Positioning deviation compensation member for blade roughness measurement and compensation method thereof

Abstract

This invention provides a positioning deviation compensation component and its compensation method for blade roughness measurement. The positioning deviation compensation component includes a tenon, a truss, and a blade body. The truss is mounted on the tenon, and the blade body is mounted on the truss. The upper and lower surfaces of the tenon are parallel, and the front and rear surfaces are parallel, with the upper and lower surfaces and the front and rear surfaces corresponding to each other perpendicularly. The two side surfaces of the tenon are symmetrical. This invention realizes the calculation and compensation of blade surface positioning deviation, solves the problem of inaccurate positioning during positioning measurement, and improves measurement accuracy.

Description

Technical Field

[0001] This invention relates to the field of surface roughness measurement of aero-engine blades, and particularly to a positioning deviation compensation component and its compensation method for blade roughness measurement. Background Technology

[0002] As the most important core component of an engine, aero-engine blades have complex shapes, large bends and twists, and complex processing techniques. The surface finish of their blades directly affects the engine's operational safety and efficiency, and to a large extent determines the engine's performance.

[0003] The surface quality of a blade depends on its surface morphology, and roughness is an important indicator parameter of surface morphology, used to characterize the micro-geometric errors of the surface. Good blade surface roughness can make the stress distribution on the blade surface more uniform, reduce stress concentration and the occurrence of microcracks, thereby effectively improving the fatigue life of the blade. In addition, it can make the blade profile smoother, which is beneficial to reducing the wind resistance on the blade surface and greatly improving the aerodynamic performance and operating efficiency of the blade. Therefore, it is necessary to detect and control the surface roughness of aero-engine blades.

[0004] With technological advancements, optical 3D measurement technology has been gradually applied to the field of surface roughness measurement, expanding roughness measurement from two-dimensional line measurement to three-dimensional surface measurement. Conventional optical 3D measurement equipment is mainly used to measure simple, regular surfaces such as planes and spheres. For irregular and complex curved surfaces like blades, additional positioning functions are needed to accurately measure specific locations on the blade surface.

[0005] When performing positioning measurements at a specified location on the blade surface, the actual positioning position may deviate from the theoretical movement position due to the influence of fixtures, clamping process, etc., which affects the measurement results.

[0006] In view of this, the inventors of this application have designed a positioning deviation compensation component and a compensation method for measuring blade roughness, in order to overcome the above-mentioned technical problems. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to overcome the defects in the prior art, such as the deviation between the actual positioning position and the theoretical movement position when performing positioning measurement on a specified position on the blade surface, which affects the measurement results, and to provide a positioning deviation compensation component and the compensation method for blade roughness measurement.

[0008] The present invention solves the above-mentioned technical problems through the following technical solution:

[0009] A positioning deviation compensation component for measuring blade roughness, characterized in that the positioning deviation compensation component includes a tenon, a sill plate, and a blade body, wherein the sill plate is mounted on the tenon, and the blade body is mounted on the sill plate;

[0010] The top and bottom surfaces of the tenon are parallel, the front and back surfaces are parallel, and the top and bottom surfaces and the front and back surfaces are perpendicular to each other. The two side surfaces of the tenon are symmetrical.

[0011] According to one embodiment of the present invention, the two side surfaces of the tenon protrude outward and have a 90-degree included angle.

[0012] According to one embodiment of the present invention, the rafter is a cuboid, and the upper and lower surfaces of the rafter are parallel to the upper and lower surfaces of the tenon, and the front and rear surfaces of the rafter are parallel to the front and rear surfaces of the tenon.

[0013] According to one embodiment of the present invention, the blade extends from a cross section in a direction perpendicular to the upper and lower surfaces of the tenon.

[0014] According to one embodiment of the present invention, the cross section includes a convex surface, a concave surface, a leading edge, and a trailing edge that surround each other, the leading edge being parallel to the front surface of the truss, and the trailing edge being parallel to the rear surface of the truss.

[0015] According to one embodiment of the present invention, the convex surface and the concave surface are two cylindrical surfaces.

[0016] According to one embodiment of the present invention, the tenon, the rafter, and the blade are made of wear-resistant metal material.

[0017] The present invention also provides a positioning deviation compensation method for blade roughness measurement, characterized in that the positioning deviation compensation method adopts the positioning deviation compensation component for blade measurement as described above, and the positioning deviation compensation method includes: selecting an edge point on the top surface of the blade as a compensation reference point, positioning to the compensation reference point, taking the position of the compensation reference point in the field of view as the initial position A, and recording the grating values ​​in the X and Y directions at this time;

[0018] Manually move the X and Y directions to bring the compensation reference point to the center position B of the field of view, and record the raster values ​​in the X and Y directions at this time; use the difference between the center position B and the initial position A in the X and Y directions as the compensation values ​​in the X and Y directions, respectively, and input them into the compensation algorithm to automatically complete the compensation correction operation.

[0019] The positive and progressive effects of this invention are as follows:

[0020] This invention relates to a positioning deviation compensation component and its compensation method for blade roughness measurement. It realizes the calculation and compensation of positioning deviation on the blade surface, solves the problem of inaccurate positioning during positioning measurement, and improves measurement accuracy. Attached Figure Description

[0021] The above and other features, properties and advantages of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings and embodiments, in which the same reference numerals always denote the same features, wherein:

[0022] Figure 1 This is a schematic diagram of the positioning deviation compensation component for blade roughness measurement according to the present invention.

[0023] Figure 2 This is a top view of the positioning deviation compensation component for blade roughness measurement according to the present invention.

[0024] Figure 3 This is a schematic diagram of the positioning deviation compensation method for blade roughness measurement according to the present invention.

[0025] [Attached image labels]

[0026] Tenon 10

[0027] 20 rafters

[0028] Leaf 30

[0029] The top and bottom surfaces 11

[0030] Two surfaces, front and back, 12

[0031] Two side surfaces 13

[0032] Upper and lower surfaces 21

[0033] Front and rear surfaces 22

[0034] Convex surface 31

[0035] Concave 32

[0036] Leading edge 33

[0037] Tail edge 34

[0038] Edge point 40 Detailed Implementation

[0039] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0040] Embodiments of the invention will now be described in detail with reference to the accompanying drawings. Preferred embodiments of the invention will now be described in detail, examples of which are shown in the drawings. Wherever possible, the same reference numerals will be used in all the drawings to denote the same or similar parts.

[0041] Furthermore, although the terminology used in this invention is selected from commonly known and used terms, some terms mentioned in this specification may have been selected by the applicant in his or her judgment, and their detailed meanings are explained in the relevant sections of the description herein.

[0042] Furthermore, the invention should be understood not only through the actual terminology used, but also through the meaning implied by each term.

[0043] like Figure 1 and Figure 2 As shown, this invention discloses a positioning deviation compensation component for measuring blade roughness, comprising a tenon 10, a truss 20, and a blade 30. The truss 20 is mounted on the tenon 10, and the blade 30 is mounted on the truss 20. The upper and lower surfaces 11 of the tenon 10 are parallel, and the front and rear surfaces 12 are parallel, and the upper and lower surfaces 11 and the front and rear surfaces 12 are perpendicular to each other. In addition, the two side surfaces 13 of the tenon 10 are symmetrical.

[0044] Preferably, the two side surfaces 13 of the tenon 10 protrude outwards and have a 90-degree angle.

[0045] Preferably, the rafter 20 is configured as a cuboid, and the upper and lower surfaces 21 of the rafter 20 are parallel to the upper and lower surfaces 11 of the tenon 10, and the front and rear surfaces 22 of the rafter 20 are parallel to the front and rear surfaces of the tenon 10.

[0046] More preferably, the blade 30 extends from a cross section in a direction perpendicular to the upper and lower surfaces of the tenon 10.

[0047] The cross-section described herein includes a convex surface 31, a concave surface 32, a leading edge 33, and a trailing edge 34 that enclose each other. The leading edge 33 is parallel to the front surface of the truss plate 20 at a distance of L1. The trailing edge 34 is parallel to the rear surface of the truss plate 20 at a distance of L2.

[0048] Furthermore, the convex surface 31 and the concave surface 32 are preferably two cylindrical surfaces. The tenon 10, the truss 20, and the blade 30 are made of wear-resistant metal material.

[0049] The present invention also provides a positioning deviation compensation method for blade roughness measurement, which adopts the positioning deviation compensation component for blade measurement as described above. The positioning deviation compensation method includes: selecting an edge point 40 on the top surface of the blade as a compensation reference point, positioning the compensation reference point, taking the position of the compensation reference point in the field of view as the initial position A, and recording the grating values ​​in the X and Y directions at this time.

[0050] Manually move the X and Y directions until the compensation reference point reaches the center position B of the field of view, and record the raster values ​​in the X and Y directions at this time. Use the differences between the center position B and the initial position A in the X and Y directions as the compensation values ​​in the X and Y directions, respectively, and input them into the compensation algorithm to automatically complete the compensation correction operation.

[0051] This invention provides a positioning deviation compensation method for blade roughness measurement. Based on the blade shape, a compensation component and a compensation method for positioning deviation are designed. The amount of deviation to be compensated is calculated through the edge points on the compensation component, and the deviation is compensated through a compensation algorithm.

[0052] In summary, the positioning deviation compensation component and its compensation method for blade roughness measurement of the present invention realize the calculation and compensation of positioning deviation on the blade surface, solve the problem of inaccurate positioning during positioning measurement, and improve the measurement accuracy.

[0053] For those skilled in the art, the above disclosure is merely illustrative and does not constitute a limitation of this application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this application. Such modifications, improvements, and corrections are suggested in this application and therefore remain within the spirit and scope of the exemplary embodiments of this application.

[0054] Furthermore, this application uses specific terms to describe embodiments of the application. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic related to at least one embodiment of the application. Therefore, it should be emphasized and noted that "an embodiment," "one embodiment," or "an alternative embodiment" mentioned twice or more in different locations in this specification do not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of the application can be appropriately combined.

[0055] Similarly, it should be noted that, in order to simplify the description of the embodiments disclosed in this application and thus aid in the understanding of one or more embodiments of the invention, the foregoing description of the embodiments of this application sometimes combines multiple features into a single embodiment, drawing, or description thereof. However, this disclosure method does not imply that the subject matter of this application requires more features than those mentioned in the claims. In fact, the embodiments have fewer features than all the features of a single embodiment disclosed above. Some embodiments use numbers describing the number of components or attributes; it should be understood that such numbers used in the description of embodiments are modified in some examples by the terms "approximately," "about," or "generally."

[0056] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A positioning deviation compensation component for measuring blade roughness, characterized in that, For measuring blade roughness using optical three-dimensional measuring equipment, the positioning deviation compensation component includes a tenon, a sill, and a blade body, with the sill mounted on the tenon and the blade body mounted on the sill. The top and bottom surfaces of the tenon are parallel, the front and back surfaces are parallel, and the top and bottom surfaces and the front and back surfaces are perpendicular to each other. The two side surfaces of the tenon are symmetrical. The two side surfaces of the tenon protrude outwards and have a 90-degree angle. The rafter is a cuboid, and the upper and lower surfaces of the rafter are parallel to the upper and lower surfaces of the tenon, and the front and rear surfaces of the rafter are parallel to the front and rear surfaces of the tenon. The blade extends from a cross section along a direction perpendicular to the upper and lower surfaces of the tenon; The cross-section includes a convex surface, a concave surface, a leading edge, and a trailing edge that enclose each other. The leading edge is parallel to the front surface of the truss, and the trailing edge is parallel to the front surface of the truss. The convex surface and the concave surface are two cylindrical surfaces.

2. The positioning deviation compensation component for blade measurement as described in claim 1, characterized in that, The tenon, the truss, and the blade are made of wear-resistant metal materials.

3. A positioning deviation compensation method for blade roughness measurement, characterized in that, The positioning deviation compensation method uses the positioning deviation compensation component for blade measurement as described in any one of claims 1-2. The positioning deviation compensation method includes: selecting an edge point on the top surface of the blade as a compensation reference point, positioning the compensation reference point, taking the position of the compensation reference point in the field of view as the initial position A, and recording the grating values ​​in the X and Y directions at this time. Manually move the X and Y directions to bring the compensation reference point to the center position B of the field of view, and record the raster values ​​in the X and Y directions at this time; use the difference between the center position B and the initial position A in the X and Y directions as the compensation values ​​in the X and Y directions, respectively, and input them into the compensation algorithm to automatically complete the compensation correction operation.

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