Automatic detection device and method for surface coating of thrust chamber

Abstract

The invention discloses an automatic detection device and method for a surface coating of a thrust chamber, and the method comprises the steps: enabling a to-be-detected product to be fixed through a fixing tool, and installing the to-be-detected product on an equipment fixing platform, and enabling a to-be-detected surface to be horizontal; secondly, the product rotation speed is preset through the equipment control center, and the product is driven to rotate stably at a constant speed; thirdly, the equipment control center sends out an instruction to control an X-ray emitting and receiving device to move to the position above the conical surface to emit X-rays and collect information; then, the equipment control center carries out modeling calculation on the collected data; and finally, the equipment control center exports the coating thickness information of the whole molded surface of the measured product into a worksheet, so that the accurate, automatic and efficient measurement of the coating thickness on the surface of the thrust chamber can be completed. According to the technology, a specific tool is adopted to fix the measured workpiece, the stability of the measurement process is guaranteed, the measurement precision is improved, workpiece coating thickness information can be automatically obtained according to a software program, and the measurement requirements of the surface coating thickness of rocket engine thrust chambers of different models are met.

Description

Technical Field

[0001] The invention belongs to the technical field of coating thickness detection, and in particular relates to an automatic detection device and method for coating on the surface of a thrust chamber. Background Art

[0002] As an important part of surface engineering quality inspection, coating thickness measurement is a necessary means to ensure the quality of product coating. How to conveniently and accurately measure coating thickness has always been a key problem that needs to be solved in the field of electroplating production. As a typical method for non-destructive surface coating thickness detection, X-ray coating thickness measurement can realize various coating thickness detection on the surface of substrates such as steel, high-temperature alloys, and titanium alloys. It is widely used in metal processing, manufacturing, and scientific research. At present, there are two types of X-ray thickness gauges on the market: desktop X-ray thickness gauges and handheld X-ray thickness gauges. For complex surface workpieces, desktop X-ray thickness gauges need to constantly adjust the measurement angle and workpiece orientation when measuring different parts, and it is difficult to ensure the measurement angle. At the same time, the inspection room of desktop thickness gauges is generally small and cannot detect large-sized workpieces. The inspection window of handheld X-ray thickness gauges is large, and a flat surface of a certain size is required for effective inspection, and the inspection accuracy is slightly low, especially the inspection accuracy of arc surfaces is lower.

[0003] During the manufacturing process of the thrust chamber of a rocket engine, the inner wall of the thrust chamber is coated with a coating. The inner wall of the thrust chamber is in the shape of a cone, and the maximum diameter is greater than φ500mm, which cannot be placed in the inspection room of a desktop X-ray thickness gauge. At the same time, since the inner wall surface is processed with ribs and grooves, there is no continuous flat surface, and the surface is an arc surface, a handheld X-ray thickness gauge cannot measure it. The existing coating thickness gauge can no longer meet the coating detection requirements of this type of workpiece. Summary of the invention

[0004] The technical problem solved by this application is: to overcome the shortcomings of the prior art, to provide an automatic detection device and method for the surface coating of a thrust chamber, to use an automatic rotation device and control system to achieve automatic, accurate and efficient measurement of the coating on the outer surface of a large-sized conical workpiece, to meet the production needs of accurate detection and control of the coating on the inner wall of the thrust chamber of a rocket engine. The problem that "the maximum diameter of the inner wall of the thrust chamber of a rocket engine is greater than φ500mm, and the surface is processed with ribs and grooves, and there is no continuous flat surface, and the coating thickness gauge currently used cannot be directly detected" is solved.

[0005] The technical solutions provided by this application are as follows:

[0006] An automatic detection device for the surface coating of a thrust chamber comprises an X-ray emitting and receiving device, an automatic rotating device and an equipment fixing platform; the automatic rotating device is arranged on the equipment fixing platform, and is used for mounting a cone-shaped workpiece to be measured, and generally adjusts the angle between the axis of the workpiece to be measured and the equipment fixing platform, so that the generatrix at the top of the cone surface of the workpiece to be measured is kept horizontal, and drives the workpiece to be measured to rotate around its own axis; the X-ray emitting and receiving device is located above the workpiece to be measured, and is used for measuring the coating thickness of the cone surface of the workpiece to be measured rotating around its own axis.

[0007] The automatic rotation device includes a motor, a support frame, an adapter assembly, a rotating shaft and a fixed tool. The support frame is arranged on the surface of the fixed platform of the equipment, the rotating shaft is connected to the support frame, and the angle between the rotating shaft and the surface of the fixed platform of the equipment is adjusted by the support frame; the fixed tool is connected to the rotating shaft and is used to coaxially install the workpiece to be measured on the rotating shaft; the output shaft of the motor and the rotating shaft are connected by the adapter assembly, so that the motor drives the rotating shaft to rotate, and then drives the workpiece to be measured to rotate around its own axis.

[0008] The support frame includes a mounting plate, an upper support plate, a lower support plate and a fixed plate. Two mounting plates are provided in parallel with each other. The bottom end of the mounting plate is fixedly connected to the surface of the equipment fixing platform. The upper support plate and the lower support plate are parallel to each other. The upper support plate and the lower support plate are located between the two mounting plates. The fixed plate is fixedly connected between the upper support plate and the lower support plate, and the ends of the upper support plate and the lower support plate close to the two mounting plates are fixedly connected to a fixed plate to form a fixed bracket. The rotating shaft is rotatably connected to the fixed bracket. The fixed bracket is rotatably connected to the two mounting plates.

[0009] A through hole and an arc-shaped through hole are provided on the mounting plate. The through hole is located opposite to the intersection of the rotating shaft and the motor output shaft. The center of the arc-shaped through hole is the center of the through hole. A central axis and a movable axis are provided on the side of the two fixed plates away from the upper support plate and the lower support plate. The central axis passes through the through hole and is rotatably connected to the mounting plate. The movable axis is located in the arc-shaped through hole. The central axis is connected to a driving device, which drives the central axis to rotate and drives the movable axis to move along the arc-shaped through hole.

[0010] The movable shaft body is provided with a coaxial threaded blind hole, and the fixing bolt passes through the arc-shaped through hole and is threadedly connected to the threaded blind hole of the movable shaft body to fix the movable shaft body and the mounting plate.

[0011] The rotating shaft includes a transmission shaft and a central shaft. The transmission shaft is rotatably connected to the support frame, and the transmission shaft is connected to the output shaft of the motor through a conversion assembly; the central shaft is threadedly connected to one end of the transmission shaft away from the motor.

[0012] The fixing tool includes a lower fixing plate and an upper fixing plate. A raised table is provided at one end of the transmission shaft away from the motor. The transmission shaft is provided with an external thread on the side of the raised table away from the motor. The lower fixing plate is threadedly connected to the external thread position of the transmission shaft. The central shaft is provided with a mounting table, and an external thread is provided on the side of the mounting table away from the transmission shaft. The upper fixing plate is threadedly connected to the external thread of the central shaft.

[0013] The adapter assembly is a universal joint, one end of which is connected to the output shaft of the motor, and the other end of which is connected to the rotating shaft; or the adapter assembly is a first bevel gear and a second bevel gear, the first bevel gear is connected to the output shaft of the motor, the second bevel gear is connected to the rotating shaft, and the first bevel gear and the second bevel gear are meshed.

[0014] It also includes a reducer, the output shaft of the motor is connected to the input shaft of the reducer, and the output shaft of the reducer is connected to the rotating shaft through a switching component so that the motor drives the rotating shaft to rotate.

[0015] A method for automatically detecting the surface coating of a thrust chamber is provided, using any of the above-mentioned automatic detection devices for detecting the surface coating of a thrust chamber, comprising:

[0016] According to the workpiece to be measured, loosen the fixing bolts and use the driving device to drive the fixing bracket to rotate to adjust the angle between the rotating axis and the surface of the equipment fixed platform until the generatrix at the top of the cone surface of the workpiece to be measured remains horizontal, turn off the driving device, and tighten the fixing bolts;

[0017] Fix the workpiece to be measured on the rotating axis by fixing the fixture;

[0018] The motor drives the rotating shaft to rotate together with the workpiece to be measured, and the X-ray transmitting and receiving device performs real-time detection of the coating on the conical surface of the workpiece to be measured.

[0019] The X-ray emitting and receiving device includes components such as an X-ray tube, a filter, a shutter, a collimator and a detector. During operation, the X-ray tube generates electrons when heating the cathode, and after being accelerated by high voltage, they bombard the anode material to generate primary X-ray radiation (primary radiation). The filter can optimize the energy distribution of the primary X-rays. When the primary X-ray radiation emitted by the X-ray tube bombards the surface of the coating, the electrons in the electron layer of the coating are excited to generate holes, and then the outer electrons fill the holes, and the excess energy is released in the form of X-ray fluorescence (also called secondary X-rays). The measured element is determined by analyzing the wavelength of the collected X-ray fluorescence spectrum, and the thickness of the coating is determined by the intensity and energy of its light.

[0020] The automatic rotation device includes a motor, a reducer, a bevel gear, a rotating shaft and a fixed tooling, which can realize the rotation of the product under test under different speed requirements; the fixed tooling fixes the product by fixing the fixed plates at both ends of the product under test, and a rotating shaft is provided between the fixed plates at both ends, which can not only fix the fixed plates at both ends, but also be connected to the equipment rotating device to realize the rotation of the product under test around the central axis at a set rotation speed; the control system is used to process the coating thickness information collected by the X-ray transmitting and receiving device, model the product under test and calculate the corresponding thickness, so as to realize the measurement of the coating thickness data of all the profiles of the product under test.

[0021] The control system includes functions such as start-up and termination, preset rotation speed, modeling calculation and export.

[0022] Preferably, the clamping angle of the product to be measured on the fixed tooling (i.e., the angle between the central axis of the product to be measured and the equipment clamping platform after clamping) is equal to the angle between the conical surface of the product to be measured and the central axis. The purpose is to make the conical surface to be measured parallel to the fixed platform of the equipment after the product is clamped and fixed, and to make the product surface perpendicular to the X-ray during the measurement process, so as to obtain accurate coating thickness data.

[0023] In summary, this application at least includes the following beneficial technical effects:

[0024] 1. High measurement accuracy: The present invention adopts a specific tooling to fix the workpiece to be measured, so as to ensure the stability of the measurement process and improve the measurement accuracy; and adopts an automatic rotation detection device, and the equipment control center performs modeling and calculation on the entire surface of the workpiece to be measured, so as to obtain more measurement data and reduce errors.

[0025] 2. High measurement efficiency: For workpieces of the same size and shape, it is only necessary to set the tooling angle and program once to complete the measurement of the coating thickness of batch workpieces, which improves the measurement efficiency.

[0026] 3. Wide scope of application: The present invention is applicable to conical workpieces of different shapes, sizes and tapers, and meets the measurement requirements of the coating thickness of the inner wall of thrust chambers of different types of rocket engines.

[0027] 4. High degree of automation: The invention has less manual operation, simple measurement operation, high degree of automation, and can automatically obtain the workpiece coating thickness information according to the software program. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the present invention;

[0029] Figure 2 This is a schematic diagram of the working principle of the X-ray transmitting and receiving device of the present invention;

[0030] Figure 3 This is a schematic diagram of the structure of the equipment control center of the present invention;

[0031] Figure 4 It is a flow chart of the operation steps of the present invention;

[0032] Figure 5 This is the tooling schematic diagram;

[0033] Figure 6 This is the structural diagram of the mounting plate.

[0034] Description of reference numerals:

[0035] 1. Motor; 1-1. Reducer;

[0036] 2-support frame; 21-mounting plate; 22-upper support plate; 23-lower support plate;

[0037] 3- adapter assembly (the first bevel gear and the second bevel gear, or a universal joint);

[0038] 4-rotation axis; 41-transmission axis; 42-center axis;

[0039] 5-fixed tooling; 51-lower fixed plate; 52-upper fixed plate;

[0040] 6-equipment fixing platform; 7-measured workpiece; 8-X-ray transmitting and receiving device; 9-X-ray; 10-equipment control center; 11-X-ray tube; 12-filter; 13-shutter; 14-collimator; 15-detector; 16-display screen; 17-start / stop button; 18-modeling calculation button; 19-preset rotation speed function area. DETAILED DESCRIPTION

[0041] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments disclosed in the present invention will be further described in detail below with reference to the accompanying drawings.

[0042] The present application embodiment discloses an automatic detection device for the surface coating of a thrust chamber, such as Figure 1 As shown, it includes an X-ray transmitting and receiving device 8, an automatic rotating device, an equipment fixing platform 6 and an equipment control center 10.

[0043] The schematic diagram of the working principle of the X-ray transmitting and receiving device 8 is shown in the attached figure. Figure 2 As shown, it includes components such as an X-ray tube 11, a filter 12, a shutter 13, a collimator 14 and a detector 15. During operation, the X-ray tube 11 generates electrons when heating the cathode, which bombard the anode material after high-voltage acceleration to generate primary X-ray radiation (primary radiation). The filter 12 can optimize the energy distribution of the primary X-rays. The detector 15 determines the measured element by analyzing the wavelength of the collected X-ray fluorescence spectrum, and determines the thickness of the coating by the intensity and energy of its light.

[0044] The automatic rotating device includes a motor 1, a reducer 1-1, a support frame 2, a switching assembly 3, a rotating shaft 4 and a fixed fixture 5, which can realize the rotation of the product 7 under different speed requirements; the fixed fixture 5 fixes the product by fixing the fixed disks at both ends of the cone-shaped product 7 under test, and a rotating shaft 4 is provided between the fixed disks at both ends, which can not only fix the fixed disks at both ends, but also be connected to the equipment rotating device to realize the rotation of the product 7 under test around the central axis at the set rotation speed; the control system is used to process the coating thickness information collected by the X-ray transmitting and receiving device 7, model the product under test and calculate the corresponding thickness, and realize the measurement of the coating thickness data of all the profiles of the product under test. The control system includes functions such as start and stop, preset rotation speed, modeling calculation and export.

[0045] The adapter component 3 is a universal joint, one end of which is connected to the output shaft of the motor 1, and the other end of the universal joint is connected to the rotating shaft 4; or the adapter component 3 is a first bevel gear and a second bevel gear, the first bevel gear is connected to the output shaft of the motor 1, the second bevel gear is connected to the rotating shaft 4, and the first bevel gear and the second bevel gear are meshed.

[0046] like Figure 5 and Figure 6 As shown, two mounting plates 21 are provided in parallel with each other, the bottom end of the mounting plate 21 is fixedly connected to the surface of the equipment fixing platform 6, the upper support plate 22 and the lower support plate 23 are located between the two mounting plates 21; the ends of the upper support plate 22 and the lower support plate 23 close to the two mounting plates 21 are fixedly connected to a fixing plate; a fixing bracket is formed; the rotating shaft 4 is rotatably connected to the fixing bracket; the fixing bracket is rotatably connected to the two mounting plates 21; a through hole and an arc through hole are opened on the mounting plate 21, and the position of the through hole is directly opposite to the intersection of the rotating shaft 4 and the output shaft of the motor 1, The center of the arc-shaped through hole is the center of the through hole. A central axis and a movable axis are provided on the side of the two fixed plates away from the upper support plate 22 and the lower support plate 23. The central axis passes through the through hole and is rotatably connected to the mounting plate 21, and the movable axis is located in the arc-shaped through hole; the central axis is connected to a driving device, which drives the central axis to rotate and drives the movable axis to move along the arc-shaped through hole; the movable axis is provided with a coaxial threaded blind hole, and a fixing bolt passes through the arc-shaped through hole and is threadedly connected to the threaded blind hole of the movable axis to fix the movable axis to the mounting plate 21.

[0047] The rotating shaft 4 includes a transmission shaft 41 and a center shaft 42 . The transmission shaft 41 is rotatably connected to the support frame 2 , and the transmission shaft 41 is connected to the output shaft of the motor 1 via a switching assembly 3 . The center shaft 42 is threadedly connected to one end of the transmission shaft 41 away from the motor 1 .

[0048] One end of the transmission shaft is provided with an internal thread and the other end is provided with an external thread. The internal thread matches the external thread of the universal joint, and the external thread matches the internal thread of the center shaft. Two raised surfaces are provided on the transmission shaft for fixing the transmission shaft on the upper support plate and fixing the axial position of the lower fixing plate on the transmission shaft.

[0049] The fixing fixture 5 includes a lower fixing plate 51 and an upper fixing plate 52. A protruding table is provided at one end of the transmission shaft 41 away from the motor 1. The transmission shaft 41 is provided with an external thread on the side of the protruding table away from the motor 1. The lower fixing plate 51 is threadedly connected to the external thread position of the transmission shaft 41. The central shaft 42 is provided with a mounting table, and an external thread is provided on the side of the mounting table away from the transmission shaft 41. The upper fixing plate 52 is threadedly connected to the external thread of the central shaft 42.

[0050] One end of the central shaft is provided with an external thread and the other end is provided with an internal thread. The size of the external thread matches the internal thread on the upper fixed plate. A boss is provided at the internal thread end for fixing the axial position of the lower fixed plate on the transmission shaft.

[0051] When replacing the same product for testing, you only need to remove the upper fixed plate and replace the product, and then install the upper fixed plate after replacement; when replacing a product with equal Angle 2 but a changed inner diameter, there is no need to adjust the drive shaft, only replace the upper and lower fixed plates, remove the center shaft and reinstall them in the order of installing the lower fixed plate, installing the center shaft, installing the product and the upper fixed plate; when replacing a product with inconsistent Angle 2, it is necessary to re-adjust the position of the fixed bracket relative to the mounting plate 1 to ensure that Angle 1 and Angle 2 are complementary.

[0052] Re-adjust the position of the fixed bracket relative to the mounting plate 1, including: loosening the fixing bolts and driving the fixed bracket to rotate through the driving device to adjust the angle between the rotating axis 4 and the surface of the equipment fixing platform 6 until the generatrix of the top of the cone surface of the workpiece 7 to be measured remains horizontal, turning off the driving device, and tightening the fixing bolts.

[0053] like Figure 3 As shown, the device control center 10 includes a display screen 16, a start / stop button 17, a modeling calculation button 18, and a preset rotation speed function area 19. The start / stop button 17 is used to control the start and stop of the motor 1, the preset rotation speed function area 19 is used to set the rotation speed of the motor 1, and the display screen 16 is used to display status information, such as: the rotation speed of the motor 1, the state of the motor 1 is started or shut down, etc.; the modeling calculation button 18 is used to calculate the start and start.

[0054] The thrust chamber surface coating automatic detection technology, the measurement process is as follows Figure 4 As shown, it mainly includes the following steps:

[0055] Step 1: Fix the product 7 to be tested by the fixing tool 5 and install it on the fixing platform 6;

[0056] Specifically, the operator fixes the product 7 to be tested by means of the fixing tool 5 and installs it on the equipment fixing platform 6, and makes the clamping angle of the product 7 to be tested equal to the angle between the conical surface of the product 7 and the central axis, that is, the conical surface of the product 7 to be tested remains horizontal, so that the X-ray transmitting and receiving device 8 can accurately obtain the information of the coating thickness of the profile, thereby completing the installation and fixation of the product to be tested.

[0057] Step 2: The device control center 10 presets the rotation speed and drives the tested product 7 to rotate;

[0058] The operator presets the rotation speed through the equipment control center 10 and selects the appropriate workpiece rotation speed in the preset rotation function area 19. After startup, the control system controls the reducer 1-1 according to the preset speed. The reducer 1-1 drives the tooling rotating shaft 4 through the transmission gear 3 (bevel gear) to make the measured product 7 rotate at a uniform speed at the preset angle and rotation speed.

[0059] Step 3: Drive the X-ray transmitting and receiving device 8 to the top of the product 7 to transmit X-rays and collect information;

[0060] After the product 7 to be tested rotates at a uniform and stable speed, the equipment control center 10 issues a command to drive the X-ray transmitting and receiving device 8 to move above the product 7 to transmit X-rays and collect the received X-ray information under the control of the robot arm;

[0061] Step 4: Modeling and calculating the collected product surface thickness information through the equipment control center 10;

[0062] The equipment control center 10 automatically models and calculates the surface coating information of the tested product 7 based on the information collected by the transmitting and receiving device 8;

[0063] Step 5: Export the coating thickness information of the entire surface of the tested product 7.

[0064] The equipment control center 10 automatically processes the coating information and exports the coating thickness of the entire surface of the measured product 7 into a worksheet, completing the accurate, automatic and efficient measurement of the coating thickness. The operator can obtain the coating thickness information of the measured product 7 by connecting to an external computer.

[0065] So far, the present invention has been used to complete the detection of the coating thickness information on the outer surface of the inner wall of the thrust chamber.

[0066] In summary, the present invention is based on the working principle of the X-ray thickness gauge, designs a tooling system suitable for fixing the thrust chamber of a rocket engine, and proposes an automatic coating detection technology and device. First, the product to be tested is fixed by a fixed tooling and installed on the fixed platform of the equipment to keep the measured cone surface horizontal; secondly, the rotation speed of the product is preset through the equipment control center, and the product is driven to rotate steadily and uniformly; thirdly, the equipment control center issues instructions to control the X-ray transmitting and receiving device to go above the cone surface to emit X-rays and collect information; then, the equipment control center models and calculates the collected data; finally, the equipment control center exports the coating thickness information of the entire surface of the product to be tested to the worksheet, and the accurate, automatic and efficient measurement of the coating thickness on the inner wall surface of the thrust chamber can be completed.

[0067] The contents not described in detail in this application specification belong to the common knowledge of those skilled in the art.

[0068] The present application is described in detail above in conjunction with specific implementation methods and exemplary examples, but these descriptions cannot be understood as limiting the present application. Those skilled in the art understand that, without departing from the spirit and scope of the present application, a variety of equivalent replacements, modifications or improvements can be made to the technical solution of the present application and its implementation methods, all of which fall within the scope of the present application. The scope of protection of the present application shall be subject to the attached claims.

Claims

1. An automatic detection device for thrust chamber surface coating, characterized in that: It includes an X-ray transmitting and receiving device (8), an automatic rotating device and an equipment fixing platform (6); The automatic rotating device is arranged on the equipment fixing platform (6) and is used to install the cone-shaped workpiece (7) to be measured, and generally adjusts the angle between the axis of the workpiece (7) to be measured and the equipment fixing platform (6) so that the generatrix of the top of the cone surface of the workpiece (7) to be measured is kept horizontal, and drives the workpiece (7) to be measured to rotate around its own axis; The X-ray emitting and receiving device (8) is located above the workpiece (7) to be measured and is used to measure the coating thickness of the conical surface of the workpiece (7) to be measured which rotates around its own axis.

2. The thrust chamber surface coating automatic detection device according to claim 1, characterized in that: The automatic rotating device comprises a motor (1), a support frame (2), an adapter assembly (3), a rotating shaft (4) and a fixing fixture (5); the support frame (2) is arranged on the surface of a device fixing platform (6); the rotating shaft (4) is connected to the support frame (2), and the angle between the rotating shaft (4) and the surface of the device fixing platform (6) is adjusted by the support frame (2); the fixing fixture (5) is connected to the rotating shaft (4) and is used to coaxially mount a workpiece (7) to be measured on the rotating shaft (4); the output shaft of the motor (1) and the rotating shaft (4) are connected via the adapter assembly (3), so that the motor (1) drives the rotating shaft (4) to rotate, thereby driving the workpiece (7) to be measured to rotate around its own axis.

3. The thrust chamber surface coating automatic detection device according to claim 2 is characterized in that: The support frame (2) comprises a mounting plate (21), an upper support plate (22), a lower support plate (23) and a fixed plate. Two mounting plates (21) are provided which are parallel to each other. The bottom end of the mounting plate (21) is fixedly connected to the surface of the equipment fixing platform (6). The upper support plate (22) and the lower support plate (23) are parallel to each other. The upper support plate (22) and the lower support plate (23) are located between the two mounting plates (21). The fixed plate is fixedly connected between the upper support plate (22) and the lower support plate (23). The ends of the upper support plate (22) and the lower support plate (23) close to the two mounting plates (21) are fixedly connected to a fixed plate to form a fixed bracket. The rotating shaft (4) is rotatably connected to the fixed bracket. The fixed bracket is rotatably connected to the two mounting plates (21).

4. The thrust chamber surface coating automatic detection device according to claim 3 is characterized by: The mounting plate (21) is provided with a through hole and an arc-shaped through hole, the through hole is located opposite to the intersection of the rotating shaft (4) and the output shaft of the motor (1), the center of the arc-shaped through hole is the center of the through hole, and a central axis and a movable axis are provided on the side of the two fixed plates away from the upper support plate (22) and the lower support plate (23), the central axis passes through the through hole and is rotatably connected to the mounting plate (21), and the movable axis is located in the arc-shaped through hole; the central axis is connected to a driving device, and the driving device drives the central axis to rotate and drives the movable axis to move along the arc-shaped through hole.

5. The thrust chamber surface coating automatic detection device according to claim 4, characterized in that: The movable shaft body is provided with a coaxial threaded blind hole, and a fixing bolt passes through the arc-shaped through hole and is threadedly connected to the threaded blind hole of the movable shaft body to fix the movable shaft body and the mounting plate (21).

6. The thrust chamber surface coating automatic detection device according to claim 2, characterized in that: The rotating shaft (4) comprises a transmission shaft (41) and a central shaft (42); the transmission shaft (41) is rotatably connected to the support frame (2), and the transmission shaft (41) is connected to the output shaft of the motor (1) via a conversion assembly (3); and the central shaft (42) is threadedly connected to an end of the transmission shaft (41) away from the motor (1).

7. The thrust chamber surface coating automatic detection device according to claim 6, characterized in that: The fixing fixture (5) comprises a lower fixing plate (51) and an upper fixing plate (52); a protruding table is provided at one end of the transmission shaft (41) away from the motor (1); the transmission shaft (41) is provided with an external thread at a side of the protruding table away from the motor (1); the lower fixing plate (51) is threadedly connected to the external thread position of the transmission shaft (41); the central shaft (42) is provided with a mounting table, and an external thread is provided at a side of the mounting table away from the transmission shaft (41); the upper fixing plate (52) is threadedly connected to the external thread of the central shaft (42).

8. The thrust chamber surface coating automatic detection device according to claim 1 is characterized by: The adapter assembly (3) is a universal joint, one end of which is connected to the output shaft of the motor (1), and the other end of which is connected to the rotating shaft (4); Alternatively, the adapter assembly (3) comprises a first bevel gear and a second bevel gear, the first bevel gear is connected to the output shaft of the motor (1), the second bevel gear is connected to the rotating shaft (4), and the first bevel gear and the second bevel gear are meshed with each other.

9. The thrust chamber surface coating automatic detection device according to claim 1, characterized in that: It also includes a reducer (1-1), wherein the output shaft of the motor (1) is connected to the input shaft of the reducer (1-1), and the output shaft of the reducer (1-1) is connected to the rotating shaft (4) via an adapter component (3), so that the motor (1) drives the rotating shaft (4) to rotate.

10. A method for automatically detecting the surface coating of a thrust chamber, characterized in that: The method of using an automatic detection device for the surface coating of a thrust chamber as claimed in any one of claims 1 to 9 for detection comprises: According to the workpiece (7) to be measured, loosen the fixing bolts, and drive the fixing bracket to rotate through the driving device to adjust the angle between the rotating shaft (4) and the surface of the equipment fixing platform (6) until the generatrix at the top of the cone surface of the workpiece (7) to be measured remains horizontal, turn off the driving device, and tighten the fixing bolts; The workpiece (7) to be measured is fixed on the rotating shaft (4) by means of a fixing fixture (5); The motor (1) drives the rotating shaft (4) and the workpiece (7) to rotate together, and the X-ray emitting and receiving device (8) performs real-time detection of the coating on the conical surface of the workpiece (7) to be measured.

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