A kind of high temperature modified post-forming tool and method for ceramic matrix composite nozzle components

Abstract

The present invention relates to a post-high-temperature modification profiling tool and method for a ceramic-based composite nozzle component, in order to solve the technical problem that the C / SiC ceramic-based composite nozzle produces radial deformation after high-temperature modification treatment, resulting in the dimensional index not meeting the design requirements. The tool comprises a base plate, a positioning ring and a plurality of component fixing devices arranged on the base plate, a plurality of equal-height support seats uniformly distributed circumferentially with the center of the positioning ring as the center, and a reference ring arranged at the upper end of the support seat; the side wall of the reference ring is uniformly penetrated with a plurality of top screws along the circumferential direction. The method comprises: assembling the tool; determining the maximum and minimum diameter positions; adjusting the top screws to an outer diameter size difference of ≤0.2mm, recording the current maximum diameter D1 and minimum diameter D2; continuing to adjust the top screws to D1-(0.5-1.0)mm at the maximum diameter and D2+(0.5-1.0)mm at the minimum diameter; removing the tool and performing deposition.

Description

Technical Field

[0001] The invention relates to a tool and method for calibrating a ceramic-based composite nozzle component, and in particular to a tool and method for calibrating a ceramic-based composite nozzle component after high-temperature modification. Background Art

[0002] Continuous fiber reinforced silicon carbide ceramic matrix composite material is an ideal high temperature resistant structural material with excellent properties such as high temperature resistance, high specific strength, low density, ablation resistance, high specific modulus, and oxidation resistance. It is a lightweight composite material that combines structural load-bearing and resistance to harsh environments. It has great application potential in the fields of aviation engines, satellite attitude control engines, hypersonic ramjet engines, and solid rocket engines. In recent years, due to the development needs of hypersonic aircraft, C / SiC ceramic matrix composite nozzles have been widely used. In terms of component function, C / SiC ceramic matrix composite nozzles can convert the energy of high temperature and high pressure gas generated by the combustion chamber of the aircraft engine into kinetic energy through the nozzle to obtain the expected thrust. To increase the thrust of the engine, the focus is on increasing the operating temperature of the engine components and reducing the structural weight.

[0003] At present, most C / SiC ceramic matrix composite nozzles adopt large-size, thin-walled, and rotary structures. Due to the performance requirements and particularity of the preparation process of C / SiC ceramic matrix composite nozzles, in addition to multiple chemical vapor deposition (CVI-SiC, CVI-PyC) during its production process, high-temperature modification (RMI) is also an important process that affects the performance of C / SiC ceramic matrix composite nozzles. After RMI treatment, the large-mouth end of the C / SiC ceramic matrix composite nozzle will produce severe radial deformation. Based on C / SiC ceramic matrix composites, the deformation is generally elliptical; since the ceramic matrix composite components after modification are in a high-density (density ≥ 2.0g / cm3) state, they have high brittleness and rigidity, and cannot be calibrated using traditional calibration methods. In order to solve the radial deformation of the C / SiC ceramic matrix composite nozzle after high-temperature modification (RMI), it is necessary to design a calibration tooling after high-temperature modification (RMI) to avoid the dimensional indicators not meeting the design requirements due to severe deformation of the C / SiC ceramic matrix composite nozzle. Summary of the invention

[0004] The present invention aims to solve the technical problem that radial deformation of a C / SiC ceramic matrix composite nozzle occurs after high-temperature modification, resulting in dimensional indicators not meeting design requirements, and proposes a tooling and method for shaping a ceramic matrix composite nozzle component after high-temperature modification.

[0005] The technical solution of the present invention is:

[0006] A high temperature modified post-forming tool for ceramic matrix composite nozzle components, which is special in that:

[0007] Including normal temperature calibration tooling;

[0008] The normal temperature profiling tooling comprises a base plate, a positioning ring fixedly arranged on the base plate and a plurality of component fixing devices, a plurality of support seats of equal height uniformly distributed circumferentially with the center of the positioning ring as the center, and a reference ring arranged at the upper end of the support seat and fixedly connected to the support seat;

[0009] The size of the positioning ring matches the size of the small end of the ceramic matrix composite nozzle component and is used to position the small end of the ceramic matrix composite nozzle component;

[0010] The component fixing device is arranged on the outside of the positioning ring and is used to fix the small-mouth end of the ceramic-based composite material nozzle component on the positioning ring;

[0011] The side wall of the reference ring is evenly provided with a plurality of top screws along the circumferential direction, and the top screws are used to abut against the outer side wall of the large mouth end of the ceramic-based composite nozzle component;

[0012] The normal temperature profiling tool further comprises an arc-shaped gasket, which is adapted to the shape of the outer side wall of the ceramic-based composite nozzle component, and is used to cushion the relative position between the outer side surface of the ceramic-based composite nozzle component and the top screw when the normal temperature profiling tool and the ceramic-based composite nozzle component are installed;

[0013] The inner diameter of the reference ring is larger than the long diameter of the large-mouth end of the ceramic-based composite nozzle component after deformation.

[0014] Furthermore, the component fixing device is evenly distributed on the outer side of the positioning ring in the circumferential direction with the center of the positioning ring as the center;

[0015] The component fixing device includes a pad, a pressure plate and a fixing piece;

[0016] The cushion block is fixedly connected to the bottom plate, and a step is arranged on the cushion block, and the step is located on the inner side of the cushion block; one end of the pressing plate abuts against the step, and the other end is used to press and cover the positioning ring and the small end of the ceramic matrix composite nozzle component together;

[0017] The fixing piece is arranged on the bottom plate and connected with the pressing plate.

[0018] Furthermore, the fixing member is a screw and a nut, the lower end of the screw is arranged on the bottom plate; a waist-shaped hole is provided through the pressing plate, the screw passes through the waist-shaped hole and is connected to the nut;

[0019] The positioning ring is provided with a positioning pin shaft, which cooperates with a positioning hole provided at the small end of the ceramic-based composite material nozzle component to realize the positioning and installation of the small end of the ceramic-based composite material nozzle component.

[0020] Furthermore, the normal temperature shaping tooling is made of stainless steel or carbon steel.

[0021] Further, it also includes a deposition profiling tool;

[0022] The deposition profiling tooling comprises a cross joint, a support plate fixedly connected to four joint sections of the cross joint, and a graphite support head detachably arranged at the end of the support plate;

[0023] The upper end of the graphite support head is provided with a connecting boss, which is used to overlap the upper surface of the ceramic-based composite nozzle component;

[0024] The graphite support head has a profiled end surface, which is used to match the inner side surface of the ceramic-based composite material nozzle component, and a gas permeable groove is arranged on the profiled end surface.

[0025] Furthermore, the cross joint and the support plate are made of C / SiC ceramic-based composite materials, and the graphite support head is made of high-purity graphite.

[0026] Further, the support plate includes two sub-support plates, the two sub-support plates are clamped on both sides of the joint section of the cross joint and fixed by stud bolts made of C / SiC material, and the two corresponding sub-support plates are connected by pins made of C / SiC material;

[0027] The graphite support head is connected to the ends of the two corresponding sub-support plates through graphite stud bolts.

[0028] At the same time, the present invention also provides a method for shaping a ceramic-based composite nozzle component after high-temperature modification, which is special in that the above-mentioned ceramic-based composite nozzle component shaping tool after high-temperature modification is used, and the method includes the following steps:

[0029] S1. Obtaining a ceramic-based composite nozzle component to be calibrated after high-temperature modification treatment;

[0030] S2, fix the small-mouth end of the ceramic-based composite nozzle component to the bottom plate through a positioning ring and a plurality of component fixing devices, and complete the connection with the normal temperature profiling tooling;

[0031] S3, adjusting each top screw, when the top screw reaches the preset position, bonding the arc-shaped gasket to the position corresponding to the top screw on the outer side surface of the ceramic-based composite nozzle component, and measuring the maximum diameter and the minimum diameter of the large-mouth end of the ceramic-based composite nozzle component, and determining the maximum diameter mark position and the minimum diameter mark position;

[0032] S4, adjusting the top screw corresponding to the maximum diameter mark position on the reference ring, so that the top screw end abuts against the arc-shaped gasket and applies pressure; continue to adjust the top screws corresponding to the maximum diameter mark position and the minimum diameter mark position until the outer diameter size difference of the large-mouth end of the ceramic-based composite nozzle component is ≤0.2mm, and record the maximum diameter D1 and the minimum diameter D2 of the large-mouth end of the ceramic-based composite nozzle component in the current state;

[0033] S5, continue to adjust the top screws corresponding to the maximum diameter mark position and the minimum diameter mark position, so that the maximum diameter of the large-mouth end of the final ceramic-based composite nozzle component is calibrated to D1′=D1-(0.5-1.0) mm, and the minimum diameter is calibrated to D2′=D2+(0.5-1.0) mm; adjust the remaining top screws so that each top screw is in contact with the arc-shaped gasket;

[0034] S6. Remove the normal temperature shaping tooling to complete the shaping of the ceramic-based composite nozzle components after high temperature modification.

[0035] Furthermore, after step S5, step S5a is also included, installing a deposition profiling tool:

[0036] S5a, according to the size after profiling in step S5, determine and process the profiling end surface shape and size of the four graphite support heads in the deposition profiling tooling; assemble the deposition profiling tooling on the inner side of the large mouth end of the ceramic matrix composite nozzle component, and overlap the connecting boss on the upper surface of the large mouth end of the ceramic matrix composite nozzle component;

[0037] In step S6, the specific process of removing the normal temperature profiling tooling is as follows:

[0038] The top screw of the normal temperature profiling tool is loosened to separate the top screw from the arc-shaped gasket, and the maximum diameter D1s and the minimum diameter D2s of the large mouth end of the current ceramic-based composite nozzle component are measured. If |D1s-D1′︳≤0.3mm and |D2s-D2′︳≤0.3mm, the normal temperature profiling tool is removed to complete the profiling of the ceramic-based composite nozzle component after high temperature modification; if |D1s-D1′︳>0.3mm and / or |D2s-D2′︳>0.3mm, the deposition profiling tool is removed, the top screw is tightened, and the step S5 is returned to adjust the sizes of D1′ and D2′ until |D1s-D1′︳≤0.3mm and |D2s-D2′︳≤0.3mm, the normal temperature profiling tool is removed to complete the profiling of the ceramic-based composite nozzle component after high temperature modification.

[0039] Further, in step S5a, the connection boss overlaps the upper surface of the ceramic matrix composite nozzle component, specifically, graphite paper is arranged between the connection boss and the upper surface of the ceramic matrix composite nozzle component.

[0040] Beneficial effects of the present invention:

[0041] 1. The room temperature profiling tool provided by the present invention fixes the small end of the nozzle component through the positioning ring and the component fixing device on the bottom plate, so that the radial deformation area of ​​the nozzle component is adjusted and shaped using the top screw on the reference ring. The ceramic-based composite nozzle component within a certain range can be shaped by adjusting the length of the top screw, thereby improving the versatility and repeated utilization rate of the room temperature profiling tool.

[0042] 2. In the deposition profiling tooling provided by the present invention, the cross joint and the support plate are universal structures, both of which use the same C / SiC ceramic-based composite material as the nozzle components, which solves the problem of tooling failure in a high-temperature deposition environment and the problem of thermal expansion mismatch between the profiling tooling and the C / SiC ceramic-based composite material components in a high-temperature environment, and also realizes the universalization and lightweight of the tooling.

[0043] 3. In the deposition profiling tooling provided by the present invention, the graphite support head serves as a detachable and replaceable part. The parts made of high-purity graphite are adjusted according to the size of the profiling object, thereby realizing the reuse of the universal structure of the cross joint and the support plate, effectively saving costs. At the same time, compared with C / SiC ceramic-based composite materials, the preparation process of the graphite support head is simple and convenient.

[0044] 4. The shaping method provided by the present invention not only eliminates the internal stress in the nozzle component again, but also enables effective deposition on the surface of the nozzle component, thereby greatly improving the dimensional stability of the nozzle component after shaping. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a schematic diagram of a normal temperature profiling tooling in an embodiment of a profiling tooling for a ceramic-based composite nozzle component after high temperature modification according to the present invention;

[0046] Figure 2 It is a schematic diagram of the assembly structure of the normal temperature shaping tool and the nozzle component in the embodiment of the shaping tool after high temperature modification of the ceramic-based composite nozzle component of the present invention;

[0047] Figure 3 It is a schematic diagram of a deposition shaping tooling in an embodiment of a shaping tooling after high temperature modification of a ceramic-based composite nozzle component of the present invention;

[0048] Figure 4 It is a schematic diagram of the assembly structure of the deposition profiling tooling and the nozzle component in the embodiment of the profiling tooling after high-temperature modification of the ceramic-based composite nozzle component of the present invention.

[0049] The reference numerals are as follows:

[0050] 1-normal temperature calibration tool, 101-base plate, 102-positioning ring, 103-support seat, 104-reference ring, 105-top screw, 107-fastening screw, 108-positioning pin, 109-spacer, 110-pressing plate, 111-screw, 112-nut, 2-deposition calibration tool, 201-cross joint, 202-support plate, 203-graphite support head, 204-connecting boss, 205-air permeable groove, 206-stud bolt, 207-pin, 208-graphite stud bolt, 3-ceramic matrix composite nozzle component. DETAILED DESCRIPTION

[0051] In this embodiment, the maximum diameter marking position refers to taking the two ends of the maximum diameter as the center, and taking a suitable distance along the circumferential direction to achieve adjustment of the large end of the ceramic-based composite material nozzle component 3; the minimum diameter marking position refers to taking the two ends of the minimum diameter as the center, and taking a suitable distance along the circumferential direction to achieve adjustment of the large end of the ceramic-based composite material nozzle component 3; the center position close to the positioning ring 102 or the cross joint 201 is the inner position, and the center position far from the positioning ring 102 or the cross joint 201 is the outer position.

[0052] This embodiment provides a shaping tool for a ceramic-based composite nozzle component 3 after high-temperature modification, and the shaping tool includes a normal-temperature shaping tool 1 and a deposition shaping tool 2 .

[0053] The normal temperature calibration tool 1 is made of stainless steel or carbon steel, and includes a base plate 101, a positioning ring 102 fixedly arranged on the base plate 101 and four component fixing devices, three support seats 103 evenly distributed circumferentially with the center of the positioning ring 102 as the center, and a reference ring 104 arranged at the upper end of the support seat 103 and fixedly connected to the support seat 103. The support seat 103 is fixedly connected to the base plate 101 by a fastening screw 107.

[0054] The size of the positioning ring 102 matches the size of the small end of the ceramic matrix composite nozzle component 3 , and a positioning pin 108 is provided thereon. The positioning pin 108 is used to achieve positioning and installation of the small end of the ceramic matrix composite nozzle component 3 .

[0055] The component fixing device is evenly distributed on the outer side of the positioning ring 102 with the center of the positioning ring 102 as the center, and is used to fix the small end of the ceramic-based composite material nozzle component 3; the component fixing device includes a pad 109, a pressing plate 110 and a fixing member; the pad 109 is fixedly connected to the base plate 101, and a step is provided on the pad 109, which is located on the inner side of the pad 109; one end of the pressing plate 110 is set on the step, and the other end is used to press and fix the small end of the ceramic-based composite material nozzle component 3; the fixing member is a screw 111 and a nut 112, and the lower end of the screw 111 is set on the base plate 101; a waist-shaped hole is penetrated on the pressing plate 110, and the screw 111 passes through the waist-shaped hole and is connected to the nut 112; the setting of the waist-shaped hole can make the fixing position of the pressing plate 110 adjusted according to the size of the small end of the nozzle component, so that the tooling is suitable for ceramic-based composite material nozzle components 3 of a certain size range.

[0056] The reference ring 104 can be an integrally processed structure, or a standard circular ring structure formed by fixing a plurality of sector segments together; 18 M10 top screws 105 are evenly arranged on the side wall of the reference ring 104 along the circumferential direction, and the top screws 105 are used to abut against the outer wall of the large end of the ceramic-based composite nozzle component 3.

[0057] The normal temperature profiling tool 1 also includes an arc-shaped gasket, which is adapted to the shape of the outer wall of the ceramic-based composite material nozzle component 3. The arc-shaped gasket is used to pad the relative position of the outer side surface of the ceramic-based composite material nozzle component 3 and the top screw 105 when the normal temperature profiling tool 1 and the ceramic-based composite material nozzle component 3 are installed; the inner diameter of the reference ring 104 is larger than the long diameter of the large mouth end of the ceramic-based composite material nozzle component 3 after deformation.

[0058] The deposition profiling tool 2 includes a cross joint 201, a support plate 202 fixedly connected to the four joint sections of the cross joint 201, and a graphite support head 203 detachably arranged at the end of the support plate 202; wherein the cross joint 201 and the support plate 202 are used as a common structure, and a density of ≥1.85g / cm 3 The C / SiC material can solve the problem of tooling failure in a high-temperature deposition environment on the one hand, and can solve the problem of thermal expansion mismatch caused by material differences in a high-temperature environment on the other hand; the graphite support head 203 is made of high-purity graphite, and the graphite support head 203 is a detachable part. The parts made of high-purity graphite can be adjusted according to the size of the proofreading object, thereby realizing the reuse of tooling and effectively saving costs.

[0059] The support plate 202 includes two sub-support plates, which are clamped on both sides of the joint section of the cross joint 201 and fixed by stud bolts 206 made of C / SiC material. The two corresponding sub-support plates are connected by pins 207 made of C / SiC material. The support plate 202 is provided with a plurality of rectangular through holes penetrating the support plate 202, which is beneficial to reducing the weight of the deposition profiling tooling 2. In other embodiments, the through holes can be other shapes. Considering that C / SiC material is used, it is more convenient to set rectangular through holes.

[0060] The graphite support head 203 is connected to the ends of the two corresponding sub-support plates by using graphite stud bolts 208; a connecting boss 204 is provided at the upper end of the graphite support head 203, and the connecting boss 204 is used to overlap the upper surface of the ceramic-based composite nozzle component 3, and graphite paper is provided on the contact surface of the two to prevent adhesion to the ceramic-based composite nozzle component 3 when the tooling is disassembled.

[0061] The graphite support head 203 has a shaping end face, which is matched with the inner side of the ceramic-based composite nozzle component 3, and is provided with a breathable groove 205 extending circumferentially along the central axis. The design of the breathable groove 205 ensures that effective deposition can also be obtained in the contact area between the nozzle component surface and the shaping tooling.

[0062] The method for shaping the ceramic matrix composite nozzle component 3 after high temperature modification by using the shaping tool comprises the following steps:

[0063] S1. Obtain a ceramic-based composite nozzle component 3 to be calibrated after high-temperature modification.

[0064] S2, fix the small-mouth end of the ceramic-based composite nozzle component 3 on the bottom plate 101 through the positioning ring 102 and a plurality of component fixing devices, and complete the connection with the normal temperature profiling tooling 1.

[0065] S3, adjust each top screw 105, the model of the top screw 105 is M10, and pause when the top screw 105 is 5 mm away from the ceramic-based composite nozzle component 3, and use double-sided tape to bond the arc-shaped gasket to the outer side of the ceramic-based composite nozzle component 3 to ensure that the arc-shaped gasket is completely fitted with the outer side of the nozzle component; the position of the arc-shaped gasket corresponds to the top screw 105, and the maximum diameter and the minimum diameter of the large-mouth end of the ceramic-based composite nozzle component 3 are measured to determine the maximum diameter mark position and the minimum diameter mark position.

[0066] S4. Adjust the top screw 105 corresponding to the maximum diameter mark position on the reference ring 104 so that the end of the top screw 105 abuts against the arc-shaped gasket and applies pressure; continue to adjust the top screws 105 corresponding to the maximum diameter mark position and the minimum diameter mark position until the difference in the outer diameter size of the large end of the ceramic-based composite nozzle component 3 is ≤0.2mm, and record the maximum diameter D1 and the minimum diameter D2 of the large end of the ceramic-based composite nozzle component 3 in the current state.

[0067] S5. Continue to adjust the top screws 105 corresponding to the maximum diameter marking position and the minimum diameter marking position, so that the maximum diameter of the large-mouth end of the final ceramic-based composite nozzle component 3 is calibrated to D1′=D1-(0.5~1.0)mm, and the minimum diameter is calibrated to D2′=D2+(0.5~1.0)mm; adjust the remaining top screws 105 so that each top screw 105 is in contact with the arc-shaped gasket.

[0068] S6. According to the dimensions after profiling in step S5, determine and process the profiling end face shapes and dimensions of the four graphite support heads 203 in the deposition profiling tool 2; assemble the deposition profiling tool 2 on the inner side of the large end of the ceramic-based composite material nozzle component 3, overlap the connecting boss 204 on the upper surface of the large end of the ceramic-based composite material nozzle component 3, and arrange graphite paper between the connecting boss 204 and the upper surface of the large end of the ceramic-based composite material nozzle component 3 to prevent adhesion to the ceramic-based composite material nozzle component 3 when the tool is disassembled.

[0069] S7, loosen the top screw 105 of the room temperature profiling tool 1, separate the top screw 105 from the arc-shaped gasket, measure the maximum diameter D1s and the minimum diameter D2s of the large mouth end of the current ceramic-based composite nozzle component 3, if |D1s-D1′︳≤0.3mm and |D2s-D2′︳≤0.3mm, remove the room temperature profiling tool 1, and complete the profiling of the ceramic-based composite nozzle component 3 after high temperature modification; if |D1s-D1′︳>0.3mm and / or |D2s-D2′︳>0.3mm, remove the deposition profiling tool 2, Start tightening the top screw 105, return to step S5, and adjust the sizes of D1′ and D2′ until |D1s-D1′︳≤0.3mm and |D2s-D2′︳≤0.3mm, remove the room temperature shaping tool 1, and complete the shaping of the ceramic-based composite material nozzle component 3 after high-temperature modification; perform deposition processing on the shaped ceramic-based composite material nozzle component 3; during the deposition process, the ceramic-based composite material nozzle component 3 equipped with the deposition shaping tool 2 is placed with the large end facing upward in the deposition furnace for CVI-SiC chemical vapor deposition processing.

[0070] The shaping tool and shaping method provided in this embodiment are used for tail nozzle components. After the modification treatment, they are subjected to room temperature shaping treatment, and after shaping by the deposition tool during the deposition process, the deformation of the tail nozzle components is effectively improved.

Claims

1. A high temperature modified post-forming tool for a ceramic matrix composite nozzle component, characterized in that: It comprises a normal temperature profiling tool (1) and a deposition profiling tool (2); The normal temperature profiling tool (1) comprises a base plate (101), a positioning ring (102) fixedly arranged on the base plate (101) and a plurality of component fixing devices, a plurality of support seats (103) uniformly distributed in the circumferential direction with the center of the positioning ring (102) as the center, and a reference ring (104) arranged at the upper end of the support seat (103) and fixedly connected to the support seat (103); The size of the positioning ring (102) matches the size of the small end of the ceramic-based composite material nozzle component (3) and is used to position the small end of the ceramic-based composite material nozzle component (3); The component fixing device is arranged on the outside of the positioning ring (102) and is used to fix the small-mouth end of the ceramic-based composite material nozzle component (3) on the positioning ring (102); A plurality of top screws (105) are evenly arranged through the side wall of the reference ring (104) in the circumferential direction, and the top screws (105) are used to abut against the outer side wall of the large opening end of the ceramic-based composite material nozzle component (3); The normal temperature profiling tool (1) further comprises an arc-shaped gasket, which is adapted to the shape of the outer wall of the ceramic-based composite material nozzle component (3), and is used to cushion the relative position between the outer side surface of the ceramic-based composite material nozzle component (3) and the top screw (105) when the normal temperature profiling tool (1) and the ceramic-based composite material nozzle component (3) are installed. The inner diameter of the reference ring (104) is larger than the long diameter of the large-mouth end of the ceramic-based composite nozzle component (3) after deformation; The deposition profiling tool (2) comprises a cross joint (201), a support plate (202) respectively fixedly connected to four joint sections of the cross joint (201), and a graphite support head (203) detachably arranged at the end of the support plate (202); The upper end of the graphite support head (203) is provided with a connecting boss (204), and the connecting boss (204) is used to overlap the upper surface of the large mouth end of the ceramic-based composite material nozzle component (3); The graphite support head (203) has a profiled end surface, the profiled end surface is used to match the inner side surface of the ceramic-based composite material nozzle component (3), and a venting groove (205) is provided on the profiled end surface; The cross joint (201) and the support plate (202) are made of C / SiC ceramic-based composite materials, and the graphite support head (203) is made of high-purity graphite; The support plate (202) comprises two sub-support plates, the two sub-support plates are clamped on both sides of the joint section of the cross joint (201), and are fixed by stud bolts (206) made of C / SiC material, and the two corresponding sub-support plates are connected by pins (207) made of C / SiC material; The graphite support head (203) is connected to the ends of the two corresponding sub-support plates via graphite stud bolts (208).

2. The high temperature modified post-forming tooling for ceramic matrix composite nozzle components according to claim 1, characterized in that: The component fixing device is evenly distributed on the outer side of the positioning ring (102) in the circumferential direction with the center of the positioning ring (102) as the center; The component fixing device comprises a cushion block (109), a pressing plate (110) and a fixing member; The cushion block (109) is fixedly connected to the bottom plate (101), and a step is provided on the cushion block (109), and the step is located on the inner side of the cushion block (109); one end of the pressing plate (110) abuts against the step, and the other end is used to press and fix the positioning ring (102) and the small end of the ceramic-based composite nozzle component (3) together; The fixing member is arranged on the bottom plate (101) and is connected to the pressing plate (110).

3. The high temperature modified post-forming tooling for ceramic matrix composite nozzle components according to claim 2, characterized in that: The fixing member is a screw rod (111) and a nut (112), and the lower end of the screw rod (111) is arranged on the bottom plate (101); a waist-shaped hole is provided through the pressing plate (110), and the screw rod (111) passes through the waist-shaped hole and is connected to the nut (112); The positioning ring (102) is provided with a positioning pin (108), which cooperates with a positioning hole provided at the small end of the ceramic-based composite material nozzle component (3) to achieve positioning and installation of the small end of the ceramic-based composite material nozzle component (3).

4. The high temperature modified post-forming tooling for ceramic matrix composite nozzle components according to claim 3, characterized in that: The normal temperature shaping tool (1) is made of stainless steel or carbon steel.

5. A method for shaping a ceramic matrix composite nozzle component after high temperature modification, characterized in that: The high temperature modified post-forming tooling for the ceramic matrix composite nozzle component according to any one of claims 1 to 4 comprises the following steps: S1, obtaining a ceramic-based composite nozzle component (3) to be calibrated after high-temperature modification; S2, fixing the small-mouth end of the ceramic-based composite material nozzle component (3) on the bottom plate (101) through a positioning ring (102) and a plurality of component fixing devices, thereby completing the connection with the normal temperature profiling tooling (1); S3, adjusting each top screw (105), and when the top screw (105) reaches a preset position, bonding an arc-shaped gasket to a position corresponding to the top screw (105) on the outer side surface of the ceramic-based composite nozzle component (3), and measuring the maximum diameter and the minimum diameter of the large-mouth end of the ceramic-based composite nozzle component (3), and determining the maximum diameter mark position and the minimum diameter mark position; S4, adjusting the top screw (105) corresponding to the maximum diameter mark position on the reference ring (104) so ​​that the end of the top screw (105) abuts against the arc-shaped gasket and applies pressure; continuing to adjust the top screw (105) corresponding to the maximum diameter mark position and the minimum diameter mark position until the difference in the outer diameter of the large end of the ceramic-based composite nozzle component (3) is ≤0.2 mm, and recording the maximum diameter D1 and the minimum diameter D2 of the large end of the ceramic-based composite nozzle component (3) in the current state; S5, continue to adjust the top screws (105) corresponding to the maximum diameter mark position and the minimum diameter mark position, so that the maximum diameter of the large mouth end of the final ceramic-based composite nozzle component (3) is calibrated to D1′=D1-(0.5-1.0) mm, and the minimum diameter is calibrated to D2′=D2+(0.5-1.0) mm; adjust the remaining top screws (105) so that each top screw (105) is in contact with the arc-shaped gasket; S6. The normal temperature shaping tooling (1) is removed to complete the shaping of the ceramic-based composite nozzle component (3) after high temperature modification.

6. The method for shaping a ceramic matrix composite nozzle component after high temperature modification according to claim 5, characterized in that: After step S5, the method further includes step S5a, installing a deposition profiling tool (2): S5a, according to the size after profiling in step S5, determine and process the profiling end surface shape and size of the four graphite support heads (203) in the deposition profiling tool (2); assemble the deposition profiling tool (2) on the inner side of the large end of the ceramic-based composite nozzle component (3), and overlap the connecting boss (204) on the upper surface of the large end of the ceramic-based composite nozzle component (3); In step S6, the specific process of removing the normal temperature shaping tool (1) is as follows: The top screw (105) of the normal temperature shaping tool (1) is loosened to separate the top screw (105) from the arc-shaped gasket, and the maximum diameter D1s and the minimum diameter D2s of the large mouth end of the current ceramic-based composite nozzle component (3) are measured. If |D1s-D1′︳≤0.3mm and |D2s-D2′︳≤0.3mm, the normal temperature shaping tool (1) is removed to complete the shaping of the ceramic-based composite nozzle component (3) after high temperature modification; if | If D1s-D1′︳>0.3mm and / or |D2s-D2′︳>0.3mm, the deposition shaping tool (2) is removed, the top screw (105) is tightened, and the process returns to step S5, and the sizes of D1′ and D2′ are adjusted until |D1s-D1′︳≤0.3mm and |D2s-D2′︳≤0.3mm, and the normal temperature shaping tool (1) is removed to complete the shaping of the ceramic-based composite nozzle component (3) after high temperature modification.

7. The method for shaping a ceramic matrix composite nozzle component after high temperature modification according to claim 6, characterized in that: In step S5a, the connecting boss (204) is overlapped on the upper surface of the ceramic-based composite material nozzle component (3), specifically, graphite paper is arranged between the connecting boss (204) and the upper surface of the ceramic-based composite material nozzle component (3).

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