CN117549574A - Auxiliary fixture for prepreg layering with fiber accurately oriented and accurate orientation method - Google Patents

Auxiliary fixture for prepreg layering with fiber accurately oriented and accurate orientation method Download PDF

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Publication number
CN117549574A
CN117549574A CN202311548984.2A CN202311548984A CN117549574A CN 117549574 A CN117549574 A CN 117549574A CN 202311548984 A CN202311548984 A CN 202311548984A CN 117549574 A CN117549574 A CN 117549574A
Authority
CN
China
Prior art keywords
prepreg
clung
limiting tool
paved
long
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202311548984.2A
Other languages
Chinese (zh)
Inventor
李伟东
段子琦
申鹏飞
杨焕志
钟翔屿
包建文
李晔
张连旺
张朋
张尧州
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AVIC Beijing Aeronautical Manufacturing Technology Research Institute
Original Assignee
AVIC Beijing Aeronautical Manufacturing Technology Research Institute
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by AVIC Beijing Aeronautical Manufacturing Technology Research Institute filed Critical AVIC Beijing Aeronautical Manufacturing Technology Research Institute
Priority to CN202311548984.2A priority Critical patent/CN117549574A/en
Publication of CN117549574A publication Critical patent/CN117549574A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • 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
    • B29C70/541—Positioning reinforcements in a mould, e.g. using clamping means for the reinforcement
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T50/00—Aeronautics or air transport
    • Y02T50/40—Weight reduction

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Composite Materials (AREA)
  • Mechanical Engineering (AREA)
  • Moulding By Coating Moulds (AREA)

Abstract

The invention relates to the technical field of prepreg preparation and processing, in particular to a prepreg layering auxiliary tool with accurately oriented fibers and an accurately oriented method. The fixture comprises a limiting fixture and a reference label, wherein the length of the long side of the right-angle side of the L-shaped part is larger than the length of the wide side of the prepreg to be paved, the adjacent right-angle side of the prepreg can be clung to the limiting fixture when being paved, the accuracy of the prepreg paving direction in the paving process is guaranteed, the reference label is clung to the limiting fixture after being paved to be clung to the surface prepreg in parallel, the prepreg is packaged, cured and formed into a laminated plate, and then the laminated plate is used as a machining reference line, so that the accuracy of the adding direction of the laminated plate of the composite material can be guaranteed, and the mechanical property of the composite material along the fiber axial direction can be accurately embodied.

Description

Auxiliary fixture for prepreg layering with fiber accurately oriented and accurate orientation method
Technical Field
The invention relates to the technical field of prepreg preparation and processing, in particular to a prepreg layering auxiliary tool with accurately oriented fibers and an accurately oriented method.
Background
The advanced resin matrix composite has the advantages of excellent specific strength, specific rigidity, fatigue resistance, designability and the like, and along with the increasing of the requirements of aerospace aircrafts on light weight, the advanced resin matrix composite is increasingly widely applied to main bearing structures in the aerospace field.
In the whole process from fiber production to prepreg preparation, blanking and laying and then curing and forming of the composite material, buckling and deflection of the fibers can occur, the collimation degree of the fibers in the composite material is reduced, and meanwhile, mechanical processing deviation can also cause deviation of fiber orientation in the composite material, so that the mechanical property of the composite material is lost. The literature shows that for 0 ° compression performance of the composite, a 1% shift in carbon fiber orientation results in a 20% decrease in strength, up to 50% decrease in strength at 3% shift. Therefore, improving the fiber collimation degree in the composite material is a key for guaranteeing the exertion of the mechanical property of the composite material.
In the whole process from fiber production to prepreg preparation, blanking and laying and then curing and forming of the composite material, buckling and deflection of the fibers can occur, the collimation degree of the fibers in the composite material is reduced, and meanwhile, mechanical processing deviation can also cause deviation of fiber orientation in the composite material, so that the mechanical property of the composite material is lost. However, no technology for accurately orienting fibers exists in China at present.
Therefore, it is desirable to provide a prepreg layup auxiliary tool and a method for accurately orienting fibers to solve the problems of the prior art.
Disclosure of Invention
(1) Technical problem to be solved
The invention aims to provide a prepreg layering auxiliary tool and a prepreg layering auxiliary method for accurately orienting fibers, so as to ensure the accuracy of the prepreg layering direction and the adding direction of a composite flat machine, obtain a composite sample piece with accurate fiber orientation, and accurately reflect the mechanical property of a composite along the axial direction of the fibers.
(2) Technical proposal
In a first aspect, the invention provides a prepreg layup aid for accurately orienting fibers, comprising: the device comprises a limiting tool and a reference label, wherein the limiting tool is an L-shaped piece, the inner angle of the L-shaped piece is a right angle, the length of the long side of the right angle side of the L-shaped piece is larger than the length of the wide side of prepreg to be paved, the wide side of the prepreg is aligned along the long side of the L-shaped piece when the prepreg is paved, and the long side of the prepreg is aligned along the other right angle side of the L-shaped piece; the standard label is long-strip-shaped, and after the prepreg is paved, the standard label is clung to the long side of the limiting tool and is clung to the surface prepreg in parallel.
The two reference labels are respectively clung to the long sides of the limiting tool and are attached to the two ends of the wide side of the surface prepreg in parallel.
The thickness of the long side of the limiting tool is 10-30 mm, and the length of the long side of the limiting tool is more than 350mm.
Wherein, the reference label is high temperature resistant polyimide tape.
Wherein the width of the reference label is 10-15 mm.
The method for accurately orienting the fibers during the addition of the prepreg paving machine provided by the other aspect of the invention comprises the following steps:
when the cut prepreg is paved and stuck according to the layering sequence, two adjacent right-angle edges of the prepreg are clung to the inner angles of the limiting tool;
the long edge of the reference label, which is clung to the limiting tool, is clung to the surface prepreg in parallel;
packaging, solidifying and forming the laid prepreg to form a laminated plate;
when the laminating machine is added, the standard mark is used as a reference line for machine addition.
Wherein, the inner angle of the spacing frock is hugged closely to two adjacent right-angle edges of step preimpregnation material specifically is: the prepreg broadsides are aligned along the long sides of the L-shaped member and the long sides of the prepreg are aligned along the other right angle side of the L-shaped member.
When the long sides of the reference labels, which are clung to the limiting tool, are clung to the surface prepreg in parallel, the two reference labels are clung to the two ends of the wide side of the surface prepreg in parallel respectively.
(3) Advantageous effects
According to the prepreg layering auxiliary tool and the accurate orienting method, the limiting tool and the reference label are arranged, firstly, the inner angle of the L-shaped piece is a right angle, the length of the long side of the right-angle side of the L-shaped piece is larger than the length of the wide side of the prepreg to be layered, when the prepreg is paved, the adjacent right-angle side of the prepreg can be clung to the limiting tool, the accuracy of the prepreg layering direction in the paving process is guaranteed, secondly, the reference label is clung to the limiting tool and is clung to the surface prepreg in parallel after the paving is completed, after the prepreg is packaged, cured and formed into a laminated plate, the accuracy of the adding direction of the composite material laminating machine can be guaranteed, the composite material sample piece with accurate fiber orientation can be obtained, and the mechanical property of the composite material along the fiber axial direction is accurately reflected.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort to a person of ordinary skill in the art.
FIG. 1 is a schematic illustration of the use of a fiber-precisely-oriented prepreg layup assist tool in a prepreg layup process according to an embodiment of the present invention;
fig. 2 is a schematic illustration of the fiber accurate orientation prepreg layup assist tool of an embodiment of the present invention with reference edge determination at the time of ply bonding.
In the figure:
1-limiting a tool; 2-reference tags; 3, prepreg; 4-laminate.
Detailed Description
Embodiments of the present invention are described in further detail below with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the invention and are not intended to limit the scope of the invention, i.e., the invention is not limited to the embodiments described, but covers any modifications, substitutions and improvements in parts, components and connections without departing from the spirit of the invention.
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in fig. 1 and 2, the prepreg ply auxiliary tool for accurately orienting fibers provided by the invention comprises: the device comprises a limiting tool 1 and a reference label 2, wherein the limiting tool is an L-shaped piece, the inner angle of the L-shaped piece is a right angle, the inner angle is 90 degrees, the surface is flat and smooth, the length of the long side of the right-angle side of the L-shaped piece is larger than the length of the wide side of a prepreg to be laid, the wide side of the prepreg is aligned with the long side of the L-shaped piece when the prepreg 3 is laid, and the long side of the prepreg is aligned with the other right-angle side of the L-shaped piece; the standard label is long-strip-shaped, and after the prepreg is paved, the standard label is clung to the long side of the limiting tool and is clung to the surface prepreg in parallel. Wherein, the thickness of the prepreg single layer is less than 1mm, and the number of layers is 2-20.
According to the technical scheme, the limiting tool and the reference label are arranged, firstly, the inner angle of the L-shaped piece is a right angle, the length of the long side of the right-angle side of the L-shaped piece is larger than the length of the wide side of the prepreg to be paved, the adjacent right-angle side of the prepreg can be clung to the limiting tool when the prepreg is paved, the accuracy of the prepreg paving direction in the paving process is guaranteed, secondly, the reference label is clung to the limiting tool and is clung to the surface prepreg in parallel after the paving is completed, after the prepreg is packaged, cured and formed into a laminated plate, the accuracy of the adding direction of the laminated plate machine of the composite material can be guaranteed, the composite material sample piece with accurate fiber orientation can be obtained, and the mechanical property of the composite material along the fiber axial direction is accurately reflected.
Preferably, the two reference labels are respectively clung to the long sides of the limiting tool and are attached to the two ends of the wide side of the surface prepreg in parallel, so that the accuracy of the laminating machine in the cutting direction is more effectively ensured.
Specifically, the thickness of the long side of the limiting tool is 10-30 mm, and the height of the long side of the limiting tool is greater than 50mm, so that the height requirement for accommodating the prepreg ply is ensured.
Preferably, the reference label is a high temperature resistant polyimide tape.
Specifically, the width of the reference label is 10-15 mm. The reference label has two parallel sides, one parallel side abutting against the long side of the L-shaped member right angle side.
The method for accurately orienting the fibers during the addition of the prepreg paving machine provided by the other aspect of the invention comprises the following steps:
when the cut prepreg is paved and stuck according to the layering sequence, two adjacent right-angle edges of the prepreg are clung to the inner angles of the limiting tool;
the long edge of the reference label, which is clung to the limiting tool, is clung to the surface prepreg in parallel;
packaging and curing the laid prepreg to form a laminated board 4;
when the laminated board 4 is machined, the reference label is used as a reference line for machining.
Preferably, the inner angles of the two adjacent right-angle edges of the prepreg close to the limiting tool are specifically: the prepreg broadsides are aligned along the long sides of the L-shaped member and the long sides of the prepreg are aligned along the other right angle side of the L-shaped member.
Preferably, when the long sides of the reference labels, which are clung to the limiting tool, are clung to the surface prepreg in parallel, the two reference labels are clung to the long sides of the limiting tool respectively and are clung to the two ends of the wide side of the surface prepreg in parallel. And then the prepreg is packaged, cured, molded and machined, and the accuracy of the machining direction is ensured by taking the label as a reference during machining.
According to the technical scheme, the short sides (broadsides) of the prepregs are firstly paved on a die or a layer of the prepreg in order along the long sides of the tool, and then the rest parts are aligned to finish the paving of the layer of the prepreg, so that the accurate paving direction of the prepreg is ensured. After the layering is finished, the reference labels are adhered to the two ends of the surface prepreg in parallel along the tight-fitting limit tool, and then are packaged, cured and formed. The resin flow in the prepreg during curing can cause irregularities in the four sides of the laminate and affect the laminate machining, and therefore requires machining based on the reference label.
As shown in fig. 2, when the laminated board 4 is machined, one side is cut along the reference label, and machining is performed with the cut side as the reference side. The relative positions of the reference label and the prepreg ply are not changed during curing, so that the accuracy of the machining direction can be improved by machining with reference to the reference edge.
It should be understood that, in the present specification, each embodiment is described in an incremental manner, and the same or similar parts between the embodiments are all referred to each other, and each embodiment is mainly described in a different point from other embodiments. For embodiments of the method, reference may be made to a partial description of embodiments of the apparatus (employed in accordance with the written matter). The invention is not limited to the specific steps and structures described above and shown in the drawings. Also, a detailed description of known method techniques is omitted here for the sake of brevity.
The foregoing is merely exemplary of the present application and is not limited thereto. Various modifications and alterations of this application will become apparent to those skilled in the art without departing from the scope of this invention. Any modifications, equivalent substitutions, improvements, etc. which are within the spirit and principles of the present application are intended to be included within the scope of the claims of the present application.

Claims (8)

1. Accurate directional prepreg layering auxiliary fixtures of fibre, its characterized in that includes: the device comprises a limiting tool and a reference label, wherein the limiting tool is an L-shaped piece, the inner angle of the L-shaped piece is a right angle, the length of the long side of the right angle side of the L-shaped piece is larger than the length of the wide side of prepreg to be paved, the wide side of the prepreg is aligned along the long side of the L-shaped piece when the prepreg is paved, and the long side of the prepreg is aligned along the other right angle side of the L-shaped piece; the standard label is long-strip-shaped, and after the prepreg is paved, the standard label is clung to the long side of the limiting tool and is clung to the surface prepreg in parallel.
2. The prepreg layup auxiliary fixture with accurately oriented fibers according to claim 1, wherein the two reference labels are respectively attached to the two ends of the wide side of the surface prepreg in parallel with the long side of the limiting fixture.
3. The fiber-precisely-oriented prepreg layup auxiliary tool according to claim 1, wherein the thickness of the long side of the limiting tool is 10-30 mm, and the length is more than 350mm.
4. A prepreg layup aid tooling for accurate fiber orientation according to claim 3 wherein the fiducial label is a high temperature resistant polyimide tape.
5. The fiber-precisely-oriented prepreg layup aid of claim 4, wherein the fiducial label width is 10-15 mm.
6. A method for accurately orienting fibers during prepreg paving machine processing, which is characterized by comprising the following steps:
when the cut prepreg is paved and stuck according to the layering sequence, two adjacent right-angle edges of the prepreg are clung to two inner angle edges of the limiting tool;
the long edge of the reference label, which is clung to the limiting tool, is clung to the surface prepreg in parallel;
packaging, solidifying and forming the laid prepreg to form a laminated plate;
when the laminating machine is added, the reference label is used as a reference line for machine adding.
7. The method for accurately orienting fibers in a prepreg tape laying machine according to claim 6, wherein the inner corners of the limiting tool for tightly adhering the adjacent right-angle edges of the prepreg in the step are specifically: the prepreg broadsides are aligned along the long sides of the L-shaped member and the long sides of the prepreg are aligned along the other right angle side of the L-shaped member.
8. The method for accurately orienting fibers during feeding of a prepreg paving machine according to claim 8, wherein when the long sides of the reference labels, which are clung to the limiting tool, are clung to the surface prepreg in parallel, the long sides of the two reference labels, which are clung to the limiting tool, are clung to the two ends of the wide side of the surface prepreg in parallel.
CN202311548984.2A 2023-11-20 2023-11-20 Auxiliary fixture for prepreg layering with fiber accurately oriented and accurate orientation method Pending CN117549574A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311548984.2A CN117549574A (en) 2023-11-20 2023-11-20 Auxiliary fixture for prepreg layering with fiber accurately oriented and accurate orientation method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311548984.2A CN117549574A (en) 2023-11-20 2023-11-20 Auxiliary fixture for prepreg layering with fiber accurately oriented and accurate orientation method

Publications (1)

Publication Number Publication Date
CN117549574A true CN117549574A (en) 2024-02-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311548984.2A Pending CN117549574A (en) 2023-11-20 2023-11-20 Auxiliary fixture for prepreg layering with fiber accurately oriented and accurate orientation method

Country Status (1)

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