Hydraulic direct drive six-head spin riveting sealing machine and sealing method thereof

Abstract

The application provides a hydraulic direct-drive six-head spin riveting sealing machine and a sealing method thereof. The hydraulic direct-drive six-head spin riveting sealing machine comprises a shock absorber positioning mechanism, a six-head tool bit mechanism, a lifting assembly and a servo lifting mechanism. The shock absorber positioning mechanism is arranged below the shock absorber and is used for clamping and positioning the shock absorber. The six-head tool bit mechanism is arranged above the shock absorber and on the lifting assembly. The lifting assembly is connected with the servo lifting mechanism. The servo lifting mechanism is used for driving the six-head tool bit mechanism to rotate and lift through the lifting assembly, so that the six-head tool bit mechanism moves to a working position for sealing the shock absorber. In the rotating process, the six-head tool bit mechanism completes the sealing work of the shock absorber by bending and flattening the shock absorber port through the inclined wheel set and the flat wheel set in the hydraulic driven tool bit assembly. The application separates the actions of the edge folding and the flattening in the sealing process, and the sealing quality is more stable, the sealing appearance is better, and more types of shock absorber products can be adapted.

Description

Technical Field

[0001] This application belongs to the field of automotive shock absorbers, specifically relating to a hydraulic direct-drive six-head riveting and sealing machine and its sealing method. Background Technology

[0002] Shock absorbers are crucial components for smooth vehicle operation. With the development of the automotive industry, shock absorbers are evolving from traditional passive suspension to active adaptive suspension. The sealing structure of shock absorbers is also changing from welded and threaded sealing to rolled and folded sealing. Currently, most rolling sealing machines on the market are three-head rolling sealing machines, but the three-head sealing structure carries the risk of fracturing the guide mechanism in the shock absorber. Summary of the Invention

[0003] To at least partially overcome the problems existing in the related technologies, this application provides a hydraulic direct-drive six-head riveting and sealing machine and its sealing method.

[0004] According to a first aspect of the embodiments of this application, this application provides a hydraulic direct-drive six-head riveting and sealing machine, which includes a shock absorber positioning mechanism, a six-head cutting head mechanism, a lifting assembly and a servo lifting mechanism; the shock absorber positioning mechanism is disposed below the shock absorber and is used to clamp and position the shock absorber.

[0005] The six-head cutter mechanism is located above the shock absorber and is mounted on the lifting assembly. The six-head cutter mechanism includes a connecting shaft, a cutter assembly, and an oil seal pressure rod. The cutter assembly includes a cutter disc, three inclined wheel groups, and three flat wheel groups. Along the circumference of the cutter disc, the inclined wheel groups and flat wheel groups are evenly spaced on the bottom surface of the cutter disc. The oil seal pressure rod is used to apply pressure to the oil seal at the top of the shock absorber.

[0006] The lifting assembly is connected to the servo lifting mechanism, which is used to drive the six-head cutter mechanism to move up and down through the lifting assembly, so as to move the six-head cutter mechanism to the working position when sealing the shock absorber.

[0007] The lifting assembly is used to drive the cutter head assembly to rotate. During the rotation of the cutter head assembly, the six-head cutter head mechanism hydraulically drives the inclined wheel group to bend the shock absorber opening. The six-head cutter head mechanism hydraulically drives the flat wheel group to flatten the bent shock absorber opening, so as to complete the sealing work of the shock absorber.

[0008] In the aforementioned hydraulic direct-drive six-head riveting and sealing machine, the shock absorber positioning mechanism includes a tooling base plate, a positioning base, and a clamping jaw; the positioning base is disposed on the tooling base plate and is used to position the shock absorber; the clamping jaw is located on one side of the positioning base and is disposed on the tooling base plate, and the clamping jaw is used to clamp the shock absorber.

[0009] Furthermore, a limiting groove is formed on the side wall of the positioning base along the direction from the top to the bottom. The limiting groove cooperates with the baffle provided on the side wall of the shock absorber to prevent the shock absorber from rotating in the positioning base.

[0010] Furthermore, a pressure sensor is provided at the bottom of the tooling base plate, which is used to detect the sealing force during the sealing process.

[0011] In the aforementioned hydraulic direct-drive six-head riveting and sealing machine, the six-head cutting head mechanism further includes an oil circuit slip ring; one end of the oil circuit slip ring is connected to the connecting shaft, and the other end is fixedly connected to the cutting head assembly; the oil circuit slip ring includes an outer ring and an inner ring, and a bearing and a skeleton oil seal are provided between the outer ring and the inner ring;

[0012] A central hydraulic cylinder is provided at the center line of the cutter head disc, and three side hydraulic cylinders are provided on its top surface.

[0013] The oil circuit slip ring has two oil inlets on its side wall. One of the oil inlets is connected to the intermediate oil cylinder through a first oil circuit channel inside the oil circuit slip ring, and the other oil inlet is connected to the side oil cylinder through a second oil circuit channel inside the oil circuit slip ring.

[0014] The intermediate piston shaft in the intermediate cylinder is connected to the swing lever, and the swing lever is connected to the inclined wheel assembly; the intermediate cylinder drives the inclined wheel assembly to move synchronously through the swing lever; one end of the flat wheel assembly is hinged to the cutter head disc, and can swing downward under the drive of the piston shaft in the side cylinder.

[0015] In the aforementioned hydraulic direct-drive six-head riveting and sealing machine, both the intermediate cylinder and the side cylinder are equipped with return springs, which are used to achieve resetting.

[0016] Furthermore, the lifting assembly includes a first mounting plate, a second mounting plate, an oil-sealed preload cylinder, a servo motor, and a crossed roller bearing;

[0017] The first mounting plate and the second mounting plate are arranged in parallel and are fixedly connected by connecting columns; four pairs of linear bearings are correspondingly arranged on the first mounting plate and the second mounting plate.

[0018] The oil seal preload cylinder is connected to the oil seal pressure rod;

[0019] The oil seal pressure rod in the six-head cutting head mechanism passes through the second mounting plate and is connected to the connecting shaft through the crossed roller bearing;

[0020] The servo motor is located on one side of the oil seal pressure rod and is mounted on the second mounting plate; the extension shaft of the servo motor meshes with the crossed roller bearing through a gear; the crossed roller bearing is connected to the cutter head assembly through the connecting shaft and the oil circuit slip ring.

[0021] Furthermore, the lifting assembly also includes an anti-rotation cylinder for clamping the oil seal rod radially along the oil seal rod to limit the rotation of the oil seal rod.

[0022] Furthermore, the servo lifting mechanism includes a servo cylinder, a servo base, a guide column, and a top plate; a servo cylinder is provided on both sides of the servo base, the piston rod of the servo cylinder is connected to the first mounting plate, and the servo cylinder is used to synchronously drive the cutter head assembly to move up and down.

[0023] The guide column passes through the linear bearings installed on the first and second mounting plates and connects to the top plate.

[0024] According to a second aspect of the embodiments of this application, this application provides a sealing method using a hydraulic direct-drive six-head riveting and sealing machine as described in any of the above claims, which includes the following steps:

[0025] Install the shock absorber on the shock absorber positioning mechanism;

[0026] The servo lifting mechanism moves downward to position the six-head cutting head mechanism in the working position;

[0027] The servo motor drives the cutter head assembly to rotate through gears and crossed roller bearings. During the rotation, the intermediate oil cylinder drives the swashplate group to squeeze the shock absorber opening towards the center through the swing lever, so that it forms a folded edge at a preset angle.

[0028] The servo motor drives the cutter head assembly to rotate through gears and crossed roller bearings. During the rotation, the side cylinder drives the flat wheel group to swing downwards until the flat wheel group flattens the shock absorber opening. After the pressure is maintained for a preset time, the servo lifting mechanism rises back to its original position, and the sealing work is completed.

[0029] According to the above specific embodiments of this application, at least the following beneficial effects are achieved: The hydraulic direct-drive six-head riveting and sealing machine provided by this application divides the sealing process of the shock absorber into two actions: bending and flattening. The lifting component drives the cutter head assembly to rotate. During the rotation, the six-head cutter head mechanism bends the shock absorber opening through the hydraulically driven inclined wheel group and flattens the bent shock absorber opening through the hydraulically driven flat wheel group. This application can make the sealing quality more stable and the sealing appearance better. At the same time, this application integrates the function of oil seal pre-compression, ensuring that the internal residual pre-tightening force of the shock absorber is sufficient after sealing, and can be compatible with more types of shock absorber products.

[0030] It should be understood that the above general description and the following specific embodiments are merely exemplary and illustrative, and do not limit the scope of the claims made in this application. Attached Figure Description

[0031] The accompanying drawings, which are part of the specification of this application, illustrate embodiments of the present application and are used together with the description of the specification to illustrate the principles of the present application.

[0032] Figure 1 This is a schematic diagram of the overall structure of a hydraulic direct-drive six-head riveting and sealing machine provided in an embodiment of this application.

[0033] Figure 2 This is a schematic diagram of the shock absorber positioning mechanism in a hydraulic direct-drive six-head riveting and sealing machine provided in an embodiment of this application.

[0034] Figure 3 A cross-sectional view of the shock absorber positioning mechanism in a hydraulic direct-drive six-head riveting and sealing machine provided in this application embodiment.

[0035] Figure 4 This is a schematic diagram of the six-head cutting head mechanism in a hydraulic direct-drive six-head riveting and sealing machine provided in an embodiment of this application.

[0036] Figure 5 This is a cross-sectional view of the six-head cutting head mechanism in a hydraulic direct-drive six-head riveting and sealing machine provided in an embodiment of this application.

[0037] Figure 6 This is a schematic diagram of the cutter head assembly in the six-head cutter head mechanism of a hydraulic direct-drive six-head riveting and sealing machine provided in an embodiment of this application.

[0038] Figure 7 This is a schematic diagram of the lifting assembly in a hydraulic direct-drive six-head riveting and sealing machine provided in an embodiment of this application.

[0039] Figure 8 This is a schematic diagram of the servo lifting mechanism in a hydraulic direct-drive six-head riveting and sealing machine provided in an embodiment of this application.

[0040] Explanation of reference numerals in the attached figures:

[0041] 1. Shock absorber positioning mechanism; 11. Tooling base plate; 12. Positioning base; 13. Gripper; 14. Pressure sensor;

[0042] 2. Six-head cutter head mechanism; 21. Connecting shaft; 22. Oil circuit slip ring; 221. Outer ring; 222. Inner ring; 223. Oil inlet; 224. Anti-rotation plate; 23. Cutter head assembly; 231. Cutter head disc; 232. Inclined wheel assembly; 233. Flat wheel assembly; 24. Oil seal pressure rod; 25. Bearing; 26. Skeleton oil seal; 27. Intermediate oil cylinder; 271. Intermediate piston shaft; 272. Swing lever; 273. Lip seal ring; 28. Side oil cylinder; 29. ​​Return spring;

[0043] 3. Lifting assembly; 31. First mounting plate; 32. Second mounting plate; 33. Oil seal preload cylinder; 34. Servo motor; 35. Cross roller bearing; 36. Connecting column; 37. Linear bearing; 38. Anti-rotation cylinder;

[0044] 4. Servo lifting mechanism; 41. Servo electric cylinder; 42. Servo base; 43. Guide column; 44. Top plate;

[0045] 10. Shock absorbers. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the spirit of the content disclosed in this application will be clearly explained below with reference to the accompanying drawings and detailed description. After understanding the embodiments of this application, any person skilled in the art can make changes and modifications based on the technology taught in this application without departing from the spirit and scope of this application.

[0047] The illustrative embodiments and descriptions provided in this application are for explaining the application, but are not intended to limit the application. Furthermore, elements / components using the same or similar reference numerals in the drawings and embodiments are used to represent the same or similar parts.

[0048] The terms “first,” “second,” etc., used in this document are not intended to specifically refer to order or sequence, nor are they used to limit this application; they are merely used to distinguish elements or operations described using the same technical terms.

[0049] The terms “include,” “including,” “have,” “contain,” etc., used in this article are all open-ended terms, meaning that they include but are not limited to.

[0050] The term "and / or" as used herein includes any or all of the things mentioned.

[0051] The term "multiple" in this article includes "two" and "more than two"; the term "multiple groups" in this article includes "two groups" and "more than two groups".

[0052] Certain terms used to describe this application will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the application.

[0053] The hydraulic direct-drive six-head riveting and sealing machine provided in this application has an overall vertical structure and can be integrated into the shock absorber 10 assembly line.

[0054] like Figure 1 As shown, the hydraulic direct-drive six-head riveting and sealing machine provided in this application includes a shock absorber positioning mechanism 1, a six-head cutting head mechanism 2, a lifting assembly 3, and a servo lifting mechanism 4. The shock absorber positioning mechanism 1 is located below the shock absorber 10 and is used to clamp and position the shock absorber 10. The six-head cutting head mechanism 2 is located above the shock absorber 10 and is mounted on the lifting assembly 3. The lifting assembly 3 is connected to the servo lifting mechanism 4, which drives the six-head cutting head mechanism 2 to rotate and lift via the lifting assembly 3, moving the six-head cutting head mechanism 2 to the working position for sealing the shock absorber 10. During rotation, the six-head cutting head mechanism 2 completes the sealing work of the shock absorber 10 by bending and flattening the opening of the shock absorber.

[0055] In a specific embodiment, such as Figure 2 and Figure 3 As shown, the shock absorber positioning mechanism 1 includes a tooling base plate 11, a positioning base 12, and a gripper 13. The positioning base 12 is mounted on the tooling base plate 11, specifically, the positioning base 12 is hinged to the tooling base plate 11. A gripper 13 is fixedly mounted on the tooling base plate 11 via a column on one side of the positioning base 12. The gripper 13 is used to clamp the shock absorber 10 at a preset height. After manual loading, the positioning base 12 and the gripper 13 together position the shock absorber 10.

[0056] In this embodiment, a limiting groove is formed on the side wall of the positioning base 12 along the direction from the top to the bottom. The limiting groove cooperates with the baffle provided on the side wall of the shock absorber 10 to prevent the shock absorber 10 from rotating in the positioning base 12, and further fixes the relative position of the shock absorber 10 and the positioning base 12.

[0057] A pressure sensor 14 is installed at the bottom of the tooling base plate 11. The pressure sensor 14 is used to detect the sealing force during the sealing process.

[0058] In a specific embodiment, such as Figures 4-6As shown, the six-head cutting mechanism 2 includes a connecting shaft 21, an oil passage slip ring 22, a cutting head assembly 23, and an oil seal pressure rod 24. The connecting shaft 21 is connected to one end of the oil passage slip ring 22 via a tapered surface fit, and the other end of the oil passage slip ring 22 is fixedly connected to the cutting head assembly 23. The oil passage slip ring 22 includes an outer ring 221 and an inner ring 222. A bearing 25 and a skeleton oil seal 26 are disposed between the outer ring 221 and the inner ring 222. The inner ring 222 rotates relative to the outer ring 221 via the bearing 25, and the skeleton oil seal 26 provides a seal between the outer ring 221 and the inner ring 222.

[0059] The cutter head assembly 23 includes a cutter head disc 231, three inclined wheel sets 232, and three flat wheel sets 233. The inclined wheel sets 232 and flat wheel sets 233 are evenly spaced on the bottom surface of the cutter head disc 231 along its circumference. A central hydraulic cylinder 27 is located at the center line of the cutter head disc 231, and three side hydraulic cylinders 28 are evenly spaced on its top surface.

[0060] One end of the oil seal pressure rod 24 is used to connect the lifting assembly 3, and the other end passes through the connecting shaft 21, the oil circuit slip ring 22 and the intermediate oil cylinder 27 in sequence, and then presses the oil seal on the top of the shock absorber 10 along the length direction.

[0061] Specifically, the damping rod of the shock absorber 10 extends into the oil seal pressure rod 24 from the opposite end of the oil seal pressure rod 24 connected to the lifting assembly 3. The opposite end of the oil seal pressure rod 24 connected to the lifting assembly 3 is used to apply pressure to the oil seal at the top of the shock absorber 10.

[0062] The slip ring 22 has two oil inlets 223 on its side wall. One oil inlet 223 is connected to the intermediate cylinder 27 through a first oil passage inside the slip ring 22, and is used to guide one line of hydraulic oil into the intermediate cylinder 27. The other oil inlet 223 is connected to the side cylinder 28 through a second oil passage inside the slip ring 22, and is used to guide another line of hydraulic oil into the side cylinder 28.

[0063] The intermediate piston shaft 271 in the intermediate cylinder 27 is simultaneously connected to three swing levers 272, which are connected to the slant wheel assembly 232. The intermediate cylinder 27 drives the three slant wheel assemblies 232 to move synchronously via the swing levers 272. Each slant wheel assembly 232, driven by the swing levers 272, retracts towards the center of the cutter head disc 231 to press the shock absorber opening inward, forming a folded edge at a preset angle. One end of the flat wheel assembly 233 is hinged to the cutter head disc 231 and can swing downward under the drive of the piston shaft in the side cylinder 28, facilitating adjustment of the flat wheel angle when flattening the folded edge of the shock absorber opening. Both the intermediate cylinder 27 and the side cylinder 28 are reset via internal return springs 29. A lip seal 273 is also provided in the intermediate cylinder 27 to prevent hydraulic oil leakage.

[0064] In this embodiment, an anti-rotation plate 224 is also provided on the outer wall of the oil circuit slip ring 22. The anti-rotation plate 224 is used to limit the rotation of the outer ring 221 in the oil circuit slip ring 22.

[0065] In one specific embodiment, the lifting assembly 3 includes a first mounting plate 31, a second mounting plate 32, an oil-sealed preload cylinder 33, a servo motor 34, and crossed roller bearings 35. The first mounting plate 31 and the second mounting plate 32 are arranged in parallel and fixedly connected by connecting columns 36. Four pairs of linear bearings 37 are correspondingly provided on the first mounting plate 31 and the second mounting plate 32 for guiding the lifting motion, making the lifting more stable.

[0066] The oil seal preload cylinder 33 is connected to the oil seal pressure rod 24. The oil seal preload cylinder 33 provides a constant pressure to the oil seal pressure rod 24 through a proportional pressure reducing valve. The oil seal pressure rod 24 is used to apply pressure to the oil seal at the top of the shock absorber 10.

[0067] The oil seal pressure rod 24 in the six-head cutting head mechanism 2 passes through the second mounting plate 32 and is connected to the connecting shaft 21 via a crossed roller bearing 35. The servo motor 34 is located on one side of the oil seal pressure rod 24 and is mounted on the second mounting plate 32. The outer ring of the crossed roller bearing 35 has gear teeth. The extended shaft of the servo motor 34 meshes with the crossed roller bearing 35 via gears. The crossed roller bearing 35 is connected to the cutting head assembly 23 via the connecting shaft 21 and the oil passage slip ring 23 to provide rotational power to the cutting head assembly 23. The crossed roller bearing 35 provides rotational support for the cutting head assembly 23 and withstands overturning moments during operation, while also serving as a gear for power transmission.

[0068] In this embodiment, the lifting assembly 3 also includes an anti-rotation cylinder 38, which is used to clamp the oil seal rod 24 radially to restrict the rotation of the oil seal rod 24 so that it can only move up and down.

[0069] In a specific embodiment, such as Figure 8 As shown, the servo lifting mechanism 4 includes a servo cylinder 41, a servo base 42, a guide column 43, and a top plate 44. Specifically, there are two servo cylinders 41, which are installed on both sides of the servo base 42. The piston rods of the servo cylinders 41 are connected to the first mounting plate 31. The servo cylinders 41 are used to synchronously drive the cutter head assembly 23 to move up and down.

[0070] Four guide columns 43 are provided, which extend from four pairs of linear bearings 37 provided on the first mounting plate 31 and the second mounting plate 32 and connect to the top plate 44. The guide columns 43 are used to provide stable guidance for the cutter head assembly 23. The top plate 44 makes the structure of the servo lifting mechanism 4 more stable.

[0071] The working process of the hydraulic direct-drive six-head riveting and sealing machine provided in this application is as follows:

[0072] S1. Manual loading: Install the shock absorber 10 onto the shock absorber positioning mechanism.

[0073] S2, the servo lifting mechanism 4 moves downward to position the six-head cutting head mechanism 2 in the working position.

[0074] S3, the intermediate cylinder 27 drives the swing lever 272 to push the inclined wheel assembly 232 towards the center of the shock absorber opening, forming a folded edge at a preset angle. The preset angle can be 45°.

[0075] S4, the servo motor 34 drives the cutter head assembly 23 to rotate through gears and crossed roller bearings 35. During the rotation, the side cylinder 28 drives the flat wheel group 233 to swing downward until the flat wheel group 233 flattens the shock absorber opening. After the pressure is held for a preset time, the servo lifting mechanism 4 rises back to its original position, and the sealing work is completed.

[0076] The hydraulic direct-drive six-head riveting and sealing machine provided in this application divides the sealing process of the shock absorber 10 into two actions: bending and flattening, resulting in more stable sealing quality and a better sealing appearance. Simultaneously, this application integrates an oil seal pre-compression function, ensuring sufficient residual pre-tightening force inside the shock absorber 10 after sealing, and enabling compatibility with a wider range of shock absorber 10 products.

[0077] The above description is merely an illustrative embodiment of this application. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of this application shall fall within the scope of protection of this application.

Claims

1. A hydraulic direct-drive six-head riveting and sealing machine, characterized in that, It includes a shock absorber positioning mechanism, a six-head cutting head mechanism, a lifting assembly, and a servo lifting mechanism; the shock absorber positioning mechanism is located below the shock absorber and is used to clamp and position the shock absorber. The six-head cutter mechanism is located above the shock absorber and is mounted on the lifting assembly. The six-head cutter mechanism includes a connecting shaft, a cutter assembly, and an oil seal pressure rod. The cutter assembly includes a cutter disc, three inclined wheel groups, and three flat wheel groups. Along the circumference of the cutter disc, the inclined wheel groups and flat wheel groups are evenly spaced on the bottom surface of the cutter disc. The oil seal pressure rod is used to apply pressure to the oil seal at the top of the shock absorber. The lifting assembly is connected to a servo lifting mechanism, which drives the six-head cutter mechanism to move up and down via the lifting assembly, thereby moving the six-head cutter mechanism to the working position when sealing the shock absorber. The lifting assembly includes a first mounting plate, a second mounting plate, a servo motor, and a crossed roller bearing. The oil seal pressure rod passes through the second mounting plate and is connected to the connecting shaft via the crossed roller bearing. The servo motor is mounted on the second mounting plate, and its extension shaft meshes with the crossed roller bearing via a gear. The crossed roller bearing drives the cutter assembly to rotate via the connecting shaft. The servo lifting mechanism includes two servo electric cylinders, which are connected to the lifting assembly and used to synchronously drive the cutter head assembly to move up and down. During the rotation of the cutter head assembly, the six-head cutter head mechanism hydraulically drives the inclined wheel group to bend the shock absorber opening, and the six-head cutter head mechanism hydraulically drives the flat wheel group to flatten the bent shock absorber opening, thereby completing the sealing work of the shock absorber.

2. The hydraulic direct-drive six-head riveting and sealing machine according to claim 1, characterized in that, The shock absorber positioning mechanism includes a tooling base plate, a positioning base, and a clamp; the positioning base is disposed on the tooling base plate and is used to position the shock absorber; the clamp is located on one side of the positioning base and is disposed on the tooling base plate, and the clamp is used to clamp the shock absorber.

3. The hydraulic direct-drive six-head riveting and sealing machine according to claim 2, characterized in that, A limiting groove is formed on the side wall of the positioning base from top to bottom. The limiting groove cooperates with the baffle provided on the side wall of the shock absorber to prevent the shock absorber from rotating in the positioning base.

4. The hydraulic direct-drive six-head riveting and sealing machine according to claim 2, characterized in that, A pressure sensor is installed at the bottom of the tooling base plate, and the pressure sensor is used to detect the sealing force during the sealing process.

5. The hydraulic direct-drive six-head riveting and sealing machine according to claim 1, characterized in that, The six-head cutting head mechanism also includes an oil passage slip ring; one end of the oil passage slip ring is connected to the connecting shaft, and the other end is fixedly connected to the cutting head assembly; the oil passage slip ring includes an outer ring and an inner ring, and a bearing and a skeleton oil seal are provided between the outer ring and the inner ring. A central hydraulic cylinder is provided at the center line of the cutter head disc, and three side hydraulic cylinders are provided on its top surface. The oil circuit slip ring has two oil inlets on its side wall. One of the oil inlets is connected to the intermediate oil cylinder through a first oil circuit channel inside the oil circuit slip ring, and the other oil inlet is connected to the side oil cylinder through a second oil circuit channel inside the oil circuit slip ring. The intermediate piston shaft in the intermediate cylinder is connected to the swing lever, and the swing lever is connected to the inclined wheel assembly; the intermediate cylinder drives the inclined wheel assembly to move synchronously through the swing lever; one end of the flat wheel assembly is hinged to the cutter head disc, and can swing downward under the drive of the piston shaft in the side cylinder.

6. The hydraulic direct-drive six-head riveting and sealing machine according to claim 5, characterized in that, Both the intermediate cylinder and the side cylinder are equipped with a return spring, which is used to achieve reset.

7. The hydraulic direct-drive six-head riveting and sealing machine according to claim 5, characterized in that, The lifting assembly also includes an oil-sealed pre-pressure cylinder; The first mounting plate and the second mounting plate are arranged in parallel and are fixedly connected by connecting columns; four pairs of linear bearings are correspondingly arranged on the first mounting plate and the second mounting plate. The oil seal preload cylinder is connected to the oil seal pressure rod; The servo motor is located on one side of the oil seal pressure rod.

8. The hydraulic direct-drive six-head riveting and sealing machine according to claim 7, characterized in that, The lifting assembly also includes an anti-rotation cylinder, which is used to clamp the oil seal rod radially to limit the rotation of the oil seal rod.

9. The hydraulic direct-drive six-head riveting and sealing machine according to claim 7, characterized in that, The servo lifting mechanism also includes a servo base, a guide column, and a top plate; a servo electric cylinder is provided on both sides of the servo base, and the piston rod of the servo electric cylinder is connected to the first mounting plate. The guide column passes through the linear bearings installed on the first and second mounting plates and connects to the top plate.

10. A sealing method using a hydraulic direct-drive six-head riveting and sealing machine as described in any one of claims 1 to 9, characterized in that, Includes the following steps: Install the shock absorber on the shock absorber positioning mechanism; The servo lifting mechanism moves downward to position the six-head cutting head mechanism in the working position; The intermediate cylinder drives the swing lever to push the inclined wheel group towards the middle of the shock absorber opening, so that it forms a folded edge at a preset angle; The servo motor drives the cutter head assembly to rotate through gears and crossed roller bearings. During the rotation, the side cylinder drives the flat wheel group to swing downwards until the flat wheel group flattens the shock absorber opening. After the pressure is maintained for a preset time, the servo lifting mechanism rises back to its original position, and the sealing work is completed.

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