A clamping mechanism and processing method for a ceramic matrix composite pad.

Abstract

This disclosure provides a clamping mechanism for a ceramic matrix composite material pad, including a clamping base, a fixing plate, and a flexible pad. An arched support platform is protruded from the upper surface of the clamping base, and the support platform has an adsorption cavity inside. Multiple adsorption holes are arranged in an array on the surface of the support platform. The flexible pad is laid on the support platform, and its surface has multiple ventilation holes corresponding one-to-one with the adsorption holes. The lower surface of the fixing plate is recessed to form an arc-shaped groove matching the support platform. This disclosure also provides a processing method for the ceramic matrix composite material pad. The clamping mechanism for the ceramic matrix composite material pad provided by this disclosure, through the dual fixation of negative pressure adsorption and the fixing plate, combined with precise positioning by positioning columns, avoids component shaking during processing, ensuring processing accuracy. The flexible pad buffers rigid contact, disperses local stress, solves the problem of brittleness and easy cracking and breakage of ceramic matrix composite materials, and improves the yield rate.

Description

Technical Field

[0001] This disclosure relates to the field of aerospace technology, and in particular to a clamping mechanism and processing method for a ceramic matrix composite pad. Background Technology

[0002] Spacecraft structural components have stringent requirements for materials in terms of high temperature resistance, lightweight, corrosion resistance, and dielectric properties. Ceramic matrix composites, due to their excellent properties such as high temperature resistance (able to withstand extreme environments above 1500℃), high specific strength (density only 1 / 3 to 1 / 2 of that of metal materials), and low dielectric loss (suitable for the needs of aerospace electromagnetic equipment), are gradually replacing traditional metal materials and becoming the preferred material for spacecraft structural components.

[0003] Appendix Figure 1 A schematic diagram of a ceramic matrix composite material pad is shown. During processing, the pad requires drilling and grooving on its surface. However, the processing and clamping of this ceramic matrix composite material pad currently faces significant technical challenges: Firstly, the pads are mostly large-sized, thin-walled curved structures, while ceramic matrix composites have weak deformation resistance. The uniform pressure of traditional rigid clamping easily leads to warping, dents, and other dimensional deviations in the material, failing to meet the aerodynamic shape accuracy requirements of the pad. Secondly, the material exhibits significant brittleness, with fracture toughness only 1 / 8 to 1 / 12 that of metals. The rigid contact pressure of existing clamps easily causes localized stress concentration, leading to cracks or even breakage of the pad, significantly reducing the part yield.

[0004] Therefore, in order to meet the clamping requirements of ceramic matrix composite pads, there is an urgent need for a special clamping device that takes into account clamping stability, part protection and shape and position accuracy control, so as to solve the technical problems of easy breakage of pads and insufficient shape accuracy caused by existing fixtures. Summary of the Invention

[0005] The purpose of this disclosure is to provide a clamping mechanism and processing method for ceramic matrix composite material pads. The clamping mechanism uses a combination of negative pressure adsorption and a fixed pressure plate for double fixation, combined with positioning columns for precise positioning, to avoid component shaking during processing and ensure processing accuracy. The flexible pad buffers rigid contact, disperses local stress, solves the problem of brittleness and easy cracking and breakage of ceramic matrix composite materials, and improves the yield.

[0006] In a first aspect, this disclosure provides a clamping mechanism for a ceramic matrix composite material pad, including a clamping base, a fixed pressure plate, and a flexible pad; the upper surface of the clamping base is provided with an arched support platform, the inside of the support platform has an adsorption cavity, and the surface of the support platform is distributed with a plurality of adsorption holes arranged in an array; the plurality of adsorption holes are all connected to the adsorption cavity through air passages, and the side of the clamping base has a suction port connected to the adsorption cavity. The flexible pad is laid on the support platform, and its surface has a plurality of ventilation holes that correspond one-to-one with the adsorption holes; ceramic matrix composite material pads are placed on the flexible pad. The lower surface of the fixed pressure plate is recessed to form an arc-shaped groove that matches the support platform. The fixed pressure plate presses the ceramic matrix composite material pad onto the support platform through the wall of the arc-shaped groove.

[0007] In some preferred embodiments of this disclosure, the flexible pad is made of a viscoelastic polymer material with a hardness range of Shore A30-A60.

[0008] In this disclosure, a flexible liner with good viscoelasticity can buffer the rigid contact between the ceramic matrix composite pad and the support platform. On the other hand, it can automatically compensate for stress concentration caused by uneven shell wall thickness, preventing local breakage of the ceramic matrix composite pad. The hardness of the flexible liner is preferably in the Shore A30-A60 range. Too high or too low hardness will affect the supporting and buffering function of the flexible liner for the ceramic matrix composite pad.

[0009] In some preferred embodiments of this disclosure, the flexible pad is made of polyurethane elastomer, fluororubber, or silicone rubber. These materials have good elasticity and can provide sufficient support and cushioning for the ceramic matrix composite pad.

[0010] In some preferred embodiments of this disclosure, the clamping base is provided with limiting mounting seats at its four corners, and the fixing pressure plate is provided with connecting ears at its four corners accordingly; the connecting ears are locked to the limiting mounting seats by locking members.

[0011] In this disclosure, when the fixed pressure plate is placed on the clamping base, the connecting ears at the four corners are respectively placed on the limiting mounting seats, and then the connecting ears can be locked onto the limiting mounting seats by the locking components; and the tightness of the ceramic matrix composite material pad can be adjusted by adjusting the locking degree of the locking components.

[0012] In some preferred embodiments of this disclosure, the limiting mounting base is further provided with a positioning post, and the connecting ear is provided with a positioning hole that matches the positioning post.

[0013] In this disclosure, when the fixed pressure plate is placed on the clamping base, the positioning pin guides the fixed pressure plate, which can improve the positioning accuracy.

[0014] In some preferred embodiments of this disclosure, the lower surface of the clamping base and the upper surface of the fixing plate are both planes.

[0015] In this disclosure, the lower surface of the clamping base and the upper surface of the fixing plate are both set as planes, so that the front and back sides can be processed simultaneously after one clamping, avoiding damage to the ceramic matrix composite material pads caused by multiple clamping, as well as the impact of multiple clamping on the positioning accuracy of the ceramic matrix composite material pads.

[0016] In some preferred embodiments of this disclosure, both the clamping base and the fixed pressure plate are provided with multiple machining holes, and the flexible pad has a clearance hole in the area of ​​the machining hole on the clamping base.

[0017] In this disclosure, by setting machining holes and clearance holes, the ceramic matrix composite material pad can be machined with mounting holes and square holes on its front side and with grooves on its back side while in a clamped state, without the need for multiple clamping operations.

[0018] In some preferred embodiments of this disclosure, the width of the fixed pressure plate is smaller than the width of the support platform, and the two sides of the fixed pressure plate protrude to form a plurality of pressure blocks arranged at intervals, the lower surface of the pressure block being an arc-shaped surface adapted to the support platform.

[0019] In this disclosure, by setting multiple pressure blocks arranged at intervals, the edges of the ceramic matrix composite material pad can be pressed and fixed, preventing the two sides of the ceramic matrix composite material pad from shaking during drilling, which would not only affect the processing accuracy but also cause the ceramic matrix composite material pad to break.

[0020] The second aspect of this disclosure provides a method for processing a ceramic matrix composite material pad, comprising the following steps: S1. Lay the flexible pad on the support platform of the clamping base, and align the vent holes on the flexible pad with the adsorption holes on the support platform. S2. Place the ceramic matrix composite material pad to be processed on the flexible pad on the support platform, and then connect the suction port on the side of the clamping base to the pump body for suction, so that the ceramic matrix composite material pad is tightly attached to the flexible pad. S3. Place the fixed pressure plate on the support platform and lock the fixed pressure plate onto the clamping base using the locking device, thereby fixing the ceramic matrix composite material pad onto the clamping mechanism; S4. Cut the two sides of the ceramic matrix composite pad, drill holes in the area between two adjacent pressure blocks of the fixed pressure plate, and drill holes in the front of the ceramic matrix composite pad through the processing holes on the surface of the fixed pressure plate. S5. Flip the clamping mechanism so that the clamping base faces upward, and then perform grooving on the back of the ceramic matrix composite material pad through the machining holes on the surface of the clamping base.

[0021] In some preferred embodiments of this disclosure, in step S2, the vacuum level in the adsorption chamber is controlled to be -0.1 to -0.01 MPa by suction. If the vacuum level is lower than the range of -0.1 to -0.01 MPa, the adsorption force on the ceramic matrix composite pad is too small, resulting in poor adhesion between the ceramic matrix composite pad and the flexible liner.

[0022] This disclosure can achieve at least the following technical effects: 1. The clamping mechanism of the ceramic matrix composite material pad provided in this disclosure, through the negative pressure adsorption design of the arched support platform and array adsorption holes, combined with the automatic compensation function of the flexible pad, avoids the warping and denting caused by the uniform pressure of traditional rigid clamping, and meets the aerodynamic shape accuracy requirements of the pad.

[0023] 2. The clamping mechanism for the ceramic matrix composite material pad provided in this disclosure has strong clamping stability. The dual fixing of negative pressure adsorption and a fixed pressure plate, combined with precise positioning by positioning columns, prevents component shaking during processing and ensures processing accuracy. The flexible pad buffers rigid contact, disperses localized stress, and solves the problem of brittleness and easy cracking and breakage of ceramic matrix composite materials, thereby improving the yield rate.

[0024] 3. The clamping mechanism of the ceramic matrix composite material pad provided in this disclosure has machining holes in both the clamping base and the fixed pressure plate, and the flexible pad has clearance holes, which supports the completion of front and back processing (edge ​​cutting, front and back drilling / grooving) in one clamping, without the need for multiple clamping, reducing process and positioning errors. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the ceramic matrix composite material pad after processing in this disclosure; Figure 2 This is a schematic diagram of the overall structure of a clamping mechanism according to an embodiment of the present disclosure; Figure 3 for Figure 2 Schematic diagram of the structure of the clamping base; Figure 4 for Figure 2 Schematic diagram of the structure of the medium-flexible gasket; Figure 5 for Figure 2 Schematic diagram of the fixed pressure plate in the middle; Figure 6 for Figure 2 A schematic diagram of the structure after the clamping mechanism has been flipped. Among them: 100, ceramic matrix composite material pad; 110, mounting hole; 120, square hole; 200. Clamping base; 210. Support platform; 211. Adsorption hole; 220. Limiting mounting seat; 221. Positioning post; 222. Locking element; 230. Suction port; 300. Flexible gasket; 310. Vent hole; 320. Clearance hole; 400, Fixed pressure plate; 410, Arc groove; 420, Machining hole; 430, Connecting ear; 440, Pressure block. Detailed Implementation

[0026] The technical solutions of this disclosure will now be clearly and completely described in conjunction with the accompanying drawings and specific embodiments. Obviously, the described embodiments are merely some embodiments of this disclosure, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0027] Spacers are key external structural components of launch vehicles and spacecraft. Figure 1 The structure of the pad is shown. It is made of ceramic matrix composite material and is generally large in size, with an overall thin-walled curved surface structure. The processing and clamping of this type of pad made of ceramic matrix composite material faces significant technical challenges: on the one hand, the pads are mostly large-sized thin-walled curved surface structures, while ceramic matrix composite material has weak deformation resistance. The uniform pressure of traditional rigid clamping easily leads to warping, denting, and other dimensional deviations in the cover, failing to meet the aerodynamic shape accuracy requirements of the pad; on the other hand, the material has significant brittle characteristics, with a fracture toughness only 1 / 8 to 1 / 12 that of metals. The rigid contact pressure block 440 of existing fixtures easily causes local stress concentration, leading to cracks or even breakage of the pad, significantly reducing the part yield.

[0028] Therefore, in order to meet the clamping requirements of ceramic matrix composite pads, there is an urgent need for a special clamping device that takes into account clamping stability, part protection and shape and position accuracy control, so as to solve the technical problems of easy breakage of pads and insufficient shape accuracy caused by existing fixtures.

[0029] Please see Figure 2 This disclosure provides a clamping mechanism for ceramic matrix composite pads, including a clamping base 200, a fixed pressure plate 400, and a flexible pad 300.

[0030] Please see Figure 3 In one embodiment of this disclosure, the clamping base 200 is a square base with an arched support platform 210 protruding from its upper surface. An adsorption cavity is located inside the support platform 210, and a plurality of adsorption holes 211 are arranged in an array on the surface of the support platform 210. Each of the adsorption holes 211 communicates with the adsorption cavity through an air passage, and the side of the clamping base 200 has a suction port 230 communicating with the adsorption cavity.

[0031] Ceramic matrix composites are inherently brittle and have poor resistance to deformation. Large, thin-walled ceramic matrix composite pads 100, made from ceramic matrix composites, are already subject to torsional deformation, which prevents their surface from adhering well to the support platform 210 during clamping. If a fixing plate 400 is used to directly fix the ceramic matrix composite pad 100, the inherent brittleness of the ceramic matrix composite means that the immense overall pressure applied by the fixing plate 400 can easily cause the pad 100 to fracture or crack. In this disclosure, arrayed adsorption holes 211 are formed on the surface of the support platform 210. A uniform adsorption force is applied to the ceramic matrix composite pad 100 on the surface of the support platform 210 through negative pressure adsorption. This ensures that the ceramic matrix composite pad 100 adheres well to the surface of the support platform 210, preventing localized areas of lack of support that could affect clamping stability and subsequent processing accuracy. At the same time, atmospheric pressure is used to achieve uniform adsorption, which reduces the huge overall pressure exerted by the fixed pressure plate 400 on the ceramic matrix composite pad 100, thus preventing the ceramic matrix composite pad 100 from breaking or cracking.

[0032] Please see Figure 4 The flexible pad 300 is laid on the support platform 210, and its surface has a plurality of ventilation holes 310 corresponding one-to-one with the adsorption holes 211, while the ceramic matrix composite material pad 100 is placed on the flexible pad 300.

[0033] The surface of ceramic matrix composites is not perfectly flat, and rigid contact can generate localized point stresses, which can easily lead to breakage or cracking of the ceramic matrix composite pad 100 during subsequent processing. In this disclosure, a flexible pad 300 is used to support the ceramic matrix composite pad 100. On the one hand, its good viscoelasticity buffers the rigid contact between the ceramic matrix composite pad 100 and the support platform 210. On the other hand, it can automatically compensate for stress concentration caused by uneven shell wall thickness and prevent localized breakage of the ceramic matrix composite pad 100.

[0034] In this disclosure, since the ventilation holes 310 on the surface of the flexible pad 300 correspond one-to-one with the adsorption holes 211 on the surface of the support platform 210, the ceramic matrix composite pad 100 on the surface of the flexible pad 300 will be subjected to adsorption force, thereby firmly "pulling" the ceramic matrix composite pad 100 onto the surface of the support platform 210 through negative pressure.

[0035] In this disclosure, the flexible pad 300 is made of a viscoelastic polymer material, preferably with a Shore A30-A60 hardness. Excessive or insufficient hardness will affect the supporting and cushioning function of the flexible pad 300 on the ceramic matrix composite pad 100. In some preferred embodiments, the flexible pad 300 is made of polyurethane elastomer, fluororubber, or silicone rubber.

[0036] Please see Figure 5 In this disclosure, the lower surface of the fixed pressure plate 400 is recessed to form an arc-shaped groove 410 that matches the support platform. The fixed pressure plate 400 presses the ceramic matrix composite material pad 100 onto the support platform through the wall of the arc-shaped groove 410.

[0037] Please see Figure 3 In one embodiment of this disclosure, the clamping base 200 is provided with limiting mounting seats 220 at its four corners, and the fixing pressure plate 400 is provided with connecting ears 430 at its four corners respectively. When the fixing pressure plate 400 is placed on the clamping base 200, the connecting ears 430 at the four corners rest on the limiting mounting seats 220 respectively, and then the connecting ears 430 are locked onto the limiting mounting seats 220 respectively by the locking members 220. The locking members 220 include, but are not limited to, screws, bolts, etc., and the tightness of the ceramic matrix composite material pad 100 clamping can be adjusted by adjusting the locking degree of the locking members 220.

[0038] Please see Figure 3 In one embodiment of this disclosure, the limiting mounting base 220 is further provided with a positioning post 221, and the connecting ear 430 is provided with a positioning hole that matches the positioning post 221. When the fixing plate 400 is placed on the clamping base 200, the fixing plate 400 is guided by the positioning post 221, which can improve the positioning accuracy.

[0039] Please see Figure 1 During the processing of the ceramic matrix composite material pad 100 disclosed herein, multiple mounting holes 110 need to be machined at the two side edges and the rear edge of its front (convex) side, and square holes 120 need to be machined in its middle area; at the same time, multiple grooves need to be machined on its back (concave) side.

[0040] Please see Figure 2 and 6 In order to achieve simultaneous processing of both sides after a single clamping, avoid damage to the ceramic matrix composite pad 100 caused by multiple clampings, and mitigate the impact of multiple clampings on the positioning accuracy of the ceramic matrix composite pad 100, in this disclosure, the lower surface of the clamping base 200 and the upper surface of the fixed pressure plate 400 are both set as planes. At the same time, multiple processing holes 420 are provided on both the clamping base 200 and the fixed pressure plate 400, and clearance holes 320 are provided in the area of ​​the flexible pad 300 located in the area of ​​the processing holes 420 of the clamping base 200.

[0041] Please see Figure 2 and 5 In this disclosure, the width of the fixed pressure plate 400 is smaller than the width of the support platform, and the two sides of the fixed pressure plate 400 protrude to form a plurality of pressure blocks 440 arranged at intervals. The lower surface of the pressure block 440 is an arc-shaped surface adapted to the support platform. The pressure block 440 is preferably integrally formed with the fixed pressure plate 400.

[0042] In this disclosure, since the width of the fixed pressure plate 400 is smaller than the width of the support platform, when the ceramic matrix composite material pad 100 is placed on the support platform, its two side edges are exposed. Therefore, the two side edges can be drilled using a machining tool. By setting multiple pressure blocks 440 arranged at intervals, the edges of the ceramic matrix composite material pad 100 can be pressed and fixed, preventing the two side edges of the ceramic matrix composite material pad 100 from shaking during drilling, which would not only affect the machining accuracy but also cause the ceramic matrix composite material pad 100 to break.

[0043] In addition, this disclosure also provides a method for processing a ceramic matrix composite material pad 100, including the following steps: S1. Lay the flexible pad 300 on the support platform of the clamping base 200, and align the vent hole 310 on the flexible pad 300 with the adsorption hole 211 on the support platform. S2. Place the ceramic matrix composite material pad 100 to be processed on the flexible pad 300 on the support platform, and then connect the suction port 230 on the side of the clamping base 200 to the pump body for suction, so that the ceramic matrix composite material pad 100 is tightly attached to the flexible pad 300. S3. Place the fixed pressure plate 400 on the support platform and lock the fixed pressure plate 400 on the clamping base 200 by the locking member 220, thereby fixing the ceramic matrix composite material pad 100 on the clamping mechanism. S4. Cut the two sides of the ceramic matrix composite pad 100, drill holes in the area of ​​the ceramic matrix composite pad 100 between two adjacent pressure blocks 440 of the fixed pressure plate 400, and drill holes in the front of the ceramic matrix composite pad 100 through the processing holes 420 on the surface of the fixed pressure plate 400. S5. Flip the clamping mechanism so that the clamping base 200 faces upward, and then perform grooving on the back side of the ceramic matrix composite material pad 100 through the machining hole 420 on the surface of the clamping base 200.

[0044] In step S2 of this disclosure, after connecting the suction port 230 on the side of the clamping base 200 to an external pump, the pump is started to perform suction, controlling the vacuum degree in the adsorption chamber to be -0.1 to -0.01 MPa, for example, -0.1, -0.09, -0.08, -0.07, -0.06, -0.05, -0.04, -0.03, -0.02, -0.01 MPa, etc. If the vacuum degree is lower than the range of -0.1 to -0.01 MPa, the adsorption force on the ceramic matrix composite pad 100 is too small, resulting in poor adhesion between the ceramic matrix composite pad 100 and the flexible pad 300.

[0045] In step S3 of this disclosure, after the fixed pressure plate 400 is locked onto the clamping base 200, the external pump body can be turned off.

[0046] In step S3 of this disclosure, when the fixing plate 400 is locked onto the clamping base 200, the pressure between the fixing plate 400 and the ceramic matrix composite pad 100 is preferably controlled to be 20-50 MPa, for example, the pressure can be controlled to be 20 MPa, 30 MPa, 40 MPa, 50 MPa, etc. This pressure range can produce a good fixing effect on the ceramic matrix composite pad 100 and will not cause brittle fracture of the ceramic matrix composite pad 100. In some embodiments, multiple pressure sensors can be provided on the inner wall of the fixing plate 400, and the average pressure value can be obtained by calculating the tested pressure values, which is the pressure between the fixing plate 400 and the ceramic matrix composite pad 100. During the fixing process, the pressure on the ceramic matrix composite pad 100 can be controlled by adjusting the tightness of the locking members 220 (such as screws) at the four corners of the fixing plate 400.

[0047] In summary, the clamping mechanism for the ceramic matrix composite material pad provided in this disclosure utilizes a dual fixing method of negative pressure adsorption and a fixed pressure plate, combined with precise positioning by positioning columns, to prevent component shaking during processing and ensure processing accuracy. The flexible pad buffers rigid contact, dispersing localized stress and addressing the issue of brittleness and susceptibility to cracking and breakage in ceramic matrix composite materials, thereby improving the yield rate. Furthermore, this clamping mechanism supports completing both front and back side processing (edge ​​cutting, front and back side drilling / grooving) in a single clamping operation, eliminating the need for multiple clamping operations and reducing process steps and positioning errors.

[0048] In summary, although the present disclosure has been disclosed above with reference to preferred embodiments, the above preferred embodiments are not intended to limit the present disclosure. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present disclosure. Therefore, the scope of protection of the present disclosure shall be determined by the scope defined in the claims.

Claims

1. A clamping mechanism for a ceramic matrix composite material pad, characterized in that, It includes a clamping base, a fixing plate, and a flexible pad; the upper surface of the clamping base is provided with an arched support platform, the inside of the support platform has an adsorption cavity, and the surface of the support platform is distributed with a plurality of adsorption holes arranged in an array; the plurality of adsorption holes are connected to the adsorption cavity through air passages, and the side of the clamping base has a suction port connected to the adsorption cavity. The flexible pad is laid on the support platform, and its surface has a plurality of ventilation holes that correspond one-to-one with the adsorption holes; ceramic matrix composite material pads are placed on the flexible pad. The lower surface of the fixed pressure plate is recessed to form an arc-shaped groove that matches the support platform. The fixed pressure plate presses the ceramic matrix composite material pad onto the support platform through the wall of the arc-shaped groove.

2. The clamping mechanism for a ceramic matrix composite material pad as described in claim 1, characterized in that, The flexible pad is made of a viscoelastic polymer material with a hardness range of Shore A30-A60.

3. The clamping mechanism for a ceramic matrix composite material pad as described in claim 2, characterized in that, The flexible pad is made of polyurethane elastomer, fluororubber, or silicone rubber.

4. The clamping mechanism for a ceramic matrix composite material pad as described in claim 1, characterized in that, The clamping base is provided with limiting mounting seats at its four corners, and the fixed pressure plate is provided with connecting ears at its four corners accordingly; the connecting ears are locked to the limiting mounting seats by locking components.

5. The clamping mechanism for a ceramic matrix composite material pad as described in claim 1, characterized in that, The limiting mounting base is also provided with a positioning post, and the connecting ear is provided with a positioning hole that matches the positioning post.

6. The clamping mechanism for a ceramic matrix composite material pad as described in claim 1, characterized in that, The lower surface of the clamping base and the upper surface of the fixing plate are both flat.

7. The clamping mechanism for a ceramic matrix composite material pad as described in claim 1, characterized in that, Both the clamping base and the fixed pressure plate have multiple machining holes, and the flexible pad has clearance holes in the area of ​​the machining holes on the clamping base.

8. The clamping mechanism for a ceramic matrix composite material pad as described in claim 1, characterized in that, The width of the fixed pressure plate is smaller than the width of the support platform, and the two sides of the fixed pressure plate protrude to form a plurality of pressure blocks arranged at intervals. The lower surface of the pressure block is an arc-shaped surface adapted to the support platform.

9. A method for processing a ceramic matrix composite material pad, characterized in that, Includes the following steps: S1. Lay the flexible pad on the support platform of the clamping base, and align the vent holes on the flexible pad with the adsorption holes on the support platform. S2. Place the ceramic matrix composite material pad to be processed on the flexible pad on the support platform, and then connect the suction port on the side of the clamping base to the pump body for suction, so that the ceramic matrix composite material pad is tightly attached to the flexible pad. S3. Place the fixed pressure plate on the support platform and lock the fixed pressure plate onto the clamping base using the locking device, thereby fixing the ceramic matrix composite material pad onto the clamping mechanism; S4. Cut the two sides of the ceramic matrix composite pad, drill holes in the area between two adjacent pressure blocks of the fixed pressure plate, and drill holes in the front of the ceramic matrix composite pad through the processing holes on the surface of the fixed pressure plate. S5. Flip the clamping mechanism so that the clamping base faces upward, and then perform grooving on the back of the ceramic matrix composite material pad through the machining holes on the surface of the clamping base.

10. A method for processing a ceramic matrix composite material pad according to claim 9, characterized in that, In step S2, the vacuum level in the adsorption chamber is controlled to be -0.1 to -0.01 MPa by suction.

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