Testing device and testing method for equivalent sample piece coating of revolving body part coating

Abstract

The invention belongs to the technical field of rotary body part coating detection, and particularly relates to an equivalent sample piece coating testing device and testing method for a rotary body part coating. According to the equivalent sample piece coating testing device for the rotary body part coating, through threaded connection holes of the supporting frame and the base, adjustment of any angle of the base and the sample piece carrying table is achieved, fine adjustment of the inclination angle of the sample piece is achieved through simple mechanisms such as a rectangular through groove and straight teeth in one end of the supporting frame, and the requirements for different spraying angles are met; the light weight of the device is achieved through the weight reduction through grooves and the air holes, heat accumulation of the device in the coating preparation process is avoided, material selection consistent with a rotary body part is further adopted, the consistency of thermal expansion coefficients is ensured, and sample piece deformation is avoided; through simple mechanisms such as the fastening hole, the spring, the fixing piece, the special-shaped groove and the fastening piece, the sample piece is fixed in the shallow groove on the premise that coating preparation is not affected, the fixing piece and the special-shaped groove have obvious fool-proof design, and reverse installation is prevented.

Description

Technical Field

[0001] The present invention belongs to the technical field of coating detection for rotary parts, and particularly relates to a coating test device and test method for an equivalent sample of a rotary part coating. Background Art

[0002] Currently, mainstream fixed-wing aircraft are developing towards "ultra-stealth", "ultra-maneuverable", "supersonic cruise", "ultra-information perception", etc. Among them, the development of "ultra-maneuverable" and "supersonic cruise" will inevitably lead to a continuous increase in the operating temperature of the hot-end components and exhaust components of the engine. The parts in this type of area are affected by the high-temperature environment and airflow, and the surface erosion of the parts will become more and more serious. It is urgent to prepare a protective coating with better performance on the surface of such components; in addition, to achieve the function of "ultra-stealth", the parts in this type of area need to have certain electromagnetic wave absorption performance to avoid radar detection. The current solution is still to prepare a coating on the surface of the parts in this type of area. Therefore, the demand for preparing coatings on the surface of hot-end components and exhaust components using thermal spraying technology is unprecedentedly high.

[0003] Thermal spraying technology is a process that uses a heat source to heat powder, wire, or suspension to a molten state and spray it at high speed on the surface of the parts to be coated to solidify - stack - deposit to form a coating. This process has relatively strict requirements on the uniformity of the coating on the surface of the parts. The current method for detecting the performance of the parts coating is to obtain the coating by using a fixed spraying flat test piece (furnace sample) and other methods and detect it. The coating performance detection result of the test piece (furnace sample) is equivalently used to replace the coating performance of the parts. This method is close to the detection result of simple parts, but there is a large deviation in the detection result of complex parts, especially rotary parts. Common engine rotary parts include a center cone represented by an approximate cone, a heat shield represented by a cylinder with an approximate rectangular cross-section, a confluence ring, a vibration-proof screen, and a single-head combustion chamber flame tube represented by a cylinder with an approximate trapezoidal cross-section. The detection methods for the mechanical properties or organizational structure of the coating adopted by aviation standards and national standards all focus on coating the coating on the surface of a fixed-plane test piece to replace the detection of the coating performance of the parts, and do not mention various interference factors involved in the spraying process of rotary parts and the equivalent replacement detection method.

[0004] In view of this, the present invention is specifically proposed. Summary of the Invention

[0005] The purpose of the present invention is to overcome the above-mentioned disadvantages of the prior art and provide a coating test device and test method for an equivalent sample of a rotary part coating.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] On the one hand, the present invention provides an equivalent sample coating testing device for the coating of rotary parts, including a disc. Along the radial direction on the top surface of the disc, at least four sets of rectangular grooves are evenly arranged in a rotational manner. Each set of rectangular grooves is adapted to a sample clamping mechanism. The sample clamping mechanism includes a base capable of adjusting its position on the set of rectangular grooves and a sample stage hinged to the base and capable of adjusting a specific angle. On the side surface of the sample stage away from the base, a plurality of shallow grooves for placing the sample to be sprayed are provided.

[0008] Preferably, along the radial direction on the top surface of the disc, four sets of rectangular grooves are evenly arranged in a rotational manner. Each set of rectangular grooves includes two rectangular grooves. A frustum is also provided at the center of the disc, and the diameter of the frustum is adapted to the distance between the two rectangular grooves in each set of rectangular grooves.

[0009] Preferably, the base is provided with a boss for hinging with the sample stage. A pin hole is provided on the boss, and a shaft hole adapted to the pin hole is provided on the sample stage. The base and the sample stage are hinged by a pin passing through the pin hole and the shaft hole.

[0010] Preferably, on the side surface of the sample stage away from the base, there are eight shallow grooves arranged in four rows and two columns. A ventilation hole penetrating the sample stage is provided at the center of each shallow groove. The eight shallow grooves are four-direction shallow grooves and four circular shallow grooves.

[0011] Specifically, the sample clamping mechanism further includes a support frame. One end of the support frame is provided with a round hole, and the other end is provided with a rectangular through groove. A plurality of threaded connection holes respectively adapted to the round hole are provided on the side surface of the base. First threaded holes adapted to the rectangular through groove are provided on the side surfaces of the sample stage. The round hole is screwed to the corresponding threaded connection hole through a fastener, and the rectangular through groove is screwed to the first threaded hole through a fastener, so as to realize the adjustment of the base and the sample stage at a specific angle. By adjusting the round hole and the adapted threaded connection hole, the angle between the base and the sample stage is adjusted in a large range, and then by adjusting the relative position between the first threaded hole and the rectangular through groove, the angle between the base and the sample stage is finely adjusted until the angle between the base and the sample stage is adjusted to match the angle of the rotary part.

[0012] Preferably, straight teeth for increasing friction are provided on the two long sides of the rectangular through groove.

[0013] Preferably, a pin shaft slot adapted to the pin shaft is further provided on the side of the support frame close to the base. When the sample stage needs to be vertically arranged, the pin shaft is stuck in the pin shaft slot to ensure the verticality of the sample stage.

[0014] Specifically, fastening holes communicating with each shallow groove are provided on the side of the sample stage. Springs that are adapted to the dimensions of the fastening holes and are used to fix the samples in the shallow grooves are provided in the fastening holes. A step for limiting the springs is formed between the bottom surface of the fastening hole and the shallow groove. Multiple second threaded holes for fixing the fixing pieces are further provided on the side of the sample stage. The fixing pieces are fixed to the side of the sample stage through fasteners, so as to limit the springs in the fastening holes. Further, a special-shaped groove for accommodating the fixing pieces is provided on the side of the sample stage. The fixing pieces are adapted to the shape of the straight-toothed special-shaped groove, preventing the fixing pieces from being installed reversely during installation.

[0015] Preferably, the second threaded holes and the fastening holes are staggeredly distributed.

[0016] Specifically, a weight-reducing through groove is provided on one side of the sample stage close to the base.

[0017] Specifically, a plurality of through holes adapted to the rectangular groove group are provided on the base. A fastener adapted to the dimensions of the rectangular groove group is provided in each through hole, so as to fix the base on the disc by using the friction force between the fastener and the rectangular groove group.

[0018] Preferably, two groups of through holes adapted to the rectangular groove are provided on the base, with two in each group. The central axes of the two groups of through holes intersect perpendicularly with the center line of the rectangular groove respectively; the width of the rectangular groove is adapted to the diameter of the fastener, ensuring that the base can be fixed on the disc by using the friction force when the fastener is inserted into the rectangular groove through the through hole.

[0019] Preferably, when the rotary part is nearly conical and a coating needs to be applied to the outer wall of the conical part, when installing the sample clamping mechanism, the side of the sample stage for installing the sample faces away from the center of the disc, and the angle between the base and the sample stage is greater than 90°.

[0020] Specifically, the disc, the base, the sample stage, the support frame, the pin shaft, the fixing piece and the fastener included in this equivalent sample coating test device are all made of graphite.

[0021] On the other hand, the present invention provides a test method for an equivalent sample coating test device for coating a rotary part, and the specific steps are as follows:

[0022] Step 1: Place the disc on the mechanical turntable and fix it with a three-jaw chuck.

[0023] Step 2: Fix the samples to be sprayed in the shallow grooves respectively, and place springs in the four fastening holes respectively. Use fasteners to fix the fixing pieces in the special-shaped grooves through three fixing holes and the second threaded holes.

[0024] Step 3: After the base and the sample carrier are hinged by a pin shaft, a fastener passes through the threaded connection hole closest to the pin shaft hole of the base and is connected to the round hole of the connection support frame. The pin shaft slot of the support frame is snapped into the pin shaft. Another fastener passes through the rectangular through slot on one side of the support frame and the first threaded hole of the sample carrier for connection. Adjust the position of the fastener at the pin shaft slot and tighten it so that the eight shallow groove planes of the loading surface of the sample carrier are perpendicular to the axis direction of the disc, that is, adjust the sample carrier to the angle matching the rotary body part.

[0025] Step 4: Fix each sample clamping mechanism with adjusted angle on the rectangular groove group, and adjust the distance between the sample clamping mechanism and the center of the disc until the profiling structure composed of the samples to be sprayed is consistent with the shape of the rotary body part.

[0026] Step 5: Adjust the direction of the spray gun flame flow to be 90° to the surface of the sample to be sprayed, adjust the rotation speed of the mechanical turntable and the moving speed of the spray gun, and complete the coating of the sample by using the same spraying method as that for spraying the rotary body part.

[0027] Step 6: After spraying, remove the sample, and use the surface coating of the sample as an equivalent to the surface coating of the rotary body part to carry out the detection work on the organizational structure, bonding strength, and thermal shock performance of the coating.

[0028] Specifically, when the cross-section of the rotary body part is a cylinder with an approximately rectangular shape, the calculation formula for the rotation speed of the mechanical turntable is shown in Equation 1:

[0029] V zx = V s ×1000×60 / π / D Equation 1

[0030] Wherein, V zx is the rotation speed of the mechanical turntable, with the unit of m / s;

[0031] D is the inner diameter of the rectangular cylinder, with the unit of mm;

[0032] V s is the linear velocity of a certain point on the inner wall edge of the rectangular cylinder, and the value range is 1 - 1.3 m / s;

[0033] The calculation formula for the moving speed of the spray gun is shown in Equation 2:

[0034] V g = V zx ×S l / 60 Equation 2

[0035] Wherein, V g is the moving speed of the spray gun, with the unit of mm / s;

[0036] V zx is the rotation speed of the mechanical turntable;

[0037] S l is the distance that the spray gun moves in the radial direction of the inner wall of the rectangular cylinder relative to a certain point on the edge of the inner wall of the rectangular cylinder when the mechanical turntable rotates one circle, and the value range is 3 - 5 mm; S l It takes values within a specific range, and the specific value is determined by the diameter of the projection circle of the spray gun flame flow cross-section on the surface of the part.

[0038] Specifically, when the cross-section of the rotary part is a cylinder with an approximately trapezoidal shape, the calculation formula for the rotational speed of the mechanical turntable is shown in Equation 3:

[0039] V zy = V s ×1000×60 / π / [D m -H(D m -D n ) / L y )] Equation 3

[0040] where H is the axial distance of a certain point on the axis in the trapezoidal cylinder starting from the large end, with the unit of mm;

[0041] V zy is the rotational speed of the mechanical turntable corresponding to a certain point on the axis in the trapezoidal cylinder, with the unit of m / s;

[0042] L y is the axial distance from the larger end to the smaller end of the trapezoidal cylinder, with the unit of mm;

[0043] D h is the diameter of the cylinder corresponding to point H in the trapezoidal cylinder, with the unit of mm;

[0044] D m is the diameter of the larger end in the trapezoidal cylinder, with the unit of mm;

[0045] D n is the diameter of the smaller end in the trapezoidal cylinder, with the unit of mm;

[0046] V s is the linear velocity of a certain point on the edge of the inner wall of the trapezoidal cylinder, and the value range is 1 - 1.3 m / s;

[0047] The calculation formula for the moving speed of the spray gun is shown in Equation 4:

[0048] V gy = V zy ×S2 / 60 Equation 4

[0049] where,

[0050] V gy is the moving speed of the spray gun corresponding to a certain point on the axis in the trapezoidal cylinder, with the unit of mm / s;

[0051] V zy is the rotational speed of the mechanical turntable corresponding to a certain point on the axial direction inside the trapezoidal cylinder, with the unit of m / s;

[0052] S2 is the distance that the spray gun moves in the radial direction of the trapezoidal cylinder relative to a certain point on the inner wall edge of the trapezoidal cylinder when the mechanical turntable rotates one circle. The value range is 3 - 5 mm; The value of S2 is within a specific range, and the specific value is determined by the diameter of the projection circle of the spray gun flame flow cross-section on the part surface.

[0053] Specifically, when the rotating body part is near a cone, the outer wall of the conical cylinder part needs to be coated with a coating. The calculation formula for the rotational speed of the mechanical turntable is as shown in Equation 5:

[0054] V zz = V s ×1000×60 / π / [D L - H z ×D L / L)] Equation 5

[0055] Among them, H z is the axial distance from a certain point on the axial direction outside the conical cylinder starting from the large end, with the unit of mm;

[0056] V zz is the rotational speed of the mechanical turntable corresponding to a certain point on the axial direction inside the conical cylinder, with the unit of m / s;

[0057] L is the height of the conical cylinder, with the unit of mm;

[0058] D z is the cylinder diameter corresponding to point H inside the conical cylinder z with the unit of mm;

[0059] D L is the diameter of the bottom surface of the conical cylinder, with the unit of mm;

[0060] V s is the linear velocity of a certain point on the inner wall edge of the conical cylinder, and the value range is 1 - 1.3 m / s;

[0061] The calculation formula for the moving speed of the spray gun is as shown in Equation 6:

[0062] V gz = V zz ×S3 / 60 Equation 6

[0063] Among them, V gz is the moving speed of the spray gun corresponding to a certain point on the axial direction inside the conical cylinder, with the unit of mm / s;

[0064] V zz is the rotational speed of the mechanical turntable corresponding to a certain point on the axial direction inside the conical cylinder;

[0065] S3 is the distance that the spray gun moves in the radial direction of the conical cylinder relative to a certain point on the inner wall edge of the conical cylinder when the mechanical turntable rotates one circle, and the value range is 3 to 5 mm. S3 takes values ​​within a specific range, and the specific value is determined by the diameter of the projection circle of the spray gun flame flow section on the part surface.

[0066] It should be noted that the parameters related to the cylinder appearing in the above content are all for the purpose of equivalently explaining the parameters related to the sample on the sample carrier; by coating the sample on the sample carrier, the coating of the rotating parts in actual situations is equivalently simulated.

[0067] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0068] 1) The present invention provides an equivalent sample coating test device for a rotating part coating. Through the threaded connection holes of the support frame and the base, the base and the sample carrier can be adjusted at any angle. The sample tilt angle can be fine-tuned through simple mechanisms such as a rectangular through slot and straight teeth at one end of the support frame to meet the requirements of different spraying angles. The weight-reducing through slots and air holes are used to achieve lightweighting of the device and avoid heat accumulation during the coating preparation process. The material selection consistent with the rotating part is further used to ensure the consistency of the thermal expansion coefficient to avoid sample deformation. Through simple mechanisms such as fastening holes, springs, fixing plates, special-shaped grooves and fasteners, the sample is fixed in a shallow groove without affecting the coating preparation. The fixing plates and special-shaped grooves have obvious fool-proof designs to prevent reverse installation.

[0069] 2) The present invention applies coatings and tests on the surface of fixed plane samples according to the current navigation mark and national standard, and uses this result to replace the detection method of the coating structure and performance of the rotating parts, ignoring the problems of superposition interference between the surface linear velocity and the spray gun speed caused by the difference in the part profile and the rotation of the rotating parts during the spraying process of the rotating parts. The device of the present invention classifies common rotating parts such as central cones, heat shields, confluence rings, vibration-proof screens, single-head flame tubes, etc. into three categories: cylinders with approximate conical shapes, cylinders with approximate rectangular cross-sections, and cylinders with approximate trapezoidal cross-sections. The state of the disc and the sample clamping mechanism is adjusted to adapt to the spraying profiles of the three types of rotating parts, and the detection samples close to the coating structure of the rotating parts are obtained;

[0070] 3) The present invention proposes a test method for the equivalent sample coating preparation process according to the sizes of rotating parts with different shapes. By considering the spray gun movement speed, turntable rotation speed and edge line speed, a reasonable test mechanism is formulated to obtain a sample coating with good consistency with the rotating parts coating structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0071] The accompanying drawings are incorporated in and constitute a part of this specification and, together with the description, serve to explain the principles of the present invention.

[0072] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0073] Figure 1 It is a three-dimensional structure schematic diagram of the present invention;

[0074] Figure 2 It is a schematic diagram of the disc structure of the present invention;

[0075] Figure 3 It is a schematic diagram of the base structure of the present invention;

[0076] Figure 4 It is a schematic diagram of the sample carrier structure of the present invention;

[0077] Figure 5 It is a schematic diagram of the support frame structure of the present invention;

[0078] Figure 6 It is a schematic diagram of the fixing piece structure of the present invention;

[0079] Figure 7 It is a schematic diagram of the sample clamping mechanism structure of the present invention;

[0080] Figure 8 It is a schematic diagram of an equivalent sample when the cross-section of the rotary part of the present invention is approximately rectangular;

[0081] Figure 9 It is a schematic diagram of an equivalent sample when the cross-section of the rotary part of the present invention is approximately trapezoidal;

[0082] Figure 10 It is a schematic diagram of an equivalent sample when the rotary part of the present invention is nearly conical.

[0083] Among them: 1 is a disc; 11 is a frustum; 12 is a rectangular groove; 2 is a sample clamping mechanism; 21 is a base; 211 is a boss; 212 is a pin hole; 213 is a through hole; 214 is a threaded connection hole; 22 is a sample carrier; 221 is a fastening hole; 222 is a shaft hole; 223 is a shallow groove; 224 is a weight-reducing through groove; 225 is a special-shaped groove; 226 is a first threaded hole; 227 is a second threaded hole; 2201 is a ventilation hole; 2202 is a spring; 23 is a support frame; 231 is a round hole; 232 is a rectangular through groove; 233 is a straight tooth; 234 is a pin slot; 24 is a pin; 25 is a fixing piece; 251 is a fixing hole. Specific embodiments

[0084] Exemplary embodiments will be described in detail herein, and examples thereof are shown in the accompanying drawings. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. On the contrary, they are merely examples consistent with some aspects of the present invention detailed in the appended claims.

[0085] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0086] Embodiment

[0087] Referring to Figure 1-10 As shown, the present invention provides an equivalent sample coating test device for a rotary part coating, including a disc 1. Along the radial direction on the top surface of the disc 1, at least four rectangular groove groups are evenly arranged in a rotating manner. Each rectangular groove group is adapted to a sample clamping mechanism 2. The sample clamping mechanism 2 includes a base 21 capable of adjusting its position on the rectangular groove group and a sample stage 22 hinged to the base 21 and capable of adjusting a specific angle. On the side surface of the sample stage 22 away from the base 21, a plurality of shallow grooves 223 for placing the sample to be sprayed are provided. Referring to Figure 1 As shown.

[0088] Preferably, four rectangular groove groups are evenly arranged in a rotating manner along the radial direction on the top surface of the disc 1. Each rectangular groove group includes two rectangular grooves 12. A frustum 11 is also provided at the center of the disc. The diameter of the frustum 11 is adapted to the distance between the two rectangular grooves 12 in each rectangular groove group. Referring to Figure 2 As shown.

[0089] Preferably, the base 21 is provided with a boss 211 for hinging with the sample stage 22. A pin hole 212 is provided on the boss 211. The sample stage 22 is provided with a shaft hole 222 adapted to the pin shaft hole 212. The base 21 and the sample stage 22 are hinged by a pin 24 passing through the pin hole 212 and the shaft hole 222. Referring to Figure 3 As shown.

[0090] Preferably, on the side surface of the sample stage 22 away from the base 21, eight shallow grooves 223 are provided in four rows and two columns. A ventilation hole 2201 penetrating the sample stage 22 is provided at the center of each shallow groove 223. The eight shallow grooves 223 are four square shallow grooves and four circular shallow grooves. Referring to Figure 4 As shown.

[0091] Specifically, the sample clamping mechanism 2 further includes a support frame 23. One end of the support frame 23 is provided with a round hole 231, and the other end is provided with a rectangular through slot 232. A plurality of threaded connection holes 214 adapted to the round holes 231 respectively are provided on the side surface of the base 21. First threaded holes 226 adapted to the rectangular through slots 232 are provided on the side surfaces of the sample stage 22. The round hole 231 is screwed to the corresponding threaded connection hole 214 through a fastener, and the rectangular through slot 232 is screwed to the first threaded hole 226 through a fastener, so as to realize the adjustment of the base 21 and the sample stage 22 at a specific angle. By adjusting the round hole 231 and the adapted threaded connection hole 214, the angle between the base 21 and the sample stage 22 can be adjusted within a large range. Then, by adjusting the relative position between the first threaded hole 226 and the rectangular through slot 232, the angle between the base 21 and the sample stage 22 can be finely adjusted until the angle between the base 21 and the sample stage 22 is adjusted to match the angle of the rotary body part. See Figure 7 as shown.

[0092] Preferably, straight teeth 233 for increasing friction are provided on two long sides of the rectangular through slot 232. See Figure 5 as shown.

[0093] Preferably, a pin shaft slot 234 adapted to the pin shaft 24 is further provided on one side of the support frame 23 close to the base 21. When the sample stage 22 needs to be vertically arranged, the pin shaft 24 is stuck in the pin shaft slot 234 to ensure the verticality of the sample stage 22.

[0094] Specifically, fastening holes 221 respectively communicating with each shallow groove 223 are provided on the side of the sample stage 22. Springs 2202 adapted to the sizes thereof and used for fixing the samples in the shallow grooves 223 are provided in the fastening holes 221. A step for limiting the springs 2202 is formed between the bottom surface of the fastening holes 221 and the shallow grooves 223. A plurality of second threaded holes 227 for fixing the fixing pieces 25 are further provided on the side of the sample stage 22. The fixing pieces 25 are fixed on the side of the sample stage 22 through fasteners, so as to limit the springs 2202 in the fastening holes 221. Further, a special-shaped groove 225 for accommodating the fixing pieces 25 is provided on the side of the sample stage 22. The fixing pieces 25 are adapted to the shape of the straight-toothed special-shaped groove 225 to prevent the fixing pieces 25 from being installed reversely during installation. See Figure 4 、 6 、7 as shown.

[0095] Preferably, the second threaded holes 227 and the fastening holes 221 are staggeredly distributed.

[0096] Specifically, a weight-reducing through slot 224 is provided on one side of the sample stage 22 close to the base 21.

[0097] Specifically, the base 21 is provided with a plurality of through holes 213 matched with the rectangular groove group, and each through hole 213 is provided with a fastener matched with the size of the rectangular groove group, so that the base 21 is fixed on the disk 1 by utilizing the friction between the fastener and the rectangular groove group.

[0098] Preferably, the base 21 is provided with two groups of through holes 213 adapted to the rectangular groove 12, two in each group, and the central axes of the two groups of through holes 213 intersect and are perpendicular to the central lines of the rectangular groove 12 respectively; the width of the rectangular groove 12 is adapted to the diameter of the fastener, so that when the fastener is inserted into the rectangular groove 12 through the through holes 213, the base 21 can be fixed on the disc 1 by friction, see Figure 3 shown.

[0099] Preferably, when the rotating part is a near cone, it is necessary to coat the outer wall of the conical part. Then, when the sample clamping mechanism 2 is installed, the side of the sample carrier 22 on which the sample is installed faces away from the center of the disk 1, and the angle between the base 21 and the sample carrier 22 is greater than 90°.

[0100] Specifically, the disc 1, base 21, sample carrier 22, support frame 23, pin 24, fixing plate 25 and fasteners included in the equivalent sample coating testing device are all made of graphite.

[0101] Scenario 1

[0102] See also Figure 8 As shown, when the cross section of the rotating body part is a cylindrical body with an approximate rectangular shape, the test method of the equivalent sample coating test device has the following specific steps:

[0103] Step 1, place the disc 1 on the mechanical turntable and fix it with three claws;

[0104] Step 2, fix the samples to be sprayed in the shallow grooves 223 respectively, and put the springs 2202 in the four fastening holes 221 respectively, and use fasteners to fix the fixing plate 25 in the special-shaped groove 225 through the three fixing holes 251 and the second threaded hole 227;

[0105] Step 3, after the base 21 and the sample carrier 22 are hinged by the pin shaft 24, the fastener passes through the threaded connection hole 214 of the base 21 closest to the pin shaft hole 212 to connect with the circular hole 231 of the connecting support frame 23, the pin shaft slot 234 of the support frame 23 is inserted into the pin shaft 24, and another fastener is used to pass through the rectangular through slot 232 on one side of the support frame 23 and connect with the first threaded hole 226 of the sample carrier 22, adjust the position of the fastener at the pin shaft slot 234 and tighten it, so that the plane of the eight shallow grooves 223 on the loading surface of the sample carrier 22 is perpendicular to the axial direction of the disk 1, that is, the sample carrier 22 is adjusted to match the angle of the rotating body part;

[0106] Step 4: Turn the side of the base 21 with the boss 211 towards the axis direction of the disk 1, adjust the linear distance between the four bases 21 and the axis of the disk 1, so that the surface distance of the samples in the eight shallow grooves 223 from the axis of the disk 1 is 200 mm. At the same time, use fasteners to pass through the through holes 213 to fix the base 21 on the disk 1, so that the profiling structure composed of the samples to be sprayed is consistent with the shape of the rotary body part;

[0107] Step 5: Adjust the direction of the spray gun flame flow to be 90° with the surface of the sample to be sprayed, adjust the rotation speed of the mechanical turntable and the moving speed of the spray gun, and complete the coating of the sample by using the same spraying method as that for spraying the rotary body part; Preferably, the moving direction of the spray gun is vertically downward, and the part material is superalloy 3536;

[0108] The calculation formula for the rotation speed of the mechanical turntable is shown in Equation 1:

[0109] V zx = V s ×1000×60 / π / D Equation 1

[0110] Where, V zx is the rotation speed of the mechanical turntable, with the unit of m / s;

[0111] D is the inner diameter of the rectangular cylinder, specifically 400 mm;

[0112] V s is the linear velocity of a certain point on the inner wall edge of the rectangular cylinder, and the value range is 1 m / s;

[0113] The calculation formula for the moving speed of the spray gun is shown in Equation 2:

[0114] V g = V zx ×S l / 60 Equation 2

[0115] Where, V g is the moving speed of the spray gun, with the unit of mm / s;

[0116] V zx is the rotation speed of the mechanical turntable;

[0117] S l is the distance that the spray gun moves relative to a certain point on the inner wall edge of the rectangular cylinder in the radial direction of the rectangular cylinder when the mechanical turntable rotates one circle, and the value range is 3 mm; S l takes values within a specific range, and the specific value is determined by the projected circle diameter of the spray gun flame flow cross-section on the part surface

[0118] Step 6: After the spraying is completed, remove the sample. Use the surface coating of the sample to equivalently replace the surface coating of the rotary body part to carry out the detection work on the coating's organizational structure, bonding strength, and thermal shock performance. After testing, the coating's organizational structure is dense, the average bonding strength is 25 MPa, and it can withstand 425 air-cooling thermal shocks at 900 °C.

[0119] It should be noted that the material of the rotary body part is superalloy 3536, and all the relevant parameters of the rectangular cylinder mentioned in the text are for equivalently explaining the relevant parameters of the sample on the sample stage; by coating the sample on the sample stage, it equivalently simulates the coating process of the rotary body part (a cylinder with an approximately rectangular cross-section) under actual conditions.

[0120] Case 2

[0121] See Figure 9 As shown, when the cross-section of the rotary body part is a cylinder with an approximately trapezoidal shape, the test method of the equivalent sample coating test device is as follows:

[0122] Step 1: Place the disc 1 on the mechanical turntable and fix it with a three-jaw chuck.

[0123] Step 2: Fix the sample to be sprayed in the shallow grooves 223 respectively, and place springs 2202 in the four fastening holes 221 respectively. Use fasteners to fix the fixing piece 25 in the special-shaped groove 225 through the three fixing holes 251 and the second threaded hole 227.

[0124] Step 3: After hinging the base 21 and the sample stage 22 with a pin shaft 24, use a fastener to pass through the threaded connection hole 214 of the base 21 farthest from the pin shaft hole 212 and connect it with the round hole 231 of the connection support frame 23. Use another fastener to pass through the rectangular through groove 232 on one side of the support frame 23 and the first thread of the sample stage 22 for connection, so that the eight shallow groove 223 planes on the loading surface of the sample stage 22 are inclined at an angle α with the axis direction of the disc 1, and the angle α is the same as the inclination angle between the inner surface of the part and the axis, that is, adjust the sample stage 22 to match the angle of the rotary body part.

[0125] Step 4: Place the side of the base 21 with the boss 211 facing the axis direction of the disc 1, adjust the axial distance between the four bases 21 and the disc 1, so that the minimum distance from the surface of the sample in the eight shallow grooves 223 to the axis of the disc 1 is 50 mm and the maximum distance is 150 mm. At the same time, use a fastener to pass through the through hole 213 to fix the base 21 on the disc 1, so that the profiling structure composed of the samples to be sprayed is consistent with the shape of the rotary body part.

[0126] Step 5: Adjust the direction of the spray gun flame to be 90° to the surface of the sample to be sprayed. Adjust the rotation speed of the mechanical turntable and the moving speed of the spray gun, and complete the coating of the sample using the same spraying method as for the rotary parts.

[0127] The calculation formula for the rotation speed of the mechanical turntable is shown in Equation 3:

[0128] V zy = V s ×1000×60 / π / [D m - H(D m - D n ) / L y )] Equation 3

[0129] Where, H is the axial distance from a certain point on the axis in the trapezoidal cylinder starting from the large end, in mm;

[0130] V zy is the rotation speed of the mechanical turntable corresponding to a certain point on the axis in the trapezoidal cylinder, in m / s;

[0131] L y is the axial distance from the larger end to the smaller end of the trapezoidal cylinder, specifically 120 mm;

[0132] D h is the cylinder diameter corresponding to point H in the trapezoidal cylinder, specifically 150 mm;

[0133] D m is the diameter of the larger end in the trapezoidal cylinder, specifically 300 mm;

[0134] D n is the diameter of the smaller end in the trapezoidal cylinder, specifically 100 mm;

[0135] V s is the linear velocity of a certain point on the inner wall edge of the trapezoidal cylinder, and the value range is 1.2 m / s;

[0136] The calculation formula for the moving speed of the spray gun is shown in Equation 4:

[0137] V gy = V zy × S2 / 60 Equation 4

[0138] Where, V gy is the moving speed of the spray gun corresponding to a certain point on the axis in the trapezoidal cylinder, in mm / s;

[0139] V zy is the rotation speed of the mechanical turntable corresponding to a certain point on the axis in the trapezoidal cylinder, in m / s;

[0140] S2 is the distance that the mechanical turntable rotates one circle and the spray gun moves relative to a certain point on the inner wall edge of the trapezoidal cylinder body in the radial direction of the trapezoidal cylinder body, and the value range is 4 mm; S2 takes values within a specific range, and the specific value is determined by the diameter of the projection circle of the spray gun flame flow section on the part surface

[0141] Step 6: After spraying is completed, remove the sample piece, and use the surface coating of the sample piece to equivalently replace the surface coating of the rotary body part to carry out the detection work on the organizational structure, bonding strength, and thermal shock performance of the coating. After detection, the organizational structure of the coating is dense, the average bonding strength is 13 MPa, and the air-cooled thermal shock at 300 °C is 352 times

[0142] It should be noted that the material of the rotary body part is C / C composite material, and all the relevant parameters related to the trapezoidal cylinder body in the text are for equivalently explaining the relevant parameters of the sample piece on the sample piece stage; by coating the sample piece on the sample piece stage, it is equivalently simulated that the rotary body part (a cylinder with an approximately trapezoidal cross-section) is coated in actual situations

[0143] Situation 3

[0144] See Figure 10 As shown, when the rotary body part is near a cone, the outer wall of the conical cylinder part needs to be coated. The testing method of the equivalent sample piece coating testing device is as follows

[0145] Step 1: Place the disc 1 on the mechanical turntable and fix it with a three-jaw chuck

[0146] Step 2: Fix the sample piece to be sprayed in the shallow grooves 223 respectively, and place springs 2202 in the four fastening holes 221 respectively. Use fasteners to fix the fixing piece 25 in the special-shaped groove 225 through the three fixing holes 251 and the second threaded hole 227

[0147] Step 3: After hinging the base 21 and the sample piece stage 22 with a pin shaft 24, the fastener passes through the threaded connection hole 214 in the middle of the base 21 and is connected to the circular hole 231 of the connection support frame 23. Use another fastener to pass through the rectangular through groove 232 on one side of the support frame 23 and the first threaded hole 226 of the sample piece stage 22 for connection, so that the eight shallow groove 223 planes of the loading surface of the sample piece stage 22 are inclined at an angle β with the axis direction of the disc 1, and the angle β is the same as the inclination angle of the outer surface of the part and the axis, that is, adjust the sample piece stage 22 to match the angle of the rotary body part

[0148] Step 4: Turn the side of the base 21 with the boss 211 towards the outer circle of the disc 1, adjust the linear distance between the four bases 21 and the axis of the disc 1, so that the maximum distance from the surface of the sample in the eight shallow grooves 223 to the axis of the disc 1 is the bottom diameter of the cone, which is 160 mm. Use fasteners to pass through the through holes 213 to fix the base 21, so that the profiling structure formed by the sprayed samples is consistent with the shape of the rotary body part;

[0149] Step 5: Adjust the direction of the spray gun flame flow to be 90° to the surface of the sample to be sprayed, adjust the rotation speed of the mechanical turntable and the moving speed of the spray gun, and complete the coating of the sample by using the same spraying method as that for spraying the rotary body part;

[0150] The calculation formula for the rotation speed of the mechanical turntable is shown in Equation 5:

[0151] V zz = V s ×1000×60 / π / [D L -H z ×D L / L)] Equation 5

[0152] Where, H z is the axial distance of a certain point in the conical cylinder from the large end, specifically 160 mm;

[0153] V zz is the rotation speed of the mechanical turntable corresponding to a certain point in the conical cylinder, in units of m / s;

[0154] L is the height of the conical cylinder, specifically 280 mm;

[0155] D z is the cylinder diameter corresponding to point H in the conical cylinder z , in units of mm;

[0156] D L is the diameter of the bottom surface of the conical cylinder, specifically 320 mm;

[0157] V s is the linear velocity of a certain point on the inner wall edge of the conical cylinder, and the value range is 1.3 m / s;

[0158] The calculation formula for the moving speed of the spray gun is shown in Equation 6:

[0159] V gz = V zz ×S3 / 60 Equation 6

[0160] Where, V gz is the moving speed of the spray gun corresponding to a certain point in the conical cylinder, in units of mm / s;

[0161] Vzz is the rotational speed of the mechanical turntable corresponding to a certain point in the axial direction within the conical cylinder;

[0162] S3 is the distance that the spray gun moves in the radial direction of the conical cylinder relative to a certain point on the inner wall edge of the conical cylinder when the mechanical turntable rotates one circle, and the value range is 5 mm; S3 takes values within a specific range, and the specific value is determined by the diameter of the projection circle of the spray gun flame flow cross-section on the part surface;

[0163] Step 6: After spraying is completed, remove the sample piece, and use the surface coating of the sample piece to equivalently replace the surface coating of the rotary body part to carry out the detection work on the organizational structure, bonding strength, and thermal shock performance of the coating. After detection, the organizational structure of the coating is dense, the average bonding strength is 15 MPa, and the thermal shock at 1100 °C in air is 648 times.

[0164] It should be noted that the material of the conical part is a ceramic matrix composite material, and the relevant parameters related to the conical cylinder in the text are all for equivalently explaining the relevant parameters of the sample piece on the sample carrier; by coating the sample piece on the sample carrier, it equivalently simulates the coating application of the rotary body part (cone) under actual conditions.

[0165] In summary, through the verification of the present invention of this embodiment, the invention is used to equivalently test the surface coating of the rotary body part to carry out the detection work on the organizational structure, bonding strength, and thermal shock performance of the coating. After detection, it is consistent with the coating performance detection of the actual spraying on the surface of the rotary body part and meets the use requirements.

[0166] It also should be noted that the fasteners in the text are parts such as bolts, screws, and pins that play a fastening role, and are not limited to the above three parts. Other parts that can play a fastening role can be used.

[0167] The above are only 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. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention.

[0168] 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. An equivalent sample coating test device for a rotating part coating, characterized in that: The invention comprises a disc (1), wherein the top surface of the disc (1) is evenly and radially arranged with at least four rectangular groove groups, each of which is adapted to fit a sample clamping mechanism (2), and the sample clamping mechanism (2) comprises a base (21) capable of adjusting its position on the rectangular groove group, and a sample carrier (22) hinged to the base (21) and capable of adjusting a specific angle, wherein a side of the sample carrier (22) away from the base (21) is provided with a plurality of shallow grooves (223) for placing samples to be sprayed.

2. The equivalent sample coating testing device according to claim 1, characterized in that: The sample clamping mechanism (2) also includes a support frame (23), one end of which is provided with a circular hole (231) and the other end of which is provided with a rectangular through groove (232); the side surface of the base (21) is provided with a plurality of threaded connection holes (214) respectively matched with the circular holes (231), and the side surface of the sample carrier (22) is provided with a first threaded hole (226) matched with the rectangular through groove (232); the circular hole (231) is screwed to the corresponding threaded connection hole (214) through a fastener, and the rectangular through groove (232) is screwed to the first threaded hole (226) through a fastener, so as to realize the adjustment of the base (21) and the sample carrier (22) at a specific angle.

3. The equivalent sample coating testing device according to claim 2, characterized in that: The two long sides of the rectangular through slot (232) are provided with straight teeth (233) for increasing friction.

4. The equivalent sample coating testing device according to claim 1, characterized in that: The side of the sample carrier (22) is provided with a fastening hole (221) which is respectively connected to each shallow groove (223); a spring (2202) which is adapted to the size of the fastening hole (221) and is used to fix the sample in the shallow groove (223); the fastening hole (221) and the bottom surface of the shallow groove (223) form a step for limiting the spring (2202); the side of the sample carrier (22) is also provided with a plurality of second threaded holes (227) for fixing a fixing plate (25); the fixing plate (25) is fixed to the side of the sample carrier (22) by a fastener, so as to limit the spring (2202) in the fastening hole (221).

5. The equivalent sample coating testing device according to claim 4, characterized in that: A special-shaped groove (225) for accommodating a fixing plate (25) is provided on the side of the sample carrier (22), and the fixing plate (25) is adapted in shape to the special-shaped groove (225) in the shape of a straight tooth.

6. The equivalent sample coating testing device according to claim 1, characterized in that: The base (21) is provided with a plurality of through holes (213) adapted to the rectangular slot groups, and each through hole (213) is provided with a fastener adapted to the size of the rectangular slot group, so that the base (21) is fixed to the disc (1) by utilizing the friction force between the fastener and the rectangular slot group.

7. The testing method of the equivalent sample coating testing device according to any one of claims 1 to 6, characterized in that: The specific steps are as follows: Step 1, place the disc (1) on the mechanical turntable and fix it with three claws; Step 2, the samples to be sprayed are fixed in the shallow grooves (223) respectively; Step 3, after the base (21) and the sample carrier (22) are hinged, the sample carrier (22) is adjusted to match the angle of the rotating body part; Step 4, fix each sample clamping mechanism (2) with adjusted angle on the rectangular groove group, and adjust the distance between the sample clamping mechanism (2) and the center of the disc (1) until the contour structure composed of the sample to be sprayed is consistent with the shape of the rotating body part; Step 5: Adjust the direction of the spray gun flame flow to be perpendicular to the surface of the sample to be sprayed, adjust the mechanical turntable speed and the spray gun movement speed, and use the spraying method consistent with the spraying rotating parts to complete the coating of the sample; Step 6: After spraying, remove the sample and use the surface coating of the sample to replace the surface coating of the rotating part to carry out the inspection of the coating's organizational structure, bonding strength, and thermal shock performance.

8. The testing method according to claim 7, characterized in that: When the cross section of the rotating body part is a cylindrical body that is approximately rectangular, the calculation formula of the rotation speed of the mechanical turntable is as shown in Formula 1: In zx = V s ×1000×60 / π / D Equation 1 Among them, V zx is the mechanical turntable speed, in m / s; D is the inner diameter of the rectangular cylinder, in mm; V s is the linear velocity of a point on the inner wall edge of the rectangular cylinder, ranging from 1 to 1.3 m / s; The calculation formula of the spray gun moving speed is shown in Formula 2: V g = V zx ×S l / 60 Formula 2 Among them, V g is the movement speed of the spray gun, in mm / s; V zx is the mechanical turntable speed; S l When the mechanical turntable rotates one circle, the distance that the spray gun moves in the radial direction of the rectangular cylinder relative to a certain point on the edge of the inner wall of the rectangular cylinder ranges from 3 to 5 mm.

9. The testing method according to claim 7, characterized in that: When the cross section of the rotating body part is a cylinder approximately in the shape of a trapezoid, the calculation formula of the rotation speed of the mechanical turntable is as shown in Formula 3: V zy = V s ×1000×60 / π / [D m -H(D m -D n ) / L y )] Equation 3 Wherein, H is the axial distance from a certain axial point in the trapezoidal cylinder to the large end, in mm; V zy The speed of the mechanical turntable corresponding to a certain axial point in the trapezoidal cylinder, in m / s; L y It is the axial distance from the larger end to the smaller end of the trapezoidal cylinder, in mm; D h is the cylinder diameter corresponding to point H in the trapezoidal cylinder, in mm; D m It is the diameter of the larger end of the trapezoidal cylinder, in mm; D n It is the diameter of the smaller end of the trapezoidal cylinder, in mm; V s is the linear velocity of a point on the inner wall edge of the trapezoidal cylinder, ranging from 1 to 1.3 m / s; The calculation formula of the spray gun moving speed is shown in Formula 4: V gy = V zy ×S2 / 60 Formula 4 in, V gy The moving speed of the spray gun corresponding to a certain axial point in the trapezoidal cylinder, in mm / s; V zy The speed of the mechanical turntable corresponding to a certain axial point in the trapezoidal cylinder, in m / s; S2 is the distance that the spray gun moves in the radial direction of the trapezoidal cylinder relative to a certain point on the inner wall edge of the trapezoidal cylinder when the mechanical turntable rotates one circle, and the value range is 3 to 5 mm.

10. The testing method according to claim 7, characterized in that: When the rotating body part is a near cone, the outer wall of the conical cylinder part needs to be coated. The calculation formula of the mechanical turntable speed is shown in Formula 5: V zz = V s ×1000×60 / π / [D L -H z ×D L / L)] Equation 5 Among them, H z It is the axial distance from a certain axial point in the cone to the large end, in mm; V zz The speed of the mechanical turntable corresponding to a certain axial point in the conical cylinder, in m / s; L is the height of the conical cylinder, in mm; D z H in the conical cylinder z The cylinder diameter corresponding to the point, in mm; D L is the diameter of the bottom of the conical cylinder, in mm; V s is the linear velocity of a point on the inner wall edge of the conical cylinder, ranging from 1 to 1.3 m / s; The calculation formula of the spray gun moving speed is shown in Formula 6: V gz = V zz ×S3 / 60 Type 6 Among them, V gz The moving speed of the spray gun corresponding to a certain axial point in the conical cylinder, in mm / s; V zz The speed of the mechanical turntable corresponding to a certain axial point in the conical cylinder; S3 is the distance that the spray gun moves in the radial direction of the conical cylinder relative to a certain point on the inner wall edge of the conical cylinder when the mechanical turntable rotates one circle, and the value range is 3 to 5 mm.

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