Method for adjusting rotating shaft of composite fairing

Abstract

The invention discloses a method for adjusting a rotating shaft of a composite fairing, and relates to the technical field of fairings, and the method comprises the following steps: S1, taking the vertex of the fairing as a rotating positioning reference, placing the fairing on a rotating tool, and positioning the fairing, so that the rotating axis of the fairing passes through the vertex of the fairing; s2, a marking pen is installed on a frame of the rotating tool; s3, the fairing is driven to rotate by taking the vertex of the fairing as a rotation reference point, and a connecting line of center points of bolt holes used for being connected with the mounting disc bolt is marked on the surface of the fairing through a marking pen; s4, the fairing is disassembled, the machining position of each bolt hole is determined on the connecting line of the center points of the bolt holes, and each bolt hole is machined; and S5, the mounting disc is fixedly assembled on the fairing through bolts and the bolt holes. The problem of vertex eccentricity after the composite fairing and the mounting disc are assembled can be conveniently and quickly solved, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of fairings, and in particular to a method for adjusting a rotating shaft of a composite material fairing. Background Art

[0002] Propeller flight fairings are mostly made of metal and are heavy. In order to reduce their flight weight, composite fairings are used instead. The original metal fairings are formed by spinning, which can effectively ensure that the apex of the fairing is not eccentric after processing. The fairing formed by composite materials is laid in a forming mold by the composite material, and is formed by vacuum heating and curing. This forming method requires subsequent processing of the bottom surface, and the bottom surface is used as a positioning to process the connection hole connected to the installation disk on the fairing. After the composite fairing is formed, the internal stress is released when processing the blade cuff 10, and the fairing is deformed. It is difficult to ensure the flatness of the bottom surface when connected to the installation disk, resulting in that after subsequent assembly with the installation disk, the overall rotation axis and the apex of the fairing are not on the same straight line, and the bottom surface of the fairing needs to be processed multiple times in the later stage to adjust the rotation axis, which reduces production efficiency.

[0003] In order to improve this situation, the present invention provides a method for adjusting the rotating axis of a composite fairing. Summary of the invention

[0004] The purpose of the present invention is to provide a method for adjusting the rotating axis of a composite fairing to solve the problems existing in the above-mentioned prior art, which can conveniently and quickly solve the problem of vertex eccentricity after the composite fairing is assembled with the mounting plate, thereby improving production efficiency.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a method for adjusting a rotating shaft of a composite fairing, comprising the following steps:

[0007] S1: placing the fairing on a rotating fixture and positioning the fairing with the apex of the fairing as a rotation positioning reference, so that the rotation axis of the fairing passes through the apex of the fairing;

[0008] S2: Installing a marking pen on the frame of the rotating tooling;

[0009] S3: driving the fairing to rotate with its vertex as a rotation reference point, and marking a line connecting the center points of the bolt holes for bolt connection with the mounting plate on the surface of the fairing with the marking pen;

[0010] S4: removing the fairing, determining the processing positions of the bolt holes on the line connecting the center points of the bolt holes, and processing the bolt holes;

[0011] S5: The mounting plate is fixedly assembled on the fairing through bolts and the bolt holes.

[0012] In one embodiment, the rotating tooling includes a frame and a positioning shaft, the positioning shaft includes an outer positioning shaft and an inner positioning shaft that are coaxial, the outer positioning shaft is connected to the bottom of the frame, the upper end of the outer positioning shaft is rotatably connected to a bearing seat, the inner positioning shaft is connected to the top of the frame, the lower end of the inner positioning shaft is rotatably connected to a clamping head, the inner positioning shaft is connected to a lifting and pressurizing mechanism, the lifting and pressurizing mechanism is used to drive the inner positioning shaft to lift and lower, the vertex of the fairing is placed on the bearing seat and is clamped by the clamping head.

[0013] In one embodiment, a top of the bearing seat is provided with a bearing curved surface matching with the top of the fairing.

[0014] In one embodiment, a hemispherical surface is provided at the bottom of the pressing head for pressing the fairing onto the bearing curved surface.

[0015] In one embodiment, an outer support is installed on the frame, a locating bearing is installed on the inner side of the outer support, the axis of the locating bearing is colinear with the axis of the locating shaft, the fairing is arranged in the locating bearing and abuts against the inner ring of the locating bearing, and the fairing is rotationally positioned by the locating bearing.

[0016] In one embodiment, the bearing seat is rotatably connected to the upper end of the outer positioning shaft via a first bearing, and the pressing head is rotatably connected to the lower end of the inner positioning shaft via a second bearing.

[0017] Compared with the prior art, the present invention has achieved the following technical effects:

[0018] The present invention provides an adjustment method for the rotation axis of a composite fairing. The fairing is placed on a rotating tool and positioned by taking the apex of the fairing as a rotation positioning reference, so that the rotation axis of the fairing passes through the apex of the fairing. During the self-rotation of the fairing, a line connecting the center points of bolt holes used for connecting with mounting plate bolts is marked on the surface of the fairing by a marking pen, and the processing position of each bolt hole is determined on the line connecting the center points of the bolt holes and the bolt holes are processed so that the center axis of the circle where each bolt hole is located passes through the apex of the fairing. Therefore, after the mounting plate is fixedly assembled on the fairing by bolts and bolt holes, the apex of the fairing is located on the rotation axis of the mounting plate and the overall structure of the fairing, which conveniently and quickly solves the problem of vertex eccentricity after the fairing and the mounting plate are assembled, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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 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.

[0020] Figure 1 It is a schematic diagram of a composite fairing installed on a rotating fixture in an embodiment of the present invention.

[0021] In the figure: 1- fairing, 2- rotating tool, 3- frame, 4- marking pen, 5- positioning shaft, 51- outer positioning shaft, 52- inner positioning shaft, 53- bearing seat, 54- clamping head, 55- first bearing, 56- second bearing, 6- outer support, 7- positioning bearing, 8- line connecting the center points of the bolt holes, 9- processing position of the bolt holes, 10- cuff. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0023] The purpose of the present invention is to provide a method for adjusting the rotating shaft of a composite fairing to solve the problems existing in the prior art, which can conveniently and quickly solve the problem of vertex eccentricity after the composite fairing is assembled with a mounting plate, thereby improving production efficiency.

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] like Figure 1 As shown, this embodiment provides a method for adjusting the rotation axis of a composite fairing, comprising the following steps:

[0026] S1: placing the fairing 1 on the rotating fixture 2 and positioning it with the vertex of the fairing 1 as the rotation positioning reference, so that the rotation axis of the fairing 1 passes through the vertex of the fairing 1;

[0027] S2: Install a marking pen 4 on the frame 3 of the rotating tooling 2;

[0028] S3: driving the fairing 1 to rotate with its vertex as the rotation reference point, and marking a line 8 of the center points of the bolt holes for bolt connection with the mounting plate on the surface of the fairing 1 by a marking pen 4;

[0029] S4: Remove the fairing 1, determine the processing positions 9 of the bolt holes on the line 8 connecting the center points of the bolt holes, and process the bolt holes;

[0030] S5: The mounting plate is fixedly assembled on the fairing 1 through bolts and the bolt holes.

[0031] The rotary tool 2 includes a frame 3 and a positioning shaft 5. The positioning shaft 5 includes a coaxial outer positioning shaft 51 and an inner positioning shaft 52. The outer positioning shaft 51 is connected to the bottom of the frame 3. The upper end of the outer positioning shaft 51 is rotatably connected to a bearing seat 53. The inner positioning shaft 52 is connected to the top of the frame 3. The lower end of the inner positioning shaft 52 is rotatably connected to a clamping head 54. The inner positioning shaft 52 is connected to a lifting and pressing mechanism. The lifting and pressing mechanism is used to drive the inner positioning shaft 52 to rise and fall. The top of the fairing 1 is placed on the bearing seat 53 and is clamped by the clamping head 54. The top of the bearing seat 53 is provided with a bearing curved surface that matches the top of the fairing 1. The bottom of the clamping head 54 is provided with a hemispherical surface for clamping the fairing 1 on the bearing curved surface. The bearing seat 53 is rotatably connected to the upper end of the outer positioning shaft 51 through a first bearing 55, and the clamping head 54 is rotatably connected to the lower end of the inner positioning shaft 52 through a second bearing 56.

[0032] An outer support member 6 is installed on the frame 3, and a locating bearing 7 is installed on the inner side of the outer support member 6. The axis of the locating bearing 7 is colinear with the axis of the locating shaft 5. The fairing 1 is arranged in the locating bearing 7 and is against the inner ring of the locating bearing 7. The fairing 1 is rotationally positioned by the locating bearing 7 so that when the fairing 1 rotates, its rotation axis passes through its vertex.

[0033] Among them, the upper part of the frame 3 (connected to the inner positioning shaft 52) ​​and the lower part (connected to the outer positioning shaft 51 and the outer support member 6) are detachably connected. When installing the fairing 1, first place the fairing 1 in the positioning bearing 7, and support the apex of the fairing 1 on the bearing surface at the top of the bearing seat 53. At this time, the fairing 1 is positioned under the action of the bearing seat 53 and the positioning bearing 7, and the rotation axis of the fairing 1 passes through its apex. Then, the upper part of the frame 3 is installed on the lower part of the frame 3 together with the inner positioning shaft 52 and the lifting and pressing mechanism to ensure the coaxiality of the inner positioning shaft 52 and the outer positioning shaft 51. Then, the inner positioning shaft 52 is driven down by the lifting and pressing mechanism, and the apex of the fairing 1 is pressed against the bearing seat 53 by the clamping head 54. Then, the fairing 1 can be rotated, and the surface of the fairing 1 is marked with a marking pen 4 to obtain a connecting line 8 of the center points of the bolt holes. Afterwards, the fairing 1 is removed, and the processing positions 9 of the bolt holes are respectively determined on the line 8 connecting the center points of the bolt holes, and the bolt holes are processed.

[0034] The present invention uses the apex of the fairing as a rotation positioning reference to place the fairing on a rotating tooling and perform position positioning, so that the rotation axis of the fairing passes through the apex of the fairing. During the rotation of the fairing, a line connecting the center points of bolt holes used for connecting with mounting plate bolts is marked on the surface of the fairing by a marking pen, and the processing position of each bolt hole is determined on the line connecting the center points of the bolt holes and the bolt holes are processed, so that the center axis of the circle where each bolt hole is located passes through the apex of the fairing. Therefore, after the mounting plate is fixedly assembled on the fairing by bolts and bolt holes, the apex of the fairing is located on the rotation axis of the mounting plate and the overall structure of the fairing, which conveniently and quickly solves the eccentricity problem after the fairing and the mounting plate are assembled, thereby improving production efficiency.

[0035] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A method for adjusting the rotating shaft of a composite fairing, characterized in that: The following steps are involved: S1: placing the fairing on a rotating fixture and positioning the fairing with the apex of the fairing as a rotation positioning reference, so that the rotation axis of the fairing passes through the apex of the fairing; S2: Installing a marking pen on the frame of the rotating tooling; S3: driving the fairing to rotate with its vertex as a rotation reference point, and marking a line connecting the center points of the bolt holes for bolt connection with the mounting plate on the surface of the fairing with the marking pen; S4: removing the fairing, determining the processing positions of the bolt holes on the line connecting the center points of the bolt holes, and processing the bolt holes; S5: The mounting plate is fixedly assembled on the fairing through bolts and the bolt holes.

2. The method for adjusting the rotation axis of a composite fairing according to claim 1, characterized in that: The rotating tooling includes a frame and a positioning shaft, the positioning shaft includes an outer positioning shaft and an inner positioning shaft of a coaxial line, the outer positioning shaft is connected to the bottom of the frame, the upper end of the outer positioning shaft is rotatably connected to a bearing seat, the inner positioning shaft is connected to the top of the frame, the lower end of the inner positioning shaft is rotatably connected to a clamping head, the inner positioning shaft is connected to a lifting and pressurizing mechanism, the lifting and pressurizing mechanism is used to drive the inner positioning shaft to lift and lower, the vertex of the fairing is placed on the bearing seat and is clamped by the clamping head.

3. The method for adjusting the rotation axis of a composite fairing according to claim 2, characterized in that: The top of the bearing seat is provided with a bearing curved surface matched with the top of the fairing.

4. The method for adjusting the rotation axis of a composite fairing according to claim 3, characterized in that: The bottom of the pressing head is provided with a hemispherical surface for pressing the fairing onto the bearing curved surface.

5. The method for adjusting the rotation axis of a composite fairing according to claim 2, characterized in that: An outer support is installed on the frame, and a locating bearing is installed on the inner side of the outer support. The axis of the locating bearing is colinear with the axis of the locating shaft. The fairing is arranged in the locating bearing and abuts against the inner ring of the locating bearing. The fairing is rotationally positioned by the locating bearing.

6. The method for adjusting the rotation axis of a composite fairing according to claim 5, characterized in that: The bearing seat is rotatably connected to the upper end of the outer positioning shaft through a first bearing, and the pressing head is rotatably connected to the lower end of the inner positioning shaft through a second bearing.

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