Ventilation tool for thermal spraying of film hole test piece

Abstract

The utility model belongs to the technical field of thermal spraying auxiliary tools, and particularly discloses a ventilation tool for thermal spraying of a film hole test piece, which comprises a base, a boss is arranged on one side of the base, and a clamping plate for fixing the film hole test piece is detachably connected to the other side opposite to the boss. A plurality of hole-shaped structures penetrating through the base and the boss are distributed on the base in the length direction of the boss, the multiple hole-shaped structures are located on one side of the boss and connected with the gas outlet end of the gas control assembly, and the gas inlet end of the gas control assembly is directly connected with a gas source or connected with the gas source through a gas meter adapter. According to the ventilation tool provided by the utility model, the deposition condition of a spraying material at the periphery of a gas film hole of a test piece can be effectively controlled by introducing gas with controllable flow, so that the preparation of a coating of the test piece without blocking objects and blocking the gas film hole is further realized, and the ventilation tool is particularly suitable for preparing a ceramic coating of the gas film hole test piece; the method has the advantages of simplicity and convenience in operation, controllable airflow, excellent coating quality and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of thermal spraying auxiliary tools, and particularly relates to a ventilation tooling for thermal spraying of a gas film hole test piece. Background Technique

[0002] The thermal spraying process is one of the most successful industrial coating preparation means at present. Its principle is to use a heat source to quickly heat the spraying material (including rod-shaped, wire-shaped, powder, liquid and other materials) to a molten or semi-molten state, and then under the action of a high-speed gas or flame flow, the spraying material is atomized and accelerated to be sprayed onto the surface of a workpiece that has been pre-treated. In this process, the molten or semi-molten material forms a coating through steps such as heating - melting - flattening and spreading - deposition and solidification - stacking. This coating preparation process has the advantages of high efficiency, controllable coating material components, and controllable coating uniformity, and has been widely used in the fields of aviation, aerospace, etc.

[0003] However, for aeroengine hot-end components and their typical test pieces with a high ambient temperature in the application working condition and requiring heat dissipation through gas film holes, the thermal spraying material in a molten or semi-molten state is extremely likely to block the gas film holes of the parts, resulting in the failure of the gas film holes or the internal turbulator columns of the parts. Even if the protection method of plugging - spraying the coating - pulling out the plug is adopted, there is still a situation where the coating around the gas film hole is damaged when pulling out the plug, resulting in a poor appearance of the coating around the gas film hole and easy problems such as stress concentration at the edge of the gas film hole. In addition, due to the unfixed size (generally 0.7mm - 1.2mm), inconsistent angles (18° - 30°), diverse forms (circular, elliptical, irregular), and irregular arrangement and distribution of the gas film holes, a single plugging method is difficult to meet the application requirements of its working conditions.

[0004] In view of this, the inventor of the present invention provides a ventilation tooling for thermal spraying of a gas film hole test piece to solve the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to overcome the above-mentioned disadvantages of the prior art, and provides a ventilation tooling for thermal spraying of a gas film hole test piece. By using this ventilation tooling, it can effectively avoid the spraying material from blocking the gas film holes of the test piece, and the coating state around the gas film holes after thermal spraying is good, which is beneficial to the coating preparation of the gas film hole test piece, creates favorable conditions for the smooth progress of the bonding strength and thermal shock performance characterization work of the gas film hole test piece, and brings great convenience.

[0006] The purpose of the utility model is solved by the following technical solutions:

[0007] An air - venting tooling for thermal spraying of a test piece with air film holes provided by the utility model includes a base. One side of the base is provided with a boss, and on the other side of the base opposite to the boss, a clamping plate is detachably connected for fixing the test piece with air film holes. A number of sets of hole - shaped structures penetrating the entire base and the boss are arranged along the length direction of the boss on the base, and the multiple sets of hole - shaped structures are connected to the air outlet end of the gas control assembly on one side of the boss. The air inlet end of the gas control assembly is directly connected to the gas source or connected to the gas source through a gas meter adapter.

[0008] Further, each set of the hole - shaped structures includes a threaded hole and a stepped hole that are coaxially and communicatively arranged. The axes of the threaded hole and the stepped hole are perpendicular to the horizontal plane of the base. The threaded hole is arranged near the boss side and is connected to the gas control assembly. The small end of the stepped hole is communicated with the threaded hole, and the large end of the stepped hole is arranged on the side far from the boss.

[0009] Further, the gas control assembly includes a gas guide pipe. A flowmeter - pressure reducer is assembled at the air inlet end of the gas guide pipe. The air outlet end of the gas guide pipe is provided with a number of branches equal to the number of hole - shaped structures, and a threaded gas pipe quick - connector screwed to the threaded hole is installed at the end of each branch.

[0010] Further, the gas control assembly further includes an O - ring seal. The O - ring seal is arranged on the threaded gas pipe quick - connector for sealing the threaded hole and the threaded gas pipe quick - connector.

[0011] Further, the flowmeter - pressure reducer is mainly formed by connecting a dual - gauge pressure reducer and a gas flowmeter. The gas flow of the gas flowmeter is 1L / Min - 50L / Min, the input air pressure is 0.1MPa - 25MPa, and the output air pressure is 0.05MPa - 0.5MPa;

[0012] The input end of the flowmeter - pressure reducer is the outer convex port of the dual - gauge pressure reducer and the internal thread arranged on the circumferential direction of the outer convex port for connecting to the gas source or the gas meter adapter; the output end is a pagoda interface for connecting to the air inlet end of the gas guide pipe.

[0013] Further, the gas meter adapter has a hollow structure. One end is provided with an inner concave port adapted to the outer convex port and an external thread screwed to the internal thread. The other end is provided with a cylindrical hollow boss, and a hexagonal nut is arranged between the external thread and the cylindrical hollow boss.

[0014] Further, the base has a cuboid structure. The boss is centrally arranged on the upper surface of the base. A number of first through - holes are evenly arranged on the base in a circle around the boss.

[0015] Correspondingly, second through holes that match the number and position of the first through holes one by one are formed in the card board, and the base and the card board are detachably connected by fasteners passing through the first through holes and the second through holes.

[0016] Furthermore, the card board has a cuboid structure, and third through holes that correspond to the number and position of the hole-shaped structures one by one are formed along its length direction. The third through holes are used to cooperate with the card board, the fasteners, and the base to fix the test piece with air film holes.

[0017] Furthermore, an expansion joint that divides the card board into two parts is formed along the length direction of the card board, and the expansion joint penetrates through all the third through holes. The width of the expansion joint is 1 mm to 3 mm.

[0018] Both the first through hole and the second through hole are waist-shaped holes.

[0019] The third through hole is a circular hole or a square hole.

[0020] Furthermore, the air source comes from a compressed air machine or a compressed gas cylinder.

[0021] Wherein, when the air source comes from a compressed air machine, the air inlet end of the gas control assembly is connected to the compressed air machine through a gas meter adapter; when the air source comes from a compressed gas cylinder, the air inlet end of the gas control assembly is directly connected to the compressed gas cylinder.

[0022] Compared with the prior art, the utility model has the following beneficial effects:

[0023] 1. The ventilation tooling provided by the utility model is mainly for test pieces with air film holes during the thermal spraying process. The ventilation tooling mainly consists of a base, a card board, a gas control assembly, an air source, etc. During thermal spraying, first, a circular or square test piece with air film holes is placed on the ventilation tooling, and the corresponding air source is connected; then, according to the specific sizes of the air film holes and the test piece, the gas flow rate is adjusted to an appropriate degree by means of the ventilation tooling, so that the gas flows through the air film holes on the back of the test piece and sprays out from the air film holes on the front of the test piece. With such a setting, it can effectively prevent the spraying material from depositing in the air film holes of the test piece, thereby meeting the preparation requirements of thermal spraying coatings for test pieces with air film holes of different sizes. Compared with the spraying method of plugging the air film holes with plugs in the prior art, the ventilation tooling can effectively solve the plugging problems caused by different sizes of air film holes, and at the same time avoid the damage to the coating around the air film holes when pulling out the plugs, preventing problems such as poor appearance of the coating around the air film holes.

[0024] 2. The ventilation tooling provided by the present utility model is equipped with a flowmeter pressure reducer, enabling controllability of gas flow. During use, it can either adopt a compressed air machine as the gas source through a gas meter adapter, or directly connect the ventilation tooling to a compressed gas cylinder and use the compressed gas cylinder as the gas source. This setting expands the gas source channels.

[0025] 3. In the ventilation tooling provided by the present utility model, the clamping plate is connected to the base through multiple groups of waist-shaped holes and fasteners, and an expansion joint that divides it into two parts is reserved on the clamping plate. With this setting, while fixing the test piece, the waist-shaped holes and the expansion joint can effectively avoid the heat deformation of the ventilation tooling caused during the thermal spraying process, thereby preventing damage to the test piece. In addition, the stepped holes on the base of the ventilation tooling can be used to prepare coatings for circular air film hole test pieces for combined strength testing and square air film hole test pieces for thermal shock testing, fully meeting the requirements of coating preparation and subsequent testing. Description of the Drawings

[0026] The drawings here are incorporated into the specification and form a part of this specification, and are used together with the specification to explain the principles of the present utility model.

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0028] Figure 1 It is a schematic structural diagram of the overall ventilation tooling (including the gas meter adapter) of the present utility model;

[0029] Figure 2 It is a schematic structural diagram of the gas control component in the ventilation tooling of the present utility model;

[0030] Figure 3 It is a schematic structural diagram of the overall ventilation tooling in Embodiment 1 of the present utility model;

[0031] Figure 4 It is a schematic structural diagram of the base and the boss in Embodiment 1 of the present utility model;

[0032] Figure 5 It is a schematic structural diagram of the other side of the base in Embodiment 1 of the present utility model;

[0033] Figure 6 It is a schematic structural diagram of the clamping plate (circular hole) in Embodiment 1 of the present utility model;

[0034] Figure 7 It is a schematic structural diagram of the gas meter adapter in Embodiment 1 of the present utility model;

[0035] Figure 8 It is a schematic diagram of the overall structure of the ventilation tooling in Embodiment 2 of the present utility model;

[0036] Figure 9 It is a schematic diagram of the structure of the clamping plate (square hole) in Embodiment 2 of the present utility model;

[0037] Wherein:

[0038] 1 is the base; 11 is the hole structure; 12 is the first through hole; 111 is the threaded hole; 112 is the stepped hole;

[0039] 2 is the clamping plate; 21 is the second through hole; 22 is the third through hole; 23 is the expansion joint;

[0040] 3 is the gas control assembly; 31 is the air duct; 32 is the flowmeter pressure reducer; 33 is the threaded air pipe quick connector; 34 is the O-ring; 321 is the convex mouth; 322 is the internal thread; 323 is the conical interface;

[0041] 4 is the gas meter adapter; 41 is the concave mouth; 42 is the external thread; 43 is the cylindrical hollow convex platform; 44 is the hexagon nut. Detailed implementation manners

[0042] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present utility model. On the contrary, they are only examples of devices consistent with some aspects of the present utility model detailed in the appended claims.

[0043] In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the present utility model will be further described in detail below with reference to the drawings and embodiments.

[0044] Embodiment 1 (the test piece is a circular air film hole)

[0045] Please refer to Figures 1 to 7, an air vent tool for thermal spraying of a test piece with air film holes provided by an embodiment of the present utility model is mainly aimed at a test piece with circular air film holes, and includes a base 1, a clamping plate 2, a gas control component 3, a gas meter adapter 4 and a gas source. Among them, a boss is provided on one side of the base 1, and a clamping plate 2 for fixing the test piece with air film holes is detachably connected to the other side of the base 1 opposite to the boss; a plurality of sets of hole-shaped structures 11 penetrating through the entire base 1 and the boss are arranged along the length direction of the boss on the base 1, and a plurality of sets of hole-shaped structures 11 are connected to the air outlet end of the gas control component 3 on one side of the boss, and the air inlet end of the gas control component 3 is connected to the gas source through the gas meter adapter 4, and the gas source comes from a compressed air machine. Through the above settings, it can be seen that when thermal spraying a test piece with air film holes, it is only necessary to fix it between the clamping plate 2 and the base 1 and connect the gas source; then, according to the specifications of the test piece and the air film holes, adjust the gas flow to an appropriate level through the gas control component 3, which can prevent the molten or semi-molten spraying material from depositing in the air film holes of the test piece during thermal spraying, ensuring the quality of the test piece after thermal spraying.

[0046] As Figure 4 , 5 shown, the base 1 of the present utility model presents a cuboid structure. A boss is provided at the exact middle position of the upper surface of the cuboid base. This boss is also a cuboid structure. Figuratively speaking, it is like a small cuboid stacked on a large cuboid. Preferably, the two are of an integrally formed structure. A plurality of sets of through hole-shaped structures 11 are provided on the boss and the base 1. As shown in the drawings of this embodiment, a total of six sets are provided. Each set of hole-shaped structures 11 includes a threaded hole 111 and a stepped hole 112 that are coaxially and communicatively arranged. Among them, the axes of the threaded hole 111 and the stepped hole 112 are perpendicular to the horizontal plane (or the upper surface) of the base 1. The threaded hole 111 is arranged near the boss side and can be quickly connected to the gas control component 3, and a chamfer is provided on the outer edge of the threaded hole 111. The stepped hole 112 can be used to accommodate the test piece. Its small end is communicatively connected to the threaded hole 111. The large end of the stepped hole 112 is arranged on the side away from the boss, and corresponding chamfers are provided at the edges of the small end and the large end respectively.

[0047] Specifically, in the embodiment of the present utility model, the height of the top surface of the boss from the upper surface of the base 1 is 25 mm, the distance between the long side edge of the boss and the long side edge of the base 1 is 30 mm, and the distance between the short side and the short side edge of the base 1 is 15 mm. The diameter of the threaded hole 111 is 9.7 mm, which is adapted to the PT1 / 8 joint thread, and the chamfer is C1. It should be particularly noted that in this embodiment, the stepped hole 112 is designed as a circular stepped hole in order to adapt to the test piece with circular air film holes. Among them, the diameter of the small end is 18 mm, the depth is 3 mm, and the chamfer is C1; the diameter of the large end is 22 mm, the depth is 20 mm, and the chamfer is C2.

[0048] In order to achieve the goal of detachable connection between the clamping plate 2 and the base 1, in this embodiment, a plurality of first through holes 12 are evenly arranged in a circle around the convex platform on the base 1. Correspondingly, second through holes 21 that match the number and position of the first through holes 12 one by one are provided on the clamping plate 2. The specific specifications and number of the through holes can be set according to the actual situation. Finally, the base 1 and the clamping plate 2 are detachably connected by means of fasteners (bolt assemblies) passing through the first through holes 12 and the second through holes 21. In this way, when operating on small-batch spraying test pieces, disassembly and replacement can be carried out conveniently.

[0049] As Figure 6 shown, the clamping plate 2 in the embodiment of the present utility model is of a cuboid structure. The clamping plate 2 is provided with third through holes 22 that correspond to the hole structure 11 in number and position along the length direction, that is, six circular holes are arranged at equal intervals. The radius of the circular hole is 12.7 mm, and the distance between adjacent circular holes is 20 mm. For example, if the size of the test piece is large, it may be necessary to appropriately increase the radius of the circular hole and the distance between adjacent circular holes to ensure that the test piece can be smoothly installed and preheated for spraying operations; conversely, if the size of the test piece is small, these parameters can be appropriately reduced.

[0050] In addition, it should be particularly noted that since the working condition of the ventilation tooling of the present utility model is a high-temperature thermal spraying environment, in order to avoid the risk of the tooling being deformed by heat and possibly damaging the test piece. The embodiment of the present utility model takes the following two measures: one is that an expansion joint 23 that divides it into two parts is provided along the length direction on the clamping plate 2, and the expansion joint 23 penetrates through all the third through holes 22 (i.e., circular holes), and the width of the expansion joint 23 is 1 mm to 3 mm; the other is that the first through holes 12 and the second through holes 21 connecting the clamping plate 2 and the base 1 are both set as the same waist-shaped holes for convenient alignment connection. In this embodiment, the radius of the waist-shaped hole is 3 mm, and the length of the long axis is 13 mm. Through the above settings, in actual thermal spraying operations, when the temperature rises sharply, the expansion joint 23 can provide a certain expansion space for the clamping plate 2, effectively preventing the clamping plate 2 from being deformed due to excessive heat; and the design of the waist-shaped hole enables the clamping plate 2 and the base 1 to have a certain adjustment margin during connection, and even in the case of slight deformation due to heat, accurate alignment connection between the two can be ensured.

[0051] As Figure 2As shown, the gas control assembly 3 of the utility model comprises an air guide tube 31, the air inlet end of the air guide tube 31 is equipped with a flow meter pressure reducer 32, the air outlet end of the air guide tube 31 is provided with a number of branches having the same number as the hole structure 11 (each branch can be connected to the main pipeline through a two-way or three-way connection, which is the prior art and will not be described in detail), and the end of each branch is installed with a threaded air pipe quick connector 33 threadedly connected to the threaded hole 111. Among them, the inner diameter of the air guide tube 31 is 8 mm and the outer diameter is 10 mm. The flowmeter pressure reducer 32 is used to control the flow of gas. It is mainly composed of a double-meter pressure reducing valve connected to a gas flowmeter. The gas flow rate of the gas flowmeter is 1L / Min~50L / Min, the input gas pressure is 0.1MPa~25MPa, and the output gas pressure is 0.05MPa~0.5MPa. The input end of the flowmeter pressure reducer 32 is an outer convex port 321 of the double-meter pressure reducing valve and an inner thread 322 arranged on the circumference of the outer convex port 321, which is used to directly connect to the gas source (for example, the concave port of the compressed gas cylinder) or connect to the gas source through the gas meter adapter 4; the output end is a pagoda interface 323, which is used to connect to the air inlet end of the air guide tube 31. One end of the threaded air pipe quick connector 33 is provided with a PT1 / 8 thread, and the other end is provided with an air pipe connector, and the connector size is 10mm. Through the above settings, in actual applications, if it is necessary to accurately control the gas flow, it can be achieved by adjusting the flow meter pressure reducer 32. When using gas sources of different specifications, the external protrusion 321 and the circumferential internal thread 322 can be conveniently connected to them accordingly; and the threaded air pipe quick connector 33 can ensure a quick and stable connection with the threaded hole 111 on one side of the boss.

[0052] Furthermore, in the embodiment of the utility model, the gas control assembly 3 further includes an O-ring 34, which is disposed on the threaded air pipe quick connector 33 and is used to seal the threaded hole 111 and the threaded air pipe quick connector 33. During the gas transmission process, the O-ring 34 can effectively prevent gas leakage from the connection between the threaded hole 111 and the threaded air pipe quick connector 33, thereby ensuring the sealing and working stability of the gas control assembly 3. Without the sealing effect of the O-ring 34, gas leakage may occur, affecting the normal operation of the entire ventilation work.

[0053] like Figure 7 As described, in the embodiment of the utility model, the gas meter adapter 4 is a hollow structure, one end is provided with an inner recess 41 adapted to the outer protrusion 321 and an outer thread 42 screwed to the inner thread 322, the other end is provided with a cylindrical hollow boss 43, and a hexagonal nut 44 is arranged between the outer thread 42 and the cylindrical hollow boss 43.

[0054] It should be noted that the various dimensional parameters of the ventilation tooling provided by the present utility model can be specifically set according to the thermal spraying test piece, and the embodiments of the present utility model do not make specific limitations thereto. That is to say, the specific dimensions of the ventilation tooling are not fixed, but can be adjusted according to the specifications of the actually used thermal spraying test piece. For example, the size, depth, chamfer size of the stepped hole in the hole structure 11, and the shape and size of the third through hole 22 on the clamping plate 2, etc., can all be set according to the actual situation of the thermal spraying test piece to ensure that the ventilation tooling can be well matched with the test piece and meet specific test or processing requirements. This can improve the versatility and applicability of the ventilation tooling, enabling it to play a role in different thermal spraying tests or related operations.

[0055] The usage process of the thermal spraying ventilation tooling (using a compressed air machine as the air source) for a test piece with circular gas film holes provided by the embodiment of the present utility model is as follows:

[0056] 1) Fix the specimen: Place the circular test piece with gas film holes on the stepped hole 112 of the base 1, and clamp the specimen through the third through hole 22 (circular hole) on the clamping plate 2. Use fasteners to pass through the first through hole 12 and the second through hole 21 to fix the clamping plate 2 on the base 1. It should be noted that when fixing the specimen, it is necessary to ensure that the tightening degree of the fasteners is appropriate when the clamping plate 2 is connected to the convex base 1, so as to ensure the stability of the specimen and prevent the specimen from being damaged.

[0057] 2) Construct the gas path: First, install threaded air pipe quick connectors 33 on each branch of the air guide pipe 31, and install a flowmeter pressure reducer 32 at the air inlet end of the air guide pipe 31; then sleeve the O-ring 34 on the bottom end of the thread of the threaded air pipe quick connector 33, and then screw the threaded air pipe quick connector 33 onto the threaded hole 111 on the convex platform of the base 1. During the process of constructing the gas path, pay attention to the tightness of the connection of each joint to prevent air leakage, and at the same time ensure the reasonable layout of the air guide pipe 31 so as not to affect the subsequent operation process. For example, if there is an air leakage point in the gas path, it will cause insufficient gas pressure and affect the quality of thermal spraying; an unreasonable layout of the air guide pipe may hinder the operation of the operator and reduce work efficiency.

[0058] 3) Connect the gas source (compressed air machine): Connect the convex port 321 and internal thread 322 at the input end of the flowmeter pressure reducer 32 to the concave port 41 and external thread 42 at one end of the gas meter adapter 4 respectively. Connect the cylindrical hollow boss 43 at the other end of the gas meter adapter 4 to the compressed air machine, and lock it tightly by rotating the hexagonal nut 44 with a wrench tool, thus completing the combination of the ventilation tooling. If the gas source is a compressed gas cylinder, the gas meter adapter 4 is not required, and it can be directly connected to the compressed gas cylinder through the interface at the input end of the flowmeter pressure reducer 32. When connecting the gas source, carefully check the matching and sealing performance of each interface to ensure that the gas source can supply gas stably and safely. After verification, then carry out the thermal spraying operation.

[0059] Example 2 (The test piece is a square film hole)

[0060] A ventilation tooling for thermal spraying of a test piece with film holes provided by an embodiment of the present utility model is mainly for a test piece with square film holes. The ventilation tooling in this embodiment (as Figure 8 shown) is different from that in Example 1 mainly in the following two aspects:

[0061] One is that the stepped hole 112 in the hole type structure 11 in this embodiment corresponds to a square stepped hole (not shown in the figure) that matches the square film hole test piece. Specifically, the side length of the small end of the square stepped hole is 18 mm, the depth is 3 mm, and the chamfer is C1; the side length of the large end is 25 mm, the depth is 20 mm, and the chamfer is C2.

[0062] The second is that the third through hole 22 in the clamping plate 2 in this embodiment is a square hole, as Figure 9 shown, with a side length of 30 mm. Circular grooves with a radius of 1 mm are provided at the four corners of the edge of the square hole to reduce stress concentration and improve the service life of the clamping plate 2.

[0063] Similarly, the above dimensions in this embodiment can be set according to the actual situation of the specimen to be processed. For example, if the size of the specimen to be processed is large, then the sizes of the square stepped hole and the square hole also need to be increased accordingly to ensure that the specimen can be properly installed.

[0064] The usage process of the thermal spraying ventilation tooling provided by the embodiment of the present utility model for a test piece with square film holes (using a compressed gas cylinder as the gas source) is as follows:

[0065] 1) Fix the specimen: Place the circular test piece of the air film hole on the stepped hole 112 of the base 1. Clamp the specimen through the third through hole 22 (square hole) on the clamping plate 2. Use fasteners to pass through the first through hole 12 and the second through hole 21 to fix the clamping plate 2 on the base 1. It should be noted that when fixing the specimen, it is necessary to ensure that the tightening degree of the fasteners is appropriate when the clamping plate 2 is connected to the convex base 1, so as to ensure the stability of the specimen and prevent the specimen from being damaged.

[0066] 2) Construct the air path: First, install threaded air pipe quick connectors 33 on each branch of the air guide pipe 31, and install a flow meter pressure reducer 32 at the air inlet end of the air guide pipe 31. Then, sleeved the O-ring 34 on the bottom end of the thread of the threaded air pipe quick connector 33, and then thread the threaded air pipe quick connector 33 with the threaded hole 111 on the convex platform of the base 1. During the construction of the air path, pay attention to the tightness of the connection of each joint to prevent air leakage. At the same time, ensure that the layout of the air guide pipe 31 is reasonable and does not affect the subsequent operation process. For example, if there is an air leakage point in the air path, it will cause insufficient gas pressure and affect the quality of thermal spraying; an unreasonable layout of the air guide pipe may hinder the operation of the operator and reduce work efficiency.

[0067] 3) Connect the gas source (compressed gas cylinder): Directly connect the outer convex port 321 and the internal thread 322 at the input end of the flow meter pressure reducer 32 with the output port of the compressed gas cylinder to complete the combination of the ventilation tooling; if the gas source is a compressed air machine, the input end of the flow meter pressure reducer 32 needs to be connected to the compressed air machine with the help of a gas meter adapter 4. When connecting the gas source, carefully check the matching and sealing performance of each interface to ensure that the gas source can supply gas stably and safely. After verification, then carry out the thermal spraying operation.

[0068] The above are only the specific implementation manners of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention.

[0069] It should be understood that the present invention is not limited to the above-described content and can be modified and changed without departing from its scope. The scope of the present invention is only limited by the appended claims.

Claims

1. A ventilation tool for thermal spraying of air film hole test pieces, characterized in that: The invention comprises a base (1), one side of the base (1) is provided with a boss, and the other side of the base (1) opposite to the boss is detachably connected with a clamping plate (2) for fixing a test piece having an air film hole, and the base (1) is provided with a plurality of sets of hole structures (11) penetrating the entire base (1) and the boss along the length direction of the boss, and a plurality of sets of the hole structures (11) are located on one side of the boss and connected to the gas outlet end of the gas control component (3), and the gas inlet end of the gas control component (3) is directly connected to the gas source or connected to the gas source through a gas meter adapter (4).

2. The ventilation tool for thermal spraying of air film hole test pieces according to claim 1, characterized in that: Each set of the hole-shaped structures (11) comprises a threaded hole (111) and a step hole (112) which are coaxially and connected to each other, the axes of the threaded hole (111) and the step hole (112) being perpendicular to the horizontal plane of the base (1), the threaded hole (111) being arranged close to one side of the boss and connected to the gas control component (3), the small end of the step hole (112) being connected to the threaded hole (111), and the large end of the step hole (112) being arranged away from one side of the boss.

3. The ventilation tool for thermal spraying of air film hole test pieces according to claim 2, characterized in that: The gas control assembly (3) comprises an air guide pipe (31), the air inlet end of the air guide pipe (31) is equipped with a flow meter pressure reducer (32), the air outlet end of the air guide pipe (31) is provided with a number of branches having the same number as the hole structure (11), and the end of each branch is equipped with a threaded air pipe quick connector (33) threadedly connected to the threaded hole (111).

4. The ventilation tool for thermal spraying of air film hole test pieces according to claim 3, characterized in that: The gas control assembly (3) further comprises an O-type sealing ring (34), wherein the O-type sealing ring (34) is arranged on the threaded gas pipe quick connector (33) and is used for sealing the threaded hole (111) and the threaded gas pipe quick connector (33).

5. The ventilation tool for thermal spraying of air film hole test pieces according to claim 3, characterized in that: The flow meter pressure reducer (32) is mainly composed of a double-meter pressure reducing valve connected to a gas flow meter, the gas flow rate of the gas flow meter is 1L / Min-50L / Min, the input gas pressure is 0.1MPa-25MPa, and the output gas pressure is 0.05MPa-0.5MPa; The input end of the flow meter pressure reducer (32) is an outer convex opening (321) of a double-meter pressure reducing valve and an inner thread (322) arranged in the circumferential direction of the outer convex opening (321), which is used to be connected to a gas source or a gas meter adapter (4); the output end is a pagoda interface (323), which is used to be connected to the air inlet end of the air guide pipe (31).

6. The ventilation tool for thermal spraying of air film hole test pieces according to claim 5, characterized in that: The gas meter adapter (4) is a hollow structure, one end of which is provided with an inner recess (41) adapted to the outer protrusion (321) and an outer thread (42) threadedly connected to the inner thread (322), and the other end of which is provided with a cylindrical hollow boss (43), and a hexagonal nut (44) is arranged between the outer thread (42) and the cylindrical hollow boss (43).

7. The ventilation tool for thermal spraying of air film hole test pieces according to claim 1, characterized in that: The base (1) is of a rectangular parallelepiped structure, the boss is centrally arranged on the upper surface of the base (1), and a plurality of first through holes (12) are evenly distributed in a circle around the boss on the base (1); Correspondingly, the card plate (2) is provided with second through holes (21) whose number and positions match those of the first through holes (12), and a fastener is passed through the first through holes (12) and the second through holes (21) to realize a detachable connection between the base (1) and the card plate (2).

8. The ventilation tool for thermal spraying of air film hole test pieces according to claim 7, characterized in that: The clamping plate (2) is a rectangular parallelepiped structure, and is provided with third through holes (22) along its length direction, the number and position of which correspond to the hole-shaped structure (11). The third through holes (22) are used to cooperate with the clamping plate (2), the fastener and the base (1) to fix the test piece with the air film hole.

9. The ventilation tool for thermal spraying of air film hole test pieces according to claim 8, characterized in that: The clamping plate (2) is provided with an expansion joint (23) along the length direction to divide it into two parts, and the expansion joint (23) runs through all the third through holes (22), and the width of the expansion joint (23) is 1 mm to 3 mm; The first through hole (12) and the second through hole (21) are both waist-shaped holes; The third through hole (22) is a circular hole or a square hole.

10. The ventilation tool for thermal spraying of an air film hole test piece according to any one of claims 1 to 9, characterized in that: The gas source comes from a compressed air machine or a compressed gas cylinder; When the gas source comes from a compressed air machine, the gas inlet end of the gas control component (3) is connected to the compressed air machine via a gas meter adapter (4); when the gas source comes from a compressed gas cylinder, the gas inlet end of the gas control component (3) is directly connected to the compressed gas cylinder.

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