CN111272042A - Blade body thickness detection device and method - Google Patents
Blade body thickness detection device and method Download PDFInfo
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- CN111272042A CN111272042A CN202010245195.1A CN202010245195A CN111272042A CN 111272042 A CN111272042 A CN 111272042A CN 202010245195 A CN202010245195 A CN 202010245195A CN 111272042 A CN111272042 A CN 111272042A
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- 238000000034 method Methods 0.000 title abstract description 16
- 238000012360 testing method Methods 0.000 claims abstract description 29
- 238000003825 pressing Methods 0.000 claims description 5
- 238000005259 measurement Methods 0.000 abstract description 24
- 239000000306 component Substances 0.000 description 34
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
- G01B5/06—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness for measuring thickness
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Abstract
The invention belongs to the field of blade measurement, and discloses a device and a method for detecting the thickness of a blade body of a blade, wherein the device comprises a supporting component, a positioning component and a measuring component; the measuring assembly comprises a measuring contact, a lever assembly, a contact cover plate, a meter clamping block and a test meter, wherein the measuring contact comprises a fixed contact and a sliding contact; the fixed contact, contact apron and clamp table piece are all fixed to be set up on supporting component, form the contact cavity between contact apron and the supporting component, sliding contact can slide in the contact cavity, sliding contact's contact end sets up with fixed contact's contact end relatively, sliding contact's bottom and the table pole end connection of test meter, the table pole of test meter passes through the clamp table piece centre gripping, supporting component or clamp table piece are connected to lever assembly one end, sliding contact is connected to the other end, locating component and supporting component are connected. The invention not only improves the detection efficiency, but also truly reflects the blade body thickness at a certain distance between the air inlet edge and the air outlet edge of the blade, avoids misjudgment, and has convenient measurement and high measurement precision.
Description
Technical Field
The invention belongs to the field of blade measurement, and relates to a device and a method for detecting blade body thickness of a blade.
Background
The aircraft engine is the heart of the aircraft, and the aircraft engine blade is one of the core components of the engine, often is known as "heart in the heart". With the continuous development of design and manufacturing technology and the continuous improvement of blade manufacturing precision and manufacturing requirements, the measurement of the thickness of the air inlet and outlet edges of the blade often requires the measurement of the thickness of a blade body at a specified distance, as shown in fig. 1.
Currently, three methods are commonly used for measurement: 1. the profile template is measured, the thickness is judged by light transmission, but the error is large, and the method is not suitable for blade detection with high precision requirement; 2. the method has the advantages that the caliper is used for measurement, a detection person needs to hold the blade with one hand and use the caliper with the other hand for detection, but the method is inconvenient to use the caliper for measurement of a large blade and cannot ensure the measurement accuracy; 3. the three-coordinate measurement has high measurement accuracy, but has long measurement time, low efficiency and high technical requirement on detection personnel, and is not suitable for detection of large-batch blades.
Disclosure of Invention
The invention aims to overcome the defects of large measurement error or complex measurement process of the blade body thickness of the fixed distance blade at the air inlet and the air outlet sides in the prior art, and provides a device and a method for detecting the blade body thickness of the blade.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
in one aspect of the invention, the blade body thickness detection device comprises a supporting component, a positioning component and a measuring component; the measuring assembly comprises a measuring contact, a lever assembly, a contact cover plate, a meter clamping block and a test meter, wherein the measuring contact comprises a fixed contact and a sliding contact; the fixed contact, the contact cover plate and the meter clamping block are all fixedly arranged on the supporting assembly, a contact cavity is formed between the contact cover plate and the supporting assembly, the sliding contact is positioned in the contact cavity and can slide in the contact cavity, the contact end of the sliding contact is opposite to the contact end of the fixed contact, the bottom end of the sliding contact is connected with the end part of a meter rod of the test meter, the meter rod of the test meter is clamped through the meter clamping block, one end of the lever assembly is connected with the supporting assembly or the meter clamping block, the other end of the lever assembly is connected with the sliding contact, and the lever assembly is used for compressing the sliding contact and a blade; the positioning component is connected with the supporting component and used for limiting the distance between the air inlet edge or the air outlet edge of the blade to be measured and the contact end point of the measuring contact.
The blade body thickness detection device of the invention is further improved in that:
the positioning assembly comprises a positioning block, a positioning block cover plate and a screw; the positioning block cover plate is connected with the supporting assembly, a positioning block cavity is formed between the positioning block cover plate and the supporting assembly, the positioning block is located inside the positioning block cavity and can slide in the positioning block cavity, the screw is in threaded connection with the positioning block cover plate, and one end of the screw penetrates through the positioning block cover plate to be in contact with the positioning block and is used for compressing the positioning block.
The positioning assembly is a positioning block, the positioning block is fixedly connected with the supporting assembly, and a preset distance is reserved between the end face of one end, close to the measuring contact, of the positioning block and the side face, close to the positioning block, of one side of the measuring contact.
The supporting component comprises a base and an upright post; the stand and base upper surface are connected, and locating component and measuring component all are connected with the stand.
The included angle between the base and the upright post is 70-75 degrees.
The lever assembly comprises a tension spring, a lever, a connecting rod, a rotating shaft, two nuts and two cylindrical pins, and the lever comprises a first rod piece and a second rod piece;
the both ends of connecting rod are passed through the nut and are connected with the one end of first member and second member respectively, and the other end of first member and second member all is connected with sliding contact's both sides respectively through the cylindric lock, and extension spring one end connection presss from both sides table piece or supporting component, and the connecting rod is connected to the other end, and first member and second member all rotate with supporting component through the pivot and are connected, and the pivot is located between nut and the cylindric lock.
The sliding contact is connected with the supporting component through a sliding rail.
The end faces of the contact ends of the fixed contact and the sliding contact are spherical surfaces.
The test meter is a dial indicator or a dial indicator.
In another aspect of the present invention, a method for detecting blade body thickness includes the following steps:
step 1: adjusting the positioning component to enable the distance between the end face of the positioning component and the contact end point of the measuring contact to be the distance between the air inlet edge or the air exhaust edge required by the blade to be measured and the point to be measured;
step 2: pressing the lever assembly to enable the sliding contact to be far away from the fixed contact, placing the blade to be measured between the moving contact and the fixed contact, and enabling the air edge or the air exhaust edge of the blade to be measured to be in contact with the end face of the positioning assembly;
and step 3: and (4) loosening the lever assembly, and obtaining the thickness of the air inlet edge or the air exhaust edge of the blade to be measured at a fixed distance by the reading test meter.
Compared with the prior art, the invention has the following beneficial effects:
according to the blade body thickness detection device, the positioning assembly and the measuring assembly are supported by the supporting assembly, a detection person does not need to hold the detection device by hands, the detection device is placed on the workbench, the detection person can hold the blade by two hands to measure the thickness of the blade body at a fixed distance at the air inlet edge or the air outlet edge, and the detection result is more accurate. Under the action of the lever assembly, the blade to be measured is pressed tightly through the fixed contact and the sliding contact, reading is directly carried out through a test meter connected with the sliding contact, the thickness size of the air inlet edge or the air exhaust edge of the blade to be measured at a certain distance is directly detected, the accuracy of a detection result is improved, and the reading is more convenient; the standard blade or the surface member can be used for surface measurement, the difference value from the standard value can be measured, and different measurement methods can be used according to different requirements of the measured value. The blade body thickness detection device of the blade improves the detection efficiency, truly reflects the blade body thickness at a certain distance between the air inlet edge and the air outlet edge of the blade, avoids misjudgment, has the characteristics of convenient measurement, high measurement precision, wide application range and the like, has great popularization value, and provides reference experience for solving similar problems.
Furthermore, the positioning assembly comprises a positioning block, a positioning block cover plate and a screw; the positioning block cover plate is connected with the supporting assembly, a positioning block cavity is formed between the positioning block cover plate and the supporting assembly, the positioning block is located inside the positioning block cavity and can slide in the positioning block cavity, the screw is in threaded connection with the positioning block cover plate, one end of the screw penetrates through the positioning block cover plate to be in contact with the positioning block and is used for compressing the positioning block, the distance between the end face of the positioning block and the side face of the measuring contact is adjusted, the measurement of different distance size requirements is met, particularly in a scientific research experiment machine type, the production preparation cost can be saved.
Furthermore, the positioning assembly is a positioning block, the positioning block is fixedly connected with the supporting assembly, a preset distance is reserved between the end face of one end, close to the measuring contact, of the positioning block and the side face, close to the positioning block, of one side of the measuring contact, and testing time is greatly saved in detection of the thicknesses of the blade bodies at intervals of the air inlet edge and the air outlet edge of the large-batch blades.
Furthermore, the included angle between the base and the upright post is 70-75 degrees, so that the dial of the measuring meter faces to a detector, and the reading of the detector is facilitated.
Furthermore, the lever assembly comprises a tension spring, a lever, a connecting rod, a rotating shaft, two nuts and two cylindrical pins, and the spring force generated by the tension spring is converted into a force for driving the sliding contact to move towards the direction of the fixed contact through the lever, so that the fixed contact, the sliding contact and a distance measuring point of the blade to be measured are ensured to be in good contact.
Furthermore, the end faces of the contact ends of the fixed contact and the sliding contact are spherical surfaces, so that the measuring device is more suitable for blades in curved surface shapes, and the accuracy of measuring results is improved.
According to the blade body thickness detection method, the distance between the end face of the positioning component and the contact end point of the measuring contact is the distance between the air inlet edge or the air exhaust edge required by the blade to be measured and the point to be measured by adjusting the positioning component, so that the blade body thickness detection method can be suitable for blade body thickness measurement with different distance requirements, and has certain universality; pressing down lever assembly and making sliding contact keep away from fixed contact, will wait to measure the blade and put into between moving contact and the fixed contact to the gas limit or the exhaust limit that will wait to measure the blade and locating component's end face contact, loosening lever assembly, the reading test meter can, detection personnel need not handheld detection device, does not influence detection device's testing result, and testing process is simple and convenient, and detection efficiency is high.
Drawings
FIG. 1 is a schematic view of blade measurement requirements;
FIG. 2 is a schematic structural diagram of a detecting device according to the present invention;
FIG. 3 is a schematic view of the support member of the present invention;
FIG. 4 is a schematic view of a positioning assembly according to the present invention;
FIG. 5 is a schematic view of a fixed positioning block according to the present invention;
FIG. 6 is a schematic view of a measuring assembly according to the present invention;
FIG. 7 is a schematic diagram of the two contact requirements of the present invention;
FIG. 8 is a schematic view of the lever assembly of the present invention;
FIG. 9 is a schematic distance diagram of the detecting device of the present invention.
Wherein: 1-a support assembly; 2-a positioning assembly; 3-a measuring assembly; 4-a base; 5-upright column; 6-positioning blocks; 7-positioning block cover plate; 8-a screw; 9-a fixed contact; 10-a sliding contact; 11-a lever assembly; 12-a contact cover plate; 13-clamping a meter block; 14-test meter; 14-test meter; 15-a tension spring; 16-a lever; 17-a connecting rod; 18-a nut; 19-a rotating shaft; 20-cylindrical pin.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 2, the blade body thickness detection device of the blade of the invention comprises a support component 1, a positioning component 2 and a measuring component 3; the positioning component 2 and the measuring component 3 are both connected with the supporting component 1 and supported by the supporting component 1.
Referring to fig. 3, the supporting component 1 includes a base 4 and a column 5, the column 5 is connected with the upper surface of the base 4, the base 4 is used for supporting the column 5, the positioning component 2 and the measuring component 3 are both connected with the column 5, the column 5 is used for bearing the positioning component 2 and the measuring component 3, an included angle is formed between the column 5 and the base 4, generally, 70-75 degrees is selected, and the purpose is to enable the dial of the test meter 14 of the measuring component 3 to face the detector, so that the reading of the detector is facilitated.
Referring to fig. 4, the positioning assembly 2 includes three parts, namely a positioning block 6, a positioning block cover plate 7 and a screw 8, the positioning block cover plate 7 is connected with the column 5, a positioning block cavity is formed between the positioning block cover plate 7 and the column 5, the positioning block 6 is an adjustable sliding block and slides in the positioning block cavity formed by the column 5 and the positioning block cover plate 7, one end of the screw 8 penetrates through the positioning block cover plate 7 to be in contact with the positioning block 6 and is used for pressing the positioning block 6, when in use, the position of the positioning block 6 is determined according to the measurement requirement of the blade to be measured, and then the positioning. When the device is used for detecting the thicknesses of the inlet and exhaust edge distance blade bodies of the blades with the same specification in batches, referring to fig. 5, the positioning block 6 can be designed to be fixed on the upright post 5, and the ball center distance L between the upper end surface of the positioning block 6 and the fixed contact 9 and the sliding contact 10 is the inlet edge distance value or the exhaust edge distance value of the blades.
Referring to fig. 6, the measuring assembly 3 is composed of six parts, namely a fixed contact 9, a sliding contact 10, a lever assembly 11, a contact cover plate 12, a meter clamping block 13 and a test meter 14. The fixed contact 9 is fixedly arranged on the upright post 5, the contact cover plate 12 is connected with the upright post 5, a contact cavity is formed between the contact cover plate 12 and the upright post 5, the sliding contact 10 is in sliding connection with the contact cavity, the contact end of the sliding contact 10 is opposite to the contact end of the fixed contact 9, the bottom end of the sliding contact 10 is connected with the end part of a gauge rod of the test meter 14, the gauge rod of the test meter 14 is clamped by a gauge clamping block 13 fixedly connected with the upright post 5, the test meter 14 can select a dial indicator or a dial indicator lever assembly, one end of the test meter lever assembly 11 is connected with the upright post 5 or the gauge clamping block 13, the other end of the test meter lever assembly is connected with the sliding contact 10, when the blade to be measured is located between the fixed contact 9 and the sliding contact.
The fixed contact 9 and the sliding contact 10 are used for contacting with a measured point of the blade to be measured to measure, because the blade profile of the blade to be measured is a curved surface, the contact ends of the fixed contact 9 and the sliding contact 10 are preferably set to be spherical surfaces, the spherical centers of the fixed contact 9 and the sliding contact 10 are required to be in the same plane, the deviation is not more than 0.02, and the end surface of the positioning block 6 and the side surface of one side of the fixed contact 9 and the sliding contact 10, which is close to the positioning block 6, are arranged in parallel. Referring to fig. 7, in order to ensure the distance requirement, the actual distance value a between the centers of sphere of the fixed contact 9 and the sliding contact 10 and the surface of one side of the fixed contact 9 and the sliding contact 10 close to the positioning block 6 needs to be marked, and if the fixed positioning block 6 is used, the distance between the centers of sphere of the fixed contact 9 and the sliding contact 10 and the end surface of one end of the positioning block 6 close to the fixed contact 9 and the sliding contact 10 only needs to be ensured to be the distance value of the blade to be measured.
Referring to fig. 8, the lever assembly 11 includes a tension spring 15, a lever 16, a connecting rod 17, a rotating shaft 19, two nuts 18, and two cylindrical pins 20. The lever 16 includes a first rod and a second rod, both the first rod and the second rod are rotatably connected with the column 5 through a rotating shaft 19, one end of the connecting rod 17 is fixedly connected with one end of the first rod through a nut 18, the other end of the connecting rod 17 is fixedly connected with one end of the second rod through a nut 18, the other end of the first rod is connected with one side of the sliding contact 10 through a cylindrical pin 20, and the other end of the second rod is connected with the other side of the sliding contact 10 through a cylindrical pin 20. One end of the tension spring 15 is fixed on the meter clamping block 13 or the upright post 5, and the other end of the tension spring is connected on the connecting rod 17, so that the sliding contact 10 is always in close contact with a measuring point of the blade to be measured under the action of the tension spring 15. The lever 16 rotates around the rotating shaft 19 through the tension spring 15, drives the cylindrical pin 20 to enable the sliding contact 10 to move up and down along the contact cavity, so that the fixed contact 9 and the sliding contact 10 are in contact with a measuring point of a blade to be measured, the connecting rod 17 is used for fixing the first rod piece and the second rod piece into a whole through the two nuts 18, and the first rod piece and the second rod piece synchronously drive the sliding contact 10 to move.
According to the blade body thickness detection method of the blade, the detection device is placed on a detection workbench, referring to fig. 9, the distance L between the spherical centers of the fixed contact 9 and the sliding contact 10 and the surface of one side, close to the positioning block 6, of the fixed contact 9 and the sliding contact 10 is adjusted by the positioning block 6 in the positioning component 2 to meet the requirement of the blade to be measured, wherein the L is A + H, the A is the actual distance value between the spherical centers of the fixed contact 9 and the sliding contact 10 and the surface of one side, close to the positioning block 6, of the fixed contact 9 and the sliding contact 10, and the H is the actual distance value between the end surface, close to the fixed contact 9 and; and the lever component 11 in the movable measuring component 3 drives the sliding contact 10 to be separated from the fixed contact 9, the blade to be measured is placed in the movable measuring component, and finally the measured size of the blade to be measured is obtained through reading of the test meter 14 in the movable measuring component 3.
The blade body thickness detection device of the blade meets the measurement requirements of different distance sizes of the blade to be measured by using a sliding rail technology and adjusting the distance between the end surface of the positioning block 6 and the surfaces of the fixed contact 9 and the sliding contact 10, and particularly can save the production preparation cost in a scientific research experiment machine type; by using the lever assembly, the tension generated by the tension spring 15 is converted into a force for promoting the sliding contact 10 to move towards the fixed contact 9 through the lever 16, so that the fixed contact 9 and the sliding contact 10 are ensured to be in good contact with a distance measuring point of a blade to be measured; the device is placed on a workbench through the supporting part 1, and a tester can hold the blade with both hands to advance and measure the thickness of the blade body at a fixed distance at the exhaust edge, so that the detection result is more accurate; the device can be used for carrying out the meter setting by itself, the thickness size of the inlet and exhaust edge distance blade body of the measured blade can be directly detected through the test meter 14, a standard blade or a meter setting piece can be used for carrying out the meter setting, the phase difference value between the standard value and the standard value can be measured, and different measurement methods can be used according to different requirements of the measured value; the device for detecting the thickness of the blade body of the blade can quickly and accurately measure the thickness of the blade body at intervals of the air inlet edge and the air outlet edge of the blade, improves the detection efficiency, truly reflects the thickness of the blade body at intervals of the air inlet edge and the air outlet edge of the blade, avoids misjudgment, has the characteristics of convenience in measurement, high measurement precision, wide application range and the like, has great popularization value, and provides reference experience for solving similar problems.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (10)
1. The blade body thickness detection device is characterized by comprising a supporting assembly (1), a positioning assembly (2) and a measuring assembly (3); the measuring component (3) comprises a measuring contact, a lever component (11), a contact cover plate (12), a meter clamping block (13) and a test meter (14), and the measuring contact comprises a fixed contact (9) and a sliding contact (10);
the fixed contact (9), the contact cover plate (12) and the meter clamping block (13) are all fixedly arranged on the supporting component (1), a contact cavity is formed between the contact cover plate (12) and the supporting component (1), the sliding contact (10) is located inside the contact cavity and can slide in the contact cavity, the contact end of the sliding contact (10) is opposite to the contact end of the fixed contact (9), the bottom end of the sliding contact (10) is connected with the end part of a meter rod of the test meter (14), the meter rod of the test meter (14) is clamped by the meter clamping block (13), one end of the lever component (11) is connected with the supporting component (1) or the meter clamping block (13), the other end of the lever component is connected with the sliding contact (10), and the lever component (11) is used for pressing the sliding contact (10) and a blade to be measured; the positioning component (2) is connected with the supporting component (1) and is used for limiting the distance between the air inlet edge or the air exhaust edge of the blade to be measured and the contact end point of the measuring contact.
2. The blade body thickness detection device of claim 1, wherein the positioning assembly (2) comprises a positioning block (6), a positioning block cover plate (7) and a screw (8);
locating piece apron (7) is connected with supporting component (1), forms the locating piece cavity between locating piece apron (7) and supporting component (1), and locating piece (6) are located locating piece cavity inside and can slide in the locating piece cavity, screw (8) and locating piece apron (7) threaded connection, and locating piece apron (7) and locating piece (6) contact are passed to screw (8) one end for compress tightly locating piece (6).
3. The blade body thickness detection device of claim 1, wherein the positioning assembly (2) is a positioning block (6), the positioning block (6) is fixedly connected with the support assembly (1), and a preset distance is reserved between an end face of one end of the positioning block (6) close to the measuring contact and a side face of one side of the measuring contact close to the positioning block (6).
4. The blade body thickness detection device according to claim 1, wherein the support assembly (1) comprises a base (4) and a post (5); stand (5) and base (4) upper surface connection, locating component (2) and measuring component (3) all are connected with stand (5).
5. The blade body thickness detection device of claim 4, wherein the included angle between the base (4) and the upright post (5) is 70-75 °.
6. The blade body thickness detection device of claim 1, wherein the lever assembly (11) comprises a tension spring (15), a lever (16), a connecting rod (17), a rotating shaft (19), two nuts (18) and two cylindrical pins (20), and the lever (16) comprises a first rod and a second rod;
the both ends of connecting rod (17) are passed through nut (18) and are connected with the one end of first member and second member respectively, the other end of first member and second member all is connected with the both sides of sliding contact (10) respectively through cylindric lock (20), extension spring (15) one end link grip table piece (13) or supporting component (1), connecting rod (17) are connected to the other end, first member and second member all rotate with supporting component (1) through pivot (19) and are connected, and pivot (19) are located between nut (18) and cylindric lock (20).
7. The blade body thickness detection device of claim 1, wherein the sliding contact (10) is connected with the support assembly (1) through a sliding rail.
8. The blade body thickness detection device according to claim 1, wherein the contact end faces of the fixed contact (9) and the sliding contact (10) are spherical.
9. The blade body thickness detection device of claim 1, wherein the test meter (14) is a dial indicator or a dial indicator.
10. A blade body thickness detection method based on the detection device of any one of claims 1 to 9, characterized by comprising the following steps:
step 1: adjusting the positioning component (2) to enable the distance between the end face of the positioning component (2) and the contact end point of the measuring contact to be the distance between the air inlet edge or the air exhaust edge required by the blade to be measured and the point to be measured;
step 2: pressing the lever component (11) to enable the sliding contact (10) to be far away from the fixed contact (9), placing the blade to be measured between the moving contact (10) and the fixed contact (9), and contacting the air edge or the exhaust edge of the blade to be measured with the end surface of the positioning component (2);
and step 3: and (3) loosening the lever assembly (11), and obtaining the thickness of the air inlet edge or the air exhaust edge of the blade to be measured from the reading test meter (14).
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| CN202010245195.1A CN111272042A (en) | 2020-03-31 | 2020-03-31 | Blade body thickness detection device and method |
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| CN112179238A (en) * | 2020-09-29 | 2021-01-05 | 中国航发动力股份有限公司 | Device and method for measuring end face position of blade body of rectifying blade |
| CN113899284A (en) * | 2021-09-29 | 2022-01-07 | 中国航发动力股份有限公司 | Measuring tool and measuring method for detecting thickness of coating of engine blade |
| CN119704486A (en) * | 2025-02-28 | 2025-03-28 | 贵阳航发精密铸造有限公司 | Low-pressure turbine blade tenon tooth processing device and method |
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| CN119704486A (en) * | 2025-02-28 | 2025-03-28 | 贵阳航发精密铸造有限公司 | Low-pressure turbine blade tenon tooth processing device and method |
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