An ultrasonic welding tool for machining a central channel body assembly

Abstract

The utility model discloses a kind of for central passage body assembly processing with ultrasonic welding tooling, it is related to welding tooling technical field, including die base plate and backing plate, the first compacting mechanism has in the backing plate top, the second compacting mechanism has in the top of one end of the backing plate, the third compacting mechanism has in die base plate one end, the fourth compacting mechanism has in the other end of die base plate.The utility model is positioned to the accurate preposition of the position of each component of central passage body by layered positioning structure on die base plate and backing plate, realizes the quick response and one-time accurate positioning of clamping process, in combination with the multi-angle compacting system formed by rotary cylinder drive connecting rod, movable rod and briquetting, the problems of repeated adjustment component position, clamping foot easy to loosen in traditional welding are solved, clamping confirmation time is greatly shortened, avoid rework, especially suitable for the automatic welding scene of multiple welding points, large size complex parts, significantly improve production rhythm and good product rate.

Description

Technical Field

[0001] This utility model relates to the field of welding tooling technology, specifically to an ultrasonic welding tooling for processing the central channel body assembly. Background Technology

[0002] The ultrasonic welding fixture for machining the central tunnel body assembly is a special equipment for automated welding of automotive central tunnel components. Its core design includes a multi-workpiece material transfer system, a detachable positioning and clamping module, and a welding head unit. The welding assembly uses a robotic arm to carry the ultrasonic welding head unit, which is suitable for complex components such as central tunnels that are large in size and have many welding points.

[0003] In the existing technology, when performing ultrasonic welding on the central tunnel assembly of an automobile, a lot of time is required to confirm the multiple components in the assembly due to the large number of positioning clips and corners before welding can be carried out. Furthermore, when picking them up, it is easy to make mistakes with the newly installed clips, which requires repeated confirmation, wasting a lot of time and affecting processing efficiency. Utility Model Content

[0004] Based on this, the purpose of this utility model is to provide an ultrasonic welding fixture for processing the central channel body assembly, so as to solve the technical problem that a lot of time needs to be spent on confirmation before processing before welding can be carried out, and that errors are easily made when the newly installed clamps are picked up, thus requiring repeated confirmation, wasting a lot of time and affecting processing efficiency.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an ultrasonic welding fixture for processing a central tunnel body assembly, comprising a mold base plate and a pad plate. The top of the mold base plate is fixedly connected to the pad plate via multiple sets of support plates. A first pressing mechanism is fixedly connected to the top of the pad plate, and a second pressing mechanism is fixedly connected to the top of one end of the pad plate. The first and second pressing mechanisms press against the outer surface of the central tunnel body. A third pressing mechanism is fixedly connected to one end of the mold base plate, and two sets of fourth pressing mechanisms are fixedly connected to the other end of the mold base plate. The mold base plate is fixedly connected to a first fixing mechanism and a second fixing mechanism at both ends, with the first fixing mechanism located on one side of the third pressing mechanism and the second fixing mechanism located between two sets of fourth pressing mechanisms. The top sides of the pad are fixedly connected to two sets of third fixing mechanisms and fourth fixing mechanisms, respectively. The mold base plate and the pad are fixedly connected to a first positioning support and a second positioning support. The top of the pad is fixedly connected to two sets of third positioning supports, which are located on both sides of the second pressing mechanism. The top end of the pad is fixedly connected to two sets of fourth positioning supports.

[0006] By adopting the above technical solution, this utility model utilizes the synergistic effect of multiple sets of positioning supports and pneumatic clamping mechanisms. Through the layered positioning structure on the mold base plate and pad, it achieves precise pre-positioning of each component of the central channel body. Combined with the multi-angle clamping system formed by the rotating cylinder driving connecting rod, movable rod, and pressure block, it can simultaneously complete the adaptive clamping of the component surface, interior, and both ends, effectively preventing displacement or misalignment caused by vibration during welding. The slide rail fixing mechanism equipped with the tooling further enhances the stability of the component. By controlling the fixed blocks to move in opposite directions through pneumatic sliders, it forms multi-point dynamic locking. This not only achieves rapid response and one-time precise positioning in the clamping process, but also ensures operational safety through external safety protection devices. It solves the problems of repeated adjustment of component positions and easy loosening of clamping feet in traditional welding, significantly shortens the clamping confirmation time, avoids rework, and is especially suitable for automated welding scenarios of multi-welding points and large-sized complex components, significantly improving production cycle and yield.

[0007] Furthermore, the first pressing mechanism includes a first pressing cylinder, a rotating rod, and two sets of first pressing blocks. The bottom of the first pressing cylinder is fixed to the top of the pad, and the top of the first pressing cylinder is rotatably connected to the rotating rod. Two sets of first pressing blocks are fixedly connected to the bottom of both ends of the rotating rod.

[0008] The second pressing mechanism includes a second pressing cylinder, a lifting block, multiple sets of connecting rods, and multiple sets of second pressing blocks. The top of the second pressing cylinder is fixedly connected to the lifting block, and the lifting block is fixedly connected to the multiple sets of connecting rods via a rotating shaft. The end of each set of connecting rods is rotatably connected to the second pressing block.

[0009] By adopting the above technical solution, the activation of the first pressing cylinder in the first pressing mechanism will cause the rotating rod to move up and down while rotating, thereby pressing the first pressing block against the central channel body. The activation of the second pressing mechanism will cause the second pressing cylinder to drive the lifting block to move up and down, thereby controlling the movement of multiple sets of connecting rods through the rotating shaft, thereby opening and closing multiple sets of second pressing blocks, and realizing the pressing of the internal components of the central channel body.

[0010] Furthermore, the third pressing mechanism includes a third pressing cylinder, a first movable rod, and a third pressing block. The top of the third pressing cylinder is rotatably connected to the first movable rod, and the bottom of one end of the first movable rod is fixedly connected to the third pressing block. The fourth pressing mechanism includes a fourth pressing cylinder, a second movable rod, and a fourth pressing block. The top of the fourth pressing cylinder is rotatably connected to the second movable rod, and the bottom of one end of the second movable rod is fixedly connected to the fourth pressing block.

[0011] By adopting the above technical solution, the third pressing mechanism is located at one end of the mold base plate. When the third pressing cylinder is activated, the first movable rod moves up and down while rotating, thereby pressing the third pressing block against one end of the central channel body. The two sets of fourth pressing mechanisms are located at the other end of the mold base plate. When the fourth pressing cylinder is activated, it drives the second movable rod to move up and down while rotating, thereby pressing the fourth pressing block against the other end of the central channel body.

[0012] Furthermore, the first fixing mechanism includes a first fixing cylinder and a first fixing block, with the telescopic end of the first fixing cylinder fixedly connected to the first fixing block; the second fixing mechanism includes a second fixing cylinder and a second fixing block, with the telescopic end of the second fixing cylinder fixedly connected to the second fixing block.

[0013] By adopting the above technical solution, the first fixing mechanism and the second fixing mechanism are located at both ends of the mold base plate, and the first fixing mechanism is located on one side of the third clamping mechanism. However, after the first fixing cylinder is started, it will drive the first fixing block to clamp the central channel body assembly. The second fixing mechanism is located in the middle of the two sets of fourth clamping mechanisms. When the second fixing cylinder is started, it will drive the second fixing block to clamp the central channel body. The first fixing block and the second fixing block move towards each other, thereby achieving the fixing of the central channel body.

[0014] Furthermore, the third fixing mechanism includes a third fixing cylinder, a first movable plate, a slider, a slide rail, and multiple sets of third fixing blocks. The top of the telescopic end of the third fixing cylinder is connected to the first movable plate, the bottom of the first movable plate is fixedly connected to two sets of sliders, the sliders are slidably connected to the slide rail fixed on the pad, and the multiple sets of third fixing blocks are fixedly connected to the top of the first movable plate.

[0015] The fourth fixing mechanism includes a fourth fixing cylinder, a second movable plate, and a fourth fixing block. The fourth fixing cylinder is fixedly connected to the top of the pad, and the telescopic end of the fourth fixing cylinder is fixedly connected to the second movable plate. The top of the second movable plate is fixedly connected to multiple sets of fourth fixing blocks.

[0016] By adopting the above technical solution, the third fixing mechanism is installed on both sides of one end of the pad. When the third fixing cylinder is started, it will drive the first movable plate to slide on the slide rail through the slider, thereby driving multiple sets of third fixing blocks to move and thus fixing the central channel body. Two sets of fourth fixing mechanisms are installed on both sides of the other end of the pad. After the fourth fixing cylinder is started, it will drive the second movable plate to control one end of the fourth fixing block, thereby fixing the central channel body.

[0017] Furthermore, two sets of positioning grooves are provided on one side of the top of the mold base plate, and multiple sets of left and right locking positioning blocks are provided on both sides of the mold base plate. Multiple sets of handles are fixedly connected to the top of the mold base plate.

[0018] By adopting the above technical solution, the entire tooling can be moved by the handle and fixed on the processing worktable by the positioning slot and the left and right locking positioning blocks, which facilitates the robotic arm to control the welding unit to weld the central channel body assembly.

[0019] In summary, this utility model has the following beneficial effects: By employing the synergistic effect of multiple sets of positioning supports and pneumatic clamping mechanisms, and through the layered positioning structure on the mold base plate and pad plate, this utility model achieves precise pre-positioning of the various components of the central channel body. Combined with the multi-angle clamping system formed by the rotating cylinder driving connecting rod, movable rod, and pressure block, it can simultaneously complete the adaptive clamping of the component surface, interior, and both ends, effectively preventing displacement or misalignment caused by vibration during welding. The slide rail fixing mechanism equipped with the tooling further enhances the stability of the component. By controlling the fixed blocks to move in opposite directions through the pneumatic slider, multi-point dynamic locking is formed. This not only achieves rapid response and one-time precise positioning in the clamping process, but also ensures operational safety through the external safety protection device. It solves the problems of repeated adjustment of component position and easy loosening of clamping feet in traditional welding, greatly shortens the clamping confirmation time, avoids rework, and is especially suitable for automated welding scenarios of multi-welding points and large-sized complex components, significantly improving production cycle and yield. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of some parts of this utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the first pressing mechanism of this utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the second pressing mechanism of this utility model;

[0024] Figure 5 This is a schematic diagram of the third pressing mechanism of this utility model;

[0025] Figure 6 This is a schematic diagram of the fourth pressing mechanism of this utility model;

[0026] Figure 7 This is a schematic diagram of the structure of the first fixing mechanism of this utility model;

[0027] Figure 8 This is a schematic diagram of the structure of the second fixing mechanism of this utility model;

[0028] Figure 9 This is a schematic diagram of the third fixing mechanism of this utility model;

[0029] Figure 10 This is a schematic diagram of the fourth fixing mechanism of this utility model.

[0030] In the diagram: 1. Mold base plate; 2. Pad plate; 3. First clamping mechanism; 301. First clamping cylinder; 302. Rotating rod; 303. First pressure block; 4. Second clamping mechanism; 401. Second clamping cylinder; 402. Lifting block; 403. Connecting rod; 404. Second pressure block; 5. Third clamping mechanism; 501. Third clamping cylinder; 502. First movable rod; 503. Third pressure block; 6. Fourth clamping mechanism; 601. Fourth clamping cylinder; 602. Second movable rod; 603. Fourth pressure block; 7. First fixing mechanism; 701. First fixing cylinder; 702. 8. First fixing block; 9. Second fixing mechanism; 10. Second fixing cylinder; 11. Second fixing block; 2. Second fixing block; 3. Third fixing mechanism; 4. Third fixing cylinder; 5. First movable plate; 6. Slider; 7. Slide rail; 8. Third fixing block; 9. Fourth fixing mechanism; 10. Fourth fixing cylinder; 11. Second fixing cylinder; 12. Second fixing plate; 13. Third fixing block; 14. Fourth fixing block; 15. Positioning groove; 16. Left and right locking positioning blocks; 17. Handle. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0032] The embodiments of this utility model will be described below based on its overall structure.

[0033] An ultrasonic welding fixture for machining the central tunnel body assembly, such as Figure 1-10 As shown, it includes a mold base plate 1 and a pad plate 2. The top of the mold base plate 1 is fixedly connected to the pad plate 2 through multiple sets of support plates. The mold base plate 1 and the pad plate 2 play a supporting and fixing role for each component of the central channel body.

[0034] Furthermore, a first pressing mechanism 3 is fixedly connected to the top of the pad 2, and a second pressing mechanism 4 is fixedly connected to the top of one end of the pad 2. The first pressing mechanism 3 and the second pressing mechanism 4 press against the outer surface of the central channel body. A third pressing mechanism 5 is fixedly connected to one end of the mold base plate 1, and two sets of fourth pressing mechanisms 6 are fixedly connected to the other end of the mold base plate 1. A first fixing mechanism 7 and a second fixing mechanism 8 are fixedly connected to both ends of the mold base plate 1, and the first fixing mechanism 7 is located on one side of the third pressing mechanism 5, and the second fixing mechanism 8 is located between the two sets of fourth pressing mechanisms 6. Two sets of third fixing mechanisms 9 and fourth fixing mechanisms 10 are fixedly connected to the top sides of the pad 2, respectively. By activating multiple pressing mechanisms and fixing mechanisms, various components can be clamped and fixed.

[0035] Furthermore, a first positioning support 11 and a second positioning support 12 are fixedly connected between the mold base plate 1 and the pad plate 2. Two sets of third positioning supports 13 are fixedly connected to the top of the pad plate 2, and the two sets of third positioning supports 13 are located on both sides of the second pressing mechanism 4. Two sets of fourth positioning supports 14 are fixedly connected to one end of the top of the pad plate 2. Multiple components of the central channel body can be placed on the mold base plate 1 and the pad plate 2. The mold base plate 1 is equipped with the first positioning support 11 and the second positioning support 12, while the pad plate 2 is equipped with the third positioning support 13 and the fourth positioning support 14. Multiple components of the central channel body are placed on each positioning support, thereby determining their position.

[0036] In the example, the first pressing mechanism 3 includes a first pressing cylinder 301, a rotating rod 302, and two sets of first pressing blocks 303. The bottom of the first pressing cylinder 301 is fixed to the top of the pad 2. The top of the first pressing cylinder 301 is rotatably connected to the rotating rod 302. Two sets of first pressing blocks 303 are fixedly connected to the bottom of both ends of the rotating rod 302. The second pressing mechanism 4 includes a second pressing cylinder 401, a lifting block 402, multiple sets of connecting rods 403, and multiple sets of second pressing blocks 404. The top of the second pressing cylinder 401 is fixedly connected to the lifting block 402. The lifting block 402 is fixedly connected to multiple sets of connecting rods 403 through a rotating shaft. The end of each set of connecting rods 403 is rotatably connected to the second pressing block 404.

[0037] When the first pressing mechanism 3 is activated, the first pressing cylinder 301 will cause the rotating rod 302 to move up and down and rotate at the same time, so that the first pressing block 303 can press the central channel body. When the second pressing mechanism 4 is activated, the second pressing cylinder 401 will drive the lifting block 402 to move up and down, thereby controlling the movement of multiple sets of connecting rods 403 through the rotating shaft, which in turn can cause multiple sets of second pressing blocks 404 to open and close, thereby pressing the internal components of the central channel body.

[0038] In the example, the third pressing mechanism 5 includes a third pressing cylinder 501, a first movable rod 502 and a third pressing block 503. The top of the third pressing cylinder 501 is rotatably connected to the first movable rod 502, and the bottom of one end of the first movable rod 502 is fixedly connected to the third pressing block 503. The fourth pressing mechanism 6 includes a fourth pressing cylinder 601, a second movable rod 602 and a fourth pressing block 603. The top of the fourth pressing cylinder 601 is rotatably connected to the second movable rod 602, and the bottom of one end of the second movable rod 602 is fixedly connected to the fourth pressing block 603.

[0039] The third pressing mechanism 5 is located at one end of the mold base plate 1. When the third pressing cylinder 501 is activated, the first movable rod 502 moves up and down and rotates at the same time, thereby pressing the third pressing block 503 against one end of the central channel body. The two sets of fourth pressing mechanisms 6 are located at the other end of the mold base plate 1. When the fourth pressing cylinder 601 is activated, the second movable rod 602 moves up and down and rotates at the same time, thereby pressing the fourth pressing block 603 against the other end of the central channel body.

[0040] In the example, the first fixing mechanism 7 includes a first fixing cylinder 701 and a first fixing block 702, with the telescopic end of the first fixing cylinder 701 fixedly connected to the first fixing block 702; the second fixing mechanism 8 includes a second fixing cylinder 801 and a second fixing block 802, with the telescopic end of the second fixing cylinder 801 fixedly connected to the second fixing block 802.

[0041] The first fixing mechanism 7 and the second fixing mechanism 8 are located at the two ends of the mold base plate 1, respectively. The first fixing mechanism 7 is located on one side of the third clamping mechanism 5. However, after the first fixing cylinder 701 is started, it will drive the first fixing block 702 to clamp the central channel body assembly. The second fixing mechanism 8 is located in the middle of the two sets of fourth clamping mechanisms 6. When the second fixing cylinder 801 is started, it will drive the second fixing block 802 to clamp the central channel body. The first fixing block 702 and the second fixing block 802 move towards each other, thereby achieving the fixing of the central channel body.

[0042] In the example, the third fixing mechanism 9 includes a third fixing cylinder 901, a first movable plate 902, a slider 903, a slide rail 904, and multiple sets of third fixing blocks 905. The top of the telescopic end of the third fixing cylinder 901 is fixedly connected to the first movable plate 902, the bottom of the first movable plate 902 is fixedly connected to two sets of sliders 903, the sliders 903 are slidably connected to the slide rail 904 fixed on the pad 2, and multiple sets of third fixing blocks 905 are fixedly connected to the top of the first movable plate 902. The fourth fixing mechanism 10 includes a fourth fixing cylinder 1001, a second movable plate 1002, and a fourth fixing block 1003. The fourth fixing cylinder 1001 is fixedly connected to the top of the pad 2, the telescopic end of the fourth fixing cylinder 1001 is fixedly connected to the second movable plate 1002, and the top of the second movable plate 1002 is fixedly connected to multiple sets of fourth fixing blocks 1003.

[0043] The third fixing mechanism 9 is installed on both sides of one end of the pad plate 2. When the third fixing cylinder 901 is activated, it will drive the first movable plate 902 to slide on the slide rail 904 through the slider 903, thereby driving multiple sets of third fixing blocks 905 to move and thus fixing the central channel body. The two sets of fourth fixing mechanisms 10 are installed on both sides of the other end of the pad plate 2. After the fourth fixing cylinder 1001 is activated, it will drive the second movable plate 1002 to control one end of the fourth fixing block 1003, thereby fixing the central channel body.

[0044] In the example, two sets of positioning grooves 15 are provided on one side of the top of the mold base plate 1, and multiple sets of left and right locking positioning blocks 16 are provided on both sides of the mold base plate 1. Multiple sets of handles 17 are fixedly connected to the top of the mold base plate 1. The entire tooling can be moved by the handles 17, and can be fixed on the processing worktable by the positioning grooves 15 and the left and right locking positioning blocks 16, so as to facilitate the robotic arm to control the welding unit to weld the central channel body assembly.

[0045] The working principle of this utility model is as follows: When in use, the entire tooling can be moved by the handle 17, and it can be fixed on the processing worktable by the positioning groove 15 and the left and right locking positioning blocks 16, so that the robotic arm can control the welding unit to weld the central channel body assembly.

[0046] After the mold is fixed, multiple components of the central channel body can be placed on the mold base plate 1 and the pad plate 2. The mold base plate 1 is equipped with the first positioning support 11 and the second positioning support 12, while the pad plate 2 is equipped with the third positioning support 13 and the fourth positioning support 14. The multiple components of the central channel body are placed on each positioning support, thereby determining their position.

[0047] At this time, by activating multiple sets of clamping and fixing mechanisms, each component can be clamped and fixed. The activation of the first clamping cylinder 301 in the first clamping mechanism 3 will cause the rotating rod 302 to move up and down while rotating, thereby allowing the first pressing block 303 to clamp the central channel body.

[0048] When the second pressing mechanism 4 is activated, the second pressing cylinder 401 drives the lifting block 402 to move up and down, thereby controlling the movement of multiple sets of connecting rods 403 through the rotating shaft, which in turn allows multiple sets of second pressing blocks 404 to open and close, thereby pressing the internal components of the central channel body.

[0049] The third pressing mechanism 5 is located at one end of the mold base plate 1. When the third pressing cylinder 501 is activated, the first movable rod 502 moves up and down and rotates at the same time, so that the third pressing block 503 presses one end of the central channel body. The two sets of fourth pressing mechanisms 6 are located at the other end of the mold base plate 1. When the fourth pressing cylinder 601 is activated, the second movable rod 602 moves up and down and rotates at the same time, so that the fourth pressing block 603 presses the other end of the central channel body.

[0050] While multiple sets of clamping mechanisms are clamping the central channel body, multiple sets of fixing mechanisms are also working. The first fixing mechanism 7 and the second fixing mechanism 8 are located at both ends of the mold base plate 1, and the first fixing mechanism 7 is located on one side of the third clamping mechanism 5. However, after the first fixing cylinder 701 is started, it will drive the first fixing block 702 to clamp the central channel body assembly.

[0051] The second fixing mechanism 8 is located between the two sets of fourth pressing mechanisms 6. When the second fixing cylinder 801 is activated, it will drive the second fixing block 802 to clamp the central channel body. The first fixing block 702 and the second fixing block 802 move towards each other, thereby fixing the central channel body.

[0052] Two sets of third fixing mechanisms 9 are installed on both sides of one end of the pad plate 2. When the third fixing cylinder 901 is started, it will drive the first movable plate 902 to slide on the slide rail 904 through the slider 903, thereby driving multiple sets of third fixing blocks 905 to move, and thus fixing the central channel body.

[0053] Two sets of fourth fixing mechanisms 10 are installed on both sides of the other end of the pad 2. After the fourth fixing cylinder 1001 is started, it will drive the second movable plate 1002 to control one end of the fourth fixing block 1003, thereby fixing the central channel body.

[0054] Multiple clamping and fixing mechanisms pneumatically fix each component of the central channel body, enabling rapid clamping and fixing of each component. In addition, multiple positioning supports can determine the position of each component, ensuring that each component will not move easily and avoiding misalignment of each component during clamping and fixing.

[0055] Meanwhile, safety measures are also installed on the outside of the mold base plate to ensure that the operator will not be injured when the robotic arm welds the central channel body assembly.

[0056] The above structure solves the technical problems of requiring a lot of time to confirm before welding, and the ease with which newly installed clips can be misaligned during handling, necessitating repeated confirmations, wasting a lot of time, and affecting processing efficiency.

[0057] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. An ultrasonic welding fixture for processing a central tunnel body assembly, comprising a mold base plate (1) and a pad plate (2), characterized in that: The top of the mold base plate (1) is fixedly connected to the pad plate (2) through multiple sets of support plates. The top of the pad plate (2) is fixedly connected to a first pressing mechanism (3). The top of one end of the pad plate (2) is fixedly connected to a second pressing mechanism (4). The first pressing mechanism (3) and the second pressing mechanism (4) press the outer surface of the central channel body. The bottom of the mold base plate (1) is fixedly connected to a third pressing mechanism (5). The other end of the mold base plate (1) is fixedly connected to two sets of fourth pressing mechanisms (6). The two ends of the mold base plate (1) are respectively fixedly connected to a first fixing mechanism (7) and a second fixing mechanism (8). The first fixing mechanism (7) is located on one side of the third pressing mechanism (5), and the second fixing mechanism (8) is located between the two sets of fourth pressing mechanisms (6). The top two sides of the pad plate (2) are respectively fixedly connected to two sets of third fixing mechanisms (9) and fourth fixing mechanisms (10). The mold base plate (1) and the pad plate (2) are fixedly connected by a first positioning support (11) and a second positioning support (12). The top of the pad plate (2) is fixedly connected by two sets of third positioning supports (13), and the two sets of third positioning supports (13) are located on both sides of the second pressing mechanism (4). The top end of the pad plate (2) is fixedly connected by two sets of fourth positioning supports (14).

2. The ultrasonic welding fixture for processing the central tunnel body assembly according to claim 1, characterized in that: The first pressing mechanism (3) includes a first pressing cylinder (301), a rotating rod (302) and two sets of first pressing blocks (303). The bottom of the first pressing cylinder (301) is fixed to the top of the pad (2). The top of the first pressing cylinder (301) is rotatably connected to the rotating rod (302). Two sets of first pressing blocks (303) are fixedly connected to the bottom of both ends of the rotating rod (302).

3. The ultrasonic welding fixture for processing the central tunnel body assembly according to claim 1, characterized in that: The second pressing mechanism (4) includes a second pressing cylinder (401), a lifting block (402), multiple sets of connecting rods (403) and multiple sets of second pressing blocks (404). The top of the second pressing cylinder (401) is fixedly connected to the lifting block (402). The lifting block (402) is fixedly connected to the multiple sets of connecting rods (403) through a rotating shaft. The end of each set of connecting rods (403) is rotatably connected to the second pressing block (404).

4. The ultrasonic welding fixture for machining the central tunnel body assembly according to claim 1, characterized in that: The third pressing mechanism (5) includes a third pressing cylinder (501), a first movable rod (502) and a third pressing block (503). The top of the third pressing cylinder (501) is rotatably connected to the first movable rod (502), and the bottom of one end of the first movable rod (502) is fixedly connected to the third pressing block (503).

5. The ultrasonic welding fixture for machining the central tunnel body assembly according to claim 1, characterized in that: The fourth pressing mechanism (6) includes a fourth pressing cylinder (601), a second movable rod (602) and a fourth pressing block (603). The top of the fourth pressing cylinder (601) is rotatably connected to the second movable rod (602), and the bottom of one end of the second movable rod (602) is fixedly connected to the fourth pressing block (603).

6. The ultrasonic welding fixture for machining the central tunnel body assembly according to claim 1, characterized in that: The first fixing mechanism (7) includes a first fixing cylinder (701) and a first fixing block (702), and the telescopic end of the first fixing cylinder (701) is fixedly connected to the first fixing block (702).

7. The ultrasonic welding fixture for machining the central tunnel body assembly according to claim 1, characterized in that: The second fixing mechanism (8) includes a second fixing cylinder (801) and a second fixing block (802), wherein the telescopic end of the second fixing cylinder (801) is fixedly connected to the second fixing block (802).

8. The ultrasonic welding fixture for machining the central tunnel body assembly according to claim 1, characterized in that: The third fixing mechanism (9) includes a third fixing cylinder (901), a first movable plate (902), a slider (903), a slide rail (904), and multiple sets of third fixing blocks (905). The top of the telescopic end of the third fixing cylinder (901) is connected to the first movable plate (902). The bottom of the first movable plate (902) is fixedly connected to two sets of sliders (903). The sliders (903) are slidably connected to the slide rail (904) fixed on the pad (2). Multiple sets of third fixing blocks (905) are fixedly connected to the top of the first movable plate (902).

9. The ultrasonic welding fixture for machining the central tunnel body assembly according to claim 1, characterized in that: The fourth fixing mechanism (10) includes a fourth fixing cylinder (1001), a second movable plate (1002), and a fourth fixing block (1003). The fourth fixing cylinder (1001) is fixedly connected to the top of the pad (2). The telescopic end of the fourth fixing cylinder (1001) is fixedly connected to the second movable plate (1002). The top of the second movable plate (1002) is fixedly connected to multiple sets of fourth fixing blocks (1003).

10. The ultrasonic welding fixture for machining the central tunnel body assembly according to claim 1, characterized in that: The mold base plate (1) has two sets of positioning grooves (15) on one side of the top, and multiple sets of left and right locking positioning blocks (16) are provided on both sides of the mold base plate (1). Multiple sets of handles (17) are fixedly connected to the top of the mold base plate (1).

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