Tooling for brake disc manufacturing and method for manufacturing a brake disc

Abstract

This invention discloses a tooling mold for manufacturing brake discs and a method for manufacturing brake discs. The tooling mold includes an insertion section whose shape matches the shape of the heat dissipation holes and achieves an interference fit after insertion. The end of the insertion section is fixedly connected to a sliding groove via a connecting rod. A sliding plate, which cooperates with the sliding groove, enables position adjustment of the insertion section. This invention offers flexible overall adjustment and can be used for combined adjustment of the spacing for brake discs of different sizes, facilitating operator operation. The method of manufacturing brake discs using this invention reduces the difficulty of drilling holes in carbon-carbon composite brake disc preforms, reducing processing volume; it reduces the time and material consumption required for brake disc vapor deposition; it improves the smoothness of the inner surface of the heat dissipation holes, reducing processing volume and avoiding dynamic imbalance and airflow velocity uniformity issues caused by rough holes; it promotes uniform product material, ensures uniform expansion coefficient, and reduces the probability of product cracking.

Description

Technical Field

[0001] This invention belongs to the field of tooling and molds, and in particular relates to a tooling mold for manufacturing brake discs and a method for manufacturing brake discs using the tooling mold for manufacturing brake discs. Background Technology

[0002] Brake discs are a crucial component of a car's braking system. They work in conjunction with calipers, and the clamping action between the calipers and the brake disc achieves braking or deceleration. Brake discs can be categorized by form into solid discs and ventilated discs. Ventilated discs have numerous holes on their circumference leading to the center, facilitating ventilation and cooling during braking, thus improving brake disc performance. Brake discs can also be classified by material, including metal and fiber composite materials.

[0003] Among them, fiber composite ventilation discs are manufactured and their performance is improved through corresponding densification processes. However, the preform after vapor deposition densification is hard, making it difficult, inefficient, and costly to create holes on its surface, and it is also prone to micro-cracks. In addition, subsequent siliconization treatment of brake discs without molded plugs after vapor deposition will result in high surface roughness of the heat dissipation holes, and the micro-cracks generated during the previous hole-making process will cause silicon marks on the product surface, resulting in low yield. Together, these factors reduce the uniformity of airflow velocity after the brake disc rotates at high speed, affecting dynamic balance. Furthermore, the subsequent finishing of the inner hole of this type of brake disc is difficult and time-consuming, and the high surface roughness of the inner hole will also affect the heat dissipation effect of the brake disc during rapid rotation.

[0004] In the manufacturing process of this type of brake disc, in order to reduce the roughness of the inner surface of the heat dissipation holes, avoid dynamic imbalance after high-speed rotation, improve the heat dissipation effect of the brake disc, reduce the processing difficulty of the heat dissipation holes and the overall production cost of the brake disc, and improve the product yield, this technical solution proposes a tooling mold and a method for manufacturing brake discs. That is, the preform of the brake disc is opened after the resin is cured, which reduces the processing difficulty. Even if micro-cracks are generated by opening holes in the preform, they can be eliminated by growth and filling during the subsequent vapor deposition process, reducing vapor deposition time and raw material consumption. Moreover, after inserting the tooling mold insert into the heat dissipation hole and interfering with it during the siliconization process, the non-uniform accumulation of material on the inner surface of the heat dissipation hole during siliconization can be reduced or even eliminated, effectively improving the surface smoothness of the hole, reducing the amount of subsequent processing, and at the same time improving the uniformity of the product material and its coefficient of expansion, reducing the incidence of cracking, and ensuring the dynamic balance of the brake disc. Summary of the Invention

[0005] This invention provides a tooling mold for manufacturing brake discs and a method for manufacturing brake discs, thus solving the above problems.

[0006] The present invention provides a tooling mold for manufacturing brake discs. In the manufacturing process of fiber material brake discs, the insert section of the tooling mold is used to insert and interfere with the heat dissipation holes of the brake disc. This improves the smoothness of the inner surface of the heat dissipation holes in the densification process and reduces the problems of dynamic imbalance and airflow velocity uniformity imbalance caused by the high roughness of the holes.

[0007] The present invention provides a tooling mold for manufacturing brake discs, used to plug the heat dissipation holes on the outer periphery of a semi-finished brake disc made of carbon-carbon composite material after initial processing. The tooling mold includes:

[0008] Insertion section: The shape is consistent with the heat dissipation holes opened on the outer periphery of the brake disc semi-finished product, and an interference fit is achieved after insertion. The end of the insertion section is fixedly connected to the sliding groove by a connecting rod.

[0009] Sliding piece: It adopts an arc-shaped structure with uniform thickness. The sliding piece cooperates with the sliding groove to realize the position adjustment and free combination of the plug-in section.

[0010] Furthermore, the slide groove adopts an arc-shaped structure corresponding to the slide piece, including an inwardly recessed limiting scraping edge that cooperates with the sliding of the slide piece.

[0011] Furthermore, the connector segment is made of ceramic or composite material; the composite material includes carbon-carbon composite material and carbon-ceramic composite material.

[0012] A method for manufacturing brake discs using tooling dies, the method comprising the following steps:

[0013] S1. A disc-shaped preform made of carbon-carbon composite material;

[0014] S2. The disc-shaped preform is impregnated with resin or sprayed.

[0015] S3. The disc-shaped preform is cured and dried. The room temperature curing temperature is between 20°C and 80°C, and the curing time is between 24 and 48 hours. The maximum high temperature curing temperature is between 200°C and 300°C, and the maximum temperature holding time is between 2 and 6 hours, resulting in a cured density of 0.4 g / cm³. 3 -1.2 g / cm 3 Circular prefabricated body;

[0016] S4. The obtained disc-shaped preform after curing and drying is grooved and perforated on the surface according to the shape of the brake disc to obtain the brake disc blank. Heat dissipation holes are opened around its periphery. The diameter of the holes is smaller than the diameter of the holes in the final brake disc product to facilitate subsequent fine processing.

[0017] S5. The brake disc blank, formed after grooving and perforation, is passed through a mixture of methane and propane or other hydrocarbon gases. The gas flow rate is controlled between 50-300 L / min, and the deposition pressure is controlled between 50 Pa and 10 kPa. A repeated vapor deposition process is performed at 950℃-1800℃ for 200-2000 hours to obtain a density of 1.25 g / cm³. 3 Up to 1.75 g / cm 3 The brake disc blank is then finely processed to form a semi-finished brake disc after vapor deposition and fine processing.

[0018] S6. Using the aforementioned tooling mold, perform a siliconization process on the brake disc semi-finished product: Arrange at least two sets of sliding plates around the brake disc semi-finished product according to the number of heat dissipation holes on its periphery and the diameter of the brake disc semi-finished product, and install insertion sections on the sliding plates corresponding to the position and number of heat dissipation holes to form a complete circular adjustment structure; after laterally adjusting each insertion section on each set of sliding plates, press and insert it into the corresponding heat dissipation holes; before the insertion action, spray a high-temperature release agent on the surface of the insertion section and the sliding plate to facilitate subsequent demolding; after insertion, place the brake disc semi-finished product into a graphite boat dish evenly covered with silicon powder, the silicon powder particle size is controlled at 5μm-1.5mm, and perform a siliconization process at a temperature of 1400℃-1800℃. After reaching the specified siliconization temperature, the silicon infiltration time is controlled at 30min-6h, so that silicon penetrates into the brake disc semi-finished product until, after weighing and density measurement, the density of the brake disc rises to 2g / cm³. 3 -2.8g / cm 3 Between these processes, a siliconized brake disc is obtained;

[0019] S7. After the siliconization process is completed, the T-shaped structure formed by the sliding groove on the connecting rod of the plug segment is pulled out from the heat dissipation hole by stretching. The plug segment is then separated from the sliding plate and falls off in sequence, completing the use of the tooling mold. Finally, the brake disc is weighed, its density is measured, it is finely processed, and a dynamic balance test is conducted to obtain the finished brake disc.

[0020] Furthermore, the silicon powder is doped with other high-temperature resistant powders, including boron nitride, silicon carbide, tungsten carbide, zirconium oxide, aluminum oxide, aluminum nitride, titanium diboride, and iron carbide.

[0021] The present invention has the following advantages over the prior art:

[0022] (1) The method of manufacturing brake disc in this invention firstly involves a resin-cured preform. Once the disc-shaped preform reaches a certain density, machining begins, which reduces the difficulty of opening holes and finishing, and also reduces the time of subsequent vapor deposition and the consumption of raw materials, thereby reducing production costs.

[0023] (2) The tooling mold of this technical solution can adjust the spacing of the plug-in sections loaded on it by means of the sliding plate, so that each plug-in section can form different groups according to the sliding plate. The overall adjustment is flexible, and it can also be used to adjust the spacing in combination for brake discs of different sizes.

[0024] (3) The grouped form of sliding plate and plug-in section can reduce the storage and placement space during use, improve the mold insertion and removal efficiency, and facilitate the operation of operators;

[0025] (4) The plug section is made of ceramic or composite material and is interference fit with the heat dissipation hole, which can reduce the rate of material penetration at high temperature during the siliconization process, which is conducive to the uniformity of product material, ensures the uniformity of expansion coefficient, and reduces the product cracking rate.

[0026] (5) The cooperation between the sliding plate and the insertion section can locate the hole, reduce the problem of uneven stress release on the machined surface during high temperature treatment, ensure the integrity of the hole, and reduce edge collapse, hole collapse and cracks;

[0027] (6) The use of this tooling mold and the method of manufacturing brake discs improve the smoothness of the inner surface of the heat dissipation holes, reduce the amount of post-processing, avoid the generation of silicon marks on the surface of the finished product, and reduce the occurrence of brake disc dynamic imbalance and airflow velocity uniformity imbalance.

[0028] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of the tooling molds for manufacturing brake discs and the semi-finished brake discs according to the present invention.

[0031] Figure 2 A schematic diagram of the usage state in which multiple sets of tooling molds for manufacturing brake discs according to the present invention are installed on the outer periphery of the brake disc semi-finished product and form a surrounding structure.

[0032] Figure 3 This is a schematic diagram of the plug-in segment of the present invention;

[0033] Figure 4 A schematic diagram of the structure of a disk-shaped prefabricated body;

[0034] Figure 5This is a schematic diagram of the brake disc blank.

[0035] The attached diagram lists the components represented by each number as follows:

[0036] 1-Plug-in section, 101-Connecting rod, 102-Slide groove, 2-Slide plate, A-Disc-shaped preform, B-Brake disc blank, 3-Heat dissipation holes, C-Brake disc semi-finished product. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] In the description of this invention, it should be understood that the terms "outer periphery," "end," "inner," etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0039] Please see Figure 1-5 As shown, this invention provides a tooling mold for manufacturing brake discs, used to plug the heat dissipation holes 3 on the outer periphery of a semi-finished brake disc C made of fiber composite material after initial processing and vapor deposition. This embodiment preferably uses a carbon fiber composite disc preform, which undergoes curing, vapor deposition, and siliconization processes to improve the overall material properties of the brake disc. Specifically, the semi-finished brake disc C is formed by grooving and drilling a carbon fiber disc preform A after resin curing, followed by vapor deposition and finishing of the brake disc blank B, resulting in a semi-finished brake disc C with a perforated structure. In this technical solution, the disc preform A has an outer diameter of 350mm, an inner diameter of 200mm, and a thickness of 30mm. The structure of the disc preform A is as follows... Figure 4 As shown, the structure of brake disc blank B is as follows: Figure 5 As shown. Through repeated vapor deposition of the brake disc blank B, after the brake disc blank is densified to a certain density, it undergoes finishing to obtain the semi-finished brake disc C. Only after this step are the tooling dies used in this technical solution for subsequent siliconization processes. The tooling dies include:

[0040] Insertion section 1: Its shape is consistent with the heat dissipation hole 3 opened on the outer periphery of the brake disc semi-finished product C, and it achieves an interference fit after insertion. The end of the insertion section 1 is fixedly connected to the slide groove 102 through the connecting rod 101. In this specific embodiment, the insertion section 1 is preferably made of ceramic material. The slide groove 102 adopts an arc-shaped structure corresponding to the slide plate 2, including an inner retaining and limiting scraping edge that cooperates with the sliding of the slide plate 2.

[0041] Sliding pad 2: It adopts an arc-shaped structure with the same center and uniform thickness as the brake disc semi-finished product C. The sliding pad 2 cooperates with the sliding groove 102 to realize the position adjustment of the insertion section 1. The sliding pad 2 can be made of metal, graphite, ceramic or composite materials. Composite materials include carbon-carbon composite materials and carbon-ceramic composite materials. In this specific embodiment, graphite is preferred.

[0042] A method for manufacturing brake discs using a tooling mold with the aforementioned structure, the method comprising the following steps:

[0043] S1. A disk-shaped preform A made of carbon-carbon composite material;

[0044] S2. The disc preform A is subjected to resin impregnation or spraying to densify it. The resin used is epoxy resin or phenolic resin. In this specific embodiment, phenolic resin is preferably used for impregnation treatment of the preform.

[0045] S3. The obtained disc-shaped preform A, after resin impregnation, is cured and dried to obtain a cured density of 0.4 g / cm³. 3 -1.2 g / cm 3 The preform is a disc-shaped structure. The resin curing process can be divided into room temperature curing and high temperature curing. Room temperature curing occurs at temperatures between 20°C and 80°C, with a curing time between 24 and 48 hours. High temperature curing occurs at temperatures between 200°C and 300°C, with a maximum holding time of 2 to 6 hours. In this specific embodiment, a high temperature curing process is used, with a maximum curing temperature of 250°C and a maximum holding time of 3 hours, resulting in a cured density of 0.7 g / cm³. 3 Circular prefabricated body;

[0046] S4. The obtained disc-shaped preform A, after curing and drying, is grooved and perforated according to the shape of the brake disc to form the brake disc blank B. Heat dissipation holes 3 are opened around the periphery. The diameter of the holes 3 is smaller than the diameter of the holes in the final brake disc product, which facilitates subsequent finishing. The diameter difference can be selected in the range of several millimeters depending on the size of the hole diameter. In this specific embodiment, the difference is 8μm. During machining, since the density of the disc preform A after curing and drying is lower than that of the preform obtained by traditional vapor deposition, the difficulty of perforation and finishing is reduced.

[0047] S5. The brake disc blank B is subjected to repeated vapor deposition processes to obtain a density of 1.25 g / cm³. 3 Up to 1.75 g / cm 3 After the brake disc blank reaches a predetermined density, its shape is refined to form a semi-finished brake disc C. In this specific embodiment, propane gas is used as the deposition gas source, and the deposition pressure is controlled at 4 kPa. Through experiments at different deposition temperatures, deposition times, and gas flow rates, semi-finished brake discs C with different densities were obtained. Since the brake disc blank B has holes, its overall volume is smaller compared to traditional blanks that do not have holes and require vapor phase deposition. Consequently, the subsequent vapor phase deposition time and raw material consumption will be reduced.

[0048] S6. Using the aforementioned tooling mold, perform a siliconization process on the brake disc semi-finished product C: Based on the array of heat dissipation holes 3 on the periphery of the brake disc semi-finished product C and the disc diameter, arrange at least two sets of sliding plates 2 around it, and install insertion segments 1 on the sliding plates 2 corresponding to the position and number of heat dissipation holes 3 to form a complete circular adjustment structure; after laterally adjusting each insertion segment 1 on each set of sliding plates 2, press and insert it into the heat dissipation holes 3 in the correct position; before the insertion action, spray a high-temperature release agent on the surface of the insertion segment 1 and the sliding plate 2. In this specific embodiment, boron nitride is selected to facilitate subsequent demolding; after insertion, place the brake disc semi-finished product C into a graphite boat dish evenly covered with silicon powder, and perform a siliconization process at a certain temperature and time to make the disc density reach 2g / cm³. 3 -2.8g / cm 3 In this specific embodiment, the brake disc semi-finished products C of different densities obtained in step S5 are subjected to a siliconization process. The silicon powder particle size is 1mm, the siliconization process is carried out at 1600℃, and the silicon infiltration time is 2h to complete the siliconization process.

[0049] S7. After the siliconization process is completed, the T-shaped structure formed by the groove 102 on the connecting rod 101 on the plug section 1 is pulled out from the heat dissipation hole 3 by stretching. The plug section 1 is then separated from the slide plate 2 and falls down to complete the use of the tooling mold. Finally, after weighing, density measurement, fine processing and dynamic balance test, the brake disc is made into a finished product.

[0050] In this specific embodiment, the shape of the plug segment 1 is as follows: Figure 3 As shown, the shape is consistent with the heat dissipation hole 3, and an interference fit can be achieved during insertion. The sliding groove 102 on it adopts an arc structure, and a limiting sliding fit is achieved through the limiting scraper and the sliding plate 2 set on it; as Figure 1 As shown, in this specific embodiment, the heat dissipation holes 3 are specifically twenty holes evenly arranged around the periphery of the brake disc semi-finished product C. Correspondingly, under full load, the insertion section 1 is provided with a number corresponding to the heat dissipation holes 3, namely twenty holes, and the arc length of the corresponding sliding piece 2 is 1 / 4, 1 / 5 or other proportions of the brake disc 3, so as to form a complete circular adjustment structure. The thickness of the receiving groove of the upper limit scraping edge of the sliding groove 102 is at least twice the thickness of the sliding piece 2; as Figure 2 The diagram shows the structure of the plug segment 1 and five sliding plates 2 in a fully loaded state. After the plug segment 1 is adjusted laterally on the corresponding sliding plate 2, it is inserted into the corresponding heat dissipation hole 3. At this time, the ends of the adjacent sliding plates 2 are inserted into the receiving grooves of the upper limit scraping edge of the corresponding adjacent sliding groove 102 to achieve a receiving fit. After siliconization is completed, the T-shaped structure formed by the sliding groove 102 on the connecting rod 101 on the plug segment 1 is pulled out from the heat dissipation hole 3 by stretching, and then it is detached from the sliding plate 2 and falls off in sequence.

[0051] The above S5 deposition and S6 siliconization processes were conducted using the following five sets of experiments, all under the following conditions: propane gas was selected as the deposition gas source, the deposition pressure was controlled at 4 kPa, the silicon powder particle size was 1 mm, the siliconization temperature was 1600℃, and the silicon infiltration time was 2 h:

[0052] (1) The maximum temperature for vapor deposition was controlled at 950℃, and the total vapor deposition time was 200h. After weighing and density measurement, the density was found to be 1.13g / cm³. 3 The brake disc semi-finished product C; after vapor deposition, it undergoes a silicide process to improve structural strength, resulting in a density of 1.8 g / cm³. 3 Brake discs;

[0053] In step S7, pulling connector 1 out of the heat dissipation hole 3 requires a force of 10N, but it can be pulled out relatively easily. The brake disc hole is intact without any collapsed edges, the product is free of cracks and silicone marks, and the inner surface of the hole has good smoothness due to the mold plug, without excessive silicone. Appropriate treatment of the inner surface is sufficient; sandblasting and polishing are not required.

[0054] (2) The maximum temperature for vapor deposition was controlled at 1000℃, and the total vapor deposition time was 300h. After weighing and density measurement, the density was found to be 1.38 g / cm³. 3The brake disc semi-finished product C; after vapor deposition, a silicide process is performed to improve structural strength, resulting in a density of 2.18 g / cm³. 3 Brake discs;

[0055] In step S7, pulling the connector 1 out of the heat dissipation hole 3 requires a force of 9N and can be easily pulled out; the brake disc hole is intact without collapsed edges, the product is free of cracks and the surface is free of silicon marks, and the inner surface of the hole has good smoothness due to the mold plug, without being rich in silicon. Appropriate treatment of the inner surface is sufficient, and there is no need to perform sandblasting and polishing processes.

[0056] (3) The maximum temperature for vapor deposition was controlled at 1000℃, and the total vapor deposition time was 500h. After weighing and density measurement, the density reached 1.52g / cm³. 3 The brake disc semi-finished product C; after vapor deposition, a silicide process is performed to improve structural strength, resulting in a density of 2.42 g / cm³. 3 Brake discs;

[0057] In step S7, pulling the connector 1 out of the heat dissipation hole 3 requires a force of 10N, but it can be pulled out relatively easily. The brake disc hole is intact without any collapsed edges, the product is free of cracks and silicon marks on the surface, and the inner surface of the hole has good smoothness due to the mold plug, without silicon enrichment. Appropriate treatment of the inner surface is sufficient; no sandblasting or polishing is required. The maximum vapor deposition temperature is controlled at 1050℃, and the total vapor deposition time is 600 hours. After weighing and density measurement, the density reaches 1.64 g / cm³. 3 Brake disc semi-finished product C; after vapor deposition, it undergoes a silicide process to improve structural strength, resulting in a density of 2.33 g / cm³. 3 Brake discs;

[0058] In step S7, pulling the connector 1 out of the heat dissipation hole 3 requires a force of 6N and can be easily pulled out; the brake disc hole is intact without collapsed edges, the product is free of cracks and the surface is free of silicon marks, and the inner surface of the hole has good smoothness due to the mold plug, without being rich in silicon. Appropriate treatment of the inner surface is sufficient, and there is no need to perform sandblasting and polishing processes.

[0059] (4) The maximum temperature for vapor deposition was controlled at 1050℃, and the total vapor deposition time was 800h. After weighing and density measurement, the density was found to be 1.73 g / cm³. 3 The brake disc semi-finished product C; after vapor deposition, a silicide process is performed to improve structural strength, resulting in a density of 1.92 g / cm³. 3 Brake discs;

[0060] In step S7, pulling the connector 1 out of the heat dissipation hole 3 requires a force of 3N and can be easily pulled out; the brake disc hole is intact without collapsed edges, the product is free of cracks and the surface is free of silicon marks, and the inner surface of the hole has good smoothness due to the mold plug, without being rich in silicon. Appropriate treatment of the inner surface is sufficient, and there is no need to perform sandblasting and polishing processes.

[0061] Based on the above five sets of experiments, a comparative table of experimental data reveals the effects of various parameters on deposition density, silanization density, and mold usage for a brake disc preform with an inner diameter of 200mm, an outer diameter of 350mm, and a thickness of 30mm, when propane is used as the vapor deposition gas. It also shows the influence of the mold and production process on the brake disc's pores and surface. The experimental results demonstrate that each parameter affects the density of the finished brake disc, and a higher density in the semi-finished product after vapor deposition does not necessarily lead to a higher silanization density during the silanization process. Furthermore, it can be seen that the tooling mold sprayed with boron nitride release agent can be easily removed from the brake disc semi-finished product, facilitating operation. Due to the use of this tooling mold and this brake disc production method, the brake disc pores are intact without edge collapse, the product is crack-free, and the surface is free of silicon marks. The inner surface of the pores has good smoothness due to the mold plug, without silicon enrichment; only appropriate treatment of the inner surface is needed, without the need for sandblasting or polishing.

[0062] sequence Deposition temperature (°C) Deposition time (h) Deposition pressure (kPa) Gas flow rate (L / min) <![CDATA[Deposition density (g / cm 3 ).]]> Siliconization temperature (°C) Siliconization time (h) <![CDATA[Siliconization density (g / cm 3 )]]> Tensile load (N) 1 950 200 4 160 1.13 1600 2 1.8 10 2 1000 300 4 180 1.38 1600 2 2.18 9 3 1000 500 4 185 1.52 1600 2 2.42 10 4 1050 600 4 190 1.64 1600 2 2.33 6 5 1050 800 4 210 1.73 1600 2 1.92 3

[0063] In summary, the brake disc manufacturing method in this technical solution first involves curing a preform from resin. Once the disc-shaped preform reaches a certain density, machining begins, reducing the difficulty of drilling and finishing, and decreasing the time and material consumption of subsequent vapor deposition, thus lowering production costs. The tooling mold in this technical solution allows for adjustment of the spacing between the mounting segments via sliding plates, enabling different groups of segments to be formed according to the sliding plates. This provides flexible overall adjustment and allows for combined spacing adjustments for brake discs of different sizes. The grouped arrangement of sliding plates and mounting segments reduces storage and placement space during use, improves mold insertion efficiency, and facilitates operation. The machine is operated by a technician; the plug section is made of ceramic or composite material and is interference-fitted with the heat dissipation holes, which can reduce the rate of material penetration at high temperatures during siliconization, which is conducive to the uniformity of product material, ensures the uniformity of expansion coefficient, and reduces the product cracking rate; the cooperation between the sliding plate and the plug section can position the holes, reduce the problem of uneven stress release on the machined surface during high-temperature treatment, ensure the integrity of the holes, and reduce edge collapse, hole collapse and cracks; the use of this tooling mold and the method of manufacturing brake discs using it improves the smoothness of the inner surface of the heat dissipation holes, reduces the amount of subsequent processing, avoids the generation of silicon marks on the finished product surface, and reduces the occurrence of brake disc dynamic imbalance and airflow velocity imbalance.

[0064] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A tooling mold for manufacturing brake discs, used to plug the heat dissipation holes (3) on the outer periphery of a semi-finished brake disc (C) made of carbon-carbon composite material after initial processing, characterized in that, The tooling mold includes: The plug section (1) has the same shape as the heat dissipation hole (3) on the outer periphery of the brake disc semi-finished product (C), and achieves an interference fit after plugging. The end of the plug section (1) is fixedly connected to the slide groove (102) by the connecting rod (101). Sliding piece (2): It adopts an arc-shaped structure with uniform thickness. The sliding piece (2) cooperates with the sliding groove (102) to realize the position adjustment and free combination of the plug section (1).

2. The tooling mold for manufacturing brake discs according to claim 1, characterized in that, The groove (102) adopts an arc-shaped structure corresponding to the slide plate (2), including an inner retaining scraper that cooperates with the sliding of the slide plate (2).

3. The tooling mold for manufacturing brake discs according to claim 1, characterized in that, The plug section (1) is made of ceramic or composite material; the composite material includes carbon-carbon composite material and carbon-ceramic composite material.

4. A method for manufacturing a brake disc using a tooling mold for brake disc manufacturing, comprising using the tooling mold as described in any one of claims 1-3, characterized in that, The manufacturing method includes the following steps: S1. A disk-shaped preform (A) made of carbon-carbon composite material. S2. The disc-shaped preform (A) is impregnated with resin or sprayed. S3. The disc-shaped preform (A) is cured and dried. The room temperature curing temperature is between 20°C and 80°C, and the curing time is between 24 and 48 hours. The maximum high temperature curing temperature is between 200°C and 300°C, and the maximum temperature holding time is between 2 and 6 hours, resulting in a cured density of 0.4 g / cm³. 3 -1.2 g / cm 3 The disc-shaped prefabricated body (A); S4. The obtained disc-shaped preform (A) after curing and drying is grooved and perforated according to the shape of the brake disc to obtain the brake disc blank (B). Heat dissipation holes (3) are opened around its periphery. The diameter of the holes (3) is smaller than the diameter of the holes in the final brake disc product, which facilitates subsequent fine processing. S5. The brake disc blank (B) formed after grooving and perforation is passed through a mixture of methane and propane or other hydrocarbon gases. The gas flow rate is controlled between 50-300 L / min, and the deposition pressure is controlled between 50 Pa and 10 kPa. A repeated vapor deposition process is carried out at 950℃-1800℃ for 200-2000 hours to obtain a density of 1.25 g / cm³. 3 Up to 1.75 g / cm 3 The brake disc blank is then finely processed to form a semi-finished brake disc (C) after vapor deposition and fine processing. S6. Using the tooling mold, perform siliconization process on the brake disc semi-finished product (C): Arrange at least two sets of sliding plates (2) around the brake disc semi-finished product (C) according to the array of heat dissipation holes (3) on the periphery of the brake disc semi-finished product (C) and the diameter of the brake disc semi-finished product (C), and install the plug segments (1) on the sliding plates (2) corresponding to the position and number of heat dissipation holes (3) to form a complete circular adjustment structure; after adjusting each plug segment (1) on each set of sliding plates (2) laterally, press and insert it into the corresponding heat dissipation holes (3), in Before insertion, a high-temperature release agent is sprayed onto the surfaces of the insertion section (1) and the sliding plate (2) to facilitate subsequent demolding. After insertion, the brake disc semi-finished product (C) is placed in a graphite boat dish uniformly covered with silicon powder. The silicon powder particle size is controlled at 5μm-1.5mm. The siliconization process is carried out at a temperature of 1400℃-1800℃. After reaching the specified siliconization temperature, the silicon infiltration time is controlled at 30min-6h to allow silicon to penetrate into the brake disc semi-finished product (C). After weighing and density measurement, the density of the brake disc rises to 2g / cm³. 3 -2.8g / cm 3 Between these processes, a siliconized brake disc is obtained; S7. After the siliconization process is completed, the T-shaped structure formed by the groove (102) on the connecting rod (101) on the plug section (1) is pulled out from the heat dissipation hole (3) by stretching. The plug section (1) is then separated from the slide (2) and falls off in sequence, completing the use of the tooling mold. Finally, the brake disc is weighed, its density is measured, it is finely processed and subjected to dynamic balance test to obtain the finished brake disc.

5. A method for manufacturing a brake disc using a tooling mold for brake disc manufacturing according to claim 4, characterized in that, The silicon powder is doped with other high-temperature resistant powders, including boron nitride, silicon carbide, tungsten carbide, zirconium oxide, aluminum oxide, aluminum nitride, titanium diboride, and iron carbide.

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