Flexible holding device and holding method for flow channel plate of aircraft engine

Abstract

The present invention provides a flexible holding device and holding method for an aircraft engine flow channel plate, and relates to the technical field of aircraft engine flow channel plate processing, so as to solve the technical problem in the prior art that the lug of the aircraft engine flow channel plate is easy to vibrate during processing, resulting in the flatness and roughness of its end surface not meeting the requirements; a flexible holding device for an aircraft engine flow channel plate, comprising a tooling seat, a bracket, a gauge, a fixing component and a plurality of flexible holding components, the bracket is mounted on the tooling seat, the flexible holding component is slidably connected to the bracket, the flexible holding component comprises a support plate, a permanent magnet and iron powder, the iron powder is connected to the support plate and is adsorbed by the permanent magnet to form a plurality of arches located on the outer wall of the support plate, the gauge is movably connected to the bracket and is used to measure the surface to be processed of the lug of the flow channel plate, and the fixing component is used to fix the flexible holding component to the bracket; it also relates to a flexible holding method for an aircraft engine flow channel plate, which uses the above-mentioned flexible holding device for an aircraft engine flow channel plate.

Description

Technical Field

[0001] The invention relates to the technical field of aero-engine flow channel plate processing, and in particular to a flexible holding device and a holding method for an aero-engine flow channel plate. Background Art

[0002] The runner plate of an aircraft engine mainly includes a main body and a number of lugs arranged on the main body. The lugs are arranged roughly parallel to the length direction of the main body and are used to connect with other parts of the aircraft engine. In order to ensure the fit with other parts, the flatness and roughness of the lug end faces are required to be high, so the two opposite end faces of each lug need to be processed. Before processing the lugs of the runner plate, a number of protrusions will be reserved on the main body for fixing with the tooling seat, and then the tooling seat will be fixed in the machine tool to process the end faces of each lug in turn. Since the lugs of the runner plate are thin and long, vibrations are easily generated during the processing process, which affects the quality of the processed surface, resulting in the flatness and roughness of the lug end faces not meeting the requirements. Summary of the invention

[0003] In view of the shortcomings of the prior art, the first purpose of the present invention is to provide a flexible fixing device for an aircraft engine flow channel plate to solve the technical problem in the prior art that the lugs of the aircraft engine flow channel plate are prone to vibrate during the processing, resulting in the end surface flatness and roughness not meeting the requirements.

[0004] In order to solve the above technical problems, the present invention provides a flexible holding device for an aero-engine flow channel plate, comprising a tooling seat, a bracket, a gauge, a fixing assembly and a plurality of flexible holding assemblies, wherein the tooling seat is used to fix the flow channel plate, the bracket is mounted on the tooling seat, the plurality of flexible holding assemblies respectively correspond to the plurality of lug end faces of the flow channel plate one by one, the flexible holding assembly is detachably connected to the bracket and slidably connected to the bracket and the sliding direction is along the distribution direction of the plurality of lugs of the flow channel plate, the flexible holding assembly comprises a support plate, a permanent magnet and iron powder, the support plate is vertically arranged and connected with a permanent magnet, the iron powder is connected to the support plate and is adsorbed by the permanent magnet to form a plurality of arch bags located on the outer side wall of the support plate, the gauge is movably connected to the bracket and is used to measure the surface to be processed of the lug of the flow channel plate, the support plate is moved so that the arch bag is abutted against the surface to be supported of the lug of the flow channel plate, the surface to be processed and the surface to be supported correspond to the same lug, the fixing assembly is used to fix the flexible holding assembly to the bracket after the gauge reading changes during the movement of the support plate, and the gauge is a dial gauge or a micrometer.

[0005] After adopting the above structure, the flexible holding device of the aircraft engine flow channel plate in the present invention has the following advantages: the number of flexible holding components is the same as the total number of surfaces to be processed of all lugs, each group of flexible holding components corresponds to a surface to be supported, and each time a surface to be processed of a lug is processed, the flexible holding component corresponding to the surface to be supported opposite to the surface to be processed of the lug is selected and connected to the bracket. For example, when the left end face of the first lug is processed, the flexible holding component corresponding to the right end face of the first lug is connected to the bracket; after the flexible holding component is connected to the bracket, the probe of the gauge is first made to abut against the surface to be processed, and then the support plate is moved toward the direction of the surface to be supported and the arch bag is made to abut against the surface to be supported. During the movement, the arch bag is gradually moved under the reaction force of the surface to be supported. The lug is smoothed, thereby increasing the contact area between the iron powder and the surface to be supported. When the reading of the scale begins to change, it indicates that the support plate and the iron powder at this time have generated a supporting force on the lug that causes the lug to deform slightly. At this time, the support plate is stopped from moving, and the flexible holding component is fixed to the bracket by a fixing component, and the lug can be processed. During the processing, the support plate and the iron powder always maintain a supporting effect on the lug, thereby reducing the vibration of the lug during the processing, improving the processing quality of the lug end face, and making the flatness and roughness of the lug end face meet the requirements. In addition, the method of using a plurality of arch bags to jointly support the surface to be supported in the present invention can fit the surface to be supported as closely as possible when the surface to be supported has not been processed and is still in an uneven end face, thereby providing a stable supporting effect on the lug.

[0006] As an improvement, the flexible holding component also includes a first cover plate, which is detachably connected to the outer wall of the support plate, and a accommodating cavity is provided in the first cover plate. A plurality of through holes connected to the accommodating cavity are provided on the first cover plate, and the iron powder is arranged in the accommodating cavity and adsorbed by the permanent magnet, and the arch bag is exposed outside the through hole and is connected to the iron powder in the accommodating cavity through the through hole. With this structure, the accommodating cavity on the first cover plate can play a certain limiting role on the iron powder, and at the same time, the provision of the through holes ensures that a plurality of independent arch bags are formed outside the support plate, and the detachable connection between the first cover plate and the outer wall of the support plate facilitates the replenishment, recovery and sorting of the iron powder.

[0007] As an improvement, several arch bags are connected to each other through iron powder in the accommodating cavity. With this structure, the arch bags are connected to each other through the iron powder in the accommodating cavity, which improves the synergy and integrity between the arch bags and improves the supporting effect of the arch bags on the lugs.

[0008] As an improvement, the permanent magnet includes several permanent magnet sheets connected to the support plate, and the through holes correspond to the positions of the permanent magnet sheets one by one; with this structure, each arch package has an independent permanent magnet sheet to provide magnetic force, so that the overall strength of the arch package formed by each iron powder is higher, thereby improving the supporting effect on the lug.

[0009] As an improvement, a number of mounting holes are provided in the support plate, each of which is connected to a permanent magnet sheet, and the mounting hole is communicated with the accommodating cavity; with this structure, the permanent magnet sheet is arranged in the mounting hole and the mounting hole is communicated with the accommodating cavity, so that the magnetic force provided by the permanent magnet sheet to the iron powder is stronger, and the overall strength of the arch formed by each iron powder is further increased, thereby improving the supporting effect on the lug.

[0010] As an improvement, the flexible holding assembly also includes a second cover plate, which is detachably connected to the outer wall of the support plate and away from the first cover plate, and the mounting hole includes an expanded diameter portion and a reduced diameter portion, and the reduced diameter portion is located between the accommodating cavity and the expanded diameter portion. A step surface is provided between the expanded diameter portion and the reduced diameter portion, and the permanent magnet sheet is connected in the expanded diameter portion, and the fixing bolt is threadedly connected to the second cover plate and abuts against the permanent magnet sheet so that the permanent magnet sheet abuts against the step surface; adopting this structure, the connection structure between the permanent magnet sheet and the support plate is more stable.

[0011] As an improvement, a guide rail is connected to the bracket, and the flexible holding assembly also includes a movable plate connected to the support plate. The movable plate is detachably connected to a slider and is slidably connected to the guide rail through the slider. This structure makes the sliding of the support plate more stable and smooth.

[0012] As an improvement, reinforcing ribs are provided between the support plate and the movable plate; this structure improves the connection strength between the support plate and the movable plate, and at the same time the reinforcing ribs can also resist the reaction force of the lug on the support plate, thereby improving the supporting effect of the support plate and the iron powder on the lug.

[0013] As an improvement, the fixing assembly includes a connecting piece, a locking bolt and a locking nut. The bracket is provided with a limiting groove with a convex cross-section and arranged along the moving direction of the flexible retaining assembly. One end of the connecting piece is connected to the moving plate, and the locking bolt is slidably connected in the limiting groove and connected to the other end of the connecting piece through the locking nut. This structure has the advantages of simple structure and convenient connection.

[0014] A second object of the present invention is to provide a method for flexibly holding an aircraft engine flow channel plate, using the above-mentioned flexible holding device for an aircraft engine flow channel plate, further comprising the following steps:

[0015] S1, horizontally placing a support plate in a flexible holding assembly corresponding to the surface to be supported, placing iron powder on the support plate to form an arch;

[0016] S2, adjusting the support plate to a vertical state and slidingly connecting it to the bracket;

[0017] S3, connect the pointer of the gauge to the surface to be processed of the lug and adjust it to zero;

[0018] S4, moving the support plate so that the arch bag is against the surface to be supported. During the movement, the arch bag is flattened by the reaction force of the surface to be supported. Stop moving the support plate until the pointer of the gauge changes, and fix the flexible holding component with a fixing component;

[0019] S5. Remove the gauge and process the surface of the lug to be processed in the machine tool;

[0020] S6. Repeat steps S1-S5 until all the lug surfaces to be processed are processed.

[0021] After adopting the above method, the flexible holding method of the aircraft engine flow channel plate in the present invention has the following advantages: the number of flexible holding components is the same as the total number of the surfaces to be processed of all the lugs, each group of flexible holding components corresponds to a surface to be supported, and each time the surface to be processed of a lug is processed, the flexible holding component corresponding to the surface to be supported opposite to the surface to be processed of the lug is selected and connected to the bracket. For example, when the left end face of the first lug is processed, the flexible holding component corresponding to the right end face of the first lug is connected to the bracket; after the flexible holding component is connected to the bracket, the probe of the gauge is firstly made to abut against the surface to be processed, and then the support plate is moved toward the direction of the surface to be supported and the arch bag is made to abut against the surface to be supported. During the movement, the arch bag is gradually moved under the reaction force of the surface to be supported. The lug is smoothed, thereby increasing the contact area between the iron powder and the surface to be supported. When the reading of the scale begins to change, it indicates that the support plate and the iron powder at this time have generated a supporting force on the lug that causes the lug to deform slightly. At this time, the support plate is stopped from moving, and the flexible holding component is fixed to the bracket by a fixing component, and the lug can be processed. During the processing, the support plate and the iron powder always maintain a supporting effect on the lug, thereby reducing the vibration of the lug during the processing, improving the processing quality of the lug end face, and making the flatness and roughness of the lug end face meet the requirements. In addition, the method of using a plurality of arch bags to jointly support the surface to be supported in the present invention can fit the surface to be supported as closely as possible when the surface to be supported has not been processed and is still in an uneven end face, thereby providing a stable supporting effect on the lug. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0023] Figure 2 It is a cross-sectional view of the flexible holding component part of the present invention.

[0024] Figure 3 It is the front view of the present invention.

[0025] Figure 4 It is a side view of the present invention.

[0026] Figure 5 for Figure 4 A partial enlarged view of part A in the middle.

[0027] Figure 6 It is a schematic diagram of the structure of other flexible holding components in the present invention.

[0028] Figure numerals: 100, lug; 1, tooling seat; 2, bracket; 3, scale; 4, fixing assembly; 41, connecting piece; 42, locking bolt; 43, locking nut; 5, flexible holding assembly; 51, support plate; 52, permanent magnet; 521, permanent magnet sheet; 53, iron powder; 54, first cover plate; 55, second cover plate; 56, movable plate; 6, arch bag; 7, accommodating cavity; 8, through hole; 9, mounting hole; 91, diameter expansion part; 92, diameter reduction part; 93, step surface; 10, fixing bolt; 11, guide rail; 12, slider; 13, reinforcing rib; 14, limit groove. DETAILED DESCRIPTION

[0029] The flexible holding device and holding method for the flow channel plate of an aircraft engine of the present invention are described in detail below with reference to the accompanying drawings.

[0030] like Figures 1 to 6 As shown, a flexible holding device for a flow channel plate of an aircraft engine comprises a tooling seat 1, a bracket 2, a gauge 3, a fixing component 4 and a plurality of flexible holding components 5. The tooling seat 1 is used to fix the flow channel plate, and protrusions are reserved on both sides of the flow channel plate for connection and fixing with the tooling seat 1; the bracket 2 is mounted on the tooling seat 1, and the plurality of flexible holding components 5 correspond to the end faces of the plurality of lugs 100 of the flow channel plate one by one, respectively. The number of the flexible holding components 5 is the same as the total number of surfaces to be processed of all the lugs 100. Each lug 100 has two opposite end faces, one of which is used as a surface to be processed, and the other is a surface to be supported. Each group of flexible holding components 5 corresponds to a surface to be supported. Each time a surface to be processed of a lug 100 is processed, the flexible holding component 5 corresponding to the surface to be supported opposite to the surface to be processed of the lug 100 is selected and connected to the bracket 2. For example, when the left end face of the first lug 100 is processed, the flexible holding component 5 corresponding to the right end face of the first lug 100 is connected to the bracket 2.

[0031] like Figure 1 As shown, the flexible retaining component 5 is detachably connected to the bracket 2 and slidably connected to the bracket 2, and the sliding direction is along the distribution direction of the plurality of lugs 100 of the flow channel plate. It should be noted that the distribution direction of the plurality of lugs 100 is not necessarily strictly arranged in the left-right or front-back direction. They are arranged along the left-right direction as a whole, and there are also differences in the positions in the front-back direction. For example, in the present embodiment, the distribution direction of the three lugs 100 is roughly in the left-right direction, and the sliding direction of the flexible retaining component 5 is also in the left-right direction. The end faces of the lugs 100 that need to be processed are the left end face and the right end face.

[0032] like Figure 1As shown, the bracket 2 is connected with a guide rail 11. Specifically, the guide rail 11 is arranged at the top of the bracket 2 along the left-right direction. The flexible holding component 5 includes a support plate 51, a permanent magnet 52, iron powder 53 and a movable plate 56 connected to the support plate 51. The support plate 51 is vertically arranged and connected with the permanent magnet 52. The movable plate 56 is detachably connected with the slider 12 and is slidably connected to the guide rail 11 through the slider 12. There are two guide rails 11, front and rear. Correspondingly, a slider 12 is arranged on each guide rail 11. The front and rear ends of the movable plate 56 are detachably connected with the slider 12 by bolts. Figure 3 As shown, reinforcing ribs 13 are provided between the support plate 51 and the movable plate 56 .

[0033] like Figure 2 and Figure 3 As shown, the iron powder 53 is connected to the support plate 51 and is adsorbed by the permanent magnet 52 to form a plurality of arch bags 6 located on the outer wall of the support plate 51. The gauge 3 is movably connected to the bracket 2 and is used to measure the surface to be processed of the lug 100 of the flow channel plate, wherein the specific connection structure and connection method between the gauge 3 and the bracket 2 are both prior art and are not described in detail herein. The support plate 51 is moved so that the arch bag 6 is abutted against the surface to be supported of the lug 100 of the flow channel plate, and the surface to be processed and the surface to be supported correspond to the same lug 100. The fixing component 4 is used to fix the flexible holding component 5 to the bracket 2 after the reading of the gauge 3 changes during the movement of the support plate 51. The gauge 3 is a dial indicator or a micrometer.

[0034] like Figure 3 As shown, the three lugs 100 of the flow channel plate mounted on the tooling seat 1 have different heights. Figure 6 As shown, the main difference between the various flexible retaining components 5 is that the heights of the support plates 51 when they are vertically set are different, and the support plates 51 of different heights correspond to different lugs 100, and in order to adapt to the differences in the positions of the lugs 100 in the front-to-back direction, the positions of the arch bags 6 on the various support plates 51 are also different in the front-to-back direction.

[0035] like Figure 2 As shown, the flexible holding component 5 also includes a first cover plate 54, which is detachably connected to the outer wall of the support plate 51, and a accommodating cavity 7 is provided in the first cover plate 54. The first cover plate 54 is provided with a plurality of through holes 8 connected to the accommodating cavity 7, and the through holes 8 are provided on the left side wall of the first cover plate 54. The iron powder 53 is provided in the accommodating cavity 7 and is adsorbed by the permanent magnet 52, and the arch bag 6 is exposed outside the through holes 8 and is connected to the iron powder 53 in the accommodating cavity 7 through the through holes 8.

[0036] In some other embodiments, the arches 6 and the arches 6 can be independent of each other, and can also play a supporting and fixing role for the lug 100. In this embodiment, Figure 2As shown, several arch packages 6 are interconnected through the iron powder 53 in the accommodating cavity 7, so that each arch package 6 is formed as a whole by the iron powder 53 in the accommodating cavity 7, thereby increasing the synergy between the arch packages 6 and further improving the supporting and fixing effect on the lug 100.

[0037] like Figure 2 As shown, the permanent magnet 52 includes a plurality of permanent magnet pieces 521 connected to the support plate 51, and the through holes 8 correspond to the positions of the permanent magnet pieces 521 one by one, that is, each through hole 8 is coaxially arranged with a permanent magnet piece 521; a plurality of mounting holes 9 are provided in the support plate 51, and each mounting hole 9 is connected to a permanent magnet piece 521, and the mounting hole 9 is connected to the accommodating cavity 7, that is, each mounting hole 9 is coaxially arranged with one of the through holes 8.

[0038] like Figure 2 As shown, the flexible retaining assembly 5 also includes a second cover plate 55, and the second cover plate 55 is detachably connected to the outer wall of the support plate 51 and away from the first cover plate 54, that is, the right end face of the support plate 51 in this embodiment is connected to the second cover plate 55, the mounting hole 9 includes an enlarged diameter portion 91 and a reduced diameter portion 92, the reduced diameter portion 92 is located between the accommodating cavity 7 and the enlarged diameter portion 91, the reduced diameter portion 92 is connected to the accommodating cavity 7, the right end of the enlarged diameter portion 91 passes through the right end face of the support plate 51, a step surface 93 is provided between the enlarged diameter portion 91 and the reduced diameter portion 92, the permanent magnet piece 521 is connected in the enlarged diameter portion 91, the fixing bolt 10 is threadedly connected to the second cover plate 55 and abuts against the permanent magnet piece 521 so that the permanent magnet piece 521 abuts against the step surface 93.

[0039] like Figure 4 and Figure 5 As shown, the fixing assembly 4 includes a connecting member 41, a locking bolt 42 and a locking nut 43. The bracket 2 is provided with a limiting groove 14 which is arranged along the moving direction of the flexible retaining assembly 5 and has a convex cross-section. One end of the connecting member 41 is connected to the moving plate 56. The locking bolt 42 is slidably connected in the limiting groove 14 and is connected to the other end of the connecting member 41 through the locking nut 43. The front and rear ends of the moving plate 56 are connected to the bracket 2 through the fixing assembly 4.

[0040] The present invention also provides a method for flexibly holding an aero-engine flow channel plate, using the above-mentioned flexible holding device for the aero-engine flow channel plate, and further comprising the following steps:

[0041] S1, horizontally placing the support plate 51 in the flexible holding component 5 corresponding to the surface to be supported, placing iron powder 53 on the support plate 51 to form an arch bag 6;

[0042] S2, adjusting the support plate 51 to a vertical state and slidingly connecting it to the bracket 2;

[0043] S3, connect the pointer of the gauge 3 to the surface to be processed of the lug 100 and adjust it to zero;

[0044] S4, moving the support plate 51 so that the arch bag 6 is against the surface to be supported. During the movement, the arch bag 6 is flattened by the reaction force of the surface to be supported. Stop moving the support plate 51 until the pointer of the gauge 3 changes, and fix the flexible holding component 5 with the fixing component 4;

[0045] S5, remove the gauge 3 and process the surface to be processed of the lug 100 in the machine tool;

[0046] S6. Repeat steps S1-S5 until all the surfaces to be processed of the lugs 100 are processed.

[0047] Among them, when the iron powder 53 is placed on the support plate 51, the iron powder 53 is filled into each through hole 8. During the filling process, the iron powder 53 is adsorbed by the permanent magnet sheet 521 and naturally forms a conical arch bag 6 exposed outside the through hole 8; and after the processing of the lug 100 is completed, the conical arch bag 6 forms a plane, and in subsequent use, the iron powder 53 can be continued to be filled on this basis to re-form the arch bag 6, or the iron powder 53 can be refilled after cleaning the iron powder 53 in the accommodating cavity 7, so the iron powder 53 can also be reused.

[0048] After the flexible holding component 5 is connected to the bracket 2, the probe of the scale 3 is firstly made to abut against the surface to be processed, and then the support plate 51 is moved toward the surface to be supported and the arch bag 6 is made to abut against the surface to be supported. During the movement, the arch bag 6 is gradually smoothed under the reaction force of the surface to be supported, thereby increasing the contact area between the iron powder 53 and the surface to be supported. When the reading of the scale 3 begins to change, it means that the support plate 51 and the iron powder 53 at this time have generated a supporting force on the lug 100 that causes the lug 100 to deform slightly. At this time, the movement of the support plate 51 is stopped and the flexible holding component 5 and the bracket 2 are fixed by the fixing component 4, and the lug 100 can be processed; after the processing During the machining process, the support plate 51 and the iron powder 53 always maintain the supporting effect on the lug 100, thereby reducing the vibration of the lug 100 during the machining process, improving the machining quality of the end face of the lug 100, and making the flatness and roughness of the end face of the lug 100 meet the requirements; in addition, the method of using a plurality of arch bags 6 to jointly support the surface to be supported in the present invention can fit the surface to be supported as much as possible when the surface to be supported has not been machined and is still in an uneven end face, thereby providing a stable supporting effect for the lug 100; the reading change of the scale 3 is controlled within one grid, and the slight deformation of the lug 100 caused by the supporting force of the support plate 51 has a negligible effect on the machining of the end face of the lug 100.

[0049] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned one embodiment, and all other embodiments obtained by those skilled in the art without making any creative work are within the scope of protection of the present invention.

Claims

1. A flexible holding device for a flow channel plate of an aircraft engine, characterized in that: The invention comprises a tooling seat (1), a bracket (2), a gauge (3), a fixing component (4) and a plurality of flexible holding components (5), wherein the tooling seat (1) is used to fix a flow channel plate, the bracket (2) is mounted on the tooling seat (1), the plurality of flexible holding components (5) respectively correspond to the end surfaces of the plurality of lugs (100) of the flow channel plate, the flexible holding components (5) are detachably connected to the bracket (2) and slidably connected to the bracket (2) and the sliding direction is along the distribution direction of the plurality of lugs (100) of the flow channel plate, the flexible holding components (5) comprise a support plate (51), a permanent magnet (52) and iron powder (53), the support plate (51) is vertically arranged and connected to the permanent magnet (52), the iron powder (53) The powder (53) is connected to the support plate (51) and is adsorbed by the permanent magnet (52) to form a plurality of arches (6) located on the outer wall of the support plate (51). The gauge (3) is movably connected to the bracket (2) and is used to measure the surface to be processed of the lug (100) of the flow channel plate. The support plate (51) is moved so that the arches (6) are abutted against the surface to be supported of the lug (100) of the flow channel plate. The surface to be processed and the surface to be supported correspond to the same lug (100). The fixing component (4) is used to fix the flexible holding component (5) to the bracket (2) after the reading of the gauge (3) changes during the movement of the support plate (51). The gauge (3) is a dial gauge or a micrometer.

2. The flexible holding device for a flow channel plate of an aircraft engine according to claim 1, characterized in that: The flexible holding component (5) further comprises a first cover plate (54), the first cover plate (54) being detachably connected to the outer wall of the support plate (51), a receiving cavity (7) being provided in the first cover plate (54), a plurality of through holes (8) being provided on the first cover plate (54) being communicated with the receiving cavity (7), the iron powder (53) being arranged in the receiving cavity (7) and being adsorbed by the permanent magnet (52), the arch bag (6) being exposed outside the through hole (8) and being connected to the iron powder (53) in the receiving cavity (7) through the through hole (8).

3. The flexible holding device for the flow channel plate of an aircraft engine according to claim 2, characterized in that: A plurality of the arch bags (6) are connected to each other via the iron powder (53) in the accommodating cavity (7).

4. The flexible holding device for a flow channel plate of an aircraft engine according to claim 2, characterized in that: The permanent magnet (52) comprises a plurality of permanent magnet pieces (521) connected to the support plate (51), and the through holes (8) correspond to the positions of the permanent magnet pieces (521) one by one.

5. The flexible holding device for the flow channel plate of an aircraft engine according to claim 4, characterized in that: A plurality of mounting holes (9) are provided in the support plate (51), each of the mounting holes (9) is connected to one of the permanent magnet pieces (521), and the mounting holes (9) are in communication with the accommodating cavity (7).

6. The flexible holding device for a flow channel plate of an aircraft engine according to claim 5, characterized in that: The flexible retaining assembly (5) further comprises a second cover plate (55), the second cover plate (55) being detachably connected to the outer wall of the support plate (51) away from the first cover plate (54), the mounting hole (9) comprising an enlarged diameter portion (91) and a reduced diameter portion (92), the reduced diameter portion (92) being located between the accommodating cavity (7) and the enlarged diameter portion (91), a step surface (93) being provided between the enlarged diameter portion (91) and the reduced diameter portion (92), the permanent magnet sheet (521) being connected inside the enlarged diameter portion (91), the fixing bolt (10) being threadedly connected to the second cover plate (55) and abutting against the permanent magnet sheet (521) so that the permanent magnet sheet (521) abuts against the step surface (93).

7. The flexible holding device for a flow channel plate of an aircraft engine according to claim 1, characterized in that: The bracket (2) is connected to a guide rail (11), and the flexible retaining assembly (5) further comprises a movable plate (56) connected to the support plate (51), and the movable plate (56) is detachably connected to a slider (12) and is slidably connected to the guide rail (11) via the slider (12).

8. The flexible holding device for a flow channel plate of an aircraft engine according to claim 7, characterized in that: A reinforcing rib (13) is provided between the support plate (51) and the movable plate (56).

9. The flexible holding device for a flow channel plate of an aircraft engine according to claim 7, characterized in that: The fixing assembly (4) comprises a connecting member (41), a locking bolt (42) and a locking nut (43); the bracket (2) is provided with a limiting groove (14) which is arranged along the moving direction of the flexible holding assembly (5) and has a convex cross-section; one end of the connecting member (41) is connected to the moving plate (56); the locking bolt (42) is slidably connected in the limiting groove (14) and is connected to the other end of the connecting member (41) via the locking nut (43).

10. A flexible fixing method for an aircraft engine flow channel plate, characterized in that: The flexible holding device for the flow channel plate of an aircraft engine according to any one of claims 1 to 9 further comprises the following steps: S1, placing the support plate (51) in the flexible holding component (5) corresponding to the surface to be supported horizontally, placing the iron powder (53) on the support plate (51) and forming the arch bag (6); S2, adjusting the support plate (51) to a vertical state and slidingly connecting it to the bracket (2); S3, connecting the pointer of the gauge (3) to the surface to be processed of the lug (100) and adjusting it to zero; S4, moving the support plate (51) so that the arch bag (6) abuts against the surface to be supported, during the movement, the arch bag (6) is flattened by the reaction force of the surface to be supported, until the pointer of the gauge (3) changes, the support plate (51) is stopped from being moved, and the flexible holding component (5) is fixed by using the fixing component (4); S5, removing the gauge (3) and machining the surface to be machined of the lug (100) in a machine tool; S6. Repeat steps S1-S5 until all the surfaces to be processed of the lugs (100) are processed.

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