Positioning tool for precision milling of screw groove of molecular pump rotor

Abstract

The utility model provides a molecular pump rotor helical groove precision milling positioning frock, including work table, the work table inboard rotationally connected with screw rod, the screw rod surface is equipped with the threaded block, the threaded block top fixed mounting has first mount, the work table top installation has second mount, first mount, second mount inboard is provided with the rotary seat, the rotary seat inboard is provided with clamping component, second mount front side is provided with adjusting assembly, and the device can adapt to the rotor of different length and diameter through adjustable structure design, has reduced the time cost of changing frock, has guaranteed the stability and reliability of clamping simultaneously, is favorable to improvement milling precision and quality, motor drive gear transmission has improved the angle adjusting efficiency, and the accuracy of mechanical drive has reduced the error of human operation introduction, has helped to promote the efficiency and quality of precision milling.

Description

Technical Field

[0001] This utility model relates to the field of molecular pump processing technology, and in particular to a positioning fixture for precision milling of the spiral groove of a molecular pump rotor. Background Technology

[0002] Molecular pumps contain high-speed rotating blades, also known as rotors, which typically rotate at tens of thousands of revolutions per minute. They are suitable for ultra-high vacuum applications, such as electron microscopy and surface science research, and are particularly well-suited for vacuum environments requiring extremely high cleanliness, such as semiconductor manufacturing and laboratory equipment. They can operate continuously for extended periods. The rotor helical grooves are key structures on the molecular pump rotor used to improve pumping efficiency and compression ratio, and are commonly found in the traction stage or compression section. The production of helical grooves for molecular pump rotors requires the use of fixtures to fix the rotors and facilitate milling. Existing positioning fixtures for milling helical grooves of molecular pump rotors do not fully consider the universal compatibility of rotors of various specifications. This increases production time and costs and makes it difficult to guarantee the consistency of batch processing accuracy, which restricts the efficiency and quality of precision milling of molecular pump rotors. Furthermore, angle adjustment relies on manual operation or fixed structures, resulting in low adjustment efficiency and easy introduction of errors.

[0003] Therefore, this utility model proposes a precision milling and positioning fixture for the helical groove of a molecular pump rotor to solve the problems existing in the prior art. Utility Model Content

[0004] To address the aforementioned issues, this invention proposes a precision milling and positioning fixture for the helical grooves of molecular pump rotors. This solves the problem that existing positioning fixtures for milling and positioning helical grooves of molecular pump rotors do not fully consider the universal adaptability of rotors of various specifications, which increases production time and costs and makes it difficult to guarantee the consistency of batch processing accuracy. This restricts the efficiency and quality of precision milling of molecular pump rotors. Furthermore, the angle adjustment relies on manual operation, resulting in complex operation steps, low adjustment efficiency, and easy introduction of errors.

[0005] To achieve the purpose of this utility model, the utility model is implemented through the following technical solution: a positioning fixture for precision milling of the spiral groove of a molecular pump rotor, including a worktable, a lead screw rotatably connected to the inner side of the worktable, a threaded block sleeved on the surface of the lead screw and threadedly connected thereto, a first mounting bracket fixedly mounted on the top of the threaded block, a second mounting bracket fixedly mounted on the top of the worktable and in front of the first mounting bracket, a rotating seat penetrating through the center of the inner side of the first mounting bracket and rotatably connected thereto, a first motor for driving the lead screw to rotate fixedly mounted on the rear side of the worktable, a clamping assembly provided inside the rotating seat, and an adjustment assembly provided in front of the second mounting bracket.

[0006] A further improvement is that the clamping assembly includes a fixed sleeve, the front and rear ends of which are rotatably connected to the inner sidewall of the adjacent rotating seat. A threaded rod is rotatably connected to the inner side of the fixed sleeve. A connecting ring is fitted on the surface of the threaded rod and threadedly connected to it. A collar is fixedly installed on the surface of the connecting ring and located at the outer edge of the fixed sleeve. A hinge rod is hingedly provided on the surface of the collar. A hinge seat is fixedly installed on the sidewall of the rotating seat. A rotating frame is rotatably connected to the inner side of the hinge seat. A clamping component is fixedly installed on one side of the rotating frame by bolts. An adjusting block for driving the threaded rod to rotate is rotatably connected to one end of the fixed sleeve.

[0007] A further improvement is that: a sliding hole is provided on the inner side of the rotating seat for the hinge rod to slide, the side of the hinge rod away from the collar is fitted with the adjacent rotating frame, and a sliding opening is provided on the surface of the fixed sleeve for the connecting ring to slide back and forth.

[0008] A further improvement is that the adjustment component includes a first gear, the rear end of which is rotatably connected to the front side of the second mounting bracket, a fixed bracket is fixedly installed on the front side of the second mounting bracket near the right side, a second motor that drives the first gear to rotate is fixedly installed on the inner side wall of the fixed bracket, and a second gear that meshes with the first gear is fixedly installed on the front rotating seat surface.

[0009] A further improvement is that the top of the workbench is provided with a movable groove for the threaded block to slide back and forth, and the two rotating seats are set at the same level.

[0010] The beneficial effects of this utility model are as follows: 1. The device, through its adjustable structural design, can adapt to rotors of different lengths and diameters, reducing the time cost of changing tooling while ensuring the stability and reliability of clamping, which is beneficial to improving the accuracy and quality of milling.

[0011] 2. The use of motor-driven gear transmission improves the efficiency of angle adjustment, and the precision of mechanical transmission reduces errors introduced by human operation, which helps to improve the efficiency and quality of precision milling. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0013] Figure 2 This is a side view of the workbench and adjustment components of this utility model.

[0014] Figure 3 This is a side sectional view of the rotating seat and clamping assembly of this utility model.

[0015] Figure 4 This is a side sectional view of the fixing sleeve of this utility model.

[0016] The components are as follows: 1. Workbench; 2. Lead screw; 3. Threaded block; 4. First mounting bracket; 5. Second mounting bracket; 6. Rotating seat; 7. First motor; 8. Clamping assembly; 801. Fixed sleeve; 802. Threaded rod; 803. Connecting ring; 804. Collar; 805. Hinge rod; 806. Rotating frame; 807. Clamping component; 808. Adjusting block; 9. Adjusting assembly; 901. First gear; 902. Second motor; 903. Fixed bracket; 904. Second gear. Detailed Implementation

[0017] To deepen the understanding of this utility model, the following detailed description will be provided in conjunction with embodiments. These embodiments are only used to explain this utility model and do not constitute a limitation on the scope of protection of this utility model.

[0018] according to Figure 1-4 As shown, this embodiment proposes a solution: a positioning fixture for precision milling of the spiral groove of a molecular pump rotor, including a worktable 1, a lead screw 2 rotatably connected to the inner side of the worktable 1, a threaded block 3 sleeved on the surface of the lead screw 2 and threadedly connected thereto, a first mounting bracket 4 fixedly mounted on the top of the threaded block 3, a second mounting bracket 5 fixedly mounted on the top of the worktable 1 and in front of the first mounting bracket 4, a rotating seat 6 passing through the center of the inner side of the first mounting bracket 4 and the second mounting bracket 5 and rotatably connected thereto, a first motor 7 for driving the lead screw 2 to rotate fixedly mounted on the rear side of the worktable 1, a clamping assembly 8 provided inside the rotating seat 6, and an adjustment assembly 9 provided in front of the second mounting bracket 5.

[0019] In this embodiment, the worktable 1 provides basic support. The first motor 7 drives the lead screw 2 to rotate, causing the threaded block 3 fitted on the lead screw 2 to slide back and forth along the moving groove of the worktable 1. This, in turn, drives the first mounting bracket 4 at the top to move synchronously. The first mounting bracket 4 and the rotating seat 6 inside the second mounting bracket 5 are kept at the same level. With the help of the clamping assembly 8, the rotor to be processed is clamped, which can adapt to molecular pump rotors of different lengths and sizes, improve the universal adaptability to multi-specification rotors, and reduce the time cost of changing tooling. Through the action of the adjustment assembly 9, the rotor angle is automatically adjusted by the motor-driven gear transmission, replacing the traditional manual operation or fixed structure, which greatly improves the angle adjustment efficiency. The precision of mechanical transmission reduces the error introduced by human operation and improves the efficiency and quality of precision milling.

[0020] The clamping assembly 8 includes a fixed sleeve 801, whose front and rear ends are rotatably connected to the inner sidewall of the adjacent rotating seat 6. A threaded rod 802 is rotatably connected to the inner side of the fixed sleeve 801. A connecting ring 803 is fitted onto the surface of the threaded rod 802 and threadedly connected thereto. A collar 804 is fixedly installed on the surface of the connecting ring 803 and located at the outer edge of the fixed sleeve 801. A hinge rod 805 is hingedly provided on the surface of the collar 804. A hinge seat is fixedly installed on the sidewall of the rotating seat 6. A rotating frame 806 is rotatably connected to the inner side of the hinge seat. A clamping member 807 is fixedly installed on one side of the rotating frame 806 by bolts. A drive thread is rotatably connected to one end of the fixed sleeve 801. The adjusting block 808, which rotates the rod 802, drives the threaded rod 802 to rotate, causing the connecting ring 803 to move back and forth along the sliding opening of the fixed sleeve 801. This causes the collar 804 to move synchronously. The hinge rod 805 on the collar 804 slides in the sliding hole of the rotating seat 6, pushing the rotating frame 806 to rotate around the hinge seat, thereby opening and closing the clamping part 807 and completing the clamping or releasing of the rotor. This can adapt to rotors of different diameters, enhancing the versatility of the tooling. At the same time, the clamping force is uniform and stable, avoiding the problem of uneven force caused by manual clamping, ensuring the reliability of rotor fixation, and helping to improve the accuracy and quality of milling.

[0021] The inner side of the rotating seat 6 is provided with a sliding hole for the hinge rod 805 to slide. The side of the hinge rod 805 away from the collar 804 is fitted with the adjacent rotating frame 806. The surface of the fixed sleeve 801 is provided with a sliding opening for the connecting ring 803 to slide back and forth. The sliding opening restricts the movement direction of the connecting ring 803, ensuring that it can only move back and forth along the axial direction, and preventing the clamping assembly 8 from shifting when it moves.

[0022] The adjustment assembly 9 includes a first gear 901, the rear end of which is rotatably connected to the front side of the second mounting bracket 5. A fixed bracket 903 is fixedly installed on the front side of the second mounting bracket 5 near the right side. A second motor 902 that drives the first gear 901 to rotate is fixedly installed on the inner wall of the fixed bracket 903. A second gear 904 that meshes with the first gear 901 is fixedly installed on the surface of the front rotating seat 6. The second motor 902 drives the first gear 901 to rotate and cooperates with the second gear 904 to make the front rotating seat 6 rotate, thereby driving the clamped rotor to adjust its angle. The automatic adjustment of the rotor angle is achieved by using a motor-driven gear transmission, which replaces the traditional manual operation or fixed structure and greatly improves the angle adjustment efficiency.

[0023] The top of the worktable 1 is provided with a movable groove for the threaded block 3 to slide back and forth. The two rotating seats 6 are set at the same level. The two rotating seats 6 are kept at the same level to ensure that the rotor is in a horizontal position when clamped, providing a stable reference for milling.

[0024] The above embodiments disclose a positioning fixture for precision milling of the helical groove of a molecular pump rotor. A first motor 7 drives a lead screw 2 to rotate, causing a threaded block 3 fitted on the lead screw 2 to slide back and forth along the moving groove of the worktable 1. This, in turn, drives the first mounting bracket 4 at the top to move synchronously. A rotating adjusting block 808 drives a threaded rod 802 to rotate, causing a connecting ring 803 to move back and forth along the sliding opening of a fixed sleeve 801. This drives a collar 804 to move synchronously. A hinge rod 805 on the collar 804 slides within the sliding hole of a rotating seat 6, pushing a rotating frame 806 to rotate around the hinge seat, thus opening and closing the clamping member 807 and completing the rotation. The clamping and releasing mechanism can accommodate rotors of different diameters, enhancing the versatility of the tooling. Simultaneously, the clamping force is uniform and stable, avoiding the uneven force issues associated with manual clamping and ensuring the reliability of rotor fixation. This improves the accuracy and quality of milling operations. The second motor 902 drives the first gear 901 to rotate, simultaneously engaging with the second gear 904 to rotate the front rotating seat 6, thereby adjusting the angle of the clamped rotor. The use of motor-driven gear transmission achieves automated rotor angle adjustment, replacing traditional manual operation or fixed structures and significantly improving angle adjustment efficiency.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A precision milling and positioning fixture for the helical groove of a molecular pump rotor, characterized in that: The device includes a workbench (1), a lead screw (2) rotatably connected to the inner side of the workbench (1), a threaded block (3) sleeved on the surface of the lead screw (2) and threadedly connected thereto, a first mounting bracket (4) fixedly installed on the top of the threaded block (3), a second mounting bracket (5) fixedly installed on the top of the workbench (1) and in front of the first mounting bracket (4), a rotating seat (6) passing through the center of the inner side of the first mounting bracket (4) and the second mounting bracket (5) and rotatably connected thereto, a first motor (7) for driving the lead screw (2) to rotate fixedly installed on the rear side of the workbench (1), a clamping assembly (8) provided on the inner side of the rotating seat (6), and an adjustment assembly (9) provided on the front side of the second mounting bracket (5).

2. The positioning fixture for precision milling of the helical groove of the molecular pump rotor according to claim 1, characterized in that: The clamping assembly (8) includes a fixed sleeve (801), the front and rear ends of which are rotatably connected to the inner sidewall of the adjacent rotating seat (6). A threaded rod (802) is rotatably connected to the inner side of the fixed sleeve (801). A connecting ring (803) is sleeved on the surface of the threaded rod (802) and threadedly connected to it. A collar (804) is fixedly installed on the surface of the connecting ring (803) and located at the outer edge of the fixed sleeve (801). A hinge rod (805) is hingedly provided on the surface of the collar (804). A hinge seat is fixedly installed on the sidewall of the rotating seat (6). A rotating frame (806) is rotatably connected to the inner side of the hinge seat. A clamping member (807) is fixedly installed on one side of the rotating frame (806) by bolts. An adjusting block (808) for driving the threaded rod (802) to rotate is rotatably connected to one end of the fixed sleeve (801).

3. The positioning fixture for precision milling of the helical groove of the molecular pump rotor according to claim 2, characterized in that: The rotating seat (6) has a sliding hole on its inner side for the hinge rod (805) to slide. The hinge rod (805) is fitted with the adjacent rotating frame (806) on the side away from the collar (804). The fixed sleeve (801) has a sliding opening on its surface for the connecting ring (803) to slide back and forth.

4. The positioning fixture for precision milling of the helical groove of the molecular pump rotor according to claim 1, characterized in that: The adjustment component (9) includes a first gear (901), the rear end of the first gear (901) is rotatably connected to the front side of the second mounting bracket (5), a fixed bracket (903) is fixedly installed on the front side of the second mounting bracket (5) near the right side, a second motor (902) that drives the first gear (901) to rotate is fixedly installed on the inner side wall of the fixed bracket (903), and a second gear (904) that meshes with the first gear (901) is fixedly installed on the surface of the front rotating seat (6).

5. The positioning fixture for precision milling of the helical groove of the molecular pump rotor according to claim 1, characterized in that: The top of the workbench (1) is provided with a movable groove for the threaded block (3) to slide back and forth, and the two rotating seats (6) are set at the same level.

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