Preparation tool and preparation method of multi-union guide blade coating

Abstract

The invention relates to a preparation tool and a preparation method of a multi-union guide blade coating. Comprising an edge plate coating tool and a blade body coating tool. The margin plate coating tool comprises a first connecting rod, a side face connecting frame and a first mounting plate protection shell, the first mounting plate protection shell is connected with the first connecting rod through the side face connecting frame, and the first connecting rod is parallel to the first mounting plate protection shell; the blade body coating tool comprises a second connecting rod and a second mounting plate protection shell, and the second mounting plate protection shell is perpendicularly connected with the first connecting rod. The bonding strength of the coating at the position of the margin plate of the guide blade is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal barrier coatings, and in particular to a preparation tool for a multi-guide vane coating and a coating preparation method. Background Art

[0002] Existing methods and equipment for thermal barrier coatings primarily include plasma spraying (APS) and electron beam physical vapor deposition (EB-PVD). Compared to the lamellar coatings produced by plasma spraying, EB-PVD, as an advanced ceramic coating preparation process, offers superior bonding strength, ensuring the longevity of blade coatings. Therefore, most turbine blades are coated with EB-PVD ceramic coatings. As the operating temperature of engine blades gradually increases, the requirements for blade thermal insulation performance are further increased, placing even higher demands on blade service life. Many guide vanes are also coated with EB-PVD ceramic coatings. However, due to the unique structure of guide vanes, it is impossible to coat both the blade body and the blade edge. To ensure the bonding strength of the blade body coating, the blade edge is generally omitted. However, the operating environment of guide vanes dictates that the blade edge also requires protection. A blade without coating protection will affect the overall service life of the guide vanes. In view of this, a preparation tool and coating method for multiple guide vane coatings are provided. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a tool and method for preparing coatings for multiple guide vanes, with the aim of improving the bonding strength of the coatings at the edge plates of the guide vanes.

[0004] The technical solution of the present invention to solve the above technical problems is as follows:

[0005] In a first aspect, a tool for preparing a coating for a multi-link guide vane includes a tool for coating an edge plate and a tool for coating a blade body;

[0006] The edge plate coating tooling includes a first connecting rod, a side connecting frame and a first mounting plate protective shell, wherein the first mounting plate protective shell is connected to the first connecting rod via the side connecting frame, and the first connecting rod is parallel to the first mounting plate protective shell;

[0007] The blade coating tooling includes a second connecting rod and a second mounting plate protective shell, and the second mounting plate protective shell is vertically connected to the first connecting rod.

[0008] The beneficial effects of the present invention are as follows: by adopting the edge plate coating tooling, the edge plate position of the multi-joint guide blades of the aircraft engine is made to have a large angle with the steam flow direction, which can ensure that the edge plate position of the multi-joint guide blade faces the ceramic target to receive steam particles, and ensure that the blade edge plate is consistent with the blade body state during the PVD coating process, thereby forming a vertical columnar crystal structure, thereby improving the bonding strength; by adopting the blade body coating tooling, uniform coating of the blade body coating can be achieved; through the application of the edge plate coating tooling and the blade body coating tooling, the bonding strength of the edge plate coating of the multi-joint guide blade can be improved, and the overall service life of the blade can be improved, thereby enhancing the competitiveness of China's aircraft engine blades.

[0009] On the basis of the above technical solution, the present invention can also be improved as follows.

[0010] Furthermore, the first mounting plate protective shell includes a first large mounting plate protective shell and a first small mounting plate protective shell used in conjunction with the first large mounting plate protective shell, the first large mounting plate protective shell is connected to the first connecting rod through the side connecting frame, and the first connecting rod is parallel to the first small mounting plate protective shell.

[0011] The beneficial effects of adopting the above-mentioned further scheme are: the first large mounting plate protective shell and the first small mounting plate protective shell are used to protect the non-coated area of ​​the blade, and the side connecting frame is used to connect the first large mounting plate protective shell and the first connecting rod, and the first connecting rod is connected in parallel to the first small mounting plate protective shell, so as to ensure that when applying the ceramic coating, there is an incident angle between the gas phase ceramic particle flow and the edge plate position, ensuring the lateral rotation of the blade and growing into a vertical columnar crystal structure, thereby improving the bonding strength of the coating at the edge plate position; the first connecting rod is connected to the main shaft of the EB-PVD equipment (electron beam physical vapor deposition equipment) by a mortise and tenon joint, which is used for self-rotation in the lateral direction of the blade to achieve uniform coating of the coating at the edge plate position.

[0012] Furthermore, the first connecting rod is connected to the side connecting frame by welding; the side connecting frame is connected to the first small mounting plate protective shell by welding; the first connecting rod is connected to the main shaft of the equipment by mortise and tenon; the first small mounting plate protective shell is provided with a profile matching the shape of the multi-jointed guide blade and a first positioning boss, and the first large mounting plate protective shell is provided with a profile matching the shape of the multi-jointed guide blade and a second positioning boss.

[0013] Furthermore, the second mounting plate protective shell includes a second large mounting plate protective shell and a second small mounting plate protective shell used in conjunction with the second large mounting plate protective shell, and the second large mounting plate protective shell is vertically connected to the second connecting rod (for example, welded).

[0014] The beneficial effects of adopting the above-mentioned further scheme are: the second large mounting plate protective shell and the second small mounting plate protective shell are used to protect the non-coated area of ​​the blade, and the second connecting rod is connected to the main shaft of the EB-PVD equipment through a mortise and tenon joint. On the one hand, the vertical incidence ensures that when applying the ceramic coating, the angle between the gas phase ceramic particle flow and the blade can grow into a vertical columnar crystal structure, thereby ensuring the bonding strength of the coating at the blade position; on the other hand, it is used for the rotation of the blade to achieve uniform coating of the blade coating.

[0015] Furthermore, the second connecting rod is connected to the second large mounting plate protective shell by welding; the second connecting rod is connected to the main shaft of the equipment by mortise and tenon; the second small mounting plate protective shell is provided with a profile matching the shape of the multi-jointed guide blade and a third positioning boss, and the second large mounting plate protective shell is provided with a profile matching the shape of the multi-jointed guide blade and a fourth positioning boss.

[0016] In a second aspect, a method for preparing a coating for a multi-joint guide vane is provided, based on a tool for preparing the coating for a multi-joint guide vane, comprising the following steps:

[0017] (1) using an edge plate coating tool to deposit a ceramic coating on the edge plate position of a multi-joint guide blade, thereby obtaining a multi-joint guide blade with a coating deposited on the edge plate position;

[0018] (2) The blade surface of the multi-joint guide blade with the coating deposited at the edge plate position is sandblasted to remove the coating with low bonding strength at the blade position, and then the blade coating tool is used to deposit the ceramic coating at the blade position of the multi-joint guide blade at the edge plate position, thereby forming the ceramic coating deposition at the edge plate position and the blade position of the multi-joint guide blade.

[0019] The beneficial effects of the present invention are: a two-step coating process is used to prepare the coating, that is, the ceramic coating is deposited in a two-step furnace. First, by adopting an edge plate coating tooling, the edge plate position of the multi-joint guide blades of the aircraft engine is made to have a large angle with the steam flow direction, which can ensure that the edge plate position of the multi-joint guide blade faces the ceramic target to receive steam particles, and ensure that the blade edge plate is consistent with the blade body state during the PVD coating process, forming a vertical columnar crystal structure, thereby improving the bonding strength; then, by adopting a blade body coating tooling, uniform coating of the blade body coating is achieved; by improving the bonding strength of the edge plate coating of the multi-joint guide blade, the overall service life of the blade is improved, thereby enhancing the competitiveness of China's aircraft engine blades.

[0020] Furthermore, the ceramic coating deposition in step (1) and step (2) is carried out by electron beam physical vapor deposition.

[0021] Furthermore, the ceramic coating is a coating of at least one of zirconium oxide and rare earth zirconate; the number of layers of the ceramic coating is single, double, or multi-layer; and the thickness of the ceramic coating can be directly set as needed.

[0022] Furthermore, step (1) includes the following specific steps:

[0023] (1-1) Installation of the edge plate coating tooling: Install the multi-jointed guide blades to be treated between the first large mounting plate protective shell and the first small mounting plate protective shell, secure the first large mounting plate protective shell to the first small mounting plate, and then insert the first connecting rod into the inner hole of the main shaft of the deposition device to complete the tooling installation;

[0024] (1-2) Ceramic coating deposition at the edge of the multi-guide vane:

[0025] The multi-link guide blade to be processed is preheated to 900°C~950°C by an electron beam heating gun, and the electron beam evaporation gun is turned on to evaporate the ceramic target material into a gaseous target material. The formed gas cloud wraps the multi-link guide blade to be processed, and the gaseous target material nucleates and grows at the edge plate position of the multi-link guide blade to form a columnar crystal ceramic coating. Under the protection of the edge plate coating tooling, the multi-link guide blade is rotated by the main shaft of the deposition device to ensure the thickness and uniformity of the deposited coating at the edge plate position of the multi-link guide blade; the parameters of the ceramic coating deposition are: the power supply of the electron beam gun is 18KV~20KV, the current of the heating gun is 0.2A~0.3A, the current of the evaporation gun is 1.2A~1.8A, and the rotation speed of the multi-link guide blade is 20r / min~40r / min.

[0026] Furthermore, step (2) includes the following specific steps:

[0027] (2-1) sandblasting the blade surface of the multi-joint guide blade with the coating deposited at the edge plate position to remove the ceramic coating with low bonding strength at the blade position;

[0028] (2-2) Installation of the blade coating tooling: Install the multi-jointed guide blades for coating deposition at the edge plate position between the second large mounting plate protective shell and the second small mounting plate protective shell, fix the second large mounting plate protective shell and the second small mounting plate protective shell, and then insert the second connecting rod into the inner hole of the main shaft of the deposition device to complete the installation of the tooling;

[0029] (2-3) Deposition of ceramic coating at the blade body position of the multi-joint guide blade: preheat the multi-joint guide blade with the coating deposited at the edge plate position to 900°C~950°C by an electron beam heating gun, turn on the electron beam evaporation gun, evaporate the ceramic target material into a gaseous target material, and the formed gas cloud wraps the multi-joint guide blade with the coating deposited at the edge plate position. The gaseous target material nucleates and grows into a columnar crystal ceramic coating at the blade body position of the multi-joint guide blade with the coating deposited at the edge plate position. Under the protection of the blade body coating tooling, the main shaft rotates to ensure the thickness and uniformity of the coating deposited at the blade body position of the multi-joint guide blade with the coating deposited at the edge plate position; parameters for ceramic coating deposition: the power supply of the electron beam gun is 18KV~20KV, the current of the heating gun is 0.2A~0.3A, the current of the evaporation gun is 1.2A~1.8A, and the rotation speed is 20r / min~40r / min. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic structural diagram of the blade coating tooling of the present invention;

[0031] Figure 2 This is a schematic structural diagram of the edge plate coating tooling of the present invention;

[0032] Figure 3 This is a two-step process flow chart of the present invention;

[0033] Figure 4 This is a comparison chart of the appearance of coatings prepared by different process methods of the present invention;

[0034] Figure 5 This is a comparison chart of the coating structures at the edge plate position prepared by different process methods of the present invention;

[0035] Figure 6 A comparison of the sandblasting of the coating at the edge plate position prepared by different process methods of the present invention.

[0036] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0037] 1-Second small mounting plate protective shell, 2-Second large mounting plate protective shell, 3-Second connecting rod, 4-First small mounting plate protective shell, 5-First large mounting plate protective shell, 6-Side connecting frame, 7-First connecting rod. DETAILED DESCRIPTION

[0038] The principles and features of the present invention are described below. The examples are only used to explain the present invention and are not intended to limit the scope of the present invention. Where specific techniques or conditions are not specified in the examples, the techniques or conditions described in the literature in this field or the product instructions are used. Where the manufacturers of the reagents or instruments used are not specified, they are all conventional products that can be purchased through regular channels.

[0039] Example

[0040] This embodiment relates to a preparation tool for coating multiple guide vanes, including a blade coating tool and a blade body coating tool ( Figure 1 and 2 );

[0041] The edge plate coating tooling includes a first connecting rod 7, a side connecting frame 6 and a first mounting plate protective shell. The first mounting plate protective shell is connected to the first connecting rod 7 via the side connecting frame 6. The first connecting rod 7 is parallel to the first mounting plate protective shell.

[0042] The blade coating tooling includes a second connecting rod 3 and a second mounting plate protective shell, and the second mounting plate protective shell is vertically connected to the first connecting rod 7.

[0043] By adopting the edge plate coating tooling, the edge plate position of the multi-unit guide blades of the aircraft engine is made to have a large angle with the steam flow direction, which can ensure that the edge plate position of the multi-unit guide blade faces the ceramic target to receive steam particles, and ensure that the blade edge plate is consistent with the blade body during the PVD coating process, forming a vertical columnar crystal structure, thereby improving the bonding strength; by adopting the blade body coating tooling, the blade body coating can be uniformly coated; through the application of the edge plate coating tooling and the blade body coating tooling, the bonding strength of the edge plate coating of the multi-unit guide blade can be improved, and the overall service life of the blade can be improved, thereby enhancing the competitiveness of China's aircraft engine blades.

[0044] In the preferred embodiment of the present invention, the first mounting plate protective shell includes a first large mounting plate protective shell 5 and a first small mounting plate protective shell 4 used in conjunction with the first large mounting plate protective shell 5. The first large mounting plate protective shell 5 is connected to the first connecting rod 7 via the side connecting frame 6, and the first connecting rod 7 is parallel to the first small mounting plate protective shell 4. The first large mounting plate protective shell 5 and the first small mounting plate protective shell 4 are used to protect the non-coated area of ​​the blade, and the side connecting frame 6 is used to connect the first large mounting plate protective shell 5 and the first connecting rod 7, and the first connecting rod 7 is connected in parallel to the first small mounting plate protective shell 4, thereby ensuring that when applying the ceramic coating, the vapor-phase ceramic particle flow has an incident angle with the edge plate position, ensuring that the blade rotates sideways and can grow into a vertical columnar crystal structure, thereby improving the bonding strength of the coating at the edge plate position; the first connecting rod 7 is connected to the main shaft of the EB-PVD equipment (electron beam physical vapor deposition equipment) by a mortise and tenon joint, and is used for self-rotation in the lateral direction of the blade to achieve uniform coating of the coating at the edge plate position.

[0045] Preferably, in this embodiment, the first connecting rod 7 is connected to the side connecting frame 6 by welding; the side connecting frame 6 is connected to the first small mounting plate protective shell 4 by welding; the first small mounting plate protective shell 4 is provided with a profile matching the shape of the multi-jointed guide blade and a first positioning boss to ensure that the protective shell is completely flush with the non-coated area of ​​the blade, and the first large mounting plate protective shell 5 is provided with a profile matching the shape of the multi-jointed guide blade and a second positioning boss to ensure that the protective shell is completely flush with the non-coated area of ​​the blade; the large and small mounting plates are fixed by binding with nickel-chromium wire.

[0046] In this preferred embodiment, the second mounting plate protective housing includes a second large mounting plate protective housing 2 and a second small mounting plate protective housing 1 used in conjunction with the second large mounting plate protective housing 2. The second large mounting plate protective housing 2 is vertically welded to the second connecting rod 3. The second connecting rod 3 is welded to the second large mounting plate protective housing 2; the second connecting rod 3 is connected to the main shaft of the equipment by a mortise and tenon joint; the second small mounting plate protective housing 1 is provided with a profile matching the shape of the multi-jointed guide blades and a third positioning boss to ensure that the protective housing is completely flush with the non-coated area of ​​the blades; the second large mounting plate protective housing 2 is provided with a profile matching the shape of the multi-jointed guide blades and a fourth positioning boss to ensure that the protective housing is completely flush with the non-coated area of ​​the blades; the large and small mounting plates are bound and fixed by nickel-chromium wire. The second large mounting plate protective shell 2 and the second small mounting plate protective shell 1 are used to protect the non-coated area of ​​the blade. The second connecting rod 3 is connected to the main shaft of the EB-PVD equipment through a mortise and tenon joint. On the one hand, the vertical incidence ensures that when applying the ceramic coating, the angle between the gas phase ceramic particle flow and the blade can grow into a vertical columnar crystal structure, thereby ensuring the bonding strength of the coating at the blade position. On the other hand, it is used for the rotation of the blade to achieve uniform coating of the blade coating.

[0047] This embodiment also relates to a method for preparing a coating for a multi-link guide blade, based on a preparation tool for the coating for a multi-link guide blade, comprising the following steps: Figure 3 ):

[0048] (1) Using an edge plate coating tool to deposit a ceramic coating on the edge plate position of a multi-joint guide blade, thereby obtaining a multi-joint guide blade deposited at the edge plate position;

[0049] (2) The blade surface of the multi-joint guide blade deposited at the edge plate position is sandblasted to remove the coating with low bonding strength at the blade position, and then the blade coating tool is used to deposit the ceramic coating at the blade position of the multi-joint guide blade at the edge plate position, thereby forming the ceramic coating deposition at the edge plate position and the blade position of the multi-joint guide blade.

[0050] The two-step process for preparing the coating of the present invention is to deposit the ceramic coating in a furnace in two steps. First, by adopting an edge plate coating tool, the edge plate position of the multi-joint guide blades of the aircraft engine is made to have a large angle with the steam flow direction, which can ensure that the edge plate position of the multi-joint guide blade faces the ceramic target to receive steam particles, and ensure that the blade edge plate is consistent with the blade body state during the PVD coating process, forming a vertical columnar crystal structure, thereby improving the bonding strength; then, by adopting a blade body coating tool, uniform coating of the blade body coating is achieved; through the application of the edge plate coating tool and the blade body coating tool, the bonding strength of the edge plate coating of the multi-joint guide blade can be improved, and the overall service life of the blade can be improved, thereby enhancing the competitiveness of China's aircraft engine blades.

[0051] In this embodiment, the ceramic coating is preferably deposited in steps (1) and (2) using electron beam physical vapor deposition. The ceramic coating is a coating of at least one of zirconium oxide and rare earth zirconate; and the number of layers of the ceramic coating is single, double, or multilayer.

[0052] In this embodiment, step (1) preferably includes the following specific steps:

[0053] (1-1) Installation of the edge plate coating tooling: The sandblasted multi-jointed guide blades to be treated are installed between the first large mounting plate protective shell 5 and the first small mounting plate protective shell 4. The profile and positioning blocks ensure that the non-coated area of ​​the blades is completely protected within the mounting plate protective shells. The first large mounting plate protective shell 5 and the first small mounting plate are tied and fixed with nickel-chromium wire. The first connecting rod 7 is then inserted into the inner hole of the main shaft of the deposition device and fixed with a pin, thereby connecting to the main shaft of the electron beam physical vapor deposition equipment to complete the installation of the tooling;

[0054] (1-2) Ceramic coating deposition at the edge of the multi-guide vane:

[0055] The multi-link guide blade to be processed is preheated to 900°C~950°C by an electron beam heating gun, and the electron beam evaporation gun is turned on to evaporate the ceramic target material into a gaseous target material. The formed gas cloud wraps the multi-link guide blade to be processed, and the gaseous target material nucleates and grows at the edge plate position of the multi-link guide blade to form a columnar crystal ceramic coating. Under the protection of the edge plate coating tooling, the multi-link guide blade is rotated by the main shaft of the deposition device to ensure the thickness and uniformity of the deposited coating at the edge plate position of the multi-link guide blade; the parameters of the ceramic coating deposition are: the power supply of the electron beam gun is 18KV~20KV, the current of the heating gun is 0.2A~0.3A, the current of the evaporation gun is 1.2A~1.8A, and the rotation speed of the multi-link guide blade is 20r / min~40r / min.

[0056] In this embodiment, step (2) preferably includes the following specific steps:

[0057] (2-1) sandblasting the blade surface of the multi-joint guide blade with the coating deposited at the edge plate position to remove the ceramic coating with low bonding strength at the blade position;

[0058] (2-2) Installation of blade coating tooling: The multi-jointed guide blades on which the coating is deposited at the edge plate position are installed between the second large mounting plate protective shell 2 and the second small mounting plate protective shell 1. The profile and positioning blocks ensure that the non-coated area of ​​the blades is completely protected within the mounting plate protective shells. The second large mounting plate protective shell 2 and the second small mounting plate protective shell 1 are bundled and fixed with nickel-chromium wire. The second connecting rod 3 is then inserted into the inner hole of the main shaft of the deposition device and fixed with a pin, thereby connecting to the main shaft of the electron beam physical vapor deposition equipment to complete the installation of the tooling;

[0059] (2-3) Deposition of ceramic coating at the blade body position of the multi-joint guide blade: preheat the multi-joint guide blade with the coating deposited at the edge plate position to 900°C~950°C by an electron beam heating gun, turn on the electron beam evaporation gun, evaporate the ceramic target material into a gaseous target material, and the formed gas cloud wraps the multi-joint guide blade with the coating deposited at the edge plate position. The gaseous target material nucleates and grows into a columnar crystal ceramic coating at the blade body position of the multi-joint guide blade with the coating deposited at the edge plate position. Under the protection of the blade body coating tooling, the main shaft rotates to ensure the thickness and uniformity of the coating deposited at the blade body position of the multi-joint guide blade with the coating deposited at the edge plate position; parameters for ceramic coating deposition: the power supply of the electron beam gun is 18KV~20KV, the current of the heating gun is 0.2A~0.3A, the current of the evaporation gun is 1.2A~1.8A, and the rotation speed is 20r / min~40r / min.

[0060] Specifically, this embodiment is carried out on a guide blade, and the coating is prepared by the novel tooling and two-step process of the present invention, and the appearance, microstructure and bonding strength of the coating at the edge plate position are compared with the traditional method (the traditional method is to only use the blade body coating tooling to coat the blade, without considering the bonding strength of the coating at the edge plate position, and only the appearance has the coating state, but the actual bonding strength is extremely low). Figure 4 As shown in the figure, the coating is evenly applied to the edge plate position of the new method of the present invention and the traditional method. The appearance of the new method is more dense and uniform, and the color is closer to the blade body. The microstructure of the edge plate coating is detected by dissecting the leaf. Figure 5 As shown in the figure, it can be found that the ceramic coating prepared by the novel method of the present invention has a columnar crystal structure, while the ceramic layer prepared by the traditional method has no obvious columnar crystal structure, which does not meet the design requirements. The bonding strength of this type of organization is very low. Further comparison of the coating bonding strength at the edge plate position was carried out by sandblasting. The sandblasting pressure was 0.4MPa. The sandblasting results are shown in the figure. Figure 6 As shown in the figure, the ceramic coating of the edge plate coating prepared by the traditional method completely fell off after sandblasting, while the ceramic coating of the edge plate coating prepared by the novel method of the present invention can still retain more than 70% after sandblasting, which fully demonstrates that the novel method improves the bonding strength of the edge plate coating and the effect is obvious.

[0061] In summary, the present invention uses the edge plate coating tooling and the blade body coating tooling and the two-step process to enable the edge plate position of the guide blade to have a large angle with the steam flow direction, which can ensure that the edge plate position of the blade faces the ceramic target to receive steam particles, that is, to ensure that the blade edge plate is consistent with the blade body state during the PVD coating process, thereby forming a vertical columnar crystal structure, thereby improving the bonding strength.

[0062] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A tool for preparing a coating of a multi-link guide blade, characterized in that: Including edge plate coating tooling and blade coating tooling; The edge plate coating tooling comprises a first connecting rod (7), a side connecting frame (6) and a first mounting plate protective shell, wherein the first mounting plate protective shell is connected to the first connecting rod (7) via the side connecting frame (6), and the first connecting rod (7) is parallel to the first mounting plate protective shell; The blade coating tooling comprises a second connecting rod (3) and a second mounting plate protective shell, wherein the second mounting plate protective shell is vertically connected to the second connecting rod (3).

2. According to claim 1, a tool for preparing a coating of a multi-link guide blade, characterized in that: The first mounting plate protective shell comprises a first large mounting plate protective shell (5) and a first small mounting plate protective shell (4) used in conjunction with the first large mounting plate protective shell (5); the first large mounting plate protective shell (5) is connected to the first connecting rod (7) via the side connecting frame (6); the first connecting rod (7) is parallel to the first small mounting plate protective shell (4).

3. The tooling for preparing a coating of a multiple guide blade according to claim 2, characterized in that: The first connecting rod (7) is connected to the side connecting frame (6) by welding; the side connecting frame (6) is connected to the first small mounting plate protective shell (4) by welding; the first connecting rod (7) is connected to the main shaft of the equipment by mortise and tenon joint; the first small mounting plate protective shell (4) is provided with a profile matching the shape of the multi-jointed guide blades and a first positioning boss, and the first large mounting plate protective shell (5) is provided with a profile matching the shape of the multi-jointed guide blades and a second positioning boss.

4. The tooling for preparing a coating of a multiple guide blade according to claim 3, characterized in that: The second mounting plate protective shell comprises a second large mounting plate protective shell (2) and a second small mounting plate protective shell (1) used in conjunction with the second large mounting plate protective shell (2), and the second large mounting plate protective shell (2) is vertically connected to the second connecting rod (3).

5. A tooling for preparing a coating of a multiple guide blade according to claim 4, characterized in that: The second connecting rod (3) is connected to the second large mounting plate protective shell (2) by welding; the second connecting rod (3) is connected to the main shaft of the equipment by mortise and tenon joint; the second small mounting plate protective shell (1) is provided with a profile matching the shape of the multi-jointed guide blades and a third positioning boss, and the second large mounting plate protective shell (2) is provided with a profile matching the shape of the multi-jointed guide blades and a fourth positioning boss.

6. A method for preparing a coating of a multi-jointed guide vane, characterized in that: The preparation tool for the multi-guide blade coating according to any one of claims 1 to 5, wherein the preparation method comprises the following steps: (1) using an edge plate coating tool to deposit a ceramic coating at an edge plate position of a multi-joint guide blade to be processed, thereby obtaining a multi-joint guide blade with a coating deposited at the edge plate position; (2) The blade surface of the multi-joint guide blade deposited at the edge plate position is sandblasted to remove the coating with low bonding strength at the blade position, and then a blade coating tool is used to deposit a ceramic coating at the blade position of the multi-joint guide blade where the coating is deposited at the edge plate position, thereby forming a ceramic coating deposition at the edge plate position and the blade position of the multi-joint guide blade.

7. A method for preparing a coating of a multiple guide vane according to claim 6, characterized in that: The ceramic coating deposition in step (1) and step (2) adopts electron beam physical vapor deposition.

8. The method for preparing a coating of a multiple guide vane according to claim 6, characterized in that: The ceramic coating is a coating of at least one of zirconium oxide and rare earth zirconate; the number of layers of the ceramic coating is single layer, double layer or multi-layer.

9. A method for preparing a coating of a multiple guide vane according to any one of claims 6 to 8, characterized in that: Step (1) includes the following specific steps: (1-1) Installation of edge plate coating tooling: installing the multi-jointed guide blades to be processed between the first large mounting plate protective shell (5) and the first small mounting plate protective shell (4), fixing the first large mounting plate protective shell (5) and the first small mounting plate, and then inserting the first connecting rod (7) into the inner hole of the main shaft of the deposition device to complete the installation of the tooling; (1-2) Deposition of ceramic coating at the edge plate position of the multi-joint guide blades: preheat the multi-joint guide blades to be treated to 900°C~950°C by an electron beam heating gun, turn on the electron beam evaporation gun, evaporate the ceramic target material into a gaseous target material, the formed gaseous target material wraps the multi-joint guide blades to be treated, and the gaseous target material nucleates and grows at the edge plate position of the multi-joint guide blades to form a columnar crystal ceramic coating. The multi-joint guide blades are protected by the edge plate coating tooling and rotated by the main shaft of the deposition device to ensure the thickness and uniformity of the deposited coating at the edge plate position of the multi-joint guide blades; parameters for ceramic coating deposition: the power supply of the electron beam gun is 18KV~20KV, the current of the heating gun is 0.2A~0.3A, the current of the evaporation gun is 1.2A~1.8A, and the rotation speed of the multi-joint guide blades is 20r / min~40r / min.

10. A method for preparing a coating of a multiple guide vane according to claim 9, characterized in that: Step (2) includes the following specific steps: (2-1) sandblasting the blade surface of the multi-joint guide blade with the coating deposited at the edge plate position to remove the ceramic coating with low bonding strength at the blade position; (2-2) Installation of blade body coating tooling: installing the multi-jointed guide blades for coating deposition at the edge plate position between the second large mounting plate protection shell (2) and the second small mounting plate protection shell (1), fixing the second large mounting plate protection shell (2) and the second small mounting plate protection shell (1), and then inserting the second connecting rod (3) into the inner hole of the main shaft of the deposition device to complete the installation of the tooling; (2-3) Deposition of ceramic coating at the blade body position of the multi-joint guide blades: preheat the multi-joint guide blades with the coating deposited at the edge plate position to 900°C~950°C by an electron beam heating gun, turn on the electron beam evaporation gun, evaporate the ceramic target material into a gaseous target material, and the formed gaseous target material wraps the multi-joint guide blades with the coating deposited at the edge plate position. The gaseous target material nucleates and grows into a columnar crystal ceramic coating at the blade body position of the multi-joint guide blades with the coating deposited at the edge plate position. Under the protection of the blade body coating tooling, the main shaft is rotated to ensure the thickness and uniformity of the coating deposited at the blade body position of the multi-joint guide blades with the coating deposited at the edge plate position; parameters for ceramic coating deposition: the power supply of the electron beam gun is 18KV~20KV, the current of the heating gun is 0.2A~0.3A, the current of the evaporation gun is 1.2A~1.8A, and the rotation speed is 20r / min~40r / min.

Images