A steering tie rod ball pin riveting forming device and process for engineering machinery vehicle

Abstract

The application discloses an engineering machinery vehicle steering pull rod ball pin riveting forming device and process, belongs to the steering pull rod ball pin riveting forming technical field, and includes: a workpiece fixed locking mechanism which is used for locking a workpiece main body; a connecting mechanism which is connected on a power equipment, and the connecting mechanism and the workpiece fixed locking mechanism are coaxially arranged; a center jacking mechanism which is slidingly connected in the inside of the connecting mechanism and is used for jacking a workpiece end cover, and the center jacking mechanism and the workpiece fixed locking mechanism are coaxially arranged; the riveting mechanism is rotated around the center, the hydraulic mechanism is matched for axial synchronous feeding, local and continuous circumferential rolling is carried out on the workpiece closing part, material gradually flows inwards in plasticity, closing and riveting are completed, the deformation amount of the continuous local deformation process is much smaller than that of stamping, and the relative slip between crystal lattices only occurs in a fixed area during each deformation.

Description

Technical Field

[0001] This invention belongs to the field of steering tie rod ball pin riveting forming technology, and particularly relates to a device and process for riveting ball pins of steering tie rods for engineering machinery vehicles. Background Technology

[0002] Ball joint assemblies should possess sufficient strength, rigidity, and service life. However, the ball joint finishing process, a crucial step in the assembly manufacturing process, is currently traditionally achieved through stamping. This process has inherent defects and drawbacks, primarily as follows: 1. Unstable finishing quality: Since stamping involves the instantaneous pressure and impact forming of parts, uncontrollable factors such as excessive or insufficient pressure and instantaneous material deformation during the process can lead to uneven finishing deformation, unstable shape, and even fatal defects such as cracks and crushing. The finishing quality cannot be guaranteed, the scrap rate is high, and the appearance is unsatisfactory. 2. High production difficulty and low efficiency: The stamping process is complicated to prepare, and the equipment needs to be repeatedly adjusted to achieve the required accuracy and deformation. In addition, each processing operation requires auxiliary operations such as positioning, oiling, pre-pressing, clamping, inspection and disassembly, which increases auxiliary time and personnel, and reduces production efficiency. 3. Stamping consumes a lot of energy, generates a lot of noise, and has poor safety. Summary of the Invention

[0003] The purpose of this invention is to provide a ball pin riveting forming device and process for steering tie rods of engineering machinery vehicles in order to solve the above-mentioned problems.

[0004] On the one hand, in order to achieve the above objectives, the present invention adopts the following technical solution: a ball pin riveting forming device for steering tie rods of engineering machinery vehicles, comprising: A workpiece fixing and locking mechanism is used to lock the workpiece body; A connecting mechanism is connected to a power device, and the connecting mechanism is arranged coaxially with the workpiece fixing and locking mechanism; A central clamping mechanism is slidably connected inside the connecting mechanism and used to clamp the workpiece end cap, and the central clamping mechanism is coaxially arranged with the workpiece fixing and locking mechanism. Two sets of riveting mechanisms are symmetrically arranged and connected to the connecting mechanism. The two sets of riveting mechanisms perform spin riveting on the workpiece end cap when the connecting mechanism is raised, lowered and rotated. The two sets of riveting mechanisms are located on opposite sides of the central clamping mechanism and are located between the connecting mechanism and the workpiece fixing and locking mechanism.

[0005] As a further description of the above technical solution: The workpiece fixing and locking mechanism includes a positioning base, a locking shaft, and two limiting sleeves. The positioning base is a rotating structure with a conical hole at its top. The axis of the conical hole coincides with the axis of the positioning base. The locking shaft is fixedly connected to the positioning base, and its axis is perpendicular to the axis of the positioning base. The two limiting sleeves are symmetrically arranged and slidably connected to the locking shaft. A positioning hole is provided at the top edge of each limiting sleeve, and the positioning hole is located above the conical hole.

[0006] As a further description of the above technical solution: The tapered hole is located between the positioning hole and the locking shaft.

[0007] As a further description of the above technical solution: The connecting mechanism includes a connecting flange, a chuck, a connecting block, and a mold mounting frame, all of which are rotating structures with their axes coinciding. The connecting flange, the chuck, the connecting block, and the mold mounting frame are sequentially fixedly connected. The axis of the connecting flange coincides with the axis of the positioning base, and the mold mounting frame is located between the connecting flange and the positioning base.

[0008] As a further description of the above technical solution: The central clamping mechanism includes a central clamping shaft, a positioning guide sleeve, a thrust ball bearing, and a limiting spring. The positioning guide sleeve is fixedly connected inside the chuck, and the axis of the positioning guide sleeve coincides with the axis of the positioning base. The central clamping shaft is slidably connected inside the connecting flange and the positioning guide sleeve. The thrust ball bearing is fixedly connected to the connecting flange. The limiting spring is sleeved on the central clamping shaft, and the opposite ends of the limiting spring abut against the step of the central clamping shaft and the thrust ball bearing, respectively.

[0009] As a further description of the above technical solution: The riveting mechanism includes a rotating shaft and a mold body. The rotating shaft is connected to the mold mounting frame through multiple bearings. The axis of the rotating shaft is perpendicular to the axis of the positioning base. The mold body is a rotating structure and is fixedly connected to the rotating shaft.

[0010] As a further description of the above technical solution: The rotating shaft passes through the mold mounting frame. One end of the rotating shaft is fitted with a retaining ring, and the other end of the rotating shaft is fitted with a baffle and screwed with a locking nut. The locking nut abuts against the baffle, so that the baffle and the retaining ring firmly clamp the mold body and the mold mounting frame.

[0011] On the other hand, in order to achieve the above objectives, the present invention employs the following method: a process for riveting and forming ball pins of steering tie rods for engineering machinery vehicles, comprising the following steps: 1) Push the two limiting sleeves to slide along the locking shaft, adjust the distance between the two positioning holes, insert the main body of the steering tie rod ball pin into the tapered hole, the tapered hole adapts to the main body contour of the steering tie rod ball pin and completes the initial limiting, push the limiting sleeves to reset, the positioning hole adapts to the contour of the steering tie rod ball pin, and the edge of the positioning hole is inserted into the edge groove of the steering tie rod ball pin, providing double support positioning; 2) The hydraulic system pushes the connecting flange downward, and the thrust ball bearing and the center clamping shaft move downward together along the positioning guide sleeve. When the lower end of the center clamping shaft contacts the end cap of the steering tie rod ball pin, the center clamping shaft is subjected to the downward thrust of the hydraulic system, its own weight, the upward spring force of the end cap of the steering tie rod ball pin, and the upward spring force of the limit spring along the axial direction. The center clamping shaft is in force balance, clamps the end cap of the steering tie rod ball pin and remains stationary. 3) When the main spindle power is started, the mold mounting frame transmits power to the mold body. The two mold bodies rotate around the center and, in conjunction with the hydraulic system, perform axial synchronous feeding to continuously roll the workpiece's closing wall in a circular motion, causing the material to gradually flow inward in a plastic manner, thus completing the closing riveting. 4) After each mechanism is reset, push the limit sleeve outward to remove the finished steering tie rod ball pin from the tapered hole.

[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In this invention, the riveting mechanism rotates around the center and is axially fed synchronously by the hydraulic mechanism to perform local and continuous circumferential rolling on the workpiece's closing point, causing the material to gradually flow inward plastically, thus completing the closing and riveting. The deformation amount of the continuous local deformation process is much smaller than that of stamping, and each deformation is only a relative slip between lattices in a fixed area, rarely forming shear and dislocation. The pressure required for deformation is only 7%-10% of that of stamping, eliminating phenomena such as bulging, thickening, and cracking under strong pressure. After riveting, the metal elongation deformation direction is consistent, and a continuous fibrous flow perpendicular to the load direction is formed, and the metal structure is not damaged, thereby greatly improving the load-bearing capacity of the riveting surface.

[0013] 2. In this invention, the mold body adopts a rounded corner forming design, which is consistent with the shape of the closing part. Under the action of the mold, the metal is deformed evenly, resulting in good consistency and aesthetic appearance of the riveting.

[0014] 3. In this invention, the pre-pressing, positioning and riveting are completed in one work cycle through the central clamping mechanism of the riveting fixture design, without the need for secondary clamping, which is convenient and fast, requires fewer auxiliary personnel, saves time and greatly improves production efficiency.

[0015] 4. In this invention, the riveting mold adopts a split structure, which is suitable for multi-variety production mode. Only by changing the riveting mold, the requirements of riveting ball pin components of different specifications and models can be met. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a ball pin riveting forming device for steering tie rods of engineering machinery vehicles.

[0017] Figure 2 This is a reference diagram showing the usage status of a ball pin riveting forming device for steering tie rods in engineering machinery vehicles.

[0018] Figure 3 for Figure 2 A sectional view.

[0019] Figure 4 This is a cross-sectional view of the central clamping mechanism in a ball pin riveting forming device for steering tie rods of engineering machinery vehicles.

[0020] Figure 5 This is a cross-sectional view of the riveting mechanism in a ball pin riveting forming device for steering tie rods of engineering machinery vehicles.

[0021] Figure 6 This is a flowchart of a ball pin riveting forming process for a steering tie rod used in engineering machinery vehicles.

[0022] Legend: 1. Workpiece fixing and locking mechanism; 11. Positioning base; 12. Locking shaft; 13. Limit sleeve; 2. Connecting mechanism; 21. Connecting flange; 22. Chuck; 23. Connecting block; 24. Mold mounting frame; 3. Center clamping mechanism; 31. Center clamping shaft; 32. Positioning guide sleeve; 33. Thrust ball bearing; 34. Limit spring; 4. Riveting mechanism; 41. Rotating shaft; 42. Mold body; 5. Tapered hole; 6. Positioning hole; 7. Retaining ring; 8. Baffle; 9. Locking nut. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Please see Figure 1-6 This invention provides a technical solution: a ball pin riveting forming device for steering tie rods of engineering machinery vehicles, comprising: The workpiece fixing and locking mechanism 1 is used to lock the workpiece body; The connecting mechanism 2 is connected to the power equipment, and the connecting mechanism 2 is arranged coaxially with the workpiece fixing and locking mechanism 1; The central clamping mechanism 3 is slidably connected inside the connecting mechanism 2 and is used to clamp the workpiece end cap. The central clamping mechanism 3 is arranged coaxially with the workpiece fixing and locking mechanism 1. Two sets of riveting mechanisms 4 are symmetrically arranged and connected to the connecting mechanism 2. The two sets of riveting mechanisms 4 perform spin riveting on the workpiece end cap when the connecting mechanism 2 is raised, lowered and rotated. The two sets of riveting mechanisms 4 are located on opposite sides of the central clamping mechanism 3, and the two sets of riveting mechanisms 4 are located between the connecting mechanism 2 and the workpiece fixing and locking mechanism 1. The workpiece fixing and locking mechanism 1 includes a positioning base 11, a locking shaft 12, and two limiting sleeves 13. The positioning base 11 is a rotating body structure. A conical hole 5 is opened on the top of the positioning base 11. The axis of the conical hole 5 coincides with the axis of the positioning base 11. The locking shaft 12 is fixedly connected to the positioning base 11. The axis of the locking shaft 12 is perpendicular to the axis of the positioning base 11. The two limiting sleeves 13 are symmetrically arranged and slidably connected to the locking shaft 12. A positioning hole 6 is opened at the top edge of the limiting sleeve 13. The positioning hole 6 is located above the conical hole 5. Specifically, the positioning base 11 is the basic support of the entire mechanism, bearing the main force of the entire riveting fixture and ensuring the rigidity of the overall structure. The workpiece is placed in the tapered hole 5 of the positioning base 11, allowing the workpiece to fit with the fixture to the maximum extent, ensuring the coaxiality of the workpiece and the machining spindle. Two separate limiting sleeves 13 are clamped in the groove of the workpiece to fix it. Then, the locking shaft 12 is used to combine the two limiting sleeves 13 and the positioning base 11 together to prevent the workpiece from shifting during the riveting process. Mechanism features: The positioning base 11 adopts a tapered positioning structure with an automatic centering function, ensuring high coaxiality between the workpiece center and the machine spindle. At the same time, the tapered surface has a large contact area and a high coefficient of friction, which can provide reliable clamping force and prevent the workpiece from moving during processing. The limiting sleeves 13 not only restrict the up / down / forward / backward position of the workpiece, but also guide the movement of the locking shaft 12 to ensure the consistency of each locking action. The locking shaft 12 is a key component for performing the fastening action. Through its axial movement and tapered structure, it achieves rapid clamping and loosening of the workpiece.

[0025] The tapered hole 5 is located between the positioning hole 6 and the locking shaft 12; The connecting mechanism 2 includes a connecting flange 21, a chuck 22, a connecting block 23, and a mold mounting frame 24, all of which are rotating structures with their axes coincident. The connecting flange 21, the chuck 22, the connecting block 23, and the mold mounting frame 24 are sequentially fixedly connected. The axis of the connecting flange 21 coincides with the axis of the positioning base 11, and the mold mounting frame 24 is located between the connecting flange 21 and the positioning base 11. The central clamping mechanism 3 includes a central clamping shaft 31, a positioning guide sleeve 32, a thrust ball bearing 33, and a limiting spring 34. The positioning guide sleeve 32 is fixedly connected inside the chuck 22, and the axis of the positioning guide sleeve 32 coincides with the axis of the positioning base 11. The central clamping shaft 31 is slidably connected inside the connecting flange 21 and the positioning guide sleeve 32. The thrust ball bearing 33 is fixedly connected to the connecting flange 21. The limiting spring 34 is sleeved on the central clamping shaft 31, and the opposite ends of the limiting spring 34 abut against the step of the central clamping shaft 31 and the thrust ball bearing 33, respectively. Specifically, the thrust ball bearing 33 is mounted on the connecting flange 21 and the central clamping shaft 31. When the hydraulic system pushes the connecting plate downward, the thrust ball bearing 33 and the central clamping shaft 31 move downward together along the positioning guide sleeve 32. When the lower end of the central clamping shaft 31 contacts the ball pin end cap, the central clamping shaft 31 is subjected to the downward thrust F of the hydraulic system, its own weight G, the upward spring force FW (the spring force of the ball pin spring compressed to a specified deformation W) of the ball pin end cap (ball pin spring), and the upward spring force F1 of the limiting spring 34. Ignoring frictional resistance, when F + G = FW + F1, the central clamping shaft 31 is in force balance, clamping the pin end cap and remaining stationary. At this time, the riveting mechanism performs radial rotation and axial feed under the combined action of the main shaft and the hydraulic system, accurately riveting the converging part. The riveting mechanism 4 includes a rotating shaft 41 and a mold body 42. The rotating shaft 41 is connected to the mold mounting frame 24 through multiple bearings. The axis of the rotating shaft 41 is perpendicular to the axis of the positioning base 11. The mold body 42 is a rotating body structure and is fixedly connected to the rotating shaft 41. Specifically, two mold bodies 42 are press-fitted and fixed onto two rotating shafts 41, and four bearings are installed and fixed onto two mold mounting frames 24. The assembled rotating shafts 41 are then fixed onto the mold mounting frames 24 using retaining rings 7, baffles 8, and locking nuts 9. When the main shaft power is started, the mold mounting frames 24 transmit power to the riveting fixtures. The two mold bodies 42 rotate around the center, cooperating with the hydraulic mechanism for axial synchronous feeding, continuously circumferentially rolling the workpiece's closing wall, causing the material to gradually flow plastically inward, completing the closing riveting. The body 42 takes into account the riveting closing principle and the product closing shape and sealing requirements in terms of material selection, structure and cutting edge shape. It is made of bearing steel, which can withstand the pressing force required for the deformation of the workpiece closing part, and adapt to the working environment of continuous rotation and low-speed feeding. The die cutting edge adopts the R-arc contour design, so that the metal undergoes a small amount of continuous plastic deformation according to the cutting edge shape during the rolling process, and finally achieves the closing forming requirements. The die body 42 adopts a split structure, which is convenient for maintenance and replacement, and can also be used for serialized multi-variety production needs.

[0026] The rotating shaft 41 passes through the mold mounting bracket 24. One end of the rotating shaft 41 is fitted with a retaining ring 7, and the other end of the rotating shaft 41 is fitted with a baffle 8 and screwed with a locking nut 9. The locking nut 9 abuts against the baffle 8, so that the baffle 8 and the retaining ring 7 firmly clamp the mold body 42 and the mold mounting bracket 24.

[0027] Working principle: First, push the two limiting sleeves 13 to slide along the locking shaft 12, adjust the distance between the two positioning holes 6, and insert the main body of the steering tie rod ball pin into the tapered hole 5. The tapered hole 5 adapts to the contour of the main body of the steering tie rod ball pin and completes the initial limiting. Push the limiting sleeves 13 to reset, and the positioning hole 6 adapts to the contour of the steering tie rod ball pin. The edge of the positioning hole 6 is engaged in the edge groove of the steering tie rod ball pin, providing double support positioning. Second, the hydraulic system pushes the connecting flange 21 downward, and the thrust ball bearing 33 and the center clamping shaft 31 move downward together along the positioning guide sleeve 32. When the lower end of the center clamping shaft 31 contacts the end cap of the steering tie rod ball pin, it moves along the axial center. The clamping shaft 31 is subjected to the downward thrust of the hydraulic system, its own weight, the upward spring force of the end cap of the steering tie rod ball pin, and the upward spring force of the limiting spring 34. The central clamping shaft 31 is in equilibrium, clamping the end cap of the steering tie rod ball pin and keeping it stationary. Then, when the main shaft power is started, the mold mounting bracket 24 transmits power to the mold body 42. The two mold bodies 42 rotate around the center and cooperate with the hydraulic system to perform axial synchronous feeding, continuously circumferentially rolling the workpiece's closing wall, causing the material to gradually flow inward plastically, completing the closing riveting. Finally, after all mechanisms are reset, the limiting sleeve 13 is pushed outward, and the processed steering tie rod ball pin can be taken out from the tapered hole 5.

[0028] Example: S01: Push the two limiting sleeves 13 to slide along the locking shaft 12, adjust the distance between the two positioning holes 6, insert the main body of the steering tie rod ball pin into the tapered hole 5, the tapered hole 5 adapts to the main body contour of the steering tie rod ball pin and completes the initial limiting, push the limiting sleeves 13 to reset, the positioning hole 6 adapts to the contour of the steering tie rod ball pin, the edge of the positioning hole 6 is inserted into the edge groove of the steering tie rod ball pin, and double support positioning is achieved; S02: The hydraulic system pushes the connecting flange 21 downward, and the thrust ball bearing 33 and the center clamping shaft 31 move downward together along the positioning guide sleeve 32. When the lower end of the center clamping shaft 31 contacts the end cover of the steering tie rod ball pin, the center clamping shaft 31 is subjected to the downward thrust of the hydraulic system, its own weight, the upward spring force of the end cover of the steering tie rod ball pin, and the upward spring force of the limiting spring 34 along the axial direction. The center clamping shaft 31 is in force balance, clamps the end cover of the steering tie rod ball pin and remains stationary. S03: When the main spindle power is started, the mold mounting frame 24 transmits the power to the mold body 42. The two mold bodies 42 rotate around the center and cooperate with the hydraulic system to perform axial synchronous feeding, continuously circumferentially rolling the workpiece end wall, so that the material gradually flows inward plastically to complete the end riveting. S04: After each mechanism is reset, push the limit sleeve 13 outward to remove the ball pin of the steering tie rod after machining from the tapered hole 5.

[0029] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A device for riveting and forming ball pins of steering tie rods for engineering machinery vehicles, characterized in that: include: Workpiece fixing and locking mechanism (1), which is used to lock the workpiece body; A connecting mechanism (2) is connected to a power device, and the connecting mechanism (2) is coaxially arranged with the workpiece fixing and locking mechanism (1); A central clamping mechanism (3) is slidably connected inside the connecting mechanism (2) and used to clamp the workpiece end cap. The central clamping mechanism (3) is coaxially arranged with the workpiece fixing and locking mechanism (1). Two sets of riveting mechanisms (4) are symmetrically arranged and connected to the connecting mechanism (2). The two sets of riveting mechanisms (4) perform spin riveting on the workpiece end cap when the connecting mechanism (2) is raised, lowered and rotated. The two sets of riveting mechanisms (4) are located on opposite sides of the central tightening mechanism (3), and the two sets of riveting mechanisms (4) are located between the connecting mechanism (2) and the workpiece fixing and locking mechanism (1).

2. The ball pin riveting forming device for steering tie rods of engineering machinery vehicles according to claim 1, characterized in that, The workpiece fixing and locking mechanism (1) includes a positioning base (11), a locking shaft (12), and two limiting sleeves (13). The positioning base (11) is a rotating body structure. A conical hole (5) is opened on the top of the positioning base (11). The axis of the conical hole (5) coincides with the axis of the positioning base (11). The locking shaft (12) is fixedly connected to the positioning base (11). The axis of the locking shaft (12) is perpendicular to the axis of the positioning base (11). The two limiting sleeves (13) are symmetrically arranged and slidably connected to the locking shaft (12). A positioning hole (6) is opened at the top edge of the limiting sleeve (13). The positioning hole (6) is located above the conical hole (5).

3. The ball pin riveting forming device for steering tie rods of engineering machinery vehicles according to claim 2, characterized in that, The tapered hole (5) is located between the positioning hole (6) and the locking shaft (12).

4. The ball pin riveting forming device for steering tie rods of engineering machinery vehicles according to claim 3, characterized in that, The connecting mechanism (2) includes a connecting flange (21), a chuck (22), a connecting block (23), and a mold mounting bracket (24), all of which are rotating structures with their axes coincident. The connecting flange (21), the chuck (22), the connecting block (23), and the mold mounting bracket (24) are fixedly connected in sequence. The axis of the connecting flange (21) coincides with the axis of the positioning base (11). The mold mounting bracket (24) is located between the connecting flange (21) and the positioning base (11).

5. The ball pin riveting forming device for steering tie rods of engineering machinery vehicles according to claim 4, characterized in that, The central clamping mechanism (3) includes a central clamping shaft (31), a positioning guide sleeve (32), a thrust ball bearing (33), and a limiting spring (34). The positioning guide sleeve (32) is fixedly connected inside the chuck (22), and the axis of the positioning guide sleeve (32) coincides with the axis of the positioning base (11). The central clamping shaft (31) is slidably connected inside the connecting flange (21) and the positioning guide sleeve (32). The thrust ball bearing (33) is fixedly connected to the connecting flange (21). The limiting spring (34) is sleeved on the central clamping shaft (31), and the opposite ends of the limiting spring (34) abut against the step of the central clamping shaft (31) and the thrust ball bearing (33), respectively.

6. The ball pin riveting forming device for steering tie rods of engineering machinery vehicles according to claim 5, characterized in that, The riveting mechanism (4) includes a rotating shaft (41) and a mold body (42). The rotating shaft (41) is connected to the mold mounting frame (24) through multiple bearings. The axis of the rotating shaft (41) is perpendicular to the axis of the positioning base (11). The mold body (42) is a rotating body structure and is fixedly connected to the rotating shaft (41).

7. The ball pin riveting forming device for steering tie rods of engineering machinery vehicles according to claim 6, characterized in that, The rotating shaft (41) passes through the mold mounting frame (24). One end of the rotating shaft (41) is fitted with a retaining ring (7), and the other end of the rotating shaft (41) is fitted with a baffle (8) and screwed with a locking nut (9). The locking nut (9) abuts against the baffle (8), so that the baffle (8) and the retaining ring (7) firmly clamp the mold body (42) and the mold mounting frame (24).

8. A ball pin riveting forming process for steering tie rods of engineering machinery vehicles as described in any one of claims 1-7, characterized in that, Includes the following steps: 1) Push the two limiting sleeves to slide along the locking shaft, adjust the distance between the two positioning holes, insert the main body of the steering tie rod ball pin into the tapered hole, the tapered hole adapts to the main body contour of the steering tie rod ball pin and completes the initial limiting, push the limiting sleeves to reset, the positioning hole adapts to the contour of the steering tie rod ball pin, and the edge of the positioning hole is inserted into the edge groove of the steering tie rod ball pin, providing double support positioning; 2) The hydraulic system pushes the connecting flange downward, and the thrust ball bearing and the center clamping shaft move downward together along the positioning guide sleeve. When the lower end of the center clamping shaft contacts the end cap of the steering tie rod ball pin, the center clamping shaft is subjected to the downward thrust of the hydraulic system, its own weight, the upward spring force of the end cap of the steering tie rod ball pin, and the upward spring force of the limit spring along the axial direction. The center clamping shaft is in force balance, clamps the end cap of the steering tie rod ball pin and remains stationary. 3) When the main spindle power is started, the mold mounting frame transmits power to the mold body. The two mold bodies rotate around the center and, in conjunction with the hydraulic system, perform axial synchronous feeding to continuously roll the workpiece's closing wall in a circular motion, causing the material to gradually flow inward in a plastic manner, thus completing the closing riveting. 4) After each mechanism is reset, push the limit sleeve outward to remove the finished steering tie rod ball pin from the tapered hole.

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