Clamp for machining automobile gear VVT rotor cover plate

Abstract

The invention relates to the technical field of rotor cover plate machining, and discloses an automobile gear VVT rotor cover plate machining clamp which comprises a machine tool workbench, a machining center cutter is fixedly connected to the side face of the machine tool workbench, a mounting plate is fixedly connected to the side face of an inner supporting leg of the machine tool workbench, and an outer fixing mechanism is fixedly connected to the top end of the mounting plate. An inner fixing mechanism is fixedly connected to the top end of the outer fixing mechanism, a supporting mechanism is movably connected to the side face of the mounting plate, a supporting frame is fixedly connected to the top end of the machine tool workbench, and a to-be-machined cover plate is placed at the top end of the supporting frame. A hydraulic rod drives a conical block to move downwards through a connecting block, the conical block moves downwards to enable a bent rod to rotate around a fixing shaft, the bent rod rotates to drive an upper arc-shaped block to move towards a to-be-machined cover plate, the upper arc-shaped block moves the to-be-machined cover plate inwards and presses downwards to be fixed, the to-be-machined cover plate is automatically clamped and fixed, the fixing speed is increased, and the machining efficiency is improved. And horizontal inclination of the cover plate is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of rotor cover plate processing, and more particularly to a fixture for processing an automotive gear VVT rotor cover plate. Background Art

[0002] VVT is an abbreviation for variable valve timing technology, which refers to a technology that optimizes combustion efficiency to improve power performance and fuel economy by adjusting the opening and closing time and angle of the engine intake and exhaust valves. It usually controls the camshaft phase through hydraulic pressure or solenoid valves to change the valve timing angle. The VVT variable valve timing system is an indispensable part of the engine and is essential for the automotive industry.

[0003] The VVT rotor cover plate is a part of the VVT phase actuator. Its main function is to seal and protect the internal mechanical components to ensure the normal operation of the hydraulic system. The VVT rotor cover plate usually includes components such as a stator, a rotor, a drive wheel, and a cover plate. The stator is an annular body, and several partition cavities are annularly provided on its inner peripheral wall. The rotor includes a cylindrical portion and a wheel shaft portion provided at one end of the cylindrical portion. Several blades are provided on the outer peripheral wall of the cylindrical portion, and these blades are respectively rotatably provided in different partition cavities. The drive wheel and the cover plate are respectively located at both ends of the stator.

[0004] When the current VVT rotor cover plate is being processed, it is necessary to process both the center and the periphery of the rotor cover plate. Therefore, when performing center processing, it is necessary to fix it on the outside. When fixing the cover plate nowadays, since the surface of the cover plate is circular, the current fixing method is generally to position it manually. After fixing the cover plate, it is also necessary to measure the changed surface to avoid tilting.

[0005] After the outside of the rotor cover plate is fixed, when the center processing work is completed, if the outside processing work is to be carried out, the fixture for fixing will hinder the cutting tool for processing. Therefore, it is necessary to disassemble the fixture and then perform the clamping work again. The repeated clamping work will affect the overall processing efficiency. Summary of the Invention

[0006] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a fixture for processing an automotive gear VVT rotor cover plate to solve the technical problems proposed in the background art.

[0007] To achieve the above object, the present invention provides the following technical solution: A fixture for machining an automotive gear VVT rotor cover plate, including a machine tool workbench, a machining center tool is fixedly connected to the side of the machine tool workbench, an installation plate is fixedly connected to the side of the inner support leg of the machine tool workbench, an outer fixing mechanism is fixedly connected to the top of the installation plate, an inner fixing mechanism is fixedly connected to the top of the outer fixing mechanism, a support mechanism is movably connected to the side of the installation plate, a support frame is fixedly connected to the top of the machine tool workbench, and a cover plate to be machined is placed on the top of the support frame; The outer fixing mechanism includes a servo hydraulic that can provide power, a hydraulic rod is fixedly connected to the top of the servo hydraulic, a connecting block is fixedly connected to the top of the hydraulic rod, a conical block is fixedly connected to the top of the connecting block, lower arc-shaped blocks are movably connected to the four sides of the connecting block, a bent rod is fixedly connected to the top of the lower arc-shaped block, and an upper arc-shaped block is fixedly connected to the top of the bent rod close to the side of the cover plate to be machined.

[0008] In a preferred embodiment, the central axes of the support frame and the outer fixing mechanism coincide, the bottom end of the support mechanism is fixedly connected to the top of the machine tool workbench, and the outer fixing mechanism is located on one side of the top of the machine tool workbench.

[0009] In a preferred embodiment, a fixed shaft is movably connected to the middle of the bent rod, a fixing plate is fixedly connected to the bottom end of the fixed shaft, the bottom end of the fixing plate is fixedly connected to the top of the support mechanism, and the inside of the top end of the conical block is fixedly connected to the inner fixing mechanism.

[0010] In a preferred embodiment, the conical block is an inverted quadrangular pyramid, the side of the lower arc-shaped block is always in contact with the sides of the connecting block and the conical block, the servo hydraulic can control the vertical movement of the hydraulic rod, and the inner fixing mechanism is located at the center of the top end of the conical block.

[0011] In a preferred embodiment, the inner fixing mechanism includes a servo motor located inside the conical block and fixedly connected to the conical block, a threaded rod is fixedly connected to the top of the servo motor, a moving plate is threadedly connected to the side of the threaded rod, support plates are movably sleeved on the top ends of the four sides of the moving plate, a rotating plate is movably sleeved on the side of the support plate, an extension block is movably sleeved on the top end of the rotating plate close to the side of the support plate, and a top plate is fixedly connected to the side of the extension block away from the rotating plate.

[0012] In a preferred embodiment, the bottom end of the top plate is movably connected to the top end of the threaded rod, fixing rods are fixedly connected to the dead corners of the bottom end of the top plate, the sides of the fixing rods are movably connected to the inside of the moving plate, and the bottom ends of the fixing rods are fixedly connected to the top end of the servo motor.

[0013] In a preferred embodiment, a connecting rod is fixedly connected to the bottom end of the rotating plate, and a fixed ball is fixedly connected to the bottom end of the connecting rod. When the fixed ball moves close to the threaded rod, the distance between the outer sides of the two fixed balls on the straight line is smaller than the diameter of the central through hole of the cover plate to be processed.

[0014] In a preferred embodiment, the support mechanism includes a fixed frame that can be fixed. A sliding block is movably connected inside the fixed frame, a limiting rod is movably connected inside the sliding block, a support block is fixedly connected to the side of the sliding block close to the bent rod, a support spring is sleeved on the side of the limiting rod, and the support spring is located on the side of the sliding block away from the support block.

[0015] Technical effects and advantages of the present invention:

[0016] 1. In the present invention, by providing a conical block, a bent rod, and an upper arc-shaped block, when the servo hydraulic pressure is started to drive the hydraulic rod to move downward, the hydraulic rod drives the conical block to move downward through the connecting block. The downward movement of the conical block causes the bent rod to rotate around the fixed shaft. After the bent rod rotates, it drives the upper arc-shaped block to move towards the cover plate to be processed. The upper arc-shaped block moves the cover plate to be processed inward and presses it to fix it, automatically clamping and fixing the cover plate to be processed, improving the fixing speed and avoiding the horizontal inclination of the cover plate.

[0017] 2. In the present invention, by providing a conical block, a moving plate, and a support plate, after the inside of the cover plate to be processed is machined, at this time the conical block moves upward. After the conical block moves upward and the fixed ball is located above the cover plate to be processed, the servo motor is started to drive the threaded rod to rotate. The rotation of the threaded rod causes the moving plate to move upward, and the moving plate drives the support plate to move upward, so that the fixed ball opens outward. After being located inside the counterbore of the cover plate to be processed, the conical block moves downward, thereby fixing the center of the cover plate to be processed, facilitating the machining of the outer side of the cover plate to be processed.

[0018] 3. In the present invention, by providing a support spring, a sliding block, and a support block, when machining the outer side of the cover plate to be processed, the side of the lower arc-shaped block contacts the side of the connecting block. At this time, the support spring will apply an elastic force to the sliding block. The sliding block subjected to the elastic force maintains the contact state between the support block and the connecting block, thereby causing the upper arc-shaped block above to move away from the cover plate to be processed. At this time, it can be avoided that when the machining center tool processes the cover plate to be processed, it will collide with the upper arc-shaped block by mistake. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the overall exploded structure of the present invention.

[0021] Figure 3Schematic structural diagram of the external fixation mechanism of the present invention.

[0022] Figure 4 Exploded schematic structural diagram of the external fixation mechanism of the present invention.

[0023] Figure 5 Schematic structural diagram of the internal fixation mechanism of the present invention.

[0024] Figure 6 Schematic structural diagram of the connection structure between the internal fixation mechanism and the conical block of the present invention.

[0025] Figure 7 Exploded schematic structural diagram of the internal fixation mechanism of the present invention.

[0026] Figure 8 Schematic structural diagram of the support mechanism of the present invention.

[0027] Reference numerals are: 1, machine tool workbench; 2, machining center tool; 3, mounting plate; 4, external fixation mechanism; 401, servo hydraulic pressure; 402, hydraulic rod; 403, connecting block; 404, conical block; 405, lower arc block; 406, bending rod; 407, upper arc block; 408, fixed shaft; 409, fixing plate; 5, internal fixation mechanism; 501, servo motor; 502, threaded rod; 503, top plate; 504, fixed rod; 505, moving plate; 506, extension block; 507, rotating plate; 508, connecting rod; 509, fixed ball; 510, support plate; 6, support mechanism; 601, fixed frame; 602, sliding block; 603, limiting rod; 604, support spring; 605, support block; 7, support frame; 8, cover plate to be processed. Detailed implementation manners

[0028] Next, the technical solutions in the present invention will be clearly and completely described in conjunction with the drawings in the present invention. In addition, the forms of the various structures described in the following embodiments are merely examples, and a fixture for processing an automotive gear VVT rotor cover plate related to the present invention is not limited to the various structures described in the following embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0029] Refer to Figure 1 And Figure 2, the present invention provides a fixture for machining the VVT rotor cover plate of an automotive gear, including a machine tool workbench 1. A machining center tool 2 is fixedly connected to the side of the machine tool workbench 1. An installation plate 3 is fixedly connected to the side of the inner support leg of the machine tool workbench 1. An outer fixing mechanism 4 is fixedly connected to the top of the installation plate 3. An inner fixing mechanism 5 is fixedly connected to the top of the outer fixing mechanism 4. A support mechanism 6 is movably connected to the side of the installation plate 3. A support frame 7 is fixedly connected to the top of the machine tool workbench 1. A cover plate 8 to be machined is placed on the top of the support frame 7. The central axes of the support frame 7 and the outer fixing mechanism 4 coincide. The bottom end of the support mechanism 6 is fixedly connected to the top of the machine tool workbench 1. The outer fixing mechanism 4 is located on one side of the top of the machine tool workbench 1.

[0030] In the embodiment of the present application, the outer fixing mechanism 4 is located on one side of the top of the machine tool workbench 1. Therefore, the outer fixing mechanism 4 performs clamping work on one side of the machine tool workbench 1, while the other side of the machine tool workbench 1 can perform other machining operations, making the present application more flexible when in use. The central axes of the support frame 7 and the outer fixing mechanism 4 coincide, and they match each other, facilitating the clamping work of the cover plate 8 to be machined. The outer fixing mechanism 4 is fixedly connected to the top of the installation plate 3, and the installation plate 3 can support the outer fixing mechanism 4 to ensure the stability of the outer fixing mechanism 4 during operation.

[0031] Refer to Figure 3 And Figure 4 , the outer fixing mechanism 4 includes a servo-hydraulic 401 that can provide power. A hydraulic rod 402 is fixedly connected to the top of the servo-hydraulic 401. A connecting block 403 is fixedly connected to the top of the hydraulic rod 402. A conical block 404 is fixedly connected to the top of the connecting block 403. Lower arc-shaped blocks 405 are movably connected to the four sides of the connecting block 403. A bending rod 406 is fixedly connected to the top of the lower arc-shaped block 405. An upper arc-shaped block 407 is fixedly connected to the top of the bending rod 406 near the side of the cover plate 8 to be machined. A fixed shaft 408 is movably connected to the middle of the bending rod 406. A fixing plate 409 is fixedly connected to the bottom of the fixed shaft 408. The bottom end of the fixing plate 409 is fixedly connected to the top of the support mechanism 6. The inside of the top of the conical block 404 is fixedly connected to the inner fixing mechanism 5. The conical block 404 is an inverted quadrangular pyramid. The side of the lower arc-shaped block 405 is always in contact with the sides of the connecting block 403 and the conical block 404. The servo-hydraulic 401 can control the vertical movement of the hydraulic rod 402. The inner fixing mechanism 5 is located at the center of the top of the conical block 404.

[0032] In the embodiment of the present application, after the hydraulic rod 402 moves downward, the conical block 404 will move downward. When the conical block 404 moves downward, the lower arc-shaped block 405 changes from contacting the connecting block 403 to contacting the side surface of the conical block 404. At this time, the lower arc-shaped block 405 drives the bending rod 406 to rotate around the fixed shaft 408. After rotation, the upper arc-shaped block 407 above the bending rod 406 approaches the cover plate 8 to be processed. Finally, the side surface of the bending rod 406 limits the side surface of the cover plate 8 to be processed, and the upper arc-shaped block 407 presses down on the upper part of the cover plate 8 to be processed. The four bending rods 406 automatically move the cover plate 8 to be processed to the center position of the support frame 7, automatically fix the outside of the cover plate 8 to be processed. At this time, the processing at the center of the cover plate 8 to be processed can be carried out, and the positioning and clamping work can be automatically carried out.

[0033] Referring to Figure 5 , Figure 6 and Figure 7 , the internal fixing mechanism 5 includes a servo motor 501 located inside the conical block 404 and fixedly connected to the conical block 404. The top end of the servo motor 501 is fixedly connected with a threaded rod 502. The side surface of the threaded rod 502 is threadedly connected with a moving plate 505. The top ends of the four sides of the moving plate 505 are all movably sleeved with support plates 510. The side surface of the support plate 510 is movably sleeved with a rotating plate 507. The rotating plate 507 is movably sleeved with an extension block 506 near the top end of the side surface of the support plate 510. The side surface of the extension block 506 away from the rotating plate 507 is fixedly connected with a top plate 503. The bottom end of the top plate 503 is movably connected with the top end of the threaded rod 502. Dead corners at the bottom end of the top plate 503 are all fixedly connected with fixing rods 504. The side surface of the fixing rod 504 is movably connected with the inner side of the moving plate 505. The bottom end of the fixing rod 504 is fixedly connected with the top end of the servo motor 501. The bottom end of the rotating plate 507 is fixedly connected with a connecting rod 508. The bottom end of the connecting rod 508 is fixedly connected with a fixing ball 509. When the fixing ball 509 approaches the threaded rod 502, the distance between the outer sides of the two fixing balls 509 on the straight line is less than the diameter of the central through hole of the cover plate 8 to be processed.

[0034] In the embodiment of the present application, when the servo motor 501 drives the threaded rod 502 to rotate, the moving plate 505 moves upward. When the moving plate 505 moves upward, it drives the support plate 510 to move upward. When the support plate 510 moves upward, the rotating plate 507 rotates upward around the extension block 506. When the rotating plate 507 rotates upward, the rotating plate 507 drives the fixed ball 509 to rotate upward through the connecting rod 508. At this time, the fixed ball 509 opens outward, and between the extension block 506 and the rotating plate 507, between the rotating plate 507 and the support plate 510, and between the support plate 510 and the moving plate 505 are all connected by a rotating shaft to ensure that they can rotate. The side surface of the fixed ball 509 contacts the inner side surface of the counterbore of the to-be-processed cover plate 8, so that after the to-be-processed cover plate 8 is positioned, the servo motor 501 stops. Then, when the tapered block 404 moves downward to fix the to-be-processed cover plate 8, the tapered block 404 pauses, thus fixing the to-be-processed cover plate 8. At this time, it is convenient to process the outer side of the to-be-processed cover plate 8. Therefore, when the center and the outer side of the to-be-processed cover plate 8 are processed in the present application, they can be automatically clamped and fixed respectively, with high automation and more accurate processing.

[0035] Refer to Figure 4 There is Figure 8 , the support mechanism 6 includes a fixed frame 601 that can be fixed. The inside of the fixed frame 601 is movably connected with a sliding block 602. The inside of the sliding block 602 is movably connected with a limiting rod 603. The side of the sliding block 602 close to the bending rod 406 is fixedly connected with a support block 605. A support spring 604 is sleeved on the side of the limiting rod 603. The support spring 604 is located on the side of the sliding block 602 away from the support block 605.

[0036] In the embodiment of the present application, when the bending rod 406 moves downward close to the support block 605, it will cause the support block 605 to move into the fixed frame 601. When the support block 605 moves, it will drive the sliding block 602 to move and compress the support spring 604. When the tapered block 404 moves away from the side of the lower arc block 405, the side of the connecting block 403 contacts the side of the lower arc block 405. Therefore, the compressed support spring 604 will reset, so that the support block 605 remains in contact with the bending rod 406, and further makes the upper part of the upper arc block 407 move away from the to-be-processed cover plate 8, avoiding the situation that when the machining center tool 2 processes the to-be-processed cover plate 8, it may collide with the upper arc block 407 by mistake, making the overall machining process of the present application safer.

[0037] Working principle of the present invention: When the cover plate 8 to be processed needs to be processed, the unprocessed cover plate 8 to be processed is placed above the support frame 7. After placement, the servo hydraulic pressure 401 is activated and drives the hydraulic rod 402 to move downward. When the hydraulic rod 402 moves downward, it drives the conical block 404 to move downward through the connecting block 403. When the conical block 404 moves downward, the lower arc-shaped block 405 changes from contacting the connecting block 403 to contacting the side surface of the conical block 404. At this time, the lower arc-shaped block 405 drives the bending rod 406 to rotate around the fixed shaft 408. After rotation, the upper arc-shaped block 407 above the bending rod 406 approaches the cover plate 8 to be processed. Finally, the side surface of the bending rod 406 limits the side surface of the cover plate 8 to be processed, and the upper arc-shaped block 407 presses down on the upper part of the cover plate 8 to be processed. The four bending rods 406 automatically move the cover plate 8 to be processed to the center position of the support frame 7, and the four upper arc-shaped blocks 407 can stably press down on the cover plate 8 to be processed;

[0038] After the upper arc-shaped block 407 presses down on the cover plate 8 to be processed, at this time, the machining center tool 2 processes the through hole and the counterbore inside the cover plate 8 to be processed. When the upper arc-shaped block 407 moves close to the cover plate 8 to be processed, the lower part of the bending rod 406 moves close to the support block 605. At this time, the support block 605 will move into the inside of the fixed frame 601. When the support block 605 moves, it will drive the sliding block 602 to move and compress the support spring 604;

[0039] After processing the inside of the cover plate 8 to be processed, the servo hydraulic pressure 401 drives the hydraulic rod 402 to move upward. When the hydraulic rod 402 moves upward, it drives the conical block 404 to move upward through the connecting block 403. At this time, the conical block 404 moves away from the side surface of the lower arc-shaped block 405, and the side surface of the connecting block 403 contacts the side surface of the lower arc-shaped block 405. Therefore, the compressed support spring 604 will reset, so that the support block 605 maintains contact with the bending rod 406, and further makes the upper part of the upper arc-shaped block 407 move away from the cover plate 8 to be processed;

[0040] When the conical block 404 moves upward, it drives the entire inner fixing mechanism 5 to move upward. At this time, the fixing ball 509 will move above the counterbore machined on the cover plate 8 to be processed. After the fixing ball 509 moves above the cover plate 8 to be processed, the servo motor 501 starts. When the servo motor 501 starts, it drives the threaded rod 502 to rotate. When the threaded rod 502 rotates, the moving plate 505 moves upward. When the moving plate 505 moves upward, it drives the support plate 510 to move upward. When the support plate 510 moves upward, the rotating plate 507 rotates upward around the extension block 506. When the rotating plate 507 rotates upward, the rotating plate 507 drives the fixing ball 509 to rotate upward through the connecting rod 508. At this time, the fixing ball 509 opens outward. The fixing ball 509 is located in the counterbore of the cover plate 8 to be processed. The conical block 404 moves downward, causing the fixing ball 509 to move downward, and the side surface of the fixing ball 509 contacts the inner side surface of the counterbore of the cover plate 8 to be processed. After positioning the cover plate 8 to be processed, the servo motor 501 stops. After the conical block 404 moves downward to fix the cover plate 8 to be processed, the conical block 404 pauses, thereby fixing the cover plate 8 to be processed. At this time, it is convenient to process the outer side of the cover plate 8 to be processed;

[0041] After the cover plate 8 to be processed is completed, the servo hydraulic 401 directly controls the conical block 404 to move upward. At this time, the conical block 404 will move the cover plate 8 to be processed upward. At this time, the servo motor 501 controls the threaded rod 502 to reverse, causing the fixing ball 509 to contract inward, thereby releasing the cover plate 8 to be processed. After releasing, after the fixing ball 509 contracts inside the support frame 7, the servo hydraulic 401 drives the fixing ball 509 to move below the support frame 7. At this time, the processing work of the next cover plate 8 to be processed is carried out.

[0042] Finally: The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A fixture for machining the VVT rotor cover plate of an automotive gear, comprising a machine tool workbench (1), characterized in that: A machining center tool (2) is fixedly connected to the side of the machine tool workbench (1). An installation plate (3) is fixedly connected to the side of the support leg inside the machine tool workbench (1). An external fixing mechanism (4) is fixedly connected to the top of the installation plate (3). An internal fixing mechanism (5) is fixedly connected to the top of the external fixing mechanism (4). A support mechanism (6) is movably connected to the side of the installation plate (3). A support frame (7) is fixedly connected to the top of the machine tool workbench (1). A cover plate to be machined (8) is placed on the top of the support frame (7); The external fixing mechanism (4) includes a servo hydraulic (401) that can provide power. A hydraulic rod (402) is fixedly connected to the top of the servo hydraulic (401). A connecting block (403) is fixedly connected to the top of the hydraulic rod (402). A conical block (404) is fixedly connected to the top of the connecting block (403). Lower arc-shaped blocks (405) are movably connected to the four sides of the connecting block (403). A bending rod (406) is fixedly connected to the top of the lower arc-shaped block (405). An upper arc-shaped block (407) is fixedly connected to the top of the bending rod (406) close to the side of the cover plate to be machined (8).

2. The fixture for machining the VVT rotor cover plate of an automotive gear according to claim 1, wherein: The central axis of the support frame (7) coincides with that of the external fixing mechanism (4). The bottom end of the support mechanism (6) is fixedly connected to the top of the machine tool workbench (1). The external fixing mechanism (4) is located on one side of the top of the machine tool workbench (1).

3. The fixture for machining the VVT rotor cover plate of an automotive gear, as described in claim 1, is characterized in that: A fixed shaft (408) is movably connected to the middle of the bending rod (406). A fixing plate (409) is fixedly connected to the bottom end of the fixed shaft (408). The bottom end of the fixing plate (409) is fixedly connected to the top of the support mechanism (6). The inside of the top end of the conical block (404) is fixedly connected to the internal fixing mechanism (5).

4. A fixture for machining the VVT rotor cover plate of an automotive gear, characterized in that: The conical block (404) is an inverted quadrangular pyramid. The side of the lower arc-shaped block (405) is always in contact with the sides of the connecting block (403) and the conical block (404). The servo hydraulic (401) can control the vertical movement of the hydraulic rod (402). The internal fixing mechanism (5) is located at the center of the top end of the conical block (404).

5. A fixture for machining the VVT rotor cover plate of an automotive gear, characterized in that: The internal fixing mechanism (5) includes a servo motor (501) located inside the conical block (404) and fixedly connected to the conical block (404). A threaded rod (502) is fixedly connected to the top of the servo motor (501). A moving plate (505) is threadedly connected to the side of the threaded rod (502). Support plates (510) are movably sleeved on the top ends of the four sides of the moving plate (505). Rotating plates (507) are movably sleeved on the sides of the support plates (510). Extension blocks (506) are movably sleeved on the top ends of the sides of the rotating plates (507) close to the support plates (510). A top plate (503) is fixedly connected to the side of the extension block (506) away from the rotating plate (507).

6. The fixture for machining the VVT rotor cover plate of an automotive gear, as claimed in claim 5, wherein: The bottom end of the top plate (503) is movably connected to the top end of the threaded rod (502). Fixed rods (504) are fixedly connected to the dead corners at the bottom end of the top plate (503). The sides of the fixed rods (504) are movably connected to the inner sides of the moving plates (505). The bottom ends of the fixed rods (504) are fixedly connected to the top ends of the servo motors (501).

7. A fixture for machining the VVT rotor cover plate of an automotive gear, characterized in that: The bottom end of the rotating plate (507) is fixedly connected to a connecting rod (508). The bottom end of the connecting rod (508) is fixedly connected to a fixed ball (509). When the fixed ball (509) moves close to the threaded rod (502), the distance between the outer sides of the two fixed balls (509) on a straight line is smaller than the diameter of the central through hole of the cover plate (8) to be processed.

8. A fixture for machining the VVT rotor cover plate of an automotive gear, characterized in that: The support mechanism (6) includes a fixed frame (601) that can be fixed. A sliding block (602) is movably connected inside the fixed frame (601). A limiting rod (603) is movably connected inside the sliding block (602). A support block (605) is fixedly connected to the side of the sliding block (602) close to the bending rod (406). A support spring (604) is sleeved on the side of the limiting rod (603). The support spring (604) is located on the side of the sliding block (602) away from the support block (605).

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