Tool for hot riveting of bearing rivets
Patent Information
- Application Number
- CN202521334375.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-26
- Publication Date
- 2026-09-08
- Estimated Expiration
- 2035-06-26
AI Technical Summary
现有的热铆压工装主要有以下几个问题：一是现有的工装难以对铆钉定位，上铆头与铆钉及保持器兜孔间的同轴度无法保证，大大增加了铆压时的难度；二是加热效率低、能耗高，温度控制不精确，易导致铆钉的材料性能下降；三是现有工装无法保证保持架水平，在铆压过程中可能会导致保持架与铆钉之间发生相对偏移，进而造成铆钉压歪、压坏
[0005]The advantages of this design are as follows: The first central conical hole of the upper electrode holder is interference-fitted with the first conical part of the upper electrode tube, and the second central conical hole of the lower electrode holder is fit with the second conical part of the lower electrode tube, forming a conical positioning chain. This conical fit achieves a gapless connection through axial pressure, with the axial deviation of the upper and lower rivet heads ≤0.05mm, a four-fold improvement compared to the traditional cylindrical surface fit (error ≥0.2mm). This ensures the rivet is subjected to vertical force during riveting, preventing upsetting deformation or breakage due to eccentricity. The conical structure utilizes friction for self-locking, maintaining connection stability without additional fasteners. Disassembly requires only a gentle axial push, reducing rivet head replacement time from 10 minutes with traditional tooling to 2 minutes, improving tooling maintenance efficiency. Furthermore, the adjusting seat on the base is equipped with a slide rail, allowing the slider to slide laterally within the rail (movement range ±15mm). The top of the slider is supported by a spherical bearing ring, achieving leveling through a three-point support principle. The slider can counteract the tilt of the retainer caused by machining errors (tilt ≤ 0.3mm), ensuring the bearing ring's levelness ≤ 0.5°, preventing relative misalignment between the retainer and rivet during riveting, and preventing rivet misalignment or retainer deformation. By adjusting the seat height, the fixture can be adapted to bearings with rivet lengths of 5~15mm, eliminating the need for customized special fixtures and reducing production costs by more than 30%. Simultaneously, with height gauge calibration, the adjustment component can precisely control the rivet head's pressing depth (error ≤ 0.08mm), ensuring consistent rivet upsetting and meeting riveting processes with different strength requirements. This fixture, through a composite structure of "tapered positioning + dynamic leveling + height adjustment," solves the problems of insufficient rivet coaxiality, difficulty in leveling the retainer, and poor tooling versatility in existing technologies, significantly improving riveting accuracy, production efficiency, and workpiece qualification rate, especially suitable for precision riveting scenarios of high-speed bearings.
Smart Images
Figure CN224724935U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a tooling for hot riveting of bearing rivets. Background Technology
[0002] As bearing operating speeds continue to increase, the impact of hot riveting on bearing stability becomes increasingly significant. Strictly controlling the hot riveting effect can reduce the impact of vibration, noise, and uneven wear on bearing performance and lifespan during high-speed operation. Existing hot riveting fixtures have several problems: First, they struggle to position the rivets, and the coaxiality between the rivet head, rivet, and retainer pocket cannot be guaranteed, greatly increasing the difficulty of riveting. Second, they have low heating efficiency, high energy consumption, and inaccurate temperature control, which can easily lead to a decline in the material properties of the rivets. Third, existing fixtures cannot ensure the cage is level, which may cause relative misalignment between the cage and rivet during riveting, resulting in misaligned or damaged rivets. Therefore, it is necessary to position the rivets and level the retainer simultaneously; however, existing fixtures cannot adjust the cage level, thus failing to guarantee the riveting effect. Utility Model Content
[0003] To address the shortcomings of existing technologies, this utility model provides a tooling for hot riveting of bearing rivets. It has a simple structure, can effectively complete the riveting process, and has good performance.
[0004] To achieve the above objectives, this utility model provides a tooling for hot riveting of bearing rivets, including a base, a lower electrode seat, and an upper electrode seat for connection to a drive motor. The lower electrode seat is connected to the base. The upper electrode seat has a first central conical hole, and an upper electrode tube is fitted into the first central conical hole. The upper electrode tube includes a first conical portion and a first connecting portion. The upper electrode tube is connected to the first central conical hole through the first conical portion to form a connection between the upper electrode tube and the upper electrode seat. An upper riveting head is also connected to the upper electrode tube. The lower electrode seat has a second central conical hole, and a lower electrode tube is fitted into the second central conical hole. The lower electrode tube includes a second conical portion and a second connecting portion. The lower electrode tube is connected to the second central conical hole through the second conical portion to form a connection between the lower electrode tube and the lower electrode seat. A lower riveting head is also connected to the lower electrode tube. The lower riveting head and the upper riveting head are arranged opposite to each other. The base also has an adjusting seat and an adjusting component for driving the adjusting seat to rise and fall. The adjusting seat also has a slide rail, on which a slider for supporting the bearing ring body to remain horizontal is slidably arranged.
[0005] The advantages of this design are as follows: The first central conical hole of the upper electrode holder is interference-fitted with the first conical part of the upper electrode tube, and the second central conical hole of the lower electrode holder is fit with the second conical part of the lower electrode tube, forming a conical positioning chain. This conical fit achieves a gapless connection through axial pressure, with the axial deviation of the upper and lower rivet heads ≤0.05mm, a four-fold improvement compared to the traditional cylindrical surface fit (error ≥0.2mm). This ensures the rivet is subjected to vertical force during riveting, preventing upsetting deformation or breakage due to eccentricity. The conical structure utilizes friction for self-locking, maintaining connection stability without additional fasteners. Disassembly requires only a gentle axial push, reducing rivet head replacement time from 10 minutes with traditional tooling to 2 minutes, improving tooling maintenance efficiency. Furthermore, the adjusting seat on the base is equipped with a slide rail, allowing the slider to slide laterally within the rail (movement range ±15mm). The top of the slider is supported by a spherical bearing ring, achieving leveling through a three-point support principle. The slider can counteract the tilt of the retainer caused by machining errors (tilt ≤ 0.3mm), ensuring the bearing ring's levelness ≤ 0.5°, preventing relative misalignment between the retainer and rivet during riveting, and preventing rivet misalignment or retainer deformation. By adjusting the seat height, the fixture can be adapted to bearings with rivet lengths of 5~15mm, eliminating the need for customized special fixtures and reducing production costs by more than 30%. Simultaneously, with height gauge calibration, the adjustment component can precisely control the rivet head's pressing depth (error ≤ 0.08mm), ensuring consistent rivet upsetting and meeting riveting processes with different strength requirements. This fixture, through a composite structure of "tapered positioning + dynamic leveling + height adjustment," solves the problems of insufficient rivet coaxiality, difficulty in leveling the retainer, and poor tooling versatility in existing technologies, significantly improving riveting accuracy, production efficiency, and workpiece qualification rate, especially suitable for precision riveting scenarios of high-speed bearings.
[0006] As a further feature of this utility model, the adjustment seat has an adjustment hole at its center, and guide holes are provided at the four corner edges of the adjustment seat. A guide post is provided on the base corresponding to the position of the guide hole. The guide post is inserted into the guide hole. An adjustment stud is also rotatably provided on the base. The adjustment stud is threaded into the adjustment hole.
[0007] The advantages of this design are as follows: The adjusting hole at the center of the adjusting seat engages with the threaded adjusting stud on the base, forming a helical transmission mechanism. Rotating the stud allows for precise control of the adjusting seat's height, achieving an accuracy of 0.1mm per turn. The four corner guide holes, connected to the guide posts, limit the radial displacement of the adjusting seat, preventing tilting during lifting and ensuring the horizontality of the slider support surface. This structure combines the precision of the helical transmission with the stability of the guide posts, achieving both fine-tuning of height and ensuring a smooth adjustment process, making it suitable for rapid positioning of bearing workpieces of varying heights.
[0008] As a further feature of this invention, the slide rails are two in number, and the two slide rails are distributed in a figure-eight shape on the adjustment seat.
[0009] The advantages of this design are as follows: With the two slides arranged in a V-shape and an opening angle of approximately 120°, the slider can slide laterally within the slides (with a movement range of ±20mm), accommodating bearing rings of different diameters. When the bearing inner diameter changes, the slider adjusts the spacing between the support points along the V-shaped slides, forming an adaptive support surface. This ensures that rings of different sizes can be horizontally supported, avoiding insufficient adaptability issues caused by fixed support points. This expands the applicable bearing inner diameter range of the tooling from 20~50mm to 15~60mm, significantly improving versatility.
[0010] As a further feature of this invention, the edge of the adjustment seat has a notch corresponding to the position of the lower electrode seat.
[0011] The advantages of this design are as follows: The notch on the edge of the adjusting seat, with its shape matching the outer contour of the lower electrode seat and a spacing of 5-8mm, prevents collision and interference between the adjusting seat and the lower electrode seat during lifting and lowering. This notch design ensures that the adjusting seat can move freely within its maximum lifting stroke (20-30mm) without affecting the stability of the lower electrode seat. Furthermore, the notch provides operating space, facilitating tool insertion during lower rivet head replacement, reducing disassembly and assembly interference, improving tooling maintenance convenience, and preventing adjustment jamming or component wear caused by structural interference. Attached Figure Description
[0012] Figure 1 This is a cross-sectional structural diagram of the upper electrode holder in an embodiment of the present invention; Figure 2 This is a top view of the upper electrode holder in an embodiment of the present invention; Figure 3 This is a cross-sectional structural diagram of the lower electrode holder in an embodiment of the present invention; Figure 4 This is a top view of the lower electrode holder in an embodiment of this utility model; Figure 5 This is a schematic cross-sectional view of the upper electrode tube in an embodiment of this utility model; Figure 6 This is a side view of the upper electrode tube in an embodiment of the present invention; Figure 7 This is a cross-sectional structural diagram of the lower electrode tube in an embodiment of this utility model; Figure 8 This is a side view of the lower electrode tube in an embodiment of the present invention; Figure 9 This is a top view of the adjusting seat in an embodiment of the present invention; Figure 10 This is a schematic diagram of the assembly structure of the lower electrode holder and the adjustment seat on the base according to an embodiment of the present invention. Detailed Implementation
[0013] The implementation of this utility model for the tooling of hot riveting of bearing rivets is as follows: Figures 1 to 10As shown: The system includes a base 1, a lower electrode seat 3, and an upper electrode seat 6 for connection to a drive motor. The lower electrode seat is connected to the base 1. The upper electrode seat 6 has a first central conical hole 61, on which an upper electrode tube 7 is fitted. The upper electrode tube 7 includes a first conical portion 71 and a first connecting portion 72. The upper electrode tube 7 is connected to the first central conical hole 61 through the first conical portion 71, forming a connection between the upper electrode tube 7 and the upper electrode seat 6. An upper rivet head is also connected to the upper electrode tube 7. The lower electrode seat 3 has a second central conical hole 31. A lower electrode tube 4 is fitted onto the central conical hole 31. The lower electrode tube 4 includes a second conical part 41 and a second connecting part 42. The lower electrode tube 4 is connected to the second central conical hole 31 through the second conical part 41 to form a connection between the lower electrode tube 4 and the lower electrode seat 3. A lower rivet head 5 is also connected to the lower electrode tube 4. The lower rivet head 5 and the upper rivet head are arranged opposite to each other. An adjusting seat 2 and an adjusting component for driving the adjusting seat 2 to rise and fall are also provided on the base 1. A slide rail 21 is also provided on the adjusting seat 2. A slider 24 for supporting the bearing ring body to keep it horizontal is slidably arranged on the slide rail 21. The beneficial effects of this design are as follows: With this design, the first central conical hole 61 of the upper electrode seat 6 and the first conical part 71 of the upper electrode tube 7 are interference-fitted, and the second central conical hole 31 of the lower electrode seat 3 and the second conical part 41 of the lower electrode tube 4 are similarly fitted, forming a conical positioning chain. The conical fit achieves a gapless connection through axial pressure, with the axial deviation of the upper and lower rivet heads 5 ≤ 0.05mm, which is 4 times better than the traditional cylindrical surface fit (error ≥ 0.2mm). This ensures that the rivet is subjected to vertical force during riveting, avoiding upsetting deformation or breakage due to eccentricity. The conical structure utilizes friction for self-locking, maintaining connection stability without additional fasteners. Disassembly only requires a gentle axial push, reducing rivet head replacement time from 10 minutes with traditional tooling to 2 minutes, improving tooling maintenance efficiency. Furthermore, the adjusting seat 2 on the base 1 is equipped with a slide 21, and the slider 24 slides laterally within the slide 21 (movement range ±15mm). The top spherical support bearing ring of the slider 24 is leveled through a three-point support principle. The slider 24 can compensate for the tilt of the retainer caused by machining errors (tilt ≤ 0.3mm), ensuring the bearing ring's levelness ≤ 0.5°, preventing relative misalignment between the retainer and rivet during riveting, and preventing rivet misalignment or retainer deformation. By adjusting the height of the adjusting seat 2, the tooling can be adapted to bearings with rivet lengths of 5~15mm, eliminating the need for customized tooling and reducing production costs by more than 30%. Simultaneously, with height gauge calibration, the adjusting assembly can precisely control the pressing depth of the upper rivet head (error ≤ 0.08mm), ensuring consistent rivet upsetting and meeting riveting processes with different strength requirements.This tooling, through a composite structure of "tapered positioning + dynamic leveling + height adjustment", solves the problems of insufficient rivet coaxiality, difficulty in leveling the retainer, and poor tooling versatility in existing technologies, significantly improving riveting accuracy, production efficiency, and workpiece qualification rate. It is especially suitable for precision riveting scenarios of high-speed bearings.
[0014] As a further feature of this embodiment, the adjusting seat 2 has an adjusting hole 22 at its center and guide holes at its four corner edges. Guide posts are positioned on the base 1 corresponding to the guide holes, and these guide posts are inserted into the guide holes. An adjusting stud 25 is also rotatably mounted on the base 1, and this stud 25 is threaded into the adjusting hole 22. The advantages of this configuration are: the adjusting hole 22 at the center of the adjusting seat 2 and the adjusting stud 25 on the base 1 form a helical transmission mechanism. Rotating the stud allows for precise control of the raising and lowering of the adjusting seat 2, with an accuracy of 0.1 mm / turn. The four corner guide holes, inserted into the guide posts, limit the radial displacement of the adjusting seat 2, preventing tilting during raising and lowering and ensuring the horizontality of the slider 24's support surface. This structure combines the precision of the helical transmission with the stability of the guide posts, achieving both fine-tuning of the height and ensuring a smooth adjustment process, making it suitable for rapid positioning of bearing workpieces of different heights.
[0015] As a further feature of this embodiment, the slide rails 21 are two in number, arranged in a V-shape on the adjusting seat 2. The advantages of this arrangement are: with the two slide rails 21 arranged in a V-shape and an opening angle of approximately 120°, the slider 24 can slide laterally within the slide rails 21 (movement range ±20mm), adapting to bearing rings of different diameters. When the bearing inner diameter changes, the slider 24 adjusts the spacing between the support points along the V-shaped slide rails 21, forming an adaptive support surface. This ensures that rings of different sizes can be horizontally supported, avoiding insufficient adaptability caused by fixed support points. This expands the applicable bearing inner diameter range of the tooling from 20~50mm to 15~60mm, significantly improving versatility.
[0016] As a further feature of this embodiment, a notch 23 is provided on the edge of the adjusting seat 2 corresponding to the lower electrode seat 3. The advantages of this design are: the notch 23 on the edge of the adjusting seat 2 is shaped to match the outer contour of the lower electrode seat 3, with a spacing of 5-8 mm, preventing collision and interference between the adjusting seat 2 and the lower electrode seat 3 during lifting and lowering. This notch 23 design ensures that the adjusting seat 2 can move freely within its maximum lifting stroke (20-30 mm) without affecting the stability of the lower electrode seat 3. Furthermore, the notch 23 provides operating space, facilitating tool insertion during the replacement of the lower rivet head 5, reducing disassembly and assembly interference, improving tooling maintenance convenience, and preventing adjustment jamming or component wear due to structural interference.
[0017] The above examples are merely one preferred embodiment of this utility model. Ordinary variations and substitutions made by those skilled in the art within the scope of this utility model's technical solution are all included within the protection scope of this utility model.
Claims
1. A tooling for hot riveting of bearing rivets, comprising a base, a lower electrode holder, and an upper electrode holder for connection to a drive motor, characterized in that: The lower electrode seat is connected to the base. The upper electrode seat has a first central conical hole, and an upper electrode tube is fitted into the first central conical hole. The upper electrode tube includes a first conical portion and a first connecting portion. The upper electrode tube is connected to the first central conical hole through the first conical portion to form a connection between the upper electrode tube and the upper electrode seat. An upper rivet head is also connected to the upper electrode tube. The lower electrode seat has a second central conical hole, and a lower electrode tube is fitted into the second central conical hole. The lower electrode tube includes a second conical portion and a second connecting portion. The lower electrode tube is connected to the second central conical hole through the second conical portion to form a connection between the lower electrode tube and the lower electrode seat. A lower rivet head is also connected to the lower electrode tube. The lower rivet head and the upper rivet head are arranged opposite to each other. The base is also provided with an adjusting seat and an adjusting component for driving the adjusting seat to rise and fall. The adjusting seat is also provided with a slide rail, and a slider for supporting the bearing ring body to remain horizontal is slidably arranged on the slide rail.
2. The tooling for hot riveting of bearing rivets according to claim 1, characterized in that: The adjusting seat has an adjusting hole at its center and guide holes at its four corner edges. A guide post is provided on the base corresponding to the guide hole position. The guide post is inserted into the guide hole. An adjusting stud is also rotatably provided on the base. The adjusting stud is threaded into the adjusting hole.
3. The tooling for hot riveting of bearing rivets according to claim 1 or 2, characterized in that: The slide consists of two tracks, which are arranged in a figure-eight shape on the adjustment seat.
4. The tooling for hot riveting of bearing rivets according to claim 1, characterized in that: The edge of the adjustment seat has a notch corresponding to the position of the lower electrode seat.