A device and method for non-destructive measurement of the thickness of a blade multi-shell form

Abstract

The application discloses a kind of vane multilayer shell thickness nondestructive measurement device and measurement method, belong to aero-engine parts precision casting technical field, it includes following steps: connecting reference bar on vane wax mould, scanning vane wax mould;Fire-resistant slurry and fire-resistant sand are sprayed on vane wax mould;Second scanning is carried out to vane wax mould, obtains three-dimensional model containing wax mould appearance and a layer shell simultaneously;Second layer fire-resistant slurry and fire-resistant sand are sprayed to vane wax mould;Third scanning is carried out to vane wax mould, third scanning result is fitted to the first two scanning results, obtains three-dimensional model containing wax mould appearance, first layer shell and second layer shell simultaneously;In this way, three-dimensional model with multilayer shell surface is obtained, to measure and calculate the thickness of each layer shell at different positions of vane.The method does not depend on the skill level of operator, the reference datum of uniformity of multiple measurements before and after, very convenient to operate, high measurement accuracy.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of precision casting of aero-engine parts, in particular, relates to a kind of vane multilayer formwork thickness nondestructive testing device. Furthermore, the present application also relates to a kind of measuring method comprising the above-mentioned vane multilayer formwork thickness nondestructive testing device. BACKGROUND

[0002] The information provided in this section is for the purpose of generally presenting the context of the present application. To the extent that the descriptions in this section describe the work of the inventors, and to the extent that the descriptions are not considered to be prior art to the present application, the descriptions are not, and should not be considered to be, admitted as prior art to the present application.

[0003] In order to improve the temperature capacity, the hot end vane of the aero-engine usually has three mainstream technologies, and the hollow air cooling design of the vane is an important one. The cold air passes through the complex channel inside the vane to take away the heat of the vane. When the vane has a cavity, considering the strength of the vane when rotating at high temperature and high speed, the heat exchange efficiency when the cold air passes through the inner cavity and other performance and safety requirements, the wall thickness size from the cavity area to the vane body surface is often required.

[0004] Investment casting is still the main production process for producing aero-engine turbine vanes, and the main processes are mold making, shell making, pouring and post-processing. Shell making is a process of coating a specified number of refractory slurry and refractory material on the wax mold assembly tree, and after drying, a shell with a cavity is prepared. Currently, this process can be realized by manual or automatic means.

[0005] The effect of wax mold assembly hanging slurry is directly related to the operator or the control program of the mechanical hand. When manual spraying is used, the operator needs to adjust the posture of the mold assembly while observing the slurry flow, to avoid slurry accumulation, ensure uniform slurry coating, and ultimately obtain a uniform thickness shell. However, due to uncontrollable factors such as slurry viscosity (flowability evaluation index) fluctuations and operator skill level, the actual obtained shell is prone to uneven thickness, affecting the casting solidification sequence and deteriorating the metallurgical quality of the casting.

[0006] In the production process, there is a more difficult problem, that is, how to measure the thickness of each layer of shell at different positions of the vane?

[0007] On the one hand, the shell is attached to the surface of the wax mold, so the overall shape is consistent with the shape of the wax mold, and has a complex three-dimensional curved surface. On the other hand, the shell is composed of slurry sand, and the sand particles themselves are irregular in shape, which also determines the uneven surface characteristics of the shell. With the increase of the number of shell layers and the size of sand particles, it is even more so.

[0008] The industry has a method of using CT radiography to obtain the wall thickness size of complex hollow castings. But this method is difficult to achieve satisfactory imaging effect for the mold shell composed of refractory powder and refractory sand with similar density, and it is also impossible to characterize and measure because the interface between each layer of the mold shell is not clear.

[0009] After long-term research, we propose a method for measuring the thickness of each layer of the mold shell at different positions of the blade.

[0010] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present application, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. SUMMARY

[0011] In view of at least one of the above technical problems, the present application provides a non-destructive measurement device for the thickness of a multi-layer mold shell of a blade, which can effectively improve the uniformity of the slurry by clamping the reference rod, rotating the reference rod and the blade wax mold by the motor, and spraying the slurry by the spray gun at this time.

[0012] The present application also provides a measurement method using the above non-destructive measurement device for the thickness of a multi-layer mold shell of a blade.

[0013] According to one aspect of the present application, a non-destructive measurement device for the thickness of a multi-layer mold shell of a blade is provided, which is used to clamp a blade wax mold and spray refractory slurry and refractory sand on the blade wax mold by a spray gun to form a mold shell on the surface thereof. The non-destructive measurement device for the thickness of a multi-layer mold shell of a blade comprises a reference rod, a mounting table, a spraying box, a limiting plate assembly, a push rod assembly, a gear pair assembly and a motor.

[0014] The reference rod is used to be connected at the tenon head riser of the blade wax mold. A plurality of reference grooves are provided on the reference rod at intervals. The reference grooves are used to paste reference points in the form of stickers. Bearings are provided on the reference rod at intervals.

[0015] The spraying box is provided beside the mounting table. A limiting groove is provided on the top of the mounting table. The limiting groove is used to limit the reference rod and the bearings and make the blade wax mold rotatably suspended in the spraying box. The limiting plate assembly is provided on both sides of the limiting groove. The push rod assembly is provided on both sides of the limiting groove in pairs. The limiting plate assemblies on both sides are connected with the push rod assemblies on both sides, respectively. The push rod assemblies on both sides are used to push the limiting plate assemblies on both sides to close to clamp and limit the bearings, or to separate to release the limitation of the bearings.

[0016] A mounting hole is provided on the side wall of the side of the mounting table away from the spraying box. The motor is provided in the mounting hole and drives the reference rod and the blade wax mold to rotate through the gear pair assembly, and then sprays the blade wax mold in the rotating process with refractory slurry and refractory sand through the spray gun.

[0017] In some embodiments of the present application, the limiting plate assembly comprises a first limiting plate and a second limiting plate arranged at intervals along the length direction of the limiting groove, and two first limiting plates are arranged on both sides of the limiting groove and connected with the push rod assemblies on both sides respectively, and two second limiting plates are arranged on both sides of the limiting groove and connected with the push rod assemblies on both sides respectively.

[0018] In some embodiments of the present application, the push rod assembly comprises a push rod, a rotating member and a support plate, the push rod is used to connect with the first limiting plate and the second limiting plate on one side of the limiting groove simultaneously, the support plate is arranged on the top of the mounting table and arranged at intervals with the push rod, the support plate is provided with a connecting screw hole, the rotating member is used to threadedly cooperate with the connecting screw hole, the first end of the rotating member is used to connect with a pre-set connecting bearing on the push rod, the rotating member is used to drive the push rod to perform a translation movement of approaching or moving away from the limiting groove in the process of screwing into or out of the connecting screw hole, thereby driving the first limiting plate and the second limiting plate on both sides to fold or separate to loosen the limiting of the bearing.

[0019] In some embodiments of the present application, the second end of the rotating member is provided with a hand wheel.

[0020] In some embodiments of the present application, the gear pair assembly comprises a driving wheel and a driven wheel, the driving wheel is connected with the output shaft of the motor, and the driven wheel is arranged at the tail end of the reference bar, the driving wheel is used to mesh with the driven wheel and drive the driven wheel to rotate.

[0021] In some embodiments of the present application, the bearing is arranged on both sides of the reference bar and avoids the reference groove.

[0022] In some embodiments of the present application, the top of the spraying box is open, the inside of the spraying box is used to contain clean water, and the bottom of the spraying box is provided with a drain port.

[0023] According to another aspect of the present application, a blade multi-layer formwork thickness nondestructive measurement method is also provided, which uses the blade multi-layer formwork thickness nondestructive measurement device, and comprises the following steps:

[0024] S100, connecting the reference bar at the tenon head riser of the blade wax mold, and pasting the reference point in the reference groove;

[0025] S200, scanning the blade wax mold using a blue light scanner, and obtaining the original wax mold shape size model on the ATOS software;

[0026] S300, wrapping the reference bar with adhesive tape;

[0027] S400, spraying refractory slurry and refractory sand on the blade wax mold using a spray gun, and placing and drying the blade wax mold coated with the refractory slurry and the refractory sand;

[0028] S500, remove the tape wrapped on the reference rod, use the blue light scanner to perform a second scan on the blade wax mold, and on the ATOS software, fit the second scan result with the scan result in step S200 through the accurate reference points on the reference rod to obtain a three-dimensional model containing the wax mold shape and a layer of mold shell;

[0029] S600, wrap the reference rod with the tape again, use the spray gun to spray the blade wax mold with a second layer of refractory slurry and refractory sand, and stand and dry;

[0030] S700, remove the tape wrapped on the reference rod, use the blue light scanner to perform a third scan on the blade wax mold, and on the ATOS software, fit the third scan result to the previous two scan results through the reference reference points on the reference rod to obtain a three-dimensional model containing the wax mold shape, the first layer of mold shell and the second layer of mold shell;

[0031] S800, and so on, to obtain a three-dimensional model with a multi-layer mold shell surface for measuring and calculating the thickness of each layer of mold shell at different positions of the blade.

[0032] In some embodiments of the present application, in steps S300 and S600, when wrapping the reference rod with the tape, the tape needs to cover and shield the reference reference points, and the tape does not cover the blade wax mold.

[0033] In some embodiments of the present application, in step S800, the three-dimensional model processing software Geomagic is used to obtain the thickness of each layer of mold shell at different positions of the blade.

[0034] The present application has the following beneficial effects:

[0035] The blade multi-layer mold shell thickness non-destructive measurement device of the present application connects the reference rod to the blade wax mold, the reference rod is provided with reference grooves at intervals, and the reference reference points in the form of stickers are pasted in the reference grooves to serve as reference points for scanning and measurement. The reference grooves arranged at intervals are beneficial to improve the accuracy of pasting the reference reference points each time and prevent the reference reference points in the form of stickers from easily loosening and shifting. At the same time, the reference rod is limited by the limiting groove of the mounting table, and the blade wax mold is suspended in the spraying box. The outer ring of the bearing on the reference rod is clamped and limited by the push rod assembly and the limiting plate assembly. The motor drives the reference rod and the blade wax mold to rotate through the gear pair. At this time, the operator sprays the blade wax mold through the spray gun, which reduces the shaking or shaking phenomenon caused by manually holding the blade wax mold, effectively ensures the uniformity of the slurry, avoids affecting the solidification sequence of the casting, and ensures the metallurgical quality of the casting.

[0036] The blade multilayer shell thickness nondestructive measurement method of the application also has the above beneficial effects, and further comprises using a non-contact measurement method, setting a reference rod on the blade wax mold, and scanning the initial blade model; subsequently, after each layer of shell is dried, scanning the blade wax mold with the same state of the reference rod, thereby obtaining a three-dimensional model with the surface of the multilayer shell, and finally realizing the measurement of the thickness of each layer of shell at different positions of the blade. The method does not depend on the skill level of the operator, has a unified reference standard for multiple measurements, is very convenient to operate, and has high measurement accuracy.

[0037] Of course, implementing any product of the application does not necessarily require achieving all the advantages described above. In addition to the purposes, features and advantages described above, the application has other purposes, features and advantages. The application will be further described in detail below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0038] The accompanying drawings, which form a part of this application, are intended to provide further understanding of the application and are incorporated herein in

[0039] Figure 1 is a schematic view of a blade wax mold of the preferred embodiment of the application;

[0040] Figure 2 is a schematic view of an original wax mold shape size model;

[0041] Figure 3 is a three-dimensional model schematic view containing a wax mold shape and a layer of shell;

[0042] Figure 4 is a schematic view of the root section wall thickness measurement result of the preferred embodiment of the application;

[0043] Figure 5 is a schematic view of the blade tip section wall thickness measurement result of the preferred embodiment of the application;

[0044] Figure 6 is a schematic view of the installation table of the preferred embodiment of the application;

[0045] Figure 7 is a schematic view of the structure of the push rod assembly of the preferred embodiment of the application;

[0046] Figure 8 is a schematic view of the installation of the limiting plate assembly of the preferred embodiment of the application;

[0047] Figure 9 is a schematic view of the installation of the gear pair assembly of the preferred embodiment of the application;

[0048] Fig. 1 is a schematic view of a blade wax model according to the preferred embodiment of the present application; DETAILED DESCRIPTION

[0049] The embodiments of the present application are described in detail below with reference to the accompanying drawings, but the present application can be implemented in various different ways as defined and covered by the following description.

[0050] Figure 1 Fig. 1 is a schematic view of a blade wax model according to the preferred embodiment of the present application; Figure 2 Fig. 2 is a schematic view of an original wax model size model according to the preferred embodiment of the present application; Figure 3 Fig. 3 is a schematic view of a three-dimensional model containing both a wax model shape and a layer of a mold shell according to the preferred embodiment of the present application; Figure 4 Fig. 4 is a schematic view of a root section wall thickness measurement result according to the preferred embodiment of the present application; Figure 5 Fig. 5 is a schematic view of a tip section wall thickness measurement result according to the preferred embodiment of the present application; Figure 6 Fig. 6 is a schematic view of the installation table according to the preferred embodiment of the present application; Figure 7 Fig. 7 is a schematic view of the push rod assembly according to the preferred embodiment of the present application; Figure 8 Fig. 8 is a schematic view of the installation of the limiting plate assembly according to the preferred embodiment of the present application; Figure 9 Fig. 9 is a schematic view of the installation of the gear pair assembly according to the preferred embodiment of the present application.

[0051] A blade multi-layer mold shell thickness nondestructive measurement device for clamping a blade wax model 100 and spraying refractory slurry and refractory sand on the blade wax model 100 through a spray gun to form a mold shell on the surface thereof, the blade multi-layer mold shell thickness nondestructive measurement device comprising a reference bar 200, an installation table 1, a spraying box 2, a limiting plate assembly 3, a push rod assembly 4, a gear pair assembly and a motor 5:

[0052] The reference bar 200 is used to be connected at the tenon head riser of the blade wax model 100, a plurality of reference grooves 201 are provided on the reference bar 200 at intervals, the reference grooves 201 are used to paste reference points in the form of stickers, and bearings 202 are provided on the reference bar 200 at intervals;

[0053] The spraying box 2 is arranged beside the mounting table 1, the top of the mounting table 1 is provided with a limiting groove 11, the limiting groove 11 is used for limiting the reference rod 200 and the bearing 202 and enabling the blade wax mold 100 to be rotatably suspended in the spraying box 2, the limiting plate assemblies 3 are arranged on the two sides of the limiting groove 11, the push rod assemblies 4 are arranged on the two sides of the limiting groove 11 in pairs, the limiting plate assemblies 3 on the two sides are connected with the push rod assemblies 4 on the two sides respectively, and the push rod assemblies 4 on the two sides are used for pushing the limiting plate assemblies 3 on the two sides to be closed to clamp and limit the bearing 202 or to be separated to release the limiting of the bearing 202.

[0054] The side wall of the mounting table 1 away from the spraying box 2 is provided with a mounting hole 12, the motor 5 is arranged in the mounting hole 12 and drives the reference rod 200 and the blade wax mold 100 to rotate through a gear pair assembly, and then the blade wax mold 100 in the rotating process is sprayed with refractory slurry and refractory sand through a spray gun.

[0055] In some embodiments, the reference rod 200 can be connected to the blade wax mold 100 by welding.

[0056] The blade multi-layer formwork thickness nondestructive measurement device of the application connects the reference rod 200 to the blade wax mold 100, the reference grooves 201 are arranged on the reference rod 200 at intervals, the reference grooves 201 are used for pasting the reference reference points in the form of stickers, and the reference grooves 201 arranged at intervals are used as reference points for scanning measurement, which is beneficial to improving the accuracy of pasting the reference reference points each time and preventing the reference reference points in the form of stickers from being easily loosened and deviated. Meanwhile, the limiting groove 11 of the mounting table 1 is used for limiting the reference rod 200, and the blade wax mold 100 is suspended in the spraying box 2, the outer rings of the bearings 202 on the reference rod 200 are clamped and limited by the push rod assemblies 4 and the limiting plate assemblies 3, the reference rod 200 and the blade wax mold 100 are rotated by the motor 5 through a gear pair, at this time, the operator sprays the blade wax mold 100 through a spray gun, which reduces the shaking or oscillation of the blade wax mold 100 caused by human holding, effectively ensures the uniformity of the slurry, avoids affecting the solidification sequence of the casting, and ensures the metallurgical quality of the casting.

[0057] Preferably, please refer to Figure 6 , 7 , and 8, the limiting plate assembly 3 comprises a first limiting plate 31 and a second limiting plate 32 arranged at intervals along the length direction of the limiting groove 11, the first limiting plate 31 and the second limiting plate 32 are each provided with two pieces, the two pieces of the first limiting plate 31 are arranged on the two sides of the limiting groove 11 respectively and connected with the push rod assemblies 4 on the two sides respectively, and the two pieces of the second limiting plate 32 are arranged on the two sides of the limiting groove 11 respectively and connected with the push rod assemblies 4 on the two sides respectively.

[0058] Specifically, the push rod assembly 4 comprises a push rod 41, a rotating piece 42 and a support plate 44, the push rod 41 is used to be connected with the first limiting plate 31 and the second limiting plate 32 on one side of the limiting groove 11, the support plate 44 is arranged on the top of the mounting table 1 and is arranged in a spaced manner with the push rod 41, the support plate 44 is provided with a connecting screw hole, the rotating piece 42 is used to be screwed with the connecting screw hole, the first end of the rotating piece 42 is used to be connected with the preset connecting bearing on the push rod 41, the rotating piece 42 is used to drive the push rod 41 to move in translation towards or away from the limiting groove 11 in the process of screwing into or out of the connecting screw hole, thereby driving the two first limiting plates 31 and the second limiting plates 32 to fold or separate to press or release the outer ring of the bearing 202.

[0059] It can be understood that the first limiting plate 31 and the second limiting plate 32 are arranged in pairs, and the paired first limiting plate 31 and the second limiting plate 32 are arranged in a spaced manner along the length direction of the limiting groove 11, and can clamp and limit the bearings 202 arranged in a spaced manner on the reference rod 200. The first limiting plate 31 and the second limiting plate 32 on the same side of the limiting groove 11 are simultaneously connected with the push rod 41, the push rod 41 is connected with the first end of the rotating piece 42 through the connecting bearing, and the rotating piece 42 is arranged on the support plate 44 and connected with the support plate 44 through the screw thread, so that the rotating piece 42 is rotated to drive the push rod 41 to move horizontally and reciprocally, and then the push rod 41 drives the first limiting plate 31 and the second limiting plate 32 on both sides to fold or separate, so as to press or release the outer ring of the bearing 202, and facilitate the disassembly and assembly of the reference rod 200 and the blade wax mold 100.

[0060] It should be noted that the rotating piece 42 is a screw rod, which can be connected with the support plate 44 through the screw thread.

[0061] Alternatively, as shown in Figure 7 , the second end of the rotating piece 42 is provided with a hand wheel 43.

[0062] It can be understood that the operator can conveniently drive the rotating piece 42 to rotate by rotating the hand wheel 43, which can improve the convenience of operation.

[0063] Preferably, as shown in Figure 8 , 9 , the gear pair assembly comprises a driving wheel 6 and a driven wheel 203, the driving wheel 6 is connected with the output shaft of the motor 5, and the driven wheel 203 is arranged at the tail end of the reference rod 200. The driving wheel 6 is used to engage with the driven wheel 203 and drive the driven wheel 203 to rotate.

[0064] It can be understood that the motor 5 drives the driving wheel 6 to rotate, and then drives the driven wheel 203 to rotate, so as to realize the rotation of the reference rod 200 and the blade wax mold 100, facilitate the spraying operation of the spray gun on the blade wax mold 100, and be beneficial to improving the uniformity of the slurry.

[0065] Preferably, referring to Figure 7 As shown in the figure, the bearing 202 is arranged on both sides of the reference rod 200 and avoids the reference groove 201.

[0066] It can be understood that the reference groove 201 is used for pasting the reference point, so as to serve as a measurement reference in the subsequent measurement process, and therefore the bearing 202 needs to be arranged away from the reference groove 201.

[0067] Preferably, referring to Figure 6 As shown in the figure, the top of the spraying box 2 is open, the inside of the spraying box 2 is used for containing clean water, and the bottom of the spraying box 2 is provided with a drain port.

[0068] It can be understood that the spraying box 2 can play a shielding and protecting role in the spraying process, and the residues in the spraying process can fall into the clean water to avoid the residues from condensing in the spraying box 2, thereby reducing the cleaning workload.

[0069] According to another aspect of the present application, a blade multi-layer formwork thickness nondestructive measurement method is also provided, which uses the blade multi-layer formwork thickness nondestructive measurement device, and includes the following steps:

[0070] S100, connecting the reference rod 200 at the tenon head riser of the blade wax mold 100, and pasting the reference point in the reference groove 201;

[0071] S200, scanning the blade wax mold 100 by using a blue light scanner, and obtaining the original wax mold shape size model on the ATOS software;

[0072] S300, wrapping the reference rod 200 by using the adhesive tape;

[0073] S400, spraying the refractory slurry and the refractory sand on the blade wax mold 100 by using the spray gun, and placing and drying the blade wax mold 100 coated with the refractory slurry and the refractory sand;

[0074] S500, removing the adhesive tape wrapped on the reference rod 200, scanning the blade wax mold 100 by using the blue light scanner for the second time, and fitting the second scanning result with the scanning result in the step S200 on the ATOS software through the accurate reference point on the reference rod 200, to obtain a three-dimensional model containing the wax mold shape and a layer of formwork;

[0075] S600, the reference bar 200 is wrapped again with the tape, and the second layer of refractory slurry and refractory sand is sprayed on the blade wax mold 100 by using a spray gun, and is left to stand and dry;

[0076] S700, the tape wrapped on the reference bar 200 is removed, the blade wax mold 100 is scanned for the third time by using a blue light scanner, and the third scanning result is fitted to the first two scanning results on the ATOS software by using the reference points on the reference bar 200, so as to obtain a three-dimensional model containing the wax mold shape, the first layer of mold shells and the second layer of mold shells.

[0077] S800, in this way, a three-dimensional model with a multi-layer mold shell surface is obtained, so as to measure and calculate the thickness of each layer of mold shells at different positions of the blade.

[0078] Preferably, in the steps S300 and S600, when the reference bar 200 is wrapped with the tape, the tape needs to cover and shield the reference points, and the tape does not cover the blade wax mold 100. When the blade wax mold 100 needs to be sprayed, the tape can shield and protect the reference points in the form of stickers, so as to avoid the slurry from being sprayed on the reference points and affecting the subsequent measurement. Alternatively, in the step S800, the three-dimensional model processing software Geomagic is used to obtain the thickness of each layer of mold shells at different positions of the blade. The use of the conventional three-dimensional model processing software is beneficial to expand the adaptability of the method.

[0079] The blade multi-layer mold shell thickness non-destructive measurement method also has the above beneficial effects, and further comprises using a non-contact measurement method, scanning an initial blade model by setting a reference bar 200 on the blade wax mold 100; subsequently, scanning the blade wax mold 100 with the reference bar 200 in the same state after each layer of mold shells is dried, so as to obtain a three-dimensional model with a multi-layer mold shell surface, and finally realize the measurement of the thickness of each layer of mold shells at different positions of the blade. The method does not depend on the skill level of the operator, has a unified reference standard for multiple measurements, is very convenient to operate, and has high measurement accuracy.

[0080] It should be noted that in this document, the terms "comprising", "containing", or any other variant thereof are intended to cover non-exclusive inclusion, so that processes, methods, articles or devices including a series of elements not only include those elements, but also include other elements not explicitly listed, or inherent to such processes, methods, articles or devices.

[0081] The principles and implementations of the present application are described herein with specific examples. The above examples are only used to help understand the method and its core idea of the present application. The above description is only the preferred embodiments of the present application. It should be pointed out that due to the limited nature of the language expression, there are objectively infinite specific structures, and for ordinary skilled persons in the art, without departing from the principles of the present application, a number of improvements, refinements or changes can be made, or the above technical features can be combined in an appropriate manner. The improvements, refinements, changes or combinations, or the application of the inventive concept and technical solution to other fields without improvement, shall be regarded as the protection of the present application.

Claims

1. A non-destructive measurement device for leaf vane multi-layered shell thickness, for clamping a leaf vane wax pattern (100) and spraying refractory slurry and refractory sand on the leaf vane wax pattern (100) by a spray gun to form a shell on its surface, characterized in that, The vane multilayer formwork thickness nondestructive testing device comprises a reference rod (200), a mounting table (1), a spraying box (2), a limiting plate assembly (3), a push rod assembly (4), a gear pair assembly and a motor (5), and a blue light scanner for scanning the vane wax mold (100): The reference rod (200) is used for being connected at the tenon head riser of the vane wax mold (100), a plurality of reference grooves (201) are arranged on the reference rod (200) at intervals, the reference grooves (201) are used for pasting reference points in the form of stickers, and bearings (202) are arranged on the reference rod (200) at intervals; The spraying box (2) is arranged beside the mounting table (1), a limiting groove (11) is formed in the top of the mounting table (1), the limiting groove (11) is used for limiting the reference rod (200) and the bearings (202) and enabling the vane wax mold (100) to be rotatably suspended in the spraying box (2), the limiting plate assembly (3) is arranged on the two sides of the limiting groove (11), the push rod assembly (4) is arranged on the two sides of the limiting groove (11) in pairs, the limiting plate assembly (3) on the two sides is connected with the push rod assembly (4) on the two sides respectively, and the push rod assembly (4) on the two sides is used for driving the limiting plate assembly (3) on the two sides to be closed to clamp and limit the bearings (202) or to be separated to release the limitation on the bearings (202). A mounting hole (12) is formed in the side wall of the side, away from the spraying box (2), of the mounting table (1), the motor (5) is arranged in the mounting hole (12) and drives the reference rod (200) and the vane wax mold (100) to rotate through the gear pair assembly, and then the vane wax mold (100) in the rotating process is sprayed with fire-resistant slurry and fire-resistant sand through a spray gun.

2. A device for non-destructive measurement of the thickness of a blade multi-layer formwork shell according to claim 1, characterized in that, The limiting plate assembly (3) comprises first limiting plates (31) and second limiting plates (32) arranged at intervals along the length direction of the limiting groove (11), each of the first limiting plates (31) and the second limiting plates (32) is provided with two pieces, the two pieces of the first limiting plates (31) are arranged on the two sides of the limiting groove (11) respectively and connected with the push rod assembly (4) on the two sides respectively, and the two pieces of the second limiting plates (32) are arranged on the two sides of the limiting groove (11) respectively and connected with the push rod assembly (4) on the two sides respectively.

3. A device for non-destructive measurement of the thickness of a blade multi-layer formwork shell according to claim 2, characterized in that, The push rod assembly (4) comprises a push rod (41), a rotating piece (42) and a support plate (44), the push rod (41) is used for being connected with the first limiting plate (31) and the second limiting plate (32) on one side of the limiting groove (11) simultaneously, the support plate (44) is arranged on the top of the mounting table (1) and arranged at intervals with the push rod (41), the support plate (44) is provided with a connecting screw hole, the rotating piece (42) is used for being screwed with the connecting screw hole, a first end of the rotating piece (42) is used for being connected with a pre-set connecting bearing on the push rod (41), the rotating piece (42) is used for driving the push rod (41) to perform a translation movement close to or away from the limiting groove (11) in the process of being screwed into or out of the connecting screw hole, and then driving the first limiting plate (31) and the second limiting plate (32) on the two sides to close and press the outer ring of the bearing (202) or to be separated to release the limitation on the bearing (202).

4. A device for non-destructive measurement of the thickness of a blade multi-layer formwork shell according to claim 3, characterized in that A hand wheel (43) is arranged on a second end of the rotating piece (42).

5. A device for non-destructive measurement of the thickness of a blade multi-layer formwork shell according to claim 1, characterized in that, The gear pair assembly comprises a driving wheel (6) and a driven wheel (203), the driving wheel (6) is connected with the output shaft of the motor (5), and the driven wheel (203) is arranged at the tail end of the reference rod (200), and the driving wheel (6) is used for engaging with the driven wheel (203) and driving the driven wheel (203) to rotate.

6. A device for non-destructive measurement of the thickness of a blade multi-layer formwork shell according to claim 1, characterized in that, The bearing (202) is arranged on both sides of the reference rod (200) and avoids the reference groove (201).

7. A device for non-destructive measurement of the thickness of a blade multi-layer formwork shell according to claim 1, characterized in that, The top of the spraying box (2) is open, the inside of the spraying box (2) is used for containing clean water, and the bottom of the spraying box (2) is provided with a drain port.

8. A method for non-destructive measurement of the thickness of a blade multi-layer formwork, characterized in that, The blade multi-layer formwork thickness nondestructive measurement device and the blade multi-layer formwork thickness nondestructive measurement method of any one of claims 1-6 comprise the following steps: S100, connecting the reference rod (200) at the tenon head riser of the blade wax mold (100), and pasting the reference point in the reference groove (201); S200, scanning the blade wax mold (100) by using a blue light scanner, and obtaining an original wax mold shape size model on an ATOS software; S300, wrapping the reference rod (200) with adhesive tape; S400, spraying refractory slurry and refractory sand on the blade wax mold (100) by using a spray gun, and placing and drying the blade wax mold (100) coated with the refractory slurry and the refractory sand; S500, removing the adhesive tape wrapped on the reference rod (200), scanning the blade wax mold (100) for the second time by using a blue light scanner, and fitting the second scanning result to the scanning result in step S200 on the ATOS software through the accurate reference point on the reference rod (200), to obtain a three-dimensional model containing the wax mold shape and the first layer of formwork; S600, wrapping the reference rod (200) with adhesive tape again, spraying the second layer of refractory slurry and refractory sand on the blade wax mold (100) by using a spray gun, and placing and drying; S700, removing the adhesive tape wrapped on the reference rod (200), scanning the blade wax mold (100) for the third time by using a blue light scanner, and fitting the third scanning result to the first two scanning results on the ATOS software through the reference point on the reference rod (200), to obtain a three-dimensional model containing the wax mold shape, the first layer of formwork and the second layer of formwork; S800, and so on, to obtain a three-dimensional model with a multi-layer formwork surface, for measuring and calculating the thickness of each layer of formwork at different positions of the blade.

9. A method of non-destructive measurement of the thickness of a blade multi-layer formwork shell according to claim 8, characterised in that, In steps S300 and S600, when the reference rod (200) is wrapped with adhesive tape, the adhesive tape needs to cover and shield the reference point, and the adhesive tape does not cover the blade wax mold (100).

10. A method of non-destructive measurement of the thickness of a blade multi-layer formwork shell according to claim 8, characterized in that, In step S800, the three-dimensional model processing software Geomagic is used to obtain the thickness of each layer of formwork at different positions of the blade.

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