CN219752617U - Near-net-size composite structure carbon fiber puncture preform - Google Patents
Near-net-size composite structure carbon fiber puncture preform Download PDFInfo
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- CN219752617U CN219752617U CN202320241957.XU CN202320241957U CN219752617U CN 219752617 U CN219752617 U CN 219752617U CN 202320241957 U CN202320241957 U CN 202320241957U CN 219752617 U CN219752617 U CN 219752617U
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- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 51
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 51
- 239000002131 composite material Substances 0.000 title claims abstract description 51
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 239000000835 fiber Substances 0.000 claims abstract description 29
- 230000000149 penetrating effect Effects 0.000 claims abstract description 15
- 239000004744 fabric Substances 0.000 claims description 17
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 abstract description 78
- 239000010959 steel Substances 0.000 abstract description 78
- 238000005520 cutting process Methods 0.000 abstract description 13
- 239000002994 raw material Substances 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 13
- 238000005056 compaction Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 238000000465 moulding Methods 0.000 description 5
- 238000009941 weaving Methods 0.000 description 5
- 238000002679 ablation Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000003892 spreading Methods 0.000 description 3
- 230000007480 spreading Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000009954 braiding Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000009417 prefabrication Methods 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
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Abstract
The utility model discloses a carbon fiber puncture preform with a near-net-size composite structure, which comprises an X-Y direction composite structure and a Z-direction fiber for vertically puncturing the X-Y direction composite structure; the horizontal section of the X-Y direction composite structure is in a positive n-shaped shape with a central opening, n=4m, m=2, 3,4 and … …; the Z-direction fibers are arranged in the X-Y direction composite structure in a penetrating way row by row. The advantages are that: the eight-prism (or dodecaprism, hexadecimal prism, etc.), hollow, nearly-gyroid and nearly-net-size carbon fiber puncture preform can be directly woven and formed, secondary cutting is not needed, and raw materials can be saved; the Z-direction steel needle usage amount can be reduced, the puncture resistance is reduced, and the large-size puncture preform can be formed; the Z-direction steel needle using amount is greatly reduced, the corresponding steel needle replacement workload is reduced in a same ratio, the forming efficiency is improved, and the production cost is reduced.
Description
Technical field:
the utility model relates to a carbon fiber puncture preform, in particular to a carbon fiber puncture preform with a near-net-size composite structure.
The background technology is as follows:
the carbon fiber puncture preform is a woven material with high three-dimensional strength, high isotropy, good overall structural strength and excellent mechanical properties, and the carbon/carbon composite material processed by the carbon fiber puncture preform has excellent ablation resistance, temperature impact resistance, overall structural strength, three-dimensional mechanical properties and the like, and is widely applied to high-end fields such as aviation, aerospace and the like.
At present, the weaving process of the domestic universal puncture preform is to utilize a pre-arranged steel needle matrix to integrally puncture and compact sheets such as carbon fiber laid cloth, laid cloth/net tyre, woven fabric and the like, and then manually finish the Z-direction steel needle replacement operation of the carbon fiber to obtain the puncture preform.
The problems that it has are as follows:
1. the molding mode and the structural design mode of the preform are single, only the cuboid-shaped preform can be woven and molded, and for the condition that the hollow cylindrical structure is required to be manufactured by the preform, a near-net-size workpiece cannot be finished at one time, and a near-net-size puncture preform is required to be obtained after cutting; thus, a certain amount of the preform needs to be cut off, which results in large raw material loss in the production process;
2. for the preparation of large-size puncture preforms, because the number of Z-direction steel needles is extremely large, the operation resistance is increased sharply, and the steel needle array is difficult to control in the process of puncture, so that the large-size puncture preforms cannot be prepared;
3. because the dosage of the Z-direction steel needle is large, the Z-direction steel needle needs to be replaced manually, and the Z-direction steel needle replacement operation corresponding to the cut prefabricated body part is equivalent to invalid work, the production efficiency is low, and the production cost is high.
4. Since no yarn is laid in the horizontal (X-Y) direction, the control difficulty of the steel needles at the edge of the steel needle array is high in the Z-direction steel needle replacement process.
The utility model comprises the following steps:
in order to solve the above problems, an object of the present utility model is to provide a near-net-size composite structure carbon fiber piercing preform.
The utility model is implemented by the following technical scheme:
a near-net-size composite structure carbon fiber puncture preform comprises an X-Y direction composite structure and a Z-direction fiber which vertically punctures the X-Y direction composite structure; the horizontal section of the X-Y direction composite structure is in a positive n-shape (n=4m, m=2, 3,4 … …) with a central opening; the Z-direction fibers are arranged in the X-Y direction composite structure in a penetrating way row by row at certain intervals.
Further, the X-Y direction composite structure comprises a plurality of planar ply structures and a plurality of yarn layer structures, and the planar ply structures and the yarn layer structures are alternately overlapped;
each layer of the planar ply structure is formed by vertically overlapping a plurality of layers of planar plies, and the total thickness of each layer of planar ply structure is 5-10 mm;
each yarn layer structure is formed by vertically overlapping one or more yarn layers, and each yarn layer comprises four layers of laid yarns, wherein:
first layer yarn laying: penetrating the first yarn along the direction parallel to any side of the planar pavement by gaps between the first row of Z-direction fibers and the second row of Z-direction fibers close to the side, and repeatedly paving the first yarn in a serpentine mode until the paving path of the first yarn covers 1/2 area of the planar pavement; the laying path of the second yarn and the laying path of the first yarn are symmetrical with the center of the plane layer;
and (3) laying yarns on a second layer: rotating all paving paths of the first layer of paving yarns by 90 degrees clockwise around the center of the plane paving layer to obtain paving yarn paths of the second layer of paving yarns;
third layer yarn laying: mirror symmetry is carried out on all paving paths of the first layer of paving yarns along the direction perpendicular to the yarn direction of the first yarn, namely, the paving paths of the third layer of paving yarns;
fourth layer yarn laying: and mirror-symmetrical all laying paths of the second layer of laying yarns along the direction parallel to the yarn direction of the first yarn, namely, the yarn laying path of the fourth layer of laying yarns.
Further, the planar layer is a composite layer obtained by overlapping carbon fiber woven non-woven cloth and carbon fiber net tyre.
Further, the Z-direction fiber is a carbon fiber.
The utility model has the advantages that:
1. the eight-prism (or dodecaprism, hexadecimal prism, etc.), hollow, nearly-gyroid and nearly-net-size carbon fiber puncture preform can be directly woven and formed, secondary cutting is not needed, and raw materials can be saved;
2. the Z-direction steel needle usage amount can be reduced, the puncture resistance is reduced, and the large-size puncture preform can be formed;
3. the usage amount of the Z-direction steel needle is greatly reduced, the corresponding steel needle replacement workload is reduced in a same ratio, the molding efficiency is improved, and the production cost is reduced;
4. through introducing the operation of carbon fiber shop yarn for the carbon fiber who lays can play spacing and keep the effect to puncture steel needle, has reduced the steel needle array control degree of difficulty in the puncture process, also is favorable to the shaping of jumbo size puncture prefabrication body, moreover, can also promote the hoop intensity of prefabrication body, promotes the isotropy of X-Y to the performance.
5. By locally paving a plurality of circulating yarns, the content of local continuous fibers can be improved, and the mechanical property and ablation resistance of the part can be improved.
Description of the drawings:
in order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of the structure of a planar ply in example 1;
FIG. 2 is an overall schematic of a piercing preform obtained by alternately overlapping a planar lay-up structure and a yarn layer structure, i.e., an overall schematic of a piercing preform prepared by the method of example 2;
FIG. 3 is a schematic overall view of a piercing preform with a partial height of multiple yarn layers and the rest of the piercing preform alternately overlapped with the yarn layers by a planar lay-up structure, i.e., a piercing preform prepared by the method of example 3;
FIG. 4 is a schematic view showing the structure of a yarn layer in the piercing preform in example 1;
FIG. 5 is a schematic representation of a planar lay-up of the penetrating steel pin arrays of examples 2 and 3;
FIG. 6 is a first yarn lay path during the first layer lay in examples 2 and 3;
FIG. 7 is a schematic view of the first layer of yarn in examples 2 and 3 after the first layer of yarn is laid;
fig. 8 is a schematic diagram of the yarn laying operation of example 2 and example 3 after one cycle is completed.
In the figure: the puncture needle comprises a puncture steel needle 1, a plane layer 2, a puncture preform 3, a yarn layer structure 4, yarns 5 and Z-direction fibers 6.
The specific embodiment is as follows:
the following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Example 1:
a near-net-size composite structure carbon fiber puncture preform comprises an X-Y direction composite structure and a Z-direction fiber 6 which vertically punctures the X-Y direction composite structure; the horizontal section of the X-Y direction composite structure is in a positive n-shape with a central opening (n=4m, m=2, 3,4 … …); the Z-direction fibers 6 are arranged in the X-Y direction composite structure in a row-by-row manner.
The X-Y direction composite structure comprises a plurality of planar layering structures and a plurality of yarn layer structures 4, and the planar layering structures and the yarn layer structures 4 are alternately overlapped;
each layer of planar pavement 2 structure is formed by vertically overlapping a plurality of layers of planar pavement 2, and the total thickness of each layer of planar pavement 2 structure is 5-10 mm;
each yarn layer structure 4 is formed by vertically overlapping one or more yarn layers, and each yarn layer comprises four layers of laid yarns, wherein:
first layer yarn laying: the first yarn 5 penetrates through gaps between the first row of Z-direction fibers 6 and the second row of Z-direction fibers 6 near any side of the planar ply 2 along the direction parallel to the side, and is laid in a serpentine manner until the laying path of the first yarn 5 covers 1/2 of the total area of the planar ply 2; the laying path of the second yarn 5 and the laying path of the first yarn 5 are symmetrical with each other in the center of the planar layer 2;
and (3) laying yarns on a second layer: rotating all paving paths of the first layer of paving yarns by 90 degrees clockwise around the center of the plane paving layer 2 to obtain paving yarn paths of the second layer of paving yarns;
third layer yarn laying: mirror symmetry is carried out on all paving paths of the first layer of paving yarns along the direction perpendicular to the direction of the yarns 5 of the first yarns 5, namely, paving yarn paths of the third layer of paving yarns;
fourth layer yarn laying: and mirror-symmetry is carried out on all laying paths of the second layer of laying yarns along the direction parallel to the direction of the yarns 5 of the first yarn 5, namely, the laying paths of the fourth layer of laying yarns.
Further, the planar layer 2 is a composite layer obtained by overlapping carbon fiber woven laid cloth and a carbon fiber net tyre. The yarn 5 adopts carbon fiber filaments, and the Z-direction fiber 6 is 1K, 3K or 6K carbon fiber.
Example 2:
according to the one-step formed near net-size composite structure carbon fiber puncture preform 3, the effective outer diameter is 500mm, the effective inner diameter is 200mm, the height is 300mm, and the volume density is 0.75g/cm 3 The Z-direction fiber 6 is double 6K carbon fiber and interval2.4mm; the preform structure adopts a structure in which a planar layer 2 with a thickness of 5mm to 10mm and a circulating 6K carbon fiber continuous fiber yarn layer are alternately overlapped, as shown in figure 2. The braiding method specifically comprises the following steps:
s1, laying and blanking: cutting raw materials into a regular octagonal plane layer 2 with a central opening by a numerical control cutting machine according to the X-Y direction size of a puncture preformed body 3 to be woven and formed, and ensuring that the single side size of the plane layer 2 is left with 5-10 mm allowance during blanking, wherein the outer side length of the plane layer 2 is 207mm, and the inner side length is 83mm; the raw material is a composite layer obtained by overlapping carbon fiber woven laid cloth and a carbon fiber net tyre.
S2, selecting and arranging needles: selecting 130340 puncture steel needles with proper length and diameter according to the size and shape of the planar paving layer 2 obtained by cutting in the S1, the thickness size of the puncture preformed body 3 to be woven and the distance parameter of the Z-direction fibers 6, screening the straightness and length consistency of the puncture steel needles 1, and ensuring the length deviation of the puncture steel needles 1 to be +/-0.5 mm; arranging the selected puncture steel needles 1 on a steel needle array limiting device according to the shape of the regular octagonal plane layer 2, wherein the number of steel needles in each row can be calculated in advance during needle arrangement;
s3, holding the steel needle array: according to the Z-direction fiber 6 spacing parameter of the puncture preform 3 to be woven and formed, adding an array holding device with corresponding size into the steel needle array arranged in the S2, adjusting the steel needle array to 2.4mm steel needle spacing, fully protecting and controlling the puncture steel needles 1 in the array, checking and replacing the puncture steel needles 1 with bad states in the array after the steel needle array is adjusted, and starting the steel needle array needling operation;
s4, needling cloth and spreading yarn: selecting 10-20 layers of planar laminates 2 obtained by cutting in the step S1, vertically overlapping, then laying the planar laminates 2 on the upper part of the steel needle array obtained in the step S3, and penetrating the plurality of layers of planar laminates 2 into the steel needle array by using a template, wherein the graph is shown in FIG. 5; then, carrying out one or more circulating yarn paving operations in a gap of the puncture steel needle 1 of the steel needle array above the planar layer 2 by utilizing carbon fiber continuous filaments according to a yarn paving rule, wherein the tension of the yarns 5 is mainly controlled in the yarn paving process, and the uniformly binding force of the paved yarns 5 on the puncture steel needle 1 at the outermost layer of the steel needle array is ensured; repeating the operations of needling and yarn laying until the thickness dimension of the puncture preform 3 to be woven and molded is reached, thereby obtaining a composite structure to be compacted;
in S4, the total thickness of the plane layer 2 of each thorn cloth is 5-10 mm.
Further, the yarn laying rule in S4 is:
first layer yarn laying: the first yarn 5 penetrates through the gaps between the first row of penetrating steel needles 1 and the second row of penetrating steel needles 1 near any side of the planar layer 2 along the direction parallel to the side, and is laid in a serpentine manner until the laying path of the first yarn 5 covers 1/2 of the total area of the planar layer 2, as shown in fig. 6; the laying path of the second yarn 5 is centrosymmetric to the laying path of the first yarn 5 with respect to the center of the planar ply 2, as shown in fig. 7;
and (3) laying yarns on a second layer: rotating all paving paths of the first layer of paving yarns by 90 degrees clockwise around the center of the plane paving layer 2 to obtain paving yarn paths of the second layer of paving yarns;
third layer yarn laying: mirror symmetry is carried out on all paving paths of the first layer of paving yarns along the direction perpendicular to the direction of the yarns 5 of the first yarn 5, so that paving paths of the third layer of paving yarns are obtained;
fourth layer yarn laying: mirror symmetry is carried out on all paving paths of the second layer of paving yarns along the direction parallel to the direction of the yarns 5 of the first yarn 5, so that paving paths of the fourth layer of paving yarns are obtained;
after all the four layers of yarn are finished, one cycle of yarn laying operation is completed, as shown in fig. 8.
S5, compacting: the composite structure to be compacted obtained in the step S4 is moved to a pressurizing device for compaction operation, the X-Y direction plane layering layer 2 is compacted to be 300mm thick, the X-Y direction composite structure with the volume density meeting the design requirement is obtained, and for the cloth moving and compaction operation of the weaving and forming of the large-outline-size near-net-size puncture preform 3, the cloth moving and compaction operation is carried out by using a steel needle interval maintaining device matched with the wall thickness of the preform and a pressurizing auxiliary device matched with the inner hole size of the puncture preform 3;
s6, replacing a Z-direction steel needle by carbon fibers: fixing the X-Y direction composite structure obtained in the step S5 by using a thickness maintaining device, moving the X-Y direction composite structure to a steel needle replacement workbench, and sequentially horizontally and reciprocally completing steel needle replacement row by using 1K, 3K or 6K carbon fibers according to the design requirement of the preform until the used puncture steel needle 1 is replaced, so that chain lock catch weaving of the X-Y direction composite structure is realized, and a puncture preform 3 is obtained.
Example 3:
according to the one-step formed near-net-size composite structure carbon fiber puncture preform 3, the effective outer diameter is 500mm, the effective inner diameter is 200mm, and the volume density of the preform is divided into three sections: surface to 100mm height range 0.75g/cm 3 Height range of 100 mm-200 mm is 0.85g/cm 3 200mm to 300mm in the range of 0.75g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the The Z-direction fibers 6 are double 6K carbon fibers with a spacing of 2.4mm; preform structure: a multi-cycle 6K carbon fiber continuous filament yarn laying structure is adopted in the height range of 100 mm-200 mm; the rest adopts a structure that a planar layer 2 with the thickness of 5 mm-10 mm is alternately overlapped with a circulating 6K carbon fiber continuous fiber yarn layer, as shown in figure 3. The braiding method specifically comprises the following steps:
s1, laying and blanking: cutting raw materials into a regular octagonal plane layer 2 with a central opening by a numerical control cutting machine according to the X-Y direction size of a puncture preformed body 3 to be woven and formed, and ensuring that the single side size of the plane layer 2 is left with 5-10 mm allowance during blanking, wherein the outer side length of the plane layer 2 is 207mm, and the inner side length is 83mm; the raw material is a composite layer obtained by overlapping carbon fiber woven laid cloth and a carbon fiber net tyre.
S2, selecting and arranging needles: selecting 130340 puncture steel needles with proper length and diameter according to the size and shape of the planar paving layer 2 obtained by cutting in the S1, the thickness size of the puncture preformed body 3 to be woven and the distance parameter of the Z-direction fibers 6, screening the straightness and length consistency of the puncture steel needles 1, and ensuring the length deviation of the puncture steel needles 1 to be +/-0.5 mm; arranging the selected puncture steel needles 1 on a steel needle array limiting device according to the shape of the regular octagonal plane layer 2, wherein the number of the puncture steel needles 1 in each row can be calculated in advance during needle arrangement;
s3, holding the steel needle array: according to Z-direction fiber spacing parameters of the puncture preformed body 3 to be woven and formed, adding an array holding device with corresponding size into the steel needle array arranged in the S2, adjusting the steel needle array to 2.4mm steel needle spacing, fully protecting and controlling the puncture steel needles 1 in the array, checking and replacing the puncture steel needles 1 with bad states in the array after the steel needle array is adjusted, and starting the steel needle array needling operation;
s4, needling cloth and spreading yarn: selecting 10-20 layers of planar laminates 2 obtained by cutting in the step S1, vertically overlapping, then laying the planar laminates 2 on the upper part of the steel needle array obtained in the step S3, and penetrating the plurality of layers of planar laminates 2 into the steel needle array by using a template, wherein the graph is shown in FIG. 5; then, carrying out one or more circulating yarn paving operations in a gap of the puncture steel needle 1 of the steel needle array above the planar layer 2 by utilizing carbon fiber continuous filaments according to a yarn paving rule, wherein the tension of the yarns 5 is mainly controlled in the yarn paving process, and the uniformly binding force of the paved yarns 5 on the puncture steel needle 1 at the outermost layer of the steel needle array is ensured; repeating the operations of needling and yarn laying until the thickness dimension of the puncture preform 3 to be woven and molded is reached, thereby obtaining a composite structure to be compacted;
in S4, the total thickness of the plane layer 2 of each thorn cloth is 5-10 mm.
Further, the yarn laying rule in S4 is:
first layer yarn laying: the first yarn 5 penetrates through the gaps between the first row of penetrating steel needles 1 and the second row of penetrating steel needles 1 near any side of the planar layer 2 along the direction parallel to the side, and is laid in a serpentine manner until the laying path of the first yarn 5 covers 1/2 of the total area of the planar layer 2, as shown in fig. 6; the laying path of the second yarn 5 is centrosymmetric to the laying path of the first yarn 5 with respect to the center of the planar ply 2, as shown in fig. 7;
and (3) laying yarns on a second layer: rotating all paving paths of the first layer of paving yarns by 90 degrees clockwise around the center of the plane paving layer 2 to obtain paving yarn paths of the second layer of paving yarns;
third layer yarn laying: mirror symmetry is carried out on all paving paths of the first layer of paving yarns along the direction perpendicular to the direction of the yarns 5 of the first yarn 5, so that paving paths of the third layer of paving yarns are obtained;
fourth layer yarn laying: mirror symmetry is carried out on all paving paths of the second layer of paving yarns along the direction parallel to the direction of the yarns 5 of the first yarn 5, so that paving paths of the fourth layer of paving yarns are obtained;
after all the four layers of yarn are finished, one cycle of yarn laying operation is completed. As shown in fig. 8.
S5, compacting: the composite structure to be compacted obtained in the step S4 is moved to a pressurizing device for compaction operation, the X-Y direction plane layering layer 2 is compacted to be 300mm thick, the X-Y direction composite structure with the volume density meeting the design requirement is obtained, and for the cloth moving and compaction operation of the weaving and forming of the large-outline-size near-net-size puncture preform 3, the cloth moving and compaction operation is carried out by using a steel needle interval maintaining device matched with the wall thickness of the preform and a pressurizing auxiliary device matched with the inner hole size of the puncture preform 3;
s6, replacing a Z-direction steel needle by carbon fibers: fixing the X-Y direction composite structure obtained in the step S5 by using a thickness maintaining device, moving the X-Y direction composite structure to a steel needle replacement workbench, and sequentially horizontally and reciprocally completing steel needle replacement row by using 1K, 3K or 6K carbon fibers according to the design requirement of the preform until the used puncture steel needle 1 is replaced, so that chain lock catch weaving of the X-Y direction composite structure is realized, and a puncture preform 3 is obtained.
Comparative example 1:
carbon fiber puncture preform 3 molded by traditional method and having volume density of 0.75g/cm 3 The Z-direction fibers are double 6K carbon fibers with a spacing of 2.4mm; the X-Y direction is formed by laminating and compacting composite units of 12K carbon fiber woven laid cloth/carbon fiber net tyre; firstly, shaping to obtain a puncture preform with the external dimensions of 500mm multiplied by 300mm, and then cutting the puncture preform into a hollow eight-prism-shaped puncture preform with the effective external diameter of 500mm, the effective internal diameter of 200mm and the height of 300 mm. The corresponding puncture preformed body is molded to actually replace 43681 steel needles, and part of the preformed body is cut off to weight 16.6Kg (become solid waste).
By comparing the first embodiment, the second embodiment with the first comparative embodiment, it can be obtained that:
in the first embodiment and the second embodiment, the puncture preformed body 3 is molded to actually replace the steel needle 30340, and secondary cutting is not needed after the preformed body is molded, so that the near-net-size puncture preformed body 3 can be directly molded; because the steel needle used in the molding process is reduced by 30.6% compared with the first comparative example, the piercing cloth resistance and compaction pressure value during molding are effectively reduced, and the steel needle replacement amount is more suitable for molding the large-size piercing preform 3. Through introducing the operation of spreading yarn, the hoop strength is increased, the fiber content is improved, and the ablation performance is further improved.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (4)
1. The carbon fiber puncture preform with the near-net-size composite structure is characterized by comprising an X-Y direction composite structure and a Z-direction fiber which vertically punctures the X-Y direction composite structure; the horizontal section of the X-Y direction composite structure is in a positive n-shaped shape with a central opening, n=4m, m=2, 3,4 and … …; the Z-direction fibers are arranged in the X-Y direction composite structure in a penetrating way row by row.
2. The near-net-size composite carbon fiber penetrating preform of claim 1, wherein the X-Y composite structure comprises a plurality of planar lay-up structures and a plurality of yarn layer structures, and wherein the planar lay-up structures and the yarn layer structures are alternately overlapped;
each layer of the planar ply structure is formed by vertically overlapping a plurality of layers of planar plies, and the total thickness of each layer of planar ply structure is 5-10 mm;
each yarn layer structure is formed by vertically overlapping one or more yarn layers, and each yarn layer comprises four layers of laid yarns, wherein:
first layer yarn laying: penetrating the first yarn along the direction parallel to any side of the planar ply by gaps between the first row of Z-direction fibers and the second row of Z-direction fibers close to the side, and paving the first yarn in a serpentine manner until the paving path of the first yarn covers 1/2 area of the planar ply; the laying path of the second yarn and the laying path of the first yarn are symmetrical with the center of the plane layer;
and (3) laying yarns on a second layer: rotating all paving paths of the first layer of paving yarns by 90 degrees clockwise around the center of the plane paving layer to obtain paving yarn paths of the second layer of paving yarns;
third layer yarn laying: mirror symmetry is carried out on all paving paths of the first layer of paving yarns along the direction perpendicular to the yarn direction of the first yarn, namely, the paving paths of the third layer of paving yarns;
fourth layer yarn laying: and mirror-symmetrical all laying paths of the second layer of laying yarns along the direction parallel to the yarn direction of the first yarn, namely, the yarn laying path of the fourth layer of laying yarns.
3. The near net-size composite structural carbon fiber penetrating preform of claim 2, wherein the planar layup is a composite layup obtained by overlapping a carbon fiber woven laid fabric and a carbon fiber mesh tire.
4. The near net-size composite structural carbon fiber penetrating preform of claim 1, wherein the Z-direction fibers are carbon fibers.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320241957.XU CN219752617U (en) | 2023-02-13 | 2023-02-13 | Near-net-size composite structure carbon fiber puncture preform |
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| CN202320241957.XU CN219752617U (en) | 2023-02-13 | 2023-02-13 | Near-net-size composite structure carbon fiber puncture preform |
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Address after: 010060 Planning Second Street, Hongsheng Industrial Park, Xincheng District, Hohhot City, Inner Mongolia Autonomous Region Patentee after: Inner Mongolia Aerospace Tuoli New Materials Co.,Ltd. Country or region after: China Address before: 010070 Planning Second Street, Hongsheng Industrial Park, Xincheng District, Hohhot City, Inner Mongolia Autonomous Region Patentee before: INNER MONGOLIA HEXI AEROSPACE TECHNOLOGY DEVELOPMENT CO.,LTD. Country or region before: China |