the upper molded surface of the front base, and the lower molded surface of the rear split mould is consistent with and connected with the upper molded surface of the rear base; the lower molded surface of the box-shaped rib with the reinforced structure is consistent with the integral upper molded surface of the die consisting of the front split die, the rear split die and the middle boss. Uniformly coating a release agent on the forming tool; laying and overlapping prepreg on the front split mold, the rear split mold and the middle boss; respectively installing a front split die and a rear split die on a front base and a rear base to form an integral tool; and vacuumizing the tool, paving the prepreg on the tool, vacuumizing again, packaging and sending into an autoclave for molding. By adopting the forming tool, the internal quality and the profile precision of the part are ensured, and meanwhile, the forming tool is simple to operate and high in efficiency.
Description
Technical Field
The invention relates to the technical field of composite material manufacturing, in particular to a forming tool and a forming method for a box type rib with a reinforced structure in a composite material.
Background
The composite material has become one of the most important aviation structural materials in the present day due to the characteristics of high specific strength, high specific hardness, strong designability, good fatigue fracture resistance, corrosion resistance, good dimensional stability and convenience for large-area integral molding. In order to improve the utilization rate of the composite material and fully exert the designability and integral forming advantages of the composite material, more and more composite material parts select a ribbed structure to ensure the rigidity of the parts and reduce the mass of the parts. The box-type rib with the internal reinforcement structure made of the composite material is an integrally formed part with high structural efficiency, but the position precision and the internal quality of the rib inside the part are difficult to ensure by forming the rib. In consideration of the problems of pressurization and demoulding of the inner ribs of the reinforced structure box type ribs, in the existing composite material inner reinforced structure box type rib forming technology, a rubber mold and the like are often adopted for selective thermal expansion forming. How to solve the autoclave molding of the box type rib with a reinforced structure in the composite material is a difficult problem, and provides a technical method and a mold which are simple to operate and high in efficiency while ensuring the internal quality and the profile precision of parts.
Disclosure of Invention
In order to complete autoclave molding of the composite material internal reinforced structure box type rib, provide a technical method and a mold which are simple to operate and high in efficiency while ensuring the internal quality and the profile precision of parts, and the embodiment of the invention provides a molding tool and a molding method for the composite material internal reinforced structure box type rib. The specific technical scheme is as follows:
the forming tool for the box type rib with the reinforced structure in the composite material comprises a base body die, a front split die and a rear split die; the base body mould comprises a front base, a rear base and a middle boss, wherein the lower molding surface of a front split mould of the front split mould is consistent with and connected with the upper molding surface of the front base, and the lower molding surface of a rear split mould of the rear split mould is consistent with and connected with the upper molding surface of the rear base; the lower molded surface of the reinforced structure box-type rib is consistent with the integral upper molded surface of a mold formed by the front split mold, the rear split mold and the middle boss.
Further, the front base 7 comprises a front boss guide rail, and the lower profile of the front split die comprises a front split die groove; the rear base includes a rear boss guide rail; the lower molding surface of the rear split die comprises a rear split die groove; the front base is connected with the front split die groove of the front split die through a front boss guide rail; the rear base is connected with the rear split die groove of the rear split die through a rear boss guide rail.
Further, the front split dies comprise front split die pry lever openings used for being detached from the base body die, and the rear split dies comprise rear split die pry lever openings used for being detached from the base body die.
Furthermore, the base body die, the front split die and the rear split die are all manufactured by Q235 steel numerical control machining.
Further, the reinforced structure box type rib comprises a front rib and a rear rib; the front boss guide rail and the rear boss guide rail are perpendicular to the plane where the front rib and the rear rib are located, the length of the front boss guide rail and the rear boss guide rail is L1, the width of the front boss guide rail and the rear boss guide rail is H1, and the height of the front boss guide rail and the rear boss guide rail is T1; the length of the front split mold groove and the rear split mold groove is L1+10mm, the width of the front split mold groove and the rear split mold groove are H1, and the height of the front split mold groove and the rear split mold groove is T1+1mm.
Furthermore, the front split dies and the rear split dies can slide along a plane perpendicular to the front ribs and the rear ribs.
A second aspect of the present invention provides a molding method for a composite material internally reinforced structural cassette rib, comprising the steps of:
uniformly coating a release agent on the forming tool;
respectively paving and overlapping prepreg on the front split die, the rear split die and the middle lug boss;
respectively installing a front split die and a rear split die on a front base and a rear base to form an integral tool;
and vacuumizing the whole tool, filling the prepreg unidirectional tape in the R-angle area, paving the prepreg on the whole tool to form a prepreg blank of the reinforced structure box-type rib in the composite material, vacuumizing again, packaging and sending the prepreg blank into an autoclave for molding.
Furthermore, in the process of demoulding the reinforced structure box-type rib, the front split dies and the rear split dies which are not taken off from the part are firstly separated from the base die together with the part by means of the front split die crow bar ports and the rear split die crow bar ports;
and taking the front split dies out of the part, and finally taking the rear split dies out of the part.
The embodiment of the invention provides a forming tool and a forming method for a box-type rib with a reinforced structure in a composite material, wherein the forming tool comprises a base body die, a front split die and a rear split die; the base body mould comprises a front base, a rear base and a middle boss, wherein the lower profile of the front split mould is consistent with and connected with the upper profile of the front base, and the lower profile of the rear split mould is consistent with and connected with the upper profile of the rear base; the lower molded surface of the reinforced structure box type rib is consistent with the upper molded surface of the whole die composed of the front split die, the rear split die and the middle boss. Uniformly coating a release agent on the forming tool; respectively paving and stacking prepreg on the front split mold, the rear split mold and the middle boss; respectively installing a front split die and a rear split die on a front base and a rear base to form an integral tool; and after filling the prepreg unidirectional tape in the R-angle area, vacuumizing the whole tool, paving the prepreg on the whole tool to form a prepreg blank of the reinforced structure box-type rib in the composite material, vacuumizing again, packaging and sending into an autoclave for molding. By adopting the forming tool, the autoclave forming of the box type rib with the reinforced structure in the composite material can ensure the internal quality and the profile precision of parts, and provide a technical method and a die which are simple to operate and high in efficiency.
Drawings
FIG. 1 is a schematic view of a forming tool for a composite material internal reinforced structure box type rib;
FIG. 2 is a schematic view of a composite internally ribbed box rib;
FIG. 3 is a schematic diagram of a mold for forming a tooling base for forming a box-type rib with a reinforced structure inside a composite material;
FIG. 4 is a schematic diagram of a split die before a forming tool for a composite material internal reinforced structure box type rib;
FIG. 5 is a schematic diagram of a split die after a forming tool for a composite material internal reinforced structure box type rib;
in the figure:
1. a base mold; 2. front split mold; 3. dividing the model; 4. a reinforced structural box type rib; 5. a front rib; 6. a rear rib; 7. a front base; 8. a rear base; 9. a front boss guide rail; 10. a rear boss guide rail; 11. a middle boss; 12. a front split mold groove; 13. a front split mold crow bar port; 14. a front split mold lower molded surface; 15. a back split mold groove; 16. prying a lever port by a rear split die; 17. and the lower molding surface of the rear split mold.
Detailed Description
The present invention will be described with reference to the accompanying drawings, but the present invention is not limited thereto.
Referring to fig. 1-5, fig. 1 is a schematic view of a forming tool for a composite material internal reinforced structure box type rib; FIG. 2 is a schematic view of a composite internally stiffened structural box rib; FIG. 3 is a schematic diagram of a mold for forming a tooling base for forming a box-type rib with a reinforced structure inside a composite material; FIG. 4 is a schematic diagram of a split die before a forming tool for a composite material internal reinforced structure box type rib;
FIG. 5 is a schematic diagram of a split die after a forming tool for a composite material internal reinforced structure box type rib.
The forming tool for the box-type rib with the reinforced structure in the composite material comprises a base body die 1, a front split die 2 and a rear split die 3; the base body mold 1 comprises a front base 7, a rear base 8 and a middle boss 11, a front split mold lower molded surface 14 of the front split mold 2 is consistent with and connected with an upper molded surface of the front base 7, and a rear split mold lower molded surface 17 of the rear split mold 3 is consistent with and connected with an upper molded surface of the rear base 8.
The lower profile of the box-type rib 4 with the reinforced structure is consistent with the upper profile of the whole die consisting of the front split die 2, the rear split die 3 and the middle boss 11.
The reinforced structure box type rib 4 comprises a front rib 5 and a rear rib 6; the front boss guide rail 9 and the rear boss guide rail 10 are respectively perpendicular to the planes of the front rib 5 and the rear rib 6. The front split dies 2 and the rear split dies 3 can slide along a plane perpendicular to the planes of the front ribs 5 and the rear ribs 6.
In the embodiment of the present invention, the rear boss guide rail 10 has a length L1, a width H1, and a height T1; the front split die groove 12 and the rear split die groove 15 are L1+10mm in length, H1 in width and T1+1mm in height.
The T1, L1, and H1 may be set according to actual needs, and are not limited herein.
Further, in order to facilitate the connection between the front split dies 2 and the rear split dies 3 and the base mold 1, it is preferable that the front base 7 includes a front boss guide rail 9, and the front split die lower molding surfaces 14 of the front split dies 2 include front split die grooves 12; the rear base 8 includes a rear boss rail 10; the lower molding surface 17 of the rear split die 3 comprises a rear split die groove 15; the front base 7 is connected with the groove 12 of the front split die 2 through a front boss guide rail 9; the rear base 8 is connected with a rear split die groove 15 of the rear split die 3 through a rear boss guide rail 10.
Further, the front split die 2 includes a front split die pry notch 13 for detachment from the base die 1, and the rear split die 3 includes a rear split die pry notch 16 for detachment from the base die 1.
Further, the base body die 1, the front split die 2 and the rear split die 3 are all manufactured by Q235 steel numerical control machining.
Further, the front split dies 2 and the rear split dies 3 can slide along a plane perpendicular to the plane of the front ribs 5 and the rear ribs 6.
The forming tool for the box type rib with the reinforced structure in the composite material comprises a base body die, a front split die and a rear split die; the base body mould comprises a front base, a rear base and a middle boss, wherein the lower profile of the front split mould is consistent with and connected with the upper profile of the front base, and the lower profile of the rear split mould is consistent with and connected with the upper profile of the rear base; the lower molded surface of the reinforced structure box-type rib is consistent with the integral upper molded surface of the die formed by the front split die, the rear split die and the middle boss. Uniformly coating a release agent on the forming tool; respectively paving and overlapping prepreg on the front split die, the rear split die and the middle lug boss; respectively installing a front split die and a rear split die on a front base and a rear base to form an integral tool; and vacuumizing the whole tool, filling a prepreg unidirectional tape in the R-angle area, then paving the prepreg on the whole tool to form a prepreg blank of the box-type rib with the reinforced structure in the composite material, vacuumizing again, packaging and sending into an autoclave for molding. By adopting the forming tool, the autoclave forming of the box type rib with the reinforced structure in the composite material can ensure the internal quality and the profile precision of parts, and provide a technical method and a die which are simple to operate and high in efficiency.
A second aspect of the present invention provides a method for forming a box rib of an internally reinforced structure of a composite material, comprising the steps of:
uniformly coating a release agent on the forming tool;
respectively paving and stacking prepreg on the front split mold 2, the rear split mold 3 and the middle boss 11;
respectively installing the front split die 2 and the rear split die 3 on a front base 7 and a rear base 8 to form an integral tool;
and (3) after filling the prepreg unidirectional tape in the R-angle area, vacuumizing the whole tool, paving the prepreg on the whole tool to form a prepreg blank of the reinforced structure box-type rib 4 in the composite material, vacuumizing again, packaging and sending the prepreg blank into an autoclave for molding.
Further, in the demoulding process of the reinforced structure box type rib 4, the front split die 2 and the rear split die 3 which are not taken off from the part are separated from the base die 1 together with the part by means of the front split die prying lever port 13 and the rear split die prying lever port 16;
and taking the front split dies out of the part, and finally taking the rear split dies out of the part.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (7)
1. A non-negative mould forming tool for an autoclave of a reinforced structure box type rib in a composite material is characterized by comprising a base mould (1), a front split mould (2) and a rear split mould (3); the base body mold (1) comprises a front base (7), a rear base (8) and a middle boss (11), a front split mold lower molding surface (14) of the front split mold (2) is consistent with and connected with an upper molding surface of the front base (7), and a rear split mold lower molding surface (17) of the rear split mold (3) is consistent with and connected with an upper molding surface of the rear base (8); the lower molded surface of the reinforced structure box-type rib (4) is consistent with the upper molded surface of the whole die jointly formed by the front split die (2), the rear split die (3) and the middle boss (11), the front base (7) comprises a front boss guide rail (9), and the lower molded surface (14) of the front split die (2) comprises a front split die groove (12); the rear base (8) comprises a rear boss guide rail (10); the lower molding surface (17) of the rear split die (3) comprises a rear split die groove (15); the front base (7) is connected with the front split die groove (12) of the front split die (2) through a front boss guide rail (9); rear portion base (8) through rear portion boss guide rail (10) with back split mould recess (15) of back split mould (3) are connected, add rib structure box-shaped rib (4) including preceding rib (5) and back rib (6), rib (5) place plane before anterior boss guide rail (9) the perpendicular to, rib (6) place plane behind rear portion boss guide rail (10) the perpendicular to.
2. The autoclave non-female-die molding tool for composite material internal reinforcement structure box type ribs according to claim 1, characterized in that the front split die (2) comprises a front split die pry port (13) for detachment from the base mold (1), and the rear split die (3) comprises a rear split die pry port (16) for detachment from the base mold (1).
3. The autoclave non-negative-mold forming tool for the composite material internal reinforcement structure box-type ribs as claimed in claim 1, wherein the base mold (1), the front split mold (2) and the rear split mold (3) are all manufactured by Q235 steel numerical control machining.
4. The autoclave die-free molding tool for the composite material internal reinforcement structure box type rib as claimed in claim 1, wherein the rear boss guide rail (10) has a length of L1, a width of H1, and a height of T1; the length of the front split die groove (12) and the rear split die groove (15) is L1+10mm, the width is H1, and the height is T1+1mm.
5. The autoclave non-negative die forming tool for the composite material internal reinforcement structure box type ribs as claimed in claim 1, wherein the front split dies (2) and the rear split dies (3) can slide along a plane perpendicular to the front ribs (5) and the rear ribs (6).
6. A non-negative mould molding method of an autoclave for a composite material internal reinforced structure box type rib is characterized by comprising the following steps:
uniformly coating a release agent on the forming tool of any one of claims 1 to 5;
respectively paving and stacking prepreg on the front split mold (2), the rear split mold (3) and the middle boss (11);
respectively installing a front split die (2) and a rear split die (3) on a front base (7) and a rear base (8) to form an integral tool;
and vacuumizing the whole tool, filling the prepreg unidirectional tape in the R-angle area, paving the prepreg on the whole tool to form a prepreg blank of the reinforced structure box-type rib (4) in the composite material, vacuumizing again, packaging and sending into an autoclave for molding.
7. The autoclave non-negative mould forming method for the composite material internal reinforcement structure box type rib, according to the claim 6, characterized in that, in the process of demoulding the reinforcement structure box type rib (4), the front split mould (2) and the rear split mould (3) which are not taken off from the part are firstly taken off from the base mould (1) together with the part by means of the front split mould prying lever port (13) and the rear split mould prying lever port (16);
and taking the front split dies out of the parts, and finally taking the rear split dies out of the parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110393594.7A CN113183485B (en) | 2021-04-13 | 2021-04-13 | Forming tool and method for composite material internal reinforced structure box type rib |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110393594.7A CN113183485B (en) | 2021-04-13 | 2021-04-13 | Forming tool and method for composite material internal reinforced structure box type rib |
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| Publication Number | Publication Date |
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| CN113183485A CN113183485A (en) | 2021-07-30 |
| CN113183485B true CN113183485B (en) | 2022-11-11 |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITTO20110332A1 (en) * | 2011-04-12 | 2012-10-13 | Alenia Aeronautica Spa | PROCEDURE FOR MANUFACTURING OF COMPOSITE MATERIALS WITH SANDWICH STRUCTURE CLOSED |
| CN203438435U (en) * | 2013-08-15 | 2014-02-19 | 北京卫星制造厂 | Forming die provided with boxy reinforced structure and made of carbon fiber composite |
| FR3017321B1 (en) * | 2014-02-13 | 2016-08-26 | Snecma | INJECTION MOLD CORE FOR MAKING A COMPOSITE MATERIAL PART HAVING A CLOSED HOUSING |
| EP2910365B1 (en) * | 2014-02-21 | 2017-04-26 | Airbus Operations GmbH | Composite structural element and torsion box |
| CN108000894A (en) * | 2017-11-08 | 2018-05-08 | 江西洪都航空工业集团有限责任公司 | A kind of continuous load-carrying construction of global formation composite material orthogonal muscle |
| CN112172199A (en) * | 2020-09-25 | 2021-01-05 | 天津工业大学 | Design method of integrated datum plane positioning structure of RTM (resin transfer molding) mold of ultrathin special-shaped curved surface shell |
| CN112537435B (en) * | 2020-11-20 | 2023-03-17 | 上海复合材料科技有限公司 | Composite material wing beam with high-precision curved surface and large length-diameter ratio and preparation method thereof |
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