Auxiliary positioning device for vacuum cavity machining

Abstract

The invention discloses an auxiliary positioning device for vacuum cavity machining. The auxiliary positioning device comprises a workbench, a first positioning mechanism and a second positioning mechanism. The first positioning mechanism is arranged at the front end of the top face of the workbench, the first positioning mechanism comprises a first fixing frame, a positioning ring, a first movable ring, a second movable ring, a screw and other assemblies, the first movable ring and the second movable ring can be driven to rotate through the screw under mutual cooperation, and therefore the assemblies in the positioning ring are linked to move; a first positioning mechanism is arranged at the front end of the vacuum cavity to clamp and fix the vacuum cavity, a second positioning mechanism is arranged at the rear end of the first positioning mechanism and comprises a connecting main plate, a driving motor, a second fixing frame, an unfolding mechanism and other assemblies, auxiliary supporting of the vacuum cavity can be achieved under mutual cooperation, the clamping stability is improved, and the vacuum cavity clamping device is suitable for the vacuum cavity in an irregular shape. And the application range can be effectively expanded, the using effect is improved, and machining operation of the vacuum cavity is facilitated.

Description

Technical Field

[0001] This invention relates to the field of vacuum cavity machining technology, specifically to an auxiliary positioning device for vacuum cavity machining. Background Technology

[0002] A vacuum chamber is a sealed container used to maintain an internal vacuum state. It is widely used in semiconductor manufacturing, scientific research experiments and other fields to isolate external interference and provide a stable vacuum environment to meet the needs of precision processes.

[0003] During the production and processing of vacuum chambers, welding, drilling and other processing operations are usually required on them. Before this, the vacuum chamber needs to be fixed on the worktable.

[0004] However, some vacuum cavities have thin walls, poor rigidity, and are easily deformed. In addition, some clamping and positioning devices have few clamping points, resulting in limited clamping effect and poor positioning effect when clamping the vacuum cavity. This may also cause deformation of the vacuum cavity's appearance, making it difficult to meet processing requirements. Summary of the Invention

[0005] The purpose of this invention is to provide an auxiliary positioning device for vacuum cavity machining, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an auxiliary positioning device for vacuum cavity processing, comprising a worktable, wherein a first positioning mechanism is provided at the front end of the top of the worktable, and a second positioning mechanism is provided at the rear end of the first positioning mechanism; The positioning mechanism includes a fixed frame, a positioning ring, a movable ring, a movable ring 2, and a screw. The bottom surface of the fixed frame is connected to the front end of the top surface of the workbench, and a set of positioning rings is provided at the top. Movable ring 1 and movable ring 2 are respectively connected to the outer side of the positioning rings. The outer ends of movable ring 1 and movable ring 2 are connected by a screw.

[0007] By adopting the above technical solution, the worktable provides support for positioning mechanism one and positioning mechanism two, so that positioning mechanism one and positioning mechanism two can clamp the vacuum cavity. Among them, movable ring one and movable ring two are connected by a screw to form an openable "clamp" structure. Rotating the screw can drive movable ring one and movable ring two to tighten or loosen, which can firmly clamp the vacuum cavity in the positioning ring, prevent the vacuum cavity from moving during processing, ensure the stability and safety of the processing process, and adapt to vacuum cavities of different sizes and diameters, thus enhancing the versatility of the device.

[0008] Preferably, the outer middle of the positioning ring is provided with an outer groove, and the inner front and rear positions of the outer groove are respectively connected to a movable ring one and a movable ring two. Each of the four ends of the positioning ring is provided with a set of movable arms, and the outer side of each movable arm is connected to a set of guide rods. The inner end of each movable arm extends to the inner end of the positioning ring and is connected to a set of clamping plates.

[0009] By adopting the above technical solution, the four sets of moving arms can move synchronously to the middle of the positioning ring through the guide rod, and clamp and fix the outer side of the vacuum cavity through the clamping plate, so as to realize the automatic centering and rigid clamping of the vacuum cavity.

[0010] Preferably, the right end of the movable ring is connected to the screw via a set of connecting cylinders, and both the upper and lower ends are provided with guide grooves corresponding to the guide rods.

[0011] By adopting the above technical solution, the screw rotation can drive the movable ring to rotate through the connecting cylinder, thereby allowing the movable ring to guide the guide rod and the upper and lower sets of moving arms through the guide groove, thus achieving precise guidance between the moving arms and the clamping plate.

[0012] Preferably, the front top of the movable ring II is connected to the screw via a set of connecting cylinders II, and both the left and right ends are provided with guide grooves II corresponding to the guide rods.

[0013] By adopting the above technical solution, the screw rotation can drive the movable ring two to rotate through the connecting cylinder two, thereby allowing the movable ring two to guide the guide rod and the left and right sets of moving arms through the guide groove two, so as to achieve precise guidance between the moving arms and the clamping plate.

[0014] Preferably, the second positioning mechanism includes a connecting motherboard, a drive motor, a second fixing frame, and an unfolding mechanism. The rear end of the connecting motherboard is provided with a set of drive motors, the bottom end is connected to the top surface of the worktable through the second fixing frame, and the front end is connected to the unfolding mechanism.

[0015] By adopting the above technical solution, the main board is connected to the top surface of the workbench through the second fixing frame, and the drive motor can be linked with the unfolding mechanism to unfold or retract.

[0016] Preferably, the unfolding mechanism includes a rotating shaft, a rotating panel one, and a rotating panel two. A set of rotating shafts is provided at the left and right positions of the front middle of the connecting motherboard. A set of meshing rings is provided on the outer side of the two sets of rotating shafts near the front end. A set of rotating panel one is connected to the front end of the two sets of rotating shafts. A set of rotating panel two is provided on the outer side of the two sets of rotating panel one.

[0017] By adopting the above technical solution, the two sets of rotating shafts can achieve synchronous rotation through meshing rings. Only one set of rotating shafts needs to be driven to automatically transmit power to the other set of rotating shafts through the meshing rings, which simplifies the transmission structure. Moreover, the two sets of rotating shafts can drive the two sets of rotating panels 1 and 2 at the left and right ends to move relative to each other, so as to achieve synchronous and symmetrical unfolding of rotating panel 1 and rotating panel 2.

[0018] Preferably, each of the two sets of rotating panels has a set of linkage arms one near the rotation axis on the rear end face. The other end of the linkage arm one is connected to a set of linkage arms two. The end of the linkage arm two away from the linkage arm one is provided with a set of linkage arms three. The other end of the linkage arm three is connected to a set of linkage arms four. The end of the linkage arm four away from the linkage arm three is provided with an arc-shaped arm. The other ends of the two sets of arc-shaped arms are respectively connected to the rear end faces of the left and right sets of rotating panels two.

[0019] By adopting the above technical solution, linkage arm one, linkage arm two, linkage arm three and linkage arm four form a multi-arm linkage structure. The rotation of the rotating panel one drives the rotation of linkage arm one, and finally the linkage arm four pushes the arc-shaped arm, so that the rotating panel two can move along the outside of the rotating panel one and cooperate with the rotating panel one. This can clamp and fix irregularly shaped vacuum cavities, thus improving the applicability.

[0020] Preferably, both the first rotating panel and the second rotating panel are arc-shaped, and the second rotating panel is attached to the outside of the first rotating panel and connected to the outside of the first rotating panel through a groove.

[0021] By adopting the above technical solution, the second rotating panel can move along the outside of the first rotating panel, and the second rotating panel fits against the outside of the first rotating panel to form an arc-shaped bracket, which can effectively improve the support stability, strengthen the resistance to bending and torsion, and prevent the vacuum chamber from moving due to external forces during the processing.

[0022] Preferably, the ends of the second and fourth linkage arms near the rotation axis are both connected to the front end of the main board, and the first and third linkage arms are respectively connected to the middle ends of the second and fourth linkage arms.

[0023] Preferably, the ends of the left and right linkage arms near the arc-shaped arms are both designed as curved arms, and the bending directions are opposite.

[0024] By adopting the above technical solution, when the left and right sets of rotating panels 2 are retracted, the two sets of linkage arms 4 can be staggered and retracted into the rear end of the two sets of rotating panels 2, which can avoid mutual interference between the left and right sets of linkage arms 4.

[0025] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention achieves dual clamping of the vacuum cavity by using positioning mechanism one and positioning mechanism two respectively located at the front and rear positions of the top of the worktable. Positioning mechanism one automatically centers the vacuum cavity, correcting it to the center position of positioning mechanism one, reducing human error. Positioning mechanism two provides precise height support through a drive motor and multi-link structure, which can effectively improve the clamping effect of the vacuum cavity, especially the irregularly shaped vacuum cavity, and enhance the versatility of the equipment and production efficiency. 2. The present invention utilizes a positioning mechanism 1 located at the front end of the top of the workbench. The positioning mechanism 1 includes components such as a fixed frame 1, a positioning ring, a movable ring 1, a movable ring 2, and a screw. The rotation of the screw can drive the movable ring 1 and the movable ring 2 to rotate relative to each other, thereby achieving clamping and positioning of the vacuum cavity within the positioning ring. This allows the vacuum cavity to be kept in the center position of the positioning ring. Furthermore, the multiple clamping points effectively reduce the external pressure on the vacuum cavity, preventing deformation of the outer side of the vacuum cavity due to excessive bidirectional clamping pressure during the clamping process. This effectively ensures the production quality of the vacuum cavity. 3. The present invention utilizes a second positioning mechanism located at the rear end of the top surface of the worktable. The second positioning mechanism includes components such as a connecting main board, a drive motor, a second fixing frame, and an unfolding mechanism. With their cooperation, the drive motor can drive the unfolding mechanism to move and perform secondary clamping on the vacuum cavity. The first and second rotating panels inside the unfolding mechanism can compensate and support the vacuum cavity and can adapt to vacuum cavities of different shapes. Through cooperation with the first positioning mechanism, the vacuum cavity can be kept in a horizontal position, which is beneficial for the processing of the vacuum cavity. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the positioning mechanism of the present invention; Figure 3 This is a schematic diagram of the front view of the active ring structure of the present invention; Figure 4 This is a schematic diagram of the rear view structure of the second active ring of the present invention; Figure 5 This is a schematic diagram of the second positioning mechanism of the present invention; Figure 6 This is a schematic diagram of the unfolded structure of the positioning mechanism II of the present invention; Figure 7 This is a schematic diagram of the linkage arm connection structure of the present invention; Figure 8 This is a front view schematic diagram of the internal structure of the unfolding mechanism of the present invention.

[0027] In the diagram: Workbench-1, Positioning Mechanism 1-2, Positioning Mechanism 2-3, Fixing Frame 1-21, Positioning Ring-22, Movable Ring 1-23, Movable Ring 2-24, Screw-25, Outer Groove-221, Moving Arm-222, Guide Rod-223, Clamping Plate-224, Connecting Cylinder 1-231, Guide Groove 1-232, Connecting Cylinder 2-241, Guide Groove 2-242, Connecting Main Board-31, Drive Motor-32, Fixing Frame 2-33, Unfolding Mechanism-34, Rotating Shaft-341, Rotating Panel 1-342, Rotating Panel 2-343, Engaging Ring-3411, Linkage Arm 1-3421, Linkage Arm 2-3422, Linkage Arm 3-3423, Linkage Arm 4-3424, Arc Arm-3425. Detailed Implementation

[0028] To further explain the technical solution of the present invention, a detailed description is provided below through specific embodiments.

[0029] Please see Figures 1-2 This invention provides an auxiliary positioning device for vacuum cavity processing, including a worktable 1. A positioning mechanism 1 2 is provided at the front end of the top of the worktable 1, and a positioning mechanism 2 3 is provided at the rear end of the positioning mechanism 1 2. The positioning mechanism 1 2 includes a fixed frame 1 21, a positioning ring 22, a movable ring 1 23, a movable ring 24, and a screw 25. The bottom surface of the fixed frame 1 21 is fixedly connected to the front end of the top of the worktable 1. A set of positioning rings 22 is installed at the top of the fixed frame 1 21, and movable rings 1 23 and 24 are respectively installed at the front and rear positions of the outer side of the positioning rings 22. The outer ends of movable rings 1 23 and 24 are connected by the screw 25. The rotation of the screw 25 can drive movable rings 1 23 and 24 to move relative to each other.

[0030] Specifically, the worktable 1 provides support for positioning mechanism 1 2 and positioning mechanism 2 3, so that positioning mechanism 1 2 and positioning mechanism 2 3 can clamp the vacuum cavity. Among them, movable ring 1 23 and movable ring 2 24 are connected by screw 25 to form an openable "clamp" structure. Rotating screw 25 can drive movable ring 1 23 and movable ring 2 24 to tighten or loosen, which can firmly clamp the vacuum cavity in the positioning ring 22, prevent the vacuum cavity from moving during processing, ensure the stability and safety of the processing, and adapt to vacuum cavities of different sizes and diameters, thus enhancing the versatility of the device.

[0031] Please see Figures 2-4An outer groove 221 is provided at the middle of the outer side of the positioning ring 22. A set of movable ring 1 23 and movable ring 24 are respectively installed at the front and rear positions of the inner side of the outer groove 221. Movable ring 1 23 and movable ring 24 can rotate in the outer groove 221. A set of movable arms 222 are slidably connected to all four ends of the positioning ring 22. A set of guide rods 223 are connected to the outer side of each movable arm 222. The guide rods 223 of the upper and lower movable arms 222 are set on the front end face, and the guide rods 223 of the left and right movable arms 222 are set on the rear end face. The inner ends of the four movable arms 222 extend to the inner end of the positioning ring 22 and are fixedly connected to a set of clamping plates 224. When the four movable arms 222 move inward, the vacuum cavity can be clamped and fixed by the clamping plates 224.

[0032] Specifically, the four sets of moving arms 222 can be guided by the guide rod 223 to move synchronously to the middle of the positioning ring 22, and clamp and fix the outer side of the vacuum cavity through the clamping plate 224, so as to realize the automatic centering and rigid clamping of the vacuum cavity.

[0033] Please see Figures 2-4 A set of connecting cylinders 231 is rotatably connected to the right rear end of the movable ring 23, and is connected to the screw 25 through the connecting cylinders 231. The upper and lower ends are provided with guide grooves 232 corresponding to the guide rods 223. A set of connecting cylinders 241 is rotatably connected to the front top end of the movable ring 24, and is connected to the screw 25 through the connecting cylinders 241. The left and right ends are provided with guide grooves 242 corresponding to the guide rods 223. The outer ends of the screw 25 are provided with external threads in opposite directions. The connecting cylinders 231 and 241 are provided with corresponding internal thread holes. By rotating the screw 25, the movable rings 23 and 24 can be driven to move relative to each other, thereby driving the four sets of guide rods 223 and the moving arm 222 to move through the guide grooves 232 and 242, so as to achieve clamping or releasing of the vacuum cavity.

[0034] Specifically, the rotation of the screw 25 can drive the rotation of the movable rings 23 and 24 through the connecting cylinder 231 and the connecting cylinder 241, so that the movable rings 23 and 24 can guide the guide rod 223 and the moving arm 222 to move through the guide groove 232 and the guide groove 242 respectively, thereby achieving precise guidance of the moving arm 222 and the clamping plate 224.

[0035] Please see Figure 1 , Figure 5 and Figure 6The positioning mechanism 2 3 includes a connecting main board 31, a drive motor 32, a fixing frame 2 33, and an unfolding mechanism 34. A set of drive motors 32 is installed at the rear end of the connecting main board 31. The bottom end of the connecting main board 31 is connected to the top surface of the workbench 1 through the fixing frame 2 33, and the front end is connected to the unfolding mechanism 34. The drive motor 32 can be linked with the unfolding mechanism 34 to unfold or retract. The unfolding mechanism 34 includes a rotating shaft 341, a rotating panel 1 342, and a rotating panel 2 343. A set of rotating shafts 341 is rotatably connected to the left and right positions of the front and middle ends of the connecting main board 31. The rear end of the left rotating shaft 341 extends through to the rear end of the connecting main board 31 and is fixedly connected to the front end of the drive shaft of the drive motor 32. The drive motor 32 can drive the left rotating shaft 341 to rotate. A set of engaging rings 3411 is fixedly connected to the outer side of both sets of rotating shafts 341 near the front end. A set of engaging rings 3411 is fixedly connected to the outer side of both sets of engaging rings 3411. The intermeshing teeth enable synchronous relative rotation of two sets of rotating shafts 341. Each set of rotating shafts 341 has a set of rotating panels 342 fixedly connected to its front end. Each set of rotating panels 342 has a set of rotating panels 343 in contact with its outer side. Furthermore, both rotating panels 342 and 343 are arc-shaped, with rotating panels 343 fitting against the outer side of rotating panels 342. A "T"-shaped groove is provided on the outer side of rotating panels 342, and a corresponding sliding plate is provided on the inner side of rotating panels 343. Rotating panels 343 are connected to the outer side of rotating panels 342 through the groove and sliding plate. Rotating panels 343 can move along the outer side of rotating panels 342, and fitting against the outer side of rotating panels 342 to form an arc-shaped bracket, which can effectively improve support stability, enhance the ability to resist bending and torsion, and prevent the vacuum chamber from moving due to external forces during processing.

[0036] Specifically, the two sets of rotating shafts 341 can achieve synchronous rotation through meshing rings 3411. Only one set of rotating shafts 341 needs to be driven to automatically transmit power to the other set of rotating shafts 341 through the meshing rings 3411, which simplifies the transmission structure. Moreover, the two sets of rotating shafts 341 can drive the two sets of rotating panels 342 and 343 at the left and right ends to move relative to each other, so as to achieve synchronous and symmetrical unfolding of rotating panels 342 and 343.

[0037] Please see Figures 6-8Each of the two sets of rotating panels 342 has a set of linkage arms 3421 installed on its rear end face near the rotating shaft 341. The other end of linkage arm 3421 is connected to a second linkage arm 3422. A third linkage arm 3423 is hinged to the end of linkage arm 3422 away from linkage arm 3421. The other end of linkage arm 3423 is connected to a fourth linkage arm 3424. The ends of linkage arms 3422 and 3424 near the rotating shaft 341 are connected to the front end face of the main board 31. Linkage arms 3421 and 3423 are respectively connected to the middle of linkage arms 3422 and 3424, thus limiting the movement of linkage arm 3422. The rotation path of 422 and linkage arm four 3424 is further described. The ends of the left and right linkage arms four 3424 near the arc arm 3425 are both curved arm designs, and the bending directions are opposite. When the left and right rotating panels two 343 are retracted, the two linkage arms four 3424 can be staggered and retracted into the rear end of the two rotating panels two 343, which can avoid the left and right linkage arms four 3424 interfering with each other. The end of linkage arm four 3424 away from linkage arm three 3423 is hinged with arc arm 3425. The other ends of the two arc arms 3425 are respectively connected to the rear end face of the left and right rotating panels two 343, which can drive the two rotating panels two 343 to move along the outside of rotating panel one 342.

[0038] Specifically, linkage arm 1 3421, linkage arm 2 3422, linkage arm 3423 and linkage arm 4 3424 form a multi-arm linkage structure. The rotation of the rotating panel 1 342 drives the rotation of linkage arm 1 3421, and finally the linkage arm 4 3424 pushes the arc-shaped arm 3425, so that the rotating panel 2 343 can move along the outside of the rotating panel 1 342 and cooperate with the rotating panel 1 342 to clamp and fix irregularly shaped vacuum cavities, thus improving the applicability.

[0039] This invention provides an auxiliary positioning device for vacuum cavity machining. The invention utilizes positioning mechanism 2 and positioning mechanism 3, respectively positioned at the front and rear of the top surface of a worktable 1, to achieve dual clamping of the vacuum cavity. Positioning mechanism 2 automatically centers the vacuum cavity, aligning it to its center position and reducing human error. Positioning mechanism 3, through a drive motor 32 and a multi-link structure, provides precise height support, effectively improving the clamping effect on vacuum cavities, especially those with irregular shapes, thus enhancing equipment versatility and production efficiency. Positioning mechanism 2, located at the front of the top surface of the worktable 1, includes a fixed frame 21, a positioning ring 22, a movable ring 23, a movable ring 24, and a screw 25. Rotation of the screw 25 causes relative rotation of movable rings 23 and 24, thereby achieving the positioning of the positioning ring 21. The clamping and positioning of the vacuum cavity within the positioning ring 22 keeps it centered on the positioning ring 22. The multiple clamping points effectively reduce external pressure on the vacuum cavity, preventing deformation of the outer side of the vacuum cavity due to excessive pressure during clamping, thus ensuring the production quality of the vacuum cavity. The positioning mechanism 2 3, located at the rear end of the top surface of the worktable 1, includes components such as a connecting main board 31, a drive motor 32, a fixing frame 2 33, and an unfolding mechanism 34. These components work together, with the drive motor 32 driving the unfolding mechanism 34 to perform secondary clamping of the vacuum cavity. The rotating panels 1 342 and 2 343 within the unfolding mechanism 34 provide compensating support for the vacuum cavity and can adapt to vacuum cavities of different shapes. In conjunction with the positioning mechanism 2, the vacuum cavity remains horizontal, facilitating its processing.

[0040] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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. An auxiliary positioning device for vacuum cavity machining, characterized in that: The workbench (1) is provided with a set of positioning mechanism one (2) at the front end of the top of the workbench (1), and a positioning mechanism two (3) is provided at the rear end of the positioning mechanism one (2). The positioning mechanism 1 (2) includes a fixed frame 1 (21), a positioning ring (22), a movable ring 1 (23), a movable ring 2 (24) and a screw (25). The bottom surface of the fixed frame 1 (21) is connected to the front end of the top surface of the workbench (1), and a set of positioning rings (22) is provided at the top. The outer side of the positioning rings (22) is connected to the movable ring 1 (23) and the movable ring 2 (24) respectively. The outer ends of the movable ring 1 (23) and the movable ring 2 (24) are connected by the screw (25).

2. The auxiliary positioning device for vacuum cavity machining according to claim 1, characterized in that: The positioning ring (22) has an outer groove (221) at the middle of its outer side. The inner front and rear positions of the outer groove (221) are respectively connected to a movable ring one (23) and a movable ring two (24). The positioning ring (22) has a set of movable arms (222) at each of its four ends. The movable arms (222) are connected to a set of guide rods (223) on their outer sides. The inner ends of the movable arms (222) extend to the inner end of the positioning ring (22) and are connected to a set of clamping plates (224).

3. The auxiliary positioning device for vacuum cavity machining according to claim 2, characterized in that: The right end of the movable ring (23) is connected to the screw (25) through a set of connecting cylinders (231), and the upper and lower ends are provided with guide grooves (232) corresponding to the guide rods (223).

4. The auxiliary positioning device for vacuum cavity machining according to claim 2, characterized in that: The front top of the movable ring 2 (24) is connected to the screw (25) through a set of connecting cylinder 2 (241), and the left and right ends are provided with guide groove 2 (242) corresponding to the guide rod (223).

5. The auxiliary positioning device for vacuum cavity machining according to claim 1, characterized in that: The second positioning mechanism (3) includes a connecting motherboard (31), a drive motor (32), a second fixing frame (33) and an unfolding mechanism (34). The connecting motherboard (31) has a set of drive motors (32) at its rear end, and its bottom end is connected to the top surface of the workbench (1) through the second fixing frame (33). The front end is connected to the unfolding mechanism (34).

6. The auxiliary positioning device for vacuum cavity machining according to claim 5, characterized in that: The unfolding mechanism (34) includes a rotating shaft (341), a rotating panel one (342) and a rotating panel two (343). A set of rotating shafts (341) is provided at the left and right positions of the front middle of the connecting main board (31). A set of meshing rings (3411) is provided on the outer side of the two sets of rotating shafts (341) near the front end. A set of rotating panel one (342) is connected to the front end of the two sets of rotating shafts (341). A set of rotating panel two (343) is provided on the outer side of the two sets of rotating panel one (342).

7. The auxiliary positioning device for vacuum cavity machining according to claim 6, characterized in that: Both sets of rotating panels (342) have a set of linkage arms (3421) at the rear end face near the rotating shaft (341). The other end of the linkage arm (3421) is connected to a set of linkage arms (3422). The end of the linkage arm (3422) away from the linkage arm (3421) is provided with a set of linkage arms (3423). The other end of the linkage arm (3423) is connected to a set of linkage arms (3424). The end of the linkage arm (3424) away from the linkage arm (3423) is provided with an arc arm (3425). The other ends of the two sets of arc arms (3425) are respectively connected to the rear end face of the left and right sets of rotating panels (343).

8. The auxiliary positioning device for vacuum cavity machining according to claim 7, characterized in that: Both the first rotating panel (342) and the second rotating panel (343) are arc-shaped, and the second rotating panel (343) is attached to the outside of the first rotating panel (342) and connected to the outside of the first rotating panel (342) through a groove.

9. The auxiliary positioning device for vacuum cavity machining according to claim 7, characterized in that: The ends of the second (3422) and the fourth (3424) of the linkage arm are connected to the front end of the main board (31) near the rotation axis. The first (3421) and the third (3423) of the linkage arm are respectively connected to the middle of the second (3422) and the fourth (3424).

10. The auxiliary positioning device for vacuum cavity machining according to claim 9, characterized in that: Both of the left and right sets of linkage arms four (3424) have a curved arm design at the end near the arc arm (3425), and the bending directions are opposite.

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