CN111761843A - Forming device and forming method for composite material with I-shaped cross section cross structure - Google Patents

Forming device and forming method for composite material with I-shaped cross section cross structure Download PDF

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Publication number
CN111761843A
CN111761843A CN202010680146.0A CN202010680146A CN111761843A CN 111761843 A CN111761843 A CN 111761843A CN 202010680146 A CN202010680146 A CN 202010680146A CN 111761843 A CN111761843 A CN 111761843A
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China
Prior art keywords
forming
composite material
cross
section
shaped
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Pending
Application number
CN202010680146.0A
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Chinese (zh)
Inventor
武海鹏
孙云龙
梁钒
刘永纯
路明坤
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Harbin FRP Institute Co Ltd
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Harbin FRP Institute Co Ltd
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Priority to CN202010680146.0A priority Critical patent/CN111761843A/en
Publication of CN111761843A publication Critical patent/CN111761843A/en
Pending legal-status Critical Current

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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
    • B29C70/40—Shaping or impregnating by compression not applied
    • B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
    • B29C70/46—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
    • 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
    • B29C33/30—Mounting, exchanging or centering
    • B29C33/301—Modular mould systems [MMS], i.e. moulds built up by stacking mould elements, e.g. plates, blocks, rods

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

Abstract

The invention provides a composite material forming device and a composite material forming method with an I-shaped cross section cross structure, and belongs to the field of composite material forming. The problem of current I shape cross section crossing structure's combined material work piece be difficult to the shaping is solved. It includes inboard forming mechanism and external mold, inboard forming mechanism includes a plurality of inboard forming unit, and every inboard forming unit all includes mandrel and centre form, the mandrel is the rectangle structure, the centre form sets up around the mandrel to with the mandrel outside is fixed continuous, centre form interconnect in a plurality of inboard forming unit constitutes the intersection structure, the quantity of external mold is two, and two external molds set up respectively at forming mechanism's top surface and bottom surface. The method is mainly used for forming the composite material workpiece with the cross structure of the I-shaped section.

Description

Forming device and forming method for composite material with I-shaped cross section cross structure
Technical Field
The invention belongs to the field of composite material forming, and particularly relates to a composite material forming device and a composite material forming method for an I-shaped cross section cross structure.
Background
The composite material workpiece with the cross structure of the I-shaped section consists of a composite material longitudinal rib and transverse rib cross structure, wherein the longitudinal rib and the transverse rib are I-shaped sections and consist of an upper panel, a lower panel and a web plate. As shown in fig. 8, the conventional forming apparatus and the conventional forming method are used to form the inner and outer sides of the product in a surrounding manner, and the upper and lower surfaces are formed separately, so that the side surface and the surface are not continuous with fibers and are connected only by interfacial adhesion.
Disclosure of Invention
The invention provides a device and a method for molding a composite material with an I-shaped cross section cross structure, which aim to solve the problems in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a I shape cross section cross structure's combined material forming device, it includes inboard forming mechanism and external mold, inboard forming mechanism includes a plurality of inboard shaping units, and every inboard shaping unit all includes mandrel and centre form, the mandrel is the rectangle structure, the centre form sets up around the mandrel to with the mandrel outside is fixed continuous, centre form interconnect in a plurality of inboard shaping units constitutes the intersection structure, the quantity of external mold is two, and two external molds set up respectively at forming mechanism's top surface and bottom surface.
Furthermore, the inner die is of a strip-shaped rectangular structure.
Furthermore, the number of the inner molds in each inner side forming unit is four, and the four inner molds are sequentially connected with each other and arranged around the core mold and fixedly connected with the outer side of the core mold.
Furthermore, the inner die and the core die are fixedly connected through the pin holes and the threaded holes.
Further, the core mold has a circular rectangular structure.
Furthermore, the shape of the outer die is the same as the cross section shape of the inner forming mechanism.
The invention also provides a method for forming the composite material with the cross structure of the I-shaped section, which comprises the following steps:
the method comprises the following steps: the composite material is arranged on the outer side of the inner die according to the shape of the inner die, so that the continuity of the fiber is ensured;
step two: after the composite material on the outer side of the inner mold is molded, the inner mold is connected with the core mold to form an inner side molding unit;
step three: connecting the inner molds in the inner molding units with each other to form an inner molding mechanism with a cross structure, and molding the inner sides of an upper panel, a lower panel and a web plate of the I-shaped section;
step four: forming the outer side surfaces of the upper surface and the lower surface of the I-shaped section to ensure that the outer side fibers of the upper surface and the lower surface of the I-shaped section are continuous;
step five: and (3) applying pressure to the upper surface and the lower surface of the inner side forming mechanism by using an outer die to ensure the structural size.
Still further, the composite material is comprised of reinforcing fibers and a matrix material.
Still further, the reinforcing fibers comprise a carbon fiber fabric, a glass fiber fabric or a basalt fiber fabric, and the matrix material comprises an epoxy thermosetting resin, a polyester thermosetting resin or a phenolic thermosetting resin.
Compared with the prior art, the invention has the beneficial effects that: the invention solves the problem that the composite material workpiece with the cross structure of the existing I-shaped section is difficult to form. The product workpiece structure is an I-shaped cross section longitudinal and transverse rib cross structure, the web plate of the I-shaped cross section effectively improves the section inertia moment of the single structure, the rigidity of the whole structure is guaranteed, the composite material single structure adopts split die forming and co-curing technology, the fiber continuity is good, the whole structure is guaranteed to have good bearing capacity, the forming device belongs to a modular structure, and the number of the inner side forming units can be determined according to the size of the product. The workpiece is suitable for composite material structures of aerospace, aviation, traffic and the like, has high strength, convenient forming, high bearing capacity and good rigidity, and is suitable for the use of a main bearing structure of the composite material.
Drawings
FIG. 1 is a schematic structural view of an inner side forming mechanism of a composite material forming device with an I-shaped cross section structure according to the invention;
FIG. 2 is a schematic structural diagram of an outer mold of the composite material molding device with an I-shaped cross section structure according to the invention;
FIG. 3 is a schematic diagram of a first step of the method for forming a composite material with an I-shaped cross-section cross structure according to the present invention;
FIG. 4 is a schematic diagram of a second step of the method for forming a composite material with an I-shaped cross-section cross structure according to the present invention;
FIG. 5 is a schematic diagram of a third step of the method for forming a composite material with an I-shaped cross-section cross structure according to the present invention;
FIG. 6 is a schematic diagram illustrating a fourth step of the method for forming a composite material with an I-shaped cross-section structure according to the present invention;
FIG. 7 is a schematic diagram illustrating a fifth step of a method for forming a composite material with an I-shaped cross-section cross structure according to the present invention;
FIG. 8 is a schematic top view of a cross-sectional I-shaped cross-sectional workpiece according to the present invention;
fig. 9 is a schematic cross-sectional structure view of a workpiece with an i-shaped cross-section cross structure according to the present invention.
2-core mould, 3-inner mould, 4-outer mould, 5-upper panel, 6-web inner side, 7-lower panel, 8-upper surface and 9-lower surface.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely explained below with reference to the drawings in the embodiments of the present invention.
Referring to fig. 1-9 to illustrate the present embodiment, an apparatus for forming a composite material with an i-shaped cross section includes an inner forming mechanism and two outer molds 4, the inner forming mechanism includes a plurality of inner forming units, each inner forming unit includes a core mold 2 and an inner mold 3, the core mold 2 is rectangular, the inner molds 3 are disposed around the core mold 2 and fixedly connected to the outer sides of the core mold 2, the inner molds 3 in the inner forming units are connected to each other to form a cross structure, the number of the outer molds 4 is two, and the two outer molds 4 are disposed on the top surface and the bottom surface of the forming mechanism, respectively.
The centre form 3 of this embodiment is strip rectangle structure, and 3 quantity of centre forms in every inboard shaping unit are four, and four centre forms 3 link to each other in proper order and set up around the mandrel 2 to with the mandrel 2 outside is fixed continuous, centre form 3 and mandrel 2 pass through pinhole and screw hole fixed connection, and mandrel 2 is cyclic annular rectangle structure, and the shape of external mold 4 is the same with inboard forming mechanism cross-sectional shape. The core mold 2 is used for positioning and fixing the inner mold 3, the inner mold 3 is connected and fixed with the corresponding hole positions of the core mold 2 through pin holes and threaded holes, the inner mold 2 is used for forming an upper panel 5, a lower panel 7 and a web plate inner side 6 of an I-shaped section of the composite material longitudinal and transverse rib cross structural unit, after the inner mold 3 is formed, the inner mold 2 is assembled in place, the surface parts of an upper surface 8 and a lower surface 9 of the outer side of the I-shaped section are integrally formed, and the outer mold 4 is used for applying pressure to the upper panel and the lower panel of the I-shaped section to ensure the size of a product.
The embodiment is a method for forming a composite material with an I-shaped cross section cross structure, which comprises the following steps:
the method comprises the following steps: arranging the composite material on the outer side of the inner die 3 according to the shape of the inner die 3 to ensure the continuity of the fiber;
step two: after the composite material on the outer side of the inner mold 3 is molded, the inner mold 3 is connected with the core mold 2 to form an inner side molding unit;
step three: connecting the inner molds 3 in the inner side forming units with each other to form an inner side forming mechanism with a cross structure, and forming an upper panel 5, a lower panel 7 and a web inner side 6 with I-shaped sections;
step four: forming the outer side surfaces of the upper surface 8 and the lower surface 9 of the I-shaped section to ensure that the outer side fibers of the upper surface and the lower surface of the I-shaped section are continuous;
step five: the outer die 4 is used for applying pressure on the surfaces of the upper surface 8 and the lower surface 9 of the inner side forming mechanism to ensure the structural size. Still further, the composite material is comprised of reinforcing fibers and a matrix material.
The composite material consists of reinforced fiber and matrix material, the reinforced fiber includes carbon fiber fabric, glass fiber fabric or basalt fiber fabric, and the matrix material includes epoxy thermosetting resin, polyester thermosetting resin or phenolic thermosetting resin. The process molding can adopt a prepreg laying or hand pasting process for molding.
The forming device and the forming method for the composite material with the I-shaped cross section cross structure provided by the invention are described in detail, specific examples are applied in the text to explain the principle and the implementation mode of the invention, and the description of the examples is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims (9)

1. The utility model provides a combined material forming device of I shape cross section crossing structure which characterized in that: it includes inboard forming mechanism and external mold (4), inboard forming mechanism includes a plurality of inboard forming unit, and every inboard forming unit all includes mandrel (2) and centre form (3), mandrel (2) are the rectangle structure, centre form (3) set up around mandrel (2) to it links to each other with mandrel (2) outside is fixed, centre form (3) interconnect in a plurality of inboard forming unit constitutes the intersection structure, the quantity of external mold (4) is two, and two external molds (4) set up respectively at forming mechanism's top surface and bottom surface.
2. The apparatus for forming a composite material having an i-shaped cross-sectional intersection structure according to claim 1, wherein: the inner mold (3) is of a strip-shaped rectangular structure.
3. The apparatus for forming a composite material having an i-shaped cross-sectional intersection structure according to claim 1, wherein: the number of the inner molds (3) in each inner side forming unit is four, and the four inner molds (3) are sequentially connected with each other and arranged around the core mold (2) and fixedly connected with the outer side of the core mold (2).
4. The apparatus for forming a composite material having an i-shaped cross-sectional intersection structure according to claim 1, wherein: the inner die (3) and the core die (2) are fixedly connected through the pin holes and the threaded holes.
5. The apparatus for forming a composite material having an i-shaped cross-sectional intersection structure according to claim 1, wherein: the core mold (2) is of an annular rectangular structure.
6. The apparatus for forming a composite material having an i-shaped cross-sectional intersection structure according to claim 1, wherein: the shape of the outer die (4) is the same as the shape of the cross section of the inner side forming mechanism.
7. A method for forming a composite material forming apparatus of an i-section cross structure according to claim 1, characterized in that: it comprises the following steps:
the method comprises the following steps: arranging the composite material on the outer side of the inner die (3) according to the shape of the inner die (3) to ensure the continuity of the fiber;
step two: after the composite material on the outer side of the inner mold (3) is molded, the inner mold (3) is connected with the core mold (2) to form an inner side molding unit;
step three: connecting the inner molds (3) in the inner side forming units with each other to form an inner side forming mechanism with a cross structure, and forming an upper panel (5), a lower panel (7) and a web inner side (6) with I-shaped sections;
step four: forming the outer side surfaces of the upper surface (8) and the lower surface (9) of the I-shaped section to ensure that the outer side fibers of the upper surface and the lower surface of the I-shaped section are continuous;
step five: and an outer die (4) is used for applying pressure to the surfaces of the upper surface (8) and the lower surface (9) of the inner side forming mechanism to ensure the structure size.
8. The method for forming a composite material with an I-shaped cross-section cross structure according to claim 7, wherein the method comprises the following steps: the composite material is composed of reinforcing fibers and a matrix material.
9. The method for forming a composite material with an I-shaped cross-section cross structure according to claim 8, wherein the method comprises the following steps: the reinforcing fibers comprise carbon fiber fabrics, glass fiber fabrics or basalt fiber fabrics, and the matrix material comprises epoxy thermosetting resin, polyester thermosetting resin or phenolic thermosetting resin.
CN202010680146.0A 2020-07-15 2020-07-15 Forming device and forming method for composite material with I-shaped cross section cross structure Pending CN111761843A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010680146.0A CN111761843A (en) 2020-07-15 2020-07-15 Forming device and forming method for composite material with I-shaped cross section cross structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010680146.0A CN111761843A (en) 2020-07-15 2020-07-15 Forming device and forming method for composite material with I-shaped cross section cross structure

Publications (1)

Publication Number Publication Date
CN111761843A true CN111761843A (en) 2020-10-13

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ID=72725584

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010680146.0A Pending CN111761843A (en) 2020-07-15 2020-07-15 Forming device and forming method for composite material with I-shaped cross section cross structure

Country Status (1)

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CN (1) CN111761843A (en)

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