Automatic rivet screening device

Abstract

An automatic rivet screening device comprises a vibration supporting device, an extrusion clamping device and a synchronous screening device, the synchronous screening device is fixedly arranged on the vibration supporting device and comprises a rod portion screening mechanism and a rod cap screening mechanism, and the rod portion screening mechanism and the rod cap screening mechanism are arranged in a matched mode. The rod part screening mechanism is fixedly arranged on the vibration supporting device and used for screening rod part sizes of rivets, the rod cap screening mechanism is movably arranged on the rod part screening mechanism and used for screening rod cap sizes of the rivets, and the extrusion clamping device is fixedly arranged on the synchronous screening device and used for automatically and temporarily fixing the rivets meeting requirements. The synchronous screening device is arranged, synchronous screening operation of the rod part and the rod cap of the same rivet can be achieved, adaptive adjustment can be conducted according to the rivets of different specifications, screening of the rivets of various specifications is met, meanwhile, continuous screening work can be achieved, and the automatic production requirement is met.

Description

Technical Field

[0001] The invention belongs to the technical field of automatic screening equipment, and specifically refers to an automatic rivet screening device. Background Art

[0002] At present, rivets are widely used in automation equipment. In order to avoid failure of automation equipment, production personnel have very strict requirements on the size of rivets. However, due to the uneven quality of rivets produced by rivet production machines, there are many unqualified products, so further screening is needed.

[0003] The existing automatic rivet screening equipment is difficult to perform synchronous screening operations for the diameter sizes of the rivet rod and the rod cap, has low work efficiency, and is difficult to meet actual usage needs. In addition, the existing screening equipment is difficult to meet the screening of rivets of various specifications and has poor versatility. Summary of the invention

[0004] In order to overcome some of the problems mentioned in the above background, the present invention provides an automatic rivet screening device.

[0005] According to the technical solution of the present invention, there is provided an automatic rivet screening device, comprising a vibration support device, an extrusion clamping device and a synchronous screening device; Wherein, the synchronous screening device is fixedly arranged on the vibration support device, and is used for synchronous screening of the rod and the rod cap of the rivet. The synchronous screening device includes a rod screening mechanism and a rod cap screening mechanism, and the rod screening mechanism and the rod cap screening mechanism are arranged in coordination. The rod screening mechanism is fixedly arranged on the vibration support device, and is used for screening the rod size of the rivet. The rod cap screening mechanism is movably arranged on the rod screening mechanism, and is used for screening the rod cap size of the rivet. The extrusion clamping device is fixedly arranged on the synchronous screening device, and is used for automatically and temporarily fixing the rivets that meet the requirements.

[0006] Further, the rod screening mechanism includes a first rod screening assembly and a second rod screening assembly, the first rod screening assembly and the second rod screening assembly have the same structure, the first rod screening assembly is fixedly arranged on the vibration support device, and the second rod screening assembly is slidably arranged on the first rod screening assembly, the first rod screening assembly includes a mounting plate, the mounting plate on the first rod screening assembly is fixedly arranged on the vibration support device, a first mounting ring is fixedly arranged on the inner side wall of the mounting plate, a second guide rod is fixedly arranged on the outer side wall of the mounting plate, a first screening ring is rotatably arranged on the first mounting ring, a first drive chain is fixedly arranged on the inner side wall of the first screening ring, a first drive motor is fixedly arranged on the outer side wall of the mounting plate, a power output shaft of the first drive motor passes through the mounting plate, a first drive sprocket is fixedly arranged on the power output shaft of the first drive motor, and the first drive sprocket is power-coordinated with the first drive chain.

[0007] Furthermore, the synchronous screening device also includes a first guide rod and a first adjusting cylinder, the first guide rod is symmetrically arranged about the center plane of the mounting plate, the first guide rod is fixedly arranged on the mounting plate of the first rod screening assembly, the mounting plate of the second rod screening assembly is slidably arranged on the first guide rod, the first adjusting cylinder is fixedly arranged on the mounting plate of the second rod screening assembly, the protruding end of the first adjusting cylinder is arranged through the mounting plate of the second rod screening assembly, and the protruding end of the first adjusting cylinder is fixedly arranged on the mounting plate of the first rod screening assembly.

[0008] Further, the rod cap screening mechanism includes a first rod cap screening assembly and a second rod cap screening assembly, the first rod cap screening assembly and the second rod cap screening assembly are respectively slidably arranged on the first rod screening assembly and the second rod screening assembly, the first rod cap screening assembly and the second rod cap screening assembly have the same structure, the first rod cap screening assembly and the second rod cap screening assembly are cooperatively arranged, the first rod cap screening assembly includes a fixed plate, the fixed plate is slidably arranged on the second guide rod, a second adjusting cylinder is fixedly arranged on the outer side wall of the fixed plate, the protruding end of the second adjusting cylinder is fixedly arranged on the mounting plate of the first rod screening assembly, a second mounting ring is fixedly arranged on the fixed plate, and a second screening ring is rotatably arranged on the second mounting ring.

[0009] Further, the extrusion clamping device includes a first clamping mechanism and a second clamping mechanism, the first clamping mechanism and the second clamping mechanism have the same structure, the first clamping mechanism and the second clamping mechanism are respectively arranged on the first rod screening assembly and the second rod screening assembly, the first clamping mechanism and the second clamping mechanism are arranged in coordination, the first clamping mechanism includes a third mounting ring and a second driving motor, the third mounting ring is fixedly arranged on the mounting plate of the first rod screening assembly, a clamping ring is rotatably arranged on the third mounting ring, a second driving chain is fixedly arranged on the inner side wall of the clamping ring, the second driving motor is fixedly arranged on the mounting plate of the first rod screening assembly, a second driving sprocket is fixedly arranged on the power output shaft of the second driving motor, and the second driving sprocket is power-coordinated with the second driving chain.

[0010] Furthermore, a loading baffle is fixedly provided on the second mounting ring, and there are two groups of loading baffles, which are symmetrically arranged about the center plane of the rod cap screening mechanism; a movable baffle is fixedly provided on one group of loading baffles, and the movable baffle is symmetrically arranged about the center plane of the loading baffles, and the other end of the movable baffle is slidably provided on the other group of loading baffles.

[0011] Furthermore, the vibration support device includes a support frame and a vibration plate, the vibration plate is fixedly connected to the mounting plate on the first rod screening assembly, a sliding rod and a vibrator are fixedly arranged on the bottom wall of the vibration plate, the sliding rod is provided in multiple groups, the multiple groups of sliding rods are respectively slidably arranged on the support frame, and the multiple groups of sliding rods are respectively provided with reset springs.

[0012] Furthermore, an active push plate is fixedly provided on the first screening ring, and the active push plate is provided in multiple groups; a force-bearing plate is fixedly provided on the second screening ring, and the force-bearing plate is provided in multiple groups, and the multiple groups of active push plates are respectively matched with the multiple groups of force-bearing plates.

[0013] Furthermore, the first screening ring, the second screening ring and the clamping ring are all made of elastic rubber material.

[0014] Compared with the prior art, the beneficial effects of the present invention are: (1) The synchronous screening device provided in the present invention can realize the synchronous screening operation of the stem and the stem cap of the same rivet, greatly improving the work efficiency, and can make adaptive adjustments for rivets of different specifications to be screened to meet the screening operation of rivets of various specifications, and can realize continuous screening work to meet the needs of automated production; (2) The extrusion clamping device provided in the present invention can automatically temporarily fix the rivets that meet the requirements, so that the unqualified rivets can quickly fall and be collected under the action of gravity and vibration, and loosen the qualified rivets at the set position to complete the collection of qualified rivets. Qualified and unqualified products can be quickly distinguished, thereby improving screening efficiency and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 It is a schematic diagram of the overall structure of another angle of an embodiment of the present invention; Figure 3 is an overall cross-sectional view of an embodiment of the present invention; Figure 4 A cross-sectional view of a first direction of an extrusion clamping device and a synchronous screening device according to an embodiment of the present invention; Figure 5 A cross-sectional view of the extrusion clamping device and the synchronous screening device in the second direction according to an embodiment of the present invention; Figure 6 It is a cross-sectional view of the extrusion clamping device and the synchronous screening device in the third direction according to an embodiment of the present invention.

[0016] Among them, 1. a vibration support device, 2. an extrusion clamping device, 3. a synchronous screening device, 4. a rod screening mechanism, 5. a rod cap screening mechanism, 6. a first rod screening assembly, 7. a second rod screening assembly, 8. a mounting plate, 9. a first mounting ring, 10. a second guide rod, 11. a first screening ring, 12. a first drive chain, 13. a first drive motor, 14. a first drive sprocket, 15. a first guide rod, 16. a first adjustment cylinder, 17. a first rod cap screening assembly, 18. a second rod cap screening assembly Select components, 19, fixed plate, 20, second adjusting cylinder, 21, second mounting ring, 22, second screening ring, 23, first clamping mechanism, 24, second clamping mechanism, 25, third mounting ring, 26, second drive motor, 27, clamping ring, 28, second drive chain, 29, second drive sprocket, 30, loading baffle, 31, movable baffle, 32, support frame, 33, vibration plate, 34, sliding rod, 35, vibrator, 36, reset spring, 37, active push plate, 38, force plate. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection.

[0018] In the description of the embodiments, it should be understood that terms such as "up", "down", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the embodiments.

[0019] The existing automatic rivet screening equipment is difficult to perform synchronous screening operations for the diameter sizes of the rivet rod and the rod cap, has low work efficiency, and is difficult to meet actual usage needs. In addition, the existing screening equipment is difficult to meet the screening of rivets of various specifications and has poor versatility.

[0020] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, an embodiment of the present invention provides an automatic rivet screening device, including a vibration support device 1, an extrusion clamping device 2 and a synchronous screening device 3.

[0021] Among them, the synchronous screening device 3 is fixedly arranged on the vibration support device 1, and is used for the synchronous screening operation of the rod and the rod cap of the rivet. It can realize the synchronous screening operation of the rod and the rod cap of the same rivet. Only when the rod and the rod cap meet the size requirements at the same time can they pass the screening, which greatly improves the work efficiency, and can make adaptive adjustments for rivets of different specifications to be screened to meet the screening operation of rivets of various specifications. At the same time, continuous screening work can be realized to meet the needs of automated production. The synchronous screening device 3 includes a rod screening mechanism 4 and a rod cap screening mechanism 5. The rod screening mechanism 4 and the rod cap screening mechanism 5 are arranged in coordination. The rod screening mechanism 4 is fixedly arranged on the vibration support device 1, and is used for screening the rod size of the rivet. It can screen out the rivets whose rod size does not meet the set requirements, thereby improving the product quality. The rod cap screening mechanism 5 is movably arranged on the rod screening mechanism 4, and is used for screening the rod cap size of the rivet. It can screen out the rivets whose rod cap size does not meet the set requirements, thereby ensuring the product quality.

[0022] The extrusion clamping device 2 is fixedly arranged on the synchronous screening device 3, and is used to automatically temporarily fix the rivets that meet the requirements, so that the unqualified rivets can quickly fall and be collected under the action of gravity and vibration, and the qualified rivets are loosened at the set position to complete the collection of qualified rivets. Qualified and unqualified products can be quickly distinguished, thereby improving screening efficiency and accuracy.

[0023] like Figure 1 , Figure 2, Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, in some embodiments, the rod screening mechanism 4 includes a first rod screening assembly 6 and a second rod screening assembly 7, the first rod screening assembly 6 and the second rod screening assembly 7 have the same structure, the first rod screening assembly 6 is fixedly arranged on the vibration support device 1, and the second rod screening assembly 7 is slidably arranged on the first rod screening assembly 6, the first rod screening assembly 6 includes a mounting plate 8, the mounting plate 8 on the first rod screening assembly 6 is fixedly arranged on the vibration support device 1, a first mounting ring 9 is fixedly arranged on the inner side wall of the mounting plate 8, a second guide rod 10 is fixedly arranged on the outer side wall of the mounting plate 8, and a first mounting ring 9 is rotated on the first mounting ring 9. A first screening ring 11 is dynamically provided, and the first screening ring 11 rotates with the first mounting ring 9 as a motion trajectory. A first driving chain 12 is fixedly provided on the inner wall of the first screening ring 11, and a first driving motor 13 is fixedly provided on the outer wall of the mounting plate 8. The power output shaft of the first driving motor 13 penetrates the mounting plate 8, and a first driving sprocket 14 is fixedly provided on the power output shaft of the first driving motor 13. The first driving sprocket 14 is power-coordinated with the first driving chain 12. The first driving motor 13 can drive the first screening ring 11 to rotate through the cooperation of the first driving sprocket 14 and the first driving chain 12.

[0024] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, in some embodiments, the synchronous screening device 3 also includes a first guide rod 15 and a first adjusting cylinder 16. The first guide rod 15 is symmetrically arranged about the central plane of the mounting plate 8. The first guide rod 15 is fixedly arranged on the mounting plate 8 of the first rod screening assembly 6. The mounting plate 8 of the second rod screening assembly 7 is slidably arranged on the first guide rod 15. The first adjusting cylinder 16 is fixedly arranged on the mounting plate 8 of the second rod screening assembly 7. The protruding end of the first adjusting cylinder 16 is arranged through the mounting plate 8 of the second rod screening assembly 7. The protruding end of the first adjusting cylinder 16 is fixedly arranged on the mounting plate 8 of the first rod screening assembly 6.

[0025] The first adjusting cylinder 16 can drive the second rod screening assembly 7 to slide on the first guide rod 15, and then the relative position between the first rod screening assembly 6 and the second rod screening assembly 7 can be adjusted, and the gap between the two groups of first screening rings 11 on the rod screening mechanism 4 can be adjusted. The rod of the rivet that meets the set size requirements can pass through the gap between the two groups of first screening rings 11, thereby completing the screening operation of the rod.

[0026] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, in some embodiments, the rod cap screening mechanism 5 includes a first rod cap screening assembly 17 and a second rod cap screening assembly 18, which are respectively slidably arranged on the first rod screening assembly 6 and the second rod screening assembly 7, and the first rod cap screening assembly 17 and the second rod cap screening assembly 18 have the same structure. The first rod cap screening assembly 17 and the second rod cap screening assembly 18 are arranged in coordination, and the first rod cap screening assembly 17 includes a fixed plate 19, which is slidably arranged on the second guide rod 10, and a second adjusting cylinder 20 is fixedly arranged on the outer wall of the fixed plate 19, and the protruding end of the second adjusting cylinder 20 is fixedly arranged on the mounting plate 8 of the first rod screening assembly 6, a second mounting ring 21 is fixedly arranged on the fixed plate 19, and a second screening ring 22 is rotatably arranged on the second mounting ring 21.

[0027] The second screening ring 22 rotates with the second mounting ring 21 as the motion trajectory, and the second screening rings 22 on the first rod cap screening assembly 17 and the second rod cap screening assembly 18 cooperate with each other to screen the rod cap size of the rivet through the gap between the two groups of second screening rings 22. The rod cap that meets the requirements can fall into the gap between the two groups of second screening rings 22 to achieve the screening of the rod cap size, and the relative position of the mounting plate 8 can be adjusted by the second adjusting cylinder 20, and then the gap between the two groups of second screening rings 22 can be adjusted to meet the screening requirements of rivets of different specifications.

[0028] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, in some embodiments, the extrusion clamping device 2 includes a first clamping mechanism 23 and a second clamping mechanism 24, the first clamping mechanism 23 and the second clamping mechanism 24 have the same structure, the first clamping mechanism 23 and the second clamping mechanism 24 are respectively arranged on the first rod screening assembly 6 and the second rod screening assembly 7, the first clamping mechanism 23 and the second clamping mechanism 24 are arranged in coordination, the first clamping mechanism 23 includes a third mounting ring 25 and a second drive motor 26, the third mounting ring 25 is fixedly arranged on the mounting plate 8 of the first rod screening assembly 6, a clamping ring 27 is rotatably arranged on the third mounting ring 25, the width of the clamping ring 27 is greater than the width of the first screening ring 11, a second drive chain 28 is fixedly arranged on the inner side wall of the clamping ring 27, the second drive motor 26 is fixedly arranged on the mounting plate 8 of the first rod screening assembly 6, a second drive sprocket 29 is fixedly arranged on the power output shaft of the second drive motor 26, and the second drive sprocket 29 is power-coordinated with the second drive chain 28.

[0029] The second drive motor 26 drives the clamping ring 27 to rotate synchronously with the first screening ring 11 through the cooperation of the second drive sprocket 29 and the second drive chain 28. At the same time, since the width of the clamping ring 27 is greater than the width of the first screening ring 11, the gap between the two groups of clamping rings 27 is smaller than the gap between the two groups of first screening rings 11. Through the mutual cooperation of the two groups of clamping rings 27, the rod part that falls through the gap between the two groups of first screening rings 11 can be squeezed and clamped, and the qualified rivets can be temporarily and automatically clamped and fixed. As the first screening ring 11 drives the rivets to move, unqualified rivets will fall under the action of gravity, and qualified rivets will fall at another position as they leave the clamping range of the extrusion and clamping device 2, completing the screening and sorting operations.

[0030] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, in some embodiments, a loading baffle 30 is fixedly provided on the second mounting ring 21, and two groups of loading baffles 30 are provided. The two groups of loading baffles 30 are symmetrically arranged about the central plane of the rod cap screening mechanism 5, and a movable baffle 31 is fixedly provided on one group of loading baffles 30. The movable baffle 31 is symmetrically arranged about the central plane of the loading baffle 30, and the other end of the movable baffle 31 is slidably provided on the other group of loading baffles 30. The loading baffle 30 and the movable baffle 31 together constitute a loading cavity, and the rivets to be screened enter the synchronous screening device 3 through the loading cavity.

[0031] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, in some embodiments, the vibration support device 1 includes a support frame 32 and a vibration plate 33, the vibration plate 33 is fixedly connected to the mounting plate 8 on the first rod screening assembly 6, and a sliding rod 34 and a vibrator 35 are fixedly arranged on the bottom wall of the vibration plate 33. The sliding rod 34 is provided with multiple groups, and the multiple groups of sliding rods 34 are respectively slidably arranged on the support frame 32. The multiple groups of sliding rods 34 are respectively provided with reset springs 36. The vibrator 35 can drive the mounting plate 8 to vibrate on the support frame 32, thereby driving the synchronous screening device 3 connected to the vibration plate 33 to vibrate, which can speed up the screening operation of rivets.

[0032] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, in some embodiments, an active push plate 37 is fixedly provided on the first screening ring 11, and multiple groups of active push plates 37 are provided. A force plate 38 is fixedly provided on the second screening ring 22, and multiple groups of force plates 38 are provided. Multiple groups of active push plates 37 are respectively matched with multiple groups of force plates 38. The active push plates 37 push the force plates 38 to drive the second screening ring 22 to rotate on the second mounting ring 21, and then the rivets are driven to move synchronously under the action of friction force.

[0033] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, in some embodiments, the first screening ring 11, the second screening ring 22 and the clamping ring 27 are all made of elastic rubber material, can rotate under power actuation, and can avoid rivet damage during the screening process.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A rivet automatic screening device, characterized in that: It comprises a vibration support device (1), a squeezing and clamping device (2) and a synchronous screening device (3); The synchronous screening device (3) is fixedly mounted on the vibration support device (1) and is used for synchronous screening of the rivet rod and the rod cap. The synchronous screening device (3) comprises a rod screening mechanism (4) and a rod cap screening mechanism (5). The rod screening mechanism (4) and the rod cap screening mechanism (5) are arranged in coordination. The rod screening mechanism (4) is fixedly mounted on the vibration support device (1) and is used for screening the size of the rivet rod. The rod cap screening mechanism (5) is movably mounted on the rod screening mechanism (4) and is used for screening the size of the rivet rod cap. The extrusion clamping device (2) is fixedly arranged on the synchronous screening device (3) and is used to automatically and temporarily fix rivets that meet the requirements.

2. The automatic rivet screening device according to claim 1 is characterized in that: The rod screening mechanism (4) comprises a first rod screening assembly (6) and a second rod screening assembly (7), the first rod screening assembly (6) and the second rod screening assembly (7) having the same structure, the first rod screening assembly (6) being fixedly arranged on the vibration support device (1), the second rod screening assembly (7) being slidably arranged on the first rod screening assembly (6), the first rod screening assembly (6) comprising a mounting plate (8), the mounting plate (8) on the first rod screening assembly (6) being fixedly arranged on the vibration support device (1), and a first mounting ring (9) being fixedly arranged on the inner side wall of the mounting plate (8) ), a second guide rod (10) is fixedly arranged on the outer wall of the mounting plate (8), a first screening ring (11) is rotatably arranged on the first mounting ring (9), a first driving chain (12) is fixedly arranged on the inner wall of the first screening ring (11), a first driving motor (13) is fixedly arranged on the outer wall of the mounting plate (8), a power output shaft of the first driving motor (13) passes through the mounting plate (8), a first driving sprocket (14) is fixedly arranged on the power output shaft of the first driving motor (13), and the first driving sprocket (14) is arranged in power cooperation with the first driving chain (12).

3. The automatic rivet screening device according to claim 2 is characterized in that: The synchronous screening device (3) further comprises a first guide rod (15) and a first adjustment cylinder (16); the first guide rod (15) is symmetrically arranged about the central plane of the mounting plate (8); the first guide rod (15) is fixedly arranged on the mounting plate (8) of the first rod screening assembly (6); the mounting plate (8) of the second rod screening assembly (7) is slidably arranged through the first guide rod (15); the first adjustment cylinder (16) is fixedly arranged on the mounting plate (8) of the second rod screening assembly (7); the protruding end of the first adjustment cylinder (16) is arranged through the mounting plate (8) of the second rod screening assembly (7); and the protruding end of the first adjustment cylinder (16) is fixedly arranged on the mounting plate (8) of the first rod screening assembly (6).

4. The automatic rivet screening device according to claim 3 is characterized in that: The rod cap screening mechanism (5) comprises a first rod cap screening assembly (17) and a second rod cap screening assembly (18), the first rod cap screening assembly (17) and the second rod cap screening assembly (18) being slidably arranged on the first rod screening assembly (6) and the second rod screening assembly (7) respectively, the first rod cap screening assembly (17) and the second rod cap screening assembly (18) having the same structure, the first rod cap screening assembly (17) and the second rod cap screening assembly (18) being arranged in coordination, the first rod cap screening assembly (17) comprising a fixing plate (19), the fixing plate (19) being slidably arranged on the second guide rod (10), a second adjusting cylinder (20) being fixedly arranged on the outer side wall of the fixing plate (19), the protruding end of the second adjusting cylinder (20) being fixedly arranged on the mounting plate (8) of the first rod screening assembly (6), a second mounting ring (21) being fixedly arranged on the fixing plate (19), and a second screening ring (22) being rotatably arranged on the second mounting ring (21).

5. The automatic rivet screening device according to claim 4 is characterized in that: The extrusion clamping device (2) comprises a first clamping mechanism (23) and a second clamping mechanism (24), the first clamping mechanism (23) and the second clamping mechanism (24) having the same structure, the first clamping mechanism (23) and the second clamping mechanism (24) being respectively arranged on the first rod screening assembly (6) and the second rod screening assembly (7), the first clamping mechanism (23) and the second clamping mechanism (24) being arranged in coordination, the first clamping mechanism (23) comprising a third mounting ring (25) and a second drive motor (26), the third mounting ring (25 ) is fixedly arranged on the mounting plate (8) of the first rod screening assembly (6), a clamping ring (27) is rotatably arranged on the third mounting ring (25), a second driving chain (28) is fixedly arranged on the inner side wall of the clamping ring (27), the second driving motor (26) is fixedly arranged on the mounting plate (8) of the first rod screening assembly (6), a second driving sprocket (29) is fixedly arranged on the power output shaft of the second driving motor (26), and the second driving sprocket (29) and the second driving chain (28) are arranged in power cooperation.

6. The automatic rivet screening device according to claim 5 is characterized in that: A loading baffle (30) is fixedly provided on the second mounting ring (21), and two groups of the loading baffles (30) are provided. The two groups of the loading baffles (30) are symmetrically arranged about the central plane of the rod cap screening mechanism (5). A movable baffle (31) is fixedly provided on one group of the loading baffles (30), and the movable baffle (31) is symmetrically arranged about the central plane of the loading baffles (30). The other end of the movable baffle (31) is slidably provided on the other group of the loading baffles (30).

7. The automatic rivet screening device according to claim 6 is characterized in that: The vibration support device (1) comprises a support frame (32) and a vibration plate (33), wherein the vibration plate (33) is fixedly connected to a mounting plate (8) on the first rod screening assembly (6), and a sliding rod (34) and a vibrator (35) are fixedly arranged on the bottom wall of the vibration plate (33), wherein a plurality of groups of sliding rods (34) are provided, and the plurality of groups of sliding rods (34) are respectively slidably arranged on the support frame (32), and a return spring (36) is respectively arranged on the plurality of groups of sliding rods (34).

8. The automatic rivet screening device according to claim 7 is characterized in that: An active push plate (37) is fixedly provided on the first screening ring (11), and the active push plates (37) are provided in multiple groups. A force-bearing plate (38) is fixedly provided on the second screening ring (22), and the force-bearing plate (38) is provided in multiple groups. The multiple groups of active push plates (37) are respectively arranged in cooperation with the multiple groups of force-bearing plates (38).

9. The automatic rivet screening device according to claim 8 is characterized in that: The first screening ring (11), the second screening ring (22) and the clamping ring (27) are all made of elastic rubber material.

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