CN115033999A - Turbine disc inclined tenon groove contour dimension scanning detection and three-dimensional evaluation method and device - Google Patents

Turbine disc inclined tenon groove contour dimension scanning detection and three-dimensional evaluation method and device Download PDF

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CN115033999A
CN115033999A CN202210469248.7A CN202210469248A CN115033999A CN 115033999 A CN115033999 A CN 115033999A CN 202210469248 A CN202210469248 A CN 202210469248A CN 115033999 A CN115033999 A CN 115033999A
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theoretical
contour
profile
point
points
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袁园
李志超
李思晴
庄世宁
周响
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AECC South Industry Co Ltd
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/10—Geometric CAD
    • G06F30/17—Mechanical parametric or variational design
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
    • G01B21/20—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring contours or curvatures, e.g. determining profile
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/10—Geometric CAD
    • G06F30/12—Geometric CAD characterised by design entry means specially adapted for CAD, e.g. graphical user interfaces [GUI] specially adapted for CAD
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/20—Design optimisation, verification or simulation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T19/00—Manipulating 3D models or images for computer graphics
    • G06T19/20—Editing of 3D images, e.g. changing shapes or colours, aligning objects or positioning parts
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2111/00—Details relating to CAD techniques
    • G06F2111/10—Numerical modelling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/20—Hydro energy

Abstract

The application discloses a method and a device for scanning, detecting and three-dimensional evaluating the contour dimension of a turbine disk oblique tenon groove, and the method comprises the following steps: s1, generating a simplified three-dimensional CAD (computer-aided design) digital model of the turbine disc with corresponding indexes according to a drawing, wherein the simplified CAD digital model comprises complete mortise contour CAD data; s2, selecting a mortise surface to be measured in the generated CAD digital model, setting a mortise section according to the requirements of a drawing, generating a theoretical measuring point and a movement intermediate point on the intersecting line of the section to obtain the intersecting line profile of the theoretical section, and finally selecting a sensor and a measuring method; s3, automatically segmenting the theoretical section intersection line outline point cloud data, automatically selecting points related to the actual measurement outline points and the theoretical outline according to the minimum end point distance between the actual measurement outline points and the corresponding theoretical section intersection line outline points in each segment, and accurately evaluating the profile parameters of the inclined tenon groove type surface. The method and the device greatly improve the accuracy of detection and evaluation, have a wide application range and have high market popularization value.

Description

Turbine disc inclined tenon groove contour dimension scanning detection and three-dimensional evaluation method and device
Technical Field
The application relates to the technical field of aeroengine turbines, in particular to a method and a device for scanning, detecting and three-dimensionally evaluating the contour dimension of a turbine disk oblique tenon groove.
Background
The turbine disc is a core component of an aircraft engine and a gas turbine, typical parts comprise a power turbine disc, a gas turbine disc and the like, and the turbine disc is complex in structure and high in machining precision. Particularly, the fir-tree-shaped inclined mortises for installing the blades are designed on the edge of the wheel disc, and the special tool has the characteristics of complex shape, small inner contour size, high requirement on size precision and the like. In the machining process, geometric elements of high-precision contour features of the inclined tenon groove, including tooth pitch, contour degree, rod spanning size (the rod spanning distance is less than 3mm), switching R, symmetry degree, angle, offset and the like, need 100% detection. The requirements on the dimensional accuracy are very high, wherein two parallel surfaces which are symmetrical left and right are working surfaces, the actual working length of the working surfaces is less than 1mm, the distance 3.4621 +/-0.004 between the two working surfaces is a tooth pitch, the switching R is R0.7mm, the tooth surface profile accuracy is 0.012mm, the size is small, the accuracy is high, and the non-perpendicularity of the tongue-and-groove profile and the end surface brings great difficulties for detection.
Currently, the detection method commonly adopted in the industry at present is as follows:
1) the test sample was projected by using an enlarged image and a projector. The projection detection is end surface optical projection, and only straight mortises can be detected. When the inclined mortise is machined, the inclined mortise is machined after a broach test material of the straight groove is detected to be qualified, the machining quality state of the part is indirectly reflected, the part cannot be directly detected, projection detection can only compare a standard enlarged image to judge whether the whole outline is qualified, and specific data of each size cannot be obtained. And the sizes of the profile of the mortise are slightly different due to the inconsistency between the material of the sample and the part.
2) By contact of threeThe coordinate measuring machine measures the inclined mortise. The diameter of the measuring needle with a larger diameter is adopted, the interference scanning cannot pass due to the small switching R, and the measuring needle with a smaller diameter (the diameter is smaller than that of the measuring needle with a smaller diameter)
Figure BDA0003621410080000011
0.8mm) the stylus is extremely prone to breakage due to force measurement.
In addition, because the tooth pitch tolerance of the inclined tenon groove is 0.004mm, the traditional measuring method has more auxiliary tools and generates large accumulated error.
Disclosure of Invention
The embodiment of the application provides a turbine disc inclined mortise contour dimension scanning detection and three-dimensional evaluation method on the one hand, and aims to solve the technical problems that an inclined mortise cannot be directly detected, specific data of each size cannot be obtained, the detection difficulty is high, and the error is large when the existing aeroengine turbine disc small inclined mortise contour dimension scanning detection and evaluation are carried out.
The embodiment of the application adopts the following technical scheme:
a method for scanning, detecting and three-dimensionally evaluating the contour dimension of a turbine disk oblique tenon groove comprises the following steps:
s1, generating a simplified three-dimensional CAD digital model of the turbine disc with corresponding indexes according to the requirement of a design two-dimensional drawing, wherein the simplified CAD digital model comprises complete mortise contour CAD data;
s2, selecting a mortise surface to be measured in the generated CAD digital model, setting a mortise section according to the requirements of a drawing, generating a theoretical measuring point and a movement intermediate point on the intersecting line of the section to obtain the intersecting line profile of the theoretical section, and finally selecting a sensor and a measuring method;
s3, automatically segmenting the theoretical section intersection line outline point cloud data, automatically selecting points related to the actual measurement outline points and the theoretical outline according to the minimum end point distance between the actual measurement outline points and the corresponding theoretical section intersection line outline points in each segment, and accurately evaluating the profile parameters of the inclined tenon groove type surface.
Further, the step 1 specifically includes the steps of:
s11, establishing a simplified theoretical parameter model of the turbine disc by using a parameterized theoretical method, wherein the parameter model comprises complete profile information;
and S12, importing the specific indexes into the parameter model, and generating a simplified CAD digital model of the turbine disc with the corresponding indexes, wherein the simplified CAD digital model comprises complete mortise contour CAD data.
Further, in step S11, when the simplified theoretical parameter model of the turbine disk is built, the open-source CAD core library opencasade is used.
Further, in step S3, when the theoretical cross section intersection line profile point cloud data is segmented automatically, the theoretical cross section intersection line profile point cloud data is divided into circular arc segments or straight line segments.
Further, in step S3, automatically selecting points related to the actual measurement contour point and the theoretical contour according to the minimum end point distance between the actual measurement contour point and the corresponding theoretical section intersection contour point in each segment, and accurately evaluating the profile parameters of the inclined tongue and groove profile, specifically including:
s301, when the point cloud data of the theoretical section intersection line profile is segmented into arc segments, finding out the starting point and the end point of the theoretical section intersection line profile arc segments;
s302, finding out points which are closest to the starting point and the end point in the actual measurement profile respectively;
s303, actually measuring the contour of the inclined mortise, and attributing all points between two points closest to the starting point and the end point to the measured circular arc segment of the actually measured contour for evaluating the measured circular arc segment;
s304, obtaining the best fitting mode by using the Gaussian principle, selecting data points of the measured circular arc segment, fitting a circle, and accurately calculating and evaluating the R value of the circle by using a least square method.
Further, in step S3, automatically selecting points related to the actual measurement contour point and the theoretical contour according to the minimum end point distance between the actual measurement contour point and the corresponding theoretical section intersection contour point in each segment, and accurately evaluating the profile parameters of the inclined tongue and groove profile, specifically including:
s311, when the point cloud data of the theoretical section intersection line profile is segmented into straight line segments, finding out the starting point and the end point of the straight line segments of the theoretical section intersection line profile;
s312, finding out points which are closest to the starting point and the end point in the actual measurement profile respectively;
and S313, actually measuring the contour of the inclined mortise, and attributing all points between two points closest to the starting point and the end point to the measured straight line section of the actually measured contour for calculating and evaluating the relevant parameters of the measured straight line section.
Further, in step S3, automatically selecting points related to the actual measurement contour point and the theoretical contour according to the minimum end point distance between the actual measurement contour point and the corresponding theoretical section intersection contour point in each segment, and accurately evaluating the profile parameters of the inclined tongue and groove profile, the method specifically includes:
s314, selecting a set from the point cloud of the measuring points by the selected measured straight line segment;
s315, finding out two parallel measured straight line segments corresponding to the tooth pitch according to the theoretical model;
and S316, calculating the distance between the two parallel measured straight line segments to obtain the pitch.
The application also provides a turbine disc inclined mortise contour dimension scanning detection and three-dimensional evaluation device, including:
the parameterized modeling module is used for generating a simplified three-dimensional CAD (computer-aided design) digital model of the turbine disc with corresponding indexes according to the requirement of a design two-dimensional drawing, and the simplified CAD digital model comprises complete mortise contour CAD data;
a theoretical point generating and measuring module used for selecting a mortise surface to be measured in the generated CAD digital model, setting a mortise section according to the requirement of a drawing, generating a theoretical measuring point and a movement intermediate point on the intersecting line of the sections to obtain the intersecting line profile of the theoretical sections, and finally selecting a sensor and a measuring method;
and the profile evaluation module is used for automatically segmenting the theoretical section intersection line profile point cloud data, automatically selecting points related to the actual measurement profile points and the theoretical profile according to the minimum endpoint distance between the actual measurement profile points and the corresponding theoretical section intersection line profile points in each segment, and accurately evaluating the profile parameters of the inclined tenon groove profile.
The application also provides an electronic device, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the program to realize the steps of the method for scanning and detecting the contour dimension of the oblique tenon groove of the turbine disk and evaluating the contour dimension of the oblique tenon groove in three dimensions.
The application also provides a storage medium, which comprises a stored program, and when the program runs, the equipment where the storage medium is located is controlled to execute the steps of the turbine disk oblique tenon groove contour dimension scanning detection and three-dimensional evaluation method.
Compared with the prior art, the method has the following beneficial effects:
the application provides a method and a device for scanning, detecting and three-dimensional evaluating the contour dimension of a turbine disc inclined mortise, wherein the method comprises the following steps: step 1, generating a simplified three-dimensional CAD (computer-aided design) digital model of a turbine disc with corresponding indexes according to the requirement of a design two-dimensional drawing, wherein the simplified CAD digital model comprises complete mortise contour CAD data; step 2, selecting a mortise surface to be measured in the generated CAD digital model, setting a mortise section according to the requirements of a drawing, generating a theoretical measuring point and a motion intermediate point on an intersecting line of the section to obtain an intersecting line profile of the theoretical section, and finally selecting a sensor and a measuring method; and 3, automatically segmenting the point cloud data of the intersecting line profile of the theoretical section, automatically selecting points related to the actual measurement profile point and the theoretical profile according to the minimum end point distance between the actual measurement profile point and the corresponding intersecting line profile point of the theoretical section in each segment, and accurately evaluating profile parameters of the inclined tenon groove type surface. According to the method, the theoretical section intersection line contour point cloud data are segmented, two points which are the shortest in distance from two end points corresponding to the segmentation of the theoretical section intersection line contour point in the actual measurement contour points are used as a selection strategy of the actual measurement contour points, the points related to the actual measurement contour points and the theoretical profile are automatically selected, the points required by the measurement result contour point cloud and specific evaluation (such as R and tooth pitch) can be accurately obtained, the detection and evaluation accuracy is greatly improved, when the local data are selected from the point cloud result to evaluate tongue-and-groove profile parameters (such as R and tooth pitch) in the prior art, the local points in the whole contour point cloud are usually selected through a mouse, and complete and correct points are difficult to be manually selected through a frame. In addition, the method has universal applicability, is suitable for detecting and evaluating the profiles and other characteristic dimensions of the inclined mortises of the turbine discs with different sizes, can be extended to the precise dimension detection of small and complex inner molded surfaces such as dovetail type mortises and blade sealing grooves, and has strong popularization value.
In addition to the objects, features and advantages described above, other objects, features and advantages will be apparent from the present application. The present application will now be described in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the application, and the description of the exemplary embodiments of the application are intended to be illustrative of the application and are not intended to limit the application. In the drawings:
fig. 1 is a schematic flow chart of a method for scanning, detecting and three-dimensionally evaluating the contour dimension of a skewed slot of a turbine disk according to a preferred embodiment of the present application.
FIG. 2 is a schematic view of a turbine disk parametric model in accordance with a preferred embodiment of the present application.
FIG. 3 is a schematic diagram of CAD data model generated based on a parametric model in the preferred embodiment of the present application.
FIG. 4 is a schematic diagram of a parameter model editable interface in a preferred embodiment of the application.
FIG. 5 is a schematic diagram of a selected tongue-and-groove surface to be tested in the preferred embodiment of the present application.
FIG. 6 is a schematic cross-sectional view of a setting mortise in a preferred embodiment of the present application.
FIG. 7 is a schematic diagram (under a three-dimensional solid model) of the theoretical point of tongue and groove measurement and the middle point of motion in the preferred embodiment of the present application.
Fig. 8 is a schematic diagram of the selection of sensors and measurement in the preferred embodiment of the present application.
Fig. 9 is a schematic diagram of a conventional point cloud data selection method.
FIG. 10 is a schematic diagram of line segment accurate interception in the preferred embodiment of the present application.
Fig. 11 is a schematic diagram of theoretical line segment points of a circular arc segment in a preferred embodiment of the present application.
Fig. 12 is a schematic diagram of the measurement result points of the circular arc segment in the preferred embodiment of the present application.
FIG. 13 is a schematic illustration of the selection of the pitch of the mortises in the preferred embodiment of the present application.
Figure 14 is a schematic diagram of a theoretical line segment point of a straight line segment in a preferred embodiment of the present application.
FIG. 15 is a schematic illustration of the measurement results points of the straight line segment in the preferred embodiment of the present application.
Figure 16 is a schematic diagram of another straight line segment theoretical line segment point in the preferred embodiment of the present application.
FIG. 17 is a schematic view of the evaluation of pitch in the preferred embodiment of the present application.
FIG. 18 is a schematic illustration of the tongue and groove measurement requirements in the preferred embodiment of the present application.
FIGS. 19-28 are schematic diagrams showing the profile measurement results of the mortise slot profiles 1-10 of the turbine disk (No. 014A) in the preferred embodiment of the present application.
Fig. 29 is an internal structural view of a computer device of the preferred embodiment of the present application.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1, a preferred embodiment of the present application provides a method for scanning, detecting and three-dimensionally evaluating a contour dimension of a diagonal mortise of a turbine disk, including the steps of:
s1, generating a simplified three-dimensional CAD digital model of the turbine disc with corresponding indexes according to the design two-dimensional drawing requirement, wherein the simplified CAD digital model comprises complete mortise contour CAD data;
s2, selecting a mortise surface to be measured in the generated CAD digital model (see figure 5), setting a mortise section according to the requirements of a drawing (see figure 6), generating a theoretical measuring point and a movement middle point on an intersecting line of the sections to obtain a theoretical section intersecting line profile (see figure 7), and finally selecting a sensor and a measuring method (see figure 8);
s3, automatically segmenting the theoretical section intersection line outline point cloud data, automatically selecting points related to the actual measurement outline points and the theoretical outline according to the minimum end point distance between the actual measurement outline points and the corresponding theoretical section intersection line outline points in each segment, and accurately evaluating the profile parameters of the inclined tenon groove type surface.
The embodiment provides a method for scanning, detecting and three-dimensionally evaluating the contour dimension of a skewed slot of a turbine disk, which comprises the following steps: step 1, generating a simplified three-dimensional CAD (computer-aided design) digital model of a turbine disc with corresponding indexes according to the requirement of a design two-dimensional drawing, wherein the simplified CAD digital model comprises complete mortise contour CAD data; step 2, selecting a mortise surface to be measured in the generated CAD digital model, setting a mortise section according to the requirements of a drawing, generating a theoretical measuring point and a motion intermediate point on an intersecting line of the section to obtain an intersecting line profile of the theoretical section, and finally selecting a sensor and a measuring method; and 3, automatically segmenting the point cloud data of the intersecting line profile of the theoretical section, automatically selecting points related to the actual measurement profile point and the theoretical profile according to the minimum end point distance between the actual measurement profile point and the corresponding intersecting line profile point of the theoretical section in each segment, and accurately evaluating profile parameters of the inclined tenon groove type surface. According to the method, the theoretical section intersection line profile point cloud data are segmented, two points which are the shortest in distance from two end points of the actual measurement profile points to the corresponding theoretical section intersection line profile point segmentation are used as a selection strategy of the actual measurement profile points, the points related to the actual measurement profile points and the theoretical profile are automatically selected, the points required by the measurement result profile point cloud and specific assessment (such as R and tooth pitch) can be accurately obtained, and the accuracy of detection and assessment is greatly improved. However, in the prior art, when local data is selected from a point cloud result to evaluate tongue and groove profile parameters (such as R and pitch), a mouse is usually used to frame local points in the overall contour point cloud, and it is difficult to manually frame and select complete and correct points. Meanwhile, the embodiment has universal applicability, is suitable for detecting and evaluating the profile and other characteristic dimensions of the inclined mortises of the turbine disc with different sizes, can be extended to the precise dimension detection of small and complex inner molded surfaces such as dovetail type mortises and blade sealing grooves, and has strong popularization value.
In a preferred embodiment of the present application, the step 1 specifically includes the steps of:
s11, establishing a simplified theoretical parameter model of the turbine disc by using an open-source CAD core library OPENCCASCADE and a parameterized theoretical method, wherein the parameter model comprises complete profile information (see figure 2);
and S12, importing the specific indexes into the parameter model, and generating a simplified CAD digital model of the turbine disc with the corresponding indexes, wherein the simplified CAD digital model comprises complete mortise contour CAD data (see figure 3).
For example, a certain type of turbine disk as shown in fig. 4, the model has 22 parameters (according to the two-dimensional design drawing requirements) which can be customized. The first column of the left table in the interface is the parameter code number, the second column is the value before the parameter number, and the third column is the description of the parameter and the meaning of the parameter. Double clicking the row where the parameter is located can modify the parameter. After the editing is finished, a CAD simplified digital model (containing complete tongue-and-groove profile information) of the specified index can be generated as required.
In a preferred embodiment of the present application, in step S3, when automatically segmenting the theoretical cross-section intersection line profile point cloud data, the theoretical cross-section intersection line profile point cloud data is divided into circular arc segments or straight line segments.
The traditional evaluation method selects local data from the overall contour measurement point cloud result to evaluate the parameters (such as R and tooth pitch) of the tongue-and-groove profile. It is difficult to manually "box" out complete and correct points, usually by mouse-framing local points in the global contour point cloud. Different positions and sizes of the "box" will bring about widely different resulting data (e.g., R and pitch). As shown in fig. 9, there are two marquees and different straight line segments can be evaluated from different point data. In the application, the contour in the theoretical data is changed into an accurate 'frame' so as to accurately acquire the point cloud of the measuring result contour and the points required by specific evaluation (such as R and tooth pitch).
In the application, the contour in the theoretical data is changed into an accurate 'frame' so as to accurately obtain the point cloud of the contour point of the measuring result and the points required by specific evaluation (such as R and tooth pitch), and the specific method is as follows:
and generating a tongue-and-groove profile curved surface based on theoretical data, and generating a two-dimensional intersecting line profile after the profile curved surface and the specified cross section are intersected, wherein the profile is the two-dimensional theoretical profile of the tongue-and-groove profile. The tongue and groove profile is typically a combination of a plurality of cylindrical and planar surfaces. The intersecting line profile is typically a combination of circular arcs or straight line segments. In the three-dimensional CAD environment, the selection of the specific intersecting line can be realized. The entire curve shown in fig. 10 is a theoretical intersecting cross-sectional profile, wherein the theoretical intersecting cross-sectional profile includes circular arc end segments and straight line segments.
The following describes the precise interception of the arc segment and the evaluation process of the actual R of the arc. The invention automatically selects the points related to the actual measurement contour point and the theoretical contour by developing in a three-dimensional CAD environment.
In the preferred embodiment of the present application, a specific selection method is described by taking a circular arc segment in fig. 11 as an example. In step S3, automatically selecting points related to the actual measurement contour point and the theoretical contour according to the minimum end point distance between the actual measurement contour point and the corresponding theoretical cross-section intersection contour point in each segment, and accurately evaluating the profile parameters of the profile of the tongue-and-groove profile, specifically including:
s301, when the point cloud data of the theoretical section intersection line profile is segmented into arc segments, finding out a starting point (A-1) and an end point (A-2) of the theoretical section intersection line profile arc segments;
s302, respectively finding out a point (B-1) and a point (B-2) which are closest to the starting point (A-1) and the end point (A-2) in the actual measurement profile (see figure 12);
s303, actually measuring the contour of the inclined mortise, and attributing all points between a point (B-1) and a point (B-2) which are nearest to the starting point and the end point to the measured circular arc segment of the actually measured contour so as to evaluate the measured circular arc segment;
s304, obtaining the best fitting mode by using the Gaussian principle, selecting data points of the measured circular arc segment, fitting a circle, and accurately calculating and evaluating the R value of the circle by using a least square method.
The following describes the precise interception and pitch measurement evaluation process of two parallel straight line segments as shown in fig. 13.
In a preferred embodiment of the present application, in step S3, automatically selecting a point related to the actual measurement contour point and the theoretical contour according to the minimum end point distance between the actual measurement contour point and the corresponding theoretical section intersection contour point in each segment, and precisely evaluating the profile parameter of the chase profile specifically includes:
s311, when the point cloud data of the theoretical section intersection line profile is segmented into straight line segments, finding out a starting point (A1-1) and an end point (A1-2) of the straight line segments of the theoretical section intersection line profile (see figure 14);
s312, finding out a point (B1-1) and a point (B1-2) which are closest to the starting point (A1-1) and the end point (A1-2) in the actual measurement profile (see figure 15);
and S313, actually measuring the contour of the oblique mortise, and attributing all points between the point (B1-1) and the point (B1-2) which are closest to the starting point and the end point to a measured straight line segment B1 of the actually measured contour for calculating and evaluating relevant parameters of the measured straight line segment.
Correspondingly, for another measured straight line segment B2, the selected steps are similar to those of the measured straight line segment B1, and specifically include:
s311, when the point cloud data of the theoretical section intersection line profile is segmented into straight line segments, finding out a starting point (A2-1) and an end point (A2-2) of the straight line segments of the theoretical section intersection line profile (see figure 16);
s312, finding out a point (B2-1) and a point (B2-2) which are closest to the starting point (A2-1) and the end point (A2-2) in the actual measurement profile respectively;
and S313, actually measuring the contour of the oblique mortise, and attributing all points between the point (B2-1) and the point (B2-2) which are closest to the starting point and the end point to a measured straight line segment B2 of the actually measured contour for calculating and evaluating relevant parameters of the measured straight line segment.
In a preferred embodiment of the present application, in step S3, automatically selecting points related to the actual measured contour point and the theoretical profile according to a minimum end point distance between the actual measured contour point and a corresponding theoretical section intersection contour point in each segment, and accurately evaluating a profile parameter of the chase profile, further includes:
s314, selecting a set from the point clouds of the measuring points by the selected measured straight line segments;
s315, finding out two parallel measured straight line segments B1 and B2 corresponding to the tooth pitch according to a theoretical model;
and S316, calculating the distance between two parallel measured straight line segments B1 and B2 to obtain the pitch.
In the embodiment, the pitch can be accurately estimated by using the two estimated measured straight line segments (B1, B2) (see fig. 17) during automatic estimation of the pitch, that is, the selected line segment is selected from a point cloud of a measuring point, and then two parallel line segments (B1, B2) corresponding to the pitch are found according to a theoretical model, wherein the distance between the two parallel line segments is the pitch.
The measurement results of the profile of the mortise groove profiles of the turbine disk (No. 014A) No. 1 to No. 10 shown in FIG. 18 by using the method of the above embodiment are shown in FIGS. 19 to 28.
The application also provides a turbine disc inclined mortise contour dimension scanning detection and three-dimensional evaluation device, include:
the parameterized modeling module is used for generating a simplified three-dimensional CAD (computer-aided design) digital model of the turbine disc with corresponding indexes according to the requirement of a design two-dimensional drawing, and the simplified CAD digital model comprises complete mortise contour CAD data;
a theoretical point generating and measuring module used for selecting a mortise surface to be measured in the generated CAD digital model, setting a mortise section according to the requirement of a drawing, generating a theoretical measuring point and a movement intermediate point on the intersecting line of the sections to obtain the intersecting line profile of the theoretical sections, and finally selecting a sensor and a measuring method;
and the profile evaluation module is used for automatically segmenting the point cloud data of the theoretical section intersection line profile, automatically selecting points related to the actual measurement profile points and the theoretical profile according to the minimum endpoint distance between the actual measurement profile points and the corresponding theoretical section intersection line profile points in each segment, and accurately evaluating the profile parameters of the inclined tenon groove profile.
All modules in the device for scanning, detecting and three-dimensional evaluating the overall dimension of the oblique tenon groove of the turbine disk can be completely or partially realized by software, hardware and a combination thereof. The modules can be embedded in a hardware mode or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software mode, so that the processor can call and execute the virtual operation of the modules.
The preferred embodiment of the present application provides an electronic device, which includes a memory, a processor, and a computer program stored on the memory and executable on the processor, and when the processor executes the program, the processor implements the method for detecting and three-dimensionally evaluating the scan of the profile dimensions of the oblique tenon groove of the turbine disk in the above embodiments.
As shown in fig. 29, the preferred embodiment of the present application also provides a computer device, which may be a terminal or a server, including a processor, a memory, and a network interface connected through a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The network interface of the computer device is used for communicating with other external computer devices through network connection. The computer program is executed by a processor to realize the scanning detection and three-dimensional evaluation method for the contour dimension of the inclined tenon groove of the turbine disk.
The preferred embodiment of the present application further provides a storage medium, where the storage medium includes a stored program, and when the program runs, the apparatus where the storage medium is located is controlled to execute the method for detecting and three-dimensionally evaluating the scan of the profile dimensions of the oblique tenon groove of the turbine disk in the foregoing embodiment.
The preferred embodiments of the present application further provide a computer program product or a computer program, where the computer program product or the computer program includes computer program code, the computer program code is stored in a computer readable storage medium, a processor of the computer device reads the computer program code from the computer readable storage medium, and the processor executes the computer program code, so that the computer device implements the operations performed in the turbine disk diagonal mortise contour dimension scanning detection and three-dimensional evaluation method as described in the above embodiments.
It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than presented herein.
The above description is only for the purpose of illustrating the preferred embodiments of the present application and is not to be construed as limiting the present application, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present application should be included in the scope of the present application.

Claims (10)

1. A method for scanning, detecting and three-dimensionally evaluating the contour dimension of a turbine disk oblique tenon groove is characterized by comprising the following steps:
s1, generating a simplified three-dimensional CAD digital model of the turbine disc with corresponding indexes according to the requirement of a design two-dimensional drawing, wherein the simplified CAD digital model comprises complete mortise contour CAD data;
s2, selecting a mortise surface to be measured in the generated CAD digital model, setting a mortise section according to the requirements of a drawing, generating a theoretical measuring point and a movement intermediate point on the intersecting line of the section to obtain the intersecting line profile of the theoretical section, and finally selecting a sensor and a measuring method;
s3, automatically segmenting the theoretical section intersection line outline point cloud data, automatically selecting points related to the actual measurement outline points and the theoretical outline according to the minimum end point distance between the actual measurement outline points and the corresponding theoretical section intersection line outline points in each segment, and accurately evaluating the profile parameters of the inclined tenon groove type surface.
2. The method for scanning, detecting and three-dimensionally evaluating the contour dimension of the inclined mortise and tenon groove of the turbine disc according to claim 1, wherein the step 1 specifically comprises the steps of:
s11, establishing a simplified theoretical parameter model of the turbine disc by using a parameterized theoretical method, wherein the parameter model comprises complete profile information;
and S12, importing the specific indexes into the parameter model, and generating a simplified CAD digital model of the turbine disc with the corresponding indexes, wherein the simplified CAD digital model comprises complete mortise contour CAD data.
3. The method for scanning, detecting and three-dimensional evaluating the contour dimension of the bevel tenon groove of the turbine disk as claimed in claim 2, wherein in step S11, an open-source CAD core library opencasade is used when the simplified theoretical parameter model of the turbine disk is established.
4. The method for scanning, detecting and three-dimensional evaluating the contour dimension of the diagonal mortise and tenon of the turbine disk as claimed in claim 1, wherein in the step S3, when the point cloud data of the theoretical cross-sectional intersection line is segmented automatically, the point cloud data of the theoretical cross-sectional intersection line is divided into arc segments or straight segments.
5. The turbine disk mortise contour dimension scanning detection and three-dimensional evaluation method according to claim 4, wherein in step S3, points related to the actual measured contour point and the theoretical contour are automatically selected according to the minimum end point distance between the actual measured contour point and the corresponding theoretical section intersection contour point in each segment, so as to accurately evaluate the contour parameters of the mortise profile, specifically comprising:
s301, when the point cloud data of the theoretical section intersection line profile is segmented into arc segments, finding out the starting point and the end point of the theoretical section intersection line profile arc segments;
s302, finding out points which are closest to the starting point and the end point in the actual measurement profile respectively;
s303, actually measuring the contour of the inclined mortise, and attributing all points between two points closest to the starting point and the end point to the measured circular arc segment of the actually measured contour for evaluating the measured circular arc segment;
s304, obtaining the best fitting mode by using the Gaussian principle, selecting data points of the measured circular arc segment, fitting a circle, and accurately calculating and evaluating the R value of the circle by using a least square method.
6. The turbine disk mortise contour dimension scanning detection and three-dimensional evaluation method according to claim 4, wherein in step S3, points related to the actual measured contour point and the theoretical contour are automatically selected according to the minimum end point distance between the actual measured contour point and the corresponding theoretical section intersection contour point in each segment, so as to accurately evaluate the contour parameters of the mortise profile, specifically comprising:
s311, when the point cloud data of the theoretical section intersection line profile is segmented into straight line segments, finding out the starting point and the end point of the straight line segments of the theoretical section intersection line profile;
s312, finding out points which are closest to the starting point and the end point in the actual measurement profile respectively;
and S313, actually measuring the contour of the inclined mortise, and attributing all points between two points closest to the starting point and the end point to the measured straight line section of the actually measured contour for calculating and evaluating the relevant parameters of the measured straight line section.
7. The turbine disk mortise contour dimension scanning detection and three-dimensional evaluation method according to claim 6, wherein in step S3, points related to the actual measured contour point and the theoretical profile are automatically selected according to the minimum end point distance between the actual measured contour point and the corresponding theoretical section intersection contour point in each segment, so as to accurately evaluate contour parameters of the mortise profile, and the method further comprises:
s314, selecting a set from the point cloud of the measuring points by the selected measured straight line segment;
s315, finding out two parallel measured straight line segments corresponding to the tooth pitch according to the theoretical model;
and S316, calculating the distance between the two parallel measured straight line segments to obtain the tooth pitch.
8. The utility model provides a turbine disk oblique tenon groove profile size scanning detects and three-dimensional evaluation device which characterized in that includes:
the parameterized modeling module is used for generating a simplified three-dimensional CAD (computer-aided design) digital model of the turbine disc with corresponding indexes according to the requirement of a design two-dimensional drawing, and the simplified CAD digital model comprises complete mortise contour CAD data;
a theoretical point generating and measuring module used for selecting a mortise surface to be measured in the generated CAD digital model, setting a mortise section according to the requirement of a drawing, generating a theoretical measuring point and a movement intermediate point on the intersecting line of the sections to obtain the intersecting line profile of the theoretical sections, and finally selecting a sensor and a measuring method;
and the profile evaluation module is used for automatically segmenting the point cloud data of the theoretical section intersection line profile, automatically selecting points related to the actual measurement profile points and the theoretical profile according to the minimum endpoint distance between the actual measurement profile points and the corresponding theoretical section intersection line profile points in each segment, and accurately evaluating the profile parameters of the inclined tenon groove profile.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the steps of the method for scan detection and three-dimensional evaluation of the profile dimensions of the beveled dovetail groove of the turbine disk as claimed in any one of claims 1 to 7 when executing the program.
10. A storage medium including a stored program, characterized in that,
controlling the device where the storage medium is located to execute the steps of the turbine disk beveled tenon groove contour dimension scanning detection and three-dimensional evaluation method according to any one of claims 1 to 7 when the program is run.
CN202210469248.7A 2022-04-28 2022-04-28 Turbine disc inclined tenon groove contour dimension scanning detection and three-dimensional evaluation method and device Pending CN115033999A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116429047A (en) * 2023-05-04 2023-07-14 扬州保来得科技实业有限公司 Gear profile measuring and evaluating method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116429047A (en) * 2023-05-04 2023-07-14 扬州保来得科技实业有限公司 Gear profile measuring and evaluating method
CN116429047B (en) * 2023-05-04 2023-10-13 扬州保来得科技实业有限公司 Gear profile measuring and evaluating method

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