CN118927666A - A multifunctional mold for manufacturing composite co-cured hat-shaped long stringer wall panels - Google Patents
A multifunctional mold for manufacturing composite co-cured hat-shaped long stringer wall panels Download PDFInfo
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- CN118927666A CN118927666A CN202411077455.3A CN202411077455A CN118927666A CN 118927666 A CN118927666 A CN 118927666A CN 202411077455 A CN202411077455 A CN 202411077455A CN 118927666 A CN118927666 A CN 118927666A
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- Prior art keywords
- machining
- mold
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- stringer
- composite
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Classifications
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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
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
-
- 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
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
- B29C70/545—Perforating, cutting or machining during or after moulding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
- B29L2031/3076—Aircrafts
- B29L2031/3082—Fuselages
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
本发明公开了一种用于复合材料共固化帽型长桁壁板制造的多功能模具，包括整体模具，还包括：壁板净边界刀槽：整体模具上预留的净边界刀槽，壁板净边界刀槽中需要填充牺牲材料，用以对共固化壁板的净边界进行机加；壁板内窗开口刀槽：壁板中窗开口处的刀槽，同样需要填充牺牲材料，用以对复材零件内部的窗开口进行机加。本发明在模机加的加工方法不需要额外购入一台通用柔性夹持装置，可以节约较大的经济成本，并且多功能模具能在机加时为壁板提供整体的夹持，将机加时零件变形带来的影响降至最低，极大提升了加工的精度。
The present invention discloses a multifunctional mold for manufacturing composite co-cured hat-shaped long truss wall panels, including an integral mold, and also including: wall panel net boundary knife grooves: net boundary knife grooves reserved on the integral mold, the wall panel net boundary knife grooves need to be filled with sacrificial materials, and are used to machine the net boundaries of the co-cured wall panels; wall panel inner window opening knife grooves: the knife grooves at the window openings in the wall panels also need to be filled with sacrificial materials, and are used to machine the window openings inside the composite parts. The in-mold machining method of the present invention does not require the purchase of an additional universal flexible clamping device, which can save a large economic cost, and the multifunctional mold can provide overall clamping for the wall panels during machining, minimize the impact of part deformation during machining, and greatly improve the machining accuracy.
Description
Technical Field
The invention relates to the technical field of dies, in particular to a multifunctional die for manufacturing a cap-shaped stringer wallboard by co-curing a composite material.
Background
Because weight reduction can bring higher economic benefits to large airplanes, the development of large airplanes is beginning to pursue the increase of the dosage of the composite materials as much as possible. The composite aircraft fuselage is generally assembled from a plurality of fuselage panels, and the composite fuselage panels are mainly cap-type stringers and skin-combined structures.
In order to further reduce weight and improve the mechanical properties of the structure, a co-cure molding process in which the hat stringers and the aircraft skin in the prepreg state are cured simultaneously is the preferred method of manufacturing hat stringer panels.
After the co-cure is completed, the composite wallboard is typically released from the mold prior to machining the remainder of the wallboard. This post-release machining typically requires the cooperation of flexible clamps. Because the flexible clamp only clamps the whole molded surface through discrete supporting points, deformation of the wall plate is unavoidable after part edge milling/wall plate drilling, and finally, the tolerance of the molded surface is increased.
Disclosure of Invention
The invention aims to provide a multifunctional die for manufacturing composite material co-cured cap-shaped stringer wallboard, so as to solve the problems in the background art.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
A multi-functional mold for the manufacture of composite co-cured hat stringer webs, comprising an integral mold, further comprising:
clean boundary knife slot of wall plate: the method comprises the steps that a clean boundary knife groove is reserved on the integral die, sacrificial materials are required to be filled in the clean boundary knife groove of the wallboard, and the clean boundary knife groove is used for machining the clean boundary of the co-cured wallboard;
Window opening knife slot in wallboard: the knife slot at the window opening in the wallboard is also required to be filled with sacrificial materials for machining the window opening in the composite part;
Machining a hole groove: the machining hole slot is used for machining the machining hole in the composite part, the diameter of the machining hole slot is determined by the diameter of the hole and the required tolerance, and the depth is the diameter of the hole plus the length of the drill bit tip;
Stringer groove: the position of the stringer groove on the integral mould is the position of the stringer of the wallboard, and is used for placing the preformed stringer for subsequent co-curing with the skin;
Vacuum air guide groove: the vacuum air guide groove of the outer ring of the integral die is connected with a vacuum pipeline below the integral die and is used for providing uniform air guide for the whole wallboard during vacuum packaging;
end clamp plate: machining the net boundaries at the two ends of the stringer;
Extension angle piece: the device is used for connecting the integral die with a numerical control machine tool;
tool retracting groove: the tool retracting grooves on the wall plate clean boundary tool grooves extend towards the outer side of the part at regular intervals, the tool retracting groove is used for discharging scraps generated in the machining process, so that the scraps are prevented from blocking the tool to advance;
Sinking a die: the end pressing plate is used for placing the end pressing plate, and because the core mold penetrating through the two ends of the integral die is not moved out during machining, the core mold is cut by direct machining, and a wall plate clean boundary knife slot cannot be formed on the core mold, the end pressing plate with the wall plate clean boundary knife slot is required to be sunk at the two ends of the integral die and placed, and the end pressing plate is placed when the tool is ready;
vacuum bag: is used for vacuum packaging.
Further, the end pressing plate is a strip-shaped thin plate, and the end pressing plate is made of invar steel or a composite material identical to the wallboard material.
Further, a core mold is mounted on the integral mold.
Compared with the prior art, the invention has the beneficial effects that:
1. the machining method of the die machine does not need to additionally purchase a universal flexible clamping device, and can save larger economic cost.
2. The machining method of the die machine omits the step of installing the demolded part on the universal flexible clamping device, and saves working hours.
3. Because the shaping frock can provide the support of whole face for combined material wallboard when the die machine adds for the profile of the part that the digital control machine added can hardly take place to warp, has promoted the quality of processing.
4. The rebound stress of the edge part of the part can be released after machining the edge of the part, and the machining sequence of the numerical control machine after machining and demolding is advanced, so that the composite part is easier and more convenient to demold.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a multifunctional mold for manufacturing composite co-cured hat stringer panels according to the present invention;
FIG. 2 is a schematic view of the overall mold and panel construction of a multi-functional mold for composite co-cured hat stringer panel fabrication in accordance with the present invention;
FIG. 3 is a schematic view of a partial structure of an end platen of a multi-functional mold for manufacturing composite co-cured hat stringer panels according to the present invention;
FIG. 4 is a schematic view of the XZ cross-sectional configuration of FIG. 3 illustrating a multi-functional mold for manufacturing composite co-cured hat stringer webs in accordance with the present invention;
FIG. 5 is a schematic view of the YZ cross-sectional structure of FIG. 3 illustrating a multi-functional mold for manufacturing composite co-cured hat stringer webs in accordance with the present invention;
FIG. 6 is a schematic diagram of a panel machine-tooling front structure of a multi-functional mold for composite co-cured hat stringer panel manufacture in accordance with the present invention;
FIG. 7 is a schematic diagram of a panel machine-finished construction of a multi-functional mold for composite co-cured hat stringer panel manufacture in accordance with the present invention;
FIG. 8 is a panel manufacturing flow chart of a multi-functional mold for composite co-cured hat stringer panel manufacture in accordance with the present invention.
In the figure: the wall plate cutting tool comprises a wall plate clean boundary cutter groove 1, a wall plate inner window opening cutter groove 2, a machine hole adding groove 3, a stringer groove 4, a vacuum air guide groove 5, a 6-end pressing plate, a 7-extension angle piece, a 8-withdrawal cutter groove, a 9-die sinking, a 10-wall plate, an 11-body die, a 12-core die and a 13-vacuum bag.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Referring to fig. 1-5, a multifunctional mold for manufacturing composite co-cured hat stringer panels comprises an integral mold 11, wherein a core mold 12 is mounted on the integral mold 11, and the multifunctional mold further comprises the following structure:
wall plate clean boundary cutter groove 1: the clean boundary knife groove reserved on the integral die 11 is filled with sacrificial materials in the wall plate clean boundary knife groove 1 for machining the clean boundary of the co-cured wall plate 10;
Wall plate inner window opening knife groove 2: the knife slot at the window opening in the wall plate 10 is also required to be filled with sacrificial materials for machining the window opening in the composite part;
Machining hole groove 3: the machining hole slot 3 on the integral die 11 is used for machining the machining hole in the composite part, the diameter of the machining hole slot 3 is determined by the diameter of the hole and the required tolerance, and the depth is the diameter of the hole plus the length of the drill bit tip;
stringer groove 4: the stringer groove 4 on the integral mold 11 is the position of the stringer of the wallboard 10 for placing the preformed stringer for subsequent co-curing with the skin;
vacuum air guide groove 5: the vacuum air guide groove 5 at the outer ring of the integral die 11 is connected with a vacuum pipeline below the integral die 11 and is used for providing uniform air guide for the whole wallboard 10 during vacuum packaging;
end press plate 6: the net boundary machining from the two ends of the stringer to the skin is performed, the end pressing plate 6 is a strip-shaped thin plate, and the end pressing plate 6 is made of invar steel or a composite material identical to the wallboard.
Extension angle piece 7: the device is used for connecting the integral die 11 with a numerical control machine tool;
relief slot 8: the tool retracting grooves 8 on the wall plate clean boundary tool grooves 1 extend the wall plate clean boundary tool grooves 1 towards the outer side of the part at certain intervals, and the tool retracting grooves 8 are used for discharging scraps generated in the machining process and preventing scraps from blocking the tool from advancing;
Mold sag 9: the end pressing plate 6 is used for placing, and as machining is firstly performed and then demolding is performed, the core mold 12 penetrating through the two ends of the integral mold 11 is not moved out during machining, the core mold 12 is cut by direct machining, and the wall plate clean boundary knife slot 1 cannot be formed on the core mold 12, so that the end pressing plate 6 with the wall plate clean boundary knife slot 1 needs to be sunk at the two ends of the integral mold 11 and placed, and the end pressing plate 6 is placed in the process of tooling preparation;
vacuum bag 13: is used for vacuum packaging.
Referring to fig. 6-7, fig. 6 and 7 are respectively machine-processed front and back of the wall panel 10, the machine-processed panel 10 has a 25mm margin around the wall panel, the tabs are cut into circular arcs, and 3 window openings are cut.
The invention provides a multifunctional die for manufacturing a composite co-cured hat-shaped stringer wallboard, wherein an integral die 11 is processed by using invar steel as a raw material, and prepreg paving, curing, machining and other procedures can be performed on the integral die 11 during manufacturing of a wallboard 10.
The unitary mold 11 uses the concept of internal mold surface forming, i.e., forming from the inner surface of the part. Simultaneously, in order to achieve the aim of co-curing the stringers and the skin, grooves for accommodating the stringers are dug downwards on the inner die surface of the tooling surface.
During manufacturing, firstly, the tool is cleaned and a release agent is applied, and then, the wall plate clean boundary knife groove, the wall plate inner window opening knife groove 2 and the machining hole groove 3 which are required to be machined by a numerical control machine are filled with sacrificial materials. The surface of the sacrificial material needs to be continuously scraped during the filling process so that the surface of the sacrificial material and the surface of the bulk mold 11 are as uniform as possible. The sacrificial material is then heat cured and after curing is completed the surface of the sacrificial material is polished to a point where the surface of the sacrificial material matches the bulk mold 11.
The stringers are then preformed, either using a hot embossing or a hot diaphragm forming process, and subsequently placed in the stringer grooves 4; a direct hand lay-up method in tooling stringer groove 4 may also be used. After the stringers are fully installed, installation mandrel 12 fills all of the cap stringer interior cavity space. After the core mold 12 is completely installed, the entire unitary mold 11 needs to be vacuum-compacted using the vacuum bag 13.
After the operation is finished, the automatic wire laying operation of the skin can be started, and after the skin is laid, the whole part is subjected to vacuum packaging and autoclave curing.
And after the solidification is finished, directly carrying out numerical control machining on the part on the forming tool, and processing the net boundary and the high-precision hole required by the part.
And finally, demolding and subsequent treatment are carried out on the processed part to finish the manufacturing. The specific flow is shown in figure 8.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (3)
1. A multifunctional mold for manufacturing composite co-cured hat stringer panels, comprising an integral mold, characterized by further comprising:
clean boundary knife slot of wall plate: the method comprises the steps that a clean boundary knife groove is reserved on the integral die, sacrificial materials are required to be filled in the clean boundary knife groove of the wallboard, and the clean boundary knife groove is used for machining the clean boundary of the co-cured wallboard;
Window opening knife slot in wallboard: the knife slot at the window opening in the wallboard is also required to be filled with sacrificial materials for machining the window opening in the composite part;
Machining a hole groove: the machining hole slot is used for machining the machining hole in the composite part, the diameter of the machining hole slot is determined by the diameter of the hole and the required tolerance, and the depth is the diameter of the hole plus the length of the drill bit tip;
Stringer groove: the position of the stringer groove on the integral mould is the position of the stringer of the wallboard, and is used for placing the preformed stringer for subsequent co-curing with the skin;
Vacuum air guide groove: the vacuum air guide groove of the outer ring of the integral die is connected with a vacuum pipeline below the integral die and is used for providing uniform air guide for the whole wallboard during vacuum packaging;
End clamp plate: the net boundary machining from the two ends of the stringer to the skin;
Extension angle piece: the device is used for connecting the integral die with a numerical control machine tool;
tool retracting groove: the tool retracting grooves on the wall plate clean boundary tool grooves extend towards the outer side of the part at regular intervals, the tool retracting groove is used for discharging scraps generated in the machining process, so that the scraps are prevented from blocking the tool to advance;
Sinking a die: the end pressing plate is used for placing the end pressing plate, and because the core mold penetrating through the two ends of the integral die is not moved out during machining, the core mold is cut by direct machining, and a wall plate clean boundary knife slot cannot be formed on the core mold, the end pressing plate with the wall plate clean boundary knife slot is required to be sunk at the two ends of the integral die and placed, and the end pressing plate is placed when the tool is ready;
vacuum bag: is used for vacuum packaging.
2. A multi-functional mold for the manufacture of composite co-cured hat stringer webs according to claim 1, wherein said end clamps are strip-like sheets and the material of the end clamps is invar or a composite material identical to the material of the webs.
3. A multi-functional mold for the manufacture of composite co-cured hat stringer webs according to claim 1, wherein said unitary mold has a mandrel mounted thereto.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411077455.3A CN118927666A (en) | 2024-08-07 | 2024-08-07 | A multifunctional mold for manufacturing composite co-cured hat-shaped long stringer wall panels |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411077455.3A CN118927666A (en) | 2024-08-07 | 2024-08-07 | A multifunctional mold for manufacturing composite co-cured hat-shaped long stringer wall panels |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118927666A true CN118927666A (en) | 2024-11-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202411077455.3A Pending CN118927666A (en) | 2024-08-07 | 2024-08-07 | A multifunctional mold for manufacturing composite co-cured hat-shaped long stringer wall panels |
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| Country | Link |
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| CN (1) | CN118927666A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1255076A (en) * | 1997-05-06 | 2000-05-31 | 波音公司 | Hybrid lay-up tool |
| US20040217497A1 (en) * | 2003-05-02 | 2004-11-04 | The Boeing Company | Triple purpose lay-up tool |
| US20120261057A1 (en) * | 2011-04-14 | 2012-10-18 | Spirit Aerosystems, Inc. | Method and tooling for manufacture of co-cured composite structures |
| CN104551703A (en) * | 2013-10-16 | 2015-04-29 | 刘玉 | Cutting work table of cutting machine |
| US20160236454A1 (en) * | 2015-02-12 | 2016-08-18 | Zodiac Seats Uk Limited | Tool for curing a composite component |
| CN207067956U (en) * | 2017-06-06 | 2018-03-02 | 天津宝兴威科技股份有限公司 | A kind of touch-screen glass substrate processes vacuum fixture |
-
2024
- 2024-08-07 CN CN202411077455.3A patent/CN118927666A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1255076A (en) * | 1997-05-06 | 2000-05-31 | 波音公司 | Hybrid lay-up tool |
| US20040217497A1 (en) * | 2003-05-02 | 2004-11-04 | The Boeing Company | Triple purpose lay-up tool |
| US20120261057A1 (en) * | 2011-04-14 | 2012-10-18 | Spirit Aerosystems, Inc. | Method and tooling for manufacture of co-cured composite structures |
| CN104551703A (en) * | 2013-10-16 | 2015-04-29 | 刘玉 | Cutting work table of cutting machine |
| US20160236454A1 (en) * | 2015-02-12 | 2016-08-18 | Zodiac Seats Uk Limited | Tool for curing a composite component |
| CN207067956U (en) * | 2017-06-06 | 2018-03-02 | 天津宝兴威科技股份有限公司 | A kind of touch-screen glass substrate processes vacuum fixture |
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Application publication date: 20241112 |