Aero-engine cone positioning device and surface coating shedding area detection method

Abstract

The invention relates to an aero-engine cone positioning device and a surface coating falling area detection method, and belongs to the technical field of engine cone detection. Comprising a supporting seat, a first positioning mechanism and a second positioning mechanism are installed on the supporting seat, and the second positioning mechanism is located above the first positioning mechanism; an air cylinder is further installed on the supporting base and used for controlling the second positioning mechanism to be close to or away from the first positioning mechanism. The side, close to the supporting base, of the first positioning mechanism is installed on the supporting base, the first positioning mechanism comprises a first limiting body, an installation part and a rubber part, the installation part is installed at the end, close to the second positioning mechanism, of the first limiting body and rotationally connected with the first limiting body, and the outer surface of the installation part is sleeved with the rubber part; through the arrangement of the first positioning mechanism and the second positioning mechanism, the problem that in the prior art, during measurement, the overall stability of the cone is low, and consequently the measurement accuracy of the surface falling area of the cone is low is solved.

Description

Technical Field

[0001] The invention relates to the technical field of engine cone detection, and in particular to an aircraft engine cone positioning device and a surface coating shedding area detection method. Background Art

[0002] When the engine is used in the aviation field, it is necessary to apply material on the outer surface of the engine cone. After applying the material, the coating formed on the outer surface of the cone can effectively shield radar signals.

[0003] After a coated cone is used for a long time, the coating on the outer surface of the cone will fall off. Therefore, it is necessary to regularly inspect the coating on the outer surface of the cone, mainly to measure the falling area in order to determine whether the total falling area has reached the standard that requires re-coating. However, in the prior art, since the outer surface of the cone is smooth and curved, the positioning piece used for measurement and fixation cannot completely fit the cone. During measurement, the overall stability of the cone is low, resulting in low accuracy in measuring the falling area on the cone surface. Summary of the invention

[0004] The present invention provides an aircraft engine cone positioning device and a surface coating peeling area detection method, which solves the problem in the prior art that the outer surface of the cone is smooth and curved, so the positioning piece used for measurement and fixing cannot completely fit the cone during measurement.

[0005] The present invention is achieved through the following technical solutions:

[0006] A cone positioning device for an aircraft engine, used for positioning a cone to be detected, comprises a support seat, a first positioning mechanism and a second positioning mechanism are installed on the support seat, and the second positioning mechanism is located above the first positioning mechanism; a cylinder is also installed on the support seat, and the cylinder is used to control the second positioning mechanism to approach or move away from the first positioning mechanism; the first positioning mechanism is installed on the support seat at a side close to the support seat, and the first positioning mechanism comprises a first limiting body, a mounting portion and a rubber member, the mounting portion is installed at one end of the first limiting body close to the second positioning mechanism, and is rotatably connected to the first limiting body, the rubber member is sleeved on the outer surface of the mounting portion, and is fixed to the mounting portion; the rubber member is truncated cone-shaped ; The diameter of the rubber piece is smaller than the diameter of the notch at the large diameter end of the cone, and the cone is sleeved on the first positioning mechanism through the notch at the large diameter end of the cone; when the first positioning mechanism is positioned, the outer wall of the rubber piece abuts against the inner wall of the cone, and the rubber piece is used for the initial positioning of the cone; the second positioning mechanism includes a second limiting body and a positioning column, and the side of the second limiting body close to the support seat is slidably connected to the support seat through a slide groove under the action of the cylinder, and the positioning column is installed on the side of the second limiting body close to the first positioning mechanism, and is rotatably connected to the second limiting body; when the second positioning mechanism is positioned, the positioning column enters the interior of the cone through the notch at the small diameter end of the cone under the action of the cylinder, and the positioning column is used for the secondary positioning of the cone.

[0007] Furthermore, a first storage groove is provided at one end of the mounting portion close to the second limiting body, and a first airbag structure is installed inside the first storage groove; the first airbag structure includes a first airbag layer and multiple second airbag layers, the first airbag layer and the multiple second airbag layers form a closed first airbag structure, the multiple second airbag layers are connected to the first airbag layer, and the multiple second airbag layers are integrally formed with the first airbag layer; the multiple second airbag layers are arranged around the first airbag layer, and the mounting portion is provided with multiple notches corresponding to the second airbag layers one by one, and each second airbag layer passes through the corresponding notch to limit the mounting portion; an extrusion structure is installed at one end of the positioning column close to the first limiting body; during positioning, the extrusion structure contacts the first airbag structure and extrudes the first airbag structure.

[0008] Furthermore, a limiting column is installed inside the mounting part, and the limiting column is located directly below the positioning column. A sleeve hole matching the limiting column is opened on the first airbag structure, and the first airbag structure is sleeved on the limiting column through the sleeve hole; a pushing sleeve is sleeved on the limiting column, and the pushing sleeve is slidably connected to the limiting column through a reset spring, and a first extrusion plate is installed on the pushing sleeve; the outer diameter of the first extrusion plate is larger than the diameter of the sleeve hole; the extrusion structure is a sleeve, and the inner diameter of the sleeve is larger than the outer diameter of the pushing sleeve; when positioning, the sleeve is sleeved on the outer surface of the pushing sleeve.

[0009] Furthermore, a first external thread is arranged on the outer surface of the pushing sleeve, and the first extrusion plate is threadably connected to the pushing sleeve via the first external thread.

[0010] Further, the first airbag structure includes a first airbag layer, a plurality of second airbag layers, a third airbag layer and a plurality of fourth airbag layers;

[0011] The third airbag layer is arranged at the center of the first airbag layer, and the thickness of the third airbag layer is less than that of the first airbag layer; each of the fourth airbag layers is arranged at the center of the corresponding second airbag layer close to the inner wall of the cone, and the thickness of the fourth airbag layer is less than that of the second airbag layer.

[0012] Furthermore, a storage piece is detachably connected to the first limiting body, and the storage piece is fixed to the mounting part through a connecting piece, and the outer diameter of the storage piece is smaller than the outer diameter of the mounting part; a second storage groove is provided at one end of the storage piece away from the mounting part, and a second airbag structure is installed inside the second storage groove; the storage piece and the second airbag structure are both mounted on the pushing sleeve; a second extrusion plate is installed on the pushing sleeve, and the second extrusion plate is located above the second airbag structure; a second external thread is arranged on the outer surface of the pushing sleeve, and the second extrusion plate is threadedly connected to the pushing sleeve through the second external thread.

[0013] Further, a plurality of the second airbag layers are equidistantly distributed around the outer periphery of the first airbag layer.

[0014] Furthermore, a reduction motor is installed inside the first limiting body, and an output end of the reduction motor is fixedly connected to the mounting portion.

[0015] Furthermore, an elastic sleeve is provided on the outer surface of the positioning column.

[0016] A method for detecting the surface coating shedding area of ​​an aircraft engine cone comprises the following steps:

[0017] S1: Adjustment of the cone, control the cone to rotate 90° at a time, divide the cone into four sides, and calculate the shedding area;

[0018] S2: The area recording method of the intersection of the four dividing lines. For the shedding area divided by the four intersection lines, the area of ​​the intersection on one side is recorded at a time, and the intersections recorded four times are all on the same side;

[0019] S3: Calculation of the shedding area: According to the shape of the shedding area on the cone surface, the irregular shedding area is calculated by using a calculation method similar to a circle or a triangle.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] By providing a first positioning mechanism and a second positioning mechanism, the problem in the prior art that when positioning the cone to be tested, the positioning member used for measurement and fixation cannot completely fit the cone during measurement because the outer surface of the cone is smooth and curved, resulting in low overall stability of the cone during measurement, resulting in low accuracy in measuring the detached area of ​​the cone surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a structural schematic diagram of an aircraft engine cone positioning device;

[0024] Figure 2 for Figure 1 A state diagram after the second positioning mechanism moves toward the first positioning mechanism;

[0025] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0026] Figure 4 for Figure 1 A three-dimensional diagram of the first positioning mechanism;

[0027] Figure 5 for Figure 4 Schematic diagram of the structure;

[0028] Figure 6 for Figure 5 Sectional view of AA in the middle;

[0029] Figure 7 is an isometric cross-sectional view of a first positioning mechanism;

[0030] Figure 8 for Figure 7 A schematic structural diagram of the first airbag structure;

[0031] Fig. 9 for Figure 8 A schematic diagram of the structure of the first airbag after the improvement;

[0032] Fig.10 for Figure 6 A schematic diagram of the structure of the first positioning mechanism after further improvement;

[0033] Fig.11 for Fig.10Enlarged view of point B in the middle.

[0034] Reference numerals:

[0035] 10. Support seat; 20. First limiting body; 201. Speed ​​reduction motor; 21. Mounting part; 211. Rubber part; 212. First storage slot; 213. Limiting column; 22. Push sleeve; 221. First extrusion plate; 222. First external thread; 223. Return spring; 224. Second external thread; 225. Second extrusion plate; 23. First airbag structure; 231. First airbag layer; 232. Second airbag layer; 233. Sleeve hole; 234. Third airbag layer; 235. Fourth airbag layer; 24. Storage part; 241. Connecting part; 242. Second storage slot; 25. Second airbag structure; 30. Second limiting body; 31. Cylinder; 32. Positioning column; 321. Sleeve; 40. Cone. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] The embodiments of the present application provide an aircraft engine cone positioning device and a method for detecting the surface coating detachment area, thereby solving the problem in the prior art that, due to the smooth and curved outer surface of the cone, a fixed positioning piece used for measurement cannot completely fit the cone during measurement, thereby improving the accuracy of detecting the detachment area on the cone surface.

[0038] The technical solution in the embodiment of the present application is to solve the above technical problems, and the overall idea is as follows:

[0039] In the prior art, after a coated cone is used for a long time, the coating on the outer surface of the cone will fall off. Therefore, it is necessary to regularly inspect the coating on the outer surface of the cone, mainly to measure the falling area in order to determine whether the total falling area has reached the standard that requires re-coating. However, since the outer surface of the cone is smooth and curved, the positioning piece used for measurement and fixation cannot completely fit the cone. During measurement, the overall stability of the cone is low, resulting in low accuracy in measuring the falling area on the cone surface.

[0040] The research found that Figure 1-Figure 11As shown, by setting the first positioning mechanism and the second positioning mechanism, the problem in the prior art that when positioning the cone to be tested, the positioning piece used for measurement and fixation cannot completely fit the cone during measurement because the outer surface of the cone is smooth and curved, and the overall stability of the cone is low during measurement, resulting in low accuracy in measuring the detached area of ​​the cone surface.

[0041] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0042] like Figure 1-Figure 4 As shown, an aircraft engine cone positioning device is used to position a cone 40 to be detected, including a support seat 10;

[0043] The support seat 10 is provided with a first positioning mechanism and a second positioning mechanism, wherein the second positioning mechanism is located above the first positioning mechanism;

[0044] The support base 10 is also provided with a cylinder 31, which is used to control the second positioning mechanism to approach or move away from the first positioning mechanism;

[0045] The first positioning mechanism is installed with the support seat 10 at one side close to the support seat 10, and the first positioning mechanism includes a first limiting body 20, a mounting portion 21 and a rubber member 211, the mounting portion 21 is installed at one end of the first limiting body 20 close to the second positioning mechanism, and is rotatably connected to the first limiting body 20, and the rubber member 211 is sleeved on the outer surface of the mounting portion 21 and fixed to the mounting portion 21;

[0046] The diameter of the rubber member 211 is smaller than the diameter of the notch at the large diameter end of the cone 40, and the cone 40 is sleeved on the first positioning mechanism through the notch at the large diameter end of the cone 40;

[0047] When the first positioning mechanism is positioned, the outer wall of the rubber member 211 abuts against the inner wall of the cone 40, and the rubber member 211 is used for the initial positioning of the cone 40;

[0048] The second positioning mechanism includes a second limiting body 30 and a positioning column 32. The side of the second limiting body 30 close to the support seat 10 is slidably connected to the support seat 10 through a slide groove under the action of the cylinder 31. The positioning column 32 is installed on the side of the second limiting body 30 close to the first positioning mechanism and is rotatably connected to the second limiting body 30.

[0049] When the second positioning mechanism is positioned, the positioning post 32 enters the interior of the cone 40 through the notch at the small diameter end of the cone 40 under the action of the cylinder 31 , and the positioning post 32 is used for the secondary limiting of the cone 40 .

[0050] Specifically, when setting the rubber member 211, the rubber member 211 can be set to a truncated cone shape to further improve the fit between the rubber member 211 and the inner wall of the cone 40. The outer surface of the positioning column 32 is covered with an elastic sleeve to prevent the positioning column 32 from causing damage to the inner wall of the cone 40.

[0051] By setting a first positioning mechanism and a second positioning mechanism, the cone 40 is initially positioned by using the first positioning mechanism, and a secondary positioning is performed after the initial positioning by using the second positioning mechanism;

[0052] When the first positioning mechanism positions the cone 40, the rubber member 211 provided on the first positioning mechanism is located inside the cone 40 and abuts against the inner wall of the cone 40, so that the first positioning mechanism initially positions the cone 40. Since the rubber member 211 used for positioning is located inside the cone 40 when the cone 40 is positioned by the first positioning mechanism, and since the rubber member 211 is deformable, when the cone 40 is positioned by the rubber member 211, the position where the rubber member 211 contacts the inner wall of the cone 40 can be completely fitted with the inner wall of the cone 40, thereby solving the problem in the prior art that when the cone 40 to be tested is positioned, the outer surface of the cone 40 is smooth and curved, and the positioning member used for measurement and fixing cannot be completely fitted with the cone 40 during measurement. During measurement, the overall stability of the cone 40 is low, resulting in low accuracy in measuring the falling-off area of ​​the cone 40 surface.

[0053] At the same time, when the first positioning mechanism and the second positioning mechanism are set, the components of the first positioning mechanism and the second positioning mechanism for positioning the cone 40 are all located inside the cone 40, and will not contact the outer surface of the cone 40, and thus will not block the outer surface, thereby preventing the positioning components from contacting the outer surface of the cone 40 when the first positioning mechanism and the second positioning mechanism are positioning the cone 40, resulting in incomplete detection of the falling area of ​​the outer surface of the cone 40, leading to errors in the detection results;

[0054] During operation, the mounting portion 21 is controlled to rotate, thereby driving the cone 40 to rotate, thereby facilitating a comprehensive inspection of the outer surface of the cone 40 .

[0055] like Figure 6 As shown, a reduction motor 201 is installed inside the first limit body 20, and the output end of the reduction motor 201 is fixedly connected to the mounting portion 21. The reduction motor 201 is used to control the single rotation angle of the cone 40 after positioning, so as to facilitate the detection of the detachment area of ​​the cone 40 surface.

[0056] Based on the above technical solution, Figure 1-Figure 8As shown, the end of the mounting portion 21 close to the second limiting body 30 is provided with a first storage groove 212, and the first airbag structure 23 is installed inside the first storage groove 212;

[0057] The first airbag structure 23 includes a first airbag layer 231 and a plurality of second airbag layers 232. The first airbag layer 231 and the plurality of second airbag layers 232 form a closed first airbag structure 23. The plurality of second airbag layers 232 are all connected to the first airbag layer 231, and the plurality of second airbag layers 232 are integrally formed with the first airbag layer 231.

[0058] A plurality of the second airbag layers 232 are arranged around the first airbag layer 231, and a plurality of slots corresponding to the second airbag layers 232 are opened on the mounting portion 21, and each of the second airbag layers 232 passes through the corresponding slot and is limited by the mounting portion 21;

[0059] The end of the positioning column 32 close to the first limiting body 20 is equipped with an extrusion structure;

[0060] During positioning, the extrusion structure contacts the first airbag structure 23 and extrudes the first airbag structure 23 .

[0061] Specifically, the plurality of second airbag layers 232 are equidistantly distributed around the outer periphery of the first airbag layer 231 , thereby improving the stability between the plurality of second airbag layers 232 and the cone 40 when the plurality of second airbag layers 232 are in contact with the cone 40 .

[0062] By setting a mounting portion 21 on the first limiting body 20, and setting a first airbag structure 23 inside the mounting portion 21, and setting the first airbag structure 23 to be composed of a first airbag layer 231 and a plurality of second airbag layers 232, during positioning, after the first positioning mechanism and the second positioning mechanism perform initial positioning and secondary positioning on the cone 40, the cylinder 31 continues to control the positioning column 32 to move toward the direction of the first limiting body 20 inside the cone 40. During the movement, the extrusion structure on the positioning column 32 gradually contacts and squeezes the first airbag structure 23. After the first airbag structure 23 is squeezed by the extrusion structure, the second airbag layer 232 on the first airbag structure 23 gradually fits with the inner wall of the cone 40, thereby strengthening the fit between the first positioning mechanism and the cone 40, and further improving the overall stability of the cone 40 after the cone 40 is positioned.

[0063] like Figure 1-Figure 8 As shown, a limiting column 213 is installed inside the mounting portion 21, and the limiting column 213 is located directly below the positioning column 32. A sleeve hole 233 adapted to the limiting column 213 is opened on the first airbag structure 23, and the first airbag structure 23 is sleeved on the limiting column 213 through the sleeve hole 233;

[0064] The limiting column 213 is sleeved with a push sleeve 22, and the push sleeve 22 is slidably connected to the limiting column 213 via a return spring 223, and a first extrusion plate 221 is installed on the push sleeve 22;

[0065] The outer diameter of the first extrusion plate 221 is larger than the diameter of the sleeve hole 233;

[0066] The extrusion structure is a sleeve 321, and the inner diameter of the sleeve 321 is greater than the outer diameter of the push sleeve 22;

[0067] During positioning, the sleeve 321 is sleeved on the outer surface of the push sleeve 22 .

[0068] By setting a first extrusion plate 221, a limiting column 213, a pushing sleeve 22 and a reset spring 223, and utilizing the sleeve 321 to squeeze the first extrusion plate 221, the first extrusion plate 221 can be used to squeeze the first airbag structure 23. The outer diameter of the first extrusion plate 221 is set to be larger than the diameter of the sleeve hole 233, and the first airbag structure 23 is sleeved on the limiting column 213, so that the first extrusion plate 221 can limit the first airbag structure 23, thereby preventing the first airbag structure 23 from moving when being squeezed, and improving the stability of the first airbag structure 23 limiting the cone 40 when being squeezed.

[0069] It should be noted that, by setting the position of the first squeezing plate 221 on the pushing sleeve 22 and the sliding distance of the pushing sleeve 22 on the limiting column 213 , it is possible to ensure that the first squeezing plate 221 fully squeezes the first airbag structure 23 .

[0070] Specifically, a first external thread 222 is arranged on the outer surface of the push sleeve 22, and the first extrusion plate 221 is threadedly connected to the push sleeve 22 through the first external thread 222, thereby facilitating the disassembly of the first extrusion plate 221, and then facilitating the first airbag structure 23 to be separated from the interior of the first storage groove 212, thereby realizing the replacement operation of the first airbag structure 23.

[0071] like Figure 8-Figure 9 As shown, the first airbag structure 23 includes a first airbag layer 231, a plurality of second airbag layers 232, a third airbag layer 234 and a plurality of fourth airbag layers 235;

[0072] The third airbag layer 234 is arranged at the center of the first airbag layer 231, and the thickness of the third airbag layer 234 is less than the thickness of the first airbag layer 231;

[0073] Each of the fourth airbag layers 235 is disposed at the center of a corresponding second airbag layer 232 close to the inner wall of the cone 40 , and the thickness of the fourth airbag layer 235 is less than the thickness of the second airbag layer 232 .

[0074] By setting the first airbag structure 23 in a closed form composed of a first airbag layer 231, multiple second airbag layers 232, a third airbag layer 234 and multiple fourth airbag layers 235, and setting the thickness close to the inner wall of the cone 40 and the thickness in contact with the first extrusion plate 221 to be thinner than other places, it is possible to ensure the overall stability of the first airbag structure 23 while facilitating the contact of the multiple fourth airbag layers 235 with the inner wall of the cone 40.

[0075] like Figure 10-11 As shown, the first limiting body 20 is detachably connected with a placement piece 24, and the placement piece 24 is fixed to the mounting portion 21 via a connection piece 241;

[0076] The storage element 24 has a second storage groove 242 at one end away from the mounting portion 21, and a second airbag structure 25 is installed inside the second storage groove 242;

[0077] The object placement member 24 and the second airbag structure 25 are both sleeved on the push sleeve 22;

[0078] The push sleeve 22 is provided with a second extrusion plate 225 , and the second extrusion plate 225 is located above the second airbag structure 25 ;

[0079] A second external thread 224 is disposed on the outer surface of the push sleeve 22 , and the second extrusion plate 225 is threadedly connected to the push sleeve 22 via the second external thread 224 .

[0080] It should be noted that the second airbag structure 25 is a structure in which the first airbag structure 23 is reduced in size according to a certain proportion. Except for the size, the other aspects are the same as the first airbag structure 23. A groove on the side of the mounting portion 21 is also provided on the placement piece 24 to facilitate the limitation of the side of the second airbag structure 25. The outer diameter of the placement piece 24 is smaller than the outer diameter of the mounting portion 21.

[0081] By setting up the second airbag structure 25, when the second positioning mechanism pushes the pushing sleeve 22, the first airbag structure 23 and the second airbag structure 25 distributed at different depths in the cone 40 can limit the different depths of the cone 40, thereby further improving the stability of the cone 40 during the positioning process.

[0082] A method for detecting the area of ​​coating peeling off on the surface of an aircraft engine cone, using an aircraft engine cone positioning device to position a cone 40 to be detected, comprising the following steps:

[0083] S1: adjusting the cone 40, controlling the cone 40 to rotate 90° at a time, dividing the cone 40 into four sides, and calculating the shedding area;

[0084] S2: The area recording method of the intersection of the four dividing lines. For the shedding area divided by the four intersection lines, the area of ​​the intersection on one side is recorded at a time, and the intersections recorded four times are all on the same side;

[0085] S3: Calculation of the shedding area: According to the shape of the shedding area on the surface of the cone 40, the irregular shedding area is calculated by using a calculation method similar to a circle or a triangle of an irregular shape.

[0086] It should be noted that, by setting the mounting portion 21 and the placement member 24, when the rubber member 211 limits the cone 40, the mounting portion 21 and the placement member 24 will not interfere with the positioning of the inner wall of the cone 40. At the same time, by reasonably setting the mounting portion 21 and the length of the sleeve 321, the first positioning mechanism and the second positioning mechanism can meet the detection of cones 40 of different depths. No matter how deep the cone 40 is, it should be noted that the diameter of the rubber member 211 is always smaller than the inner diameter of the large diameter end of the cone 40.

[0087] When the positioning column 32 is provided, the diameter of the positioning column 32 may be smaller than the diameter of the notch at the small diameter end of the cone 40;

[0088] During the whole process, the positioning column 32 and the sleeve 321 can ensure that after the entire cone 40 is positioned, the entire cone 40 remains vertical, which is convenient for subsequent measurement operations.

[0089] During operation, the large diameter end of the cone 40 is sleeved onto the first positioning mechanism, and as the end of the cone 40 with a smaller inner diameter gradually approaches the rubber member 211, the rubber member 211 gradually contacts the inner wall of the cone 40 until the outer wall of the rubber member 211 on the mounting portion 21 is completely in contact with the inner wall of the cone 40, thereby achieving the initial positioning of the cone 40 by the first positioning mechanism;

[0090] Next, under the action of the cylinder 31, the second positioning mechanism drives the second limiting body 30 to move the positioning column 32 toward the first limiting body 20, and the positioning column 32 gradually extends from the notch at the small diameter end of the cone 40 to the inside of the cone 40. In the process of the positioning column 32 gradually extending into the cone 40, the sleeve 321 on the positioning column 32 is gradually sleeved on the pushing sleeve 22 until it gradually contacts the second extrusion plate 225. When the second extrusion plate 225 is extruded, the second airbag structure 25 is extruded by the second extrusion plate 225.

[0091] When the second extrusion plate 225 is extruded, the push sleeve 22 slides along the outer surface of the limiting column 213, driving the first extrusion plate 221 to extrude the first airbag structure 23;

[0092] After the first airbag structure 23 and the second airbag structure 25 are squeezed, the relatively thin airbag layers of the first airbag structure 23 and the second airbag structure 25 close to the cone 40 swell and support the inner wall of the cone 40, thereby improving the multi-layer stability of the cone 40 during positioning.

[0093] Afterwards, the cone 40 is controlled to rotate 90° once, and the outer surface of the cone 40 is divided into four surfaces for inspection. During the inspection process, the above-mentioned inspection method is used to detect and calculate the peeling area of ​​the outer surface of the cone 40, and the calculated total area is compared with the standard area. When the peeling area exceeds the area specified by the standard, the outer surface of the cone 40 needs to be fully repaired for coating shedding.

[0094] It should be noted that the cone 40 positioned by the positioning device is a hollow cone.

[0095] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0096] 1. By setting a first positioning mechanism and a second positioning mechanism, the first positioning mechanism is used to perform preliminary positioning on the cone 40, and the second positioning mechanism is used to perform secondary positioning after the preliminary positioning, thereby solving the problem in the prior art that when positioning the cone 40 to be detected, the outer surface of the cone 40 is smooth and curved throughout, and during measurement, the positioning piece used for measurement and fixation cannot completely fit the cone 40. During measurement, the overall stability of the cone 40 is low, resulting in low accuracy in measuring the detached area of ​​the cone 40 surface.

[0097] 2. At the same time, when setting the first positioning mechanism and the second positioning mechanism, the components of the first positioning mechanism and the second positioning mechanism used to position the cone 40 are all located inside the cone 40, and will not contact the outer surface of the cone 40, and thus will not block the outer surface, thereby preventing the positioning components from contacting the outer surface of the cone 40 when the first positioning mechanism and the second positioning mechanism are positioning the cone 40, resulting in incomplete detection of the detached area of ​​the outer surface of the cone 40, resulting in errors in the detection results.

[0098] 3. By setting a mounting portion 21 on the first limiting body 20, and setting a first airbag structure 23 inside the mounting portion 21, and setting the first airbag structure 23 to be composed of a first airbag layer 231 and multiple second airbag layers 232, when positioning, the second airbag layer 232 on the first airbag structure 23 gradually fits with the inner wall of the cone 40, thereby strengthening the fit between the first positioning mechanism and the cone 40, and further improving the overall stability of the cone 40 after the cone 40 is positioned.

[0099] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0100] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An aircraft engine cone positioning device, used for positioning a cone (40) to be detected, comprising a support seat (10), characterized in that: The support seat (10) is provided with a first positioning mechanism and a second positioning mechanism, wherein the second positioning mechanism is located above the first positioning mechanism; the support seat (10) is also provided with a cylinder (31), wherein the cylinder (31) is used to control the second positioning mechanism to approach or move away from the first positioning mechanism; the first positioning mechanism is installed with the support seat (10) at a side close to the support seat (10), the first positioning mechanism comprises a first limiting body (20), a mounting portion (21) and a rubber member (211), the mounting portion (21) is installed at an end of the first limiting body (20) close to the second positioning mechanism and is rotatably connected to the first limiting body (20), the rubber member (211) is sleeved on an outer surface of the mounting portion (21) and is fixed to the mounting portion (21); the rubber member ( 211) is truncated cone-shaped; the diameter of the rubber member (211) is smaller than the diameter of the notch at the large diameter end of the cone (40), and the cone (40) is sleeved on the first positioning mechanism through the notch at the large diameter end of the cone (40); when the first positioning mechanism is positioned, the outer wall of the rubber member (211) abuts against the inner wall of the cone (40), and the rubber member (211) is used for preliminary positioning of the cone (40); the second positioning mechanism comprises a second limiting body (30) and a positioning column (32), and the side of the second limiting body (30) close to the support seat (10) is slidably connected to the support seat (10) through a slide groove under the action of the cylinder (31), and the positioning column (32) is installed on the side of the second limiting body (30) close to the first positioning mechanism, and is rotatably connected to the second limiting body (30); When the second positioning mechanism is positioned, the positioning column (32) enters the interior of the cone (40) through the notch at the small diameter end of the cone (40) under the action of the cylinder (31), and the positioning column (32) is used for the secondary limiting of the cone (40).

2. An aircraft engine cone positioning device according to claim 1, characterized in that: The mounting portion (21) is provided with a first storage groove (212) at one end close to the second limiting body (30), and a first airbag structure (23) is installed inside the first storage groove (212); the first airbag structure (23) comprises a first airbag layer (231) and a plurality of second airbag layers (232); the first airbag layer (231) and the plurality of second airbag layers (232) form a closed first airbag structure (23); the plurality of second airbag layers (232) are all connected to the first airbag layer (231), and the plurality of second airbag layers (232) are connected to the first airbag layer (231). ) is integrally formed with the first airbag layer (231); a plurality of the second airbag layers (232) are arranged around the first airbag layer (231); a plurality of slots corresponding to the second airbag layers (232) are opened on the mounting portion (21); each of the second airbag layers (232) passes through the corresponding slot and is limited by the mounting portion (21); an extrusion structure is installed at one end of the positioning column (32) close to the first limiting body (20); when positioning, the extrusion structure contacts the first airbag structure (23) and extrudes the first airbag structure (23).

3. An aircraft engine cone positioning device according to claim 2, characterized in that: A limiting column (213) is installed inside the mounting portion (21), and the limiting column (213) is located directly below the positioning column (32). A sleeve hole (233) matching the limiting column (213) is opened on the first airbag structure (23), and the first airbag structure (23) is sleeved on the limiting column (213) through the sleeve hole (233); a pushing sleeve (22) is sleeved on the limiting column (213), and the pushing sleeve (22) is slidably connected to the limiting column (213) through a return spring (223), and a first extrusion plate (221) is installed on the pushing sleeve (22); the outer diameter of the first extrusion plate (221) is larger than the diameter of the sleeve hole (233); the extrusion structure is a sleeve (321), and the inner diameter of the sleeve (321) is larger than the outer diameter of the pushing sleeve (22); when positioning, the sleeve (321) is sleeved on the outer surface of the pushing sleeve (22).

4. An aircraft engine cone positioning device as claimed in claim 3, characterized in that: A first external thread (222) is arranged on the outer surface of the push sleeve (22), and the first extrusion plate (221) is threadedly connected to the push sleeve (22) via the first external thread (222).

5. An aircraft engine cone positioning device as claimed in claim 4, characterized in that: The first airbag structure (23) comprises a first airbag layer (231), a plurality of second airbag layers (232), a third airbag layer (234) and a plurality of fourth airbag layers (235); the third airbag layer (234) is arranged at the center of the first airbag layer (231), and the thickness of the third airbag layer (234) is less than the thickness of the first airbag layer (231); each of the fourth airbag layers (235) is arranged at the center of a side of the corresponding second airbag layer (232) close to the inner side wall of the cone (40), and the thickness of the fourth airbag layer (235) is less than the thickness of the second airbag layer (232).

6. An aircraft engine cone positioning device as claimed in claim 5, characterized in that: A storage piece (24) is detachably connected to the first limiting body (20), the storage piece (24) is fixed to the mounting portion (21) via a connecting piece (241), and the outer diameter of the storage piece (24) is smaller than the outer diameter of the mounting portion (21); a second storage groove (242) is provided at one end of the storage piece (24) away from the mounting portion (21), and a second airbag structure (25) is installed inside the second storage groove (242); the storage piece (24) and the second airbag structure (25) are both sleeved on the pushing sleeve (22); a second extrusion plate (225) is installed on the pushing sleeve (22), and the second extrusion plate (225) is located above the second airbag structure (25); a second external thread (224) is arranged on the outer surface of the pushing sleeve (22), and the second extrusion plate (225) is threadedly connected to the pushing sleeve (22) via the second external thread (224).

7. An aircraft engine cone positioning device according to claim 2, characterized in that: The plurality of second airbag layers (232) are evenly distributed around the outer periphery of the first airbag layer (231).

8. The aircraft engine cone positioning device according to claim 1, characterized in that: A reduction motor (201) is installed inside the first limiting body (20), and an output end of the reduction motor (201) is fixedly connected to the mounting portion (21).

9. The aircraft engine cone positioning device according to claim 1, characterized in that: The outer surface of the positioning column (32) is sleeved with an elastic sleeve.

10. A method for detecting the surface coating peeling area of ​​an aircraft engine cone, using the aircraft engine cone positioning device according to any one of claims 1 to 9 for positioning, characterized in that: The following steps are involved: S1: adjusting the cone (40), controlling the cone (40) to rotate 90° at a time, dividing the cone (40) into four sides, and calculating the shedding area; S2: The area recording method of the intersection of the four dividing lines. For the shedding area divided by the four intersection lines, the area of ​​the intersection on one side is recorded at a time, and the intersections recorded four times are all on the same side; S3: Calculation of the shedding area: according to the shape of the shedding area on the surface of the cone (40), the irregular shedding area is calculated by using a calculation method similar to a circle or a triangle for an irregular shape.

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