CN113211904A - Corrugated reinforced metal/fiber mixed structure plate and preparation method thereof - Google Patents
Corrugated reinforced metal/fiber mixed structure plate and preparation method thereof Download PDFInfo
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- CN113211904A CN113211904A CN202110476383.XA CN202110476383A CN113211904A CN 113211904 A CN113211904 A CN 113211904A CN 202110476383 A CN202110476383 A CN 202110476383A CN 113211904 A CN113211904 A CN 113211904A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/18—Layered products comprising a layer of metal comprising iron or steel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/043—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of metal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
- B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
- B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
- B32B3/18—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by an internal layer formed of separate pieces of material which are juxtaposed side-by-side
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/10—Inorganic fibres
- B32B2262/106—Carbon fibres, e.g. graphite fibres
Abstract
The invention discloses a corrugated reinforced metal/fiber mixed structure plate and a preparation method thereof, wherein the corrugated reinforced metal/fiber mixed structure plate comprises an upper outer plate, a fiber core layer, a plurality of corrugated rib plates and a lower outer plate; the upper outer plate and the lower outer plate are arranged in parallel at intervals, and the plurality of corrugated rib plates are arranged between the upper outer plate and the lower outer plate in parallel; a fiber filling area is formed between the adjacent corrugated rib plates, and the fiber core layer is filled in the fiber filling area; the fiber filaments in the fiber core layer are uniformly distributed in the same preset direction; according to the invention, a fiber filling area is formed between the upper outer plate and the lower outer plate by utilizing the corrugated rib plate; by filling the fiber core layer, the fiber core layer has low density and high strength, and the mass of the plate is effectively reduced; the tensile modulus of the fiber filaments along the length direction is highest, and the adjustment and control of the mechanical properties of different areas of the plate are realized by controlling the orientation arrangement of the fiber filaments; the fiber resin mixed liquid is injected into the fiber filling area in the manufacturing process, a mold does not need to be manufactured and disassembled, one-time molding is realized, and the manufacturing process is simple.
Description
Technical Field
The invention belongs to the technical field of mixed structure plates, and particularly relates to a corrugated reinforced metal/fiber mixed structure plate and a preparation method thereof.
Background
The mixed structure plate has the characteristics of strong designability and the like, and is widely applied to various mechanical manufacturing fields; the plate can be directly used as a key part of mechanical equipment, and can be processed into a beam and other key loaded parts of the mechanical equipment. The sheet material is the basis of the mechanical processing section bar, and the performance of the sheet material influences the performance of mechanical equipment parts; therefore, it is important to improve the basic performance of the board. Most of the existing mixed structure plates are metal/foam mixed, metal/rubber mixed and metal/composite material mixed, most of the mixed structure plates mainly fill light materials into a metal hollow structure, and therefore the purposes of reducing weight and reducing cost are achieved, but the structural strength and rigidity are reduced to some extent.
At present, there are documents which internally adopt a reinforcing structure to improve the mechanical properties of a hybrid structure, such as a patent application (publication number: US006979180B2) on a hollow blade, and internally adopt a reinforcing stringer structure, and use diffusion welding and superplastic forming techniques to achieve the purposes of strength enhancement and weight reduction; the Chinese patent application: a fan blade (with the publication number of CN101649844A) based on a hollow structure metal/composite material framework adopts a space discrete rib structure formed by the hollow structure metal/composite material framework to fill the hollow structure, and improves the specific strength and rigidity of a mixed structure by controlling the space distribution and the shape and position of the ribs in the structure; however, although the mass of the hybrid structure is reduced and the purpose of light weight is achieved, the strength and rigidity of the hybrid structure are still not comparable to those of a pure metal structure, and even the hybrid structure cannot meet the requirements of mechanical work sometimes.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a corrugated reinforced metal/fiber mixed structure plate and a preparation method thereof, aiming at solving the problems that the existing mixed structure plate mostly adopts a method of filling a metal hollow structure with a light material, the strength and the rigidity of the existing mixed structure plate are seriously weakened, and the existing mixed structure plate cannot meet the mechanical working requirement.
In order to achieve the purpose, the invention adopts the technical scheme that:
the invention provides a corrugated reinforced metal/fiber mixed structure plate which comprises an upper outer plate, a fiber core layer, a plurality of corrugated rib plates and a lower outer plate, wherein the upper outer plate is provided with a plurality of corrugated rib plates; the upper outer plate and the lower outer plate are arranged in parallel at intervals, and the plurality of corrugated rib plates are arranged between the upper outer plate and the lower outer plate in parallel; a fiber filling area is formed between the adjacent corrugated rib plates, and the fiber core layer is filled in the fiber filling area; wherein, the fiber filaments in the fiber core layer are uniformly distributed according to the same preset direction.
Furthermore, the corrugated rib plates adopt semicircular corrugated rib plates; one end of the corrugated rib plate is welded and fixed with the lower outer plate, and the other end of the corrugated rib plate is bonded and fixed with the upper outer plate.
Furthermore, the fiber core layer is a carbon fiber core layer, and the included angle between the fiber in the carbon fiber core layer and the length direction of the upper outer plate or the lower outer plate is 0-90 degrees.
Furthermore, the upper outer plate and the lower outer plate are both made of structural steel; the corrugated rib plate is formed by bending structural steel.
Furthermore, the height of the corrugated rib plates is the same as the thickness of the fiber core layer, and the corrugated rib plates are 3/5 of the thickness of the mixed structure plate.
The invention also provides a manufacturing method of the corrugated reinforced metal/fiber mixed structure plate, which comprises the following steps:
Further, the preparation process of the fiber resin mixed solution is as follows:
shearing the cellosilk raw material to obtain isometric cellosilks with preset sizes;
under the action of inert gas, introducing the equal-length fiber yarns with preset sizes into the conductive liquid to obtain the fiber yarns wrapping the conductive liquid;
and mixing the fiber filaments wrapped with the conductive liquid with resin to obtain the fiber-resin mixed solution.
Further, the raw fiber material is sheared by fiber cutting equipment.
Further, a two-degree-of-freedom magnetic field generating device is adopted to exert a magnetic field effect on the metal cavity injected with the fiber resin mixed liquid; the two-degree-of-freedom magnetic field generating device comprises an outer support, an inner support hinge, an outer support hinge, a first electromagnetic generator and a second electromagnetic generator;
outer support hinges are symmetrically arranged at two ends of the outer support in the vertical direction, and the outer support can horizontally rotate along a connecting line of the two outer support hinges; the two ends of the outer support in the horizontal direction are symmetrically provided with inner support hinges, the two horizontal ends of the inner support are connected with the outer support through the inner support hinges, and the inner support can vertically turn over along a connecting line of the two inner support hinges; the first electromagnetic generator is arranged at the upper end of the inner support, the second electromagnetic generator is arranged at the bottom end of the inner support, and magnetic poles generated by the first electromagnetic generator and the second electromagnetic generator are different; the metal cavity injected with the fiber resin mixed liquid is horizontally arranged in the inner bracket.
Furthermore, in the fiber resin mixed solution, the volume fraction of the equal-length fiber yarns wrapping the conductive liquid is 0.5-3%; the conductive liquid adopts graphite-based conductive adhesive.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a corrugated reinforced metal/fiber mixed structure plate and a manufacturing method thereof.A fiber filling area is formed between an upper outer plate and a lower outer plate by utilizing corrugated rib plates which are uniformly distributed between the upper outer plate and the lower outer plate; by filling the fiber core layer in the fiber filling area, the fiber core layer has the characteristics of low density and high strength, and the weight of the plate is effectively reduced on the premise of ensuring that the strength and the rigidity of the structural plate are not reduced; the tensile modulus of the fiber yarns along the length direction of the fiber yarns is highest, the fiber yarns in the fiber core layer are uniformly distributed according to the same preset direction, and the regulation and control of the mechanical properties of different areas of the plate are realized by controlling the orientation distribution of the fiber yarns; the fiber resin mixed liquid is injected into the fiber filling area in the manufacturing process, the orientation and arrangement of the fiber filaments are adjusted by applying a magnetic field, a mold is not required to be manufactured and disassembled, one-time molding is realized, and the manufacturing process is simple.
Furthermore, the corrugated rib plate adopts a semicircular corrugated rib plate, so that the geometric mutation of the rib plate is eliminated, the damage caused by stress concentration at the edges and corners of the rib plate is weakened, and the buckling resistance of the rib plate structure is effectively improved; meanwhile, smooth flowing of fiber resin mixed liquid in a fiber filling area is ensured in the preparation process, molding of the fiber core layer is facilitated, and the phenomenon that rich grease, poor grease or fiber cutting occurs at the corners of the fiber core layer in the preparation process is avoided.
Furthermore, isometric fiber yarns are added into the conductive liquid, the conductive liquid is wrapped on the surfaces of the fiber yarns, so that the fiber yarns in the fiber resin mixed liquid can be conveniently controlled by utilizing a magnetic field, and the fiber yarns are ensured to be uniformly distributed in the fiber core layer.
Further, a two-degree-of-freedom magnetic field generating device is adopted to exert a magnetic field effect on the metal cavity injected with the fiber resin mixed liquid, the direction of the applied magnetic field is adjusted by adjusting the rotation of the inner support and the outer support, and further the orientation regulation in the space of the fiber filaments in the fiber core layer is realized; the arrangement regulation and control of the spatial distribution of the fiber systems in the fiber core layer are realized by adjusting the first electromagnetic generator and the second electromagnetic generator and controlling the size of the magnetic field.
Furthermore, the conductive liquid graphite-based conductive adhesive has the advantages that the conductive liquid and the resin are mutually incompatible, and the effectiveness of regulating the orientation and arrangement of the fiber yarns by the magnetic field is ensured.
Drawings
FIG. 1 is a schematic view of the overall structure of a hybrid structural panel in an embodiment;
FIG. 2 is a schematic cross-sectional view of a hybrid structural plate in an example;
FIG. 3 is a schematic view of an internal structure in the hybrid structural panel in the embodiment;
FIG. 4 is a schematic structural view of corrugated webs in the hybrid structural panel in the example;
FIG. 5 is a schematic view of the structure of the fiber core layer in the hybrid structural panel in the example;
FIG. 6 is a schematic view of the orientation of magnetic field control filaments in the hybrid structural panel in the example;
FIG. 7 is a schematic structural view of a fiber-filled region in the hybrid structural panel in the example;
FIG. 8 is a schematic view showing a flow of manufacturing a hybrid structural sheet in an example;
fig. 9 is a schematic structural diagram of a two-degree-of-freedom magnetic field generating device in the embodiment.
Wherein, 1, an upper outer plate, 2 fiber core layers, 3 corrugated rib plates, 4 lower outer plates, 5 magnetic field generating devices and 6 injection shunt pipes; 501 outer support, 502 inner support, 503 inner support hinge, 504 outer support hinge, 505 first electromagnetic generator, 506 second electromagnetic generator.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects of the present invention more apparent, the following embodiments further describe the present invention in detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention provides a corrugated reinforced metal/fiber mixed structure plate, which comprises an upper outer plate 1, a fiber core layer 2, a plurality of corrugated rib plates 3 and a lower outer plate 4; the upper outer plate 1 and the lower outer plate 4 are arranged in parallel at intervals, and the plurality of corrugated rib plates 3 are arranged between the upper outer plate 1 and the lower outer plate 4 in parallel; a fiber filling area is formed between the adjacent corrugated rib plates 3, and the fiber core layer 2 is filled in the fiber filling area; the fiber yarns in the fiber core layer 2 are uniformly distributed between the upper outer plate 1 and the lower outer plate 4, the fiber yarns in the fiber core layer 2 are uniformly distributed in the same preset direction, and all the fiber yarns have the same orientation.
In the invention, the upper outer plate 1 and the lower outer plate 4 are both made of structural steel, and the corrugated rib plate 3 is formed by bending the structural steel; the structural steel has a density of 7850kg/m3The fiber core layer 2 is a carbon fiber core layer; preferably, a corrugated rib plate of a box body with the length equal to that of the structural plate is additionally welded along the length direction of the structural plate to serve as a reinforcing plate, and the reinforcing plate is orthogonal to the corrugated rib plate 3; the corrugated rib plates 3 are arranged in parallel, one ends of the corrugated rib plates 3 are welded and fixed with the lower outer plate 4, and the other ends of the corrugated rib plates 3 are bonded and fixed with the upper outer plate; preferably, the corrugated rib plate 3 is a semicircular corrugated rib plate.
According to the corrugated reinforced metal/fiber mixed structure plate, the thickness dimension of the mixed structure plate is manufactured according to the plate thickness required by the market, and the corrugated reinforced metal/fiber mixed structure plate is formed by bonding an upper outer plate 1, a fiber core layer 2, a corrugated rib plate 3 and a lower outer plate 4; the thickness of the corrugated rib plates 3 is 1/2 of the thickness of the upper outer plate 1 or the lower outer plate 4, the height of the corrugated rib plates 3 is 3/5 of the thickness of the mixed structure plate, and all the corrugated rib plates 3 are parallel to each other; the thickness of the fiber core layer 2 is 3/5 of the thickness of the mixed structure plate, and the fiber core layer is arranged in a corrugated strip shape.
The invention also provides a manufacturing method of the corrugated reinforced metal/fiber mixed structure plate, which comprises the following steps:
And 2, uniformly fixing the corrugated rib plates 3 between the upper outer plate 1 and the lower outer plate 4, and forming a plurality of fiber filling areas between the upper outer plate 1 and the lower outer plate 4 to obtain the metal cavity.
step 31, shearing the cellosilk raw material by using fiber cutting equipment to obtain isometric cellosilks with preset sizes; wherein the raw material of the fiber yarn is carbon fiber.
Step 32, under the action of high-pressure inert gas, introducing the equal-length fiber yarns with preset sizes into the conductive liquid to obtain the fiber yarns wrapping the conductive liquid; wherein the conductive liquid adopts graphite-based conductive adhesive; preferably, the graphite-based conductive adhesive is JHE-01.
And step 33, putting the conductive liquid-coated fiber filaments and the resin into a mixing tank according to the proportion that the volume fraction of the conductive liquid-coated fiber filaments is 0.5-3% for mixing to obtain the fiber resin mixed solution.
In the invention, the two-degree-of-freedom magnetic field generating device 5 comprises an outer support 501, an inner support 502, an inner support hinge 503, an outer support hinge 504, a first electromagnetic generator 505 and a second electromagnetic generator 506; outer support hinges 504 are symmetrically arranged at two ends of the outer support 501 in the vertical direction, and the outer support 501 can horizontally rotate along a connecting line of the two outer support hinges 501; inner support hinges 503 are symmetrically arranged at two ends of the outer support 501 in the horizontal direction, two horizontal ends of the inner support 502 are connected with the outer support 501 through the inner support hinges 503, and the inner support 502 can vertically turn over along a connecting line of the two inner support hinges 503; a first electromagnetic generator 505 is arranged at the upper end of the inner bracket 502, a second electromagnetic generator 506 is arranged at the bottom end of the inner bracket 502, and the magnetic poles generated by the first electromagnetic generator 505 and the second electromagnetic generator 506 are different; the metal cavity into which the fiber resin mixture is injected is horizontally disposed in the inner holder 502.
The manufacturing method of the mixed structure plate comprises the steps of introducing high-pressure inert gas into a fiber cutting device, and cutting a fiber raw material by using the fiber cutting device to obtain equal-length fibers with preset sizes; the equal-length fiber filaments enter the conductive liquid along with the high-pressure inert gas, so that the equal-length fiber filaments have conductivity; placing the fiber filaments wrapped with the conductive liquid and the resin in a mixing tank, stirring and mixing, and obtaining a fiber-resin mixed solution after the fibers wrapped with the conductive liquid and the resin are uniformly mixed; then, injecting the fiber resin mixed liquid into a fiber filling area, applying a magnetic field on the outer side of the metal cavity by adopting a two-degree-of-freedom magnetic field generating device, and controlling the magnetic field intensity and direction of the electromagnetic field according to the performance of the required structural plate so as to control the orientation arrangement of the fiber yarns; and curing and molding the fiber resin mixed solution to obtain a fiber core layer, and thus obtaining the corrugated reinforced metal/fiber mixed structure plate.
According to the corrugated reinforced metal/fiber mixed structure plate and the manufacturing method thereof, the fiber resin mixed liquid is injected into the fiber filling area of the metal cavity by a liquid state method, and one-step molding is realized without adopting a mold and removing the mold; the fiber resin mixed solution has a good bonding interface, and the mechanical property of the material is effectively improved; the corrugated rib plate and the lower outer plate are welded, all the other connecting modes are functional adhesives for bonding, the preparation process is simple, the operability is high, and the requirement of batch production is met.
The mixed structure plate has the advantages of low density and high specific strength; compared with the structure with the same size, the weight is reduced by half on the premise of ensuring that the strength and the rigidity are not reduced; the orientation arrangement of the fiber yarns is controlled by using a magnetic field, and the orientation arrangement of the fiber yarns with the same length can be optimized according to different working conditions; corrugated rib plate adopts semi-circular corrugated rib plate, and its design has eliminated the problem of gusset geometry sudden change, has weakened gusset edges and corners department stress concentration and the damage that leads to is sprouted, helps improving the anti bucking ability of gusset structure, can make short fiber resin mixed liquid flow smoothly at the metal die cavity in preparation process, is favorable to taking shape of fibre sandwich layer, and can avoid the phenomenon that rich fat lean fat and fibre cut off appear in carbon fibre sandwich layer in preparation process edges and corners department.
Examples
The following examples were conducted to produce a 50x3000 thick mixed structure plate having a thickness of 50 mm.
As shown in fig. 1-7, the embodiment provides a corrugated reinforced metal/fiber mixed structural plate, which includes an upper outer plate 1, a fiber core layer 2, a corrugated rib plate 3 and a lower outer plate 4; the upper outer plate 1 and the lower outer plate 4 are arranged in parallel at intervals, and the plurality of corrugated rib plates 3 are arranged between the upper outer plate 1 and the lower outer plate 4 in parallel; wherein, the lower end of the corrugated rib plate 3 is welded and fixed with the lower outer plate 4, and the upper end of the corrugated rib plate 3 is bonded and fixed with the upper outer plate 1; a fiber filling area is formed between the adjacent corrugated rib plates 3, and the fiber core layer 2 is filled in the fiber filling area; the fiber filaments in the fiber core layer 2 are arranged between the upper outer plate 1 and the lower outer plate 4, and all the fiber filaments are oriented in the same direction.
In the embodiment, the thicknesses of the upper outer plate 1 and the lower outer plate 4 are both 8 mm; the thickness of the corrugated rib plate 3 is 4m, and the height is 34 mm; the thickness of the fiber core layer 2 is 34mm, and the width of the fiber core layer 2 is the distance between two adjacent corrugated rib plates; the fiber core layer 2 is formed by liquid injection, and the orientation arrangement of fiber filaments is controlled by a two-degree-of-freedom magnetic field generating device; for example: the equal-length fiber yarns are controlled to be uniformly distributed by collision of a two-degree-of-freedom magnetic field, and the included angle between the fiber yarns and the length direction of the upper outer plate 1 or the lower outer plate 4 is 45 degrees.
The upper outer plate 1 and the lower outer plate 3 are used as the outer surfaces of the mixed structural plate, and after the mixed structural plate is used for manufacturing parts of mechanical equipment, the parts are used as the mounting surfaces and bearing loads of the mechanical equipment and are main contributors to the strength of the parts of the mechanical equipment; in this embodiment, the upper outer plate 1 and the lower outer plate 4 are cold-drawn from 1045 steel, and the density thereof is 7850kg/m3Elastic modulus of 2.05X 1011N/m2(ii) a The fiber core layer 2 is filled in a gap between the upper outer plate 1 and the lower outer plate 4 and is positioned between two adjacent corrugated rib plates 3; the upper surface and the lower surface of the fiber core layer 2 are respectively attached to the upper outer plate 1 and the lower outer plate 4, and the corrugated surfaces at the two sides are respectively attached to the corrugated rib plates 3; six tables of fiber core 2Of the faces, four surfaces are tightly attached to the metal surface; in the preparation process, a liquid injection method is adopted for one-step molding, and the orientation arrangement of the fiber filaments in the fiber core layer 2 is controlled by a two-degree-of-freedom magnetic field generating device 5; the corrugated rib plate 3 is formed by bending structural steel, is a semicircular corrugated rib plate and is arranged in parallel; preferably, a corrugated rib plate with the same length as the plate is additionally welded along the length direction of the plate and is orthogonal to the other corrugated rib plates.
As shown in fig. 8, the manufacturing method of the hybrid structural plate specifically comprises the following steps:
And 2, uniformly fixing the corrugated rib plates 3 between the upper outer plate 1 and the lower outer plate 4, and forming a plurality of fiber filling areas between the upper outer plate 1 and the lower outer plate 4 to obtain the metal cavity.
step 31, cutting the cellosilk by using fiber cutting equipment to obtain the cellosilk with equal length in a preset size; wherein the raw material of the fiber yarn is carbon fiber.
Step 32, under the action of high-pressure inert gas, introducing the equal-length fiber yarns with preset sizes into the conductive liquid to obtain the equal-length fiber yarns wrapping the conductive liquid; wherein the conductive liquid adopts JHE-01 type graphite-based conductive adhesive.
Step 33, putting the isometric fiber yarns wrapped with the conductive liquid and resin into a mixing tank according to the volume fraction of 0.5% -3% for mixing to obtain the fiber resin mixed solution; wherein, the resin is contained in the resin storage container, and the resin storage container is provided with an adjusting valve, and the volume of the added resin is controlled by the adjusting valve.
In the embodiment, one end of the injection shunt pipe 6 is connected with an outlet of the mixing tank filled with the fiber resin mixed solution, and the other end is output in a plurality of paths; wherein each output is connected to a corresponding fiber-filled region.
As shown in fig. 9, in the present embodiment, the two-degree-of-freedom magnetic field generating device 5 includes an outer support 501, an inner support 502, an inner support hinge 503, an outer support hinge 504, a first electromagnetic generator 505, and a second electromagnetic generator 506; outer support hinges 504 are symmetrically arranged at two ends of the outer support 501 in the vertical direction, and the outer support 501 can horizontally rotate along a connecting line of the two outer support hinges 501; inner support hinges 503 are symmetrically arranged at two ends of the outer support 501 in the horizontal direction, two horizontal ends of the inner support 502 are connected with the outer support 501 through the inner support hinges 503, and the inner support 502 can vertically turn over along a connecting line of the two inner support hinges 503; a first electromagnetic generator 505 is arranged at the upper end of the inner bracket 502, a second electromagnetic generator 506 is arranged at the bottom end of the inner bracket 502, and the magnetic poles generated by the first electromagnetic generator 505 and the second electromagnetic generator 506 are different; the metal cavity into which the fiber resin mixture is injected is horizontally disposed in the inner holder 502.
In this embodiment, the external frame hinge 504 is used to control the horizontal rotation of the external frame 501, i.e. to control the rotation of the magnetic field along the y-axis direction; the inner support hinge 504 is used for controlling the rotation of the inner support 502, namely controlling the rotation of the magnetic field along the x-axis; through the combination of the rotary motion of the outer bracket and the inner bracket, the difference of the magnetic field direction in space can be controlled, so as to control the orientation of the fiber filaments in the fiber core layer 2 in the space; the magnetic fields in the first electromagnetic generator 505 and the second electromagnetic generator 506 are generated by electricity, and the magnitude of the magnetic field can be controlled by controlling the magnitude of the current, that is, the arrangement of the short fibers in the carbon fiber core layer 2 in the space can be controlled.
In the embodiment, the fiber resin mixed solution is injected into the fiber filling area, and the fiber filaments are cured and formed after being controlled to be arranged and oriented by the two-degree-of-freedom electromagnetic field generating device 5; the magnetic field angle is adjusted to 45 °, and the orientation of the short fibers in the carbon fiber core layer 2 thus produced is changed, as shown in fig. 6.
Compared with a pure structure steel plate with the same size, the corrugated reinforced metal/fiber mixed structure plate and the preparation method thereof have the advantages that the mass is reduced by half, and the rigidity and the strength are obviously improved; the damping material has the advantages of low density, high specific strength, high specific modulus, further optimized performance, strong designability and the like, and has good damping performance; the preparation process adopts a liquid injection method for one-step molding, and the arrangement and orientation of the fiber filaments in the fiber core layer are controlled by a magnetic field, so that the fiber core layer can be used for key parts with higher requirements on strength, rigidity and damping performance, such as a column beam and the like of a high-speed machine tool. The invention can reduce the mass of the key parts of the mechanical equipment by half on the premise of ensuring that the strength and the rigidity are not reduced, and can optimize the performance of the parts by changing the size and the direction of the magnetic field in the preparation process.
The above-described embodiment is only one of the embodiments that can implement the technical solution of the present invention, and the scope of the present invention is not limited by the embodiment, but includes any variations, substitutions and other embodiments that can be easily conceived by those skilled in the art within the technical scope of the present invention disclosed.
Claims (10)
1. A corrugated reinforced metal/fiber mixed structure plate is characterized by comprising an upper outer plate (1), a fiber core layer (2), a plurality of corrugated rib plates (3) and a lower outer plate (4); the upper outer plate (1) and the lower outer plate (4) are arranged in parallel at intervals, and the plurality of corrugated rib plates (3) are arranged between the upper outer plate (1) and the lower outer plate (4) in parallel; a fiber filling area is formed between the adjacent corrugated rib plates (3), and the fiber core layer (2) is filled in the fiber filling area; wherein, the fiber filaments in the fiber core layer (2) are uniformly distributed according to the same preset direction.
2. The corrugated reinforced metal/fiber mixed structural plate according to claim 1, wherein the corrugated rib plates (3) are semicircular corrugated rib plates; one end of the corrugated rib plate (3) is welded and fixed with the lower outer plate (4), and the other end is bonded and fixed with the upper outer plate (1).
3. The corrugated reinforced metal/fiber mixed structural plate as claimed in claim 1, wherein the fiber core layer (2) is a carbon fiber core layer, and the included angle between the fiber filaments in the carbon fiber core layer and the length direction of the upper outer plate (1) or the lower outer plate (4) is 0-90 degrees.
4. The corrugated reinforced metal/fiber hybrid structural plate as claimed in claim 1, wherein the upper outer plate (1) and the lower outer plate (4) are both made of structural steel; the corrugated rib plate (3) is formed by bending structural steel.
5. The corrugated reinforced metal/fiber mixed structural plate as claimed in claim 1, wherein the height of the corrugated rib plates (3) is the same as the thickness of the fiber core layer (2), and the height of the corrugated rib plates is 3/5 of the thickness of the mixed structural plate.
6. The method for manufacturing a corrugated reinforced metal/fiber hybrid structural plate as claimed in any one of claims 1 to 5, comprising the steps of:
step 1, processing an upper outer plate (1), a corrugated rib plate (3) and a lower outer plate (4) according to the design size requirement;
step 2, uniformly distributing the corrugated rib plates (3) between the upper outer plate (1) and the lower outer plate (4), and forming a plurality of fiber filling areas between adjacent corrugated rib plates (3) to obtain a metal cavity;
step 3, injecting a fiber resin mixed solution into a fiber filling area of the metal cavity;
step 4, applying a magnetic field effect to the outer side of the metal cavity injected with the fiber resin mixed solution, and enabling the fiber filaments in the fiber resin mixed solution to be uniformly distributed in the same preset direction under the action of the magnetic field; and then, curing and molding the fiber resin mixed solution to obtain a fiber core layer (2), namely, completing the manufacture of the corrugated reinforced metal/fiber mixed structure plate.
7. The method for manufacturing the corrugated reinforced metal/fiber mixed structural plate as claimed in claim 6, wherein the fiber resin mixed solution is prepared by the following steps:
shearing the cellosilk raw material to obtain isometric cellosilks with preset sizes;
under the action of inert gas, introducing the equal-length fiber yarns with preset sizes into the conductive liquid to obtain the fiber yarns wrapping the conductive liquid;
and mixing the fiber filaments wrapped with the conductive liquid with resin to obtain the fiber-resin mixed solution.
8. The method for manufacturing a corrugated reinforced metal/fiber mixed structural plate as claimed in claim 7, wherein the fiber raw material is subjected to a cutting process, and the fiber raw material is cut by a fiber cutting device.
9. The method for manufacturing the corrugated reinforced metal/fiber mixed structural plate as claimed in claim 6, wherein a two-degree-of-freedom magnetic field generating device is adopted to apply a magnetic field effect to the metal cavity injected with the fiber-resin mixed solution; the two-degree-of-freedom magnetic field generating device comprises an outer support (501), an inner support (502), an inner support hinge (503), an outer support hinge (504), a first electromagnetic generator (505) and a second electromagnetic generator (506);
outer support hinges (504) are symmetrically arranged at two ends of the outer support (501) in the vertical direction, and the outer support (501) can horizontally rotate along a connecting line of the two outer support hinges (501); inner support hinges (503) are symmetrically arranged at two ends of the outer support (501) in the horizontal direction, two horizontal ends of the inner support (502) are connected with the outer support (501) through the inner support hinges (503), and the inner support (502) can vertically turn over along a connecting line of the two inner support hinges (503); the first electromagnetic generator (505) is arranged at the upper end of the inner bracket (502), the second electromagnetic generator (506) is arranged at the bottom end of the inner bracket (502), and the magnetic poles generated by the first electromagnetic generator (505) and the second electromagnetic generator (506) are different; the metal cavity injected with the fiber resin mixed liquid is horizontally arranged in the inner bracket (502).
10. The method for manufacturing the corrugated reinforced metal/fiber mixed structural plate according to claim 6, wherein the volume fraction of the equal-length fiber filaments wrapping the conductive liquid in the fiber-resin mixed solution is 0.5-3%; the conductive liquid adopts graphite-based conductive adhesive.
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