Curing method and device for detecting internal defects of ceramic matrix composite guide vane product

Abstract

The invention relates to the technical field of nondestructive testing, in particular to a curing method and device for internal defect detection of a ceramic matrix composite guide vane product, and the method comprises the following steps: manufacturing a defect detection die body corresponding to the product; carrying out analogue simulation according to the shape of the inner cavity and the size of the internal defect of the defect detection die body, and determining analogue simulation scanning parameters; carrying out nondestructive testing scanning on the defect detection die body on the basis of the analogue simulation scanning parameters, and determining target scanning parameters; and curing the product internal defect detection method according to the target scanning parameter. The nondestructive testing method for the interior of the cured product can be suitable for products of the same type, so that the defect that the products need to be sectioned in the background is overcome.

Description

Technical Field

[0001] The present invention relates to the technical field of nondestructive testing, and in particular to a curing method and a device for detecting internal defects of a ceramic-based composite material guide vane product. Background Art

[0002] Industrial CT plays an important role in non-destructive testing of aviation materials due to its strong penetrating power, high detection accuracy, and ability to intuitively reflect the internal structural characteristics of the material being tested. This is especially reflected in the wall thickness measurement of turbine blades and defect detection of ceramic-based composite materials.

[0003] Ceramic matrix composites have broad prospects for use in aero-engine applications due to their excellent high temperature performance, lighter weight, and better corrosion resistance. However, the manufacturing process of ceramic matrix composites is long and the internal structure is complex, so defects are prone to occur. In order to ensure quality, non-destructive testing is a key link in the material production process.

[0004] The guide vane made of ceramic matrix composite material has a closed inner cavity structure. In order to verify the accuracy of the non-destructive testing results of the closed inner cavity structure in the prior art, the guide vane needs to be cut and verified, which will make it impossible to repeatedly measure the guide vane for parameter optimization. Therefore, for products with closed inner cavity structures, it has become a technical problem that needs to be solved urgently to design a universal test phantom for non-destructive testing. Summary of the invention

[0005] The object of the present invention is to provide a curing method and device for detecting internal defects of a ceramic-based composite material guide vane product, so as to solve the above-mentioned technical problems.

[0006] To achieve the above object, the present invention provides a curing method for detecting internal defects of a ceramic-based composite material guide vane product, comprising:

[0007] Make defect detection phantoms corresponding to the products;

[0008] Perform simulation based on the inner cavity shape and internal defect size of the defect detection phantom to determine the simulation scanning parameters;

[0009] Perform nondestructive testing on the defect detection phantom based on the simulation scanning parameters to determine the target scanning parameters;

[0010] Solidify the product internal defect detection method according to the target scanning parameters;

[0011] Wherein, the product has a closed inner cavity structure.

[0012] The present invention also provides a curing device for detecting internal defects of a ceramic-based composite material guide vane product, comprising:

[0013] A production unit, used for producing a defect detection phantom corresponding to the product;

[0014] A simulation unit, used to perform simulation according to the inner cavity shape and internal defect size of the defect detection phantom, and determine simulation scanning parameters;

[0015] A scanning unit, used to perform nondestructive testing scanning on the defect detection phantom based on the simulation scanning parameters, and determine the target scanning parameters;

[0016] A curing unit, used to cure the internal defect detection method of the product according to the target scanning parameters;

[0017] Wherein, the product has a closed inner cavity structure.

[0018] Technical effects and advantages of the present invention:

[0019] The present invention provides a method for solidifying internal defect detection of a ceramic-based composite material guide vane product, comprising: making a defect detection phantom corresponding to the product; performing simulation according to the inner cavity shape and internal defect size of the defect detection phantom to determine simulation scanning parameters; performing nondestructive detection scanning on the defect detection phantom based on the simulation scanning parameters to determine target scanning parameters; and solidifying the product internal defect detection method according to the target scanning parameters.

[0020] The method for detecting internal defects of a cured product obtained by the present invention is applicable to any product with a closed inner cavity structure, and the method can be applied to products of the same type, thereby avoiding the disadvantage of needing to section the product in the background.

[0021] Other features and advantages of the present invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A solidification method for detecting internal defects of ceramic-based composite guide vane products. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] It should be noted that the structures, proportions, sizes, etc. shown in the drawings of this specification are only used to match the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the implementation conditions of the present invention. Therefore, they do not have substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear narration and are not used to limit the scope of implementation of the present invention. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope of implementation of the present invention.

[0025] To better understand this solution, a simple introduction to this solution is as follows: By pre-setting a series of defect morphological features with standard sizes in an open inner cavity, and then closing the inner cavity, a measured mold body corresponding to the product is made; according to the size of the outer shape of the inner cavity of the mold body, a simulation of industrial CT detection is carried out to obtain the simulation detection result of the outer shape of the inner cavity of the mold body; by comparing the difference between the simulation detection result and the model, the scanning parameters of the industrial CT system in the simulation are adjusted to optimize the detection accuracy of the defect, and the theoretically optimal scanning parameters (i.e., simulation scanning parameters) are obtained; based on the actual industrial CT detection system, using the theoretically optimal scanning parameters as the initial value to scan the mold body with preset defects, comparing the deviation between the scanning result and the preset size, finely adjusting and optimizing again the scanning detection parameters of the industrial CT system to determine the final scanning detection parameters (i.e., target scanning parameters), and thus obtaining a method for non-destructive detection of internal defects of products.

[0026] The method for non-destructive detection of the interior of the product of the present invention is applicable to any product with a closed inner cavity structure. Moreover, the non-destructive detection model for the interior of this product can be applied to products of the same type, thus avoiding the drawback in the background that the size of internal defects cannot be calibrated and the product needs to be sectioned for verification. By pre-optimizing the detection parameters through the method of simulation calculation, the process optimization time is saved and the detection efficiency is improved. This method is applicable to any product with a closed inner cavity. For the sake of simplicity in the following description, a ceramic matrix composite guide vane is taken as an example.

[0027] To solve the deficiencies of the prior art, the present invention discloses a curing method for detecting internal defects of a ceramic matrix composite guide vane product, as Figure 1 shown, this method includes:

[0028] 1. Making a defect detection mold body corresponding to the product.

[0029] Specifically, it includes: cutting the product into a laminated structure specimen, and the inner cavity of the laminated structure specimen is communicated with the outer surface; setting defects on the inner wall of the inner cavity of the laminated structure specimen and then closing the inner cavity by bonding to obtain a mold body.

[0030] Among them, the thickness of the laminations in the laminated structure specimen is 1-2 cm.

[0031] Among them, setting defects on the inner wall of the inner cavity of the laminated structure specimen includes: making holes with different depths at different positions on the inner wall of the inner cavity of the laminated structure specimen by laser, and pasting defective sample blocks for characterizing cracks or inclusions on the inner wall of the inner cavity of the laminated structure specimen (specifically: the crack or inclusion defects are real defects containing cracks and inclusions detected in parts by industrial CT, obtaining small-sized specimen blocks by cutting the local area containing defects, and then setting them in the inner cavity by pasting).

[0032] Among them, the size of the hole defects is 0.2-1 mm, and the depth of the hole defects is 0.5 mm to complete penetration.

[0033] 2. Perform simulation according to the inner cavity shape and internal defect size of the defect detection mold body to determine the simulation scanning parameters.

[0034] Specifically: determine the inner cavity shape and internal defect size of the defect detection mold body according to the defect detection mold body; perform simulation of industrial CT detection according to the inner cavity shape and internal defect size of the defect detection mold body to obtain the simulation results of the inner cavity of the defect detection mold body under different scanning parameters; optimize the scanning parameters according to the error between the inner cavity shape and internal defect size of the defect detection mold body and the simulation results to obtain the optimized simulation scanning parameters.

[0035] Among them, the simulation calculation uses ray imaging simulation software based on the Monte Carlo method.

[0036] Among them, obtaining the outer dimension of the inner cavity of the mold body includes: measuring the size of the inner cavity of the mold body by a coordinate measuring instrument to obtain the size of the outer shape of the inner cavity of the mold body and the size inside the inner cavity of the mold body. Since the internal defect size of the inner cavity of the mold body is prefabricated, the size can be obtained during prefabrication.

[0037] Among them, obtaining the optimal scanning parameters as the scanning parameters with the smallest deviation between the simulation measurement results and the preset values includes: ray energy, filter, and magnification ratio. Specifically, the adjustment range of the ray energy is 50-250 kV, the adjustment range of the filter is 0.1-1.5 mmCu, and the adjustment range of the magnification ratio is 1-20.

[0038] 3. Perform non-destructive testing scans on the defect detection phantom based on the simulation scanning parameters to determine the target scanning parameters.

[0039] Specifically, it includes: using an industrial CT system with the simulation scanning parameters as the initial values to scan the defect detection phantom, and obtaining the non-destructive scanning results of the inner cavity shape and internal defect size of the defect detection phantom; optimizing the scanning parameters according to the error between the inner cavity shape and internal defect size of the defect detection phantom and the non-destructive scanning results to obtain the target scanning parameters.

[0040] 4. Solidify the internal defect detection method of the product according to the target scanning parameters.

[0041] It should also be noted that the product is preferably a guide vane prepared from a ceramic matrix composite material.

[0042] The present invention also provides a solidification device for detecting internal defects of a ceramic matrix composite guide vane product, including:

[0043] A production unit for producing a defect detection phantom corresponding to the product;

[0044] A simulation unit for performing simulation according to the inner cavity shape and internal defect size of the defect detection phantom to determine the simulation scanning parameters;

[0045] A scanning unit for performing non-destructive testing scans on the defect detection phantom based on the simulation scanning parameters to determine the target scanning parameters;

[0046] A solidification unit for solidifying the internal defect detection method of the product according to the target scanning parameters.

[0047] Since the content protected by this device corresponds to the above method, it will not be introduced in detail here. For detailed content, please refer to the detailed description of the method.

[0048] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A curing method for detecting internal defects of a ceramic matrix composite guide vane product, characterized in that, Comprising: Fabricating a defect detection phantom corresponding to the product; Performing simulation based on the inner cavity shape and internal defect size of the defect detection phantom to determine the simulation scanning parameters; Performing non-destructive testing scanning on the defect detection phantom based on the simulation scanning parameters to determine the target scanning parameters; Solidifying the internal defect detection method of the product according to the target scanning parameters; Wherein, the product has a closed inner cavity structure.

2. The method according to claim 1, wherein Fabricating the defect detection phantom, including: Cutting the target product into a layer structure specimen to obtain an open inner cavity phantom; After setting defects in the open inner cavity of the open inner cavity phantom, re-sealing the inner cavity by bonding to obtain the defect detection phantom.

3. The method according to claim 2, wherein The layer thickness in the layer structure specimen is 1 - 2 cm.

4. The method according to claim 2, wherein Setting defects in the open inner cavity of the open inner cavity phantom, including: making hole defects with different depths at different positions on the inner wall of the inner cavity of the layer structure specimen by laser, and pasting defective sample blocks for characterizing cracks or inclusions on the inner wall of the inner cavity of the layer structure specimen.

5. The method according to claim 4, wherein The size of the hole defects is 0.2 - 1 mm, and the depth of the hole defects is 0.5 mm to completely penetrate the inner cavity of the layer structure specimen.

6. The method according to claim 1, wherein Determining the simulation scanning parameters, including: Determining the inner cavity shape and internal defect size of the defect detection phantom according to the defect detection phantom; Performing simulation of industrial CT detection according to the inner cavity shape and internal defect size of the defect detection phantom to obtain the simulation results of the inner cavity of the defect detection phantom under different scanning parameters; Optimizing the scanning parameters according to the error between the inner cavity shape and internal defect size of the defect detection phantom and the simulation results to obtain the simulation scanning parameters.

7. The method according to claim 6, wherein Measuring the size of the inner cavity of the defect detection phantom by a coordinate measuring instrument to obtain the outer dimension of the inner cavity of the defect detection phantom.

8. The method according to claim 6, characterized in that, The simulation scanning parameters include: a ray energy ranging from 50 - 250 kV, a copper filter with a thickness of 0.1 - 1.5 mm, and a magnification ratio ranging from 1 - 20.

9. The method according to claim 6, wherein Determining the target scanning parameters, including: Scanning the defect detection phantom using an industrial CT system with the simulation scanning parameters as the initial value to obtain the non-destructive scanning results of the inner cavity shape and internal defect size of the defect detection phantom; Optimizing the scanning parameters according to the error between the inner cavity shape and internal defect size of the defect detection phantom and the non-destructive scanning results to obtain the target scanning parameters.

10. A curing device for detecting internal defects of a ceramic matrix composite vane product, characterized in that, Comprising: A fabricating unit for fabricating a defect detection phantom corresponding to the product; A simulation unit for performing simulation based on the inner cavity shape and internal defect size of the defect detection phantom to determine the simulation scanning parameters; A scanning unit for performing non-destructive testing scanning on the defect detection phantom based on the simulation scanning parameters to determine the target scanning parameters; A solidifying unit for solidifying the internal defect detection method of the product according to the target scanning parameters; Wherein, the product has a closed inner cavity structure.

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