A rotary riveting machine and its processing technology

Abstract

The invention discloses a rotary riveting machine, comprising a vertically arranged linear module, a rivet head arranged on the linear module, and a tooling assembly matched with a wheel hub bearing, wherein the wheel hub bearing comprises an inner ring, an outer ring flange and a flange shaft, the end of the flange shaft extends out of the end face of the inner ring to form a hollow shaft, the hollow shaft is used for rotary riveting to form a flange pressed on the inner ring, the rivet head is tiltedly arranged on the linear module through a driven shaft, and the tooling assembly comprises: a lower die frame for fixing the flange shaft of the wheel hub bearing, a rotating mechanism is connected to the bottom of the lower die frame, and the rotating mechanism drives the flange shaft to rotate; the invention drives the flange shaft to rotate through the rotating mechanism, and the rivet head is driven to rotate under the drive of the flange shaft. Compared with the original rotary riveting machine in which both downward movement and rotation are realized by the rivet head, the rivet head of the present invention is only responsible for downward movement to give pressure to the flange shaft, and the rotation is realized by the rotating mechanism driving the flange shaft, so that the transmission structure of the rivet head is simplified and the riveting stability is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of automobile wheel hub bearing spin riveting equipment, in particular to a spin riveting machine and a processing technology thereof. Background Art

[0002] The automatic riveting machine uses a punching machine and a special connection die to connect two or more layers of plates of different materials and thicknesses through an instantaneous high-pressure processing process based on the cold extrusion deformation of the plate material itself. The riveting machine is also used on automobile wheel hub bearings. For the riveting of wheel hub bearings, the hollow flange on the upper part of the flange shaft is usually deformed by the rivet head to form a flange, and finally riveted to the end face of the inner ring;

[0003] In the prior art, the rotary riveting machine used to complete riveting and flanging usually fixes the wheel hub bearing on a workbench, sets the rivet head on a vertical track, and drives the rivet head to rotate by a motor. The angle between the rivet head and the axis of the wheel hub bearing is relatively small, usually set at 3° or 5°. The pressure required by the rivet head during the flanging process is very large, and it will cause the expansion coefficient at the vertical angle of the flanging to be too large, which is prone to cracks or even breakage. At the same time, the rivet head is close to vertical, and the parallelism accuracy of the horizontal side of the flanging is not high, which can easily lead to excessive deformation of the inner ring of the bearing hub after riveting. Summary of the invention

[0004] In view of the deficiencies in the prior art, the object of the present invention is to provide a rotary riveting machine and a processing technology thereof, so as to increase the quality of rotary riveting flanging of wheel hub bearings, and at the same time improve the working efficiency and the rotary riveting stability.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions:

[0006] A rotary riveting machine comprises a vertically arranged linear module, a rivet head arranged on the linear module, and a tooling assembly matched with a wheel hub bearing, wherein the wheel hub bearing comprises an inner ring, an outer ring flange and a flange shaft, the end of the flange shaft extends out of the inner ring end surface to form a hollow shaft, the hollow shaft is used for rotary riveting to form a flange pressed on the inner ring, the rivet head is arranged obliquely on the linear module through a driven shaft, and the tooling assembly comprises:

[0007] A lower mold frame, the flange shaft of the wheel hub bearing is fixed on the lower mold frame, and a rotating mechanism is connected to the bottom of the lower mold frame, and the rotating mechanism drives the flange shaft to rotate;

[0008] A positioning frame, the positioning frame is connected to the linear module, and the positioning frame has a pressing surface matched with the outer ring flange;

[0009] The linear module drives the positioning frame downward and abuts against the outer ring flange for positioning, the linear module drives the rivet head downward and contacts the end of the hollow shaft, and the flange shaft rotates around the axis X-axis of the hub bearing under the drive of the rotating mechanism, the rivet head rotates around the axis Y-axis of the rivet head driven by the friction between the flange shaft and the rivet head, and the linear module drives the rivet head to continue to descend to perform rotary riveting and flanging on the flange shaft.

[0010] Furthermore, the angle between the axis X of the wheel hub bearing and the axis Y of the rivet head is 30°.

[0011] Furthermore, the positioning frame includes an upper positioning plate, a lower positioning plate and an elastic member for buffering between the upper and lower positioning plates, the pressing surface is the bottom surface of the lower positioning plate, the elastic member is a spring column for connecting the upper and lower positioning plates, the rivet head is located between the upper and lower positioning plates, and a through hole is also provided on the lower positioning plate. During the downward positioning process of the positioning frame, the hollow shaft passes through the through hole and abuts against the rivet head.

[0012] Furthermore, the rivet head is connected to the linear module through a connecting seat, the driven shaft is rotatably inserted into the connecting seat, a bearing is sleeved between the driven shaft and the connecting seat, and the rivet head is fixedly connected to the driven shaft and exposed at the front end of the connecting seat.

[0013] Furthermore, the linear module comprises two vertical slide rails, a linear module and a driving mechanism for driving the linear module to move vertically. The linear module is an integral casting, and the linear module is slidably arranged on the two vertical slide rails through the driving mechanism.

[0014] Furthermore, it also includes a detection mechanism, which includes a first bracket, a first cylinder and a detection head connected to the piston rod of the first cylinder, and a receiving seat for receiving the wheel hub bearing is also provided below the detection head. The detection head includes an outer detection ring and an inner detection ring inserted in the outer detection ring, and the inner detection ring can be translated up and down relative to the outer detection ring. The first cylinder drives the detection head downward to contact the wheel hub bearing, the outer detection ring abuts against the inner ring end face of the wheel hub bearing, and the inner detection ring abuts against the upper end face of the flange of the wheel hub bearing.

[0015] Furthermore, it also includes an oil filling mechanism, which includes a second bracket, a second cylinder and an oil filling head connected to the piston rod of the second cylinder, and a second receiving seat for receiving the wheel hub bearing is also provided below the oil filling head, and it also includes an oil dripping bottle, the oil filling head includes an oil inlet and an oil outlet, the oil inlet is connected to the oil dripping bottle, and the oil outlet is annular and corresponds to the hollow shaft of the wheel hub bearing.

[0016] Furthermore, it also includes a transport mechanism, which includes a transport plate, a transverse movement module for driving the transport plate to move horizontally, and a vertical movement module for driving the transport plate to move vertically. One side of the transport plate is provided with a plurality of arc-shaped receiving grooves, and the receiving grooves can cooperate with the outer ring flange of the hub bearing, so as to receive the hub bearing on the transport plate.

[0017] The present invention also includes a processing technology applied to the above-mentioned rotary riveting machine, comprising the following steps:

[0018] A. Oiling: The transport mechanism transports the hub bearing to be flanging to the oiling mechanism, and the oiling head moves downward to complete the oiling of the hollow shaft edge of the hub bearing;

[0019] B. Installation and adjustment: The transport mechanism transports the wheel hub bearing to be flanged to the top of the lower die frame, installs the wheel hub bearing on the lower die frame, adjusts the horizontality of the flange shaft end surface, and adjusts the angle between the rivet head and the wheel hub bearing axis to 30°;

[0020] C. Pre-positioning: The linear module moves downward, the positioning frame contacts the outer ring flange, the elastic part remains under pressure, and the rivet head contacts the end of the hollow shaft;

[0021] D. Rotary riveting and flanging: The rotating mechanism moves, driving the lower die frame to drive the flange shaft to rotate, and the flange shaft drives the rivet head to rotate with it. The rivet head rolls on the inner wall of the hollow shaft, and the linear die set continues to move downward. The end of the hollow shaft is opened and radially expanded by the rivet head until the rivet head reaches the predetermined pressure to form a flanging;

[0022] E. Inspection: The transport mechanism transports the flanged wheel hub bearing to the inspection mechanism, and the inspection head moves downward to inspect the thickness of the vertical edge and the flatness of the horizontal edge of the flange.

[0023] The processing technology is further such that in step C, the downward pressure of the linear module is 200 kg and the feed rate is 10 mm;

[0024] In step D, the rotation speed of the rotating mechanism is 400-600 rpm, the downward pressure of the linear module is 5t, and the feed amount of the linear module is 5mm. After the flanging is formed, the rotating mechanism continues to move so that the rivet head rolls the end of the hollow shaft for 4-5s, and then maintains the pressure for 1s after rolling to control the elastic recovery of the flanging to reduce the radial and axial clearances between the hub bearings.

[0025] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0026] 1. The flange shaft is driven to rotate by the rotating mechanism, and the rivet head is driven to rotate under the drive of the flange shaft. Compared with the original solution in which both the downward movement and the rotation of the rotary riveting machine are realized by the rivet head, the rivet head in this solution is only responsible for downward movement to give pressure to the flange shaft, while the rotation is realized by the rotating mechanism driving the flange shaft, so that the transmission structure of the rivet head is simplified, and the two drives are independent of each other so that there will be no mutual interference during the riveting process, ensuring the stability of the riveting;

[0027] 2. The angle between the rivet head and the wheel hub bearing is set at 30°. Compared with the small angle solution of the original rotary riveting machine, this solution requires less rivet head pressure and less load on the linear module, reducing the probability of failure. The 30° angle can reduce the expansion coefficient at the vertical angle of the flange, thereby avoiding cracks or fractures at the vertical angle of the flange. At the same time, it can also reduce the deformation of the inner ring of the wheel hub bearing during the riveting process.

[0028] 3. The linear module adopts an integrated casting and is slidably set on two vertical slide rails. The two slide rails ensure the stability of the module's downward movement, while the integrated casting can prevent imbalance on the left and right sides.

[0029] 4. An oiling mechanism, a detection mechanism and a transportation mechanism are provided to complete all the steps required for riveting and flanging in one device, and the wheel hub bearings are automatically transferred between several mechanisms through the transportation mechanism, which can save manpower and avoid the occurrence of safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the structure of the wheel hub bearing before flanging and after flanging;

[0031] Figure 2 It is a structural schematic diagram of the rotary riveting machine of the present invention.

[0032] Figure 3 It is a structural schematic diagram of the linear module of the present invention.

[0033] Figure 4 It is a cross-sectional view of the linear module of the present invention.

[0034] Figure 5 It is a schematic diagram of the mechanism of the positioning frame and the rivet head of the present invention.

[0035] Figure 6 It is a structural schematic diagram of the rivet head of the present invention.

[0036] Figure 7 It is a structural schematic diagram of the oil dripping, detection and transportation mechanism of the present invention.

[0037] Figure 8 It is a cross-sectional view of the detection mechanism of the present invention.

[0038] Fig. 9 yes Figure 8 A magnified schematic diagram of center A.

[0039] Fig.10 It is a cross-sectional view of the oil dripping mechanism of the present invention.

[0040] Fig.11 yes Fig.10 A magnified schematic diagram of point B in the middle.

[0041] Fig.12 It is a schematic diagram of the cooperation between the rivet head and the flange of the present invention.

[0042] In the figure: 1. wheel hub bearing; 2. inner ring; 3. outer ring flange; 4. flange shaft; 5. flanging; 6. linear module; 7. rivet head; 8. driven shaft; 9. lower die frame; 10. rotating mechanism; 11. positioning frame; 12. upper positioning plate; 13. lower positioning plate; 14. spring column; 15. through hole; 16. connecting seat; 17. vertical slide rail; 18. linear module; 19. driving mechanism; 20. detection mechanism; 21. The first bracket; 22. The first cylinder; 23. The detection head; 24. The first receiving seat; 25. The outer detection ring; 26. The inner detection ring; 27. The oil filling mechanism; 28. The second bracket; 29. ​​The second cylinder; 30. The oil filling head; 31. The second receiving seat; 32. The oil dripping bottle; 33. The oil inlet; 34. The oil outlet; 35. The transport mechanism; 36. The transport plate; 37. The transverse movement module; 38. The vertical movement module; 39. The receiving groove. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] It should be understood that although the terms upper, middle, lower, top, end, etc. appear in this article to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish elements from each other for easy understanding, and are not used to define any direction or order limitation.

[0045] like Figure 2-12 As shown, a rotary riveting machine comprises a vertically arranged linear module 6, a rivet head 7 arranged on the linear module 6, and a tooling assembly matched with a hub bearing 1, wherein the hub bearing 1 comprises an inner ring 2, an outer ring flange 3 and a flange shaft 4, the end of the flange shaft 4 extends out of the end surface of the inner ring 2 to form a hollow shaft, and the hollow shaft is used for rotary riveting to form a flange 5 pressed on the inner ring 2, the rivet head 7 is tiltedly arranged on the linear module 6 through a driven shaft 8, and the tooling assembly comprises:

[0046] A lower mold frame 9, on which the flange shaft 4 of the wheel hub bearing 1 is fixed, and a rotating mechanism 10 is connected to the bottom of the lower mold frame 9, and the rotating mechanism 10 drives the flange shaft 4 to rotate;

[0047] A positioning frame 11, the positioning frame 11 is connected to the linear module 6, and the positioning frame 11 has a pressing surface that cooperates with the outer ring flange 3;

[0048] The linear module 6 drives the positioning frame 11 downward and abuts against the outer ring flange 3 for positioning, the linear module 6 drives the rivet head 7 downward and contacts the end of the hollow shaft, and the flange shaft 4 rotates around the axis X of the hub bearing 1 under the drive of the rotating mechanism 10, and the rivet head 7 rotates around the axis Y of the rivet head 7 driven by the friction between the flange shaft 4 and the rivet head 7, and the linear module 6 drives the rivet head 7 to continue downward to perform rotary riveting and flanging on the flange shaft 4.

[0049] In this embodiment, the angle between the axis X of the wheel hub bearing 1 and the axis Y of the rivet head 7 is 30°, wherein the angle of 30° is the optimal solution angle obtained after riveting experiments at various angles. The specific experimental data are shown in the following table:

[0050]

[0051] The calculation formula of the deformation amount α of the inner ring 2 of the wheel hub bearing 1 after flange mentioned in the above table is: α = xy, where x and y are as follows: Figure 1 The figure shows the inner ring 2 diameter of the bearing hub before and after flanging.

[0052] In this embodiment, the positioning frame 11 includes an upper positioning plate 12, a lower positioning plate 13 and an elastic member for buffering between the upper and lower positioning plates, the pressing surface is the bottom surface of the lower positioning plate 13, the elastic member is a spring column 14 for connecting the upper and lower positioning plates, the rivet head 7 is located between the upper and lower positioning plates, and a through hole 15 is also provided on the lower positioning plate 13. During the downward positioning process of the positioning frame 11, the hollow shaft passes through the through hole 15 and abuts against the rivet head 7.

[0053] In this embodiment, the rivet head 7 is connected to the linear module 6 through the connecting seat 16, the driven shaft 8 can be rotatably inserted into the connecting seat 16, a bearing is provided between the driven shaft 8 and the connecting seat 16, and the rivet head 7 is fixedly connected to the driven shaft 8 and exposed at the front end of the connecting seat 16.

[0054] In this embodiment, the linear module 6 includes two vertical slide rails 17, a linear module 18 and a driving mechanism 19 for driving the linear module 18 to move vertically. The linear module 18 is an integral casting, and the linear module 18 is slidably disposed on the two vertical slide rails 17 through the driving mechanism 19.

[0055] In this embodiment, a detection mechanism 20 is also included, and the detection mechanism 20 includes a first bracket 21, a first cylinder 22 and a detection head 23 connected to the piston rod of the first cylinder 22. A receiving seat for receiving the wheel hub bearing 1 is also provided below the detection head 23. The detection head 23 includes an outer detection ring 25 and an inner detection ring 26 inserted in the outer detection ring 25. The inner detection ring 26 can be translated up and down relative to the outer detection ring 25. The first cylinder 22 drives the detection head 23 downward to contact the wheel hub bearing 1. The outer detection ring 25 abuts against the end face of the inner ring 2 of the wheel hub bearing 1, and the inner detection ring 26 abuts against the upper end face of the flange 5 of the wheel hub bearing 1.

[0056] In this embodiment, it also includes an oil filling mechanism 27, which includes a second bracket 28, a second cylinder 29 and an oil filling head 30 connected to the piston rod of the second cylinder 29, and a second receiving seat 31 for receiving the wheel hub bearing 1 is provided below the oil filling head 30, and it also includes an oil drop bottle 32, the oil filling head 30 includes an oil inlet 33 and an oil outlet 34, the oil inlet 33 is connected to the oil drop bottle 32, and the oil outlet 34 is annular and corresponds to the hollow shaft of the wheel hub bearing 1.

[0057] In this embodiment, a transport mechanism 35 is also included, and the transport mechanism 35 includes a transport plate 36, a transverse movement module 37 for driving the transport plate 36 to move transversely, and a vertical movement module 38 for driving the transport plate 36 to move vertically. One side of the transport plate 36 is provided with a plurality of arc-shaped receiving grooves 39, and the receiving grooves 39 can cooperate with the outer ring flange 3 of the hub bearing 1, so that the hub bearing 1 is received on the transport plate 36.

[0058] The processing technology applied to the above-mentioned rotary riveting machine in this embodiment specifically includes the following steps:

[0059] A. Oiling: The transport mechanism 35 transports the hub bearing 1 to be flanged to the oiling mechanism 27. The oiling head 30 moves downward so that the oil outlet 34 of the oiling head 30 is aligned with the end face of the hollow shaft of the hub bearing 1. The lubricating oil in the oil dropper 32 is squeezed into the oil inlet 33 of the oiling head 30 along the pipeline, and then evenly drops from the oil outlet 34 to the end face of the hollow shaft of the hub bearing 1.

[0060] B. Installation and adjustment: The transport mechanism 35 transports the wheel hub bearing 1 to be flanged to the top of the lower die frame 9, and installs the wheel hub bearing 1 on the lower die frame 9, adjusts the horizontality of the end surface of the flange shaft 4, and adjusts the angle between the rivet head 7 and the axis of the wheel hub bearing 1 to 30°;

[0061] C. Pre-positioning: The linear module 6 moves downward, the bottom surface of the lower positioning plate 13 contacts the outer ring flange 3, the hollow shaft of the hub bearing 1 passes through the through hole 15 and enters between the upper and lower positioning plates 13, and then the linear module 6 continues to move downward, the spring column 14 is compressed, and the rivet head 7 contacts the end of the hollow shaft;

[0062] D. Rotary riveting and flanging: The rotating mechanism moves, driving the lower die frame 9 to drive the flange shaft 4 to rotate, and the flange shaft 4 drives the rivet head 7 to rotate, and the rivet head 7 rolls on the inner wall of the hollow shaft. The linear die set 6 continues to move downward, and the end of the hollow shaft is opened and radially expanded by the rivet head 7 until the rivet head 7 reaches a predetermined pressure, forming a flanging 5;

[0063] E. Inspection: The transport mechanism 35 transports the hub bearing 1 with completed flange to the inspection mechanism 20, and the inspection head 23 descends to inspect the thickness of the vertical edge and the flatness of the horizontal edge of the flange 5, wherein the flatness inspection is completed by the inner inspection ring 26, and the inner inspection ring 26 stops descending when it contacts the horizontal edge of the flange 5, while the outer inspection ring 25 can continue to descend until it contacts the end face of the inner ring 2 of the hub bearing 1, thereby obtaining the conclusion that the thickness of the vertical edge of the flange 5 is the difference between the downward distances of the inner inspection ring 26 and the outer inspection ring 25.

[0064] The processing technology of this embodiment is further that in step C, the downward pressure of the linear module 6 is 200 kg and the feed amount is 10 mm;

[0065] In step D, the rotation speed of the rotating mechanism is 400-600 rpm, the downward pressure of the linear module 6 is 5 t, the feed amount of the linear module 6 is 5 mm, and after the flange 5 is formed, the rotating mechanism continues to operate so that the rivet head 7 rolls the end of the hollow shaft for 4-5 seconds, and then maintains the pressure for 1 second after rolling, to control the elastic recovery of the flange 5, so as to reduce the radial and axial clearances between the hub bearings 1;

[0066] In this embodiment, the parallelism qualification standard of the horizontal edge of the flange 5 detected in step E is 0.03 mm, and the thickness qualification standard of the vertical edge of the flange 5 is 4 mm ± 0.5 mm.

[0067] The beneficial effects of this embodiment are that the riveting and flanging process is more stable, the pressure required for riveting is also smaller, the various data of the flanging after riveting are better, and the deformation of the inner ring of the hub bearing is also smaller. The processes such as oiling and testing can also be completed in one device, which is faster and safer.

[0068] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A rotary riveting machine, comprising a vertically arranged linear module (6), a rivet head (7) arranged on the linear module (6), and a tooling assembly matched with a hub bearing (1), wherein the hub bearing (1) comprises an inner ring (2), an outer ring flange (3) and a flange shaft (4), the end of the flange shaft (4) protruding from the end surface of the inner ring (2) to form a hollow shaft, and the hollow shaft is used for rotary riveting to form a flange (5) pressed on the inner ring (2), characterized in that: The rivet head (7) is arranged obliquely on the linear module (6) via a driven shaft (8), and the tooling assembly comprises: A lower mold frame (9), the flange shaft (4) of the wheel hub bearing (1) is fixed on the lower mold frame (9), and a rotating mechanism (10) is connected to the bottom of the lower mold frame (9), and the rotating mechanism (10) drives the flange shaft (4) to rotate; A positioning frame (11), the positioning frame (11) is connected to the linear module (6), and the positioning frame (11) has a pressing surface that matches the outer ring flange (3); The linear module (6) drives the positioning frame (11) downward and abuts against the outer ring flange (3) for positioning; the linear module (6) drives the rivet head (7) downward and contacts the end of the hollow shaft; and the flange shaft (4) is driven by the rotating mechanism (10) to rotate around the axis X of the wheel hub bearing (1); the rivet head (7) is driven by the friction between the flange shaft (4) and the rivet head (7) to rotate around the axis Y of the rivet head (7); and the linear module (6) drives the rivet head (7) to continue to move downward to perform rotary riveting and flanging on the flange shaft (4); The positioning frame (11) comprises an upper positioning plate (12), a lower positioning plate (13) and an elastic member for buffering between the upper and lower positioning plates, the pressing surface is the bottom surface of the lower positioning plate (13), the elastic member is a spring column (14) for connecting the upper and lower positioning plates, the rivet head (7) is located between the upper and lower positioning plates, and the lower positioning plate (13) is also provided with a through hole (15), and during the downward positioning process of the positioning frame (11), the hollow shaft passes through the through hole (15) and comes into contact with the rivet head (7); The invention also comprises a detection mechanism (20), wherein the detection mechanism (20) comprises a first bracket (21), a first cylinder (22) and a detection head (23) connected to the piston rod of the first cylinder (22); a first receiving seat (24) for receiving the wheel hub bearing (1) is also provided below the detection head (23); the detection head (23) comprises an outer detection ring (25) and an inner detection ring (26) inserted in the outer detection ring (25); the inner detection ring (26) can move up and down relative to the outer detection ring (25); the first cylinder (22) drives the detection head (23) downward to contact the wheel hub bearing (1); the outer detection ring (25) abuts against the end face of the inner ring (2) of the wheel hub bearing (1); and the inner detection ring (26) abuts against the upper end face of the flange (5) of the wheel hub bearing (1); The invention also comprises an oil injection mechanism (27), the oil injection mechanism (27) comprising a second bracket (28), a second cylinder (29) and an oil injection head (30) connected to the piston rod of the second cylinder (29), a second receiving seat (31) for receiving the wheel hub bearing (1) is provided below the oil injection head (30), and an oil dropper (32), the oil injection head (30) comprising an oil inlet (33) and an oil outlet (34), the oil inlet (33) being connected to the oil dropper (32), and the oil outlet (34) being annular and corresponding to the hollow shaft of the wheel hub bearing (1); The invention also comprises a transport mechanism (35), wherein the transport mechanism (35) comprises a transport plate (36), a transverse movement module (37) for driving the transport plate (36) to move transversely, and a vertical movement module (38) for driving the transport plate (36) to move vertically. A plurality of arc-shaped receiving grooves (39) are provided on one side of the transport plate (36), and the receiving grooves (39) can cooperate with the outer ring flange (3) of the wheel hub bearing (1), so that the wheel hub bearing (1) is received on the transport plate (36).

2. A rotary riveting machine according to claim 1, characterized in that: The angle between the axis X of the wheel hub bearing (1) and the axis Y of the rivet head (7) is 30°.

3. A rotary riveting machine according to claim 1, characterized in that: The rivet head (7) is connected to the linear module (6) via a connecting seat (16); the driven shaft (8) is rotatably inserted into the connecting seat (16); a bearing is sleeved between the driven shaft (8) and the connecting seat (16); the rivet head (7) is fixedly connected to the driven shaft (8) and exposed at the front end of the connecting seat (16).

4. A rotary riveting machine according to claim 1, characterized in that: The linear module (6) comprises two vertical slide rails (17), a linear module (18) and a driving mechanism (19) for driving the linear module (18) to move vertically. The linear module (18) is an integral casting. The linear module (18) is slidably arranged on the two vertical slide rails (17) through the driving mechanism (19).

5. A processing technology of a rotary riveting machine according to any one of claims 1 to 4, comprising the following steps: A. Oiling: The transport mechanism (35) transports the hub bearing (1) to be flanged to the oiling mechanism (27), and the oiling head (30) moves downward to complete oiling of the hollow shaft edge of the hub bearing (1); B. Installation and adjustment: The transport mechanism (35) transports the wheel hub bearing (1) to be flanged to the top of the lower die frame (9), and installs the wheel hub bearing (1) on the lower die frame (9), adjusts the horizontality of the end face of the flange shaft (4), and adjusts the angle between the rivet head (7) and the axis of the wheel hub bearing (1) to 30°; C. Pre-positioning: the linear module (6) moves downward, the positioning frame (11) contacts the outer ring flange (3), the elastic member remains in a compressed state, and the rivet head (7) contacts the end of the hollow shaft; D. Rotary riveting and flanging: the rotating mechanism (10) is activated to drive the lower die frame (9) to drive the flange shaft (4) to rotate, and the flange shaft (4) drives the rivet head (7) to rotate accordingly. The rivet head (7) rolls on the inner wall of the hollow shaft, and the linear die set (6) continues to move downward. The end of the hollow shaft is opened and radially expanded by the rivet head (7) until the rivet head (7) reaches a predetermined pressure, thereby forming a flanging (5); E. Inspection: The transport mechanism (35) transports the hub bearing (1) with flanged edges to the inspection mechanism (20), and the inspection head (23) moves downward to inspect the thickness of the vertical edge and the flatness of the horizontal edge of the flange (5).

6. The processing technology of a rotary riveting machine according to claim 5, characterized in that: In step C, the downward pressure of the linear module (6) is 200 kg and the feed rate is 10 mm; in step D, the rotation speed of the rotating mechanism (10) is 400-600 rpm, the downward pressure of the linear module (6) is 5 t, and the feed rate of the linear module (6) is 5 mm. After the flange (5) is formed, the rotating mechanism (10) continues to operate so that the rivet head (7) rolls the end of the hollow shaft for 4-5 seconds, and then maintains the pressure for 1 second after rolling to control the elastic recovery of the flange (5) to reduce the radial and axial clearances between the hub bearings (1).

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