CN111016003B - Shaped tooling and C/SiC composite structure forming method using the shaped tooling - Google Patents
Shaped tooling and C/SiC composite structure forming method using the shaped tooling Download PDFInfo
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- CN111016003B CN111016003B CN201911283240.6A CN201911283240A CN111016003B CN 111016003 B CN111016003 B CN 111016003B CN 201911283240 A CN201911283240 A CN 201911283240A CN 111016003 B CN111016003 B CN 111016003B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B15/00—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00
- B29B15/08—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00 of reinforcements or fillers
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Abstract
本发明属于C/SiC复合材料预制体成型工装及方法，为解决现有C/SiC复合材料结构件采用单个零件成型后再铆焊组装的成型工艺，在组装时存在局部空间狭窄，操作困难，装配精度低的问题，提供定型工装及使用定型工装的C/SiC复合材料结构件成型方法。定型工装包括拱形的定型顶板，定型顶板安装于定型底板上，定型顶板和定型底板的背侧向内弯折形成定型支撑沿，定型顶板和定型底板上均开设有多个限位槽，限位平板卡接于限位槽内。成型方法是利用盒型组件进行定型支撑，限位槽和限位平板调整盒型组件的碳纤维布厚度保证了碳布的平整和厚度一致；翻边处理垫铺整布，对翻边裁剪口部位进行补强，保证了复合材料的整体强度。先对C/SiC复合材料结构件定型，再进行沉积。
The invention belongs to a C/SiC composite material preform forming tool and method. In order to solve the forming process of using a single part to form a single part and then riveting and assembling the existing C/SiC composite material structural parts, the local space is narrow and the operation is difficult during assembly. To solve the problem of low assembly accuracy, we provide a shaping tool and a method for forming C/SiC composite structural parts using the shaping tool. The shaping tooling includes an arched shaping top plate. The shaping top plate is installed on the shaping bottom plate. The back sides of the shaping top plate and shaping bottom plate are bent inward to form shaping support edges. The positioning plate is snapped into the limiting slot. The molding method is to use box-shaped components for shaping support, and the limit groove and limit plate adjust the thickness of the carbon fiber cloth of the box-shaped components to ensure the flatness and thickness of the carbon cloth; Reinforcement is carried out to ensure the overall strength of the composite material. The C/SiC composite structure is first shaped and then deposited.
Description
Technical Field
The invention belongs to a C/SiC composite material prefabricated part forming tool and a C/SiC composite material prefabricated part forming method, and particularly relates to a forming tool and a C/SiC composite material structural part forming method using the forming tool.
Background
The cabin type C/SiC composite material structural member has the advantages of large general size specification, more grids and complex curved surface. The existing forming process generally splits a large-scale structural part into a plurality of small-scale structural parts, and firstly forms a single small part and then rivet welding, assembling and forming the small part. The problems of narrow local space, difficult operation and low assembly precision often exist when the conventional rivet welding process is adopted for assembly. And in the rivet welding process, the pores among the grids are larger.
Disclosure of Invention
The invention mainly aims to solve the technical problems of narrow local space, difficult operation and low assembly precision of the existing C/SiC composite material structural part formed by adopting a single part and then rivet welding and assembling, and provides a shaping tool and a C/SiC composite material structural part forming method using the same.
In order to achieve the purpose, the invention provides the following technical scheme:
the shaping tool is characterized by comprising a shaping top plate, a shaping bottom plate and a limiting flat plate;
the shaping top plate is arched and is arranged on the shaping bottom plate;
the back side of the shaping top plate is bent inwards to form a top plate supporting edge, the back side of the shaping bottom plate is bent inwards to form a bottom plate supporting edge, and the top plate supporting edge and the bottom plate supporting edge form a shaping supporting edge together;
the front side edge of the shaping top plate is flush with the front side edge of the shaping bottom plate;
a plurality of limiting grooves are formed in the shaping top plate and the shaping bottom plate;
the limiting flat plate is clamped in the limiting groove.
Furthermore, the shaping top plate is formed by splicing a first arc-shaped plate and a second arc-shaped plate; the shaping bottom plate is formed by splicing a first flat plate and a second flat plate.
The forming method of the C/SiC composite material structural part by using the shaping tool is characterized by comprising the following steps of:
Taking a plurality of box-shaped parts with upper openings, wherein the shape size of each box-shaped part is matched with a shaping top plate or a shaping bottom plate between adjacent limiting grooves, and holes are formed in each side wall of each box-shaped part in a connection relationship, wherein the hole diameter is 3-6mm, and the hole center distance is 6-10 mm;
The outer wall of each box-shaped piece is wrapped with a plurality of layers of carbon fiber cloth, and the edge of the carbon fiber cloth is higher than the upper surface of the box-shaped piece;
Placing at least two box-shaped parts in the same direction, and fixing the adjacent surfaces of every two adjacent box-shaped parts to form a box-shaped assembly; the height of the box-type assembly is greater than the distance from the back side to the front side of the shaping top plate and the shaping bottom plate;
step 4, adjusting the thickness of the carbon fiber cloth of the box-shaped assembly
Placing the box-shaped assemblies between adjacent limiting grooves of the shaping top plate or the shaping bottom plate one by one, fixing the lower bottom surfaces of the box-shaped assemblies on the shaping supporting edges, and attaching the back surfaces of the box-shaped assemblies to the shaping top plate or the shaping bottom plate; inserting a limiting flat plate into a limiting groove on one side of the box-shaped component; if the limiting flat plate can be inserted into the limiting groove on the other side and the gap between the limiting flat plate and the outer side of the box-shaped component reaches a preset gap value, otherwise, the thickness of the carbon fiber cloth on the outer side of the box-shaped component is adjusted until the limiting flat plate can be inserted into the limiting grooves on the two sides of the box-shaped component and the gap between the limiting flat plate and the outer side of the box-shaped component reaches the preset gap value; completing the shaping of all box-type components;
step 5, sewing the adjacent surfaces of the box-shaped part
Sewing the adjacent surfaces of the adjacent box-shaped parts in the box-shaped components respectively;
Wrapping and fixing a plurality of layers of carbon fiber cloth on 2 side walls and the lower bottom surface outside the box-shaped component, wherein the edges of the carbon fiber cloth are higher than the box-shaped component;
Mounting the box-shaped assemblies processed in the step 6 in a shaping tool, wherein each box-shaped assembly is fixed on a shaping support edge of the shaping tool;
Sewing the adjacent surfaces of the adjacent box-shaped assemblies respectively, then removing the shaping top plate and the shaping bottom plate, wherein all the box-shaped assemblies jointly form a prefabricated body with the same inner shape as the shaping tool, the part corresponding to the shaping top plate is a prefabricated body arch part, and the part corresponding to the shaping bottom plate is a horizontal part;
step 9, flanging treatment
Step 9.1, respectively installing flanging pressing plates on the upper bottom surface and the lower bottom surface of the outer side of the prefabricated body;
step 9.2, wrapping and fixing a plurality of layers of carbon fiber cloth on the side surface of the prefabricated body, wherein the edge of the carbon fiber cloth is higher than the side surface of the prefabricated body;
9.3, successively removing the flanging pressing plates on the upper bottom surface and the lower bottom surface of the prefabricated body, turning down the carbon fiber cloth to the bottom surface of the prefabricated body layer by layer, cutting off the carbon fiber cloth at the joint of the horizontal part and the arched part of the prefabricated body when turning down, laying a layer of carbon fiber whole cloth on each turned carbon fiber cloth layer, and laying a layer of carbon fiber whole cloth on the uppermost layer until all the carbon fiber cloth layers are turned down;
step 9.4, sewing the upper bottom surface and the lower bottom surface of each box-shaped component in the prefabricated body respectively;
step 10, serging
And (4) carrying out overlocking on the carbon fiber cloth which is higher than the opening on the box-shaped piece in the prefabricated body.
Further, the sewing in the step 5 is specifically to perform sewing by using carbon fibers, and two needles of carbon fibers penetrate through holes of the holes of each box-shaped part.
Further, the sewing in step 8 is specifically performed by using carbon fibers, and two needles of carbon fibers pass through holes of the holes of each box-shaped member.
Further, the sewing in step 9.4 is specifically performed by using carbon fibers, and two needles of carbon fibers pass through holes of the holes of each box-shaped member.
Further, in the step 2, the edge of the carbon fiber cloth is higher than the upper surface of the box-shaped piece by 5-10 mm.
Further, in step 6, the edge of the carbon fiber cloth is higher than the box-shaped component by 5-10 mm.
Further, in step 7, the step of mounting the box-shaped assemblies processed in the step 6 in the shaping tool is specifically that the box-shaped assemblies are respectively mounted on the shaping bottom plate and the shaping top plate one by one from two sides to the middle.
Compared with the prior art, the invention has the beneficial effects that:
1. the shaping tool is mainly used for shaping a prefabricated part of a C/SiC composite material structural part and is formed by splicing a shaping top plate, a shaping bottom plate and a limiting flat plate, wherein an internal space formed by the shaping top plate and the shaping bottom plate is designed according to the size requirement of a product; the limiting groove is convenient to match with the limiting flat plate to adjust the thickness of the carbon fiber cloth of the box-shaped component. Simple structure, easy dismounting, and it is firm to stereotype.
2. The shaping top plate and the shaping bottom plate are spliced, and the processing and the transportation are convenient.
3. According to the forming method of the C/SiC composite material structural part using the forming tool, the C/SiC composite material structural part is formed before deposition, and then SiC matrix deposition is carried out. The shaping tool is simple and convenient to use and convenient to operate. The carbon fiber cloth thickness of the box-shaped component is adjusted by utilizing the limiting groove and the limiting flat plate, so that the flatness and the consistent thickness of the carbon fiber cloth are ensured; the carbon fiber whole cloth is laid during the flanging treatment, the flanging cutting opening is reinforced, and the overall strength of the composite material is ensured. The assembly of each part is realized at the prefabricated body stage, and the prefabricated body is flexible carbon cloth material, and the adjustment space is big, can guarantee the assembly precision. The box-type components are connected through tightly sewed carbon fibers, after the box-type components are assembled, SiC matrix is deposited, and gaps among the box-type components are small; after the box type assembly is assembled, the carbon cloth with a certain thickness is integrally wound outside the box type assembly, so that the integral strength of the component can be improved.
4. When the carbon fiber cloth is wrapped, the edge of the carbon fiber cloth is 5-10mm higher than the upper surface of the box-shaped piece or the box-shaped component and is used for subsequent edge locking, if the carbon fiber cloth is not easily layered, the performance is affected, but the reserved height needs to be reasonable. If the height is too high, the carbon fiber cloth is wasted, and if the reservation is too little, the edge locking is not facilitated.
Drawings
FIG. 1 is a schematic structural diagram of a sizing tool in an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a cassette assembly according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram illustrating the use of a position-limiting plate to shape the box-shaped component according to a first embodiment of the present invention;
fig. 4 is a schematic view of an installation sequence of the box-shaped component in the shaping tool according to the embodiment of the invention;
FIG. 5 is a schematic structural view of a turn-up platen according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a preform according to a first embodiment of the present invention.
Wherein the reference numbers: 1-shaping top plate, 101-first arc plate, 102-second arc plate, 2-shaping bottom plate, 201-first flat plate, 202-second flat plate, 3-shaping supporting edge, 4-limiting groove, 5-box-shaped part, 6-box-shaped component, 7-limiting flat plate, 8-flanging pressing plate and 9-prefabricated body.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention and the accompanying drawings, and it is obvious that the described embodiments do not limit the present invention.
The invention designs a shaping tool shown in figure 1 for shaping a C/SiC composite material structural member, which comprises a shaping top plate 1, a shaping bottom plate 2 and a limiting flat plate 7; the shaping top plate 1 is arched, and the shaping top plate 1 is arranged on the shaping bottom plate 2, can be limited by pins and is fixed by bolts; the back side of the shaping top plate 1 is bent inwards to form a top plate supporting edge, the back side of the shaping bottom plate 2 is bent inwards to form a bottom plate supporting edge, and the top plate supporting edge and the bottom plate supporting edge jointly form a shaping supporting edge 3; the front side edge of the shaping top plate 1 is flush with the front side edge of the shaping bottom plate 2; a plurality of limiting grooves 4 are formed in the shaping top plate 1 and the shaping bottom plate 2; the limiting flat plate 7 is clamped in the limiting groove 4. The shaping top plate 1 and the shaping bottom plate 2 can be spliced to facilitate processing and transportation, and the shaping top plate 1 is formed by splicing a first arc-shaped plate 101 and a second arc-shaped plate 102; the shaping bottom plate 2 is formed by splicing a first flat plate 201 and a second flat plate 202.
Example one
The forming method of the C/SiC composite material structural part using the shaping tool comprises the following steps:
Taking a plurality of box-shaped parts 5 with upper openings, wherein the shape size of each box-shaped part 5 is matched with the shaping top plate 1 or the shaping bottom plate 2 between the adjacent limiting grooves 4, and holes are distributed on each side wall of each box-shaped part 5 with a connection relation, the hole diameter is 3mm, and the hole center distance is 6 mm;
The outer wall of each box-shaped piece 5 is wrapped with a plurality of layers of carbon fiber cloth, and the edge of the carbon fiber cloth is 5mm higher than the upper surface of each box-shaped piece 5;
As shown in fig. 2, two box-shaped members 5 are placed in the same direction, and the adjacent surfaces of the adjacent box-shaped members 5 are fixed by pins to form a box-shaped assembly 6; the height of the box-shaped component 6 is larger than the distance from the back side to the front side of the shaping top plate 1 and the shaping bottom plate 2;
step 4, adjusting the thickness of the carbon fiber cloth of the box-shaped assembly
As shown in fig. 3, the box-shaped components 6 are placed between the adjacent limiting grooves 4 of the shaping top plate 1 or the shaping bottom plate 2 one by one, the lower bottom surfaces of the box-shaped components 6 are fixed on the shaping supporting edges 3, and the back surfaces of the box-shaped components 6 are attached to the shaping top plate 1 or the shaping bottom plate 2; a limiting flat plate 7 is inserted into the limiting groove 4 on one side of the box-shaped component 6; if the limiting flat plate 7 can be inserted into the limiting groove 4 on the other side and the gap between the limiting flat plate 7 and the outer side of the box-shaped component 6 reaches a preset gap value, finishing shaping, otherwise, adjusting the thickness of the carbon fiber cloth on the outer side of the box-shaped component 6 until the limiting flat plate 7 can be inserted into the limiting grooves 4 on the two sides of the box-shaped component 6 and the gap between the limiting flat plate 7 and the outer side of the box-shaped component 6 reaches the preset gap value; completing the shaping of all the box-type components 6;
step 5, sewing the adjacent surfaces of the box-shaped part 5
Respectively sewing adjacent surfaces of adjacent box-shaped parts 5 in the box-shaped component 6 by using carbon fibers, and enabling two needles of carbon fibers to penetrate through holes of each box-shaped part 5;
2 side walls and the lower bottom surface outside the box-shaped component 6 are wrapped and fixed with a plurality of layers of carbon fiber cloth by solid glue, and the edge of the carbon fiber cloth is 10mm higher than the box-shaped component;
Installing the box-shaped assemblies 6 processed in the step 6 in a shaping tool according to the sequence shown by the numbers in the figure 4, wherein each box-shaped assembly 6 is fixed on a shaping supporting edge 3 of the shaping tool;
Sewing the adjacent surfaces of the adjacent box-shaped components 6 by using carbon fibers respectively, and enabling the holes of the box-shaped components 5 matched with the holes to penetrate through two needles of carbon fibers; then the shaping top plate 1 and the shaping bottom plate 2 are removed; as shown in fig. 6, all the box-type components 6 together form a preform 9 having the same inner shape as the shaping tool, the part corresponding to the shaping top plate 1 is an arched part of the preform 9, and the part corresponding to the shaping bottom plate 2 is a horizontal part;
step 9, flanging treatment
Step 9.1, as shown in fig. 5, respectively installing flanging pressing plates 8 on the upper bottom surface and the lower bottom surface of the outer side of the prefabricated body 9;
step 9.2, wrapping and fixing a plurality of layers of carbon fiber cloth on the side surface of the prefabricated body 9, wherein the edge of the carbon fiber cloth is higher than the side surface of the prefabricated body 9;
9.3, successively removing the flanging pressing plates 8 on the upper bottom surface and the lower bottom surface of the prefabricated part 9, turning down the carbon fiber cloth to the bottom surface of the prefabricated part 9 layer by layer, cutting off the carbon fiber cloth at the joint of the horizontal part and the arched part of the prefabricated part 9 when turning down, laying a layer of carbon fiber whole cloth on each layer of turned carbon fiber cloth until the uppermost layer of carbon fiber whole cloth is laid after all the carbon fiber cloth is turned down;
step 9.4, sewing the upper bottom surface and the lower bottom surface of each box-shaped component 6 in the prefabricated part 9 by using carbon fibers, and enabling two needles of carbon fibers to penetrate through holes of each box-shaped component 5 matched with the holes;
step 10, serging
The carbon fiber cloth in the preform 9 protruding out of the opening in the box-shaped part 5 is subjected to overlocking.
Example two
The C/SiC composite material structural part forming method using the shaping tool comprises the following steps:
Taking a plurality of box-shaped parts 5 with upper openings, wherein the shape size of each box-shaped part 5 is matched with the shaping top plate 1 or the shaping bottom plate 2 between the adjacent limiting grooves 4, and holes are distributed on each side wall of each box-shaped part 5 with a connection relation, the hole diameter is 5mm, and the hole center distance is 9 mm;
The outer wall of each box-shaped piece 5 is wrapped with a plurality of layers of carbon fiber cloth, and the edge of the carbon fiber cloth is 8mm higher than the upper surface of each box-shaped piece 5;
Placing at least two box-shaped parts 5 in the same direction, and fixing the adjacent surfaces of every two adjacent box-shaped parts 5 to form a box-shaped component 6; the height of the box-shaped component 6 is greater than that of the shaping top plate 1 and the shaping bottom plate 2; the height of the box-type component 6 is larger than the distance from the back side to the front side of the shaping top plate 1 and the shaping bottom plate 2;
step 4, adjusting the thickness of the carbon fiber cloth of the box-shaped assembly
Placing the box-shaped assemblies 6 between the adjacent limiting grooves 4 of the shaping top plate 1 or the shaping bottom plate 2 one by one, fixing the lower bottom surfaces of the box-shaped assemblies 6 on the shaping supporting edges 3, and attaching the back surfaces of the box-shaped assemblies 6 to the shaping top plate 1 or the shaping bottom plate 2; a limiting flat plate 7 is inserted into the limiting groove 4 on one side of the box-shaped component 6; if the limiting flat plate 7 can be inserted into the limiting groove 4 on the other side and the gap between the limiting flat plate 7 and the outer side of the box-shaped component 6 reaches a preset gap value, finishing shaping, otherwise, adjusting the thickness of the carbon fiber cloth on the outer side of the box-shaped component 6 until the limiting flat plate 7 can be inserted into the limiting grooves 4 on the two sides of the box-shaped component 6 and the gap between the limiting flat plate 7 and the outer side of the box-shaped component 6 reaches the preset gap value; completing the shaping of all the box-type components 6;
step 5, sewing the adjacent surfaces of the box-shaped part 5
Respectively sewing adjacent surfaces of adjacent box-shaped parts 5 in the box-shaped component 6 by using carbon fibers, and enabling two needles of carbon fibers to penetrate through holes of each box-shaped part 5;
Wrapping and fixing a plurality of layers of carbon fiber cloth on 2 side walls and the lower bottom surface outside the box-shaped component 6, wherein the edge of the carbon fiber cloth is 6mm higher than that of the box-shaped component;
Installing the box-shaped assemblies 6 processed in the step 6 in a shaping tool, wherein each box-shaped assembly 6 is fixed on a shaping support edge 3 of the shaping tool;
Sewing the adjacent surfaces of the adjacent box-shaped components 6 by using carbon fibers respectively, and enabling the holes of the box-shaped components 5 matched with the holes to penetrate through two needles of carbon fibers; then the shaping top plate 1 and the shaping bottom plate 2 are removed, all the box-shaped assemblies 6 jointly form a prefabricated body 9 with the same inner shape as that of the shaping tool, the part corresponding to the shaping top plate 1 is an arched part of the prefabricated body 9, and the part corresponding to the shaping bottom plate 2 is a horizontal part;
step 9, flanging treatment
Step 9.1, respectively installing flanging pressing plates 8 on the upper bottom surface and the lower bottom surface of the outer side of the prefabricated body 9;
step 9.2, wrapping and fixing a plurality of layers of carbon fiber cloth on the side surface of the prefabricated body 9, wherein the edge of the carbon fiber cloth is higher than the side surface of the prefabricated body 9;
9.3, successively removing the flanging pressing plates 8 on the upper bottom surface and the lower bottom surface of the prefabricated part 9, turning down the carbon fiber cloth to the bottom surface of the prefabricated part 9 layer by layer, cutting off the carbon fiber cloth at the joint of the horizontal part and the arched part of the prefabricated part 9 when turning down, laying a layer of carbon fiber whole cloth on each layer of turned carbon fiber cloth until the uppermost layer of carbon fiber whole cloth is laid after all the carbon fiber cloth is turned down;
step 9.4, sewing the upper bottom surface and the lower bottom surface of each box-shaped component 6 in the prefabricated part 9 by using carbon fibers, and enabling two needles of carbon fibers to penetrate through holes of each box-shaped component 5 matched with the holes;
step 10, serging
The carbon fiber cloth in the preform 9 protruding out of the opening in the box-shaped part 5 is subjected to overlocking.
EXAMPLE III
The forming method of the C/SiC composite material structural part using the shaping tool comprises the following steps:
Taking a plurality of box-shaped parts 5 with upper openings, and punching holes on each side wall of each box-shaped part 5 with a connection relation, wherein the hole diameter is 6mm, and the hole center distance is 10 mm;
The outer wall of each box-shaped piece 5 is wrapped with a plurality of layers of carbon fiber cloth, and the edge of the carbon fiber cloth is 10mm higher than the upper surface of each box-shaped piece 5;
Placing at least two box-shaped parts 5 in the same direction, and fixing the adjacent surfaces of every two adjacent box-shaped parts 5 to form a box-shaped component 6; the height of the box-shaped component 6 is greater than that of the shaping top plate 1 and the shaping bottom plate 2;
step 4, adjusting the thickness of the carbon fiber cloth of the box-shaped assembly
Placing the box-shaped assemblies 6 between the adjacent limiting grooves 4 of the shaping top plate 1 or the shaping bottom plate 2 one by one, fixing the lower bottom surfaces of the box-shaped assemblies 6 on the shaping supporting edges 3, and attaching the back surfaces of the box-shaped assemblies 6 to the shaping top plate 1 or the shaping bottom plate 2; a limiting flat plate 7 is inserted into the limiting groove 4 on one side of the box-shaped component 6; if the limiting flat plate 7 can be inserted into the limiting groove 4 on the other side and the gap between the limiting flat plate 7 and the outer side of the box-shaped component 6 reaches a preset gap value, finishing shaping, otherwise, adjusting the thickness of the carbon fiber cloth on the outer side of the box-shaped component 6 until the limiting flat plate 7 can be inserted into the limiting grooves 4 on the two sides of the box-shaped component 6 and the gap between the limiting flat plate 7 and the outer side of the box-shaped component 6 reaches the preset gap value; completing the shaping of all the box-type components 6;
step 5, sewing the adjacent surfaces of the box-shaped part 5
Respectively sewing adjacent surfaces of adjacent box-shaped parts 5 in the box-shaped component 6 by using carbon fibers, and enabling two needles of carbon fibers to penetrate through holes of each box-shaped part 5;
Wrapping and fixing a plurality of layers of carbon fiber cloth on 2 side walls and the lower bottom surface outside the box-shaped component 6, wherein the edge of the carbon fiber cloth is 5mm higher than that of the box-shaped component;
Installing the box-shaped assemblies 6 processed in the step 6 in a shaping tool, wherein each box-shaped assembly 6 is fixed on a shaping support edge 3 of the shaping tool;
Sewing the adjacent surfaces of the adjacent box-shaped components 6 by using carbon fibers respectively, and enabling the holes of the box-shaped components 5 matched with the holes to penetrate through two needles of carbon fibers; then the shaping top plate 1 and the shaping bottom plate 2 are removed, all the box-shaped assemblies 6 jointly form a prefabricated body 9 with the same inner shape as that of the shaping tool, the part corresponding to the shaping top plate 1 is an arched part of the prefabricated body 9, and the part corresponding to the shaping bottom plate 2 is a horizontal part;
step 9, flanging treatment
Step 9.1, respectively installing flanging pressing plates 8 on the upper bottom surface and the lower bottom surface of the outer side of the prefabricated body 9;
step 9.2, wrapping and fixing a plurality of layers of carbon fiber cloth on the side surface of the prefabricated body 9, wherein the edge of the carbon fiber cloth is higher than the side surface of the prefabricated body 9;
9.3, successively removing the flanging pressing plates 8 on the upper bottom surface and the lower bottom surface of the prefabricated part 9, turning down the carbon fiber cloth to the bottom surface of the prefabricated part 9 layer by layer, cutting off the carbon fiber cloth at the joint of the horizontal part and the arched part of the prefabricated part 9 when turning down, laying a layer of carbon fiber whole cloth on each layer of turned carbon fiber cloth until the uppermost layer of carbon fiber whole cloth is laid after all the carbon fiber cloth is turned down;
step 9.4, sewing the upper bottom surface and the lower bottom surface of each box-shaped component 6 in the prefabricated part 9 by using carbon fibers, and enabling two needles of carbon fibers to penetrate through holes of each box-shaped component 5 matched with the holes;
step 10, serging
The carbon fiber cloth in the preform 9 protruding out of the opening in the box-shaped part 5 is subjected to overlocking.
After the forming, the shaping tool can be installed outside the prefabricated part 9 repeatedly, the fit clearance between the prefabricated part and the shaping tool is ensured to be less than or equal to 0.15mm, and SiC deposition is carried out on the prefabricated part 9 by adopting a CVI (chemical vapor infiltration) process and the like.
The molding method comprises the following steps: the box-shaped parts 5 are made of graphite; the density of the holes in the step 1 is not too sparse, and the holes are not easy to deposit if the density is too sparse; when the carbon fiber cloth is wrapped in the steps, the wrapping layer number of the carbon fiber cloth can be selectively adjusted according to the processing requirement; the carbon fiber cloth higher than the box-shaped component 6 is removed if burrs exist in the processing process, so that the influence on the subsequent process is avoided.
The box-shaped part 5 and the box-shaped component 6 are equivalent to a forming die in the forming process and are used for supporting and shaping the carbon fiber cloth in the forming process.
The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to other related technical fields, are included in the scope of the present invention.
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| CN114474312B (en) * | 2021-12-22 | 2024-04-30 | 西安鑫垚陶瓷复合材料股份有限公司 | Cylindrical structural member mold and method for manufacturing cylindrical structural member |
| CN117945772A (en) * | 2023-12-28 | 2024-04-30 | 西安鑫垚陶瓷复合材料股份有限公司 | A ceramic-based composite material annular flange component and preparation method and tooling |
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| US8795567B2 (en) * | 2010-09-23 | 2014-08-05 | The Boeing Company | Method for fabricating highly contoured composite stiffeners with reduced wrinkling |
| CN104723571B (en) * | 2015-03-16 | 2016-10-05 | 天津工业大学 | The method of sewing of a kind of carbon fiber cell type prefabricated component and shaper |
| CN108162430B (en) * | 2017-12-06 | 2020-03-24 | 航天材料及工艺研究所 | Method for forming special-shaped composite material grid skin cabin section |
| CN108819287B (en) * | 2018-04-25 | 2020-02-14 | 西安飞机工业（集团）有限责任公司 | Forming device and forming method of reinforced wall plate assembly |
| CN109648884B (en) * | 2018-12-19 | 2021-06-08 | 雷可德高分子（天津）有限公司 | Forming process of prepreg/SMC composite material |
| CN110480884B (en) * | 2019-08-22 | 2022-06-24 | 中国商用飞机有限责任公司北京民用飞机技术研究中心 | Mold, method for manufacturing assembled preformed structure and method for manufacturing wallboard structure |
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