CN111911797A - Composite rectangular beam structure and manufacturing method thereof - Google Patents
Composite rectangular beam structure and manufacturing method thereof Download PDFInfo
- Publication number
- CN111911797A CN111911797A CN202010920258.9A CN202010920258A CN111911797A CN 111911797 A CN111911797 A CN 111911797A CN 202010920258 A CN202010920258 A CN 202010920258A CN 111911797 A CN111911797 A CN 111911797A
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- Prior art keywords
- layer
- pultrusion
- rectangular beam
- winding layer
- beam structure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16S—CONSTRUCTIONAL ELEMENTS IN GENERAL; STRUCTURES BUILT-UP FROM SUCH ELEMENTS, IN GENERAL
- F16S3/00—Elongated members, e.g. profiled members; Assemblies thereof; Gratings or grilles
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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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
The invention discloses a composite material rectangular beam structure and a manufacturing method thereof, wherein the composite material rectangular beam structure comprises an inner winding layer wound on the periphery of a rectangular mould, a plurality of circles of middle pultrusion layers are arranged on the periphery of the inner winding layer, a circle of inner winding layer is arranged between every two adjacent middle pultrusion layers, and a circle of outer winding layer is wound on the periphery of the middle pultrusion layer on the outermost side; the middle pultrusion layer is formed by splicing and combining a plurality of pultrusion plates and four fillet plates, the materials of the inner winding layer, the middle pultrusion layer and the outer winding layer are all made of fiber reinforced resin matrix composite materials, the method improves the axial elastic modulus of the rectangular beam by embedding the middle pultrusion layer in the middle of the wall thickness of the rectangular beam, and simultaneously, the inner layer and the outer layer of the rectangular beam are wound in the circumferential direction by combining spiral winding, so that the circumferential strength and the torsion resistance are ensured; the composite rectangular beam has small bending deformation, can be applied to engineering mechanical arm structural members, has stable movement, and improves the stability and the safety of a mechanism.
Description
Technical Field
The invention relates to the field of insulating type overhead working trucks, in particular to a rectangular beam structure made of composite materials and a manufacturing method thereof.
Background
The insulating type overhead working truck is widely applied to the field of live working of an electric power system, an insulating arm of the insulating type overhead working truck is mostly prepared from glass fiber reinforced resin matrix composite materials and wound into a cylindrical or rectangular section structure, and the insulating type overhead working truck has the advantages of light weight, high mechanical strength, good insulating property, strong hydrophobicity and the like. The telescopic insulating arm with the rectangular cross section is most widely used in the high-altitude operation vehicle, however, along with the longer and longer length of the telescopic insulating arm, the bending load and the torsion load are larger and larger, and in order to ensure the stability of the telescopic operation, the deformation of the telescopic arm must be controlled within a reasonable range, so that higher requirements are provided for the bending rigidity of the insulating arm.
The cross-sectional size of the insulated arm is often limited and increasing the bending stiffness (EI) of a rectangular cross-section through a reasonable lay design becomes critical. The small-angle spiral winding can improve the elastic modulus (E) of the axial material, but the performance of the material is still limited, and meanwhile, the nonlinear length of the two ends of the small-angle spiral winding is long, so that the material waste is large. The composite material sheet prepared by the pultrusion process has high modulus in the length direction but poor hoop performance. Therefore, the performance of the rectangular insulating arm can be effectively improved by combining the pultrusion process and the winding process and giving consideration to the axial rigidity and the circumferential strength through reasonable layering design.
Disclosure of Invention
In view of the technical defects, the invention aims to provide a composite material rectangular beam structure and a manufacturing method thereof, wherein a pre-prepared middle pultrusion layer is embedded in the middle of the wall thickness, so that the axial rigidity of the rectangular beam is effectively improved, and meanwhile, the inner and outer winding layers provide the annular strength and the torsion resistance of the structure.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention provides a rectangular beam structure made of composite materials and a manufacturing method thereof, wherein the rectangular beam structure comprises an inner winding layer wound on the periphery of a rectangular mould, a plurality of middle pultrusion layers are arranged on the periphery of the inner winding layer, the innermost middle pultrusion layer is tightly pressed on the inner winding layer, and a circle of inner winding layer is tightly pressed between every two adjacent middle pultrusion layers; the setting has the outer winding layer of round in outermost middle pultrusion layer peripheral winding, middle pultrusion layer is assembled the combination by a plurality of pultrusion board and four fillet boards and is formed, fibre reinforced resin base combined material is all chooseed for use to the material on interior winding layer, middle pultrusion layer and outer winding layer.
Preferably, the fiber in the fiber reinforced resin matrix composite material is glass fiber or carbon fiber, and the resin in the fiber reinforced resin matrix composite material is one or more of epoxy resin, vinyl ester resin or unsaturated polyester resin.
Preferably, the thickness of the middle pultrusion layer accounts for 1/4-2/3 of the total thickness of the rectangular beam structure.
Preferably, the thickness of the inner winding layer accounts for 1/4-2/3 of the total thickness of the rectangular beam structure.
Preferably, the thickness of the outer winding layer accounts for 1/6-1/3 of the total thickness of the rectangular beam structure.
The invention also provides a manufacturing method of the composite material rectangular beam structure, which specifically comprises the following steps:
s1, manufacturing a plurality of pultruded panels and a plurality of circular angle panels in advance according to design requirements; the fillet R1 of the round corner plate is designed according to the excircle corner of the inner winding layer, the excircle corner R2 of the round corner plate is designed according to the outer winding layer, and the length L and the width W of the pultruded plate are designed according to the width and the length of the inner winding layer;
s2, winding an inner winding layer 2 with a certain thickness on the rectangular mould in a spiral combined circumferential winding mode;
s3, after the inner winding layer is wound, assembling a pre-prepared pultrusion plate and a fillet plate on the periphery of the inner winding layer to form a middle pultrusion layer, and filling resin glue solution into a gap between the middle pultrusion layer and the inner winding layer;
s4, winding an outer winding layer with a certain thickness in a spiral combined annular winding mode at the periphery of the middle pultrusion layer according to the total thickness of the rectangular beam structure;
s5, and after the winding is finished in the step S4, the rectangular beam made of the high-rigidity composite material is obtained after the rectangular beam is completely cured through a curing process.
The invention has the beneficial effects that: according to the composite material rectangular beam prepared by the invention, the axial elastic modulus of the rectangular beam is improved by embedding the middle pultrusion layer in the middle of the wall thickness of the rectangular beam, and meanwhile, the annular strength and the torsion resistance of the rectangular beam are ensured by combining spiral winding and annular winding on the inner layer and the outer layer of the rectangular beam; the composite rectangular beam has small bending deformation, can be applied to engineering mechanical arm structural members, has stable movement, and improves the stability and the safety of a mechanism.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a rectangular beam structure made of a composite material according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a fillet structure according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a structure of a pultrusion plate provided by the embodiment of the invention.
Description of reference numerals:
1. a rectangular mold; 2. an inner wrap layer; 31. extruding and drawing a plate; 32. a round angle plate; 4. an outer wrap layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 3, a composite rectangular beam structure and a manufacturing method thereof include an inner winding layer 2 wound around the periphery of a rectangular mold 1, wherein an intermediate pultrusion layer is compressed around the periphery of the inner winding layer 2, and a circle of outer winding layer 4 is wound around the periphery of the intermediate pultrusion layer; the middle pultrusion layer is formed by assembling and combining a plurality of pultrusion plates 31 and four round angle plates 32, and the materials of the inner winding layer 2, the middle pultrusion layer and the outer winding layer 4 are all made of fiber reinforced resin matrix composite materials.
The fiber in the fiber reinforced resin matrix composite material is glass fiber or carbon fiber, and the resin in the fiber reinforced resin matrix composite material is one or more of epoxy resin, vinyl ester resin or unsaturated polyester resin.
The thickness of the middle pultrusion layer accounts for 1/4-2/3 of the total thickness of the rectangular beam structure.
The thickness of the inner winding layer 2 accounts for 1/4-2/3 of the total thickness of the rectangular beam structure.
The thickness of the outer winding layer 4 accounts for 1/6-1/3 of the total thickness of the rectangular beam structure.
The embodiment also provides a manufacturing method of the composite rectangular beam structure, which specifically comprises the following steps:
s1, manufacturing a plurality of pultruded panels 31 and a plurality of circular angle panels 32 in advance according to design requirements; the fillet R1 of the fillet plate 32 is designed according to the fillet of the inner winding layer 2, the fillet R2 of the fillet plate 32 is designed according to the outer winding layer 4, and the length L and the width W of the pultruded plate 31 are designed according to the width and the length of the inner winding layer 2;
s2, winding an inner winding layer 2 with a certain thickness on the rectangular mould 1 in a spiral combined circumferential winding mode;
s3, after the inner winding layer 2 is wound, assembling the pultrusion plate 31 and the fillet plate 32 which are prepared in advance and assembling the assembly on the periphery of the inner winding layer 2 to form a middle pultrusion layer, and filling resin glue solution into a gap between the middle pultrusion layer and the inner winding layer 2;
s4, winding an outer winding layer 4 with a certain thickness at the periphery of the middle pultrusion layer in a spiral combined annular winding mode according to the total thickness of the rectangular beam structure;
s5, and after the winding is finished in the step S4, the rectangular beam made of the high-rigidity composite material is obtained after the rectangular beam is completely cured through a curing process.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (6)
1. The composite rectangular beam structure is characterized by comprising an inner winding layer (2) wound on the periphery of a rectangular die (1), wherein a plurality of middle pultrusion layers are arranged on the periphery of the inner winding layer (2), the innermost middle pultrusion layer is tightly pressed on the inner winding layer (2), and a circle of inner winding layer (2) is tightly pressed between every two adjacent middle pultrusion layers; the setting has round outer winding layer (4) at outermost middle pultrusion layer periphery winding, middle pultrusion layer is assembled the combination by a plurality of pultrusion board (31) and four round angle board (32) and is formed, fibre reinforced resin base combined material is all chooseed for use to the material of interior winding layer (2), middle pultrusion layer and outer winding layer (4).
2. A rectangular beam structure of composite material according to claim 1, wherein the fibers in said fiber-reinforced resin-based composite material are glass fibers or carbon fibers, and the resin in said fiber-reinforced resin-based composite material is one or more of epoxy resin, vinyl ester resin or unsaturated polyester resin.
3. The rectangular composite beam structure of claim 1, wherein the thickness of the intermediate pultruded layer is 1/4-2/3 of the total thickness of the rectangular beam structure.
4. A rectangular beam structure of composite material according to claim 1, wherein the thickness of said inner wrap (2) is 1/4-2/3 of the total thickness of the rectangular beam structure.
5. A rectangular beam structure of composite material according to claim 1, wherein the thickness of the outer wrap (4) is 1/6-1/3 of the total thickness of the rectangular beam structure.
6. A method for manufacturing a rectangular beam structure of composite material according to any one of claims 1 to 5, comprising the following steps:
s1, manufacturing a plurality of pultruded panels (31) and a plurality of circular angle panels (32) according to design requirements; the fillet R1 of the round plate (32) is designed according to the excircle corner of the inner winding layer (2), the excircle corner R2 of the round plate (32) is designed according to the outer winding layer (4), and the length L and the width W of the pultrusion plate (31) are designed according to the width and the length of the inner winding layer (2);
s2, winding an inner winding layer (2) with a certain thickness on the rectangular mould 1 in a spiral combined hoop winding mode;
s3, after the inner winding layer (2) is wound, combining and assembling a pultrusion plate (31) and a circular angle plate (32) which are prepared in advance on the periphery of the inner winding layer (2) to form a middle pultrusion layer, and filling resin glue solution into a gap between the middle pultrusion layer and the inner winding layer (2);
s4, winding an outer winding layer (4) with a certain thickness in a spiral combined hoop winding mode at the periphery of the middle pultrusion layer according to the total thickness of the rectangular beam structure;
s5, and after the winding is finished in the step S4, the rectangular beam made of the high-rigidity composite material is obtained after the rectangular beam is completely cured through a curing process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010920258.9A CN111911797A (en) | 2020-09-04 | 2020-09-04 | Composite rectangular beam structure and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010920258.9A CN111911797A (en) | 2020-09-04 | 2020-09-04 | Composite rectangular beam structure and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111911797A true CN111911797A (en) | 2020-11-10 |
Family
ID=73267841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010920258.9A Pending CN111911797A (en) | 2020-09-04 | 2020-09-04 | Composite rectangular beam structure and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111911797A (en) |
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2020
- 2020-09-04 CN CN202010920258.9A patent/CN111911797A/en active Pending
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