CN111169038A - Fiber reinforced composite material nut and preparation method thereof - Google Patents
Fiber reinforced composite material nut and preparation method thereof Download PDFInfo
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- CN111169038A CN111169038A CN202010005746.7A CN202010005746A CN111169038A CN 111169038 A CN111169038 A CN 111169038A CN 202010005746 A CN202010005746 A CN 202010005746A CN 111169038 A CN111169038 A CN 111169038A
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- 239000000463 material Substances 0.000 title claims abstract description 72
- 239000003733 fiber-reinforced composite Substances 0.000 title claims abstract description 49
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 239000004744 fabric Substances 0.000 claims abstract description 98
- 239000000835 fiber Substances 0.000 claims abstract description 54
- 238000004804 winding Methods 0.000 claims abstract description 52
- 239000011162 core material Substances 0.000 claims abstract description 51
- 239000002131 composite material Substances 0.000 claims abstract description 22
- 238000003754 machining Methods 0.000 claims abstract description 9
- 230000001070 adhesive effect Effects 0.000 claims description 45
- 239000000853 adhesive Substances 0.000 claims description 44
- 238000010438 heat treatment Methods 0.000 claims description 26
- 239000003822 epoxy resin Substances 0.000 claims description 25
- 229920000647 polyepoxide Polymers 0.000 claims description 25
- 238000001723 curing Methods 0.000 claims description 20
- 239000003365 glass fiber Substances 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 15
- 238000000465 moulding Methods 0.000 claims description 12
- 238000005520 cutting process Methods 0.000 claims description 11
- USIUVYZYUHIAEV-UHFFFAOYSA-N diphenyl ether Chemical compound C=1C=CC=CC=1OC1=CC=CC=C1 USIUVYZYUHIAEV-UHFFFAOYSA-N 0.000 claims description 10
- 238000002791 soaking Methods 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 9
- 238000004046 wet winding Methods 0.000 claims description 6
- 238000005490 dry winding Methods 0.000 claims description 5
- 238000003475 lamination Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 229920002748 Basalt fiber Polymers 0.000 claims description 2
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 2
- 239000004642 Polyimide Substances 0.000 claims description 2
- 229920003180 amino resin Polymers 0.000 claims description 2
- 239000004760 aramid Substances 0.000 claims description 2
- 229920006231 aramid fiber Polymers 0.000 claims description 2
- 239000004917 carbon fiber Substances 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 2
- 229920000728 polyester Polymers 0.000 claims description 2
- 229920001721 polyimide Polymers 0.000 claims description 2
- 238000004321 preservation Methods 0.000 claims description 2
- 229920006305 unsaturated polyester Polymers 0.000 claims description 2
- 239000004962 Polyamide-imide Substances 0.000 claims 1
- 229920002312 polyamide-imide Polymers 0.000 claims 1
- 238000010030 laminating Methods 0.000 abstract description 12
- 238000005260 corrosion Methods 0.000 abstract description 6
- 230000007797 corrosion Effects 0.000 abstract description 6
- 238000003825 pressing Methods 0.000 abstract description 6
- 230000002787 reinforcement Effects 0.000 abstract description 2
- 239000011521 glass Substances 0.000 description 51
- 239000010410 layer Substances 0.000 description 24
- 238000011056 performance test Methods 0.000 description 10
- 238000009413 insulation Methods 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 6
- 238000007598 dipping method Methods 0.000 description 5
- 239000002905 metal composite material Substances 0.000 description 4
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- 229920005989 resin Polymers 0.000 description 3
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- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 239000004840 adhesive resin Substances 0.000 description 1
- 229920006223 adhesive resin Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- -1 copper) Chemical class 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 150000003949 imides Chemical class 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
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- 229920000768 polyamine Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011208 reinforced composite material Substances 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Images
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
- B29C70/345—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 matched moulds
-
- 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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
-
- 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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B37/00—Nuts or like thread-engaging members
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- General Engineering & Computer Science (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
The invention discloses a fiber reinforced composite material nut which comprises an inner core material and a composite winding layer wound outside the inner core material, wherein the inner core material is formed by pressing one or more layers of overlapped fiber-fabric preimpregnated materials, and the composite winding layer is obtained by curing one or more layers of overlapped continuous fiber preimpregnated materials or fiber-fabric preimpregnated materials. The integral mechanical property is excellent, and the insulating, heat insulating, high weather resistance, corrosion resistance, light weight and other properties are provided. The invention also discloses a preparation method of the fiber reinforced composite material nut, which comprises the steps of firstly preparing the inner core material in a laminating mode, improving the longitudinal tension, then winding the composite winding layer outside the inner core material in a winding forming mode to prepare a nut blank, improving the transverse mechanical property, thereby achieving the simultaneous reinforcement in the transverse direction and the longitudinal direction, and finally preparing the nut in a machining mode.
Description
Technical Field
The invention belongs to the field of nut manufacturing and processing, and particularly relates to a fiber reinforced composite material nut and a preparation method thereof.
Background
The nut is a nut, and bolts or screws of the same specification are screwed together through threads on the inner side to play a role in fastening. At present, nuts in the market are mostly made of metal composite materials such as carbon steel, stainless steel and nonferrous metals (such as copper), and have excellent mechanical properties. With the increasingly wide application field of the nut, the nut is required to have certain properties of insulation, heat insulation, high weather resistance, corrosion resistance, light weight and the like, and the properties are difficult to realize by the conventional metal composite material nut. The fiber reinforced composite material is obtained by impregnating and curing fiber-fabric and impregnating resin, has excellent insulating property, heat insulating property, weather resistance and corrosion resistance, and is a preferred material for preparing light nuts. When the thickness of the nut is smaller, the nut can be manufactured by pressing to the thickness of the nut in a laminating mode, but with the increase of the use requirement, nuts with more sizes have more requirements, particularly the height of the nut is larger and larger, and when the height of the nut is larger than 50mm, the nut can not be economically realized in the laminating mode. The original fiber reinforced composite material nut is prepared by the following steps: firstly, a blank is manufactured in a fiber-fabric prepreg laminating mode, and a nut is manufactured in a machining mode; or the blank is made by adopting a fiber-fabric winding forming method, and then the nut is made by adopting a machining mode. In the two modes, the fiber-fabric direction is single, the layers of laminated and wound materials are the parts with the weakest binding force, and the nut is easy to crack along the interlayer direction when the nut is subjected to the external force of screw torsion, so that the whole nut is damaged and the working capacity is lost.
Therefore, the development of the fiber reinforced composite material nut with excellent overall mechanical properties is of great significance to the technical field.
Disclosure of Invention
The present invention has been made to solve the above-mentioned problems occurring in the prior art, and an object of the present invention is to provide a fiber-reinforced composite nut and a method for manufacturing the same, which have excellent overall mechanical properties, and which have insulation, heat insulation, high weather resistance, corrosion resistance, and light weight, compared to nuts made of metal composites.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a fibre-reinforced composite nut comprising an inner core and a composite winding wound around the outside of the inner core, the inner core being press-formed from one or more overlapping layers of fibre-fabric prepreg material, the composite winding being obtained from one or more overlapping layers of continuous fibre prepreg material or fibre-fabric prepreg material which has been cured.
Preferably, the fiber-fabric prepreg is obtained by impregnating and baking a fiber-fabric and an impregnating adhesive to form a semi-cured product on the fiber-fabric; the continuous fiber prepreg is obtained by impregnating and baking continuous fibers and an impregnating adhesive to form a semi-cured product on the continuous fibers by the impregnating adhesive.
More preferably, the impregnation adhesive comprises unsaturated polyester, phenolic adhesive, diphenyl ether adhesive, polyimide adhesive, polyamine imide adhesive, amino resin adhesive or epoxy resin adhesive.
More preferably, the fiber-fabric prepreg comprises 30 to 50% by weight of a semi-cured product and 50 to 70% by weight of a fiber-fabric; the continuous fiber prepreg comprises 30-50 wt% of semi-cured material and 50-70 wt% of continuous fiber.
More preferably, the fiber-woven fabric comprises one or a mixture of two or more of fiber filaments, fiber chopped strand mats, fiber stitch-bonded mats, fiber surface mats, fiber continuous mats and fiber composite mats, and the fibers adopted by the continuous fibers and/or the fiber-woven fabric comprise one or a mixture of two or more of glass fibers, basalt fibers, polyester fibers, aramid fibers and carbon fibers.
In the fiber-reinforced composite material nut described above, preferably, the inner diameter wall of the fiber-reinforced composite material nut is provided with a thread, the lamination direction of the inner core material is perpendicular to the thread direction, and the composite wound layer is wound around the outer side wall of the inner core material along the thread direction.
Based on a general inventive concept, the present invention further provides a method for preparing the fiber reinforced composite material nut, comprising the following steps:
(1) preparing a fiber-fabric prepreg and/or a continuous fiber prepreg;
(2) cutting the fiber-fabric prepreg material, putting the cut fiber-fabric prepreg material into a mould for hot press molding, then demoulding to obtain a flat plate blank, cutting the flat plate blank to obtain an internal core material,
(3) and (3) winding the continuous fiber prepreg or the fiber-fabric prepreg obtained in the step (1) to the outside of the inner core material obtained in the step (2), heating, curing and machining to obtain the fiber reinforced composite material nut.
The above preparation method, preferably, in the step (1), the fiber-fabric prepreg is prepared by: soaking the fiber-fabric in an impregnating adhesive, and heating and baking the fiber-fabric after the fiber-fabric is fully soaked to form a semi-cured product on the fiber-fabric by the impregnating adhesive; the continuous fiber prepreg is prepared by the following method: and (2) soaking the continuous fibers in the soaking adhesive, and heating and baking the continuous fibers after the continuous fibers are fully soaked so that the soaking adhesive forms a semi-cured product on the continuous fibers.
Preferably, in the step (2), the temperature of the hot press molding is controlled to be ± 30% of the curing temperature of the semi-cured product contained in the fiber-fabric prepreg, and the pressure of the hot press molding is controlled to be 4MPa to 50 MPa; the lamination direction of the inner core material is perpendicular to the thread direction, and the diameter of the inner core material is larger than the diameter of the inner thread of the nut to be processed.
Preferably, in the step (3), the winding tension is controlled to be not more than 80% of the breaking strength of the adopted fiber and fiber-fabric during winding, and the winding speed is not more than 200 m/min; the winding method is dry winding or wet winding, the winding temperature is controlled to be +/-30% of the curing temperature of semi-cured substances contained in the fiber-fabric prepreg and the continuous fiber prepreg when the dry winding is adopted, and the winding temperature is controlled to be normal temperature when the wet winding is adopted; the specific operation of heating and curing comprises the following steps: and heating to +/-30% of the curing temperature of the semi-cured substance contained in the fiber-fabric prepreg and/or the continuous fiber prepreg, and cooling to room temperature after heat preservation for 2-5 h.
Compared with the prior art, the invention has the beneficial effects that:
1. the fiber reinforced composite material nut consists of an inner core material and a composite winding layer wound outside the inner core material, wherein the inner core material is formed in a laminating mode, the overall mechanical property is excellent, and compared with a nut made of a metal composite material, the fiber reinforced composite material nut has the characteristics of insulation, heat insulation, high weather resistance, corrosion resistance, light weight and the like.
2. According to the preparation method, the inner core material is prepared in a laminating mode, the longitudinal tension can be improved, then the composite winding layer is wound outside the inner core material in a winding forming mode to prepare the nut blank, the transverse mechanical property can be improved, so that the transverse and longitudinal reinforcement is achieved, finally the nut is prepared in a machining mode, the preparation method is simple and easy to operate, the cost is low, and the transverse and longitudinal mechanical properties of the prepared fiber reinforced composite material nut can be enhanced.
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 introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a front view of a fiber reinforced composite nut of the present invention;
FIG. 2 is a side view of a fiber reinforced composite nut of the present invention;
illustration of the drawings: 1. an inner core material; 2. and (4) compounding winding layers.
Detailed Description
In order to facilitate understanding of the invention, the invention will be described more fully and in detail with reference to the accompanying drawings and preferred embodiments, but the scope of the invention is not limited to the specific embodiments below.
Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention.
Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by existing methods.
The laminate molding method of the present invention is a molding method in which a plurality of layers of the same or different materials are integrally combined under heat and pressure. Various laminated products are obtained by laminating reinforcing materials such as paper, fabric, glass cloth, specialty fibers, etc. impregnated with thermosetting resin, and heating and pressing the laminate.
The winding forming process includes winding continuous fiber soaked with resin glue solution onto core mold according to certain rule, curing, demolding and machining to obtain the product.
Example 1:
the specification of the fiber reinforced composite material nut is the outer diameter
m30, height 100mm, structure as shown in figure 1-2, comprising inner core 1 and composite winding layer 2 wound outside inner core 1, wherein inner core 1 is formed by pressing 254 layers of overlapped glass plain cloth prepreg, and the unit area mass is 203g/m2The thickness is 0.18mm, the tensile breaking strength warp direction is 69kg/inch, and the tensile breaking strength weft direction is 43 kg/inch; the composite winding layer 2 is obtained by heating and curing 265 layers of overlapped continuous glass plain cloth prepreg material, and the unit area mass is 100g/m2The thickness is 0.1mm, the tensile breaking strength warp direction is 49kg/inch, and the tensile breaking strength weft direction is 46 kg/inch.
Wherein, the weight percentage of the semi-cured material (epoxy resin semi-cured material) contained in the glass plain cloth prepreg is 33 percent, and the weight percentage of the glass plain cloth contained in the glass plain cloth prepreg is 67 percent; the continuous glass scrim prepreg contained therein had a semi-cured product (epoxy semi-cured product) content of 35% by weight and a continuous glass scrim content of 65% by weight.
The preparation method of the fiber reinforced composite material nut of the embodiment comprises the following steps:
(1) dipping the glass plain cloth in an epoxy resin adhesive, heating and baking after the glass plain cloth is fully dipped, so that the epoxy resin adhesive forms a semi-cured substance on the glass plain cloth, and obtaining a glass plain cloth prepreg material;
dipping the continuous glass plain cloth in an epoxy resin adhesive, heating and baking after the continuous glass plain cloth is fully dipped, so that the epoxy resin adhesive forms a semi-cured object on the continuous glass plain cloth, and obtaining a continuous glass plain cloth prepreg material;
(2) cutting 254 layers of glass plain cloth prepreg, placing the cut materials into a mould, carrying out hot press molding at 160 ℃ and 15MPa, wherein the laminating direction is vertical to the thread direction, then demoulding to obtain a flat plate blank with the thickness of 34mm, cutting the flat plate blank to obtain an internal core material with the diameter of 33mm, wherein the diameter of the internal core material is larger than the diameter of the internal thread of the nut to be processed;
(3) and heating the continuous glass plain cloth prepreg to 140 ℃ by adopting a dry winding mode, overlapping 265 layers to wind the inner core material, wherein the winding tension is 40kg/inch, the winding speed is 100m/min, heating to 165 ℃, then preserving heat for 2 hours, curing, and mechanically processing to obtain the fiber reinforced composite nut of the embodiment.
After the performance test, the performance data of the fiber reinforced composite material nut prepared by the method is shown in table 1.
Table 1: performance test results of the fiber reinforced composite nut of example 1
Example 2:
the specification of the fiber reinforced composite material nut is the outer diameter
m42, height 140mm, structure as shown in figure 1-2, comprising inner core 1 and composite winding layer 2 wound outside inner core 1, wherein inner core 1 is formed by pressing 385 layers of overlapped glass plain cloth prepreg, and the unit area mass is 203g/m2The thickness is 0.18mm, the tensile breaking strength warp direction is 69kg/inch, and the tensile breaking strength weft direction is 43 kg/inch; the composite winding layer 2 is obtained by impregnating 2400tex continuous glass fiber yarns with epoxy resin and heating and curing, and the continuous glass fiber yarns have the density of 2400tex, the tensile strength of 2200MPa and the shear strength of 80 MPa.
Wherein, the weight percentage of the semi-cured material (epoxy resin semi-cured material) contained in the glass plain cloth prepreg is 33 percent, and the weight percentage of the glass plain cloth contained in the glass plain cloth prepreg is 67 percent; after the continuous glass fiber yarns are impregnated with the epoxy resin and cured, the weight percentage of the epoxy resin is 37 percent, and the weight percentage of the continuous glass fiber yarns is 63 percent.
The preparation method of the fiber reinforced composite material nut of the embodiment comprises the following steps:
(1) dipping the glass plain cloth in an epoxy resin adhesive, heating and baking after the glass plain cloth is fully dipped, so that the epoxy resin adhesive forms a semi-cured substance on the glass plain cloth, and obtaining a glass plain cloth prepreg material;
soaking continuous glass fiber yarns in an epoxy resin adhesive, heating and baking after the continuous glass fiber yarns are fully soaked, so that the epoxy resin adhesive forms a semi-cured product on the continuous glass fiber yarns, and obtaining a continuous glass fiber yarn preimpregnated material;
(2) cutting the glass plain cloth prepreg material into 385 layers, then placing the cut glass plain cloth prepreg material into a mould, carrying out hot press molding at 160 ℃ and 15MPa, wherein the laminating direction is vertical to the thread direction, then demoulding to obtain a flat plate blank with the thickness of 55mm, cutting the flat plate blank to obtain an inner core material with the diameter of 53mm, wherein the diameter of the inner core material is larger than the diameter of the inner thread of the nut to be processed;
(3) and (3) overlapping and winding continuous glass fiber yarns at 45 degrees on the inner core material by adopting a wet winding mode, wherein the winding tension is 20N, the winding speed is 50m/min, the winding diameter is 73mm, heating to 100 ℃, preserving heat for 4h for curing, and machining to obtain the fiber reinforced composite material nut of the embodiment.
After the performance test, the performance data of the fiber reinforced composite material nut prepared by the method is shown in table 2.
Table 2: performance test results of the fiber reinforced composite nut of example 2
Example 3:
a fiber of the present inventionNut of reinforced composite material with external diameter
m24, height 70mm, structure as shown in figure 1-2, comprising inner core 1 and composite winding layer 2 wound outside inner core 1, wherein inner core 1 is formed by 230 layers of overlapped glass plain cloth prepreg, and the unit area mass is 203g/m2The thickness is 0.18mm, the tensile breaking strength warp direction is 69kg/inch, and the tensile breaking strength weft direction is 43 kg/inch; the composite winding layer 2 is obtained by impregnating 2400tex continuous glass fiber yarns with epoxy resin and heating and curing, and the continuous glass fiber yarns have the density of 2400tex, the tensile strength of 2200MPa and the shear strength of 80 MPa.
Wherein, the weight percentage of the semi-cured substance (diphenyl ether semi-cured substance) contained in the glass plain cloth prepreg is 33 percent, and the weight percentage of the glass plain cloth contained in the glass plain cloth prepreg is 67 percent; after the continuous glass fiber yarns are impregnated with the epoxy resin and cured, the weight percentage of the epoxy resin is 37 percent, and the weight percentage of the continuous glass fiber yarns is 63 percent.
The preparation method of the fiber reinforced composite material nut of the embodiment comprises the following steps:
(1) dipping the glass plain cloth in a diphenyl ether adhesive, heating and baking after the glass plain cloth is fully dipped, so that the diphenyl ether adhesive forms a semi-cured object on the glass plain cloth, and obtaining a glass plain cloth prepreg material;
soaking continuous glass fiber yarns in an epoxy resin adhesive, heating and baking after the continuous glass fiber yarns are fully soaked, so that the epoxy resin adhesive forms a semi-cured product on the continuous glass fiber yarns, and obtaining a continuous glass fiber yarn preimpregnated material;
(2) cutting 230 layers of glass plain cloth prepreg, placing the glass plain cloth prepreg into a mould, carrying out hot press molding at 185 ℃ and 7MPa, wherein the laminating direction is vertical to the thread direction, then demoulding to obtain a flat plate blank with the thickness of 55mm, cutting the flat plate blank to obtain an inner core material with the diameter of 53mm, wherein the diameter of the inner core material is larger than the diameter of the inner thread of the nut to be processed;
(3) and (3) overlapping and winding continuous glass fiber yarns at 45 degrees on the inner core material by adopting a wet winding mode, wherein the winding tension is 20N, the winding speed is 50m/min, the winding diameter is 73mm, heating to 100 ℃, preserving heat for 4h for curing, and machining to obtain the fiber reinforced composite material nut of the embodiment.
After the performance test, the performance data of the fiber reinforced composite material nut prepared by the method is shown in table 3.
Table 3: performance test results of the fiber reinforced composite nut of example 3
Comparative example 1:
a fiber reinforced composite material nut is provided with an outer diameter
m30, h100mm, which is formed by pressing glass plain cloth preimpregnated material, and the preparation method comprises the following steps:
(1) the mass per unit area of the glass plain cloth is 203g/m2The thickness is 0.18mm, the tensile breaking strength warp direction is 69kg/inch, and the tensile breaking strength weft direction is 43 kg/inch; dipping the glass plain cloth in an epoxy resin adhesive, heating and baking the glass plain cloth after the glass plain cloth is fully dipped, so that the epoxy resin adhesive forms a semi-cured substance on the glass plain cloth, and obtaining the glass plain cloth prepreg;
(2) cutting the glass plain cloth prepreg material into 370 layers, putting the materials into a mould, carrying out hot press molding at 160 ℃ and 15MPa, wherein the laminating direction is vertical to the thread direction, then demoulding to obtain a flat plate blank, and carrying out mechanical processing to obtain the fiber reinforced composite material nut of the comparative example.
After the performance test, the performance data is shown in table 4:
table 4: performance test results of the fiber reinforced composite nut of comparative example 1
Comparative example 2:
a fiber reinforced composite material nut is provided with an outer diameter
m42 and h140mm, which are formed by winding glass plain cloth preimpregnated material, and the preparation method comprises the following steps:
(1) the mass per unit area of the glass plain cloth is 100g/m2The thickness of the prepreg is 0.1mm, the tensile breaking strength warp direction is 49kg/inch, the tensile breaking strength weft direction is 46kg/inch, the prepreg is soaked in epoxy resin adhesive, and after the epoxy resin adhesive is fully soaked, the prepreg is heated and baked, so that the epoxy resin adhesive forms a semi-cured object on the glass plain cloth, and the glass plain cloth prepreg is obtained;
(2) and overlapping and winding the glass plain cloth prepreg material for forming, wherein the winding tension is 40kg/inch, the winding speed is 100m/min, the diameter is 72mm after winding, heating to 110 ℃, preserving heat for 4h for curing, and mechanically processing to obtain the fiber reinforced composite material nut of the comparative example.
After the performance test, the performance data is shown in table 5:
table 5: performance test results of the fiber reinforced composite nut of comparative example 2
In general, the fiber reinforced composite material nut prepared by the invention is composed of an inner core material and a composite winding layer wound outside the inner core material, the inner core material is formed in a laminating mode, the cost is low, the transverse and longitudinal mechanical properties of the prepared fiber reinforced composite material nut can be enhanced, and the fiber reinforced composite material nut has the characteristics of insulation, heat insulation, high weather resistance, corrosion resistance, light weight and the like.
Claims (10)
1. A fibre-reinforced composite nut, characterised by comprising an inner core (1) and a composite winding (2) wound around the outside of the inner core (1), the inner core (1) being press-formed from one or more overlapping layers of fibre-fabric prepreg material, the composite winding (2) being obtained from one or more overlapping layers of continuous fibre prepreg material or fibre-fabric prepreg material after curing.
2. The fiber reinforced composite nut of claim 1, wherein the fiber-fabric prepreg is obtained by impregnating and baking a fiber-fabric and an impregnating adhesive to form a semi-cured product on the fiber-fabric; the continuous fiber prepreg is obtained by impregnating and baking continuous fibers and an impregnating adhesive to form a semi-cured product on the continuous fibers by the impregnating adhesive.
3. The fiber-reinforced composite nut of claim 2, wherein the impregnating adhesive comprises an unsaturated polyester, a phenolic adhesive, a diphenyl ether adhesive, a polyimide adhesive, a polyamideimide adhesive, an amino resin adhesive, or an epoxy resin adhesive.
4. The fiber-reinforced composite nut according to claim 2, wherein the fiber-fabric prepreg comprises 30 to 50% by weight of a semi-cured material and 50 to 70% by weight of a fiber-fabric; the continuous fiber prepreg comprises 30-50 wt% of semi-cured material and 50-70 wt% of continuous fiber.
5. The fiber reinforced composite nut of claim 2, wherein the fiber-fabric comprises one or a mixture of two or more of fiber filaments, fiber chopped strand mat, fiber stitch-bonded mat, fiber surfacing mat, fiber continuous mat, and fiber composite mat, and the fibers used for the continuous fibers and/or fiber-fabric comprise one or a mixture of two or more of glass fibers, basalt fibers, polyester fibers, aramid fibers, and carbon fibers.
6. The fiber-reinforced composite nut according to any one of claims 1 to 5, wherein the inner diameter wall of the fiber-reinforced composite nut is provided with a thread, the lamination direction of the inner core (1) is perpendicular to the thread direction, and the composite wound layer (2) is wound on the outer sidewall of the inner core (1) along the thread direction.
7. The preparation method of the fiber reinforced composite material nut is characterized by comprising the following steps of:
(1) preparing a fiber-fabric prepreg and/or a continuous fiber prepreg;
(2) cutting the fiber-fabric prepreg material, putting the cut fiber-fabric prepreg material into a mould for hot press molding, then demoulding to obtain a flat plate blank, cutting the flat plate blank to obtain an internal core material,
(3) and (3) winding the continuous fiber prepreg or the fiber-fabric prepreg obtained in the step (1) to the outside of the inner core material obtained in the step (2), heating, curing and machining to obtain the fiber reinforced composite material nut.
8. The method of claim 7, wherein in the step (1), the fiber-fabric prepreg is prepared by: soaking the fiber-fabric in an impregnating adhesive, and heating and baking the fiber-fabric after the fiber-fabric is fully soaked to form a semi-cured product on the fiber-fabric by the impregnating adhesive; the continuous fiber prepreg is prepared by the following method: and (2) soaking the continuous fibers in the soaking adhesive, and heating and baking the continuous fibers after the continuous fibers are fully soaked so that the soaking adhesive forms a semi-cured product on the continuous fibers.
9. The production method according to claim 7, wherein in the step (2), the temperature of the hot press molding is controlled to ± 30% of the curing temperature of the semi-cured product contained in the fiber-fabric prepreg, and the pressure of the hot press molding is controlled to 4MPa to 50 MPa; the lamination direction of the inner core material is perpendicular to the thread direction, and the diameter of the inner core material is larger than the diameter of the inner thread of the nut to be processed.
10. The production method according to any one of claims 7 to 9, wherein in the step (3), the winding tension is controlled at the time of winding not more than 80% of the breaking strength of the fiber, fiber-fabric used, and the speed of winding is not more than 200 m/min; the winding method is dry winding or wet winding, the winding temperature is controlled to be +/-30% of the curing temperature of semi-cured substances contained in the fiber-fabric prepreg and the continuous fiber prepreg when the dry winding is adopted, and the winding temperature is controlled to be normal temperature when the wet winding is adopted; the specific operation of heating and curing comprises the following steps: and heating to +/-30% of the curing temperature of the semi-cured substance contained in the fiber-fabric prepreg and/or the continuous fiber prepreg, and cooling to room temperature after heat preservation for 2-5 h.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010005746.7A CN111169038A (en) | 2020-01-03 | 2020-01-03 | Fiber reinforced composite material nut and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010005746.7A CN111169038A (en) | 2020-01-03 | 2020-01-03 | Fiber reinforced composite material nut and preparation method thereof |
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| CN111169038A true CN111169038A (en) | 2020-05-19 |
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| CN202010005746.7A Pending CN111169038A (en) | 2020-01-03 | 2020-01-03 | Fiber reinforced composite material nut and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112339355A (en) * | 2020-09-30 | 2021-02-09 | 山东中航和辉复合材料有限公司 | Thermoplastic composite nut and preparation method and application thereof |
| CN114195536A (en) * | 2021-12-06 | 2022-03-18 | 胡海峰 | Method for enhancing performance between composite layers |
| RU214781U1 (en) * | 2022-08-29 | 2022-11-14 | Владимир Васильевич Галайко | Composite nut |
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| CN114195536A (en) * | 2021-12-06 | 2022-03-18 | 胡海峰 | Method for enhancing performance between composite layers |
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| RU222079U1 (en) * | 2023-09-28 | 2023-12-11 | Владимир Васильевич Галайко | Carbon Composite Nut |
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Application publication date: 20200519 |