Measuring tool structure for measuring complex end face profile of aero-engine stator blade

Abstract

The present application belongs to the technical field of aero blade detection, and particularly relates to a measuring tool structure for measuring the complex end face profile of an aero engine stator blade profile, which solves the problem that when a three-coordinate measuring machine is used for measurement, not only a special positioning measuring tool is needed, but also a large measurement error is caused by the deviation between the actual position and the theoretical position. The special feature of the measuring tool structure is that it comprises a bottom plate, a fixing assembly, an angle pad block, a profile profiling block, a reference column and a measuring table block; the fixing assembly is arranged on the bottom plate and used for fixing the stator blade to be detected above the bottom plate; the angle pad block is fixedly arranged on the upper surface of the bottom plate and used for providing an installation plane perpendicular to the surface to be detected for the profile profiling block; the profile profiling block is fixedly arranged on the upper surface of the bottom plate perpendicular to the surface to be detected or on the upper surface of the angle pad block, and the profiling surface of the profile profiling block is perpendicular to the installation plane of the profile profiling block; and the reference column is arranged vertically on the upper surface of the bottom plate.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of aviation blade detection, and particularly relates to a measuring tool structure for measuring the complex end surface profile of a stator blade of an aero-engine. BACKGROUND

[0002] With the development of technology, the three-dimensional blade profile surface is becoming more and more complex. For the measurement of the end surface profile of many stator blade profiles, the measurement has been changed from the original simple and single planar linear dimension measurement to the measurement of the multi-segment dihedral angle planar profile formed by rotating a plurality of straight lines at a certain angle around the rotation center of the blade profile. Meanwhile, the position to be measured is located on the end surface of the blade profile, and the measurement space itself is very narrow. Moreover, since the precision forged blade profile is twisted to a certain extent relative to the theoretical model, the actual position machined on the narrow surface will deviate from the theoretical position when the model is established. If a three-coordinate measuring machine is used for measurement, not only a special positioning measuring tool is needed, but also a large measurement error will be caused due to the deviation between the actual position and the theoretical position. However, the stator blade of the aero-engine is generally produced in large quantities, so whether a measuring tool for quickly and accurately measuring such a size can be designed becomes the key to stably ensuring the quality of the size, and is also conducive to ensuring the quality of the final product and improving the production efficiency. SUMMARY

[0003] The purpose of the present application is to provide a measuring tool structure for measuring the complex end surface profile of a stator blade of an aero-engine, so as to solve the technical problem that when the three-coordinate measuring machine is used for measurement, not only a special positioning measuring tool is needed, but also a large measurement error will be caused due to the deviation between the actual position and the theoretical position.

[0004] The technical solution adopted by the present application is a measuring tool structure for measuring the complex end surface profile of a stator blade of an aero-engine, which is characterized in that:

[0005] The measuring tool structure comprises a bottom plate, a fixing assembly, an angle pad, a profile profiling block, a reference column and a measuring table block.

[0006] The fixing assembly is arranged on the bottom plate and used for fixing the stator blade to be detected above the bottom plate to limit the six degrees of freedom of the stator blade to be detected.

[0007] The angle pad is fixedly arranged on the upper surface of the bottom plate and used for providing an installation plane perpendicular to the curve to be detected for the profile profiling block when the curve to be detected on the end surface of the stator blade is not perpendicular to the upper surface of the bottom plate after the stator blade is fixed on the fixing assembly.

[0008] The profile copying block is fixedly installed on the upper surface of the bottom plate or the upper surface of the angle spacer, and the profile copying surface of the profile copying block is perpendicular to the installation plane of the profile copying block; the position of the profile copying block on the installation plane of the profile copying block is determined by the projection position of the curved surface to be detected on the installation plane of the profile copying block;

[0009] The reference column is vertically arranged on the upper surface of the bottom plate and used for correcting the "0" position of the measuring table block.

[0010] The measuring table block comprises a dial indicator and coaxial cylindrical probes A and B; during detection, the measuring table block body moves on the installation plane of the profile copying block, the lower probe B of the measuring table block moves on the profile copying surface of the profile copying block, and the upper probe A moves on the curved surface to be detected, and the dial indicator displays the deviation value.

[0011] Further, the fixing assembly comprises a V-shaped block assembly, a hinge clamping device and a torsion angle positioning device.

[0012] The V-shaped block assembly is used for limiting the two movement degrees of freedom of the stator blade to be detected in the horizontal axis and the vertical axis directions parallel to the upper surface of the bottom plate, and the two rotation degrees of freedom of rotation around the horizontal axis parallel to the upper surface of the bottom plate and rotation around the vertical axis perpendicular to the upper surface of the bottom plate.

[0013] The hinge clamping device and the V-shaped block assembly jointly limit the movement degree of freedom of the stator blade to be detected in the vertical axis direction perpendicular to the upper surface of the bottom plate.

[0014] The torsion angle positioning device is used for limiting the rotation degree of freedom of the stator blade to be detected around the vertical axis parallel to the upper surface of the bottom plate.

[0015] Further, the V-shaped block assembly comprises two V-shaped blocks.

[0016] The two V-shaped blocks are arranged in the vertical axis direction parallel to the upper surface of the bottom plate, the V-shaped openings of the two V-shaped blocks are both upward and are both vertically fixed on the upper surface of the bottom plate; a rim plate positioning ball is fixedly arranged on the end face of one V-shaped block close to the other V-shaped block, and the distance between the rim plate positioning ball and the other V-shaped block is matched with the distance between the large end rim plate surface and the small end rim plate surface of the stator blade to be detected.

[0017] In this way, during detection and positioning, the rim plate positioning ball and the large end rim plate surface of the stator blade to be detected are in point contact, and the positioning is more accurate.

[0018] Further, the number of the hinge clamping devices is one.

[0019] The hinge clamping device is installed on the base plate, between the two V-shaped blocks and on the same side of the longitudinal axis defined by the two V-shaped blocks.

[0020] Alternatively, the number of hinge clamping devices is two.

[0021] Each of the V-shaped blocks is provided with one hinge clamping device.

[0022] Further, the torsion angle positioning device comprises a support block, a sliding block and a locking screw.

[0023] The support block is in the shape of "L", and a vertical sliding groove is provided on the vertical side of the "L" shape. A through screw hole is provided on the side wall of the sliding groove, which is adapted to the locking screw. A blocking pin is vertically fixed on the bottom plane of the sliding groove near the lower side.

[0024] The sliding block is in the shape of "T", and the vertical side of the "T" shape is located in the sliding groove and can slide up and down in the sliding groove. A through waist-shaped hole is vertically provided on the plane parallel to the bottom plane of the sliding groove of the vertical side of the "T" shape. The blocking pin is inserted into the waist-shaped hole. A compression spring and a semicircular key are sequentially placed above the blocking pin in the waist-shaped hole. A cover plate is provided on the slot of the sliding groove. The cover plate is detachably connected with the support block. Two positioning columns with spherical top on the upper end are provided on both sides of the vertical side of the "T" shape above the horizontal side of the "T" shape.

[0025] The locking screw passes through the screw hole and is used to abut against the sliding block when the sliding block reaches a position, thereby positioning the sliding block.

[0026] The torsion angle positioning device is arranged between the two V-shaped blocks, and the horizontal side of the "L" shape is arranged in parallel with the upper surface of the base plate and is fixed on the base plate through the horizontal side of the "L" shape. The positions of the two positioning columns on the torsion angle positioning device match the positions of the two positioning points on the reference section of the root of the stator blade to be detected.

[0027] In this way, on the one hand, the limiting is more reliable, and on the other hand, the sliding block and the stator blade to be detected are in point contact through the two positioning columns with spherical top on the upper end, so that the positioning is more accurate.

[0028] Further, in order to facilitate the locking operation, the locking screw is a knurled high head screw.

[0029] Further, in order to clamp once, the four to-be-detected curved surfaces on the stator blade end face can be detected, the profile tracing blocks have four, and the four profile tracing blocks correspond to the four to-be-detected curved surfaces on the stator blade end face one by one; the four to-be-detected curved surfaces are the exhaust edge of the large end, the intake edge of the large end, the exhaust edge of the small end, and the intake edge of the small end, respectively.

[0030] The angle pads have three; the upper surfaces of the bottom plate and the three angle pads correspond to the four profile tracing blocks to provide the mounting planes perpendicular to the four to-be-detected curved surfaces, respectively, and the four profile tracing blocks are installed on the upper surfaces of the bottom plate and the three angle pads one by one; the positions of the angle pads on the bottom plate are determined by the positions of the to-be-detected curved surfaces corresponding to the angle pads.

[0031] The beneficial effects of the present application are:

[0032] (1) The present application provides the mounting planes perpendicular to the to-be-detected curved surfaces for the profile tracing blocks by the angle pads, the profile tracing blocks are fixedly installed on the upper surfaces of the bottom plate perpendicular to the to-be-detected curved surfaces or the upper surfaces of the angle pads, the tracing surfaces of the profile tracing blocks are perpendicular to the mounting planes of the profile tracing blocks; the shapes of the tracing surfaces of the profile tracing blocks are the standard theoretical curved surface shapes corresponding to the to-be-detected curved surfaces; during detection, the measuring dial block body moves on the mounting planes of the profile tracing blocks, the probe B under the measuring dial block moves on the tracing surfaces of the profile tracing blocks, and the probe A above moves on the to-be-detected curved surfaces, so that the deviation value can be displayed on the dial gauge, and the measurement is accurate; and during detection, the contact part of the probe A and the to-be-detected curved surface is a cylindrical body perpendicular to the mounting plane of the profile tracing block, so that the narrow surface can be detected; the problem that the actual position of the narrow surface deviates from the theoretical position of the model due to the twisting of the precision forged blade profile relative to the theoretical model to a certain extent is solved, and the problem that it is difficult to accurately measure by using a three-coordinate measuring machine is solved; therefore, the technical problem that the special positioning measuring tool is needed when measuring by using the existing three-coordinate measuring machine, and a large measurement error is caused due to the deviation between the actual position and the theoretical position is solved. The measuring tool structure of the present application can realize rapid and accurate detection.

[0033] (2) The fixed assembly preferably includes a V-shaped block assembly, a hinge clamping device, and a torsion angle positioning device, so that the to-be-detected stator blade can be quickly fixed, and the detection efficiency can be improved and the detection cost can be reduced.

[0034] (3) The measuring tool structure for measuring the profile degree of the complex end face of the aero-engine stator blade profile of the present application preferably includes four profile tracing blocks and three angle pads, and the four to-be-detected curved surfaces on the stator blade end face can be detected by clamping once. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 is a schematic diagram of the embodiment of the present application (hinge clamping device and measuring table block are not shown in the figure);

[0036] Figure 2 is a schematic diagram of the embodiment of the present application (hinge clamping device and measuring table block are not shown in the figure);

[0037] Figure 3 is a schematic diagram of the hinge clamping device in the embodiment of the present application;

[0038] Figure 4 is a schematic diagram of the structure of the torsion angle positioning device in the embodiment of the present application (cover plate is not shown in the figure);

[0039] Figure 5 is a front view of the measuring table block in the embodiment of the present application;

[0040] Figure 6 is a top view of Figure 5 .

[0041] The explanation of each label in the figure is as follows:

[0042] 1 - base plate, 2 - angle pad, 3 - V-shaped block, 4 - profile copying block, 5 - pair of reference posts, 6 - torsion angle positioning device, 61 - support block, 62 - sliding block, 63 - locking screw, 64 - blocking pin, 65 - compression spring, 66 - semicircular key, 67 - positioning post, 7 - rim plate positioning ball, 8 - stator blade, 81 - large end outer rim plate surface, 82 - small end outer rim plate surface, 83 - air inlet edge of large end, 84 - air outlet edge of large end, 85 - air inlet edge of small end, 86 - air outlet edge of small end, 91 - mounting seat, 92 - first connecting rod, 93 - handle, 94 - second connecting rod, 95 - pressing head, 101 - probe A, 102 - probe B. DETAILED DESCRIPTION

[0043] The present application will be described in detail below in combination with the drawings and specific embodiments.

[0044] Referring to Figure 1 and Figure 2 , the structure of the measuring tool for measuring the complex end surface profile of the stator blade of an aero-engine of the present application comprises a base plate 1, a fixed assembly, an angle pad 2, a profile copying block 4, a pair of reference posts 5, and a measuring table block.

[0045] The aforementioned fixing assembly is mounted on the base plate 1 to fix the stator blade 8 to be tested above the base plate 1, restricting the six degrees of freedom of the stator blade 8 to be tested; the aforementioned angle pad 2 is fixedly mounted on the upper surface of the base plate 1, and when the stator blade 8 is fixed on the fixing assembly, and the surface to be tested on the end face of the stator blade 8 is not perpendicular to the upper surface of the base plate 1, the angle pad 2 provides a mounting plane perpendicular to the surface to be tested for the contour contouring block 4; the contour contouring block 4 has a contouring surface shape that corresponds to the standard theoretical surface shape of the surface to be tested; the contour contouring block 4 is fixedly mounted on the upper surface of the base plate 1 perpendicular to the surface to be tested or on the upper surface of the angle pad 2, and the contour contouring surface of the contour contouring block 4 is perpendicular to the mounting plane of the contour contouring block 4; the position of the contour contouring block 4 on the mounting plane of the contour contouring block 4 is determined by the projection position of the surface to be tested on the mounting plane of the contour contouring block 4; the aforementioned calibration post 5 is vertically mounted on the upper surface of the base plate 1 for calibrating the measuring dial to the "0" position; see also Figure 5 and Figure 6 The aforementioned measuring block includes a dial indicator and two coaxial cylindrical probes, A101 and B102, located at the top and bottom. During testing, the measuring block body moves on the mounting plane of the contour contour block 4, causing the probe B102 below the measuring block to move on the contour contour block 4, while the probe A101 above moves on the surface to be tested. The dial indicator displays the deviation value.

[0046] See Figure 1 In this embodiment, the aforementioned fixing components include a V-block assembly and a hinge clamping device. Figure 1 (Not shown above) and the torsion positioning device 6. See also Figure 1 and Figure 2 The aforementioned V-block assembly is used to restrict the two degrees of freedom of movement of the stator blade 8 to be tested along the horizontal axis and the vertical axis parallel to the upper surface of the base plate 1, as well as the two degrees of freedom of rotation about the horizontal axis parallel to the upper surface of the base plate 1 and about the vertical axis perpendicular to the upper surface of the base plate 1; the aforementioned hinge clamping device works together with the V-block assembly to restrict the degree of freedom of movement of the stator blade 8 to be tested along the vertical axis perpendicular to the upper surface of the base plate 1; the aforementioned torsion angle positioning device 6 is used to restrict the degree of freedom of rotation of the stator blade 8 to be tested about the vertical axis parallel to the upper surface of the base plate 1.

[0047] See Figure 1 and Figure 2The V-shaped block assembly in the embodiment comprises two V-shaped blocks 3; the two V-shaped blocks 3 are arranged in a longitudinal direction parallel to the upper surface of the bottom plate 1, the V-shaped openings of the two V-shaped blocks 3 are both upward, and the two V-shaped blocks 3 are both vertically fixed on the upper surface of the bottom plate 1; a rim plate positioning ball 7 is fixed on the end surface of one V-shaped block 3 close to the other V-shaped block 3; the distance between the rim plate positioning ball 7 and the other V-shaped block 3 is matched with the distance between the large end outer rim plate surface 81 and the small end outer rim plate surface 82 of the stator blade 8 to be detected. In this way, when the positioning is detected, the rim plate positioning ball and the large end outer rim plate surface of the stator blade to be detected are in point contact, and the positioning is more accurate.

[0048] Referring to Figure 3 , Figure 3 is a schematic view of the hinge clamping device in the embodiment of the application. The hinge clamping device can be obtained by market purchase. In the embodiment of the application, the number of the hinge clamping device can be one or two. When the number of the hinge clamping device is one, the hinge clamping device is installed on the bottom plate 1 and located at a position on the same side of the longitudinal axis determined by the two V-shaped blocks 3. When the number of the hinge clamping device is two, one hinge clamping device is installed on each of the V-shaped blocks 3. The mounting seat 91 is used to connect with the bottom plate 1 or the V-shaped block 3; one end of the first connecting rod 92 is hingedly connected with the mounting seat 91, the other end of the first connecting rod 92 is fixedly connected with the pressing head 95, the middle of the first connecting rod 92 is hingedly connected with one end of the second connecting rod 94, the other end of the second connecting rod 94 is hingedly connected with the middle of the handle 93, one end of the handle 93 is hingedly connected with the mounting seat 91, and the other end of the handle 93 can be pulled to realize the locking and unlocking of the stator blade to be detected.

[0049] Referring to Figure 4The torsion angle positioning device 6 comprises a supporting block 61, a sliding block 62 and a locking screw 63. The supporting block 61 is in the shape of "L", and a vertical sliding groove is arranged on the vertical side of the "L" shape. A through screw hole is arranged on the side wall of the sliding groove, and the screw hole is matched with the locking screw 63. A blocking pin 64 is vertically arranged on the bottom plane of the sliding groove near the lower side. The sliding block 62 is in the shape of "T", and the vertical side of the "T" shape is located in the sliding groove and can slide up and down along the sliding groove. A through waist-shaped hole is vertically arranged on the plane of the vertical side of the "T" shape which is parallel to the bottom plane of the sliding groove. The blocking pin 64 is inserted into the waist-shaped hole. A compression spring 65 and a semicircular key 66 are sequentially arranged above the blocking pin 64 in the waist-shaped hole. A cover plate (not shown in the drawing) is arranged on the slot of the sliding groove. The cover plate is detachably connected with the supporting block 61. Two positioning columns 67 with spherical top ends are arranged above the horizontal side of the "T" shape and on both sides of the vertical side of the "T" shape. The locking screw 63 passes through the screw hole and is used to abut against the sliding block 62 and position the sliding block 62 when the sliding block 62 reaches a position. In order to facilitate locking operation, the locking screw 63 is knurled high-head screw in the embodiment. Referring to Figure 1 and Figure 2 In the embodiment, the torsion angle positioning device 6 is arranged between the two V-shaped blocks 3, and the horizontal side of the "L" shape is arranged parallel to the upper surface of the bottom plate 1 and is fixed on the bottom plate 1 through the horizontal side of the "L" shape. The positions of the two positioning columns 67 on the torsion angle positioning device 6 match the positions of the two positioning points on the reference section at the root of the stator blade 8 to be detected.

[0050] Referring to Figure 1 and Figure 2 In order to complete the detection of the four to-be-detected curved surfaces on the end surface of the stator blade in one clamping, the profile copying blocks 4 are four, and the four profile copying blocks 4 correspond to the four to-be-detected curved surfaces on the end surface of the stator blade 8 one by one. The four to-be-detected curved surfaces are the exhaust edge 83 of the large end, the inlet edge 84 of the large end, the exhaust edge 85 of the small end and the inlet edge 86 of the small end. The angle pads 2 are three. The upper surfaces of the bottom plate 1 and the three angle pads 2 provide installation planes perpendicular to the four to-be-detected curved surfaces for the four profile copying blocks 4 one by one. The four profile copying blocks 4 are installed on the upper surfaces of the bottom plate 1 and the three angle pads 2 one by one. The positions of the angle pads 2 on the bottom plate 1 are determined by the positions of the to-be-detected curved surfaces corresponding to the angle pads 2.

[0051] When the measuring tool structure of the embodiment is used for detection, the stator blade to be detected is first fixed by the fixing assembly, then the measuring scale block is aligned to the "0" position on the upper surface of the bottom plate 1 and on the reference column 5, then the measuring scale block body moves on the installation plane of the profile tracing block 4, the probe B102 below the measuring scale block moves on the profile surface of the profile tracing block 4, the probe A101 above moves on the curved surface to be detected, and the deviation value is displayed on the dial gauge, so that the profile degree of the complex end surface of the stator blade can be measured conveniently and quickly.

[0052] The measuring tool structure for measuring the profile degree of the complex end surface of the stator blade of an aero-engine has simple structure, and when the measuring tool structure is used for measurement, the measurement speed is fast, the efficiency is high, the measurement result is accurate, and the detection cost can be saved.

Claims

1. The measuring tool structure for measuring the complex end face profile of the aero-engine stator blade, characterized in that: it comprises a base plate (1), a fixing assembly, an angle pad (2), a profile copying block (4), a reference column (5) and a measuring table block; the fixing assembly is arranged on the base plate (1) and used for fixing the stator blade (8) to be detected above the base plate (1) to limit the six degrees of freedom of the stator blade (8) to be detected; the angle pad (2) is fixedly arranged on the upper surface of the base plate (1) and used for providing an installation plane perpendicular to the surface to be detected for the profile copying block (4) when the stator blade (8) is fixed on the fixing assembly and the surface to be detected on the end face of the stator blade (8) is not perpendicular to the upper surface of the base plate (1); the profile copying block (4) has a copying surface shape corresponding to the shape of a standard theoretical surface corresponding to the surface to be detected; the profile copying block (4) is fixedly arranged on the upper surface of the base plate (1) or the upper surface of the angle pad (2) and perpendicular to the surface to be detected; the copying surface of the profile copying block (4) is perpendicular to the installation plane of the profile copying block (4); the position of the profile copying block (4) on the installation plane of the profile copying block (4) is determined by the projection position of the surface to be detected on the installation plane of the profile copying block (4); the reference column (5) is arranged vertically on the upper surface of the base plate (1) and used for calibrating the "0" position of the measuring table block; the measuring table block comprises a dial indicator and coaxial cylindrical probes A (101) and B (102); during detection, the measuring table block body moves on the installation plane of the profile copying block (4), the probe B (102) under the measuring table block moves on the copying surface of the profile copying block (4), the probe A (101) above the measuring table block moves on the surface to be detected, and the dial indicator displays the deviation value.

2. The measuring tool structure for measuring the complex end face profile of the aero-engine stator blade according to claim 1, characterized in that: the fixing assembly comprises a V-block assembly, a hinge clamping device and a torsion angle positioning device (6); the V-block assembly is used for limiting the two movement degrees of freedom of the stator blade (8) to be detected along the horizontal axis and the vertical axis parallel to the upper surface of the base plate (1), and the two rotation degrees of freedom of the stator blade (8) to be detected around the horizontal axis parallel to the upper surface of the base plate (1) and around the vertical axis perpendicular to the upper surface of the base plate (1); the hinge clamping device cooperates with the V-block assembly to limit the movement degree of freedom of the stator blade (8) to be detected along the vertical axis perpendicular to the upper surface of the base plate (1); and the torsion angle positioning device (6) is used for limiting the rotation degree of freedom of the stator blade (8) to be detected around the vertical axis parallel to the upper surface of the base plate (1).

3. The measuring tool structure for measuring the complex end face profile of the aero-engine stator blade according to claim 2, characterized in that: the V-block assembly comprises two V-blocks (3). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The two V-shaped blocks (3) are arranged in parallel to the longitudinal axis direction of the upper surface of the base plate (1), the V-shaped openings of the two V-shaped blocks (3) are both upward, and the two V-shaped blocks (3) are both vertically fixed on the upper surface of the base plate (1); a rim plate positioning ball (7) is fixedly arranged on the end surface of one V-shaped block (3) close to the other V-shaped block (3); the distance between the rim plate positioning ball (7) and the other V-shaped block (3) is matched with the distance between the large end outer rim plate surface (81) and the small end outer rim plate surface (82) of the to-be-detected stator blade (8).

4. The measuring tool structure for measuring the complex end surface profile of the stator blade of an aero-engine according to claim 3, characterized in that: The number of the hinge clamping devices is one; The hinge clamping device is installed on the base plate (1) and located on the same side of the longitudinal axis determined by the two V-shaped blocks (3).

5. The measuring tool structure for measuring the complex end surface profile of the stator blade of an aero-engine according to claim 3, characterized in that: The number of the hinge clamping devices is two; One hinge clamping device is installed on each V-shaped block (3).

6. The measuring tool structure for measuring the complex end surface profile of the stator blade of an aero-engine according to claim 3, characterized in that: The torsion angle positioning device (6) comprises a supporting block (61), a sliding block (62) and a locking screw (63); The supporting block (61) is "L"-shaped, a vertical sliding groove is arranged on the vertical side of the "L"-shaped structure, a through screw hole matched with the locking screw (63) is arranged on the side wall of the sliding groove, and a blocking pin (64) is vertically fixed on the lower position of the groove bottom plane of the sliding groove; The sliding block (62) is "T"-shaped, the vertical side of the "T"-shaped structure is located in the sliding groove and can slide up and down in the sliding groove, a through waist-shaped hole is vertically arranged on the plane of the vertical side of the "T"-shaped structure and the groove bottom plane of the sliding groove, the blocking pin (64) is inserted into the waist-shaped hole, a compression spring (65) and a semicircular key (66) are sequentially arranged above the blocking pin (64) in the waist-shaped hole, a cover plate is arranged on the opening of the sliding groove, the cover plate is detachably connected with the supporting block (61), and two positioning columns (67) with spherical top ends are arranged on the two sides of the vertical side of the "T"-shaped structure above the horizontal side of the "T"-shaped structure; The locking screw (63) passes through the screw hole and is used for positioning the sliding block (62) when the sliding block (62) reaches a position; The torsion angle positioning device (6) is arranged between the two V-shaped blocks (3), the horizontal side of the "L"-shaped structure is arranged in parallel to the upper surface of the base plate (1) and is fixed on the base plate (1) through the horizontal side of the "L"-shaped structure, and the positions of the two positioning columns (67) on the torsion angle positioning device (6) are matched with the positions of the two positioning points on the reference section at the root of the to-be-detected stator blade (8).

7. The gauge structure for measuring the complex end face profile of a stator blade of an aero-engine according to claim 6, characterized in that: The locking screw (63) is a knurled high-head screw.

8. The gauge structure for measuring the complex end face profile of a stator blade of an aero-engine according to claim 6, characterized in that: the profile tracing blocks (4) are four in number, and the four profile tracing blocks (4) correspond one-to-one to four curved surfaces to be detected on the end face of the stator blade (8); the four curved surfaces to be detected are respectively the exhaust edge (83) of the large end, the inlet edge (84) of the large end, the exhaust edge (85) of the small end, and the inlet edge (86) of the small end; the angle pads (2) are three in number; the upper surfaces of the bottom plate (1) and the three angle pads (2) provide one-to-one corresponding installation planes perpendicular to the four curved surfaces to be detected for the four profile tracing blocks (4), and the four profile tracing blocks (4) are installed one-to-one on the upper surfaces of the bottom plate (1) and the three angle pads (2); the positions of the angle pads (2) on the bottom plate (1) are determined by the positions of the curved surfaces to be detected corresponding thereto.

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