Composite material fan blade partition determination method and device and electronic equipment

Abstract

The invention relates to a composite material fan blade partition determination method and device and electronic equipment, and the method comprises the steps that a standard composite material fan blade is obtained, the defect rate of the standard composite material fan blade is smaller than a defect rate threshold value, and the porosity of the standard composite material fan blade is smaller than a porosity threshold value; determining a partition interval value of the standard composite material fan blade and an ultrasonic scanning result of the standard composite material fan blade; based on the ultrasonic scanning result and the partition interval value, the standard composite material fan blade is subjected to region division, and the standard composite material fan blade subjected to region division is obtained; and according to the partition boundaries of all the areas in the standard composite material fan blade obtained after area division, area division is conducted on the to-be-treated composite material fan blade. The fan blades are reasonably partitioned, so that the problems of missing detection and misjudgment in the ultrasonic detection process of the whole blades can be avoided.

Description

Technical Field

[0001] The present disclosure relates to the technical field of aeroengines, and particularly to a method, an apparatus, and an electronic device for determining partitions of a composite fan blade. Background Art

[0002] Composite materials, such as carbon fiber resin matrix composite materials, have been widely used in cold-end components in the field of aeroengines due to their significant weight reduction advantages. In recent years, with the improvement of structural design and manufacturing levels, composite materials have been tried in rotor parts such as fan blades under more severe working conditions. Considering the characteristics of high quality, high reliability, long life, and high performance of aviation products, it is required that composite materials must be subjected to 100% non-destructive testing with high accuracy and reliability. Currently, ultrasonic testing is a commonly used method for detecting defects such as delamination, porosity, and porosity in composite material structures.

[0003] However, fan blades have characteristics such as large size, large curvature change, large thickness change, and non-parallel local structural surfaces. At the same time, the allowable defect size is more stringent than that of structural components. Currently, ultrasonic testing of the entire blade is often carried out with the same detection sensitivity and evaluation gate, which will lead to inaccurate evaluation. Summary of the Invention

[0004] To overcome the problems in the related art, the present disclosure provides a method, an apparatus, and an electronic device for determining partitions of a composite fan blade.

[0005] According to a first aspect of an embodiment of the present disclosure, a method for determining partitions of a composite fan blade is provided. The method includes: obtaining a standard composite fan blade, where the defect rate of the standard composite fan blade is less than a defect rate threshold, and the porosity of the standard composite fan blade is less than a porosity threshold; determining an interval value for partitioning the standard composite fan blade and an ultrasonic scanning result of the standard composite fan blade; based on the ultrasonic scanning result and the interval value, partitioning the standard composite fan blade to obtain a standard composite fan blade after region partitioning; and partitioning a composite fan blade to be processed according to the partition boundaries of each region in the standard composite fan blade after region partitioning.

[0006] According to the method for determining the partition of a composite fan blade provided by the present disclosure, the partition interval value includes a first partition interval value of the body region of the standard composite fan blade and a second partition interval value of the edge region of the standard composite fan blade; based on the ultrasonic scanning result and the partition interval value, performing region division on the standard composite fan blade to obtain the standard composite fan blade after region division, including: based on the ultrasonic scanning result and the first partition interval value, performing region division on the body region of the standard composite fan blade to obtain the body region after region division; based on the ultrasonic scanning result and the second partition interval value, performing region division on the edge region of the standard composite fan blade to obtain the edge region after region division; based on the body region after region division and the edge region after region division, obtaining the standard composite fan blade after region division.

[0007] According to the method for determining the partition of a composite fan blade provided by the present disclosure, the first partition interval value includes a first ultrasonic penetration energy attenuation interval value. When the ultrasonic scanning result is an ultrasonic penetration C-scan result obtained by scanning based on the ultrasonic penetration method, based on the ultrasonic scanning result and the first partition interval value, performing region division on the body region of the standard composite fan blade to obtain the body region after region division, including: based on the ultrasonic penetration C-scan result, obtaining the first ultrasonic penetration C-scan result of the body region; using the root of the tenon of the body region as the initial end of the partition and the tip of the blade of the body region as the termination end of the partition, and according to the penetration energy values of each point of the body region recorded in the first ultrasonic penetration C-scan result, performing region division on the body region at intervals of the first ultrasonic penetration energy attenuation interval value until the entire body region is divided, obtaining the body region after region division.

[0008] According to the method for determining the partition of the composite material fan blade provided by the present disclosure, the second interval value includes a second ultrasonic penetration energy attenuation interval value. When the ultrasonic scan result is an ultrasonic penetration C-scan result obtained by scanning based on the ultrasonic penetration method, based on the ultrasonic scan result and the second interval value, the edging area of the standard composite material fan blade is partitioned to obtain the partitioned edging area, including: obtaining the second ultrasonic penetration C-scan result of the edging area based on the ultrasonic penetration C-scan result; using one end of the edging area close to the root of the tenon as the initial end of the partition, and using the tip of the blade of the edging area as the termination end of the partition, and partitioning the edging area at intervals of the second ultrasonic penetration energy attenuation interval value according to the penetration energy values of the points in the edging area recorded in the second ultrasonic penetration C-scan result until the entire edging area is partitioned, thereby obtaining the partitioned edging area.

[0009] According to the method for determining the partition of the composite material fan blade provided by the present disclosure, the first interval value includes a first ultrasonic reflection bottom echo gain interval value, and the body area includes the body area on the suction side. When the ultrasonic scan result is an ultrasonic reflection scan result obtained by scanning based on the ultrasonic reflection method, based on the ultrasonic scan result and the first interval value, the body area of the standard composite material fan blade is partitioned to obtain the partitioned body area, including: obtaining a first bottom echo partition value based on the first ultrasonic reflection bottom echo gain interval value; obtaining the first ultrasonic reflection scan result of the body area on the suction side based on the ultrasonic reflection scan result; using the tip of the blade of the body area on the suction side as the initial end of the partition, and using the root of the tenon of the body area on the suction side as the termination end of the partition. When the bottom echo displayed on the oscilloscope is adjusted to a preset multiple of the full screen height, partitioning the body area on the suction side every time the bottom echo energy value is monitored to decrease to the first bottom echo partition value according to the bottom echo energy values of the points in the body area on the suction side recorded in the first ultrasonic reflection scan result until the entire body area on the suction side is partitioned, thereby obtaining the partitioned body area on the suction side.

[0010] According to the method for determining the partition of a composite material fan blade provided by the present disclosure, the second interval value includes the second ultrasonic reflection bottom surface echo gain interval value, and the edge wrapping region includes the blade suction side edge wrapping region. When the ultrasonic scan result is an ultrasonic reflection scan result obtained by ultrasonic reflection method, based on the ultrasonic scan result and the second interval value, the edge wrapping region of the standard composite material fan blade is partitioned to obtain the edge wrapping region after partition, including: obtaining a second bottom surface echo partition value based on the second ultrasonic reflection bottom surface echo gain interval value; obtaining a second ultrasonic reflection scan result of the blade suction side edge wrapping region based on the ultrasonic reflection scan result; using the tip of the blade suction side edge wrapping region as the initial end of the partition and the root of the tenon of the blade suction side edge wrapping region as the termination end of the partition. When the bottom surface echo displayed on the oscilloscope is adjusted to a preset multiple of the full screen height, according to the bottom surface echo energy values of each point in the blade suction side edge wrapping region recorded by the second ultrasonic reflection scan result, every time the bottom surface echo energy value is monitored to decrease to the second bottom surface echo partition value, the blade suction side edge wrapping region is partitioned until the entire blade suction side edge wrapping region is partitioned, and the blade suction side edge wrapping region after partition is obtained.

[0011] According to the method for determining the partition of a composite material fan blade provided by the present disclosure, the first interval value includes the first ultrasonic reflection bottom surface echo gain interval value, and the body region includes the blade pressure side body region. When the ultrasonic scan result is an ultrasonic reflection scan result obtained by ultrasonic reflection method, based on the ultrasonic scan result and the first interval value, the body region of the standard composite material fan blade is partitioned to obtain the body region after partition, including: obtaining a first bottom surface echo partition value based on the first ultrasonic reflection bottom surface echo gain interval value; obtaining a third ultrasonic reflection scan result of the blade pressure side body region based on the ultrasonic reflection scan result; using the tip of the blade pressure side body region as the initial end of the partition and the root of the tenon of the blade pressure side body region as the termination end of the partition. When the bottom surface echo displayed on the oscilloscope is adjusted to a preset multiple of the full screen height, according to the bottom surface echo energy values of each point in the blade pressure side body region recorded by the third ultrasonic reflection scan result, every time the bottom surface echo energy value is monitored to decrease to the first bottom surface echo partition value, the blade pressure side body region is partitioned until the entire blade pressure side body region is partitioned, and the blade pressure side body region after partition is obtained.

[0012] According to the method for determining the partition of a composite material fan blade provided by the present disclosure, the second interval value includes a second ultrasonic reflection bottom surface echo gain interval value, and the edge region includes a leading edge side edge region. When the ultrasonic scan result is an ultrasonic reflection scan result obtained by ultrasonic reflection method, based on the ultrasonic scan result and the second interval value, the edge region of the standard composite material fan blade is partitioned to obtain the edge region after partition, including: obtaining a second bottom surface echo partition value based on the second ultrasonic reflection bottom surface echo gain interval value; obtaining a fourth ultrasonic reflection scan result of the leading edge side edge region based on the ultrasonic reflection scan result; using the tip of the leading edge side edge region as the initial end of the partition and the root of the tenon of the leading edge side edge region as the termination end of the partition. When the bottom surface echo displayed on the oscilloscope is adjusted to a preset multiple of the full screen height, according to the bottom surface echo energy values of each point of the leading edge side edge region recorded in the fourth ultrasonic reflection scan result, each time the bottom surface echo energy value is monitored to decrease to the second bottom surface echo partition value, the leading edge side edge region is partitioned until the entire leading edge side edge region is partitioned to obtain the leading edge side edge region after partition.

[0013] According to the second aspect of the embodiments of the present disclosure, there is provided a device for determining the partition of a composite material fan blade, the device including: an acquisition module for acquiring a standard composite material fan blade, wherein the defect rate of the standard composite material fan blade is less than a defect rate threshold, and the porosity of the standard composite material fan blade is less than a porosity threshold; a determination module for determining the interval value of the standard composite material fan blade and the ultrasonic scan result of the standard composite material fan blade; a partitioning module for partitioning the standard composite material fan blade based on the ultrasonic scan result and the interval value to obtain the standard composite material fan blade after partition; and a processing module for partitioning the composite material fan blade to be processed according to the partition boundaries of each region in the standard composite material fan blade after partition.

[0014] According to the third aspect of the embodiments of the present disclosure, there is provided an electronic device including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, the method for determining the partition of a composite material fan blade as described above is implemented.

[0015] According to the fourth aspect of the embodiments of the present disclosure, there is provided a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the method for determining the partition of a composite material fan blade according to any one of the embodiments of the first aspect is implemented.

[0016] The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects: obtaining a standard composite material fan blade, determining the interval value of the standard composite material fan blade, and the ultrasonic scanning result of the standard composite material fan blade, and based on the ultrasonic scanning result and the interval value, dividing the standard composite material fan blade into regions to obtain the standard composite material fan blade after region division; then dividing the to-be-processed composite material fan blade according to the division boundaries of each region in the standard composite material fan blade after region division. By combining the actual structural characteristics of the fan blade, reasonable partitioning of the fan blade is achieved, thereby avoiding the problems of missed detection and misjudgment during the ultrasonic detection of the entire blade.

[0017] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present disclosure, and are used together with the specification to explain the principles of the present disclosure.

[0019] Figure 1 is a flowchart of a method for determining the partition of a composite material fan blade shown according to an exemplary embodiment.

[0020] Figure 2 is one of the schematic diagrams of dividing the body region of a standard composite material fan blade based on the ultrasonic scanning result and the first interval value according to an exemplary embodiment.

[0021] Figure 3 is a schematic diagram of the partition of the composite material body by the ultrasonic detection penetration method shown according to an exemplary embodiment.

[0022] Figure 4 is one of the schematic diagrams of dividing the edge region of a standard composite material fan blade based on the ultrasonic scanning result and the second interval value according to an exemplary embodiment.

[0023] Figure 5 is a second schematic diagram of dividing the body region of a standard composite material fan blade based on the ultrasonic scanning result and the first interval value according to an exemplary embodiment.

[0024] Figure 6 is a schematic diagram of the partition of the composite material body on the leaf basin side by the ultrasonic detection reflection method shown according to an exemplary embodiment.

[0025] Figure 7It is the second schematic diagram of dividing the edge region of a standard composite fan blade based on ultrasonic scanning results and a second sub-region interval value.

[0026] Figure 8 It is a block diagram of determining the partition of a composite fan blade shown according to an exemplary embodiment.

[0027] Figure 9 It is a schematic structural diagram of an electronic device shown according to an exemplary embodiment. Detailed implementation manners

[0028] The following will describe the detailed implementation manners of the present disclosure. It should be noted that in the process of the specific description of these implementation manners, for the sake of concise description, it is impossible for this specification to describe all features of the actual implementation manners in detail. It should be understood that in the actual implementation process of any implementation manner, just as in the process of any engineering project or design project, in order to achieve the specific goals of the developer and to meet system-related or business-related restrictions, various specific decisions are often made, and this will also change from one implementation manner to another. In addition, it should also be understood that although the efforts made in this development process may be complex and lengthy, for those of ordinary skill in the art related to the content disclosed in the present disclosure, some design, manufacturing or production changes made on the basis of the technical content disclosed in the present disclosure are only conventional technical means and should not be understood as the content of the present disclosure being insufficient.

[0029] Unless otherwise defined, the technical terms or scientific terms used in the claims and the specification should have the ordinary meaning understood by those of ordinary skill in the technical field to which the present disclosure belongs. The "first", "second" and similar terms used in the specification and claims of the present patent application do not indicate any order, quantity or importance, but are only used to distinguish different components. The terms such as "a" or "one" do not indicate a quantity limitation, but indicate that there is at least one. The terms such as "comprising" or "including" are intended to mean that the elements or items appearing before "comprising" or "including" cover the elements or items listed after "comprising" or "including" and their equivalent elements, and do not exclude other elements or items. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, nor are they limited to direct or indirect connections.

[0030] For composite fan blades with complex external structures, ultrasonic inspection of the entire blade is currently carried out using the same detection sensitivity and evaluation gate, resulting in inaccurate evaluation. To avoid missed detections and misjudgments as much as possible, this disclosure needs to establish a scientific zoning scheme for ultrasonic inspection and defect evaluation in combination with the actual characteristics of the fan blades.

[0031] Figure 1 It is a flowchart of a method for determining the zoning of a composite fan blade shown according to an exemplary embodiment.

[0032] The following will be combined with Figure 1 to illustrate the process of a method for determining the zoning of a composite fan blade provided by this disclosure.

[0033] In an exemplary embodiment of this disclosure, combined with Figure 1 it can be known that a method for determining the zoning of a composite fan blade may include steps 110 to 140, and each step will be introduced separately below.

[0034] In step 110, a standard composite fan blade is obtained.

[0035] It can be understood that the standard composite fan blade is a fan blade that meets the preset requirements. For example, the defect rate of the standard composite fan blade is less than the defect rate threshold, and the porosity of the standard composite fan blade is less than the porosity threshold. Among them, the defect rate threshold can be infinitely close to 0, and the porosity threshold can also be infinitely close to 0.

[0036] In another embodiment, the standard composite fan blade can be obtained in the following way:

[0037] (1) A batch of fan blades can be prepared using the optimal manufacturing process for composite fan blades, and non-defective blades can be selected through methods such as ultrasonic inspection, radiography, and CT.

[0038] (2) Use the immersion ultrasonic inspection penetration method and cooperate with the fan blade numerical simulation profiling program to scan this batch of non-defective blades; according to the ultrasonic attenuation ratio comparison of areas such as the tenon, root extension, blade body, and edge wrapping of the fan blade, select the one with the best internal quality, that is, the blade with the smallest and most uniform ultrasonic attenuation, as the optimal blade (corresponding to the standard composite fan blade); anatomically verify that the blade with sub-optimal quality has no defects and zero porosity throughout the blade; if zero porosity cannot be guaranteed, repeat the first step, and if zero porosity still cannot be guaranteed, select the blade with the smallest attenuation and best quality, that is, obtain the standard composite fan blade.

[0039] In this embodiment, by selecting the standard composite fan blade with the best performance, the smallest and most uniform ultrasonic attenuation, a more reliable and standard zoning sample is established for subsequent processing, laying a foundation for reasonable zoning of the composite fan blade to be processed.

[0040] In step 120, determine the interval value between sections of the standard composite fan blade and the ultrasonic scanning result of the standard composite fan blade.

[0041] In one embodiment, the interval value between sections of the standard composite fan blade and the ultrasonic scanning result can be determined. It should be noted that under different ultrasonic detection conditions, the corresponding interval value between sections can be different, and the ultrasonic scanning result is also different. In one example, when the ultrasonic detection is performed based on the ultrasonic penetration method, the interval value between sections is the interval value corresponding to the detection based on the ultrasonic penetration method; the ultrasonic scanning result is the ultrasonic penetration C-scan result obtained by scanning based on the ultrasonic penetration method.

[0042] In another example, when the ultrasonic detection is performed based on the ultrasonic reflection method, the interval value between sections is the interval value corresponding to the detection based on the ultrasonic reflection method; the ultrasonic scanning result is the ultrasonic reflection scanning result obtained by scanning based on the ultrasonic reflection method.

[0043] In step 130, based on the ultrasonic scanning result and the interval value between sections, perform regional division on the standard composite fan blade to obtain the standard composite fan blade after regional division.

[0044] In step 140, perform regional division on the composite fan blade to be processed according to the sectional boundaries of each region in the standard composite fan blade after regional division.

[0045] In another embodiment, in order to consider the complex outer shape structure of the composite fan blade, based on the ultrasonic scanning result and the interval value between sections, perform regional division on the standard composite fan blade to obtain the standard composite fan blade after regional division. And perform regional division on the composite fan blade to be processed according to the sectional boundaries of each region in the standard composite fan blade after regional division. The reasonable regional division of the fan blade is realized, thereby avoiding the problems of missed detection and misjudgment during the ultrasonic detection of the entire blade.

[0046] The method for determining the partition of the composite material fan blade provided by the present disclosure obtains a standard composite material fan blade, determines the partition interval value of the standard composite material fan blade, and the ultrasonic scanning result of the standard composite material fan blade, and based on the ultrasonic scanning result and the partition interval value, divides the standard composite material fan blade into regions to obtain the standard composite material fan blade after region division; then, according to the partition boundaries of each region in the standard composite material fan blade after region division, the composite material fan blade to be processed is divided into regions. By combining the actual structural characteristics of the fan blade, a reasonable partition of the fan blade is realized, so that the problems of missed detection and misjudgment during the ultrasonic detection of the whole blade can be avoided.

[0047] In another exemplary embodiment of the present disclosure, the partition interval value may include a first partition interval value of the body region of the standard composite material fan blade and a second partition interval value of the edge region of the standard composite material fan blade. Continuing with the example of the embodiment described above Figure 1 for illustration, among them, based on the ultrasonic scanning result and the partition interval value, dividing the standard composite material fan blade into regions to obtain the standard composite material fan blade after region division (corresponding to step 130) can be implemented in the following manner:

[0048] Based on the ultrasonic scanning result and the first partition interval value, divide the body region of the standard composite material fan blade into regions to obtain the body region after region division;

[0049] Based on the ultrasonic scanning result and the second partition interval value, divide the edge region of the standard composite material fan blade into regions to obtain the edge region after region division;

[0050] Based on the body region after region division and the edge region after region division, obtain the standard composite material fan blade after region division.

[0051] In one embodiment, in order to reasonably partition the standard composite material fan blade, different partition interval values are defined according to different types of regions. Among them, the partition interval value of the body region can be defined as the first partition interval value, and the partition interval value of the edge region can be defined as the second partition interval value.

[0052] During application, based on the ultrasonic scanning result and the first partition interval value, the body region of the standard composite material fan blade can be divided into regions to obtain the body region after region division; based on the ultrasonic scanning result and the second partition interval value, the edge region of the standard composite material fan blade can be divided into regions to obtain the edge region after region division; then, based on the combination of the body region after region division and the edge region after region division, the standard composite material fan blade after region division can be obtained.

[0053] To ensure the accuracy of partitioning, different ultrasonic scans adopt different methods. For example, different partitioning methods are used for the transmission method or the reflection method. Below, the partitioning method for scanning by the ultrasonic transmission method will be described in conjunction with Figure 2 the partitioning method for the ultrasonic transmission method.

[0054] Figure 2 is one of the schematic diagrams for partitioning the body area of a standard composite fan blade based on ultrasonic scan results and a first interval value between partitions.

[0055] In an exemplary embodiment of the present disclosure, the first interval value between partitions may include a first ultrasonic transmission energy attenuation interval value. It can be understood that the first ultrasonic transmission energy attenuation interval value is the interval value between partitions of the body area corresponding to the case of scanning based on the ultrasonic transmission method. When the ultrasonic scan result is the ultrasonic transmission C-scan result obtained by scanning based on the ultrasonic transmission method, in conjunction with Figure 2 it can be known that based on the ultrasonic scan result and the first interval value between partitions, the body area of the standard composite fan blade is partitioned, and the body area after partitioning may include step 210 and step 220. Each step will be introduced separately below.

[0056] In step 210, based on the ultrasonic transmission C-scan result, the first ultrasonic transmission C-scan result of the body area is obtained;

[0057] In step 220, taking the root of the tenon of the body area as the initial end of partitioning and the tip of the blade of the body area as the termination end of partitioning, according to the penetration energy values of each point of the body area recorded in the first ultrasonic transmission C-scan result, the body area is partitioned every first ultrasonic transmission energy attenuation interval value until the entire body area is partitioned, and the body area after partitioning is obtained.

[0058] In one embodiment, a fine scanning method may be adopted to obtain the full-sensitivity range recorded ultrasonic transmission C-scan result of the standard composite fan blade, and the first ultrasonic transmission C-scan result of the body area is obtained based on this ultrasonic transmission C-scan result.

[0059] In another example, the ultrasonic transmission method evaluation threshold α of the body area may be determined, and the first ultrasonic transmission energy attenuation interval value is obtained based on the ultrasonic transmission method evaluation threshold α. In one example, the first ultrasonic transmission energy attenuation interval value Δ1 can be expressed as where δ1 is a set value, and the larger δ1 is, the larger the partitioning range is.

[0060] In yet another embodiment, during the process of partitioning the first ultrasonic through-transmission C-scan result of the composite material body region of a standard composite material fan blade, the root of the tenon of the body region can be used as the initial end of the partition. Let the through-transmission received energy value at this point be γ0. Then, the region where the received energy is in the range of γ0 to γ0 + Δ1 is the composite material body zone 1, denoted as zone I (body); the region where the received energy value is in the range of γ0 + Δ1 to γ0 + 2Δ1 is the composite material body zone 2, denoted as zone II (body); and so on until the tip part is completely partitioned, thus obtaining the body region after regional partitioning. Among them, Figure 3 The schematic diagram of the partition of the composite material body by the ultrasonic through-transmission method is shown. In this embodiment, through the personalized partitioning of the composite material body region, it is possible to combine the actual structural characteristics of the fan blade, achieve a reasonable partitioning of the fan blade, and thus avoid the problems of missed detection and misjudgment during the ultrasonic inspection of the entire blade.

[0061] Figure 4 FIG. is one of the schematic diagrams of partitioning the edge region of a standard composite material fan blade based on the ultrasonic scan result and the second interval value between partitions.

[0062] The following will be combined with Figure 4 The method for partitioning the edge region scanned by the ultrasonic through-transmission method will be described.

[0063] In yet another exemplary embodiment of the present disclosure, the second interval value between partitions may include the second ultrasonic through-transmission energy attenuation interval value. It can be understood that the second ultrasonic through-transmission energy attenuation interval value is the interval value between partitions of the edge region corresponding to the case of scanning based on the ultrasonic through-transmission method. When the ultrasonic scan result is the ultrasonic through-transmission C-scan result obtained by scanning based on the ultrasonic through-transmission method, combined with Figure 4 it can be known that based on the ultrasonic scan result and the second interval value between partitions, partitioning the edge region of a standard composite material fan blade to obtain the edge region after regional partitioning may include step 410 and step 420. The following will introduce each step separately:

[0064] In step 410, based on the ultrasonic through-transmission C-scan result, obtain the second ultrasonic through-transmission C-scan result of the edge region;

[0065] In step 420, with one end of the edge region close to the root of the tenon as the initial end of the partition and the tip of the edge region as the termination end of the partition, according to the through-transmission energy values of each point in the edge region recorded in the second ultrasonic through-transmission C-scan result, partition the edge region at intervals of the second ultrasonic through-transmission energy attenuation interval value until the entire edge region is completely partitioned, obtaining the edge region after regional partitioning.

[0066] In one embodiment, a fine scanning method can be adopted to obtain the full-sensitivity range record of the ultrasonic penetration C-scan result of the standard composite fan blade, and the second ultrasonic penetration C-scan result of the edge region can be obtained based on the ultrasonic penetration C-scan result.

[0067] In another embodiment, the evaluation threshold β of the ultrasonic penetration method for the edge region can be determined, and the second ultrasonic penetration energy attenuation interval value can be obtained based on the evaluation threshold β of the ultrasonic penetration method. In one example, the second ultrasonic penetration energy attenuation interval value Δ2 can be expressed as where δ2 is a set value, and the larger δ2 is, the larger the partition range is.

[0068] In another embodiment, during the process of dividing the second ultrasonic penetration C-scan result of the composite edge region of the standard composite fan blade, the lowest point of the edge, that is, the point closest to the root of the tenon, can be used as the initial point. Let the penetration received energy value at this point be ε0. Then, the region with the received energy in the range of ε0 to ε0 + Δ2 is the edge region 1, denoted as region I (edge); the region with the received energy value in the range of ε0 + Δ2 to ε0 + 2Δ2 is the edge region 2, denoted as region II (edge); and so on until the tip part is divided completely, thus obtaining the edge region after region division. In this embodiment, through the personalized partitioning of the composite edge region, it is possible to combine the actual structural characteristics of the fan blade, realize the reasonable partitioning of the fan blade, and thus avoid the problems of missed detection and misjudgment during the ultrasonic detection of the entire blade.

[0069] It should be noted that when different ultrasonic scanning methods are adopted, the partitioning definition methods for the blade are also different. During the partitioning process of the body region on the suction side based on the reflection method, the body region on the suction side, the edge region on the suction side, the body region on the pressure side, and the edge region on the pressure side are involved.

[0070] Figure 5 FIG. 2 is a second schematic diagram of partitioning the body region of a standard composite fan blade based on ultrasonic scanning results and a first partition attenuation interval value according to an exemplary embodiment.

[0071] The following will be combined with Figure 5 The partitioning process of the body region on the suction side based on the reflection method will be described.

[0072] In an exemplary embodiment of the present disclosure, the first partition interval value can include the first ultrasonic reflection bottom surface echo gain interval value. It can be understood that the first ultrasonic reflection bottom surface echo gain interval value is the partition interval value of the corresponding body region when scanning is performed based on the ultrasonic reflection method. The body region can also include the body region on the suction side. When the ultrasonic scanning result is the ultrasonic reflection scanning result obtained by scanning based on the ultrasonic reflection method, combined withFigure 5 It can be seen that based on the ultrasonic scanning results and the first sub-interval value, the body area of the standard composite fan blade is divided into areas, and the body area after area division can include steps 510 to 530. Each step will be introduced separately below.

[0073] In step 510, based on the first ultrasonic reflection bottom echo gain interval value, a first bottom echo division value is obtained.

[0074] In step 520, based on the ultrasonic reflection scanning results, a first ultrasonic reflection scanning result of the blade suction side body area is obtained.

[0075] In step 530, with the tip of the blade suction side body area as the initial end of the partition and the root of the tenon of the blade suction side body area as the termination end of the partition, when the bottom echo displayed on the oscilloscope is adjusted to a preset multiple of the full screen height, according to the bottom echo energy values of each point of the blade suction side body area recorded in the first ultrasonic reflection scanning result, every time the bottom echo energy value is monitored to decrease to the first bottom echo division value, the blade suction side body area is divided into areas until the entire blade suction side body area is divided, and the blade suction side body area after area division is obtained.

[0076] In one embodiment, the ultrasonic reflection method can be used to scan the entire blade of the fan blade to master the acoustic wave penetration situation, bottom echo situation, noise level, etc. Further, according to the detection and acceptance requirements, considering the noise situation in the area with bottom echo, the ultrasonic reflection method sub-interval ζ (corresponding to the first ultrasonic reflection bottom echo gain interval value) of the composite body of the fan blade (also known as the body area) is determined respectively.

[0077] Based on the first ultrasonic reflection bottom echo gain interval value again, a first bottom echo division value is obtained. In an example, the first bottom echo division value H1 can be expressed as

[0078] In another embodiment, during the process of dividing the first ultrasonic reflection scanning result of the blade suction side body area of the standard composite fan blade, the thinnest part of the composite tip can be used as a reference, and the root of the tenon of the blade suction side body area can be used as the termination point of the partition. The bottom reflection echo is adjusted to 80% of the full screen height, and the gain value θ0 is recorded. When the bottom wave drops to H1%, it is defined as the boundary of body area A; further, on the boundary (A area boundary), the bottom wave is increased to 80% of the full screen height, and the gain value here is θ0 + ζ; when the height of the bottom reflection wave drops from 80% of the full screen height to H1%, the boundary of body area B is obtained; then on the B area boundary, the bottom reflection wave is adjusted to 80%, and the gain value at this time is θ0 + 2ζ, and so on, until the entire blade suction side body area is divided, and the blade suction side body area after area division is obtained. Among them, Figure 6It shows a schematic diagram of the personalized zoning of the blade front and back side composite material body by the ultrasonic detection reflection method. In this embodiment, for different ultrasonic methods (such as the ultrasonic reflection method), the blade front and back side body areas will be personalizedly zoned in a way corresponding to the ultrasonic method, so as to achieve reasonable zoning of the fan blade, thereby avoiding the problems of missed detection and misjudgment during the ultrasonic detection of the whole blade.

[0079] Figure 7 It is a second schematic diagram of the regional division of the edge region of a standard composite fan blade based on the ultrasonic scanning result and the second interval value between partitions.

[0080] The following will combine Figure 7 to illustrate the zoning process of the blade front and back side edge regions based on the reflection method.

[0081] In an exemplary embodiment of the present disclosure, the second interval value between partitions may include the second ultrasonic reflection bottom echo gain interval value. It can be understood that the second ultrasonic reflection bottom echo gain interval value is the interval value between partitions of the edge region corresponding to the case of scanning based on the ultrasonic reflection method. The edge region may also include the blade front and back side edge regions. When the ultrasonic scanning result is the ultrasonic reflection scanning result obtained by scanning based on the ultrasonic reflection method, combining Figure 7 it can be known that based on the ultrasonic scanning result and the second interval value between partitions, the edge region of the standard composite fan blade is regionally divided to obtain the edge region after regional division, which may include steps 710 to 730. The following will introduce each step separately.

[0082] In step 710, based on the second ultrasonic reflection bottom echo gain interval value, a second bottom echo division value is obtained;

[0083] In step 720, based on the ultrasonic reflection scanning result, a second ultrasonic reflection scanning result of the blade front and back side edge region is obtained;

[0084] In step 730, with the tip of the blade front and back side edge region as the initial end of zoning and the root of the tenon of the blade front and back side edge region as the termination end of zoning, when the bottom echo displayed on the oscilloscope is adjusted to a preset multiple of the full screen height, according to the bottom echo energy values of each point of the blade front and back side edge region recorded in the second ultrasonic reflection scanning result, every time the bottom echo energy value is monitored to decrease to the second bottom echo division value, the blade front and back side edge region is regionally divided until the entire blade front and back side edge region is divided, obtaining the blade front and back side edge region after regional division.

[0085] In one embodiment, the ultrasonic reflection method can be used to scan the entire blade body of the fan blade to master the acoustic wave penetration, bottom surface echo, noise level, etc. Further, according to the detection and acceptance requirements, considering the noise conditions in the areas with bottom surface echoes, the ultrasonic reflection method interval η (corresponding to the second ultrasonic reflection bottom surface echo gain interval value) of the composite material edge bonding area (also known as the edge area) of the fan blade is determined respectively.

[0086] Based on the second ultrasonic reflection bottom surface echo gain interval value, the second bottom surface echo division value is obtained. In one example, the second bottom surface echo division value H2 can be expressed as

[0087] In another embodiment, during the process of dividing the area of the second ultrasonic reflection scan result of the shroud side edge area of the standard composite material fan blade, the tip of the shroud side edge area is used as the initial end of the partition, and the root of the tenon of the shroud side edge area is used as the termination end of the partition. That is, taking the thinnest part of the shroud tip as the reference, adjusting the bottom reflection echo to 80% of the full screen height, recording the gain value κ0, when the bottom wave drops to H2%, it is defined as the boundary of the edge A area; further, on the edge boundary (A area boundary), the bottom wave is increased to 80% of the full screen height, and the gain value here is κ0 + η; when the height of the bottom reflection wave drops from 80% of the full screen height to H2%, the boundary of the edge B area is obtained; then on the edge B area boundary, the bottom reflection wave height is adjusted to 80%, and the gain value at this time is θ0 + 2η, and so on, until the entire shroud side edge area is divided, and the shroud side edge area after area division is obtained. In this embodiment, during the detection process using the ultrasonic reflection method, personalized partitioning of the shroud side edge area is performed in a manner corresponding to the ultrasonic reflection method, so as to realize reasonable partitioning of the fan blade, thereby avoiding missed detection and misjudgment problems that occur during the ultrasonic detection of the entire blade.

[0088] In another exemplary embodiment of the present disclosure, the first interval value may further include the first ultrasonic reflection bottom surface echo gain interval value, and the body area may further include the back side body area of the fan blade. In the case where the ultrasonic scan result is the ultrasonic reflection scan result obtained by scanning based on the ultrasonic reflection method, based on the ultrasonic scan result and the first interval value, the area of the body area of the standard composite material fan blade is divided to obtain the body area after area division, which can be achieved by the following method:

[0089] Based on the first ultrasonic reflection bottom surface echo gain interval value, the first bottom surface echo division value is obtained;

[0090] Based on the ultrasonic reflection scan result, the third ultrasonic reflection scan result of the back side body area of the fan blade is obtained;

[0091] Taking the tip of the leaf dorsal body region as the initial end of the partition, and the root of the tenon of the leaf dorsal body region as the termination end of the partition, when the bottom echo displayed on the oscilloscope is adjusted to a preset multiple of the full screen height, according to the bottom echo energy values of each point in the leaf dorsal body region recorded in the third ultrasonic reflection scanning result, every time the bottom echo energy value is monitored to decrease to the first bottom echo division value, the leaf dorsal body region is divided until the entire leaf dorsal body region is divided, and the leaf dorsal body region after regional division is obtained.

[0092] It should be noted that the method of dividing the leaf dorsal body region can refer to the method of dividing the leaf ventral body region, and the difference is that the third ultrasonic reflection scanning result of the leaf dorsal body region is different from the first ultrasonic reflection scanning result of the leaf ventral body region. In this embodiment, the process of dividing the leaf dorsal body region will not be elaborated.

[0093] In another exemplary embodiment of the present disclosure, the second sub-interval value may include the second ultrasonic reflection bottom echo gain interval value, and the edge region may include the leaf dorsal edge region. When the ultrasonic scanning result is the ultrasonic reflection scanning result obtained by the ultrasonic reflection method, based on the ultrasonic scanning result and the second sub-interval value, the edge region of the standard composite fan blade is divided to obtain the edge region after regional division, which can be achieved by the following method:

[0094] Based on the second ultrasonic reflection bottom echo gain interval value, the second bottom echo division value is obtained;

[0095] Based on the ultrasonic reflection scanning result, the fourth ultrasonic reflection scanning result of the leaf dorsal edge region is obtained;

[0096] Taking the tip of the leaf dorsal edge region as the initial end of the partition, and the root of the tenon of the leaf dorsal edge region as the termination end of the partition, when the bottom echo displayed on the oscilloscope is adjusted to a preset multiple of the full screen height, according to the bottom echo energy values of each point in the leaf dorsal edge region recorded in the fourth ultrasonic reflection scanning result, every time the bottom echo energy value is monitored to decrease to the second bottom echo division value, the leaf dorsal edge region is divided until the entire leaf dorsal edge region is divided, and the leaf dorsal edge region after regional division is obtained.

[0097] It should be noted that the method of dividing the leaf dorsal edge region can refer to the method of dividing the leaf ventral edge region, and the difference is that the fourth ultrasonic reflection scanning result of the leaf dorsal edge region is different from the second ultrasonic reflection scanning result of the leaf ventral edge region. In this embodiment, the process of dividing the leaf dorsal edge region will not be elaborated.

[0098] As described above, the method for determining the partition of the composite material fan blade provided by the present disclosure includes a penetration method and a reflection method for detecting and determining the partition; using this method, the fan blade with complex changes in external and internal structures can be regularly partitioned to adapt to the detection and evaluation of different ultrasonic detection methods. This partition method ensures that the sensitivity change in the same detection partition is limited within a certain range, thereby avoiding missed detection and misjudgment caused by drastic changes in sensitivity, and making the detection and evaluation results more reliable.

[0099] Based on the same concept, the embodiment of the present disclosure also provides a device for determining the partition of a composite material fan blade.

[0100] It can be understood that in order to achieve the above functions, the device for determining the partition of the composite material fan blade provided by the embodiment of the present disclosure includes the corresponding hardware structure and / or software module for executing each function. Combining the units and algorithm steps of the examples disclosed in the embodiment of the present disclosure, the embodiment of the present disclosure can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the technical solution of the embodiment of the present disclosure.

[0101] Figure 8 It is a block diagram showing the determination of the partition of a composite material fan blade according to an exemplary embodiment.

[0102] In an exemplary embodiment of the present disclosure, referring to Figure 8 it can be seen that the device for determining the partition of the composite material fan blade may include an acquisition module 810, a determination module 820, a division module 830, and a processing module 840. Each module will be introduced separately below.

[0103] The acquisition module 810 can be configured to acquire a standard composite material fan blade, where the defect rate of the standard composite material fan blade is less than the defect rate threshold, and the porosity of the standard composite material fan blade is less than the porosity threshold;

[0104] The determination module 820 can be configured to determine the partition interval value of the standard composite material fan blade and the ultrasonic scanning result of the standard composite material fan blade;

[0105] The division module 830 can be configured to divide the standard composite material fan blade based on the ultrasonic scanning result and the partition interval value to obtain the standard composite material fan blade after regional division;

[0106] The processing module 840 can be configured to divide the composite material fan blade to be processed according to the partition boundaries of each region in the standard composite material fan blade after regional division.

[0107] In an exemplary embodiment of the present disclosure, the interval value between partitions includes a first interval value between partitions in the body region of the standard composite material fan blade and a second interval value between partitions in the edge region of the standard composite material fan blade;

[0108] The dividing module 830 can be implemented in the following manner to divide the standard composite material fan blade based on the ultrasonic scanning result and the interval value between partitions, so as to obtain the standard composite material fan blade after regional division:

[0109] Based on the ultrasonic scanning result and the first interval value between partitions, divide the body region of the standard composite material fan blade to obtain the body region after regional division;

[0110] Based on the ultrasonic scanning result and the second interval value between partitions, divide the edge region of the standard composite material fan blade to obtain the edge region after regional division;

[0111] Based on the body region after regional division and the edge region after regional division, obtain the standard composite material fan blade after regional division.

[0112] In an exemplary embodiment of the present disclosure, the first interval value between partitions includes a first ultrasonic penetration energy attenuation interval value. When the ultrasonic scanning result is an ultrasonic penetration C-scan result obtained by scanning based on the ultrasonic penetration method, the dividing module 830 can be implemented in the following manner to divide the body region of the standard composite material fan blade based on the ultrasonic scanning result and the first interval value between partitions, so as to obtain the body region after regional division:

[0113] Based on the ultrasonic penetration C-scan result, obtain the first ultrasonic penetration C-scan result of the body region;

[0114] Taking the root of the tenon in the body region as the initial end of the partition and the tip of the blade in the body region as the termination end of the partition, divide the body region at intervals of the first ultrasonic penetration energy attenuation interval value according to the penetration energy values of each point in the body region recorded in the first ultrasonic penetration C-scan result until the entire body region is divided, so as to obtain the body region after regional division.

[0115] In an exemplary embodiment of the present disclosure, the second sub - interval value includes a second ultrasonic penetration energy attenuation interval value. When the ultrasonic scanning result is an ultrasonic penetration C - scan result obtained by ultrasonic penetration method, the partitioning module 830 may implement the partitioning of the edge - wrapping region of the standard composite fan blade based on the ultrasonic scanning result and the second sub - interval value in the following manner:

[0116] Based on the ultrasonic penetration C - scan result, obtain the second ultrasonic penetration C - scan result of the edge - wrapping region;

[0117] Taking one end of the edge - wrapping region close to the root of the tenon as the initial partitioning end, and the tip of the blade of the edge - wrapping region as the partitioning termination end, according to the penetration energy values of each point in the edge - wrapping region recorded in the second ultrasonic penetration C - scan result, partition the edge - wrapping region at intervals of the second ultrasonic penetration energy attenuation interval value until the entire edge - wrapping region is partitioned, obtaining the edge - wrapping region after regional partitioning.

[0118] In an exemplary embodiment of the present disclosure, the first sub - interval value includes a first ultrasonic reflection bottom - echo gain interval value, and the body region includes the body region on the suction side. When the ultrasonic scanning result is an ultrasonic reflection scanning result obtained by ultrasonic reflection method, the partitioning module 830 may implement the partitioning of the body region of the standard composite fan blade based on the ultrasonic scanning result and the first sub - interval value to obtain the body region after regional partitioning in the following manner:

[0119] Based on the first ultrasonic reflection bottom - echo gain interval value, obtain the first bottom - echo partitioning value;

[0120] Based on the ultrasonic reflection scanning result, obtain the first ultrasonic reflection scanning result of the body region on the suction side;

[0121] Taking the tip of the blade of the body region on the suction side as the initial partitioning end, and the root of the tenon of the body region on the suction side as the partitioning termination end, when the bottom - echo displayed on the oscilloscope is adjusted to a preset multiple of the full - screen height, according to the bottom - echo energy values of each point in the body region on the suction side recorded in the first ultrasonic reflection scanning result, partition the body region on the suction side every time the bottom - echo energy value drops to the first bottom - echo partitioning value until the entire body region on the suction side is partitioned, obtaining the body region on the suction side after regional partitioning.

[0122] In an exemplary embodiment of the present disclosure, the second sub-interval value includes the second ultrasonic reflection bottom echo gain interval value, the edge wrapping region includes the blade suction and pressure side edge wrapping region. When the ultrasonic scanning result is an ultrasonic reflection scanning result obtained by ultrasonic reflection method, the partitioning module 830 may partition the edge wrapping region of the standard composite fan blade based on the ultrasonic scanning result and the second sub-interval value in the following manner to obtain the edge wrapping region after region partitioning:

[0123] Based on the second ultrasonic reflection bottom echo gain interval value, obtain the second bottom echo partitioning value;

[0124] Based on the ultrasonic reflection scanning result, obtain the second ultrasonic reflection scanning result of the blade suction and pressure side edge wrapping region;

[0125] Taking the tip of the blade suction and pressure side edge wrapping region as the initial end of partitioning and the root of the tenon of the blade suction and pressure side edge wrapping region as the termination end of partitioning, when the bottom echo displayed on the oscilloscope is adjusted to a preset multiple of the full screen height, according to the bottom echo energy values of each point in the blade suction and pressure side edge wrapping region recorded in the second ultrasonic reflection scanning result, partition the blade suction and pressure side edge wrapping region every time the monitored bottom echo energy value drops to the second bottom echo partitioning value until the entire blade suction and pressure side edge wrapping region is partitioned to obtain the blade suction and pressure side edge wrapping region after region partitioning.

[0126] In an exemplary embodiment of the present disclosure, the first sub-interval value includes the first ultrasonic reflection bottom echo gain interval value, the body region includes the blade back side body region. When the ultrasonic scanning result is an ultrasonic reflection scanning result obtained by ultrasonic reflection method, the partitioning module 830 may partition the body region of the standard composite fan blade based on the ultrasonic scanning result and the first sub-interval value in the following manner to obtain the body region after region partitioning:

[0127] Based on the first ultrasonic reflection bottom echo gain interval value, obtain the first bottom echo partitioning value;

[0128] Based on the ultrasonic reflection scanning result, obtain the third ultrasonic reflection scanning result of the blade back side body region;

[0129] Taking the tip of the blade back side body region as the initial end of partitioning and the root of the tenon of the blade back side body region as the termination end of partitioning, when the bottom echo displayed on the oscilloscope is adjusted to a preset multiple of the full screen height, according to the bottom echo energy values of each point in the blade back side body region recorded in the third ultrasonic reflection scanning result, partition the blade back side body region every time the monitored bottom echo energy value drops to the first bottom echo partitioning value until the entire blade back side body region is partitioned to obtain the blade back side body region after region partitioning.

[0130] In an exemplary embodiment of the present disclosure, the second sub-interval value includes a second ultrasonic reflection bottom echo gain interval value, and the edge wrapping region includes a back-side edge wrapping region of the blade. When the ultrasonic scanning result is an ultrasonic reflection scanning result obtained by ultrasonic reflection method, the partitioning module 830 may partition the edge wrapping region of the standard composite fan blade based on the ultrasonic scanning result and the second sub-interval value in the following manner to obtain the edge wrapping region after regional partitioning:

[0131] Based on the second ultrasonic reflection bottom echo gain interval value, obtain a second bottom echo partitioning value;

[0132] Based on the ultrasonic reflection scanning result, obtain a fourth ultrasonic reflection scanning result of the back-side edge wrapping region of the blade;

[0133] Taking the tip of the back-side edge wrapping region of the blade as the initial end of the partition and the root of the tenon of the back-side edge wrapping region as the termination end of the partition, when the bottom echo displayed on the oscilloscope is adjusted to a preset multiple of the full screen height, according to the bottom echo energy values of each point of the back-side edge wrapping region recorded in the fourth ultrasonic reflection scanning result, each time the bottom echo energy value is monitored to decrease to the second bottom echo partitioning value, partition the back-side edge wrapping region until the entire back-side edge wrapping region is partitioned to obtain the back-side edge wrapping region after regional partitioning.

[0134] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment related to the method, and will not be elaborated here.

[0135] Figure 9 Illustrates a schematic diagram of the physical structure of an electronic device, such as Figure 9As shown in the figure, the electronic device may include: a processor 910, a communications interface 920, a memory 930, and a communication bus 940. Among them, the processor 910, the communications interface 920, and the memory 930 communicate with each other through the communication bus 940. The processor 910 may call the logical instructions in the memory 930 to execute the method for determining the partition of the composite material fan blade. Among them, the method includes: obtaining a standard composite material fan blade, where the defect rate of the standard composite material fan blade is less than the defect rate threshold, and the porosity of the standard composite material fan blade is less than the porosity threshold; determining the partition interval value of the standard composite material fan blade and the ultrasonic scan result of the standard composite material fan blade; based on the ultrasonic scan result and the partition interval value, performing regional division on the standard composite material fan blade to obtain the standard composite material fan blade after regional division; and performing regional division on the composite material fan blade to be processed according to the partition boundaries of each region in the standard composite material fan blade after regional division.

[0136] In addition, when the logical instructions in the above-mentioned memory 930 are implemented in the form of software functional units and sold or used as an independent product, they may be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of this technical solution, may be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs that can store program codes.

[0137] On the other hand, the present invention also provides a computer program product, which includes a computer program. The computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the composite material fan blade partition determination method provided by each of the above methods. Wherein, the method includes: obtaining a standard composite material fan blade, wherein the defect rate of the standard composite material fan blade is less than a defect rate threshold, and the porosity of the standard composite material fan blade is less than a porosity threshold; determining the partition interval value of the standard composite material fan blade and the ultrasonic scanning result of the standard composite material fan blade; based on the ultrasonic scanning result and the partition interval value, performing regional division on the standard composite material fan blade to obtain a standard composite material fan blade after regional division; and performing regional division on the composite material fan blade to be processed according to the partition boundaries of each region in the standard composite material fan blade after regional division.

[0138] In another aspect, the present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it is configured to execute the composite material fan blade partition determination method provided by each of the above methods. Wherein, the method includes: obtaining a standard composite material fan blade, wherein the defect rate of the standard composite material fan blade is less than a defect rate threshold, and the porosity of the standard composite material fan blade is less than a porosity threshold; determining the partition interval value of the standard composite material fan blade and the ultrasonic scanning result of the standard composite material fan blade; based on the ultrasonic scanning result and the partition interval value, performing regional division on the standard composite material fan blade to obtain a standard composite material fan blade after regional division; and performing regional division on the composite material fan blade to be processed according to the partition boundaries of each region in the standard composite material fan blade after regional division.

[0139] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative efforts.

[0140] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on such an understanding, the essence of the above technical solution, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0141] It can be further understood that although the operations are described in a specific order in the drawings in the embodiments of the present invention, it should not be understood as requiring the operations to be performed in the specific order shown or in a serial order, or requiring all the operations shown to obtain the desired result. In a specific environment, multitasking and parallel processing may be advantageous.

[0142] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for determining partitions of a composite fan blade, wherein: The method comprises: Acquire a standard composite fan blade, wherein a defect rate of the standard composite fan blade is less than a defect rate threshold, and a porosity of the standard composite fan blade is less than a porosity threshold; Determining a partition spacing value of the standard composite fan blade and an ultrasonic scanning result of the standard composite fan blade; Based on the ultrasonic scanning result and the partition interval value, the standard composite fan blade is divided into regions to obtain a standard composite fan blade after the region division; The composite fan blade to be processed is divided into regions according to the partition boundaries of each region in the standard composite fan blade after the region division.

2. The method for determining the partition of a composite fan blade according to claim 1, wherein: The partition interval value includes a first partition interval value of a body region of the standard composite fan blade and a second partition interval value of a hemming region of the standard composite fan blade; The method of dividing the standard composite fan blade into regions based on the ultrasonic scanning result and the partition interval value to obtain the standard composite fan blade after the region division includes: Based on the ultrasonic scanning result and the first partition interval value, the body area of ​​the standard composite fan blade is divided into regions to obtain a body area after the region division; Based on the ultrasonic scanning result and the second partition interval value, the edge binding area of ​​the standard composite material fan blade is divided into regions to obtain the edge binding area after the region division; Based on the main body area after the area division and the edge area after the area division, a standard composite material fan blade after the area division is obtained.

3. The method for determining the partition of a composite fan blade according to claim 2, wherein: The first partition interval value includes a first ultrasonic penetration energy attenuation interval value. When the ultrasonic scanning result is an ultrasonic penetration C-scan result obtained by scanning based on an ultrasonic penetration method, the body area of ​​the standard composite fan blade is divided into regions based on the ultrasonic scanning result and the first partition interval value to obtain the body area after the region division, including: Based on the ultrasonic penetration C-scan result, obtaining a first ultrasonic penetration C-scan result of the body area; The root of the tenon of the main body area is used as the initial end of the partition, and the tip of the blade of the main body area is used as the termination end of the partition. According to the penetration energy value of each point in the main body area recorded in the first ultrasonic penetration C-scan result, the main body area is divided into regions at intervals of the first ultrasonic penetration energy attenuation interval until the entire main body area is divided, thereby obtaining the main body area after region division.

4. The method for determining the partition of a composite fan blade according to claim 2, wherein: The second partition interval value includes a second ultrasonic penetration energy attenuation interval value. When the ultrasonic scanning result is an ultrasonic penetration C-scan result obtained by scanning based on an ultrasonic penetration method, the edge wrapping area of ​​the standard composite material fan blade is divided into regions based on the ultrasonic scanning result and the second partition interval value to obtain the edge wrapping area after the region division, including: Based on the ultrasonic penetration C-scan result, obtaining a second ultrasonic penetration C-scan result of the hemming area; Taking the end of the edging area close to the root of the tenon as the initial end of the partition, and the blade tip of the edging area as the ending end of the partition, the edging area is divided into regions at intervals of the second ultrasonic penetration energy attenuation interval value according to the penetration energy value of each point in the edging area recorded in the second ultrasonic penetration C-scan result, until the entire edging area is divided, thereby obtaining the edging area after region division.

5. The method for determining the partition of a composite fan blade according to claim 2, wherein: The first partition interval value includes a first ultrasonic reflection bottom surface echo gain interval value, the body area includes a blade basin side body area, and when the ultrasonic scanning result is an ultrasonic reflection scanning result obtained by scanning based on an ultrasonic reflection method, the body area of ​​the standard composite fan blade is divided into regions based on the ultrasonic scanning result and the first partition interval value to obtain the body area after the region division, including: Obtaining a first bottom surface echo division value based on the first ultrasonic reflection bottom surface echo gain interval value; Based on the ultrasonic reflection scanning result, obtaining a first ultrasonic reflection scanning result of the main body area on the blade basin side; Taking the tip of the blade basin side body area as the initial end of the partition and the root of the tenon of the blade basin side body area as the ending end of the partition, when the bottom surface echo displayed on the oscilloscope is adjusted to a preset multiple of the full screen height, according to the bottom surface echo energy value of each point in the blade basin side body area recorded in the first ultrasonic reflection scanning result, the blade basin side body area is divided into regions each time the bottom surface echo energy value is monitored to be reduced to the first bottom surface echo division value, until the entire blade basin side body area is divided, thereby obtaining the blade basin side body area after region division.

6. The method for determining the partition of a composite fan blade according to claim 2, wherein: The second partition interval value includes a second ultrasonic reflection bottom surface echo gain interval value, the edge area includes a blade basin side edge area, and when the ultrasonic scanning result is an ultrasonic reflection scanning result obtained by scanning based on an ultrasonic reflection method, the edge area of ​​the standard composite material fan blade is divided into regions based on the ultrasonic scanning result and the second partition interval value to obtain the edge area after region division, including: Based on the second ultrasonic reflection bottom surface echo gain interval value, obtaining a second bottom surface echo division value; Based on the ultrasonic reflection scanning result, obtaining a second ultrasonic reflection scanning result of the blade basin side edge wrapping area; Taking the blade tip of the blade basin side edging area as the initial end of the partition and the tenon root of the blade basin side edging area as the ending end of the partition, when the bottom surface echo displayed on the oscilloscope is adjusted to a preset multiple of the full screen height, the blade basin side edging area is divided into regions according to the bottom surface echo energy value of each point in the blade basin side edging area recorded in the second ultrasonic reflection scanning result, each time the bottom surface echo energy value is monitored to drop to the second bottom surface echo division value, until the entire blade basin side edging area is divided, thereby obtaining the blade basin side edging area after region division.

7. The method for determining the partitions of a composite fan blade according to claim 2, wherein: The first partition interval value includes a first ultrasonic reflection bottom surface echo gain interval value, the body area includes a blade back side body area, and when the ultrasonic scanning result is an ultrasonic reflection scanning result obtained by scanning based on an ultrasonic reflection method, the body area of ​​the standard composite material fan blade is divided into regions based on the ultrasonic scanning result and the first partition interval value to obtain a body area after region division, including: Obtaining a first bottom surface echo division value based on the first ultrasonic reflection bottom surface echo gain interval value; Based on the ultrasonic reflection scanning result, obtaining a third ultrasonic reflection scanning result of the back side body area of ​​the leaf; Taking the tip of the blade back body area as the initial end of the partition and the root of the tenon of the blade back body area as the ending end of the partition, when the bottom surface echo displayed in the oscilloscope is adjusted to a preset multiple of the full screen height, according to the bottom surface echo energy value of each point in the blade back body area recorded in the third ultrasonic reflection scanning result, the blade back body area is divided into regions each time the bottom surface echo energy value is monitored to be reduced to the first bottom surface echo division value, until the entire blade back body area is divided, thereby obtaining the blade back body area after region division.

8. The method for determining the partitions of a composite fan blade according to claim 2, wherein: The second partition interval value includes a second ultrasonic reflection bottom surface echo gain interval value, the edge area includes a blade back side edge area, and when the ultrasonic scanning result is an ultrasonic reflection scanning result obtained by scanning based on an ultrasonic reflection method, the edge area of ​​the standard composite material fan blade is divided into regions based on the ultrasonic scanning result and the second partition interval value to obtain the edge area after region division, including: Based on the second ultrasonic reflection bottom surface echo gain interval value, obtaining a second bottom surface echo division value; Based on the ultrasonic reflection scanning result, obtaining a fourth ultrasonic reflection scanning result of the leaf back side edging area; Taking the tip of the leaf back side edging area as the initial end of the partition and the root of the tenon of the leaf back side edging area as the ending end of the partition, when the bottom surface echo displayed on the oscilloscope is adjusted to a preset multiple of the full screen height, the leaf back side edging area is divided into regions according to the bottom surface echo energy value of each point in the leaf back side edging area recorded in the fourth ultrasonic reflection scanning result, each time the bottom surface echo energy value is monitored to decrease to the second bottom surface echo division value, until the entire leaf back side edging area is divided, thereby obtaining the leaf back side edging area after region division.

9. A composite material fan blade partition determination device, wherein: The device comprises: An acquisition module, used for acquiring a standard composite fan blade, wherein a defect rate of the standard composite fan blade is less than a defect rate threshold, and a porosity of the standard composite fan blade is less than a porosity threshold; A determination module, used to determine the partition interval value of the standard composite fan blade and the ultrasonic scanning result of the standard composite fan blade; A partitioning module, used for partitioning the standard composite fan blade into regions based on the ultrasonic scanning result and the partition interval value, to obtain a standard composite fan blade after the region partitioning; The processing module is used to divide the composite material fan blade to be processed into regions according to the partition boundaries of each region in the standard composite material fan blade after the region division.

10. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the method for determining the partition of a composite fan blade according to any one of claims 1 to 8 is implemented.

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