Preparation method of plate blank for brake disc

Abstract

The invention discloses a preparation method of a plate blank for a brake disc, and relates to the technical field of aircraft brake disc manufacturing, a thermal field piece and a disc-shaped tool are combined in a vapor deposition furnace to form a cavity, the disc-shaped tool serves as the bottom of the cavity, the disc-shaped tool is provided with an open hole, and a supporting column tool extending in the vertical direction is arranged in the cavity; the plate prefabricated body is vertically placed in the cavity around the supporting column tool, and the surface of the plate prefabricated body is parallel to the vertical direction, so that an airflow channel is formed in the outer side of the surface of the plate prefabricated body; a gas inlet of the vapor deposition furnace is positioned below the cavity; a plate blank obtained through pre-deposition is taken out of the vapor deposition furnace and then subjected to surface turning; and the plate blank obtained through surface turning is loaded into a vapor deposition furnace to be subjected to densification treatment. The plate preforms are vertically placed and are placed around the supporting column tool, it can be guaranteed that enough space is formed between the plate preforms to serve as an airflow channel, the per unit yield efficiency can be improved, and the manufacturing cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aircraft brake disc manufacturing, in particular to a preparation method of a plate blank for a brake disc. BACKGROUND

[0002] Carbon / carbon composite material is widely used in the braking field due to its excellent performance such as good friction performance, low thermal expansion coefficient, high strength and low density. Preparing carbon / carbon composite material with certain porosity is a key link in the preparation process of carbon / carbon / carbon ceramic brake disc. However, the current preparation method has a long manufacturing cycle, which reduces the production efficiency of carbon ceramic brake disc. In addition, separately preparing carbon / carbon / carbon ceramic brake disc greatly limits the utilization rate of equipment and gas, and affects the equipment productivity. Therefore, under the premise of reducing cost, how to provide a preparation method to make the manufacturing cycle of carbon / carbon / carbon ceramic brake disc shorter and the equipment productivity higher has become a technical problem to be solved by the technical personnel in the field. SUMMARY

[0003] The purpose of the present application is to provide a preparation method of a plate blank for a brake disc, which has a shorter manufacturing cycle and higher equipment productivity.

[0004] To solve the above technical problems, the present application provides a preparation method of a plate blank for a brake disc, comprising:

[0005] The plate blank is prepared by the following steps: a plate precursor and a hot field part are combined and loaded into a gas deposition furnace for pre-deposition; the hot field part and a disc-shaped tooling form a cavity in the gas deposition furnace, the disc-shaped tooling serves as the bottom of the cavity, the disc-shaped tooling has an opening, and the cavity has a support column tooling extending in the vertical direction; the plate precursor is vertically placed in the cavity around the support column tooling, the surface of the plate precursor is parallel to the vertical direction, so that the outer side of the surface of the plate precursor is a gas flow channel; and the gas inlet of the gas deposition furnace is located below the cavity.

[0006] After the plate blank obtained by pre-deposition is taken out from the gas deposition furnace, surface turning is performed.

[0007] The plate blank obtained by surface turning is loaded into the gas deposition furnace for densification treatment.

[0008] Optionally, the densification treatment of the plate blank obtained by surface turning includes:

[0009] The surface-machined plate blank is combined with the hot field part and loaded into a vapor deposition furnace for densification treatment; the hot field part and the disc-shaped tooling form the cavity in the vapor deposition furnace, the plate blank is vertically placed in the cavity around the support column tooling, and the surface of the plate blank is parallel to the vertical direction, so that the outer side of the surface of the plate blank is the airflow channel.

[0010] Optionally, after the surface-machined plate blank is loaded into the vapor deposition furnace for densification treatment, the method further comprises:

[0011] The densified plate blank is loaded into the vapor deposition furnace for at most one densification treatment until the density of the plate blank reaches 1.25 g / cm 3 to 1.60 g / cm 3 .

[0012] Optionally, the disc-shaped tooling is disc-shaped, the support column tooling is located at the center of the disc-shaped tooling, and the plate preform is placed along the radius of the disc-shaped tooling.

[0013] Optionally, the hot field part is any of the following:

[0014] a crucible, a flow guide cylinder, an insulation cylinder, and a straight cylinder type carbon-carbon / graphite tooling.

[0015] Optionally, the state of the hot field part is any of the following:

[0016] a preform, a semi-finished product, and a finished product.

[0017] Optionally, the plate preform is a carbon fiber plate preform, the hot field part is a carbon-carbon hot field part, and the plate blank is a carbon-carbon plate blank.

[0018] Optionally, before the plate preform and the hot field part are combined and loaded into the vapor deposition furnace for pre-deposition, the method further comprises:

[0019] loading the plate preform into a heating furnace for heat treatment; the heat treatment has a treatment time of 1 h to 3 h and a treatment temperature of 1800°C to 2500°C;

[0020] and / or, after the surface-machined plate blank is loaded into the vapor deposition furnace for densification treatment, the method further comprises:

[0021] loading the plate blank into a heating furnace for heat treatment; the heat treatment has a treatment time of 1 h to 3 h and a treatment temperature of 1800°C to 2500°C.

[0022] Optionally, the process parameters of the pre-deposition include:

[0023] The deposition gas is any one or two or more of propylene, propane, hydrogen and nitrogen mixed with natural gas, the volume fraction of the natural gas in the mixture being 50% to 100%; the in-furnace temperature is 800°C to 1200°C; the in-furnace gas pressure is 1 kPa to 15 kPa; the deposition time is 20 h to 360 h;

[0024] And / or, the process parameters of the densification treatment include:

[0025] The deposition gas is any one or two or more of propylene, propane and nitrogen mixed with natural gas, the volume fraction of the natural gas in the mixture being 50% to 100%; the in-furnace temperature is 800°C to 1200°C; the in-furnace gas pressure is 1 kPa to 15 kPa; the deposition time is 60 h to 500 h.

[0026] Optionally, the hot field pieces and the disc-shaped tooling in the vapor deposition furnace are combined to form a plurality of the cavities, the plurality of the cavities are stacked along the vertical direction, the support column tooling extends from the lowermost cavity to the uppermost cavity, the plate preform in each cavity is vertically placed in the cavity around the support column tooling, and the surface of the plate preform is parallel to the vertical direction.

[0027] Optionally, a plurality of the hot field pieces are arranged along the vertical direction, the bottom of the lowermost hot field piece and the top of the uppermost hot field piece are arranged, and the disc-shaped tooling is arranged between adjacent hot field pieces to form a plurality of the cavities stacked along the vertical direction.

[0028] The disc-shaped tooling at the lowermost layer is fixed in the vapor deposition furnace by a hoisting device.

[0029] The preparation method of the plate blank for brake discs provided by the application comprises the following steps: a plate preform and a hot field piece are combined and loaded into a vapor deposition furnace for pre-deposition; the hot field piece and disc-shaped tooling in the vapor deposition furnace are combined to form a cavity, the disc-shaped tooling serves as the bottom of the cavity, the disc-shaped tooling has an opening, and the cavity has a support column tooling extending along the vertical direction; the plate preform is vertically placed in the cavity around the support column tooling, and the surface of the plate preform is parallel to the vertical direction, so that the outside of the surface of the plate preform is a gas flow channel; the gas inlet of the vapor deposition furnace is located below the cavity; the plate blank obtained after pre-deposition is taken out of the vapor deposition furnace and subjected to surface turning; and the plate blank obtained after surface turning is loaded into the vapor deposition furnace for densification treatment.

[0030] By vertically placing the plate preform and placing the plate preform around the support column tool, enough space can be ensured between the plate preforms as air flow channels, so that the carbon-carbon plate blank can be produced in a furnace mode, which is beneficial to improve the yield efficiency, shorten the manufacturing period of the plate blank, and reduce the manufacturing cost under the condition of ensuring the uniformity of carbon-carbon density. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0032] Figure 1 A flow chart of a preparation method of a plate blank for brake disc provided by the embodiments of the present application;

[0033] Figure 2 A front view structural schematic diagram of a gas phase deposition furnace during processing;

[0034] Figure 3 A front view structural schematic diagram of a gas phase deposition furnace during processing; Figure 2

[0035] Figure 4 A flow chart of a preparation method of a plate blank for brake disc provided by the embodiments of the present application;

[0036] Figure 5 A front view structural schematic diagram of a gas phase deposition furnace during processing;

[0037] In the figure: 1. plate preform, 2. hot field, 3. disc-shaped tool, 31. opening, 4. gas phase deposition furnace, 41. gas inlet, 5. support column tool, 6. hoisting device. DETAILED DESCRIPTION

[0038] The core of the present application is to provide a preparation method of a plate blank for brake disc. In the prior art, the current preparation method has a long manufacturing period, which will reduce the production efficiency of carbon ceramic brake disc. In addition, the carbon-carbon / carbon ceramic brake disc is prepared separately, which will greatly limit the utilization rate of equipment and gas, and affect the yield of the equipment.

[0039] ​The preparation method of the plate blank for brake discs provided by the application comprises the following steps: a plate preform and a hot field part are combined and loaded into a vapor deposition furnace for pre-deposition; the hot field part and a disc-shaped tooling form a cavity in the vapor deposition furnace, the disc-shaped tooling serves as the bottom of the cavity, the disc-shaped tooling has an opening, and the cavity has a support column tooling extending in the vertical direction; the plate preform is placed vertically around the support column tooling in the cavity, and the surface of the plate preform is parallel to the vertical direction, so that the outside of the surface of the plate preform is an airflow channel; the gas inlet of the vapor deposition furnace is located below the cavity; the plate blank obtained through pre-deposition is taken out of the vapor deposition furnace and then subjected to surface turning; and the plate blank obtained through surface turning is loaded into the vapor deposition furnace for densification treatment.

[0040] By vertically placing the plate preform and placing the plate preform around the support column tooling, sufficient space can be ensured between the plate preforms as the airflow channel, so that the carbon-carbon plate blank is produced in a furnace mode, and the single yield efficiency is improved, the manufacturing cycle of the plate blank is shortened, and the manufacturing cost is reduced under the condition of ensuring the uniformity of carbon-carbon density.

[0041] In order for those skilled in the art to better understand the present application, the application will be further described in detail below in combination with the drawings and specific embodiments. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0042] Embodiment one

[0043] Please refer to Figures 1 to 3 , Figure 1 The flowchart of the preparation method of the plate blank for brake discs provided by the embodiment of the present application; Figure 2 The front view structural schematic diagram of the vapor deposition furnace during processing; Figure 3 The Figure 2 top view structural schematic diagram.

[0044] Referring to Figure 1 , in the embodiment of the present application, the preparation method of the plate blank for brake discs comprises the following steps:

[0045] S101: a plate preform and a hot field part are combined and loaded into a vapor deposition furnace for pre-deposition.

[0046] Referring to Figure 2 and Figure 3In the embodiment, the hot field part 2 and the disc-shaped tooling 3 form a cavity in the vapor deposition furnace 4, the disc-shaped tooling 3 serves as the bottom of the cavity, the disc-shaped tooling 3 has an opening 31, and the cavity has a support column tooling 5 extending in the vertical direction; the plate preform 1 is vertically placed in the cavity around the support column tooling 5, the surface of the plate preform 1 is parallel to the vertical direction, so that the outside of the surface of the plate preform 1 is a gas flow channel; and the gas inlet 41 of the vapor deposition furnace 4 is located below the cavity.

[0047] The main purpose of the embodiment is to prepare a brake disc for an airplane. At present, the brake disc for an airplane generally includes a carbon-carbon brake disc and a carbon-toughened brake disc. The carbon-carbon brake disc is mainly composed of carbon fibers, graphite carbon and free carbon, all of which are different forms of carbon elements. The carbon-toughened brake disc is prepared on the basis of the carbon-carbon brake disc by adding silicon carbide (SiC) ceramic material. Therefore, the plate blank used for preparing the carbon-carbon brake disc and the carbon-toughened brake disc at present is generally a carbon-carbon plate blank, which is a carbon-carbon composite material. The preparation of the carbon-carbon composite material with a certain porosity is a key link in the preparation process of the carbon-carbon / carbon-toughened brake disc. The plate blank prepared in the embodiment is a carbon-carbon plate blank, which generally needs to go through the processes of pre-deposition, surface machining and densification treatment.

[0048] In the step, the plate preform 1 is a preform for preparing a carbon-carbon composite material, which generally has a circular ring shape. Of course, the appearance of the plate preform 1 is not specifically limited in the embodiment and is determined according to the specific situation. The embodiment finally prepares a carbon-carbon composite material with a certain porosity as a plate blank. The hot field part 2 is a structure part added to ensure that the heat field is more uniform when the vapor deposition furnace 4 heats the plate preform 1. The hot field part 2 can be any one of the following: a crucible, a crucible, a flow guide cylinder, a heat preservation cylinder and a straight cylinder type carbon-carbon / graphite tooling. At the same time, the state of the hot field part in the embodiment is any one of the following: a preform, a semi-finished product and a finished product. The specific structure of the hot field part 2 can be set according to the actual situation, which is not specifically limited here. In the embodiment, the plate preform 1 is generally a carbon fiber plate preform 1, and the hot field part 2 is generally a carbon-carbon hot field part 2. Correspondingly, the plate blank is a carbon-carbon plate blank.

[0049] In the embodiment, the plate preform 1 and the hot field part 2 are combined to form a processing unit and are put into the vapor deposition furnace 4 for processing. In the processing unit, the hot field part 2 generally wraps the plate preform 1, so that the hot field applied to the plate preform 1 is more uniform through the hot field part 2. For example, the crucible is generally in the shape of a bowl, and the plate preform 1 is generally buckled by the crucible and put into the vapor deposition furnace 4 for processing.

[0050] In the embodiment, in addition to the plate preform 1 and the hot field 2, a disc-shaped tool 3 and a support column tool 5 are used to form a processing unit. The hot field 2 and the disc-shaped tool 3 form a cavity, and the support column tool 5 and the plate preform 1 are arranged in the cavity. The support column tool 5 extends in the vertical direction in the cavity, and the plate preform 1 is arranged around the support column tool 5 in the cavity. In the embodiment, the plate preform 1 is also arranged in the vertical direction, that is, the surface of the plate preform 1 is parallel to the vertical direction. When the plate preform 1 is arranged around the support column tool 5, an airflow channel is formed between the plate preforms 1. The airflow channel is formed outside the surface of the plate preform 1 and extends in the vertical direction to allow the deposition gas to flow through the airflow channel and contact the surface of the plate preform 1.

[0051] In the embodiment, the disc-shaped tool 3 has an opening 31, and the cavity at the bottom of the disc-shaped tool 3 also has the opening 31. The deposition gas flows into the cavity through the opening 31 and contacts the plate preform 1 through the airflow channel. In general, the openings 31 are uniformly distributed on the disc-shaped tool 3 to ensure that the deposition gas uniformly flows into the cavity and uniformly contacts the surface of the plate preform 1. The specific arrangement of the openings 31 can be determined according to actual conditions, and is not limited herein.

[0052] In the embodiment, the gas inlet 41 of the vapor deposition furnace 4 is located below the cavity. In operation, the deposition gas enters the vapor deposition furnace 4 from the bottom of the vapor deposition furnace 4, gradually fills the vapor deposition furnace 4 from bottom to top, and flows into the cavity from the bottom of the cavity through the openings of the disc-shaped tool 3, contacts the surface of the plate preform 1 through the airflow channel, and deposits from the surface to the core of the plate preform 1.

[0053] S102: After the plate blank obtained by pre-deposition is taken out of the vapor deposition furnace, surface turning is performed.

[0054] In this step, surface turning is performed on the plate blank after pre-deposition to obtain a predetermined surface structure. The specific content of surface turning can be determined according to actual conditions, and is not limited herein. In this step, the machining amount of surface turning is generally 0.5 mm to 5 mm.

[0055] S103: The plate blank obtained by surface turning is loaded into the vapor deposition furnace for densification treatment.

[0056] In this step, the surface machined plate blank is re-placed into the vapor deposition furnace 4 for densification treatment. The plate blank is placed in the vapor deposition furnace 4 in the same way as described in S101 or in a different way. The plate blank can be placed horizontally, and adjacent stacked plate blanks are separated by paper or other structures. The plate blank can also be placed in the vapor deposition furnace 4 as described in S101. The specific content will be described in detail in the following embodiments, and will not be described here.

[0057] The preparation method of the plate blank for brake disc provided by the embodiment of the application can ensure that the plate preforms 1 have sufficient space as airflow channels by vertically placing the plate preforms 1 around the support column tool 5, and can produce carbon-carbon plate blanks in a furnace manner, which is beneficial to improving the yield efficiency, shortening the manufacturing cycle of the plate blank, and reducing the manufacturing cost while ensuring the uniformity of carbon-carbon density.

[0058] The specific content of the preparation method of the plate blank for brake disc provided by the application will be described in detail in the following embodiments.

[0059] Embodiment two

[0060] Please refer to Figure 4 and Figure 5 , Figure 4 is a flow chart of a specific preparation method of a plate blank for brake disc provided by the embodiment of the application. Figure 5 is a specific front view structure diagram of the vapor deposition furnace during processing.

[0061] See Figure 4 In the embodiment of the application, the preparation method of the plate blank for brake disc comprises:

[0062] S201: The plate preform is loaded into a heating furnace for heat treatment.

[0063] In this embodiment, the heat treatment time is usually 1h to 3h, and the treatment temperature is usually 1800℃ to 2500℃. The above-mentioned heating furnace can be a graphitization furnace in this embodiment. The plate preform 1 is pre-heat treated in the graphitization furnace, which can solidify the plate such as carbon fiber preform. The graphitization furnace needs to be high-temperature heat treated, and the treatment temperature is usually 1800℃ to 2500℃, and the treatment time is usually 1h to 3h.

[0064] S202: The plate preform is combined with the hot field part and loaded into the vapor deposition furnace for pre-deposition.

[0065] The step is basically the same as S101, and in this step, the plate preform 1 is loaded into the cavity formed by the hot field 2 and the disc-shaped tooling, and pre-deposition is performed in the vapor deposition furnace 4. Specifically, in this embodiment, the disc-shaped tooling 3 is disc-shaped, the support column tooling 5 is located at the center of the disc-shaped tooling 3, and the plate preform 1 is placed along the radius of the disc-shaped tooling 3. That is, the support column tooling 5 is located at the center of the cavity, and the plate preform 1 is specifically arranged along the radial direction, so that the plate preform 1 is vertically placed in the cavity around the support column tooling 5. This structure can ensure that the surface of the plate preform 1 is not in contact with the adjacent plate preform 1 everywhere, so as to ensure the uniformity of the deposition on the surface of the plate preform 1.

[0066] Referring to Figure 5 Further, in this embodiment, the hot field 2 and the disc-shaped tooling 3 in the vapor deposition furnace 4 form a plurality of cavities, and the plurality of cavities are stacked along the vertical direction. The support column tooling 5 extends from the lowermost cavity to the uppermost cavity, and the plate preform 1 in each cavity is vertically placed around the support column tooling 5 in the cavity, and the surface of the plate preform 1 is parallel to the vertical direction.

[0067] That is, in this embodiment, a plurality of processing units can be provided in the vapor deposition furnace 4 at the same time, each processing unit including a cavity formed by the hot field 2 and the disc-shaped tooling 3. The plurality of cavities are stacked along the thickness direction, and the support column tooling 5 extends from the lowermost cavity to the uppermost cavity to support and prevent the cavities from collapsing. In each cavity, a plate preform 1 is usually placed, and the plate preform 1 in each cavity is vertically placed and arranged around the support column tooling 5. The above-mentioned plate preform 1 can be arranged along the radial direction of the circular disc-shaped tooling 3. The above-mentioned stacked structure can greatly increase the number of plate preforms 1 pre-deposited at a time, thereby improving the preparation efficiency and reducing the preparation cost.

[0068] Specifically, in this embodiment, a plurality of hot fields 2 are arranged along the vertical direction, and the bottom of the lowermost hot field 2 and the top of the uppermost hot field 2 are provided with the disc-shaped tooling 3 to form a plurality of cavities stacked along the vertical direction.

[0069] That is, in the embodiment, the machining unit can be fixed in the phase deposition furnace by the lifting device 6, and generally only the lifting device 6 needs to be arranged on the lowermost disc-shaped tooling 3 to lift the entire stacked structure in the gas phase deposition furnace 4. In the embodiment, when the hot field piece 2 is generally used as the side wall structure of the cavity, the cavities stacked in the thickness direction can be formed by the disc-shaped tooling 3 and the hot field piece 2 arranged alternately in the embodiment, and at this time, the disc-shaped tooling 3 between the two adjacent cavities in the upper and lower directions is shared as the bottom structure of the upper cavity and the top structure of the lower cavity. The disc-shaped tooling 3 needs to be arranged at the bottom of the lowermost hot field piece 2 and connected with the lifting device 6, and the lifting device 6 is fixedly connected with the gas phase deposition furnace 4. The disc-shaped tooling 3 also needs to be arranged at the top of the uppermost hot field piece 2 to ensure that the heating environment of the plate preform 1 in any cavity is generally the same.

[0070] In the embodiment, the pre-deposition process parameters include that the deposition gas is any one or two or more than two of propylene, propane, hydrogen and nitrogen mixed with natural gas, the volume fraction of the natural gas in the mixed gas is 50% to 100%; the furnace temperature is 800°C to 1200°C; the furnace pressure is 1kPa to 15kPa; the deposition time is 20h to 360h; of course, the specific values of the pre-deposition process can be set by the actual situation, which is not limited here.

[0071] S203: After the plate blank obtained by pre-deposition is taken out from the gas phase deposition furnace, surface turning is performed.

[0072] The step is basically the same as S102 in the above embodiment, and the details are referred to the above embodiment, which will not be repeated here.

[0073] S204: The plate blank obtained by surface turning is combined with the hot field piece and loaded into the gas phase deposition furnace for densification treatment.

[0074] In the embodiment, the hot field piece 2 and the disc-shaped tooling 3 form the cavity in the gas phase deposition furnace 4, the plate blank is vertically placed in the cavity around the support column tooling 5, the surface of the plate blank is parallel to the vertical direction, so that the outside of the surface of the plate blank is the gas flow channel. That is, the structure in the gas phase deposition furnace 4 during the densification treatment can be the same as or similar to the structure in the gas phase deposition furnace 4 during the pre-deposition, and the details are referred to the above content, which will not be repeated here.

[0075] In the embodiment, the process parameters of the densification treatment generally include: the deposition gas is any one or two or more of propylene, propane and nitrogen mixed with natural gas, the volume fraction of the natural gas in the mixed gas is 50% to 100%; the in-furnace temperature is 800 to 1200 degrees Celsius; the in-furnace gas pressure is 1 to 15 kPa; and the deposition time is 60 to 500 hours. Of course, the specific values of the densification process can be set according to actual conditions, and are not limited here.

[0076] S205: loading the plate blank obtained by the densification treatment into the vapor deposition furnace for at most one time of densification treatment.

[0077] Optionally, in the embodiment, the plate blank can be additionally subjected to at most one time of densification treatment, i.e., at most two times of densification treatment in total. The specific content of the densification treatment has been described in the above paragraphs, and will not be repeated here. In the embodiment, the density of the plate blank is generally adjusted to 1.25 g / cm 3 to 1.60 g / cm 3 by the additional densification treatment. 3 3

[0078] S205: loading the plate blank into the heating furnace for heat treatment.

[0079] In the embodiment, the heat treatment time is 1 to 3 hours, and the treatment temperature is 1800 to 2500 degrees Celsius. The heating furnace can generally be a graphitization furnace, and the purpose of the heat treatment of the plate blank in the step is to adjust the thermal conductivity of the plate blank to meet the preset requirements. The graphitization furnace generally needs to be subjected to high-temperature heat treatment, and the treatment temperature is generally 1800 to 2500 degrees Celsius, and the treatment time is generally 1 to 3 hours.

[0080] The preparation method of the plate blank for brake disc provided by the embodiment can stack a plurality of cavities in the vapor deposition furnace 4 to simultaneously process more plate preforms 1, thereby further improving the yield efficiency, shortening the manufacturing cycle of the plate blank, and reducing the manufacturing cost.

[0081] The embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts of each embodiment can be referred to each other.

[0082] ​​Those skilled in the art will further appreciate that the functions of the various examples illustrated in the several embodiments disclosed herein can be implemented using electronic hardware, a combination of software and electronics, or software only. To clearly illustrate this interchangeability of hardware and software, various components will be described generally, in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system. Skilled artisans can implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

[0083] The steps of a method or algorithm described in connection with the embodiments disclosed herein can be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module can reside in RAM, flash memory, ROM, electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. The storage medium can be coupled to the processor such that the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium can be integral to the processor. The processor and the storage medium can reside in an ASIC.

[0084] In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the application can be practiced without these specific details. In other instances, well-known methods, structures and techniques have not been described in detail in order to avoid obscuring the description.

[0085] The above has carried on the detailed introduction to the preparation method of the plate blank for brake disc provided by the present application. The principle and implementation mode of the present application are described by applying specific examples in the present text, and the above example description is only for helping to understand the method of the present application and its core idea. It should be pointed out that, for the ordinary skilled in the art, some improvements and modifications can be made to the present application without departing from the principle of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A method of producing a blank of sheet material for brake discs, characterized in that, The method comprises the following steps: a plate preform is combined with a thermal field element and loaded into a vapor deposition furnace for pre-deposition; the thermal field element and a disc-shaped tool form a cavity in the vapor deposition furnace, the disc-shaped tool serving as the bottom of the cavity, the disc-shaped tool having an opening, and the cavity having a support column tool extending in a vertical direction; the plate preform is vertically placed in the cavity around the support column tool, the surface of the plate preform being parallel to the vertical direction so that the outside of the surface of the plate preform is a gas flow channel; and an air inlet of the vapor deposition furnace is located below the cavity; the plate blank obtained by pre-deposition is taken out of the vapor deposition furnace and subjected to surface turning; the plate blank obtained by surface turning is loaded into the vapor deposition furnace for densification treatment.

2. The method of claim 1, wherein, The densification treatment of the plate blank obtained by surface turning comprises: the plate blank obtained by surface turning is combined with a thermal field element and loaded into a vapor deposition furnace for densification treatment; the thermal field element and the disc-shaped tool form the cavity in the vapor deposition furnace, and the plate blank is vertically placed in the cavity around the support column tool, the surface of the plate blank being parallel to the vertical direction so that the outside of the surface of the plate blank is the gas flow channel.

3. The method of claim 1, wherein, After the plate blank obtained by surface turning is loaded into the vapor deposition furnace for densification treatment, the method further comprises: the plate blank obtained by densification treatment is loaded into the vapor deposition furnace for at most one more densification treatment.

4. The method of claim 1, wherein, The disc-shaped tool is in the shape of a disc, the support column tool is located at the center of the disc-shaped tool, and the plate preform is placed along the radius of the disc-shaped tool.

5. The method of claim 1, wherein, The thermal field element is any one of the following: a crucible, a flow guide cylinder, a heat preservation cylinder, and a straight cylinder type carbon-carbon / graphite tool.

6. The method of claim 1, wherein, The state of the thermal field element is any one of the following: a preform, a semi-finished product, and a finished product.

7. The method of claim 1, wherein, The plate preform is a carbon fiber plate preform, the thermal field element is a carbon-carbon thermal field element, and the plate blank is a carbon-carbon plate blank.

8. The method of claim 1, wherein, Before the plate preform is combined with the thermal field element and loaded into the vapor deposition furnace for pre-deposition, the method further comprises: the plate preform is loaded into a heating furnace for heat treatment; the heat treatment has a treatment time of 1h to 3h and a treatment temperature of 1800℃ to 2500℃; and / or, after the plate blank obtained by surface turning is loaded into the vapor deposition furnace for densification treatment, the method further comprises: the plate blank is loaded into a heating furnace for heat treatment; the heat treatment has a treatment time of 1h to 3h and a treatment temperature of 1800℃ to 2500℃.

9. The method of claim 1, wherein, The process parameters of the pre-deposition include: the deposition gas is any one or two or more of propylene, propane, hydrogen, and nitrogen mixed with natural gas, the volume fraction of the natural gas in the mixed gas being 50% to 100%; the furnace temperature is 800℃ to 1200℃; the furnace pressure is 1kPa to 15kPa; and the deposition time is 20h to 360h; and / or, the process parameters of the densification treatment include: The deposition gas is a mixture of any one or more than two of propylene, propane and nitrogen and natural gas, the volume fraction of the natural gas in the mixture being 50% to 100%; the temperature in the furnace is 800°C to 1200°C; the gas pressure in the furnace is 1kPa to 15kPa; the deposition time is 60h to 500h.

10. The method according to any one of claims 1 to 9, characterized in that, The hot field pieces and the disc-shaped tooling in the vapor deposition furnace form a plurality of the cavities, the plurality of the cavities are stacked along the vertical direction, the support column tooling extends from the cavity in the lowermost layer to the cavity in the uppermost layer, the plate preform in each of the cavities is vertically placed in the cavity around the support column tooling, and the surface of the plate preform is parallel to the vertical direction.

11. The method of claim 10, wherein, A plurality of the hot field pieces are arranged along the vertical direction, the bottom of the hot field piece in the lowermost layer and the top of the hot field piece in the uppermost layer, and the disc-shaped tooling is arranged between adjacent hot field pieces to form a plurality of the cavities stacked along the vertical direction. The disc-shaped tooling in the lowermost layer is fixed in the vapor deposition furnace by a hoisting device.

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