A mortise and tenon joint split type carbon ceramic brake disc and a preparation method thereof

Abstract

This invention discloses a mortise and tenon joint split-type carbon ceramic brake disc and its manufacturing method, relating to the field of carbon ceramic brake disc technology. The mortise and tenon joint split-type carbon ceramic brake disc includes a brake disc body and an insert. The brake disc body includes a flange body and a base body stacked together. The flange body includes a first mounting end face and a first connecting end face, and the base body includes a second mounting end face and a second connecting end face connected to the first connecting end face. An insert cavity is formed between opposing mounting slots, and an insert is provided in each insert cavity. A first ventilation slot is provided between adjacent mounting slots. This invention changes the force distribution of the flange body and base body by setting the insert, transforming the shear force of traditional rivets into pressure from the flange body and base body on the insert, thus solving the problem of poor overall performance in existing split-type brake discs that use rivet connections.

Description

Technical Field

[0001] This invention relates to the field of carbon ceramic brake disc technology, specifically to a mortise and tenon joint split-type carbon ceramic brake disc and its preparation method. Background Technology

[0002] Continuous fiber-reinforced ceramic matrix composites (CFCCs) inherit the excellent properties of ceramics, such as low density, high strength, and oxidation resistance, while overcoming the weaknesses of ceramics, such as high brittleness and poor reliability. They exhibit fracture behavior similar to metals, are insensitive to cracks, and are not prone to catastrophic fractures, making them a promising candidate for applications in friction braking. C / SiC composites possess a series of excellent properties, including high specific strength, high specific modulus, high hardness, low density, low coefficient of friction, and low wet-state decay, making them one of the most promising friction materials currently available.

[0003] The preparation processes of C / SiC composites can be divided into two categories: the gas-phase approach, also known as chemical vapor infiltration (CVI); and the liquid-phase approach, including polymer impregnation pyrolysis (PIP) and liquid silica infiltration (LSI) or reactive melt infiltration (RMI). Regardless of the CVI process used, a certain amount of open pores will remain inside the composite material, resulting in lower thermal conductivity. Nevertheless, the CVI process is a mature technology for preparing SiC-based composites, with the following significant advantages: high practicality and relatively low preparation temperature; effective design of composite material composition at the microscopic level; suitable for preparing products with high fiber volume fraction, complex shapes, large net dimensions, and a wide size range; and minimal fiber damage during the preparation process.

[0004] Refined matrix infiltration (RMI) is a densification process that generates a matrix in situ through a chemical reaction, with reaction products typically being carbides and borides. Compared to carbon fiber impregnation (CVI), RMI offers lower manufacturing costs, shorter production cycles, and the ability to fabricate complex-shaped components. The resulting materials exhibit low residual porosity and good density. However, RMI also has some drawbacks: without protection during the impregnation reaction, the carbon fibers can react with the impregnated metal phase, corroding and damaging the fibers and affecting the material's mechanical properties. Furthermore, unreacted metal residues within the material can accelerate creep at high temperatures, disrupting phase stability and reducing material performance.

[0005] Traditional integral carbon ceramic brake discs have multiple ventilation slots arranged around their circumference to reduce weight and dissipate heat. However, ventilation slots cannot be processed when the brake disc blank has a low density. Ventilation slots can only be processed when the brake disc blank has a certain strength and machinability. Moreover, the processing of ventilation slots is time-consuming, and the removed material is all scrap, resulting in a large waste of manpower, materials and time.

[0006] At the same time, due to the thickness of the integral carbon-ceramic brake disc and the presence of different structures in the thickness direction, such as mounting hole steps and ventilation grooves, the melt penetration process is complex and difficult to control. This leads to uneven density after the carbon-ceramic brake disc blank undergoes RMI modification, which directly results in the remaining imbalance of the carbon-ceramic brake disc exceeding the tolerance, and the product being scrapped.

[0007] To address the shortcomings of the aforementioned integral carbon-ceramic brake disc manufacturing process, the existing split-type carbon-ceramic brake discs utilize a method of dividing the disc in half along its thickness direction. This transforms the circumferential machining of the ventilation grooves into single-sided milling within the brake disc plane, significantly shortening processing time and reducing processing difficulty. Subsequently, the two halves of the brake disc are riveted together as a single unit using mechanical connections such as rivets and screws. During the use of the brake disc, the rivets are the main load-bearing units, and their shear strength directly determines the mechanical properties of the brake disc. However, due to the limited riveting area, the diameter, number, and arrangement of the rivets are all restricted. During use, if even one rivet fails, the overall performance of the brake disc will be greatly reduced. Summary of the Invention

[0008] The purpose of this invention is to provide a mortise and tenon joint split carbon ceramic brake disc and its preparation method, so as to solve the problem that the existing split brake discs use rivet connections, which have poor overall performance.

[0009] The technical solution of the present invention to solve the above-mentioned technical problems is as follows:

[0010] A mortise and tenon joint split carbon ceramic brake disc includes a brake disc body and an insert. The brake disc body includes a flange body and a chassis body stacked together. The flange body includes a first mounting end face and a first connecting end face. The chassis body includes a second mounting end face and a second connecting end face connected to the first connecting end face. The first connecting end face and the second connecting end face are respectively provided with a plurality of spaced mounting grooves. An embedding cavity is formed between opposite mounting grooves. An insert is provided in each embedding cavity. A first ventilation groove is provided between adjacent mounting grooves. A first ventilation cavity is formed between opposite first ventilation grooves.

[0011] The beneficial effects of the above technical solution are as follows: After the flange body and the chassis body are connected, the opposing mounting grooves close together to form an embedded cavity. The insert is placed into the embedded cavity, thus achieving a tenon-and-mortise connection between the flange body and the chassis body. Furthermore, the first ventilation groove of the flange body and the first ventilation groove of the chassis body close together to form a first ventilation cavity. This technical solution changes the force distribution of the flange body and chassis body by setting the insert, transforming the shear force of traditional rivets into pressure from the flange body and chassis body on the insert. Moreover, while meeting the connection strength requirements, it also forms a first ventilation cavity, fully utilizing the compressive strength advantage of the ceramic phase, improving the connection reliability of the split brake disc, and thus solving the problem of poor overall performance in existing split brake discs that use rivet connections.

[0012] Secondly, this technical solution breaks down the traditional thick integral carbon ceramic brake disc into multiple parts, which not only improves the material utilization rate of the preform plate, but also allows each part to be prepared in batches separately. It also reduces the process difficulty caused by the thickness of the preform, such as uneven carbon density of the matrix and uneven density of the ceramic phase after high-temperature modification, thus saving the preparation cycle and improving the first-pass yield of the product.

[0013] Furthermore, the two ends of the mounting groove extend to the inner and outer sides of the brake disc body, respectively. The mounting groove includes an interconnected mounting section and a heat dissipation section. The mounting section is close to the inner side of the brake disc body and cooperates with the insert.

[0014] Furthermore, the heat dissipation section is provided with multiple first heat dissipation through holes, and the first ventilation slot is provided with multiple second heat dissipation through holes at intervals. The first and second heat dissipation through holes extend to the end face of the brake disc body.

[0015] The beneficial effects of adopting the above technical solution are as follows: the mounting section is used to install the embedded body, and the heat dissipation section can not only reduce the overall weight of the disk body, but also facilitate heat dissipation.

[0016] Furthermore, the first ventilation slot includes a constricted end and an enlarged end, the constricted end extending to the inner side of the brake disc body and the enlarged end extending to the outer side of the brake disc body.

[0017] Furthermore, a second ventilation groove extending to both ends of the insert is provided on the top side of the insert, and wedge-shaped grooves are provided on both sides of the insert.

[0018] The beneficial effects of adopting the above technical solution are as follows: the second ventilation slot of this technical solution is used in conjunction with the first ventilation slot. When the embedded body is embedded in the embedded cavity, the second ventilation slot plays a role in heat dissipation and improves the ventilation effect.

[0019] Furthermore, the first mounting end face is provided with an annular groove for connecting the wheel hub, and the brake disc body is provided with a mounting through hole that passes through the flange body, the insert body and the chassis body, and the mounting through hole is located in the annular groove.

[0020] A method for manufacturing the above-mentioned mortise and tenon joint split carbon ceramic brake disc includes the following steps:

[0021] S1: Preparation of a three-dimensional needle-punched preform plate;

[0022] S2: A pyrolytic carbon interface layer is prepared on the surface of the three-dimensional needle-punched preform plate using a chemical vapor infiltration process;

[0023] S3: Then, carbon is introduced into the three-dimensional needle-punched preform plate obtained in step S2 using a polymer impregnation pyrolysis process.

[0024] S4: Machining the three-dimensional needle-punched preform plate obtained in step S3 to obtain the flange body, the chassis body and the insert;

[0025] S5: After the flange body and chassis body are fastened together, multiple inserts are then inserted into each insert cavity in sequence. Finally, the flange body, chassis body and inserts are connected by fasteners to obtain the brake disc as a whole.

[0026] S6: The entire brake disc undergoes a densification process;

[0027] S7: Perform dimensional finishing on the entire brake disc after densification treatment to complete product preparation.

[0028] Further, in step S2, the chemical vapor infiltration process is as follows: vacuum degree ≤200Pa, temperature 700~900℃, propylene, hydrogen and argon are introduced, and the temperature is maintained for 100~200h.

[0029] Further, in step S3, the polymer impregnation pyrolysis process is as follows: the three-dimensional needled preform plate is placed in an impregnation tank, and when the air pressure reaches -0.5 to -0.1 MPa, the pressure is maintained for 30 minutes. Then, resin slurry is added to the impregnation tank, and the pressure is continued to reach 1.0 to 3.0 MPa. After maintaining the pressure for 30 minutes, the pressure is restored to normal and the three-dimensional needled preform plate is taken out. The cured three-dimensional needled preform plate is placed in a vacuum induction furnace with a vacuum degree ≤200 Pa and a temperature of 700 to 900 °C for 2 to 4 hours.

[0030] Furthermore, in step S6, the brake disc is densified by a reactive melt infiltration process.

[0031] The present invention has the following beneficial effects:

[0032] (1) The present invention changes the stress form of the flange body and the chassis body by setting an insert, transforming the shear force of the traditional rivet into the pressure of the flange body and the chassis body on the insert. Moreover, while meeting the connection strength requirements, it also forms a first ventilation cavity, giving full play to the compressive strength advantage of the ceramic phase, improving the connection reliability of the split brake disc, that is, solving the problem of poor overall performance of the existing split brake disc using rivet connection.

[0033] (2) The present invention disassembles the traditional thick integral carbon ceramic brake disc into multiple parts, which not only improves the material utilization rate of the preform plate, but also allows each part to be prepared in batches separately. It also reduces the process difficulty caused by the thickness of the preform, such as uneven carbon density of the matrix and uneven density of the ceramic phase after high temperature modification, thus saving the preparation cycle and improving the first-pass yield of the product.

[0034] (3) The second ventilation slot of the present invention is used in conjunction with the first ventilation slot. When the insert is embedded in the embedded cavity, the second ventilation slot plays a role in heat dissipation and improves the ventilation effect. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the mortise and tenon joint split carbon ceramic brake disc of the present invention;

[0036] Figure 2 An exploded view of the mortise and tenon joint split carbon ceramic brake disc of the present invention;

[0037] Figure 3 This is a schematic diagram of the structure of the embedding body of the present invention;

[0038] Figure 4 This is a schematic diagram of the wedge-shaped groove of the present invention;

[0039] Figure 5 This is a schematic diagram of the mounting groove of the present invention;

[0040] Figure 6 This is a schematic diagram of the annular groove of the present invention.

[0041] In the figure: 1-Brake disc body; 2-Embedded body; 201-Second ventilation groove; 202-Wedge groove; 11-Flange body; 12-Chassis body; 111-First mounting end face; 112-First connecting end face; 113-Annular groove; 114-Mounting through hole; 121-Second mounting end face; 122-Second connecting end face; 3-Mounting groove; 301-Mounting section; 302-Heat dissipation section; 5-First ventilation groove; 501-Constriction end; 502-Enlarged end; 601-First heat dissipation through hole; 602-Second heat dissipation through hole. Detailed Implementation

[0042] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0043] Please refer to Figure 1 and Figure 2 A mortise and tenon joint split carbon ceramic brake disc includes a brake disc body 1 and multiple inserts 2, which are spaced apart along the inner circumferential direction of the brake disc body 1.

[0044] The brake disc body 1 includes a flange body 11 and a chassis body 12 stacked together. The flange body 11 includes a first mounting end face 111 and a first connecting end face 112. The chassis body 12 includes a second mounting end face 121 and a second connecting end face 122 connected to the first connecting end face 112. The first connecting end face 112 and the second connecting end face 122 are respectively provided with a plurality of spaced mounting grooves 3, and an embedded cavity is formed between opposite mounting grooves 3. An embedded body 2 is provided in each embedded cavity. A first ventilation groove 5 is provided between adjacent mounting grooves 3, and a first ventilation cavity is formed between opposite first ventilation grooves. After the flange body 11 and the chassis body 12 are connected, the opposite mounting grooves 3 close together to form an embedded cavity. The embedded body 2 is placed into the embedded cavity, thereby realizing the tenon and mortise connection between the flange body 11 and the chassis body 12. In addition, the first ventilation groove 5 of the flange body 11 and the first ventilation groove 5 of the chassis body 12 close together to form a first ventilation cavity.

[0045] This invention alters the force distribution between the flange body 11 and the chassis body 12 by incorporating an insert 2. It transforms the shear force of traditional rivets into pressure exerted by the flange body 11 and chassis body 12 on the insert 2. Furthermore, while meeting connection strength requirements, it also creates a first ventilation cavity, fully leveraging the compressive strength of the ceramic phase and improving the connection reliability of the split brake disc. This solves the problem of poor overall performance in existing split brake discs using rivet connections. Secondly, this invention disassembles the traditional thick, integral carbon-ceramic brake disc into multiple parts. This improves the material utilization rate of the prefabricated plate and allows for the separate mass production of each part. It also reduces the process difficulties caused by uneven carbon density in the matrix and uneven ceramic phase density after high-temperature modification due to the thickness of the prefabricated body, saving the manufacturing cycle and increasing the first-pass yield.

[0046] Please refer to Figure 3 and Figure 4 The insert 2 has wedge-shaped grooves 202 on both sides, with the included angle of the wedge-shaped grooves 202 ranging from 60° to 88°. The wedge-shaped grooves 202 can prevent the insert 2 from sliding out of the embedding cavity. In this embodiment, 10 inserts 2 are provided. In other embodiments, more or fewer than 10 inserts 2 can be provided.

[0047] The top side of the insert 2 is provided with a second ventilation groove 201 extending to both ends of the insert 2. In this embodiment, the second ventilation groove 201 is used in conjunction with the first ventilation groove 5. When the insert 2 is embedded in the embedded cavity, the second ventilation groove 201 plays a role in diverting the flow and improving the ventilation effect. In other embodiments, without affecting the assembly and load-bearing performance, second ventilation grooves 201 of different widths and depths are opened on the insert 2.

[0048] The present invention provides multiple inserts 2 in the circumferential direction of the brake disc body 1, which can act as balance adjustment blocks in the dynamic balance test of carbon ceramic brake disc. By reducing the weight of one or more inserts 2, the remaining imbalance of the entire carbon ceramic brake disc can be adjusted, leaving a large adjustment space for the leveling of the carbon ceramic brake disc.

[0049] Please refer to Figure 5 The mounting groove 3 extends to the inner and outer sides of the brake disc body 1 at both ends. The mounting groove 3 includes an interconnected mounting section 301 and a heat dissipation section 302. The mounting section 301 cooperates with the insert 2 and extends to the inner side of the brake disc body 1. The heat dissipation section 302 extends to the outer side of the brake disc body 1. The heat dissipation section 302 is provided with a plurality of first heat dissipation through holes 601 at intervals, and the first ventilation groove 5 is provided with a plurality of second heat dissipation through holes 602 at intervals. The first heat dissipation through holes 601 and the second heat dissipation through holes 602 extend to the end face of the brake disc body 1.

[0050] The first ventilation slot 5 includes a constricted end 501 and an enlarged end 502. The constricted end 501 extends to the inner side of the brake disc body 1, and the enlarged end 502 extends to the outer side of the brake disc body 1.

[0051] Please refer to Figure 6 The first mounting end face 111 is provided with an annular groove 113 for connecting the wheel hub. The annular groove 113, the insert 2 and the second mounting end face 121 are provided with a plurality of mounting through holes 114 at circumferential intervals. The mounting through holes 114 are used for bolts to pass through, thereby connecting the brake disc to the wheel hub as a whole.

[0052] A method for manufacturing the above-mentioned mortise and tenon joint split carbon ceramic brake disc includes the following steps:

[0053] S1: Using carbon fiber non-woven fabric and carbon fiber mesh, a needle-punched prefabricated plate with a certain volume density is prepared through needle punching process as the main material for flange body 11, chassis body 12 and insert body 2 in the above-mentioned tenon and mortise connected split carbon ceramic brake disc structure.

[0054] In this embodiment, the bulk density of the carbon fiber needle-punched preform plate used as the main material for the flange body 11, the chassis body 12, and the insert 2 ranges from 0.5 to 0.55 g / cm³. 3The carbon fiber nonwoven fabric has the fiber grade T700SC-6000, and the carbon fiber mesh tread density ranges from 40 g / m². 2 ;

[0055] S2: A pyrolytic carbon interface layer is prepared on the surface of the three-dimensional needled preform plate using a chemical vapor infiltration process. The specific preparation process is as follows: The three-dimensional needled preform plate is placed on the bottom plate of a vacuum induction furnace, and the plate is sent into the furnace chamber using a lifting platform; the vacuum pump is started to evacuate the vacuum. When the vacuum degree is ≤200Pa, the power is turned on and the temperature is raised from room temperature to 900℃ at a rate of 3-5℃ / min. Propylene, hydrogen and argon with a purity of 99.9% are introduced in a gas flow ratio of 1:3:3. The temperature is maintained for 80h. After the temperature maintenance is completed, the power is turned off and the furnace is cooled down to room temperature.

[0056] S3: Carbon is then introduced into the three-dimensional needled preform plate obtained in step S2 using a polymer impregnation pyrolysis process. The preparation process is as follows: The three-dimensional needled preform plate is placed in the bottom tray of an impregnation tank. The tank door is closed, and a vacuum pump is started to evacuate the tank. When the pressure inside the tank reaches -0.1 MPa, the pressure is maintained for 30 minutes. After the pressure maintenance is completed, the pre-prepared resin slurry is drawn into the tank using the negative pressure inside. The resin slurry uses 2123 phenolic resin and its curing agent (hexamethyltetramine), and the solvent is ethanol. The resin mass fraction is 12%–15%. The resin slurry is used to submerge the three-dimensional needled preform plate. After forming the plate, pressurize the tank until the internal pressure reaches 1.0 MPa, hold the pressure for 30 minutes, then restore to normal pressure. Remove the three-dimensional needled preform plate from the resin slurry and place it in an 80℃ oven for curing. Then place the cured three-dimensional needled preform plate on the bottom of a vacuum induction furnace and use a lifting platform to send the plate into the furnace chamber. Start the vacuum pump to create a vacuum. When the vacuum degree is ≤200 Pa, turn on the power and start heating. Increase the temperature from room temperature to 950℃ at a rate of 3-5℃ / min and hold for 2 hours. After the holding period, turn off the power and let the furnace cool down to room temperature. Remove the three-dimensional needled preform plate.

[0057] It is worth noting that after step S3 was completed, the density of the three-dimensional needle-punched preform plate was measured, and the density reached 1.0 g / cm³. 3 If the concentration is 1.0 g / cm³ or higher, proceed to step S4. 3 If so, then repeat step S3;

[0058] S4: Machining the three-dimensional needle-punched preform plate obtained in step S3, machining the outline and thickness of the flange body 11, the base body 12 and the insert 2, as well as the mounting groove 3, mounting through hole 114, the first heat dissipation through hole 601 and the second heat dissipation through hole 602 on them.

[0059] S5: After the flange body 11 and the chassis body 12 are fastened together, multiple inserts 2 are inserted into each insert cavity in sequence. Finally, the flange body 11, chassis body 12 and inserts 2 are connected by fasteners, which are bolts, to obtain the brake disc as a whole.

[0060] S6: The brake disc is densified using a reactive melt infiltration process. The specific preparation process is as follows: the assembled brake disc preform is placed into a graphite crucible, silicon powder is added to the crucible, and then the crucible containing the brake disc preform is placed on the bottom plate of a vacuum induction furnace. The preform and crucible are then sent into the furnace chamber using a lifting platform. The vacuum pump is started to evacuate the vacuum. When the vacuum degree is ≤200Pa, the power is turned on and the temperature is raised from room temperature to 1400±50℃ at a rate of 3-5℃ / min. The temperature is held at 1400℃ for 1 hour, then raised from 1400℃ to 1500℃ at a rate of 2-3℃ / min. The temperature is held at 1500℃ for 1 hour, then raised from 1500℃ to 1600℃ at a rate of 2-3℃ / min. The temperature is held at 1600℃ for 0.5 hours, and then cooled to room temperature.

[0061] S7: Perform dimensional finishing on the entire brake disc after densification treatment to complete product preparation.

[0062] A porous three-dimensional needled preform plate with a certain density was prepared using a chemical vapor infiltration process. Subsequently, a polymer impregnation pyrolysis process was used to introduce resin into the porous three-dimensional needled preform plate, which was then decomposed to generate excess carbon. A reactive melt infiltration process was then used to introduce molten silicon alloy into the interior of the three-dimensional needled preform plate, resulting in a highly dense three-dimensional needled preform plate. Pre-depositing a PyC (pyrolytic carbon) interface layer effectively protects the carbon fibers, preventing corrosion by the Si melt during the reactive melt infiltration process and allowing for better utilization of the carbon fibers' load-bearing capacity.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A mortise and tenon joint split-type carbon ceramic brake disc, characterized in that, include: Brake disc body (1) and insert (2), wherein the brake disc body (1) includes a flange body (11) and a chassis body (12) stacked together. The flange body (11) includes a first mounting end face (111) and a first connecting end face (112). The chassis body (12) includes a second mounting end face (121) and a second connecting end face (122) connected to the first connecting end face (112). The first connecting end face (112) and the second connecting end face (122) are respectively provided with a plurality of spaced mounting grooves (3). An embedded cavity is formed between the opposite mounting grooves (3). An embedded body (2) is provided in each of the embedded cavities. A first ventilation groove (5) is provided between adjacent mounting grooves (3). A first ventilation cavity is formed between the opposite first ventilation grooves (5). The first ventilation slot (5) includes a constricted end (501) and an enlarged end (502). The constricted end (501) extends to the inner side of the brake disc body (1), and the enlarged end (502) extends to the outer side of the brake disc body (1). The top side of the insert (2) is provided with a second ventilation groove (201) extending to both ends of the insert (2), and the two sides of the insert (2) are respectively provided with wedge-shaped grooves (202). The first mounting end face (111) is provided with an annular groove (113) for connecting the wheel hub. The brake disc body (1) is provided with a mounting through hole (114) that passes through the flange body (11), the insert (2) and the chassis body (12). The mounting through hole (114) is located in the annular groove (113).

2. The mortise and tenon joint split carbon ceramic brake disc according to claim 1, characterized in that, The two ends of the mounting groove (3) extend to the inner and outer sides of the brake disc body (1), respectively. The mounting groove (3) includes a mounting section (301) and a heat dissipation section (302) that are connected to each other. The mounting section (301) is close to the inner side of the brake disc body (1) and cooperates with the insert (2).

3. The mortise and tenon joint split carbon ceramic brake disc according to claim 2, characterized in that, The heat dissipation section (302) is provided with a plurality of first heat dissipation through holes (601), and the first ventilation groove (5) is provided with a plurality of second heat dissipation through holes (602) at intervals. The first heat dissipation through holes (601) and the second heat dissipation through holes (602) extend to the end face of the brake disc body (1).

4. A method for manufacturing a mortise and tenon joint split carbon ceramic brake disc as described in any one of claims 1 to 3, characterized in that, Includes the following steps: S1: Preparation of a three-dimensional needle-punched preform plate; S2: A pyrolytic carbon interface layer is prepared on the surface of the three-dimensional needle-punched preform plate using a chemical vapor infiltration process; S3: Then, carbon is introduced into the three-dimensional needle-punched preform plate obtained in step S2 using a polymer impregnation pyrolysis process. S4: The three-dimensional needle-punched preform plate obtained in step S3 is machined to obtain the flange body (11), the chassis body (12) and the insert (2). S5: After fastening the flange body (11) and the chassis body (12) together, insert the multiple inserts (2) into each insert cavity in sequence, and finally connect the flange body (11), the chassis body (12) and the inserts (2) with fasteners to obtain the brake disc as a whole; S6: The entire brake disc undergoes a densification process; S7: Perform dimensional finishing on the entire brake disc after densification treatment to complete product preparation.

5. The method for preparing the mortise and tenon joint split carbon ceramic brake disc according to claim 4, characterized in that, In step S2, the chemical vapor infiltration process is as follows: vacuum degree ≤200Pa, temperature 700~900℃, propylene, hydrogen and argon are introduced, and the temperature is maintained for 100~200h.

6. The method for preparing the mortise and tenon joint split carbon ceramic brake disc according to claim 4, characterized in that, In step S3, the polymer impregnation pyrolysis process is as follows: the three-dimensional needled preform plate is placed in an impregnation tank, and the pressure is maintained for 30 minutes when the air pressure reaches -0.5 to -0.1 MPa. Then, resin slurry is added to the impregnation tank, and the pressure is continued to reach 1.0 to 3.0 MPa. After maintaining the pressure for 30 minutes, the pressure is restored to normal and the three-dimensional needled preform plate is taken out. The cured three-dimensional needled preform plate is placed in a vacuum induction furnace with a vacuum degree ≤200 Pa and a temperature of 700 to 900 °C for 2 to 4 hours.

7. The method for preparing the mortise and tenon joint split carbon ceramic brake disc according to claim 4, characterized in that, In step S6, the brake disc is densified by a reactive melt infiltration process.

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