Composite material center cone turning and milling shared fixture and turning and milling processing method

Abstract

The present application relates to a kind of composite center cone milling shared fixture, including base, coaxial connection shaft is provided on the one end surface of base;Coaxial positioning boss for positioning center cone is provided on the other end surface of base, positioning boss is adapted to set in the large end inner diameter of center cone, first compacting device for compacting the wall surface of small end of center cone is provided on positioning boss;The mounting bracket of positioning boss is also coaxially provided by connecting strut, second compacting device for fixing the large end surface of center cone is installed on the mounting bracket;It further includes pressure sensor and the control device for receiving pressure sensor signal and controlling the clamping force of first compacting device and second compacting device, and milling processing method for clamping composite center cone is also provided.The present application realizes one-time clamping in turning and milling process, and provides internal support effect when turning and milling, guarantees the surface processing quality of center cone in processing process.

Description

Technical Field

[0001] This invention relates to the field of machining center cones of composite materials. Background Technology

[0002] The center cone of an aero-engine is located at the rear of the turbine combustion chamber and must withstand the scouring of exhaust gases exceeding 800°C during operation. Current aero-engines primarily utilize high-temperature alloys. However, future aero-engine turbine inlet temperatures will continue to rise, reaching 1200°C or higher, making it difficult for traditional high-temperature alloys to withstand such high temperatures. Because carbon / carbon composites and ceramic matrix composites exhibit significantly superior high-temperature performance compared to traditional high-temperature alloys, future aero-engines will extensively utilize these materials for high-temperature components such as the center cone. Currently, research and development of carbon / carbon composite and ceramic matrix composite center cones has commenced in China. The wall thickness of the center cone is typically less than 2mm. As a pre-formed blank, the composite center cone requires appropriate clamping to ensure stability during machining. However, both carbon / carbon composites and ceramic matrix composites are hard and brittle composites, and the thin-walled structure of the center cone necessitates avoiding excessive clamping force that could cause breakage. Machining the composite center cone requires both turning and milling operations; designing separate clamps for each would inevitably increase labor intensity and manufacturing costs. Therefore, to reduce manufacturing costs and labor intensity while improving production efficiency, this patent proposes a fixture that combines turning the outer shape and milling the groove. After precision turning the outer shape, milling can be performed directly, which also helps control machining defects such as burrs on the end face waist-shaped groove. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a universal fixture and milling method for turning and milling center cones of carbon / carbon composite materials and ceramic matrix composite materials, which can realize universal clamping and complete the turning and milling of center cones of the two composite materials.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a composite material center cone milling and turning fixture, including a base, and a connecting shaft for mounting and fixing with different machine tool worktables is provided on one end face of the base;

[0005] The other end face of the base is provided with a positioning boss for positioning the central cone. The positioning boss is adapted to the inner diameter of the small end of the central cone. A first pressing device is provided on the positioning boss for pressing the inner wall surface of the small end of the central cone.

[0006] The positioning boss is also provided with a mounting bracket via a connecting support rod, and a second clamping device for fixing the large end face of the central cone is mounted on the mounting bracket;

[0007] The base, connecting shaft, positioning boss, and mounting bracket are coaxially arranged.

[0008] It also includes a pressure sensor and a control device for receiving pressure sensor signals and controlling the clamping force of the first and second clamping devices.

[0009] Furthermore, the first pressing device includes a pneumatic lifting rod disposed at the center of the positioning boss and moving up and down along the central cone axis;

[0010] At least two pairs of sliding grooves are provided on the positioning boss surrounding the pneumatic lifting rod. A pressing block is provided in the sliding groove. The pressing block is connected to the lifting and lowering moving end of the pneumatic lifting rod through a drive connecting rod. The pneumatic lifting rod is used to drive the drive connecting rod to push the pressing block to press against the inner wall of the small end of the central cone.

[0011] A first pressure sensor is provided on the inner wall of the small end of the pressing block facing the central cone, for sensing the pressing force of the pressing block on the inner wall of the small end.

[0012] Furthermore, the connecting rods provided on the positioning boss include at least two rods, and the connecting rods are spaced apart from the slide groove on the positioning boss.

[0013] Furthermore, two pairs of sliding grooves are provided on the positioning boss, and the two pairs of sliding grooves are evenly arranged in the circumferential direction of the mounting surface of the positioning boss, and are distributed in a cross shape; a first connecting ear is provided on the clamping block, and a second connecting ear is provided at the lifting and lowering moving end of the pneumatic lifting rod, and the first connecting ear and the second connecting ear are movably connected by a drive linkage.

[0014] Furthermore, the second clamping device includes a support plate coaxially mounted on the mounting frame, and a cylinder is provided at the center of the mounting frame, with the cylinder rod passing through the center hole of the support plate.

[0015] The support plate is provided with a disc-shaped support plate composed of at least two fan-shaped panels. At least two limiting blocks are evenly provided around the surface of the disc-shaped support plate. One end of at least four clamping rods corresponding to the limiting blocks is in contact with the cylinder rod, and the other end of the clamping rods is movably supported on the limiting blocks.

[0016] The cylinder drives the cylinder rod to rise and fall along the central cone axis. The clamping rod uses the limit block as a fulcrum. One end of the clamping rod is lifted by the cylinder rod, and the other end of the clamping rod presses against the large end face of the central cone.

[0017] A second pressure sensor is provided on the disc-shaped support plate to sense the clamping force of the clamping rod on the large end face of the central cone.

[0018] Furthermore, the disc-shaped support plate is composed of four fan-shaped panels, and all four fan-shaped panels are fixed to the support plate by bolts.

[0019] The four panel panels are respectively the first support plate, the second support plate, the third support plate, and the fourth support plate, and are assembled and spliced ​​into a disc-shaped support plate according to the order of the support plate names; wherein, the second support plate and the third support plate are symmetrically arranged, the central angle of the two panel panels is 90°-108°, the central angle of the first support plate is 90°, and the central angle of the fourth support plate is 54°-90°.

[0020] The diameter of the assembled disc-shaped support plate is matched with the inner diameter of the large end side of the central cone, and the support of the large end side of the central cone is gradually completed through the assembly of the support plates.

[0021] Furthermore, the second pressure sensor is disposed on each panel of the disc-shaped support plate; each panel is fixedly connected to the support plate by bolts.

[0022] Furthermore, the clamping rod is an L-shaped rod, with one end of the clamping rod aligned with the axial direction of the central cone; the other end of the clamping rod extends along the circumference of the disc-shaped support plate, is evenly distributed along the circumference of the disc-shaped support plate, and is movably supported on the limiting block.

[0023] Furthermore, the pressure sensor includes a first pressure sensor for sensing the pressing force of the first pressing device on the inner wall of the small end of the central cone and a second pressure sensor for sensing the pressing force of the second pressing device on the large end of the central cone.

[0024] When the pressure value of the first pressure sensor reaches the clamping value, the clamping movement of the first clamping device stops and the holding pressure is locked to ensure clamping of the small end of the center cone during turning and milling. When the pressure value of the second pressure sensor reaches the clamping value, the clamping movement of the second clamping device stops and the holding pressure is locked to ensure clamping of the large end of the center cone during turning and milling.

[0025] The present invention also provides a milling and turning method for clamping a composite material center cone with the aforementioned fixture, which involves mounting the center cone milling and turning fixture with the center cone fixed on it on a lathe worktable via the aforementioned connecting shaft to perform milling and turning of the center cone shape;

[0026] After turning, the machine is mounted on the milling machine table via a connecting shaft to perform milling grooves on the outer end of the center cone.

[0027] The beneficial effects of this invention are:

[0028] 1. Through the positioning components on the four slide rails and the six clamping devices, under the monitoring of the pressure sensor, the pneumatic lifting platform is controlled to achieve automatic centering of the central cone and automatic clamping of the end of the central cone.

[0029] 2. Through the supporting and fixing functions of the base, positioning components, support rods, support plates, and fixing components, internal support is provided during turning and milling to ensure the surface machining quality of the center cone during the machining process.

[0030] 3. After clamping, perform the external turning of the part first, and then perform the milling. This avoids changing fixtures between turning and milling, which can improve processing efficiency. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of the present invention;

[0032] Figure 2 This is a schematic diagram of the positioning component in this invention;

[0033] Figure 3 A schematic diagram of the central cone being clamped in the device of the present invention.

[0034] In the diagram: 1-Connecting shaft, 201-Base, 202-Positioning boss, 203-Slide groove, 3-First clamping device, 301-Clamping block, 302-First pressure sensor, 303-First connecting ear, 304-Pneumatic lifting rod, 305-Second connecting ear, 306-Drive connecting rod, 307-Second bolt, 308-Third bolt, 4-Connecting support rod, 5-Second clamping device, 501-Cylinder, 502-Support plate, 503-Second pressure sensor, 504-Clamping rod, 505-Limiting block, 506-Cylindrical pin, 507-Second support plate, 508-Fourth support plate, 509-Cylinder pull rod, 510-Third support plate, 511-First support plate, 512-Bolt, 6-Mounting bracket, 7-Control device, 8-Central cone, 9-Large end face of central cone. Detailed Implementation

[0035] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0036] To achieve the above objectives, the present invention provides the following specific embodiments:

[0037] Example 1: As Figure 1-3 As shown, a composite material center cone milling and turning common fixture includes a base 201, and a connecting shaft 1 for mounting and fixing with different machine tool worktables is provided on one end face of the base 201;

[0038] The other end face of the base 201 is provided with a positioning boss 202 for positioning the central cone. The positioning boss 202 is adapted to the inner diameter of the small end of the central cone 8. A first pressing device 3 for pressing the inner wall surface of the small end of the central cone 8 is provided on the positioning boss 202.

[0039] The first pressing device 3 includes a pneumatic lifting rod 304, which is located at the center of the positioning boss 202 and moves up and down along the central cone axis.

[0040] At least two pairs of sliding grooves 203 are provided on the positioning boss 202 surrounding the pneumatic lifting rod 304. A pressing block 301 is provided in the sliding groove 203. The pressing block 301 is connected to the lifting and lowering moving end of the pneumatic lifting rod 304 through the driving connecting rod 306. The pneumatic lifting rod 304 is used to drive the driving connecting rod 306 to push the pressing block 301 to press the inner wall of the small end of the central cone.

[0041] A first pressure sensor 302 is provided on the inner wall of the small end of the clamping block 301 facing the central cone 8, for sensing the clamping force of the clamping block 301 on the inner wall of the small end. The connecting support rod 4 provided on the positioning boss 202 includes at least two rods, and the connecting support rod 4 and the slide groove 203 are spaced apart on the positioning boss 202.

[0042] Two pairs of sliding grooves 203 are provided on the positioning boss 202, and the two pairs of sliding grooves 203 are evenly arranged in the circumferential direction of the mounting surface of the positioning boss 202, and are distributed in a cross shape; a first connecting ear 303 is provided on the clamping block 301, and a second connecting ear 305 is provided at the lifting and lowering moving end of the pneumatic lifting rod 304. The first connecting ear 303 and the second connecting ear 305 are movably connected by the driving connecting rod 306.

[0043] The positioning boss 202 is also provided with a mounting bracket 6 via a connecting support rod 4, and the second clamping device 5 for fixing the large end face 9 of the center cone is mounted on the mounting bracket 6;

[0044] The second pressing device 5 includes a support plate 502 coaxially mounted on the mounting frame 6, and a cylinder 501 is provided at the center of the mounting frame 6. The cylinder rod 509 of the cylinder 501 passes through the center hole of the support plate 502.

[0045] A disc-shaped support plate consisting of four fan-shaped panels is provided on the support plate 502. At least two limiting blocks 505 are evenly provided around the disc-shaped support plate. One end of at least four pressing rods 504 corresponding to the limiting blocks 505 is in contact with the cylinder rod 509, and the other end of the pressing rods 504 is movably supported on the limiting blocks 505.

[0046] All four fan panels are fixed to the support plate 502 by bolts 512;

[0047] The four panel panels are designated as first support plate 511, second support plate 507, third support plate 510, and fourth support plate 508, and are assembled into a disc-shaped support plate according to the order of the support plate names; among them, the second support plate 507 and the third support plate 510 are symmetrically arranged, with the center angle of the two panel panels being 90°-108°, the center angle of the first support plate 511 being 90°, and the center angle of the fourth support plate 508 being 54°-90°;

[0048] The diameter of the assembled disc-shaped support plate is matched with the inner diameter of the large end side of the central cone, and the support of the large end side of the central cone is gradually completed through the assembly of the support plates.

[0049] Cylinder 501 drives cylinder rod 509 to rise and fall along the central cone axis. The clamping rod 504 uses the limiting block 505 as a fulcrum. One end of the clamping rod 504 is lifted by the cylinder rod 509, while the other end of the clamping rod 504 presses against the large end face 9 of the central cone. The clamping rod 504 is an L-shaped rod. The direction of one end of the clamping rod 504 is consistent with the central cone axis. The other end of the clamping rod 504 extends along the circumference of the disc-shaped support plate and is evenly distributed around the circumference of the disc-shaped support plate, and is movably supported on the limiting block 505.

[0050] A second pressure sensor 503 is provided on the disc-shaped support plate to sense the pressing force of the clamping rod 504 on the large end face 9 of the central cone. The second pressure sensor 503 is provided on each sector panel of the disc-shaped support plate; each sector panel is fixedly connected to the support plate 502 by bolts 512.

[0051] The base 201, connecting shaft 1, positioning boss 202 and mounting bracket 6 are coaxially arranged;

[0052] It also includes a pressure sensor and a control device 7 for receiving the pressure sensor signal and controlling the clamping force of the first clamping device 3 and the second clamping device 5.

[0053] The pressure sensors include a first pressure sensor 302 for sensing the pressing force of the first pressing device 3 on the inner wall of the small end of the central cone 8 and a second pressure sensor 503 for sensing the pressing force of the second pressing device 5 on the large end face 9 of the central cone.

[0054] When the pressure value of the first pressure sensor 302 reaches the clamping value, the clamping movement of the first clamping device 3 stops and the pressure is locked to ensure clamping of the small end of the center cone during turning and milling. When the pressure value of the second pressure sensor 503 reaches the clamping value, the clamping movement of the second clamping device 5 stops and the pressure is locked to ensure clamping of the large end of the center cone during turning and milling.

[0055] To further illustrate the present invention, the following is a more detailed description of the present invention:

[0056] The present invention provides a design scheme for a composite material center cone milling and turning fixture, including a base 201, a connecting shaft 1 at one end of the base 201, a precision positioning component at the other end of the base 201, and four connecting rods 4 evenly distributed in a circle. The ends of the four connecting rods 4 are provided with mounting brackets 6, which are disc-shaped and parallel to the base 201. Fixing components are installed on the mounting brackets 6.

[0057] The base 201 has a positioning boss 202 for coarse positioning of the central cone. The positioning boss 202 has a sliding groove 203, and a clamping block 301 is provided on the sliding groove 203. The clamping block 301 is connected to one end of the drive rod 306 through a third bolt 308 and a first connecting ear 303. The other end of the drive rod 306 is connected to the pneumatic lifting rod 304 through a second bolt 307 and a second connecting ear 305. When the pneumatic lifting rod 304 moves downward, the clamping block 301 can be moved along the sliding groove 203 to the outside of the positioning boss 202 by the drive rod 306. A first pressure sensor 302 is provided on the clamping block 301. When the pressure reaches a set value, the pneumatic lifting rod 304 stops descending and maintains the pressure to perform fine positioning of the central cone.

[0058] The positioning boss 202 has four cross-shaped sliding grooves 203, and the positioning components in each groove are the same, which together complete the automatic centering of the central cone.

[0059] The mounting bracket 6 can be fitted with a first support plate 511, a second support plate 507, a third support plate 510, and a fourth support plate 508 via bolts 512. When assembled in a specific order, they form a disc shape. The second support plate 507 and the fourth support plate 508 are symmetrical and have the largest volume, followed by the first support plate 511, and then the third support plate 510. The diameter of the disc formed by the first support plate 511, the second support plate 507, the third support plate 510, and the fourth support plate 508 matches the inner diameter of the central cone end, thus supporting the end of the central cone.

[0060] The pallet assembly is provided with a limiting block 505, which is connected to the clamping rod 504 via a cylindrical pin 506. The clamping rod 504 can rotate around the cylindrical pin 506. One end of the clamping rod 504 can press the end of the central cone, and the other end is in contact with the cylinder rod 509. The cylinder rod 509 is connected to the cylinder 501. The cylinder 501 is fixed to the support plate 502, and the support plate 502 is fixed to the step surface of the support rod. By controlling the cylinder 501 to raise the cylinder rod 509, the end of the clamping rod 504 in contact with the cylinder rod 509 is raised, and the other end of the clamping rod 504 can press the end of the central cone. The pallet assembly is equipped with a second pressure sensor 503. When the control cylinder 501 raises the cylinder rod 509 to lift one end of the clamping rod 504, the clamping rod 504 rotates around the cylindrical pin 506. The other end of the clamping rod 504 will press against the end of the central cone. The end of the central cone presses against the second pressure sensor 503. When the pressure value of the second pressure sensor 503 reaches the set value, the control cylinder 501 stops moving and maintains the pressure to press and fix the end of the central cone.

[0061] The combination of clamping rod 504, limiting block 505, and cylindrical pin 506 consists of six parts, which are circumferentially distributed on the disc-shaped structure formed by the first support plate 511, the second support plate 507, the third support plate 510, and the fourth support plate 508, and can jointly fix the end of the central cone in six directions.

[0062] The base 201 has a connecting shaft 1 on one side, which can be installed and fixed on different machine tool worktables.

[0063] The implementation of this device includes the following steps:

[0064] Step 1: Place the central cone on the base 201 and perform initial centering using the positioning boss 202;

[0065] Step 2: Control the pneumatic lifting rod 304 to descend via the control device 7. The pneumatic lifting rod 304 drives the pressing block 301 to press against the inner wall of the central cone via the drive link 306. When the first pressure sensor 302 senses that the pressure has reached the set value, it controls the pneumatic lifting rod 304 to stop descending and maintain the pressure.

[0066] Step 3: The first support plate 511, the second support plate 507, the third support plate 510, and the fourth support plate 508 are installed on the support plate 502 by bolts 512 to achieve uniform support of the support plates;

[0067] Step 4: Install the six sets of clamping rods 504 onto the limiting block 505 on the pallet assembly via cylindrical pins 506;

[0068] Step 5: Control the cylinder 501 to move the cylinder rod 509 through the control device 7. The cylinder rod 509 lifts one end of the clamping rod 504, causing the clamping rod 504 to rotate around the cylindrical pin 506. The other end of the clamping rod 504 will press against the end of the central cone. The end of the central cone presses against the second pressure sensor 503. When the pressure value of the second pressure sensor 503 reaches the set value, control the cylinder 501 to stop moving and maintain the pressure.

[0069] Step 6: Clamp the workpiece onto the lathe worktable via connecting shaft 1 and perform normal turning machining;

[0070] Step 7: After completing the turning process, simply remove the connecting shaft 1 from the lathe worktable to remove it as a whole. Then, install the connecting shaft 1 on the milling machine worktable and perform milling.

[0071] Step 8: After the end milling of the thin-walled part is completed, remove the device of the present invention, and then disassemble it in reverse order by reversing steps 5, 4, 3 and 2, and remove the central cone.

[0072] This step includes all the steps of turning and milling the composite material center cone using the present invention. If only the outer shape needs to be turned or only the end milling needs to be performed, the above steps can be selectively performed.

[0073] Example 2: The present invention also provides a milling and turning method for clamping a composite material center cone with a fixture, which is to install a common fixture for milling and turning a center cone with a fixed center cone on a lathe worktable through a connecting shaft 1 to turn the shape of the center cone;

[0074] After turning, the machine is mounted on the milling machine table via connecting shaft 1 to perform milling grooves on the outer end of the center cone.

[0075] The composite material center cone turning and milling shared fixture provided by the present invention allows the composite material center cone to be turned first after one clamping and then milled, avoiding the need to change fixtures between turning and milling, thus improving processing efficiency.

[0076] The center cone is internally clamped and fixed to the base 201 using a composite material center cone milling and turning fixture. The base 201 is connected to the lathe worktable via a zero-point positioning device connecting plate, which serves as the connecting shaft 1, for turning the center cone's shape. During the turning process, the composite material center cone milling and turning fixture supports the center cone, ensuring the machining quality of the center cone.

[0077] The center cone is internally clamped and fixed to the base 201 using a composite material center cone milling and turning fixture. The base 201 is mounted on the milling machine table via a connecting shaft 1 for milling grooves at the outer end of the center cone. During the milling process, the composite material center cone milling and turning fixture supports the center cone, ensuring the machining quality of the center cone.

[0078] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A combined turning and milling fixture for composite material center cones, characterized in that, Includes a base (201), and a connecting shaft (1) for mounting and fixing with different machine tool worktables is provided on one end face of the base (201); The other end face of the base (201) is provided with a positioning boss (202) for positioning the central cone. The positioning boss (202) is adapted to the inner diameter of the small end of the central cone (8). A first pressing device (3) for pressing the inner wall of the small end of the central cone (8) is provided on the positioning boss (202). The positioning boss (202) is also provided with a mounting bracket (6) via a connecting support rod (4), and a second clamping device (5) for fixing the large end face (9) of the center cone is mounted on the mounting bracket (6); The base (201), connecting shaft (1), positioning boss (202) and mounting bracket (6) are coaxially arranged; It also includes a pressure sensor and a control device (7) for receiving pressure sensor signals and controlling the clamping force of the first clamping device (3) and the second clamping device (5). The first pressing device (3) includes a pneumatic lifting rod (304) located at the center of the positioning boss (202) and moving up and down along the central cone axis. At least two pairs of sliding grooves (203) are provided on the positioning boss (202) surrounding the pneumatic lifting rod (304). A pressing block (301) is provided in the sliding groove (203). The pressing block (301) is connected to the lifting and lowering moving end of the pneumatic lifting rod (304) through the driving link (306). The pneumatic lifting rod (304) is used to drive the driving link (306) to push the pressing block (301) to press the inner wall of the small end of the central cone (8). A first pressure sensor (302) is provided on the inner wall of the small end of the pressing block (301) facing the central cone (8) to sense the pressing force of the pressing block (301) on the inner wall of the small end; Two pairs of sliding grooves (203) are provided on the positioning boss (202), and the two pairs of sliding grooves (203) are evenly arranged in the circumferential direction of the mounting surface of the positioning boss (202) in a cross-shaped distribution; a first connecting ear (303) is provided on the clamping block (301), and a second connecting ear (305) is provided at the lifting and lowering moving end of the pneumatic lifting rod (304). The first connecting ear (303) and the second connecting ear (305) are movably connected by a driving connecting rod (306). The second pressing device (5) includes a support plate (502) coaxially mounted on the mounting frame (6), and a cylinder (501) is provided at the center of the mounting frame (6). The cylinder rod (509) of the cylinder (501) passes through the center hole of the support plate (502). The support plate (502) is provided with a disc-shaped support plate composed of at least two fan-shaped panels. At least two limiting blocks (505) are evenly provided around the disc-shaped support plate. One end of at least four pressing rods (504) corresponding to the limiting blocks (505) is in contact with the cylinder rod (509), and the other end of the pressing rods (504) is movably supported on the limiting blocks (505). The cylinder (501) drives the cylinder rod (509) to rise and fall along the central cone axis. The clamping rod (504) uses the limit block (505) as a fulcrum. One end of the clamping rod (504) is lifted by the cylinder rod (509), and the other end of the clamping rod (504) presses against the large end face (9) of the central cone. A second pressure sensor (503) is provided on the disc-shaped support plate to sense the pressing force of the clamping rod (504) on the large end face (9) of the central cone; The pressure sensors include a first pressure sensor (302) for sensing the pressing force of the first pressing device (3) on the inner wall of the small end of the central cone (8) and a second pressure sensor (503) for sensing the pressing force of the second pressing device (5) on the large end face (9) of the central cone. When the pressure value of the first pressure sensor (302) reaches the clamping value, the clamping movement of the first clamping device (3) is stopped, and the pressure is locked to ensure clamping of the small end of the center cone during turning and milling. When the pressure value of the second pressure sensor (503) reaches the clamping value, the clamping movement of the second clamping device (5) is stopped, and the pressure is locked to ensure clamping of the large end of the center cone during turning and milling.

2. The composite material center cone milling and turning fixture as described in claim 1, characterized in that, The connecting rods (4) provided on the positioning boss (202) include at least two rods, and the connecting rods (4) and the slide groove (203) are spaced apart on the positioning boss (202).

3. The composite material center cone milling and turning fixture as described in claim 1, characterized in that, The disc-shaped support plate is composed of four fan-shaped panels, and all four fan-shaped panels are fixed to the support plate (502) by bolts (512); The four panel panels are the first support plate (511), the second support plate (507), the third support plate (510), and the fourth support plate (508), and are assembled into a disc-shaped support plate according to the order of the support plate names; wherein, the second support plate (507) and the third support plate (510) are symmetrically arranged, the center angle of the two panel panels is 90°-108°, the center angle of the first support plate (511) is 90°, and the center angle of the fourth support plate (508) is 54°-90°; The diameter of the assembled disc-shaped support plate is matched with the inner diameter of the large end side of the central cone, and the support of the large end side of the central cone is gradually completed through the assembly of the support plates.

4. The composite material center cone milling and turning fixture as described in claim 1, characterized in that, The second pressure sensor (503) is disposed on each sector panel of the disc-shaped support plate; each sector panel is fixedly connected to the support plate (502) by bolts (512).

5. The composite material center cone milling and turning fixture as described in claim 1, characterized in that, The clamping rod (504) is an L-shaped rod. One end of the clamping rod (504) is aligned with the axial direction of the central cone. The other end of the clamping rod (504) extends along the circumference of the disc-shaped support plate and is evenly distributed along the circumference of the disc-shaped support plate, and is movably supported on the limiting block (505).

6. The composite material center cone milling and turning fixture as described in any one of claims 1-5, characterized in that, The central cone turning and milling common fixture with the central cone (8) fixed thereon is mounted on the lathe worktable through the connecting shaft (1) to turn the central cone shape; After turning, the machine is mounted on the milling machine table via the connecting shaft (1) to perform milling of the outer end of the center cone.

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