A whole closed vane ring positive and negative splicing quick measurement method

Abstract

The present application relates to aerospace integral closed shroud blade profile measurement and analysis technical field, specifically discloses a kind of integral closed shroud positive and negative splicing fast measurement method, comprising: obtaining the closed shroud to be measured, and establishing positive part coordinate system;In the current positive attitude, the position of each standard ball on the closed shroud to be measured relative to positive part coordinate system and relative to machine tool coordinate system is measured;In positive part coordinate system, obtain the point cloud data of the front surface of the blade to be measured;The closed shroud to be measured is reversed, and the position of each standard ball relative to machine tool coordinate system is measured in the current reverse attitude, and reverse part coordinate system is calculated;In reverse part coordinate system, obtain the point cloud data of the back surface of the blade to be measured;The point cloud data under two kinds of attitudes is spliced and integrated to form the complete profile point cloud data of the closed shroud to be measured.The present application solves the problem of large closed shroud detection blind area and low detection efficiency by positive and negative clamping measurement twice.

Description

Technical Field

[0001] This invention relates to the field of aerospace integral closed blade ring airfoil measurement and analysis technology, and more specifically, to a rapid measurement method for integral closed blade rings with forward and reverse splicing. Background Technology

[0002] Integral closed blade rings are generally large in size, complex in structure, and have a large number of blades. The blades are located in a closed area with narrow gaps and blade twisting, which easily leads to interference during measurement and many blind spots. Conventional coordinate measuring machine (CMM) methods for blade profile inspection mostly involve collecting profile data in a single measurement and analysis under flat or vertical orientation. When the blade ring is flat, measurement is prone to interference, the interference-free measurement area is limited, and the blade profile data is incomplete. When the part is vertically positioned for measurement, the large number of blades requires multiple disassembly and reassembly adjustments to the blade ring's orientation, resulting in low inspection efficiency and high labor costs. To overcome the current measurement bottlenecks, new inspection methods need to be developed and invented.

[0003] like Figure 1 As shown, the overall blade ring diameter is approximately 1.5m, with 126 blades evenly distributed along the circumference. Furthermore, the inner and outer ring structures extend significantly beyond the blades along the blade width. Due to the limited probe angle, the complex structure interferes with the probe during a single clamping operation, making certain areas inaccessible (e.g., ...). Figure 1 As shown in the box, a measurement blind zone is formed, making it impossible to perform blade profile detection and analysis. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a rapid measurement method for the front and back splicing of an integral closed blade ring, so as to solve the problems of many blind spots and low detection efficiency in the existing closed blade ring detection.

[0005] As a first aspect of the present invention, a rapid measurement method for integral closed blade rings with front and back splicing is provided, comprising the following steps:

[0006] Step S1: Obtain the closed blade ring to be tested, and connect three standard balls evenly to the closed blade ring to be tested. Import the CAD model corresponding to the closed blade ring to be tested, and call the probe on the measuring device to establish the same coordinate system of the mounted part as the CAD model.

[0007] Step S2: Under the current mounting posture, measure the position of each standard ball on the closed blade ring to be tested relative to the coordinate system of the mounted part and the position relative to the machine tool coordinate system;

[0008] Step S3: Select the blade profile to be tested on the closed blade ring to be tested, divide the front and back measurement areas of the blade profile to be tested, and plan the measurement path within the measurement area that the probe can reach under the front and back clamping postures respectively. In the coordinate system of the mounted part, call the planned front measurement path to obtain the front point cloud data of the blade under the front posture.

[0009] Step S4: Rotate the closed blade ring to be tested 180° and install it in reverse, and measure the position of each standard ball on the closed blade ring to be tested relative to the machine tool coordinate system in the current reverse installation posture;

[0010] Step S5: Based on the positions of the three standard spheres in the forward mounting posture relative to the coordinate system of the forward mounting part and the position relative to the machine tool coordinate system obtained in step S2, and the positions of the three standard spheres in the reverse mounting posture relative to the machine tool coordinate system obtained in step S4, calculate the coordinate system of the reverse mounting part.

[0011] Step S6: In the coordinate system of the reverse-mounted part, call the planned reverse measurement path to obtain the point cloud data of the reverse side of the blade under the reverse-mounted posture;

[0012] Step S7: All the point cloud data of the blade profile obtained under both forward and reverse clamping postures are stitched together to form the complete point cloud data of the closed blade ring to be tested.

[0013] Furthermore, step S1 also includes:

[0014] Import the IGS / STP / Sab format blade ring CAD model into the measurement software Modus. Based on the point, line, and surface reference features marked on the process or measurement drawings, and using the right-hand rule, establish the same coordinate system for the closed blade ring assembly part to be measured as the CAD model.

[0015] Furthermore, step S2 also includes:

[0016] In the current upright posture, the positions of each standard ball on the closed blade ring under test relative to the coordinate system of the upright part and relative to the coordinate system of the machine tool are measured by triggering point sampling or planning path scanning.

[0017] Furthermore, step S3 also includes:

[0018] Based on the structure of the closed blade ring to be tested and the curvature change of the blade to be tested, the blade profile to be tested is divided into front and back measurement areas. The blade profile to be tested is divided into multiple measurement areas. Under both front and back clamping postures, the probe angle, approach / retreat distance, scanning angle range and adjacent path overlap are adjusted. The interference-free measurement path in each measurement area is calculated and optimized and collision checked to ensure that the global measurement path is the shortest and all the divided measurement areas can be completely scanned and covered under both front and back clamping postures.

[0019] Furthermore, step S4 also includes:

[0020] Under the current reverse mounting posture, the position of each standard ball on the closed blade ring under test relative to the machine tool coordinate system is measured by triggering point sampling or planning path scanning.

[0021] Furthermore, step S5 also includes:

[0022] Based on the positions of the three standard spheres relative to the coordinate system of the assembled part and the coordinate system of the machine tool under the positive mounting posture obtained in step S2, and the positions of the three standard spheres relative to the coordinate system of the machine tool under the negative mounting posture obtained in step S4, the theoretical part coordinate system under the negative mounting posture, i.e., the negative mounting part coordinate system, is obtained by matrix calculation.

[0023] Furthermore, the step of obtaining the theoretical part coordinate system under the reverse mounting posture through matrix calculation also includes:

[0024] Establish a spherical coordinate system using the center positions of three standard spheres, with the center of sphere 1 as the origin, and... Using the X-axis as the reference, Using the Z-axis, The Y-axis is used to define the spherical coordinate system.

[0025] in, Let be the vector representation of the line connecting the centers of sphere 1 and sphere 2. The vector representation of the line connecting the centers of spheres 1 and 3;

[0026] The closed blade ring under test has the following characteristics when it is installed correctly:

[0027] When the closed blade ring under test is installed in reverse, the following issues exist:

[0028] Because the three standard spheres are fixedly connected to the closed blade ring body under test, their relative positional relationship remains unchanged, therefore:

[0029] Therefore:

[0030] Therefore:

[0031] Where mcs represents the machine tool coordinate system, wcs+ represents the forward-mounted part coordinate system, wcs- represents the reverse-mounted part coordinate system, o+ represents the forward-mounted spherical coordinate system, and o- represents the reverse-mounted spherical coordinate system.

[0032] Further, step S6 includes:

[0033] In the coordinate system of the reverse-mounted part, select a suitable probe, set a safe distance, call the planned non-interference reverse measurement path, scan and measure the reverse measurement area of ​​the blade under the reverse mounting posture, and obtain the surface point cloud data of the reverse measurement area of ​​the blade under the test.

[0034] Further, step S7 includes:

[0035] Under both forward and reverse clamping postures, cyclic scanning measurements are performed using DMIS language cyclic commands to acquire point cloud data of the front and back surfaces of each blade under test. Then, using DMIS language commands, the acquired point cloud data of the front and back surfaces of each blade under test are spliced ​​and integrated one by one in the coordinate system of the forward-mounted part or the coordinate system of the reverse-mounted part to form complete point cloud data of the closed blade ring under test.

[0036] Furthermore, it also includes:

[0037] Under both forward and reverse mounting postures, the features of each scanned measurement area are defined, named, and assigned values. Then, the measurement areas of each blade under test are cyclically scanned and measured using DMIS language loop commands. This ensures that the point cloud data of each measurement area of ​​each blade under test is stored in the database. Finally, the acquired forward and reverse profile point cloud data are stitched together and integrated using DMIS language commands to form the complete profile point cloud data of the closed blade ring under test.

[0038] The present invention provides a rapid measurement method for the forward and reverse splicing of an integral closed blade ring, which has the following advantages: by measuring with two clamps in both directions, the problem of incomplete data acquisition in a single clamp measurement is solved; the measurement data under the two clamps are transmitted through the positions of three standard balls, so that the data under the two clamping postures can be spliced ​​and complemented to form complete profile data for analysis, and finally a high-precision splicing effect is obtained. This solves the problem of many blind spots and low detection efficiency in the detection of large closed blade rings, thereby achieving the purpose of rapid detection and analysis of multiple blades. Attached Figure Description

[0039] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention, but do not constitute a limitation thereof.

[0040] Figure 1 This is a schematic diagram of a large-scale integral closed blade ring in the prior art.

[0041] Figure 2 The flowchart shows the rapid measurement method for the overall closed blade ring with forward and reverse splicing provided by the present invention.

[0042] Figure 3a This invention provides a non-interference measurement path planning diagram for each region of the blade under upright posture.

[0043] Figure 3b This invention provides a non-interference measurement path planning diagram for each region of the blade under reverse mounting posture. Detailed Implementation

[0044] To further illustrate the technical means and effects adopted by the present invention to achieve its intended purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation, structure, features, and effects of a rapid measurement method for the forward and reverse splicing of an integral closed blade ring according to the present invention. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the protection scope of the present invention.

[0045] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of the invention described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0046] This embodiment provides a rapid measurement method for integral closed blade rings with forward and reverse splicing, such as... Figure 2 As shown, a rapid measurement method for a fully enclosed blade ring with forward and reverse splicing includes the following steps:

[0047] Step S1: Obtain the closed blade ring to be tested, and fix three high-precision standard balls evenly distributed and connected to the circumference of the closed blade ring to be tested, and place the closed blade ring to be tested on a marble platform with an elevation; import the CAD model corresponding to the closed blade ring to be tested, call the probe on the measuring device to establish the same coordinate system of the mounted part as the CAD model;

[0048] Preferably, step S1 further includes:

[0049] Import the IGS / STP / Sab format blade ring CAD model into the measurement software Modus. Based on the point, line, and surface reference features marked on the process or measurement drawings, and using the right-hand rule, establish the same coordinate system for the closed blade ring assembly part to be measured as the CAD model.

[0050] Step S2: Under the current mounting posture, measure the position of each standard ball on the closed blade ring to be tested relative to the coordinate system of the mounted part and the position relative to the machine tool coordinate system;

[0051] It should be noted that the machine tool coordinate system is the inherent coordinate system of the measuring equipment, which has a fixed origin and X, Y, and Z axes.

[0052] Preferably, step S2 further includes:

[0053] In the coordinate system of the mounted part, the positions of each standard ball on the closed blade ring under test relative to the coordinate system of the mounted part and relative to the coordinate system of the machine tool are measured by triggering point sampling or planning path scanning.

[0054] It should be noted that the specified methods for measuring three high-precision standard spheres generally include two methods: trigger sampling or planned path scanning. This ensures that the method for measuring the standard spheres in both the forward and reverse mounting positions is consistent (i.e., triggering the sampling of the same points or scanning the same path), thereby eliminating measurement errors caused by different measurement methods in the forward and reverse mounting positions.

[0055] It should be noted that the center positions (X, Y, Z) of each standard sphere are output in both the coordinate system of the mounted part and the coordinate system of the machine tool. The center positions of the spheres in the two coordinate systems are from the same source, eliminating the error of repeated accuracy.

[0056] Step S3: Select the blade profile to be tested on the closed blade ring, divide the blade profile to be tested into front and back measurement areas, and plan the measurement path within the measurement area reachable by the probe under both front and back clamping postures in APEXBlade software, such as... Figure 3a As shown, in the coordinate system of the mounted part, the front point cloud data of the blade under the mounted attitude is obtained by calling the front measurement path planned by the APEXBlade software through the measurement software Modus.

[0057] Preferably, step S3 further includes:

[0058] Based on the structure of the closed blade ring to be tested and the curvature change of the blade to be tested, the blade profile to be tested is divided into front and back measurement areas. The blade profile to be tested is divided into multiple measurement areas. Under both front and back clamping postures, the probe angle, approach / retreat distance, scanning angle range and adjacent path overlap are adjusted. The interference-free measurement path in each measurement area is calculated and optimized and collision checked to ensure that the global measurement path is the shortest and all the divided measurement areas can be completely scanned and covered under both front and back clamping postures.

[0059] Step S4: Rotate the closed blade ring to be tested 180° and install it upside down, then place it flat on the three-coordinate marble table. Measure the position of each standard ball on the closed blade ring to be tested relative to the machine tool coordinate system in the current reversed position.

[0060] Preferably, step S4 further includes:

[0061] Under the current reverse mounting posture, the position of each standard ball on the closed blade ring under test relative to the machine tool coordinate system is measured by triggering point sampling or planning path scanning.

[0062] Step S5: Based on the positions of the three standard spheres in the forward mounting posture relative to the coordinate system of the forward mounting part and the position relative to the machine tool coordinate system obtained in step S2, and the positions of the three standard spheres in the reverse mounting posture relative to the machine tool coordinate system obtained in step S4, calculate the coordinate system of the reverse mounting part.

[0063] Preferably, step S5 further includes:

[0064] Since the three standard spheres are fixedly connected to the overall closed blade ring, there is a fixed relative positional relationship between them. Based on the positions of the three standard spheres relative to the coordinate system of the mounted part and the coordinate system of the machine tool in the positive mounting posture obtained in step S2, and the positions of the three standard spheres relative to the coordinate system of the machine tool in the reverse mounting posture obtained in step S4, the theoretical part coordinate system in the reverse mounting posture, i.e., the reverse mounting part coordinate system, is obtained by matrix calculation.

[0065] Specifically, obtaining the theoretical part coordinate system under the reverse mounting posture through matrix calculation also includes:

[0066] Establish a spherical coordinate system using the center positions of three standard spheres, with the center of sphere 1 as the origin, and... Using the X-axis as the reference, Using the Z-axis, The Y-axis is used to define the spherical coordinate system.

[0067] in, Let be the vector representation of the line connecting the centers of sphere 1 and sphere 2. The vector representation of the line connecting the centers of spheres 1 and 3;

[0068] The closed blade ring under test has the following characteristics when it is installed correctly:

[0069] When the closed blade ring under test is installed in reverse, the following issues exist:

[0070] Because the three standard spheres are fixedly connected to the closed blade ring body under test, their relative positional relationship remains unchanged, therefore:

[0071] Therefore:

[0072] Therefore:

[0073] Where mcs represents the machine tool coordinate system, wcs+ represents the forward-mounted part coordinate system, wcs- represents the reverse-mounted part coordinate system, o+ represents the forward-mounted spherical coordinate system, and o- represents the reverse-mounted spherical coordinate system.

[0074] Step S6: As Figure 3b As shown, in the coordinate system of the reverse-mounted part, the planned reverse measurement path (i.e. the path for measuring the blind zone in the upright posture) is called to obtain the point cloud data of the reverse side of the blade under the reverse posture.

[0075] Preferably, step S6 includes:

[0076] In the coordinate system of the reverse-mounted part, select a suitable probe, set a safe distance, call the planned non-interference reverse measurement path, scan and measure the reverse measurement area of ​​the blade under the reverse mounting posture, and obtain the surface point cloud data of the reverse measurement area of ​​the blade under the test.

[0077] Step S7: All the point cloud data of the blade profile obtained under both forward and reverse clamping postures are stitched together to form the complete point cloud data of the closed blade ring to be tested.

[0078] Preferably, step S7 includes:

[0079] Under both forward and reverse clamping postures, cyclic scanning measurements are performed using DMIS language cyclic commands to acquire point cloud data of the front and back profiles of each blade under test. Then, using DMIS language commands, the acquired point cloud data of the front and back profiles of each blade under test are spliced ​​and integrated one by one in the coordinate system of the forward-mounted part or the coordinate system of the reverse-mounted part to form complete point cloud data of the closed blade ring under test, thereby achieving the purpose of rapid detection and analysis of multiple blades.

[0080] Specifically, it also includes:

[0081] Under both forward and reverse mounting postures, the features of each scanned measurement area are defined, named, and assigned values. Then, the measurement areas of each blade under test are cyclically scanned and measured using DMIS language loop commands. This ensures that the point cloud data of each measurement area of ​​each blade under test is stored in the database. Finally, the acquired forward and reverse profile point cloud data are stitched together and integrated using DMIS language commands to form the complete profile point cloud data of the closed blade ring under test, thereby achieving the purpose of rapid detection and analysis of multiple blades.

[0082] Data was collected and analyzed for the example using both the conventional measurement method and the forward / reverse splicing measurement method described in this paper. The measurement results for the different methods are as follows:

[0083] Using conventional measurement methods, the blade leading edge profile is 0.0078–0.0500.

[0084] The blade leading edge profile is measured using a front and back splicing method, with a range of 0.0071 to 0.0506.

[0085] The measurement results from both methods show a maximum error of only 0.0007. Compared with conventional measurement methods, the forward and reverse splicing measurement has a smaller error and higher accuracy, which can meet general requirements.

[0086] In summary, the rapid measurement method for the front and back splicing of the overall closed blade ring provided by this invention solves the problem of incomplete data acquisition in a single clamping measurement by performing two clamping measurements. The measurement data from the two clamping measurements are transmitted through the positions of three high-precision standard balls, thereby enabling the data from the two clamping postures to be spliced ​​and complemented to form complete profile data for analysis, ultimately obtaining a high-precision splicing effect. This approach solves the problems of many blind spots and low detection efficiency in the detection of large closed blade rings.

[0087] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A rapid measurement method for an integral closed blade ring with forward and reverse splicing, characterized in that, Includes the following steps: Step S1: Obtain the closed blade ring to be tested, and connect three standard balls evenly to the closed blade ring to be tested. Import the CAD model corresponding to the closed blade ring to be tested, and call the probe on the measuring device to establish the same coordinate system of the mounted part as the CAD model. Step S2: Under the current mounting posture, measure the position of each standard ball on the closed blade ring to be tested relative to the coordinate system of the mounted part and the position relative to the machine tool coordinate system; Step S3: Select the blade profile to be tested on the closed blade ring to be tested, divide the front and back measurement areas of the blade profile to be tested, and plan the measurement path within the measurement area that the probe can reach under the front and back clamping postures respectively. In the coordinate system of the mounted part, call the planned front measurement path to obtain the front point cloud data of the blade under the front posture. Step S4: Rotate the closed blade ring to be tested 180° and install it in reverse, and measure the position of each standard ball on the closed blade ring to be tested relative to the machine tool coordinate system in the current reverse installation posture; Step S5: Based on the positions of the three standard spheres in the forward mounting posture relative to the coordinate system of the forward mounting part and the position relative to the machine tool coordinate system obtained in step S2, and the positions of the three standard spheres in the reverse mounting posture relative to the machine tool coordinate system obtained in step S4, calculate the coordinate system of the reverse mounting part. Step S6: In the coordinate system of the reverse-mounted part, call the planned reverse measurement path to obtain the point cloud data of the reverse side of the blade under the reverse-mounted posture; Step S7: All the blade profile point cloud data obtained under both forward and reverse clamping postures are stitched together to form the complete profile point cloud data of the closed blade ring to be tested. Step S5 further includes: Based on the positions of the three standard spheres relative to the coordinate system of the assembled part and the coordinate system of the machine tool under the positive mounting posture obtained in step S2, and the positions of the three standard spheres relative to the coordinate system of the machine tool under the negative mounting posture obtained in step S4, the theoretical part coordinate system under the negative mounting posture, i.e., the negative mounting part coordinate system, is obtained by matrix calculation. The step of obtaining the theoretical part coordinate system under the reverse mounting posture through matrix calculation also includes: Establish a spherical coordinate system using the center positions of three standard spheres, with the center of sphere 1 as the origin, and... Using the X-axis as the reference point, × Using the Z-axis, × The Y-axis is used to define the spherical coordinate system. in, Let be the vector representation of the line connecting the centers of sphere 1 and sphere 2. The vector representation of the line connecting the centers of spheres 1 and 3; The closed blade ring under test has the following characteristics when it is installed correctly: · = ; When the closed blade ring under test is installed in reverse, the following issues exist: · = ; Because the three standard spheres are fixedly connected to the closed blade ring body under test, their relative positional relationship remains unchanged, therefore: = ; Therefore: · = · ; Therefore: = · ·( ); Where mcs represents the machine tool coordinate system, wcs+ represents the forward-mounted part coordinate system, wcs- represents the reverse-mounted part coordinate system, o+ represents the forward-mounted spherical coordinate system, and o- represents the reverse-mounted spherical coordinate system.

2. The rapid measurement method for integral closed blade ring with forward and reverse splicing according to claim 1, characterized in that, Step S1 further includes: Import the IGS / STP / Sab format blade ring CAD model into the measurement software Modus. Based on the point, line, and surface reference features marked on the process or measurement drawings, and using the right-hand rule, establish the same coordinate system for the closed blade ring assembly part to be measured as the CAD model.

3. The rapid measurement method for integral closed blade ring with forward and reverse splicing according to claim 1, characterized in that, Step S2 further includes: In the current upright posture, the positions of each standard ball on the closed blade ring under test relative to the coordinate system of the upright part and relative to the coordinate system of the machine tool are measured by triggering point sampling or planning path scanning.

4. The rapid measurement method for integral closed blade ring with forward and reverse splicing according to claim 1, characterized in that, Step S3 further includes: Based on the structure of the closed blade ring to be tested and the curvature change of the blade to be tested, the blade profile to be tested is divided into front and back measurement areas. The blade profile to be tested is divided into multiple measurement areas. Under both front and back clamping postures, the probe angle, approach / retreat distance, scanning angle range and adjacent path overlap are adjusted. The interference-free measurement path in each measurement area is calculated and optimized and collision checked to ensure that the global measurement path is the shortest and all the divided measurement areas can be completely scanned and covered under both front and back clamping postures.

5. The rapid measurement method for integral closed blade ring with forward and reverse splicing according to claim 1, characterized in that, Step S4 further includes: Under the current reverse mounting posture, the position of each standard ball on the closed blade ring under test relative to the machine tool coordinate system is measured by triggering point sampling or planning path scanning.

6. The rapid measurement method for integral closed blade ring with forward and reverse splicing according to claim 1, characterized in that, Step S6 includes: In the coordinate system of the reverse-mounted part, select a suitable probe, set a safe distance, call the planned non-interference reverse measurement path, scan and measure the reverse measurement area of ​​the blade under the reverse mounting posture, and obtain the surface point cloud data of the reverse measurement area of ​​the blade under the test.

7. The rapid measurement method for integral closed blade ring with forward and reverse splicing according to claim 1, characterized in that, Step S7 includes: Under both forward and reverse clamping postures, cyclic scanning measurements are performed using DMIS language cyclic commands to acquire point cloud data of the front and back surfaces of each blade under test. Then, using DMIS language commands, the acquired point cloud data of the front and back surfaces of each blade under test are spliced ​​and integrated one by one in the coordinate system of the forward-mounted part or the coordinate system of the reverse-mounted part to form complete point cloud data of the closed blade ring under test.

8. The rapid measurement method for integral closed blade ring with forward and reverse splicing according to claim 7, characterized in that, Also includes: Under both forward and reverse mounting postures, the features of each scanned measurement area are defined, named, and assigned values. Then, the measurement areas of each blade under test are cyclically scanned and measured using DMIS language loop commands. This ensures that the point cloud data of each measurement area of ​​each blade under test is stored in the database. Finally, the acquired forward and reverse profile point cloud data are stitched together and integrated using DMIS language commands to form the complete profile point cloud data of the closed blade ring under test.

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