A measuring tool for the blade passage and profile of an aero-engine

Abstract

This utility model discloses an aero-engine blade channel and profile measuring device, comprising a base, a channel measuring device, and a profile measuring device. The device uses the base to position and fix the aero-engine blade. Based on this, it measures the distance between the end faces of the inner channel of the blade crown and the blade edge plate through multiple measuring holes and channel measuring pins located on the base. It also measures the profile using specially shaped blade back measuring templates and blade base measuring templates. Compared to traditional measurement systems, this device has a simple structure, low cost, and determines dimensional accuracy through direct contact between the measuring element and the blade. It is easy to operate, highly efficient, and suitable for widespread application.

Description

Technical Field

[0001] This utility model relates to a measuring tool for the processing of aero-engine blades, and more particularly to a measuring tool and equipment for the aero-engine blade channel and profile. Background Technology

[0002] The structure of an aero-engine blade includes the blade body and the blade crown and fin plates integrally formed at both ends of the blade body. The blade crown and fin plates are used to connect and fix the blade body, and their inner sides are planar structures. The distance between the inner planes of the blade crown and fin plates forms the blade passage of the aero-engine, while the back side and blade base side of the blade body are the profile surfaces.

[0003] Aero-engine blades are typically manufactured through integral casting. However, the surface finish of the castings is often inconsistent, leading to variations in the channel and profile dimensions of different blades, which fail to meet operational requirements. Therefore, aero-engine blade castings generally require manual polishing to achieve uniform and compliant channel and profile dimensions. Before and during the polishing process, the channel and profile dimensions must be repeatedly measured to prevent over-polishing from causing dimensional deviations and rendering the parts unusable.

[0004] Current technologies for measuring the profile and channel of aero-engine blades include laser scanning, spectral confocal scanning with a coordinate measuring machine (CMM) platform, and CAD model association. These methods offer high measurement accuracy, but suffer from drawbacks such as high system cost, complex operation, and long processing time, which increase the cost investment of manufacturing companies and reduce processing efficiency.

[0005] To this end, we have developed and designed a set of integrated measurement devices for the channels and profiles of aero-engine blades, combining practical processing experience with theoretical foundations. Utility Model Content

[0006] To address the aforementioned technical problems, this invention provides a measuring device for the blade passage and profile of an aero-engine. This invention features a simple structure, low cost, easy operation, high measurement efficiency and accuracy, reasonable design, and strong practicality.

[0007] The technical solution of this utility model:

[0008] A blade passage and profile measuring device for aero-engines comprises a base, a passage measuring device, and a profile measuring device.

[0009] The base includes a base plate, and a left channel measuring block, a leaf back clamping block and a right channel measuring block are spaced apart on the upper side of the base plate; a positioning pin is provided on the outer side of the left channel measuring block; and a leaf basin movable clamp that can move relative to the leaf back clamping block is provided between the left channel measuring block and the leaf back clamping block and between the leaf back clamping block and the right channel measuring block.

[0010] The channel measuring device includes three measuring holes 1 on the left channel measuring block, five measuring holes 2 on the right channel measuring block, and a movable block 1 and a movable block 2 located inside the left channel measuring block and inside the right channel measuring block, respectively. The movable block 1 has a vertical limiting surface 1 on the outer side of its bottom and three measuring holes 3 on the inner side of its top. The movable block 2 has a vertical limiting surface 2 on the outer side of its bottom and two measuring holes 4 on the inner side of its top. Channel measuring pins are connected through the measuring holes 1, 2, 3, and 4.

[0011] The profile measuring device includes 5 leaf back measuring templates and 5 leaf basin measuring templates. The inner side of each leaf back measuring template is provided with an arc-shaped concave surface that matches the leaf back profile of the corresponding segment, and the outer side of the bottom of each leaf back measuring template is provided with a vertical limiting surface three. The inner side of each leaf basin measuring template is provided with an arc-shaped convex surface that matches the leaf basin profile of the corresponding segment, and the outer side of the bottom of each leaf basin measuring template is provided with a vertical limiting surface four.

[0012] This solution positions and fixes the aero-engine blades using a base. Based on this, multiple measuring holes and channel measuring pins on the base are used to measure the distance between the blade crown and the inner channel end faces of the blade edge. Furthermore, specially shaped blade back and blade base measuring templates are used to measure the blade profile. Compared to traditional measurement systems, this solution's measuring device has a simple structure, low cost, and determines dimensional accuracy through direct contact between the measuring element and the blade. It is easy to operate, highly efficient, and suitable for widespread application.

[0013] Preferably, in the aforementioned aero-engine blade passage and profile measuring device, a limiting strip is provided on each of the front and rear sides of the upper end of the base plate, and the top surface and outer surface of the limiting strip both extend beyond the top surface and outer surface of the base plate; the bottom of the movable block one, movable block two, blade back measuring template and blade basin measuring template are provided with an upwardly extending overhead section, and the front end of the overhead section extends downward to form a support leg.

[0014] This solution reduces the interference of the base plate plane on measurement accuracy and improves measurement accuracy by setting up a limiting strip with a special structure and setting up a suspended part below the movable block 1, movable block 2, leaf back measurement template and leaf basin measurement template.

[0015] Preferably, in the aforementioned aero-engine blade passage and profile measuring device, the blade back clamping block and the right passage measuring block are both movably connected to the sinking hole on the upper surface of the base plate, and the front and rear sides of the blade back clamping block and the right passage measuring block are fixed by set screws passing through the wall of the sinking hole.

[0016] This design movably connects the blade back clamping block and the right channel measuring block to the base plate, allowing adjustment of their front-to-back and up-to-down positions. This enables real-time adjustment of the positioning and measurement position of the measuring instrument, resulting in a more reasonable design and greater practicality.

[0017] Preferably, in the aforementioned aero-engine blade passage and profile measuring device, the upper surface of the base plate is provided with two sliding grooves, the lower end of the blade basin movable clamp passes through the sliding groove and is connected to the lower part of the sliding groove via a rotating shaft, and a fastening screw is threaded on the side of the sliding groove, one end of the fastening screw contacts the outer side of the blade basin movable clamp, and the other end extends to the outer side of the base plate.

[0018] The leaf spring clamp in this design is adjusted for tightness using fastening screws, resulting in a simple structure and convenient operation.

[0019] Preferably, in the aforementioned aero-engine blade passage and profile measuring device, the end of the positioning pin is pointed.

[0020] The positioning pin in this design has a pointed end, resulting in a smaller contact area with the positioning point. It is less affected by the accuracy of the surrounding surface, making the positioning more precise and more practical.

[0021] Preferably, in the aforementioned aero-engine blade channel and profile measuring device, the end of the channel measuring pin that contacts the aero-engine blade is pointed.

[0022] The end of the channel measuring pin in this solution is pointed, resulting in a smaller contact area with the measuring point. This reduces the impact of the accuracy of the surrounding surface on the measuring point, leading to higher measurement accuracy.

[0023] Preferably, in the aforementioned aero-engine blade channel and profile measuring device, the end of the channel measuring pin away from the aero-engine blade is provided with a sinking platform.

[0024] Preferably, in the aforementioned aero-engine blade channel and profile measuring device, the extension length of the sinking platform in the channel measuring pin length direction is 0.2-0.5mm.

[0025] This solution uses a recessed platform at the end of the channel measuring pin to determine the tolerance of the machined surface, making channel inspection faster and more efficient.

[0026] The beneficial effects of this utility model are:

[0027] 1. This utility model uses a base to position and fix the aero-engine blade. Based on this, multiple measuring holes and channel measuring pins on the base are used to measure the distance between the end faces of the inner channels of the blade crown and the blade edge. Furthermore, specially shaped blade back measuring templates and blade base measuring templates are used to measure the blade profile. Compared to traditional measurement systems, the measuring device of this utility model has a simple structure, low cost, and determines dimensional accuracy through direct contact between the measuring element and the blade. It is easy to operate, highly efficient, and suitable for widespread application.

[0028] 2. This utility model reduces the interference of the base plate plane on the measurement accuracy by setting a limiting plate with a special structure and setting a suspended part below the movable block one, movable block two, leaf back measuring template and leaf basin measuring template, thereby improving the measurement accuracy.

[0029] 3. This utility model movably connects the leaf back clamping block and the right channel measuring block to the base plate, allowing adjustment of the front-back and up-down positions of the leaf back clamping block and the right channel measuring block. This enables real-time adjustment of the positioning and measurement position of the measuring instrument, resulting in a more reasonable design and greater practicality.

[0030] 4. The leaf basin movable clamp of this utility model is adjusted for tightness by fastening screws, which is simple in structure and easy to operate.

[0031] 5. The end of the positioning pin of this utility model is pointed, which reduces the contact area with the positioning point and makes it less affected by the accuracy of the surrounding surface of the positioning point, resulting in more accurate positioning and greater practicality.

[0032] 6. The end of the channel measuring pin of this utility model is pointed, which reduces the contact area with the measuring point and makes it less affected by the accuracy of the surface around the measuring point, resulting in higher measurement accuracy.

[0033] 7. This utility model uses a recessed platform at the end of the channel measuring pin to determine the tolerance of the machined surface, making channel inspection faster and more efficient. Attached Figure Description

[0034] Appendix Figure 1 This is a three-dimensional schematic diagram of the base of this utility model;

[0035] Appendix Figure 2 This is a top view of the base of this utility model;

[0036] Appendix Figure 3 This is a rear view of the base of this utility model;

[0037] Appendix Figure 4 This is a left view of the base of this utility model;

[0038] Appendix Figure 5 This is a right view of the base of this utility model;

[0039] Appendix Figure 6 This is a front view of the movable block one of this utility model;

[0040] Appendix Figure 7 This is the left view of the active block after it has been placed in the base;

[0041] Appendix Figure 8 This is a front view of the movable block two of this utility model;

[0042] Appendix Figure 9 This is the right view of the movable block 2 after it has been placed in the base;

[0043] Appendix Figure 10 This is a front view of the channel measuring pin of this utility model;

[0044] Appendix Figure 11 A schematic diagram of inserting the measuring pin into the measuring hole to measure the inner surface channel of the blade crown;

[0045] Appendix Figure 12 This is the front view of the leaf back measuring template of this utility model;

[0046] Appendix Figure 13 This is the front view of the leaf basin measuring template of this utility model;

[0047] Appendix Figure 14 This is a schematic diagram showing the structure of the leaf back measuring template and leaf basin measuring template of this utility model when they are in contact with the back side of the leaf and the side of the basin.

[0048] Explanation of reference numerals in the attached diagram: 1-Base, 2-Left channel measuring block, 3-Blade back clamping block, 4-Right channel measuring block, 5-Positioning pin, 6-Measuring hole one, 7-Measuring hole two, 8-Blade basin movable clamp, 9-Limiting strip, 10-Moving block one, 11-Measuring hole three, 12-Moving block two, 13-Measuring hole four, 14-Channel measuring pin, 15-Sinking platform, 16-Blade back measuring template, 17-Arc-shaped concave surface, 18-Limiting surface three, 19-Blade basin measuring template, 20-Arc-shaped convex surface, 21-Limiting surface four, 22-Limiting surface one, 23-Limiting surface two, 24-Sinking hole, 25-Setting screw, 26-Fasting screw, 27-Slide groove, 28-Rotating shaft, 29-Overhead section, 30-Supporting leg, 31-Blade body, 32-Blade crown. Detailed Implementation

[0049] The present invention will be further described below with reference to the embodiments, but this should not be construed as limiting the present invention.

[0050] Embodiments of this utility model

[0051] An aero-engine blade passage and profile measuring tool, as shown in the attached document. Figure 1-14As shown, it consists of a base, a channel measuring device, and a profile measuring device;

[0052] The base includes a rectangular base plate 1. A left channel measuring block 2, a leaf back clamping block 3, and a right channel measuring block 4 are spaced apart on the upper side of the base plate 1. A positioning pin 5 is provided on the outer side of the left channel measuring block 2. The distance between the distal end of the left channel measuring block 2 and the tip of the positioning pin 5 is 28.163±0.01mm. The distance between the proximal end of the leaf back clamping block 3 and the tip of the positioning pin 5 is 56.103±0.01mm, and the distance between the distal end of the leaf back clamping block 3 and the tip of the positioning pin 5 is 84.043±0.01mm. The distance between the proximal limiting point of the right channel measuring block 4 and the tip of the positioning pin 5 is 111.983±0.01mm, and the distance between the distal end of the right channel measuring block 4 and the tip of the positioning pin 5 is 139.932±0.01mm. A movable leaf basin clamp 8, capable of moving back and forth relative to the leaf back clamping block 3, is provided between the left channel measuring block 2 and the leaf back clamping block 3, and between the leaf back clamping block 3 and the right channel measuring block 4.

[0053] The channel measuring device includes three measuring holes 6 on the left channel measuring block 2, five measuring holes 7 on the right channel measuring block 4, a movable block 10 inside the left channel measuring block 2, and a movable block 12 inside the right channel measuring block 4. The movable block 10 has a vertical limiting surface 22 on the outer side of its bottom and three measuring holes 11 on the inner side of its top. The movable block 12 has a vertical limiting surface 23 on the outer side of its bottom and two measuring holes 13 on the inner side of its top. A channel measuring pin 14 is connected through the measuring holes 6, 7, 11, and 13. The inner diameters of the measuring holes 6, 7, 11, and 13 are the same, and the channel measuring pin 14 is inserted into the measuring holes without wobbling.

[0054] The profile measuring device includes five blade back measuring templates 16 and five blade basin measuring templates 19. The inner side of each blade back measuring template 16 is provided with an arc-shaped concave surface 17 that is consistent with the blade back profile of the corresponding segment, and the outer side of the bottom of the blade back measuring template 16 is provided with a vertical limiting surface three 18. The inner side of each blade basin measuring template 19 is provided with an arc-shaped convex surface 20 that is consistent with the blade basin profile of the corresponding segment, and the outer side of the bottom of the blade basin measuring template 19 is provided with a vertical limiting surface four 21. The shapes and curvatures of the arc-shaped concave surfaces 17 and arc-shaped convex surfaces 20 on the five blade back measuring templates 16 and the blade basin measuring templates 19 are not consistent. They are designed according to the changes in the profile of the blade body 31 along its length and according to the morphology of both sides of the blade body 31 in the fixed measuring segment.

[0055] In this embodiment, the actual measurement steps are as follows:

[0056] Base fixing:

[0057] S1. First, flip the leaf pot movable clamp 8 outward to its maximum distance;

[0058] S2. Place the aero-engine blade 1 between the blade basin movable clamp 8 and the blade back clamp 3. The inner side of the blade crown 32 on the left side contacts the end of the positioning pin 5 to form the first positioning point. The lower side of the left end of the blade 31 is placed on the step of the left channel measuring block 2 and moved backward to form the second positioning point. The blade back in the middle of the blade 31 rests on the blade back clamp 3 to form the third positioning point. The lower side of the right end of the blade 31 is placed on the step of the right channel measuring block 4 and moved backward to form the fourth positioning point. Then, adjust the blade basin movable clamp 8 to contact the blade basin side of the blade 31 and clamp the blade 31 to form the fifth and sixth positioning points respectively. The aero-engine blade is fixed and positioned through the above 6 positioning points.

[0059] Channel measurement:

[0060] S1. Insert the channel measuring pin 14 into the measuring hole 6 from the inside out of the left channel measuring block 2, so that the end of the channel measuring pin 14 contacts the inner surface of the blade crown 32, as shown in the attached diagram. Figure 11 As shown, the tolerance of the inner surface of the blade crown 32 is judged by the scale reserved on the channel measuring pin 14. If the scale at the rightmost end of the measuring pin 14 is completely inserted into the measuring hole 6, it indicates that the inner surface of the blade crown 32 at that channel measuring point has been over-ground, which may lead to the scrapping of the part. If the scale at the leftmost end of the channel measuring pin 14 is still not inserted into the measuring hole 6, it indicates that the inner surface of the blade crown 32 at that channel measuring point has not been ground properly. After recording, it should be re-ground. According to the aforementioned method, the tolerance of the inner surface of the blade crown 32 at that channel measuring point should be judged in turn. Figure 7 The measurements are taken at the channel points inside the leaf crown 32 corresponding to the three channel measurement points V4, V5 and V6 on the left channel measurement block 2 shown.

[0061] S2. After measuring V4, V5, and V6, insert the movable block 10 from the front of the base plate 1 and press it onto the base plate 1. The limiting surface 22 should be tightly fitted with the side of the base plate 1, and the side of the movable block 10 should be tightly in contact with the inner side of the left channel measuring block 2. Then, according to the method in S1, insert the channel measuring pin 14 into the measuring hole 11 and measure the attached... Figure 7 The channel points corresponding to the three channel measurement points V1, V2, and V3 shown in the figure;

[0062] S3. Following the method in S1, insert the channel measuring pin 14 sequentially into the measuring hole 7 from the inside of the right channel measuring block 4, so that its end contacts the inner side of the rim plate at the other end of the aero-engine blade. The structure of the rim plate is similar to that of the blade crown 32, but is not shown in the attached figure. Its inner side is planar, the difference being that it is located at the opposite ends of the blade body 31 to the blade crown 32. After the above operations, for example... Figure 9The inner side channel points of the flange corresponding to the five channel measurement points V7, V8, V9, V12 and V13 shown are measured;

[0063] S4. Finally, following the method in S2, insert movable block 212 from the front side of base plate 1 and press it onto base plate 1. Limiting surface 23 should be tightly fitted to the side of base plate 1, and the side of movable block 212 should be in close contact with the inner side of right channel measuring block 4. Then, insert channel measuring pin 14 into measuring hole 4 13 to measure the attached... Figure 9 The channel points corresponding to the two channel measurement points V10 and V11 shown in the figure;

[0064] S5. When the tolerances of the channel points corresponding to the aforementioned 12 measurement points V1-V12 are all within the error range, it indicates that the channel size of the aero-engine blade has met the requirements.

[0065] Profile measurement:

[0066] S1. As Figure 2 As shown in the lines connecting A1-A1, A2-A2, A3-A3, A4-A4 and A5-A5, during the profile measurement, the five leaf basin measurement templates 19 and leaf back measurement templates 16 are placed on the lines connecting A1-A1, A2-A2, A3-A3, A4-A4 and A5-A5 respectively, and the leaf basin measurement templates 19 and leaf back measurement templates 16 of the corresponding segments are numbered in advance;

[0067] S2. When measuring the blade back profile, first insert the blade back measuring template 16 corresponding to A1-A1 from the rear side of the base plate 1 and place it on the base plate 1. Its side surface should be in close contact with the outer side of the right channel measuring block 4, and the limiting surface 18 should be in close contact with the side surface of the base plate 1, as shown in the attached figure. Figure 13 As shown, at this time, use a light to illuminate the contact surface between the arc-shaped concave surface 17 and the back side of the blade 31 from one side of the measuring template 16 on the back of the blade. Then observe the light transmission width of the contact surface from the other side. When the light transmission width is less than the light transmission width of the standard part surface, continue polishing until the usage requirements are met. When the light transmission width is greater than the light transmission width of the standard part surface, it may cause the blade to be scrapped.

[0068] S3. Following the method in S2, select the corresponding segments A2-A2, A3-A3, A4-A4 and A5-A5 in sequence to measure the shape of the back side of the blade 1 of that segment.

[0069] S4. Following the method in S2, select the corresponding segment of the leaf basin measurement template 19 to measure the profile of the leaf basin side.

[0070] Further implementation, for example, is attached. Figure 1-14As shown, a limiting strip 9 is provided on each of the front and rear sides of the upper end of the base plate 1. The top and outer surfaces of the limiting strip 9 extend beyond the top and outer surfaces of the base plate 1. The bottom of the movable block 10, movable block 22, leaf back measuring template 16, and leaf basin measuring template 19 are provided with an upwardly extending overhead section 29. The front end of the overhead section 29 extends downward to form a support leg 30. The support height of the support leg 30 is sufficient to keep the movable block 10, movable block 22, leaf back measuring template 16, and leaf basin measuring template 19 horizontal and not tilted. This reduces the contact area between the bottom and inner sides of the movable block 10, movable block 22, leaf back measuring template 16, and leaf basin measuring template 19 and the upper and side surfaces of the base plate 1, thereby reducing errors caused by the unevenness of the base plate 1 surface.

[0071] Further implementation, for example, is attached. Figure 1-14 As shown, the blade back clamping block 3 and the right channel measuring block 4 are both movably connected to the recessed hole 24 on the upper surface of the base plate 1. The front and rear sides of the blade back clamping block 3 and the right channel measuring block 4 are fixed by set screws 25 passing through the wall of the recessed hole 24. When the size of the aero-engine blade changes, the set screws 25 can be loosened to adjust the up-down and front-back positions of the blade back clamping block 3 and the right channel measuring block 4 in the recessed hole 24. After adjustment, the set screws 25 can be tightened to fix them.

[0072] Further implementation, for example, is attached. Figure 1-14 As shown, the upper surface of the base plate 1 is provided with two sliding grooves 27. The lower end of the blade basin movable clamp 8 passes through the sliding groove 27 and is connected to the lower part of the sliding groove 27 via a rotating shaft 28. A fastening screw 26 is threadedly connected to the side of the sliding groove 27. One end of the fastening screw 26 contacts the outer side of the blade basin movable clamp 8, and the other end extends to the outer side of the base plate 1. The sliding groove 27 is a through hole that runs vertically through the base plate 1. In order to reduce the overall weight of the base plate 1, the lower part of the base plate 1 is hollowed out. When it is necessary to open the blade basin movable clamp 8, the fastening screw 26 is rotated to move it away from the blade basin movable clamp 8. At this time, the blade basin movable clamp 8 loses its force and tilts backward, thereby completing the opening action. After the aero-engine blade is placed, the fastening screw 26 is rotated in the opposite direction, pushing the blade basin movable clamp 8 towards the blade body 31 until the blade body 31 is completely pressed.

[0073] Further implementation, for example, is attached. Figure 1-14 As shown, the end of the positioning pin 5 is pointed, specifically a domed pointed shape.

[0074] Further implementation, for example, is attached. Figure 1-14 As shown, the end of the channel measuring pin 14 that contacts the aero-engine blade is pointed, specifically a domed pointed end.

[0075] Further implementation, for example, is attached. Figure 1-14As shown, the end of the channel measuring pin 14 furthest from the aero-engine blade is provided with a recessed platform 15; preferably, the extension length of the recessed platform 15 in the length direction of the channel measuring pin 14 is 0.2-0.5mm. 0.2-0.5mm is the maximum error range of the channel measuring point, that is, ±0.25mm. When the recessed platform 15 enters the measuring hole but does not fully enter, the surface channel measuring point meets the requirements. When the recessed platform 15 does not enter the measuring hole at all, the surface needs to be further polished. When the recessed platform 15 fully enters the measuring hole, but its top still does not contact the channel measuring point, it indicates that the polishing is excessive.

[0076] The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be included within the protection scope of the present invention.

Claims

1. An aeroengine blade path and profile gauging apparatus characterised in that: It consists of a base, a channel measuring device, and a profile measuring device; The base includes a base plate (1), and a left channel measuring block (2), a leaf back clamping block (3) and a right channel measuring block (4) are spaced apart on the upper side of the base plate (1); a positioning pin (5) is provided on the outer side of the left channel measuring block (2); a leaf basin movable clamp (8) that can move relative to the leaf back clamping block (3) is provided between the left channel measuring block (2) and the leaf back clamping block (3) and between the leaf back clamping block (3) and the right channel measuring block (4); The channel measuring device includes three measuring holes (6) on the left channel measuring block (2), five measuring holes (7) on the right channel measuring block (4), a movable block (10) inside the left channel measuring block (2), and a movable block (22) inside the right channel measuring block (4); the movable block (10) has a vertical limiting surface (22) on the outer side of its bottom and three measuring holes (11) on the inner side of its top; the movable block (22) has a vertical limiting surface (23) on the outer side of its bottom and two measuring holes (13) on the inner side of its top; a channel measuring pin (14) is connected through the measuring holes (6), (7), (11), and (13); The profile measuring device includes 5 blade back measuring templates (16) and 5 blade basin measuring templates (19). The inner side of the blade back measuring template (16) is provided with an arc-shaped concave surface (17) that is consistent with the blade back profile of the corresponding segment. The outer side of the bottom of the blade back measuring template (16) is provided with a vertical limiting surface three (18). The inner side of the blade basin measuring template (19) is provided with an arc-shaped convex surface (20) that is consistent with the blade basin profile of the corresponding segment. The outer side of the bottom of the blade basin measuring template (19) is provided with a vertical limiting surface four (21).

2. The aeroengine blade path and profile gage apparatus of claim 1, wherein: The base plate (1) has a limiting strip (9) on each of its front and rear sides. The top surface and outer surface of the limiting strip (9) both extend beyond the top surface and outer surface of the base plate (1). The bottom of the movable block 1 (10), movable block 2 (12), leaf back measuring template (16) and leaf basin measuring template (19) are provided with an upwardly extending overhead section (29). The front end of the overhead section (29) extends downward to form a support leg (30).

3. The aeroengine blade path and profile gage apparatus of claim 1, wherein: The blade back clamp (3) and the right channel measuring block (4) are both movably connected to the sinkhole (24) on the upper surface of the base plate (1). The blade back clamp (3) and the right channel measuring block (4) are fixed on the front and rear sides by the set screw (25) passing through the hole wall of the sinkhole (24).

4. The aeroengine blade path and profile gage apparatus of claim 1, wherein: The upper surface of the base plate (1) is provided with two sliding grooves (27). The lower end of the leaf basin movable clamp (8) passes through the sliding groove (27) and is connected to the lower part of the sliding groove (27) via a rotating shaft (28). The side of the sliding groove (27) is threaded with a fastening screw (26). One end of the fastening screw (26) contacts the outer side of the leaf basin movable clamp (8), and the other end extends to the outer side of the base plate (1).

5. The aeroengine blade path and profile gage apparatus of claim 1, wherein: The end of the positioning pin (5) is pointed.

6. The aeroengine blade path and profile gage apparatus of claim 1, wherein: The end of the channel measuring pin (14) that contacts the aero-engine blade is pointed.

7. The aeroengine blade path and profile gage apparatus of claim 1, wherein: The channel measuring pin (14) is provided with a sunken platform (15) at one end away from the aero-engine blade.

8. The aeroengine blade path and profile gage apparatus of claim 7, wherein: The sunken platform (15) has an extension length of 0.2-0.5 mm in the length direction of the channel measuring pin (14).

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