Ball spinning forming device for integral outer ring self-lubricating spherical bearings

Abstract

This utility model discloses a ball bearing spinning forming device for an integral outer ring self-lubricating spherical plain bearing, relating to the field of bearing processing technology. The utility model includes a mounting base, a first bracket, a second bracket, and spinning balls. The first bracket is located at the upper end of the mounting base, and a lower support rail is located inside the lower end of the first bracket. A bottom support ball is rotatably mounted inside the lower support rail. The second bracket is located above the first bracket. The first and second brackets constitute the main structure of the spinning support assembly. An upper pressure rail is located at the upper end of the second bracket, and a top support ball is rotatably mounted inside the upper pressure rail. Spinning balls that rotatably fit and adhere to the bottom and top support balls are located inside the first and second brackets. This utility model, by setting spinning balls and using the spinning support assembly for rolling support, ensures uniform force and friction during the spinning of the outer ring, thus solving the problems of large surface contact wear and localized overheating leading to a decrease in the spinning quality of the outer ring.

Description

Technical Field

[0001] This utility model relates to the field of bearing processing technology, and in particular to a ball spin forming device for integral outer ring self-lubricating spherical bearings. Background Technology

[0002] Integral outer ring self-lubricating spherical plain bearings are a special type of sliding bearing with an integral outer ring. They achieve oil-free lubrication by embedding self-lubricating materials and are widely used in engineering machinery, aerospace, and other applications requiring wear resistance and low maintenance. Ball spinning forming equipment is a special plastic processing equipment designed specifically for the outer ring raceway of this type of bearing. Its core function is to process metal materials into high-precision, high-strength outer ring raceway structures through spinning, a metal plastic forming process, replacing traditional cutting machining to improve part performance and reduce material consumption.

[0003] Spinning is used to form the outer ring of a self-lubricating spherical plain bearing. The spun part is in direct contact with the outer ring. In traditional spinning processes, the spun part and the outer ring surface experience surface contact and sliding friction. This results in a large contact area and a long relative sliding distance, causing strong friction on the metal substrate of the outer ring, easily leading to surface scratches and precision deviations. Furthermore, frictional heat accelerates the wear of the spun part itself. The surface contact in traditional spinning causes frictional heat to concentrate in localized areas, resulting in high local temperatures. Since the outer ring material of integral outer ring self-lubricating spherical plain bearings is often bearing steel or high-strength alloy, localized high temperatures can easily cause thermal stress cracking and grain coarsening, damaging the mechanical properties of the outer ring. Therefore, those skilled in the art have provided a ball-spinning forming apparatus for integral outer ring self-lubricating spherical plain bearings to solve the problems mentioned in the background art. Utility Model Content

[0004] 1. Technical Solution

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model relates to a ball bearing spinning device for an integral outer ring self-lubricating spherical plain bearing, comprising a mounting base, a first bracket, a second bracket, and spinning balls. The upper end of the mounting base is provided with the first bracket arranged in a circular array. The lower end of the first bracket is provided with a lower support rail, and the lower support rail is rotatably mounted with bottom support balls arranged in a circular array. The second bracket is provided above the first bracket and is arranged in a circular array. The first bracket and the second bracket constitute the main structure of the spinning support assembly. The upper end of the second bracket is provided with an upper pressure rail, and the upper pressure rail is rotatably mounted with top support balls arranged in a circular array. The first bracket and the second bracket are provided with spinning balls that are rotatably fitted and mounted to the bottom support balls and the top support balls.

[0007] Furthermore, each of the brackets is provided with a mating plate at one end, and the mating plates are fixed together by bolts.

[0008] Specifically, bracket one and bracket two are fixed together by bolts, and the spun support assembly is fixed together.

[0009] Furthermore, the upper end of the mounting base is provided with docking plates two arranged in a ring array and spaced apart from the bracket one, and the outer wall of the upper pressure rail is provided with docking plates three arranged in a ring array and spaced apart from the bracket two. The docking plates two are provided with positioning holes, and the lower end of the docking plates three are provided with positioning blocks that are slidably installed inside the positioning holes.

[0010] Specifically, mating plate two and mating plate three are connected to the positioning holes through positioning blocks to provide positioning for bolt assembly.

[0011] Furthermore, the lower end of the mounting base is provided with mounting holes arranged in a ring array, and a retainer two is provided between each of the top support beads, and a retainer one is provided between each of the bottom support beads;

[0012] Specifically, the mounting hole is used to connect with a multi-degree-of-freedom feed device. The power structure of the multi-degree-of-freedom feed drives the rotating box of the mounting base to feed and perform spinning. The spacing between the top support beads and the bottom support beads is kept constant through the second cage.

[0013] Furthermore, a reinforcing ring 2 is welded to the outer wall of both the second bracket and the third docking plate, and a reinforcing ring 1 is welded between the first bracket and the second docking plate;

[0014] Specifically, the first reinforcing ring fixes the second docking plate and the first bracket together, and the second reinforcing ring fixes the third docking plate and the second bracket together, thereby improving the overall structural strength.

[0015] Furthermore, an annular box is provided on the inner wall of the bracket, and oil droplets arranged in a ring array are rolled on the inner wall of the annular box. An oil cavity is provided inside the annular box, and an oil hole is opened at the upper end of the annular box. A sealing plug is provided inside the oil hole.

[0016] Specifically, the ring box contains the lubricating medium, which is transferred to the spinning balls through the upper oil droplets. Under the rotation of the spinning balls, the lubricating medium is transferred to the top and bottom support balls to lubricate the rolling elements. The lubricating medium is injected into the ring box through the oil hole, and the oil hole is closed by the sealing plug.

[0017] 2. Beneficial effects

[0018] Compared with existing technologies, the advantages of this utility model are:

[0019] This invention employs a spun ball bearing that directly contacts the outer ring of a self-lubricating spherical bearing. The spun ball bearing itself is rotatably mounted on a spun bearing support assembly, which provides rotational support for the spun ball bearing. The spun ball bearing and the outer ring of the self-lubricating spherical bearing are pressed into contact. The spun bearing support assembly is mounted on a feeding device. By controlling the pressure applied by the ball bearing and the feeding path, the outer ring of the self-lubricating spherical bearing is rolled and pressed. The spun ball bearing applies a uniform spinning force to the outer ring of the self-lubricating spherical bearing at all points, reducing the friction of the spun part.

[0020] Meanwhile, the spinning process avoids severe localized overheating of the spun parts. The spinning balls convert sliding friction into rolling friction through their own rotation, reducing the coefficient of friction and the friction damage rate on the outer ring surface. This prevents damage to the substrate flatness of the self-lubricating material subsequently embedded in the outer ring. The ball bearings are stably rotated and supported by the spinning support assembly, resulting in uniform force distribution and dispersed wear. This significantly reduces the frequency of spun parts replacement and equipment maintenance costs. The spinning balls and the outer ring are in dynamic point contact, with the contact point constantly switching as the balls rotate. Frictional heat can be quickly dispersed to the entire outer ring, preventing localized overheating.

[0021] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a front-view three-dimensional structural diagram of the present invention;

[0024] Figure 2 This is a top-view three-dimensional structural diagram of the present invention;

[0025] Figure 3 This is a first-angle three-dimensional structural schematic diagram of the main cross-section of this utility model;

[0026] Figure 4 This is a schematic diagram of the three-dimensional structure of the present invention from a second angle, shown in a main sectional view.

[0027] Figure 5 This is a front-view three-dimensional structural diagram of the internal structure of the ring box of this utility model.

[0028] The attached diagram lists the components represented by each number as follows:

[0029] 1. Mounting base; 2. Bracket 1; 3. Reinforcing ring 1; 4. Bracket 2; 5. Reinforcing ring 2; 6. Spin-formed ball bearing; 7. Ring box; 8. Connecting plate 1; 9. Bolt; 10. Bottom support ball; 11. Top support ball; 12. Mounting hole; 13. Cage 1; 14. Cage 2; 15. Connecting plate 2; 16. Connecting plate 3; 17. Positioning block; 18. Positioning hole; 19. Oil hole; 20. Sealing plug; 21. Upper oil ball; 22. Oil cavity; 23. Upper pressure rail; 24. Lower support rail. Detailed Implementation

[0030] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0031] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0034] Example 1

[0035] Please see Figure 1-5 As shown, this embodiment is a ball spinning forming device for an integral outer ring self-lubricating spherical bearing, including a mounting base 1, a first bracket 2, a second bracket 4, and spinning balls 6. The upper end of the mounting base 1 is provided with a first bracket 2 arranged in a ring array. The lower end of the first bracket 2 is provided with a lower support rail 24. The lower support rail 24 is rolled with a bottom support ball 10 arranged in a ring array. The second bracket 4 is arranged in a ring array above the first bracket 2. The first bracket 2 and the second bracket 4 constitute the main structure of the spinning support assembly. The upper end of the second bracket 4 is provided with an upper pressure rail 23. The upper pressure rail 23 is rotatably installed with a top support ball 11 arranged in a ring array. The first bracket 2 and the second bracket 4 are provided with spinning balls 6 that are rolled and fitted with the bottom support ball 10 and the top support ball 11.

[0036] Each of the brackets 1-2 and 2-4 has a mating plate 8 at one end opposite to the other, and the mating plates 8 are fixed together by bolts 9.

[0037] The upper end of the mounting base 1 is provided with docking plates 15 arranged in a ring array and spaced apart from the bracket 2. The outer wall of the upper pressure rail 23 is provided with docking plates 16 arranged in a ring array and spaced apart from the bracket 4. The docking plates 15 are all provided with positioning holes 18. The lower end of the docking plates 16 is provided with positioning blocks 17 that are slidably installed inside the positioning holes 18.

[0038] The mounting base 1 has mounting holes 12 arranged in a ring array at the lower end of the interior. Each of the top support beads 11 is provided with a retainer 2 14, and each of the bottom support beads 10 is provided with a retainer 13.

[0039] Reinforcing rings 25 are welded to the outer walls of bracket 24 and docking plate 316, and reinforcing rings 3 are welded between bracket 12 and docking plate 215.

[0040] The inner wall of the bracket 12 is provided with an annular box 7. The inner wall of the annular box 7 is rolled with oil droplets 21 distributed in a ring array. The annular box 7 is provided with an oil cavity 22. The upper end of the annular box 7 is provided with an oil hole 19. The oil hole 19 is provided with a sealing plug 20.

[0041] Based on the implementation steps of Example 1: In the traditional spinning process, the rigid spinning wheel spinning part and the outer ring surface are in surface contact plus sliding friction. The contact area is large and the relative sliding distance is long. This not only causes strong friction on the metal substrate of the self-lubricating spherical bearing outer ring, which easily leads to scratches and precision deviations on the outer ring surface, but also accelerates the wear of the spinning part itself due to frictional heat. The improved method uses spinning spherical balls to make point contact with the outer ring plus rolling friction. When the spherical balls contact the outer ring, they convert sliding friction into rolling friction through their own rotation. The friction coefficient is reduced, the friction damage rate of the outer ring surface is reduced, and the flatness of the substrate of the outer ring subsequent inlay of self-lubricating material is avoided. The spinning balls 6 achieve stable rotation support through the spinning bracket assembly. The force is uniform and the wear is dispersed, which greatly reduces the replacement frequency of spinning parts and equipment maintenance costs.

[0042] Traditional spinning with surface contact can lead to the concentration of frictional heat in localized areas. However, the outer ring material of integral outer ring self-lubricating spherical bearings is mostly bearing steel or high-strength alloy. Localized high temperatures can easily cause problems such as thermal stress cracking and grain coarsening, which can damage the mechanical properties of the outer ring and reduce fatigue strength. The improved solution solves the heat concentration problem by using rolling contact of the balls and uniform pressure. The spinning balls 6 have dynamic point contact with the outer ring, and the contact points switch continuously as the balls rotate. Frictional heat can be quickly dispersed to the entire outer ring, avoiding local overheating. By controlling the pressure intensity and feed path of the balls, it is ensured that the stress and heat are uniform in all areas of the outer ring, the metallographic structure of the material is stable, and the hardness deviation of the outer ring after forming is reduced, providing a reliable matrix performance for subsequent self-lubricating material embedding.

[0043] The outer ring raceway of the integral outer ring self-lubricating spherical bearing needs to be precisely matched with the balls. Traditional spinning can easily lead to dimensional deviations and irregular contours in the raceway due to uneven friction and local deformation, requiring multiple grinding corrections. This not only increases process costs but also damages the material flow lines. The improved solution achieves high-precision forming through ball rolling extrusion and stable support. The spun balls 6 themselves have high-precision sphericity, and through the rigid support of the spinning bracket assembly, the raceway contour can be accurately replicated. The uniform pressure characteristics of each ball ensure consistent plastic flow of the raceway metal material. After forming, the dimensional accuracy of the raceway is improved, the curvature deviation is reduced, and the surface roughness is reduced.

[0044] Traditional spinning processes suffer from high sliding friction resistance, requiring higher power output from the equipment drive motor and resulting in high energy consumption. Additionally, frictional vibration generates operating noise, which does not meet the environmental protection requirements of the workshop. The improved solution achieves energy saving and noise reduction by reducing rolling friction resistance. Rolling friction resistance is relatively lower than sliding friction resistance, which can reduce the power of the equipment drive motor, reduce energy consumption per unit product, and ensure smooth rolling contact of the balls, reducing vibration amplitude and thus reducing operating noise, meeting the noise standards of green workshops and improving the working environment for operators.

[0045] Bolt 9 wrench, suitable for the bolt 9 specification of mating plate 8, extreme pressure lithium-based grease as the lubricant, suitable for metal rolling contact scenarios, multi-degree-of-freedom feed equipment using CNC spinning machine, must match the mounting hole 12 of mounting base 1, the outer ring blank of the integral outer ring type self-lubricating spherical plain bearing to be processed, the material is GCr15 bearing steel, the hardness after pretreatment is HB180-200, the surface oxide scale is removed, and it is sanded to Ra1.6μm to ensure that there is no extra wear caused by impurities when in contact with the spinning ball 6, and the bottom support ball 10 is installed one by one into the lower support rail 24 of bracket 2, ensuring that each bottom support ball 10 can roll freely along the rail wall, the retainer 13 is inserted into the gap between the bottom support ball 10, and the spacer structure of retainer 13 ensures that the spacing of the bottom support ball 10 is constant and avoids the bottom support ball 1 The 0 offset causes uneven force on the spinning ball 6. To solve the forming deviation problem caused by the unstable support of traditional spinning parts, the reinforcing ring 3 is welded to the connection between the bracket 2 and the docking plate 15. The docking plate 15 and the bracket 2 are distributed at intervals. The ring structure disperses the force on the bracket 2. After reinforcement, the radial stiffness of the bracket 2 is improved, preventing the bracket from deforming during spinning. Similarly, the top support ball 11 is installed in the upper pressure rail 23 of the bracket 4 and embedded in the retainer 14 at a fixed interval. The reinforcing ring 5 is welded to the connection between the bracket 4 and the docking plate 16 to improve the deformation resistance of the bracket 4. The reinforcing ring 3 and the reinforcing ring 5 connect the dispersed bracket 2 and bracket 4 and the docking plate into a whole through ring welding, avoiding the cracking of the bracket caused by spinning pressure and providing rigid support for the stable rolling of the spinning ball 6.

[0046] Attach bracket 24 above bracket 12, aligning the mating plates 18 of bracket 12 and bracket 24. Tighten the bolt holes of mating plate 18 one by one using bolts 9. Use a feeler gauge to check the contact area between bracket 12 and bracket 24; the gap should be ≤0.02mm. Use bolts 9 for rigid locking and mating plate positioning to ensure the precise dimensions of the annular cavity formed by bracket 12 and bracket 24, providing a stable rolling space for the spinning ball 6 and avoiding the increased wear caused by uneven surface contact gaps in traditional spinning parts. Open the sealing plug 20 of the inner wall ring box 7 of bracket 12 and inject extreme pressure lithium-based grease through the oil hole 19 at the upper end of ring box 7. After injecting grease, retighten the sealing plug 20 to prevent grease leakage during spinning. Manually rotate the spinning ball 6 to place it into the annular cavity formed by bracket 12 and bracket 24. Manually push the spinning ball 6 to roll and observe the oil droplets 21 on the inner wall of ring box 7. The oil droplets 21 roll with the spinning ball 6. The lubricant in the oil chamber 22 is evenly transferred to the surface of the spinning ball 6 through contact, and at the same time penetrates to the contact points between the bottom support ball 10, the top support ball 11 and the rail wall. Through the synergy of the upper oil ball 21 and the lubricant, the rolling friction coefficient is reduced. The assembled device is fixed to the worktable bolt 9 of the multi-degree-of-freedom feed device through the mounting hole 12 at the lower end of the mounting base 1, ensuring that the coaxiality between the mounting base 1 and the worktable is ≤0.02mm. The rotary drive interface and pressure detection interface of the mounting base 1 are connected to the control system. The rotation function of the device is debugged. The spindle speed is adjustable from 0-3000r / min, the radial feed function is adjustable, and the feed speed is adjustable from 0-20mm / min. The annular distribution design of the mounting hole 12 ensures that the device is evenly stressed and avoids the mounting base 1 from shifting during feeding. The multi-degree-of-freedom feed device, in conjunction with the rolling contact of the spinning ball 6, can realize a helical feed path, which is adapted to the arc contour requirements of the outer ring raceway.

[0047] The outer ring blank to be processed is fixed on the workpiece table of the feed equipment using a special fixture. The position of the workpiece table is adjusted so that the axis of the outer ring blank is aligned with the axis of the spinning ball 6. The position of the bracket 2 4 is finely adjusted by the positioning block 17 at the lower end of the docking plate 3 16. When the positioning block 17 slides along the positioning hole 18, it drives the upper pressure rail 23 and the top support ball 11 to move synchronously. Finally, the outer circle of the spinning ball 6 makes slight contact with the inner wall of the outer ring blank. After positioning is completed, the position of the docking plate 3 16 is locked. According to the material and size of the outer ring blank, the parameters are preset in the feed equipment control system. The feed equipment is started through the control system. The mounting base 1 drives the spinning support assembly to rotate with the spindle. At the same time, the feed equipment drive device feeds along the radial direction of the outer ring blank at a preset speed. The spinning ball 6 and the outer ring The blank inner wall contacts the ball, and under the action of rotational centrifugal force and radial feed force, the spinning ball 6 rolls along the inner wall of the outer ring. At this time, the bottom support ball 10 rolls along the lower support rail 24 and the top support ball 11 rolls along the upper pressure rail 23, which together provide stable rolling support for the spinning ball 6 and prevent the spinning ball 6 from deviating. The contact mode between the spinning ball 6 and the outer ring is dynamic point contact. The contact point changes continuously as the ball rolls. The frictional heat is quickly dispersed to the entire outer ring without local overheating. The grease is continuously transferred to the contact interface through the oil ball 21, further reducing rolling friction loss. By adding the bottom support ball 10 and the top support ball 11 to the spinning ball 6, the traditional surface contact sliding friction is completely transformed into point contact rolling friction, solving the core pain points of large wear and local overheating in traditional spinning.

[0048] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0049] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A ball spinning forming device for an integral outer ring self-lubricating spherical plain bearing, comprising a mounting base (1), a first bracket (2), a second bracket (4), and spinning balls (6), characterized in that: The mounting base (1) is provided with a bracket (2) arranged in a ring array at the upper end. The bracket (2) is provided with a lower support rail (24) at the lower end. The lower support rail (24) is provided with bottom support beads (10) arranged in a ring array. The bracket (2) is provided with a bracket (4) arranged in a ring array above the bracket (2). The bracket (2) and the bracket (4) constitute the main structure of the spinning support assembly. The bracket (4) is provided with an upper pressure rail (23) at the upper end. The upper pressure rail (23) is provided with a top support bead (11) arranged in a ring array inside the upper pressure rail (23). The bracket (2) and the bracket (4) are provided with spinning balls (6) that are rolled and fitted with the bottom support beads (10) and the top support beads (11).

2. The ball spin forming device for an integral outer ring self-lubricating spherical plain bearing according to claim 1, characterized in that: Each of the brackets 1 (2) and 2 (4) is provided with a docking plate 1 (8) at one end, and the docking plates 1 (8) are fixed together by bolts (9).

3. The ball spin forming device for an integral outer ring self-lubricating spherical plain bearing according to claim 1, characterized in that: The upper end of the mounting base (1) is provided with docking plates two (15) arranged in a ring array and spaced apart from the bracket one (2). The outer wall of the upper pressure rail (23) is provided with docking plates three (16) arranged in a ring array and spaced apart from the bracket two (4). The docking plates two (15) are all provided with positioning holes (18). The lower end of the docking plates three (16) is provided with positioning blocks (17) that are slidably installed inside the positioning holes (18).

4. The ball spin forming device for an integral outer ring self-lubricating spherical plain bearing according to claim 1, characterized in that: The mounting base (1) has mounting holes (12) arranged in a ring array at its lower end. Each of the top support beads (11) is provided with a retainer (14), and each of the bottom support beads (10) is provided with a retainer (13).

5. The ball spin forming device for an integral outer ring self-lubricating spherical plain bearing according to claim 3, characterized in that: The outer walls of the second bracket (4) and the third docking plate (16) are both welded with a second reinforcing ring (5), and the first bracket (2) and the second docking plate (15) are both welded with a first reinforcing ring (3).

6. The ball spinning forming device for an integral outer ring self-lubricating spherical plain bearing according to claim 1, characterized in that: The inner wall of the bracket (2) is provided with an annular box (7), and the inner wall of the annular box (7) is rolled with oil beads (21) arranged in a ring array. The annular box (7) is provided with an oil cavity (22), and the upper end of the annular box (7) is provided with an oil hole (19). The oil hole (19) is provided with a sealing plug (20).

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