CN113465506A - Method for planning full-data measurement path of blade of aircraft engine - Google Patents

Method for planning full-data measurement path of blade of aircraft engine Download PDF

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CN113465506A
CN113465506A CN202110722789.1A CN202110722789A CN113465506A CN 113465506 A CN113465506 A CN 113465506A CN 202110722789 A CN202110722789 A CN 202110722789A CN 113465506 A CN113465506 A CN 113465506A
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data
degrees
blade
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李兵
辛美婷
魏翔
李磊
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Xian Jiaotong University
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Xian Jiaotong University
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00Measuring arrangements characterised by the use of optical techniques
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00Measuring arrangements characterised by the use of optical techniques
    • G01B11/24Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00Measuring arrangements characterised by the use of mechanical techniques
    • G01B5/003Measuring of motor parts

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  • General Physics & Mathematics (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

The invention discloses a method for planning a full-data measurement path of an aircraft engine blade, which determines the clamping mode of a sensor; installing the sensor according to the clamping mode of the sensor, measuring the blades at-30 degrees, -15 degrees, 0 degrees, 15 degrees, 30 degrees, 150 degrees, 165 degrees, 180 degrees, 195 degrees and 210 degrees to obtain scanning data, and planning the measuring path of the blade profile data; and optimizing the planned measuring path to realize the full-data measurement of the blade profile. The invention realizes the measurement of the blade profile data of the blade back part of the blade basin by using the clamping mode of the laser line scanning sensor and the design of the measurement path, and also realizes the measurement of the front and rear edge data to obtain the complete data of the blade profile. In addition, through an optimization strategy of an experimental path, the rapid measurement of the blade profile data is realized.

Description

Method for planning full-data measurement path of blade of aircraft engine
Technical Field
The invention belongs to the technical field of blade profile size detection, and particularly relates to a method for planning a full-data measurement path of an aircraft engine blade.
Background
Since the industrial revolution, the rapid development of manufacturing industry has gradually become a main factor for promoting the industrialization process. The power device is a heart of mechanical equipment in the manufacturing industry, and has important significance on the durability and the stability of the whole machine. The blade is used as a core component of an aircraft engine, has severe working conditions and can be continuously eroded by creep damage, wet steam corrosion and solid particle abrasion in operation. Meanwhile, the impeller machine is subjected to a complicated stress condition when rotating at a high speed, and may receive various forces from centrifugal tensile stress, steam bending stress, dynamic stress caused by vibration during operation, and the like generated during operation of the equipment. Because the working load is large and the working environment is severe, the blade is always a component with higher failure rate in the engine, and the working performance and the service life of the whole engine are seriously influenced. Therefore, the detection of the surface quality is always an important item in the mechanical engineering discipline.
At present, the traditional leaf detection methods include a standard template, a Coordinate Measuring Machine (CMM) measurement method, a laser spot scanning method, a CCD imaging method, and the like. The blade profile is a typical free-form surface, has the characteristics of strong distortion, thin-wall parts, easy deformation and low damage, and needs to continuously operate under high temperature, high pressure and high speed, and the working condition is severe. The types and the number of the blades are numerous, the shapes and the sizes of the blades are different, and the detection requirements are different, so that the rapid and high-precision blade profile three-dimensional profile measurement is realized. The planning of the detection path is one of the main contents of the space complex curved surface measurement method, and the detection time and cost can be minimized while the part to be detected is accurately detected.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a method for planning a full-data measurement path of an aircraft engine blade, aiming at the defects in the prior art, the blade is placed on a rotating platform, the profile of the blade is scanned in a mode that an incident beam of a measuring head is vertical to a Z axis, then the profile of the blade is scanned according to the characteristics of the profile of the blade, and the measurement method is optimized through analysis according to the obtained measurement data.
The invention adopts the following technical scheme:
a method for planning a full-data measurement path of an aircraft engine blade comprises the following steps:
s1, determining the clamping mode of the sensor;
s2, mounting the sensor according to the clamping mode of the sensor determined in the step S1, measuring the blade at-30 degrees, -15 degrees, -0 degrees, 15 degrees, 30 degrees, 150 degrees, 165 degrees, 180 degrees, 195 degrees and 210 degrees to obtain scanning data, and planning a measuring path of the blade profile data;
and S3, optimizing the measurement path planned in the step S2, and realizing full data measurement of the blade profile.
Specifically, in step S1, the sensor is attached so that the sensor laser beam direction is parallel to the Z-axis direction.
Specifically, in step S2, the planning of the measurement path of the blade profile data specifically includes:
s201, fixing the aero-engine blade on a rotary table through a clamp, wherein the upper edge of the clamp is parallel to the X axis of a blade scanning measuring machine; controlling the sensor to move so that the sensor is positioned at the lower left of the blade profile;
s202, sequentially rotating the rotary table to measure the blades; and acquiring all data of the leaf basin, the leaf back and the front and rear edge parts in a manner of large-area coverage of adjacent data.
Further, in step S201, a part of the incident laser beam is on the blade profile, another part is outside the blade profile, and the measurement trajectory of the optical knife is S-shaped.
Further, in step S201, a Z-axis column is disposed on the bed on one side of the turntable, and a line scanning probe is disposed on the Z-axis column.
Furthermore, an X-axis cross arm is arranged on the Z-axis upright post, and the line scanning measuring head is arranged on the X-axis cross arm.
Furthermore, a Y-axis sliding seat is arranged on the lathe bed, and a Z-axis upright post is arranged on the Y-axis sliding seat.
Further, in step S202, the turntable acquires complete leaf basin and leaf back data and front and rear edge data at-15 °, 0 °, 15 °, 165 °, 180 ° and 195 °, and acquires front and rear edge data at-30 °, 30 °, 150 ° and 210 °.
Specifically, in step S3, the optimized measurement path specifically includes:
and performing pairwise registration on the scanning data in the step S2, analyzing the data inclusion relationship in the registration result, simplifying the measurement path into 6 measurement results, and respectively measuring according to the 6 measurement results and the S-shaped track to be used as the optimized measurement path.
Compared with the prior art, the invention has at least the following beneficial effects:
the invention relates to a method for planning a full-data measurement path of an aircraft engine blade, which comprises the steps of firstly analyzing blade parts, and finishing the planning of an optimal measurement path according to the modeling characteristics of the blade parts; the front part and the rear part in the blade profile are measured by determining the optimal clamping mode of the sensor, so that the key problem that data acquisition is difficult is solved; secondly, establishing an initial measurement path planning scheme through analyzing the blade profile characteristics so as to realize the comprehensive measurement of the blade profile data; and finally, analyzing the acquired data on the basis of the initial measurement path, and optimizing the measurement path by a registration method to obtain an optimal measurement path scheme. Through simple experimental steps, the high-precision and high-efficiency measurement of the blade profile can be realized, the actual problem of a factory is effectively solved, and the detection of aviation blades is met.
Further, the light beam direction in step S1 is parallel to the Z-axis direction, so that an inclination error caused by improper installation of the sensor can be avoided, and the accuracy of the measured data is seriously affected by the existence of the inclination error.
Furthermore, as the longitudinal resolution of the sensor is as high as 0.4 μm, the incident mode that the laser beam of the sensor is parallel to the Z axis can ensure that the front and rear edge data can be measured, and the problem that the front and rear edge data are difficult to measure in the traditional measuring path can be solved. The purpose of measuring the path in step S2 is to obtain all the data of the blade profile with as few measurement times as possible, and it is first necessary to ensure the integrity of the data of the blade profile, and the full coverage measurement of the data of the blade profile is achieved by means of multiple measurements. And then, according to the registration information of the measurement data, the position of the redundant information is determined, and the measurement times are further simplified.
Furthermore, as the distance between adjacent points of the optical knife is 0.02mm, one part of the incident laser beam is on the blade profile, and the other part of the incident laser beam is outside the blade profile, so that neat blade edge information can be obtained. The S-shaped measuring track can reduce the moving times of the measuring machine, thereby reducing random errors caused by the change of the moving axis of the measuring machine.
Furthermore, the Z-axis upright column mainly comprises a fixed guide rail, a servo motor, a coupler, a plate-type roller chain and a dense ball bearing, the stroke is designed to be 360mm, the reading precision of the grating ruler is 0.1 μm, and the single-axis straightness is less than 2 μm. The plate-type roller chain needs to use rollers with lighter weight and good rigidity to reduce friction force between the rollers, and adopts a side-falling placing mode to reduce friction coefficient, and meanwhile, the short-distance installation mode enhances the load bearing capacity of the Z-axis stand column, so that the X-axis suspension arm can be driven by the Z-axis stand column to better ensure the motion precision when moving up and down.
Furthermore, the installation width of the Z-axis upright column is large enough to enable the weight distribution of the X-axis cantilever to be uniform, so that the possibility of X-axis deformation is reduced, and the measurement precision is ensured. The X-axis measuring range is short, and the blade measuring machine can be flexibly controlled to detect the blade profile.
Furthermore, because the X-axis cantilever and the Z-axis upright post are carried on the Y axis, the Z-axis upright post structure is driven to do linear motion along the Y axis direction in the measurement, and the precision of the Y-axis sliding seat is easy to reduce due to stress deformation. In the actual measurement process, after the distance between the blade and the sensor is set, the measuring machine only needs to move the X shaft and the Z shaft, the Y shaft does not need to move in the measurement process, and the Z shaft is arranged on the Y shaft, so that the measurement precision cannot be influenced by the Y shaft.
Furthermore, the purpose of carrying out full data acquisition on the blade profile is to acquire data of each position of the blade profile and obtain the quality evaluation of the blade profile through the analysis of the data. In the invention, the rotating platform is respectively arranged at ten positions of-30 degrees, -15 degrees, -0 degrees, 15 degrees, 30 degrees, 150 degrees, 165 degrees, 180 degrees, 195 degrees and 210 degrees, wherein all data of a blade back part in the blade profile can be obtained at three positions of-15 degrees, -0 degrees and 15 degrees, all data of a blade basin part in the blade profile can be obtained at three positions of 165 degrees, 180 degrees and 195 degrees, and data of a front edge part and a rear edge part can be obtained at four positions of-30 degrees, 150 degrees and 210 degrees, so that the data of all parts of the blade profile can be fully acquired.
Furthermore, the data volume obtained by single measurement is up to 200 ten thousand, and if the complete data of the blade profile is obtained by splicing after 10 times of measurement, the data volume can reach the level of ten million. The blade data integrity is ensured, the number of measurement times is reduced, and the redundant data quantity is reduced.
In summary, the invention utilizes the clamping mode of the laser line scanning sensor and the design of the measuring path, not only realizes the measurement of the blade back part of the blade profile data, but also realizes the measurement of the front and rear edge data, and obtains the complete data of the blade profile. In addition, the blade profile data can be rapidly measured through an optimization strategy of an experimental path.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a block diagram of a blade line scanning system;
FIG. 2 is a schematic view of the sensor being clamped, wherein (a) is the direction of the light beam parallel to the Z-axis, and (b) is the direction of the light beam perpendicular to the Z-axis;
FIG. 3 is a view of a blade profile measuring device, wherein (a) is the relative position of the sensor and the blade, and (b) is a three-dimensional model view of the blade fixture;
FIG. 4 is a schematic diagram of a path measurement range;
FIG. 5 is a schematic diagram of an optimal measurement path;
FIG. 6 is a schematic view of measurement data obtained in two different clamping manners, wherein (a) the light beam direction is parallel to the Z axis, and (b) the light beam direction is perpendicular to the Z axis;
fig. 7 is a graph of the measurement results, in which (a) is 180 °, (b) is 95 °, (c) is 210 °, (d) is a 180 ° trailing edge, (e) is a 195 ° trailing edge, and (f) is a 210 ° trailing edge.
Wherein, 1, the lathe bed; a Y-axis slide carriage; 3. a Z-axis column; 4. a line scanning probe; an X-axis cross arm; 6. a blade; 7. a clamp; 8. a turntable.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "one side", "one end", "one side", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
Various structural schematics according to the disclosed embodiments of the invention are shown in the drawings. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of various regions, layers and their relative sizes and positional relationships shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, according to actual needs.
Referring to fig. 1, the curvature of the front and rear edge portions of the blade profile has a large variation, and the measurement of the front and rear edge portions is always a difficult point in the detection of the blade profile. In addition, because the profile data acquired by non-contact measurement is point cloud data, the measurement times are reduced as much as possible for simplifying the subsequent point cloud data processing method. The invention relates to a blade line scanning measuring device for planning a full-data measuring path of an aero-engine blade, which comprises a lathe bed 1, a Y-axis sliding seat 2, a Z-axis upright post 3, a line scanning measuring head 4, an X-axis cross arm 5, a blade 6, a clamp 7 and a rotary table 8, wherein the X-axis cross arm is connected with the lathe bed 1; the Y-axis sliding seat 2 is arranged on the lathe bed 1, the Z-axis upright post 3 is arranged on the Y-axis sliding seat 2, the Z-axis upright post 3 is provided with an X-axis cross arm 5, and the line scanning measuring head 4 is arranged on the X-axis cross arm 5; the lathe bed 1 is further provided with a rotary table 8, the rotary table 8 is provided with a clamp 7, and the blade 6 is arranged on the clamp 7.
The invention discloses a method for planning a full-data measurement path of an aircraft engine blade, which comprises the following steps:
s1, determining a clamping mode of the sensor, and acquiring front and rear edge data of the blade;
clamping the sensor according to two modes according to the incident direction of the light beam, namely the direction of the light beam is parallel to the Z axis and the direction of the light beam is vertical to the Z axis; and measuring the blade profile by using two clamping modes respectively, and analyzing the characteristics of the measured data so as to determine the clamping mode of the sensor.
The mode that the beam direction of the sensor is parallel to the Z-axis direction cannot ensure that the edge part is just in the sampling frequency range, and the measured data loss at the front edge and the rear edge of the data blade is serious. In addition, the number of times of Z-axis movement of the measuring machine is large, the measuring efficiency is low, and random errors are easily caused.
The acquisition of data at the edge of the blade is realized by a mode that the direction of the light beam of the sensor is parallel to the direction of the Z axis because the longitudinal resolution of the light beam is higher. The blade width is shorter than the blade height, so that the moving times of the measuring machine in the X-axis direction are less, the measuring efficiency is improved, and the measuring error caused by the cantilever starting is reduced. Therefore, the sensor is clamped in a mode that the beam direction is vertical to the Z axis.
S2, planning a blade profile data measurement path to realize full data measurement of the profile;
after the clamping mode of the sensor is determined, a measurement path needs to be planned according to the measurement characteristics of the blade profile. The blade body surface is a twisted variable cross-section curved surface, and due to the fact that the degree of twist of the front edge from the rear edge is large, all data of a blade basin or a blade back portion cannot be obtained in one-time measurement, all data of a blade profile are obtained in a multi-time measurement mode, and the measurement steps are as follows:
s201, adjusting a sensor clamping mode according to the mode shown in figure 3, and enabling the incident laser beam to be perpendicular to the Z axis. And (3) placing the blade of the aircraft engine into a special blade fixture for fixing and placing the blade on a rotary table of a measuring machine, so that the upper edge of the fixture is parallel to the X axis. Controlling the sensor to move to be positioned at the lower left of the blade profile;
the position and the motion track of the optical knife are shown in fig. 2b, the incident light beam is partially on the blade profile and partially out of the blade profile, a small amount of front and rear edge data can be obtained in the mode, the measurement track is S-shaped, and the sensor returns to the initial position after the measurement is finished.
S202, sequentially rotating the rotary table to-30 degrees, -15 degrees, 30 degrees, 150 degrees, 165 degrees, 180 degrees, 195 degrees and 210 degrees, and respectively measuring 9 positions. At-15 °, 0 °, 15 °, 165 °, 180 ° and 195 ° positions, mainly for acquiring complete leaf basin and leaf back data and a small amount of leading and trailing edge data, and at-30 °, 30 °, 150 ° and 210 ° positions for acquiring more leading and trailing edge data, the clockwise direction is positive and the counterclockwise direction is negative; as shown in fig. 4.
S3, optimizing the measuring path, and improving the measuring efficiency on the basis of realizing accurate full measurement of the blade profile.
In order to further optimize the measurement path, the 10 times of scanning data of step S2 are registered pairwise, the data inclusion relationship in the registration result is analyzed, the measurement path is simplified into 6 times of measurement results, and the measurement path is simplified into the positions where the 6 times of results are located, namely-30 °, 15 °, 30 °, 150 °, 195 ° and 210 °; and respectively measuring at 6 angular positions according to the S-shaped tracks to obtain the optimized measuring path.
In order to further optimize the measuring path, the 10 times of scanning data are subjected to registration analysis, and it can be known that when the blade back profile data is measured, the data splicing results at-30 degrees, 15 degrees and 30 degrees can completely cover the blade back profiles measured at 0 degrees and-15 degrees, and the measuring data at-150 degrees, 195 degrees and 210 degrees of the blade basin part can completely cover the blade profiles measured at 180 degrees and 165 degrees, so the measuring path can be simplified into 6 times of measuring results.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
(1) Determining sensor clamping mode
The blade profile data are acquired in two clamping modes, namely that the light beam direction is parallel to the Z axis (shown in figure 2 a) and the light beam direction is perpendicular to the Z axis (shown in figure 2 b). The measurement result obtained by using a four-stage blade of a compressor of an aeroengine of a certain model as a measurement example is shown in figure 6. Through the result analysis of the acquired data, the original data measured by the mode of fig. 2a has less front and rear edge data of the blade and the edges are not neat enough, which is not beneficial to the subsequent point cloud data processing. A large number of data points of the front edge part and the rear edge part of the blade are obtained by the point cloud data obtained in the mode of fig. 2b, and the point cloud data has tidy boundary information, so that a good data processing effect can be obtained.
(2) Blade profile data measurement path planning
The collected blade profile data is analyzed, and the blade profile data collected at 180 °, 195 °, and 210 ° are exemplified. FIG. 7 is an enlarged detail view of the three position measurements and the trailing edge portion. In fig. 7 it is seen that due to the large degree of blade profile twist, complete blade back data cannot be obtained at one time at the 180 ° position, resulting in a lack at the portion near the trailing edge, while a small amount of lack occurs at the portion near the leading edge in the measurement data at the 195 ° position. The measured data at the trailing edge of the blade is magnified in fig. 7d and 7e, and the profile at the trailing edge cannot be accurately represented with only a few data points. And more complete details of the trailing edge of the blade can be seen in the measured data of the 210-degree position, and the defect of the data of the trailing edge measured in the first two times is made up. Therefore, the path planning method not only can obtain complete leaf basin leaf back data, but also can well solve the problem that the front and rear edge data are difficult to obtain.
(3) Optimization of measurement paths
Referring to fig. 5, the preliminary planning of the measurement path may obtain complete data of the blade profile, but there is a lot of redundant information in the obtained data, and in order to further improve the efficiency of blade profile measurement, the measurement path needs to be optimized to reduce the number of measurements. By registering the 15 ° data and the 0 ° data, it was found that the data at the 15 ° position can completely cover the data at 0 °, and the registration results for the 15 ° and-30 ° data can completely cover the data at-15 °. The leaf basin is similar in that the location of the data at 180 is completely contained in the data at 195, while the 195 and 150 data may completely contain the location where the 165 data was scanned. Therefore, the measurement path is optimized by analyzing the results, and is simplified into 6 measurement results.
TABLE 1 initial Path measurement data volume
Figure BDA0003137057820000111
In table 1, the data amount of 10 measurements in the initial path is calculated, and it is found that if the data amount of 10 measurements is 15236792, the optimized data can be reduced by 7898867 and more than 50%, so that the measurement time can be reduced and the speed of the subsequent processing can be increased.
In summary, according to the method for planning the full-data measurement path of the blade of the aircraft engine, the curvature change of the front and rear edge parts in the blade profile is large, and the measurement of the front and rear edge parts is always a difficult point in the detection of the blade profile. To obtain full data of the blade profile requires designing the data acquisition path for the structural features of the blade profile. The invention provides a path planning method for blade profile collection, which is characterized in that the measurement of the front and rear edge parts in the blade profile is realized by determining the optimal clamping mode of a sensor, and the key problem that the part is difficult to collect data is solved. Secondly, an initial measurement path planning scheme is established through analysis of blade profile characteristics so as to achieve comprehensive measurement of blade profile data. And finally, analyzing the acquired data on the basis of the initial measurement path, and optimizing the measurement path by a registration method to obtain an optimal measurement path scheme. Through simple experimental steps, the high-precision and high-efficiency measurement of the blade profile can be realized, and the detection requirement of the blade profile is met.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.

Claims (9)

1. A method for planning a full-data measurement path of an aircraft engine blade is characterized by comprising the following steps:
s1, determining the clamping mode of the sensor;
s2, mounting the sensor according to the clamping mode of the sensor determined in the step S1, measuring the blade at-30 degrees, -15 degrees, -0 degrees, 15 degrees, 30 degrees, 150 degrees, 165 degrees, 180 degrees, 195 degrees and 210 degrees to obtain scanning data, and planning a measuring path of the blade profile data;
and S3, optimizing the measurement path planned in the step S2, and realizing full data measurement of the blade profile.
2. The method according to claim 1, wherein in step S1, the sensor is clamped such that the sensor laser beam direction is parallel to the Z-axis direction.
3. The method according to claim 1, wherein in step S2, planning the measurement path of the blade profile data is embodied as:
s201, fixing the aero-engine blade on a rotary table through a clamp, wherein the upper edge of the clamp is parallel to the X axis of a blade scanning measuring machine; controlling the sensor to move so that the sensor is positioned at the lower left of the blade profile;
s202, sequentially rotating the rotary table to measure the blades; and acquiring all data of the leaf basin, the leaf back and the front and rear edge parts in a manner of large-area coverage of adjacent data.
4. The method according to claim 3, wherein in step S201, a part of the incident laser beam is on the blade profile, another part is out of the blade profile, and the measuring track of the optical knife is S-shaped.
5. The method according to claim 3, wherein in step S201, a Z-axis column is provided on the bed on the turntable side, and a line scanning probe is provided on the Z-axis column.
6. The method of claim 5, wherein the Z-axis column is provided with an X-axis cross arm and the line scanning probe is provided on the X-axis cross arm.
7. The method of claim 5, wherein the bed is provided with a Y-axis slide and the Z-axis column is provided on the Y-axis slide.
8. The method of claim 3, wherein in step S202, the turret acquires complete leaf basin, leaf back data and leading and trailing edge data at-15 °, 0 °, 15 °, 165 °, 180 ° and 195 ° positions, and leading and trailing edge data at-30 °, 30 °, 150 ° and 210 ° positions.
9. The method according to claim 1, wherein in step S3, the optimized measurement path is specifically:
and performing pairwise registration on the scanning data in the step S2, analyzing the data inclusion relationship in the registration result, simplifying the measurement path into 6 measurement results, and respectively measuring according to the 6 measurement results and the S-shaped track to be used as the optimized measurement path.
CN202110722789.1A 2021-06-28 2021-06-28 Method for planning full-data measurement path of blade of aircraft engine Pending CN113465506A (en)

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Application publication date: 20211001