Device and method for detecting location degree of blade-shaped hole of inner ring of thin-wall sheet metal stator

Abstract

The invention belongs to the technical field of mechanical detection, and relates to a thin-wall sheet metal stator inner ring blade-shaped hole position accuracy detection device and method. Comprising a base, a rotating disc assembly is rotatably arranged on the base and used for installing a to-be-measured part, measuring assemblies are evenly arranged on the base in the circumferential direction, the to-be-measured part is fixed through the rotating disc assembly, the detection angle is adjusted, and the problem that a large-size thin-wall sheet metal part is prone to deformation due to poor rigidity can be effectively solved; according to the invention, extra deformation of the part caused by unstable positioning in the detection process is avoided, so that the measurement error caused by deformation is greatly reduced, the accuracy of the detection result is ensured, and the problem that the measurement precision is difficult to guarantee due to the deformation of the part in the background technology is solved. The measuring assembly can be used for rapidly and accurately measuring the location degree of the large-size and high-precision thin-wall stator inner blade profile hole, so that the detection problem after machining of the stator inner ring blade profile hole is solved, the measurement requirement is met, and meanwhile the detection time is shortened by 50%.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of mechanical detection, and relates to a thin-wall sheet metal stator inner ring vane type hole position degree detection device and method. BACKGROUND

[0002] The performance of an aero-engine, as the core power device of an aircraft, directly determines the flight efficiency, safety and reliability of the aircraft. The stator inner ring is a key structural component in the compressor or turbine part of the aero-engine, mainly used for positioning and supporting the blades inside the engine, ensuring that the blades maintain a stable working position under high-speed rotating working conditions, and thus ensuring the overall aerodynamic performance and operation safety of the engine. The structure of the aero-engine stator inner ring is shown in Figure 1 This kind of stator inner ring part is usually made of sheet metal with a thickness of 1mm, with a maximum diameter close to 800mm, belonging to a typical large-size thin-wall structural component. There are vane type holes for installing blades uniformly distributed in the circumferential direction of the stator inner ring. The machining precision of these vane type holes directly affects the installation precision of the blades and the subsequent working performance of the engine. Therefore, a high-precision machining method needs to be used. At present, the industry mostly uses laser punching machining method to ensure the machining precision of the vane type holes. At the same time, in order to ensure that the vane type holes can meet the position requirements of blade installation, the position degree of the vane type holes also needs to be strictly detected. During the detection of the position degree of the vane type holes of the aero-engine stator inner ring, since the part is a large-size thin-wall sheet metal component, its own rigidity is poor. After machining, it is easy to deform due to external environmental factors (such as temperature change, slight vibration) or its own stress release. If this deformation is not controlled and considered, it will directly lead to a large error in the measurement result of the position degree of the vane type holes, which cannot accurately reflect the actual position precision of the vane type holes, and may cause blade installation deviation, affecting the normal operation of the engine and even causing safety hazards. In order to prevent measurement errors caused by part deformation, the industry usually requires that the position degree measurement be completed within 1 hour after the machining of the vane type holes of the part is completed, which puts forward higher requirements on the detection efficiency of the vane type hole position degree detection method. The detection method needs to be able to quickly complete the detection work in a short time while ensuring the accuracy of the detection result. Currently, in the field of mechanical manufacturing, the conventional detection methods for part size and position degree mainly include coordinate measuring machine (CMM, a high-precision detection device that obtains the coordinates of each point on the surface of the part by moving the probe, and then calculates the size, shape and position accuracy of the part), image measurement and other methods. Among them, coordinate measuring machine has been widely used in high-precision part detection due to its high detection accuracy and ability to detect complex-shaped parts. For the position degree detection of the inner ring blade type hole of the stator in the aero-engine, theoretically, coordinate measuring machine can also be used to measure each hole of the inner ring blade type hole on the coordinate measuring machine, obtain the actual position coordinates of each hole, and compare them with the design theoretical coordinates to calculate the position degree error of the blade type hole and determine whether it meets the design requirements. However, when using coordinate measuring machine to detect the position degree of the inner ring blade type hole of the aero-engine stator, there are still obvious problems. On the one hand, the coordinate measuring process is tedious, which requires first clamping and positioning the part, adjusting the attitude of the part to align it with the coordinate system of the detection equipment, and then controlling the probe to measure each blade type hole one by one. For the stator inner ring part with multiple blade type holes evenly distributed on the circumference, the entire detection process takes a long time, usually more than 1 hour to complete the position degree detection of the blade type hole of one part, which cannot meet the requirement of "completing the position degree measurement within 1 hour after the blade type hole is machined", and the detection efficiency is low. On the other hand, since the stator inner ring is a large-size thin-walled part, if the clamping force is not properly controlled during the clamping process of the coordinate measuring, it may further exacerbate the deformation of the part, increase the measurement error, and affect the accuracy of the detection result. In addition, the coordinate measuring equipment is usually large in size and high in cost, and has strict requirements on the detection environment (such as constant temperature, constant humidity, and shockproof environment), which makes it difficult to realize the on-site rapid detection of the stator inner ring part, further limiting its application in the position degree detection of the blade type hole of the part. In summary, the existing conventional detection methods cannot meet the demand of rapid and accurate detection of the position degree of the blade type hole of the aero-engine stator inner ring, and it is urgent to design a special measuring device specially designed for the structure characteristics of the part to reduce the influence of part deformation on the measurement result and improve the detection efficiency, so as to solve the problems in the current detection process. SUMMARY

[0003] The purpose of the present application is to provide a thin-walled sheet metal stator inner ring blade type hole position degree detection device and method to solve the technical problems of complex operation and low efficiency in the prior art.

[0004] To achieve the above-mentioned purpose, the following technical solutions are adopted: The first aspect discloses a thin-wall sheet metal stator inner ring vane hole position degree detection device.

[0005] Preferably, the base is a hollow annular disc, and a ring groove is formed in the annular disc, and the rotating disc assembly is arranged in the ring groove.

[0006] Preferably, the rotating disc assembly comprises a first gasket, a second gasket, a rotating disc, balls and a pressing block; the first gasket is embedded in the base, the rotating disc is coaxially arranged on the base, the second gasket is arranged at the lower end surface of the rotating disc and in contact with the first gasket, the balls are arranged between the first gasket and the second gasket, and the pressing block is fixed to the base outside the rotating disc and used for axially limiting the rotating disc.

[0007] Preferably, the rotating disc is a hollow annular disc, a positioning stopper is formed in the upper end surface of the rotating disc and used for mounting the measured part, and a ring groove is formed in the lower end surface of the rotating disc, and the second gasket is embedded in the ring groove.

[0008] Preferably, the first gasket and the second gasket are both circular rings with an L-shaped cross section.

[0009] Preferably, the measuring assembly comprises a measuring block and a vane block, the measuring block is fixed to the base, and the vane block is arranged on the measuring block.

[0010] Preferably, the measuring block is a rectangular block, a vane through hole is formed in the measuring block and used for mounting the vane block, and the sliding fit clearance between the vane block and the vane through hole in the measuring block is not greater than 0.03 mm.

[0011] Preferably, the rotating disc further comprises a supporting block, a threaded hole is formed in the supporting block, a knurl screw is assembled in the threaded hole, and the knurl screw is used for stopping the rotating disc.

[0012] The second aspect discloses a thin-wall sheet metal stator inner ring vane hole position degree detection method, which comprises the following steps. The measured part is mounted on the rotating disc assembly. The measuring assembly is moved to the vicinity of the measured part, the angle of the measured part is adjusted to a position where the vane hole matches the measuring assembly through the rotating disc assembly, the rotating disc assembly is fixed, and the measuring assembly completes the vane hole position degree detection.

[0013] Preferably, the rotating disc assembly comprises a rotating disc, and the measuring assembly comprises a measuring block and a vane block, and the method comprises the following steps. The to-be-tested part is installed on the turntable, so that the A reference surface of the to-be-tested part is attached to the upper end positioning surface of the turntable, and the AJ reference surface of the to-be-tested part is attached to the radial positioning surface of the turntable; the gap between the A reference surface of the to-be-tested part and the upper end positioning surface of the turntable and the gap between the AJ reference surface of the to-be-tested part and the radial positioning surface of the turntable are not greater than 0.02 mm; The airfoil block is pushed to the side surface of the to-be-tested part, the turntable is rotated to the position where the airfoil hole of the to-be-tested part is matched with the airfoil block, the airfoil block is pushed to the airfoil hole of the part, the turntable is fixed, and then the airfoil blocks at the corresponding positions are pushed into the airfoil holes of the part in sequence, and the detection is completed after the airfoil blocks are adjusted.

[0014] Compared with the prior art, the present application has the following beneficial effects: The thin-wall sheet metal stator inner ring airfoil hole position degree detection device comprises a base, a turntable assembly is rotationally arranged on the base and is used for installing a to-be-tested part, and a plurality of measurement assemblies are uniformly arranged on the base in the circumferential direction. The to-be-tested part is fixed by the turntable assembly and the detection angle is adjusted, which can effectively limit the deformation of large-size thin-wall sheet metal parts due to poor rigidity, avoid additional deformation of the part due to unstable positioning during detection, greatly reduce the measurement error caused by deformation, ensure the accuracy of the detection result, and solve the problem that the measurement accuracy is difficult to guarantee due to part deformation in the background art. The measurement assemblies can quickly and accurately measure the position degree of the large-size, high-precision thin-wall stator inner airfoil hole, so as to solve the detection problem of the stator inner ring airfoil hole after processing and meet the measurement needs, while the detection time is shortened by 50%. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0016] Figure 1 The figure is a structure schematic diagram of the to-be-tested part of the present application; wherein, (a) is a front view, and (b) is a top view; Figure 2 The figure is a structure schematic diagram of the detection device of the embodiment of the present application; wherein, (a) is a partial schematic diagram, and (b) is an A-A cross-sectional view.

[0017] Wherein: 1-base; 2-first gasket; 3-second gasket; 4-turntable; 5-rolling ball; 6-support block; 7-embossed screw; 8-measurement block; 9-airfoil block; 10-pressing block. DETAILED DESCRIPTION

[0018] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0020] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0021] In the description of the embodiments of the present application, it should be noted that, if the terms "upper", "lower", "horizontal", "inner" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0022] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0023] In the description of the embodiments of the present application, it should also be noted that, unless otherwise explicitly specified and limited, if the terms "arrangement", "installation", "connection", "connection" appear, they should be understood in a broad sense, for example, they can be fixedly connected, or detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0024] The present application will be described in further detail below with reference to the drawings: Reference Figure 2The application discloses a thin-wall sheet metal stator inner ring blade type hole position degree detection device, which comprises a base 1, a rotating disc assembly is arranged on the base 1 in a rotating mode and is used for mounting a part to be detected, and a plurality of measuring assemblies are uniformly arranged on the base 1 in a circumferential direction.

[0025] A thin-wall sheet metal stator inner ring blade type hole position degree detection method comprises the following steps. The part to be detected is mounted on the rotating disc assembly. The measuring assembly is moved to the vicinity of the part to be detected, the angle of the part to be detected is adjusted to a position where the blade type hole is matched with the measuring assembly through the rotating disc assembly, the rotating disc assembly is fixed, and the measuring assembly completes the blade type hole position degree detection.

[0026] In some embodiments, the base 1 is a hollow annular disc, a ring-shaped groove is formed in the annular disc, and the rotating disc assembly is arranged in the ring-shaped groove.

[0027] In some embodiments, the rotating disc assembly comprises a first gasket 2, a second gasket 3, a rotating disc 4, a ball 5 and a pressing block 10; the first gasket 2 is embedded in the base 1, the rotating disc 4 is coaxially arranged on the base 1, the second gasket 3 is arranged at the lower end surface of the rotating disc 4 and is in contact with the first gasket 2, the ball 5 is arranged between the first gasket 2 and the second gasket 3, and the pressing block 10 is fixed to the base 1 at the outer side of the rotating disc 4 and is used for axially limiting the rotating disc 4.

[0028] A thin-wall sheet metal stator inner ring blade type hole position degree detection method comprises the following steps. The part to be detected is mounted on the rotating disc 4, the A reference surface of the part to be detected is attached to the upper end positioning surface of the rotating disc 4, the AJ reference surface of the part to be detected is attached to the radial positioning surface of the rotating disc 4, and the gap between the A reference surface of the part to be detected and the upper end positioning surface of the rotating disc 4 and the gap between the AJ reference surface of the part to be detected and the radial positioning surface of the rotating disc 4 are not greater than 0.02 mm. The measuring assembly is moved to the vicinity of the part to be detected, the angle of the part to be detected is adjusted to a position where the blade type hole is matched with the measuring assembly through the rotating disc assembly, the rotating disc assembly is fixed, and the measuring assembly completes the blade type hole position degree detection.

[0029] In some embodiments, the rotating disc 4 is a hollow annular disc, a positioning stopper is formed in the upper end surface of the rotating disc 4 and is used for mounting the part to be detected, a ring-shaped groove is formed in the lower end surface of the rotating disc 4, and the second gasket 3 is embedded in the ring-shaped groove.

[0030] In some embodiments, the first gasket 2 and the second gasket 3 are both circular rings with L-shaped cross sections.

[0031] In some embodiments, the measuring assembly comprises a measuring block 8 fixed on the base 1 and a blade block 9 arranged on the measuring block 8.

[0032] A method for detecting the position of a thin-wall sheet metal stator inner ring blade hole, comprising the following steps: The part to be measured is installed on the turntable assembly; The blade block 9 is pushed inward to the side of the part to be measured, the turntable 4 is rotated to match the blade hole of the part to be measured with the blade block 9, the blade block 9 is pushed to the blade hole of the part, the turntable 4 is fixed, and then the blade block 9 is pushed to the blade hole of the part at the corresponding position, and the detection is completed after adjusting the blade block 9.

[0033] In some embodiments, the measuring block 8 is a rectangular block, and a blade hole is formed in the measuring block 8 for installing the blade block 9; the sliding fit clearance between the blade block 9 and the blade hole in the measuring block 8 is not greater than 0.03 mm.

[0034] In some embodiments, the turntable 4 is further provided with a support block 6, a threaded hole is formed in the support block 6, and a knurling screw 7 is assembled in the threaded hole for stopping the turntable 4.

[0035] A method for detecting the position of a thin-wall sheet metal stator inner ring blade hole, comprising the following steps: First, the blade block 9 is pushed outward by a certain distance to leave a part installation space, then the part A reference is installed downward on the position gauge, the A reference surface of the part is attached to the upper end positioning surface of the turntable 4 of the position gauge, the AJ reference surface of the part is tightly attached to the radial positioning surface of the turntable 4 of the position gauge, the attachment clearance between the A reference surface of the part and the upper end positioning surface of the turntable 4 of the position gauge and the attachment clearance between the AJ reference surface of the part and the radial positioning surface of the turntable 4 of the position gauge are detected using a feeler gauge, and the attachment clearance is not greater than 0.02 mm. After the part is installed, the blade block 9 is pushed inward to the side of the part, then the part is rotated to the position where the blade hole matches the blade block 9, the blade block 9 is pushed to about 2 mm inside the blade hole of the part, the knurling screw 7 at the adjacent position is tightened at the same time, then the blade block 9 is pushed to the blade hole of the part at the corresponding position, and finally the knurling screw 7 at the corresponding position is loosened, and the detection is completed after adjusting the blade block 9.

[0036] In some embodiments, a thin-wall sheet metal stator inner ring vane hole position degree detection device is composed of a base 1, a rotating disc assembly, and a measuring assembly. The base 1 is a hollow annular disc with a ring-shaped groove for placing a first washer 2. The base 1 is evenly distributed with threaded holes for connecting measuring blocks 8 and pressing blocks 10. The rotating disc assembly is composed of the first washer 2, a second washer 3, a rotating disc 4, balls 5, and the pressing blocks 10. The first washer 2 and the second washer 3 are L-shaped rings. The first washer 2 is clamped into the ring-shaped groove of the base. The rotating disc 4 is a hollow annular disc with a positioning stop at the upper end for installing parts and a ring-shaped groove at the lower end for installing the second washer 3. The measuring assembly is composed of the measuring blocks 8 and vane blocks 9. The measuring block 8 is a rectangular block with a vane-shaped through hole at the upper end for installing the vane block 9. The vane block 9 is a profile gauge matching the vane hole. The design basis of the vane block 9 is the profile number module of the vane hole. The profile line is extracted from the profile number module of the vane hole of the part by computer reverse technology. The profile line of the vane number module is divided into dense points by grid. The numerical control program is formed according to the point data to manufacture the vane block 9. The vane-shaped through hole on the measuring block 8 is also manufactured. The sliding fit clearance between the vane block 9 and the vane-shaped through hole on the measuring block 8 is not greater than 0.03 mm. The supporting blocks 6 are fixed on the rotating disc 4 by screws. The embossing screws 7 cooperate with the threaded holes of the supporting blocks 6. The up-and-down position of the embossing screws 7 is adjusted by turning, achieving the stop effect of the rotating disc 4.

[0037] Detection method: when detecting the position degree of the part, first push the vane block 9 outward to a certain distance to leave space for installing the part. Then install the part A reference downward on the position degree gauge so that the A reference surface of the part and the upper end positioning surface of the rotating disc 4 of the position degree gauge are in close contact, and the AJ reference surface of the part and the radial positioning surface of the rotating disc 4 of the position degree gauge are in close contact. Use a feeler gauge to detect the close contact clearance between the A reference surface of the part and the upper end positioning surface of the rotating disc 4 of the position degree gauge and the AJ reference surface of the part and the radial positioning surface of the rotating disc 4 of the position degree gauge. The close contact clearance is not greater than 0.02 mm. After the part is installed, push the vane block 9 inward to the side surface of the part. Then rotate the part to the position where the vane hole matches the vane block 9. Push the vane block 9 to about 2 mm inside the vane hole of the part. At the same time, tighten the embossing screws 7 at the nearby position. Then push the vane blocks 9 at the positions of the vane holes of the part in turn. Finally, loosen the embossing screws 7 in turn, adjust the vane block 9 appropriately, and complete the detection.

[0038] The application can effectively limit the deformation of the large-size thin-wall sheet metal part due to poor rigidity, avoid additional deformation of the part during the detection process due to unstable positioning, thereby greatly reducing the measurement error caused by deformation, ensuring the accuracy of the detection result, and solving the problem in the background art that the measurement accuracy is difficult to guarantee due to part deformation. At the same time, the whole detection process is convenient to operate, from pushing out the blade type block to leave installation space, completing part positioning and installation, to pushing the blade type block into the blade type hole and adjusting through the embossed screw auxiliary fixing, the steps are simple and efficient, compared with the conventional three-coordinate detection method, without complicated clamping positioning and slow measurement process, the detection time can be shortened by 50%, the detection efficiency is greatly improved, and the time requirement of "completing the position measurement within 1 hour after the part blade type hole is machined" in the background technology is fully met, effectively solving the problem that the conventional detection method is low in efficiency and cannot adapt to the detection requirement of the part. In addition, the detection method is specially designed for the structural characteristics of the large-size, high-precision thin-wall stator inner ring, without relying on the three-coordinate detection equipment which is large in size, high in cost and strict in environmental requirements, and can quickly carry out detection work on site, which not only adapts to the special structure of the part, but also reduces the dependence on the detection environment and equipment, and effectively solves the detection problem of the stator inner ring blade type hole after machining, fully meeting the actual measurement needs.

[0039] The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A device for detecting the position of an inner ring-shaped hole in a thin-walled sheet metal stator, characterized in that, Includes a base (1), on which a turntable assembly is rotatably mounted for mounting the part to be measured, and measuring components are evenly arranged along the circumference of the base (1).

2. The device for detecting the position of the inner ring-shaped hole in a thin-walled sheet metal stator according to claim 1, characterized in that, The base (1) is a ring-shaped disk with a hollow center, and a ring groove is provided on the ring-shaped disk. The turntable assembly is set in the ring groove.

3. The device for detecting the position of the inner ring-shaped hole in a thin-walled sheet metal stator according to claim 1, characterized in that, The turntable assembly includes a first washer (2), a second washer (3), a turntable (4), a ball bearing (5), and a pressure block (10). The first washer (2) is embedded in the base (1), the turntable (4) is coaxially mounted on the base (1), the second washer (3) is mounted on the lower end face of the turntable (4) and contacts the first washer (2), and the ball bearing (5) is mounted between the first washer (2) and the second washer (3). The pressure block (10) is fixed on the base (1) and located outside the turntable (4) for axially limiting the turntable (4).

4. The device for detecting the position of the inner ring-shaped hole in a thin-walled sheet metal stator according to claim 3, characterized in that, The turntable (4) is a ring-shaped disc with a hollow center. The upper end face of the turntable (4) is provided with a positioning stop for installing the part to be tested, and the lower end face is provided with an annular groove. The second washer (3) is embedded in the annular groove.

5. The device for detecting the position of the inner ring-shaped hole in a thin-walled sheet metal stator according to claim 3, characterized in that, The first washer (2) and the second washer (3) are both circular rings with an L-shaped cross section.

6. The device for detecting the position of the inner ring-shaped hole in a thin-walled sheet metal stator according to claim 1, characterized in that, The measuring component includes a measuring block (8) and a blade block (9). The measuring block (8) is fixed on the base (1), and the blade block (9) is set on the measuring block (8).

7. The device for detecting the position of the inner ring-shaped hole in a thin-walled sheet metal stator according to claim 6, characterized in that, The measuring block (8) is a rectangular block, and a blade-shaped through hole is provided on the measuring block (8) for installing the blade-shaped block (9); the sliding gap between the blade-shaped block (9) and the blade-shaped through hole on the measuring block (8) is no greater than 0.03mm.

8. The device for detecting the position of the inner ring-shaped hole in a thin-walled sheet metal stator according to claim 1, characterized in that, The turntable (4) is also provided with a support block (6), and the support block (6) has a threaded hole, and a knurled screw (7) is installed in the threaded hole to stop the turntable (4).

9. A method for detecting the position accuracy of the inner ring-shaped hole in a thin-walled sheet metal stator, characterized in that, The detection device according to any one of claims 1 to 8 comprises the following steps: Mount the part to be tested onto the turntable assembly; Move the measuring component to the vicinity of the part to be measured, adjust the angle of the part to be measured using the turntable component until the blade orifice matches the measuring component, fix the turntable component, and the measuring component completes the blade orifice position measurement.

10. The method for detecting the position of the inner ring-shaped hole in a thin-walled sheet metal stator according to claim 9, characterized in that, The turntable assembly includes a turntable (4); the measuring assembly includes a measuring block (8) and a blade block (9), and includes the following steps: The part to be tested is mounted on the turntable (4) so ​​that the A reference surface of the part to be tested is in contact with the upper positioning surface of the turntable (4); the AJ reference surface of the part to be tested is in close contact with the radial positioning surface of the turntable (4); the gap between the A reference surface of the part to be tested and the upper positioning surface of the turntable (4) and the AJ reference surface of the part to be tested and the radial positioning surface of the turntable (4) is not greater than 0.02 mm. Push the blade block (9) inward to the side of the part to be tested, rotate the turntable (4) to move the part to be tested to the position where the blade hole of the part to be tested matches the blade block (9), push the blade block (9) to the opening of the blade hole of the part, fix the turntable (4), and then push it and several blade blocks (9) to the corresponding positions of the blade hole of the part in sequence. After adjusting the blade block (9), the test is completed.

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