A composite material rotating body internal and external double centering fixture

Abstract

The present invention discloses an internal and external double centering fixture for a composite material rotating body, which relates to the field of fixtures and includes an inner mounting seat, an outer mounting seat, a driving mechanism, at least three centering mechanisms, and at least three supporting and telescopic mechanisms. The outer mounting seat is rotatably sleeved on the outside of the inner mounting seat, and multiple supporting and telescopic mechanisms are sequentially arranged on the outside of the outer mounting seat along the circumferential direction. The centering mechanism includes a rocker arm and a first sleeve. Multiple first sleeves of multiple centering mechanisms are hinged to the inner mounting seat in sequence along the circumferential direction. One end of multiple rockers of multiple centering mechanisms is hinged to the outer mounting seat in sequence along the circumferential direction, and the other end of each rocker arm is slidably sleeved in a first sleeve and can extend into a through hole. The driving mechanism is arranged on the outer mounting seat and is used to drive the inner mounting seat to rotate relative to the outer mounting seat. The composite material rotating body internal and external double centering fixture can quickly perform double centering on the internal and external structures and can ensure the assembly coaxiality of the newly added rotating body and the main rotating body.

Description

Technical Field

[0001] The invention relates to the field of clamps, in particular to an internal and external double-centering clamp of a composite material rotating body. Background Art

[0002] The solid rocket motor case is responsible for bearing the rocket's axial load, protecting the fuel compartment from axial pressure damage during storage and operation, thereby ensuring the missile's structural stability. Because the molding process of this composite rotating body requires the addition of different coaxial structures, repeated disassembly, assembly, and centering are required during the molding process. Therefore, certain requirements are placed on the coaxiality of the various structures and ease of assembly and disassembly during the molding process.

[0003] Currently, there is no fixture specifically designed for the molding process of composite rotors. Currently, traditional machine tool fixtures, such as triangular chucks, are used in production processes. These can only be clamped on the outer wall of a shaft or supported on the inner wall of a rotor, making it difficult to ensure the coaxial assembly of the additional rotor with the main rotor. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides an internal and external double centering fixture for a composite material rotating body, which can quickly double center the internal and external structures and ensure the assembly coaxiality of the newly added rotating body and the main rotating body.

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

[0006] The present invention provides an inner and outer double centering fixture of a composite material rotating body, comprising an inner mounting seat, an outer mounting seat, a driving mechanism, at least three centering mechanisms and at least three supporting and telescopic mechanisms, the outer mounting seat being rotatably sleeved on the outside of the inner mounting seat, and a plurality of the supporting and telescopic mechanisms being sequentially arranged on the outside of the outer mounting seat along the circumferential direction; a through hole is provided in the middle of the inner mounting seat, the centering mechanism comprising a rocker arm and a first sleeve, a plurality of the first sleeves of a plurality of the centering mechanisms being hinged to the inner mounting seat in sequence along the circumferential direction, one end of a plurality of the rocker arms of a plurality of the centering mechanisms being hinged to the outer mounting seat in sequence along the circumferential direction, and the other end of each of the rocker arms being slidably sleeved in one of the first sleeves and being able to extend into the through hole; the driving mechanism being arranged on the outer mounting seat, and being used for driving the inner mounting seat to rotate relative to the outer mounting seat.

[0007] Preferably, the supporting telescopic mechanism includes a second sleeve, a linear telescopic drive component and a telescopic arm, one end of the second sleeve is fixed to the outside of the outer mounting seat, the telescopic arm is slidably sleeved inside the other end of the second sleeve, and the linear telescopic drive component is arranged in the second sleeve and is used to drive the telescopic arm to move relative to the second sleeve.

[0008] Preferably, the supporting telescopic mechanism further comprises an outer roller, which is rotatably mounted on one end of the telescopic arm away from the outer mounting seat, and the axial direction of the outer roller is consistent with the axial direction of the outer mounting seat.

[0009] Preferably, the linear telescopic drive component is a hydraulic cylinder, the cylinder body of the hydraulic cylinder is fixed in the second sleeve, and the piston rod of the hydraulic cylinder is fixedly connected to the telescopic arm.

[0010] Preferably, the supporting telescopic mechanism also includes connecting bolts and connecting nuts, strip holes are provided on both sides of the second sleeve, and a receiving groove is provided at one end of the telescopic arm close to the outer mounting seat, and the piston rod of the hydraulic cylinder extends into the receiving groove, and the connecting bolt passes through one of the strip holes, one side of the telescopic arm, the piston rod of the hydraulic cylinder, the other side of the telescopic arm and another strip hole in sequence and is installed with the connecting nut.

[0011] Preferably, the centering mechanism further comprises an inner roller, which is rotatably mounted on one end of the rocker arm extending into the through hole, and the axial direction of the inner roller is consistent with the axial direction of the inner mounting seat.

[0012] Preferably, the driving mechanism includes a first mounting block, a second mounting block and a lead screw, an extension plate is provided on the outside of the inner mounting seat, the second mounting block is hinged to the extension plate, a threaded hole is provided on the second mounting block, the first mounting block is hinged to the outer mounting seat, one end of the lead screw is rotatably mounted on the first mounting block, and the other end of the lead screw is mounted in the threaded hole and extends to the outside of the second mounting block.

[0013] Preferably, the inner mounting seat includes a first cylinder, a second cylinder and an annular base plate which are coaxially arranged from top to bottom, the extension plate is arranged on one side of the outside of the first cylinder, the outer diameters of the first cylinder and the annular base plate are both larger than the outer diameter of the second cylinder, the outer mounting seat is rotatably sleeved on the outside of the second cylinder, and the annular base plate is fixed to the second cylinder by a plurality of fixing bolts; a plurality of mounting holes are sequentially arranged on the first cylinder along the circumferential direction, the mounting holes pass through both sides of the first cylinder, each of the first sleeves is located in one of the mounting holes and is hinged to the first cylinder.

[0014] Preferably, the plurality of supporting telescopic mechanisms are evenly arranged in sequence along the circumferential direction on the outside of the outer mounting seat, the plurality of the first sleeves of the plurality of the centering mechanisms are evenly hinged to the inner mounting seat in sequence along the circumferential direction, and one ends of the plurality of the rocker arms of the plurality of the centering mechanisms are evenly hinged to the outer mounting seat in sequence along the circumferential direction.

[0015] Preferably, the number of the supporting and retracting mechanisms and the number of the centering mechanisms are both three.

[0016] Compared with the prior art, the present invention has achieved the following technical effects:

[0017] The composite material rotating body inner and outer double centering fixture of the present invention includes an inner mounting seat, an outer mounting seat, a driving mechanism, at least three centering mechanisms and at least three supporting telescopic mechanisms. When in use, the inner mounting seat is sleeved on the central axis of the main rotating body, and the driving mechanism drives the inner mounting seat to rotate relative to the outer mounting seat. Due to the restriction of the first sleeve, the rocker arm swings and the inner end can move toward the central axis. The central axis is quickly clamped and centered by multiple centering mechanisms, and multiple supporting telescopic mechanisms are synchronously extended until they contact the inner wall of the newly added rotating body, thereby being able to quickly perform double centering on the internal and external structures, ensuring that the central axis of the newly added rotating body and the main rotating body are collinearly arranged, thereby ensuring the assembly coaxiality of the newly added rotating body and the main rotating body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. 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 any creative work.

[0019] Figure 1 This is a schematic structural diagram of the internal and external double centering fixture for a composite material rotating body provided by the present invention;

[0020] Figure 2 A bottom view of the inner and outer double centering fixture of the composite material rotating body provided by the present invention;

[0021] Figure 3 This is a right side view of the internal and external double centering fixture of the composite material rotating body provided by the present invention;

[0022] Figure 4 A cross-sectional view of the internal and external double-centering fixture of the composite material rotating body provided by the present invention;

[0023] Figure 5 This is a structural schematic diagram of the first mounting block in the composite material rotating body internal and external double centering fixture provided by the present invention;

[0024] Figure 6 This is a schematic diagram of the use of the internal and external double centering fixture for the composite material rotating body provided by the present invention.

[0025] Explanation of the reference numerals: 100, inner and outer double centering fixture for composite rotating body; 1, outer mounting seat; 2, inner mounting seat; 201, first cylinder; 202, second cylinder; 203, annular base plate; 204, fixing bolt; 205, mounting hole; 3, rocker arm; 4, washer; 5, first step screw; 6, first sleeve; 7, second step screw; 8, inner roller; 9, extension plate; 10, first mounting block; 11, second mounting block; 12, U-shaped groove; 13, lead screw; 14, limit plate; 15, connecting plate; 16, second sleeve; 17, strip hole; 18, telescopic arm; 19, connecting bolt; 20, connecting nut; 21, outer roller; 22, first stud; 23, first fixing nut; 200, main rotating body; 300, center axis; 400, new rotating body. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0027] The purpose of the present invention is to provide an internal and external double centering fixture for a composite material rotating body, which can quickly perform double centering on the internal and external structures and ensure the assembly coaxiality of the newly added rotating body and the main rotating body.

[0028] 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.

[0029] like Figures 1-6As shown, this embodiment provides an internal and external double centering fixture 100 for a composite material rotating body, comprising an inner mounting seat 2, an outer mounting seat 1, a driving mechanism, at least three centering mechanisms and at least three supporting and telescopic mechanisms. The outer mounting seat 1 is rotatably sleeved on the outside of the inner mounting seat 2, and a plurality of supporting and telescopic mechanisms are sequentially arranged on the outside of the outer mounting seat 1 along the circumferential direction. The plurality of supporting and telescopic mechanisms are used to quickly center the external structure and to adaptively adjust the external structures with different inner diameters. The external structure in this embodiment is a newly added rotating body 400. A through-hole is provided in the middle of the inner mounting seat 2. The centering mechanism includes a rocker arm 3 and a first sleeve 6. The multiple first sleeves 6 of the multiple centering mechanisms are hingedly connected to the inner mounting seat 2 in sequence along the circumferential direction. One end of the multiple rocker arms 3 of the multiple centering mechanisms is hingedly connected to the outer mounting seat 1 in sequence along the circumferential direction. The other end of each rocker arm 3 is slidably sleeved in a first sleeve 6 and can extend into the through-hole. The multiple centering mechanisms are used to quickly center the internal structure and adaptively adjust internal structures with different outer diameters. In this embodiment, the internal structure is the central axis 300 of the main rotating body 200. The drive mechanism is provided on the outer mounting seat 1 and is used to drive the inner mounting seat 2 to rotate relative to the outer mounting seat 1.

[0030] When in use, the inner mounting seat 2 is sleeved on the central axis 300 of the main rotating body 200, and the driving mechanism drives the inner mounting seat 2 to rotate relative to the outer mounting seat 1. Due to the restriction of the first sleeve 6, the rocker arm 3 swings and the inner end can move toward the central axis 300. The central axis 300 is quickly clamped and centered by multiple centering mechanisms, and multiple supporting telescopic mechanisms are synchronously extended until they contact the inner wall of the newly added rotating body 400, thereby being able to quickly double-center the internal and external structures, ensuring that the newly added rotating body 400 and the central axis 300 of the main rotating body 200 are collinearly arranged, thereby ensuring the assembly coaxiality of the newly added rotating body 400 and the main rotating body 200, and is suitable for the assembly process of composite rotating bodies of various sizes.

[0031] Specifically, the supporting telescopic mechanism includes a second sleeve 16, a linear telescopic drive component and a telescopic arm 18. One end of the second sleeve 16 is fixed to the outside of the outer mounting seat 1, and the telescopic arm 18 is slidably sleeved inside the other end of the second sleeve 16. The linear telescopic drive component is arranged in the second sleeve 16 and is used to drive the telescopic arm 18 to move relative to the second sleeve 16.

[0032] In order to facilitate the installation of the second sleeve 16 , a connecting plate 15 is provided at one end of the second sleeve 16 close to the outer mounting seat 1 , and the connecting plate 15 is fixed on the outer mounting seat 1 .

[0033] The telescopic support mechanism in this embodiment also includes an outer roller 21, which is rotatably mounted on the end of the telescopic arm 18 that is distal from the outer mounting base 1. The axis of the outer roller 21 aligns with the axis of the outer mounting base 1. The outer roller 21 enables the telescopic arm 18 to rotate when extended by the linear telescopic drive component and contacts the inner wall of the newly added rotating member, thereby facilitating adjustment of the assembly position of the newly added rotating member and achieving precise assembly.

[0034] The supporting telescopic mechanism also includes a first stud 22 and two first fixing nuts 23. A first mounting groove is provided at the end of the telescopic arm 18 away from the outer mounting seat 1, and the outer roller 21 is located in the first mounting groove. The first stud 22 passes through one side of the telescopic arm 18, the outer roller 21 and the other side of the telescopic arm 18 in sequence. A first fixing nut 23 is installed at both ends of the first stud 22 to enable the outer roller 21 to be rotatably installed on the telescopic arm 18.

[0035] The linear telescopic drive component in this embodiment is a hydraulic cylinder, the cylinder body of the hydraulic cylinder is fixed in the second sleeve 16 , and the piston rod of the hydraulic cylinder is fixedly connected to the telescopic arm 18 .

[0036] Specifically, the supporting telescopic mechanism also includes a connecting bolt 19 and a connecting nut 20. Strip holes 17 are provided on both sides of the second sleeve 16. A receiving groove is provided at one end of the telescopic arm 18 close to the outer mounting seat 1. The piston rod of the hydraulic cylinder extends into the receiving groove. The connecting bolt 19 passes through a strip hole 17, one side of the telescopic arm 18, the piston rod of the hydraulic cylinder, the other side of the telescopic arm 18 and another strip hole 17 in sequence and is installed with a connecting nut 20, thereby fixing the telescopic arm 18 to the piston rod of the hydraulic cylinder.

[0037] The centering mechanism in this embodiment further includes an inner roller 8, which is rotatably mounted on the end of the rocker arm 3 that extends into the through hole. The axis of the inner roller 8 is aligned with the axis of the inner mounting seat 2. The inner roller 8 allows the entire structure to rotate on the central axis 300, facilitating orientation adjustment during assembly and simplifying the assembly process.

[0038] The centering mechanism also includes a second stud and two second fixing nuts. A second mounting groove is provided at the inner end of the rocker arm 3, and the inner roller 8 is located in the second mounting groove. The second stud passes through one side of the rocker arm 3, the inner roller 8 and the other side of the rocker arm 3 in sequence. A second fixing nut is installed at both ends of the second stud to enable the inner roller 8 to be rotatably installed on the rocker arm 3.

[0039] Specifically, the driving mechanism includes a first mounting block 10, a second mounting block 11 and a screw 13. An extension plate 9 is provided on the outside of the inner mounting seat 2. The second mounting block 11 is hinged to the extension plate 9. A threaded hole is provided on the second mounting block 11. The first mounting block 10 is hinged to the outer mounting seat 1. One end of the screw 13 is rotatably mounted on the first mounting block 10, and the other end of the screw 13 is installed in the threaded hole and extends to the outside of the second mounting block 11.

[0040] like Figure 5 As shown, a U-shaped groove 12 is provided on the side of the first mounting block 10 away from the outer mounting seat 1, and the screw 13 is rotatably installed in the U-shaped groove 12. Two limit plates 14 are provided at one end of the screw 13, and the two limit plates 14 are respectively located on both sides of the U-shaped groove 12, so that the screw 13 can rotate in place relative to the first mounting block 10.

[0041] By rotating the screw 13 to drive the second mounting block 11 to move, the inner mounting seat 2 is rotated relative to the outer mounting seat 1. Due to the restriction of the first sleeve 6, the rocker arm 3 swings and the inner end can move toward or away from the center axis 300, which can achieve precise clamping diameter adjustment. At the same time, the screw structure can make the second mounting block 11 produce a self-locking effect, preventing the rocker arm 3 from shaking after clamping and losing its fixing ability.

[0042] In this specific embodiment, the first mounting block 10 is hinged to the outer mounting base 1 by means of third-step screws, and the second mounting block 11 is hinged to the extension plate 9 by means of fourth-step screws.

[0043] Specifically, the inner mounting seat 2 includes a first cylinder 201, a second cylinder 202 and an annular base plate 203 coaxially arranged from top to bottom, and the extension plate 9 is arranged on one side of the outside of the first cylinder 201. The outer diameters of the first cylinder 201 and the annular base plate 203 are both larger than the outer diameter of the second cylinder 202. The outer mounting seat 1 is rotatably sleeved on the outside of the second cylinder 202, and the annular base plate 203 is fixed to the second cylinder 202 by multiple fixing bolts 204. The first cylinder 201 and the annular base plate 203 are used to limit the axial movement of the outer mounting seat 1; a plurality of mounting holes 205 are sequentially arranged on the first cylinder 201 along the circumferential direction, and the mounting holes 205 pass through both sides of the first cylinder 201. Each first sleeve 6 is located in a mounting hole 205 and is hinged to the first cylinder 201.

[0044] In this embodiment, the center holes of the first cylinder 201 , the second cylinder 202 and the annular bottom plate 203 are sequentially connected to form a through hole, and the inner diameters of the first cylinder 201 , the second cylinder 202 and the annular bottom plate 203 are all the same.

[0045] Specifically, the outer mounting seat 1 is a circular ring structure, and the inner wall of the outer mounting seat 1 fits in contact with the outer wall of the second cylinder 202. The outer diameter of the outer mounting seat 1 is greater than the outer diameter of the first cylinder 201.

[0046] In this specific embodiment, one end of the rocker arm 3 is hinged to the outer mounting base 1 through a first step screw 5, a washer 4 is provided between one end of the rocker arm 3 and the outer mounting base 1, and the washer 4 is sleeved on the first step screw 5; the first sleeve 6 is hinged to the first cylinder 201 through a second step screw 7.

[0047] The multiple supporting telescopic mechanisms in this embodiment are evenly arranged on the outside of the outer mounting seat 1 along the circumferential direction, the multiple first sleeves 6 of the multiple centering mechanisms are evenly hinged to the inner mounting seat 2 along the circumferential direction, and one ends of the multiple rocker arms 3 of the multiple centering mechanisms are evenly hinged to the outer mounting seat 1 along the circumferential direction.

[0048] In this specific embodiment, three supporting and retracting mechanisms and three centering mechanisms are provided.

[0049] The specific usage process is as follows: Figure 6 As shown, the two ends of the central axis 300 of the main rotor 200 are clamped, and in this process, the inner mounting seat 2 is mounted on the central axis 300, and the newly added rotor 400 is mounted on the outside of the composite rotor inner and outer double centering fixture 100. The screw 13 is turned, and through the cooperation between the screw 13 and the second mounting block 11, the inner mounting seat 2 is driven to rotate relative to the outer mounting seat 1. Under the limiting action of the first sleeve 6, the rocker arm 3 swings relative to the outer mounting seat 1, causing the inner end of the rocker arm 3 to move toward the central axis 300, thereby achieving clamping and centering. The linear telescopic drive component drives the telescopic arm 18 outward, causing the outer roller 21 to contact the inner wall of the newly added rotor 400, thereby supporting and centering the newly added rotor 400, thereby making the newly added rotor 400 highly coaxial with the main rotor 200.

[0050] In this embodiment, multiple centering mechanisms can quickly center and clamp central shafts 300 of different diameters by driving the rocking arm 3 through the rotation of the inner mounting seat 2. The support radius can be quickly adjusted according to the inner diameter of the newly added rotating body 400 through the support telescopic mechanism, and the newly added rotating body 400 can be concentric with the main rotating body 200, thereby achieving assembly standardization in the composite material rotating body forming process, improving the coaxiality and assembly accuracy of the new and old rotating body structures, and solving the problem that the main rotating body 200 needs to be assembled repeatedly during the composite material rotating body forming process, thereby failing to well ensure the coaxiality of the new and old rotating body structures.

[0051] This specification uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A composite material rotating body double centering fixture, characterized in that: The cam is a member of a group of members which are connected to the outer frame of the cam and are pivotally connected to each other with respect to the support frame, and the cam is a member of a group of members which are connected to the outer frame of the cam. The movable sleeve is arranged in one of the first sleeves and can extend into the through hole; the driving mechanism is arranged on the outer mounting seat and is used to drive the inner mounting seat to rotate relative to the outer mounting seat; the supporting telescopic mechanism includes a second sleeve, a linear telescopic driving component and a telescopic arm, one end of the second sleeve is fixed to the outside of the outer mounting seat, and the telescopic arm is slidably sleeved inside the other end of the second sleeve, the linear telescopic driving component is arranged in the second sleeve, and is used to drive the telescopic arm to move relative to the second sleeve, and multiple supporting telescopic mechanisms are driven synchronously.

2. The composite material rotating body inner and outer double centering fixture according to claim 1, characterized in that: The supporting telescopic mechanism further comprises an outer roller, which is rotatably mounted on one end of the telescopic arm away from the outer mounting seat, and the axial direction of the outer roller is consistent with the axial direction of the outer mounting seat.

3. The composite material rotating body inner and outer double centering fixture according to claim 1, characterized in that: The linear telescopic driving component is a hydraulic cylinder, the cylinder body of the hydraulic cylinder is fixed in the second sleeve, and the piston rod of the hydraulic cylinder is fixedly connected to the telescopic arm.

4. The composite material rotating body inner and outer double centering fixture according to claim 3, characterized in that: The supporting telescopic mechanism also includes connecting bolts and connecting nuts. Strip holes are provided on both sides of the second sleeve. A receiving groove is provided at one end of the telescopic arm close to the outer mounting seat. The piston rod of the hydraulic cylinder extends into the receiving groove. The connecting bolt passes through one of the strip holes, one side of the telescopic arm, the piston rod of the hydraulic cylinder, the other side of the telescopic arm and another strip hole in sequence and is installed with the connecting nut.

5. The composite material rotating body inner and outer double centering fixture according to claim 1, characterized in that: The centering mechanism further includes an inner roller, which is rotatably mounted on one end of the rocker arm extending into the through hole, and the axial direction of the inner roller is consistent with the axial direction of the inner mounting seat.

6. The composite material rotating body inner and outer double centering fixture according to claim 1, characterized in that: The driving mechanism includes a first mounting block, a second mounting block and a lead screw. An extension plate is provided on the outside of the inner mounting seat. The second mounting block is hinged to the extension plate. A threaded hole is provided on the second mounting block. The first mounting block is hinged to the outer mounting seat. One end of the lead screw is rotatably mounted on the first mounting block, and the other end of the lead screw is mounted in the threaded hole and extends to the outside of the second mounting block.

7. The composite material rotating body inner and outer double centering fixture according to claim 6, characterized in that: The inner mounting seat includes a first cylinder, a second cylinder and an annular base plate which are coaxially arranged from top to bottom. The extension plate is arranged on one side of the outside of the first cylinder. The outer diameters of the first cylinder and the annular base plate are both larger than the outer diameter of the second cylinder. The outer mounting seat is rotatably sleeved on the outside of the second cylinder. The annular base plate is fixed to the second cylinder by a plurality of fixing bolts. A plurality of mounting holes are sequentially arranged on the first cylinder along the circumferential direction. The mounting holes pass through both sides of the first cylinder. Each of the first sleeves is located in one of the mounting holes and is hinged to the first cylinder.

8. The composite material rotating body inner and outer double centering fixture according to claim 1, characterized in that: The plurality of supporting and telescopic mechanisms are evenly arranged in sequence along the circumferential direction on the outside of the outer mounting seat, the plurality of the first sleeves of the plurality of the centering mechanisms are evenly hinged to the inner mounting seat in sequence along the circumferential direction, and one ends of the plurality of the rocker arms of the plurality of the centering mechanisms are evenly hinged to the outer mounting seat in sequence along the circumferential direction.

9. The composite material rotating body inner and outer double centering fixture according to claim 1, characterized in that: The supporting and retracting mechanisms and the centering mechanisms are both provided in three numbers.

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