An automatic chamfering and marking device for nuts

Abstract

This invention discloses an automatic chamfering and marking device for nuts. The nut transfer device includes a circular plate-shaped central transfer seat and a rotary drive mechanism for driving the central transfer seat to rotate intermittently at equal 90-degree angles. Four nut claws are evenly distributed circumferentially on the cylindrical surface of the central transfer seat. A feeding device, a chamfering device, a marking device, and a finished product collection device are evenly distributed circumferentially around the rotation axis of the central transfer seat. The feeding device transfers nuts to the corresponding nut claws. The chamfering device chamfers the upper and lower end faces of the nuts on the corresponding nut claws. The marking device marks the upper end face of the nuts on the corresponding nut claws. The finished product collection device collects nuts that have been released from the corresponding nut claws. This invention eliminates the need for manual transfer and two feeding cycles to complete chamfering and marking, significantly improving nut production efficiency.

Description

Technical Field

[0001] This invention relates to the field of hexagonal nut processing, and in particular to an automatic chamfering and marking device for nuts. Background Technology

[0002] At the end of production, hexagonal nuts need to be chamfered to prevent sharp corners from injuring users during subsequent use. The chamfering of hexagonal nuts is done using a chamfering machine. Additionally, size and price markings need to be engraved on one end face of the hexagonal nut for easy classification and purchase. The marking is done using a marking machine.

[0003] Regarding the aforementioned technologies, the inventors believe that the following defects exist: Since marking is a process following chamfering, and the chamfering machine and marking machine are located separately, after the hexagonal nuts are chamfered, they need to be manually transferred to the marking machine, which then marks them after loading. This greatly reduces the production efficiency of hexagonal nuts. Summary of the Invention

[0004] To improve the production efficiency of hexagonal nuts, this invention provides an automatic chamfering and marking device for nuts.

[0005] The automatic chamfering and marking equipment for nuts provided by this invention adopts the following technical solution:

[0006] An automatic chamfering and marking device for nuts includes a nut transfer device, a feeding device, a chamfering device, a marking device, and a finished product collection device. The nut transfer device comprises a circular plate-shaped central transfer seat and a rotary drive mechanism for driving the central transfer seat to rotate intermittently at equal 90-degree angles. Four nut grippers are evenly distributed circumferentially on the cylindrical surface of the central transfer seat. The feeding device, the chamfering device, the marking device, and the finished product collection device are evenly distributed circumferentially around the rotation axis of the central transfer seat. When the central transfer seat stops rotating, the four nut grippers are respectively facing the feeding device, the chamfering device, the marking device, and the finished product collection device. The feeding device transfers nuts to the facing nut grippers. The chamfering device chamfers the upper and lower end faces of the nuts on the facing nut grippers. The marking device marks the upper end face of the nuts on the facing nut grippers. The finished product collection device collects nuts that have been released from the facing nut grippers.

[0007] By adopting the above technical solution, the nut is fed into the nut chuck by the feeding device, and then passes through the chamfering device and the marking device in sequence under the drive of the central transfer seat that rotates intermittently at ninety-degree angles, and finally reaches the finished product collection device. In this way, chamfering and marking can be completed without manual transfer and two feedings, which greatly improves the production efficiency of the nut.

[0008] Optionally, the feeding device includes a feeding bracket, a vertical feeding mechanism, and a nut rotation positioning mechanism; the feeding bracket has a U-shaped side bracket with an opening facing away from the central transfer seat on its end face near the central transfer seat; a limit lifting bracket is provided directly below the side bracket; the nut rotation positioning mechanism includes a central lifting seat vertically lifted directly below the side bracket, a rotation limit drive plate horizontally movable on the side wall of the side bracket with an opening away from the feeding bracket, and a nut horizontal limit plate vertically and horizontally movable on the other two side walls of the side bracket; the central... A cylindrical central through rod is formed on the upper surface of the lifting seat; the diameter of the central through rod is the same as the inner diameter of the nut; the vertical feeding mechanism is used to fit the nut onto the central through rod; the distance between the end face of the rotary limiting drive plate near the feeding bracket and the rotation center axis of the central through rod is half the distance between a pair of opposite end faces of the nut; the limiting lifting bracket is provided with a limiting lifting assembly for driving the central lifting seat; the side bracket is provided with a rotary limiting assembly for driving the rotary limiting drive plate and a horizontal limiting assembly for driving the horizontal limiting plate of the nut.

[0009] By adopting the above technical solution, the nut is placed on the central through rod by the vertical feeding mechanism and finally supported by a pair of nut horizontal limiting plates that are close to each other. At this time, the rotary limiting drive plate moves horizontally. Since the distance between the end face of the rotary limiting drive plate close to the feeding bracket and the rotation center axis of the central through rod is half the distance between the opposite end faces of the nut, the nut rotates during the movement of the rotary limiting drive plate and eventually one of its end faces makes parallel contact with the rotary limiting drive plate. This makes the position of the nut on the nut claws determined, which is convenient for subsequent chamfering and marking, and helps to improve the production efficiency of the nut and the quality of chamfering and marking.

[0010] Optionally, the rotation limiting assembly includes a limiting support plate parallel to the rotation limiting drive plate; the rotation limiting drive plate is located between the limiting support plate and the central through rod; the distance between the limiting support plate and the rotation limiting drive plate is adjustable.

[0011] By adopting the above technical solution, the distance between the rotating limit drive plate and the center through rod can be adjusted by adjusting the distance between the limiting support plate and the rotating limit drive plate. This helps to ensure that the nut falls in a fixed state, which is convenient for subsequent chamfering and marking, and helps to improve the production efficiency of the nut and the quality of chamfering and marking.

[0012] Optionally, the nut claw includes a pair of claw plates that move away from or towards each other synchronously; the end faces of the pair of claw plates that are close to each other are respectively formed with limiting grooves; when the pair of claw plates are close to each other, the pair of limiting grooves form a regular hexagonal groove with the same shape as the nut; the side walls of the pair of limiting grooves of the nut claw facing the feeding device near the central transfer seat are respectively vertically flush with the end face of the rotary limiting drive plate near the feeding bracket.

[0013] By adopting the above technical solution, since the sidewalls of the pair of limiting slots of the nut claws facing the feeding device are vertically aligned with the end face of the rotary limiting drive plate near the feeding bracket, when the nut falls along the central through rod, it can accurately enter between the pair of limiting slots under the guidance of the rotary limiting drive plate. This ensures the positional stability of the nut throughout the entire processing and transfer process, facilitates subsequent chamfering and marking, and helps improve nut production efficiency and the quality of chamfering and marking.

[0014] Optionally, the vertical feeding mechanism includes a vibratory feeder fixed to the upper surface of the feeding bracket; the discharge end of the vibratory feeder is provided with a discharge guide groove; the end of the discharge guide groove away from the vibratory feeder is horizontally arranged and has a discharge hole with openings at the top and bottom; the discharge hole is located directly above the central through rod; the end of the discharge guide groove away from the vibratory feeder is closed; a closing plate for opening and closing the discharge hole is horizontally movable on the lower side of the discharge guide groove; a horizontal drive assembly is provided on the feeding bracket; the horizontal drive assembly is used to drive the closing plate.

[0015] By adopting the above technical solution, the vibratory feeder allows the nuts to enter and be arranged in the feeding guide groove in sequence. When feeding is required, the horizontal drive component drives the sealing plate to open the feeding hole horizontally, so that the foremost nut is vertically sleeved on the central through rod below it. This makes feeding convenient and helps to improve the nut production efficiency.

[0016] Optionally, the chamfering device includes a chamfering bracket, a pair of chamfering drive seats vertically and movably disposed on the chamfering bracket, and a chamfering drive mechanism for driving the pair of chamfering drive seats to move away from each other synchronously; a chamfering motor is fixed on the end faces of the pair of chamfering drive seats that are close to each other; and a chamfering cutter head is fixed on the output shaft of the chamfering motor.

[0017] By adopting the above technical solution, the chamfering drive mechanism drives a pair of chamfering drive seats to move closer to each other. In this way, a pair of chamfering cutters, driven by a pair of chamfering motors, simultaneously chamfer the upper and lower end faces of the nut, thereby improving the production efficiency of the nut.

[0018] Optionally, the marking device includes a marking bracket, a marking support seat vertically movable on the marking bracket, and a marking head; the marking head is located directly above the marking support seat; the nut held by the nut claw facing the marking device is located between the marking head and the marking support seat.

[0019] By adopting the above technical solution, after the nut is in place, the nut claws inside the nut hold it in place. Then, the marking support rises and abuts against the lower end of the nut. Next, the marking head descends to mark the upper surface of the nut. In this way, the nut position is stable when marking the nut, which is conducive to improving the marking quality.

[0020] Optionally, the marking bracket is provided with an air jet assembly; the air jet assembly is located directly above the nut held by the nut claws of the marking device and is used to blow away metal debris from the upper surface of the nut.

[0021] By adopting the above technical solution, before marking, the jet assembly is activated to blow air onto the upper surface of the nut to remove metal debris, thus preventing metal debris from being located at the marking position and affecting the marking quality.

[0022] Optionally, the finished product collection device includes a finished product collection box with an open top; four rectangularly distributed rollers are provided on the bottom surface of the finished product collection box.

[0023] By adopting the above technical solution, after the nut is processed, it falls from top to bottom into the finished product collection box, which can be transferred by the rollers underneath.

[0024] Optionally, a pair of limiting guide rails for the roller to slide are provided directly below the nut claw of the finished product collection device; the limiting guide rails are directly opposite the nut transfer device.

[0025] By adopting the above technical solution, the finished product collection box can accurately reach the working position under the guidance of the limiting guide rail, and the limiting guide rail can also prevent the finished product collection box from moving accidentally.

[0026] In summary, the beneficial effects of the present invention are as follows:

[0027] 1. Chamfering and marking can be completed without manual transfer and two loading processes, greatly improving the production efficiency of nuts.

[0028] 2. It ensures the positional stability of the nut throughout the entire processing and transfer process, facilitates subsequent chamfering and marking, and helps improve nut production efficiency and the quality of chamfering and marking. Attached Figure Description

[0029] Figure 1 This is a frontal structural schematic diagram of the present invention.

[0030] Figure 2 This is a top view of the structure of the present invention.

[0031] Figure 3 This is the invention Figure 2 A schematic diagram of the cross-section of AA.

[0032] Figure 4 This is a top view of the structure of the central transfer seat 13 of the present invention.

[0033] Figure 5 This is the invention Figure 3 A magnified schematic diagram of part B in the diagram.

[0034] Figure 6 This is a front view structural schematic diagram of the chamfering device 30 of the present invention.

[0035] Figure 7 This is the invention Figure 6 A schematic diagram of the cross-section of CC.

[0036] Figure 8 This is a schematic diagram illustrating the working principle of the nut 60 rotational positioning of the present invention.

[0037] Explanation of reference numerals in the attached figures:

[0038] 10. Nut transfer device; 11. Nut transfer base; 12. Transfer drive motor; 13. Central transfer seat; 14. Nut chuck; 141. Chuck plate; 1410. Limiting groove;

[0039] 20. Feeding bracket; 211. Vertical support plate; 212. Side bracket; 2120. Rotary limiting translation groove; 22. Vibratory feeder; 23. Discharge guide groove; 230. Discharge hole; 24. Limiting lifting bracket; 25. Enclosed plate; 251. Horizontal drive seat; 252. Horizontal drive cylinder; 26. Center through rod; 261. Center lifting seat; 262. Limiting lifting frame; 263. Limiting lifting cylinder; 27. Limiting support plate; 271. Limiting drive block; 272. Rotary limiting drive screw; 273. Rotary limiting drive motor; 28. Rotary limiting drive plate; 281. Horizontal guide column; 282. Adjusting bolt; 29. ​​Nut horizontal limiting plate; 291. Horizontal limiting cylinder;

[0040] 30. Chamfering device; 31. Chamfering base; 32. Chamfering upper frame; 33. Vertical guide plate; 34. Chamfering drive screw; 35. Chamfering drive seat; 36. Chamfering drive motor; 37. Chamfering motor; 38. Chamfering cutter head;

[0041] 40. Marking device; 41. Marking base; 42. Marking rack; 43. Support lifting cylinder; 44. Marking support seat; 45. Marking lifting cylinder; 46. Marking print head; 47. Air jet assembly;

[0042] 50. Finished product collection device; 51. Finished product collection box; 511. Rollers; 52. Limiting guide rail;

[0043] 60. Nuts. Detailed Implementation

[0044] The following is in conjunction with the appendix Figure 1-8 The present invention will be described in further detail below.

[0045] This application discloses an automatic chamfering and marking device for nuts, as shown in the reference. Figure 1 and Figure 2 The system includes a nut transfer device 10, a feeding device 20, a chamfering device 30, a marking device 40, and a finished product collection device 50. The feeding device 20, chamfering device 30, marking device 40, and finished product collection device 50 are distributed around the nut transfer device 10. The nut transfer device 10 is used to sequentially transfer the nuts 60 provided by the feeding device 20 to the chamfering device 30, the marking device 40, and the finished product collection device 50. The feeding device 20 is used to provide nuts 60 to the nut transfer device 10. The chamfering device 30 is used to chamfer the upper and lower end faces of the nuts 60. The marking device 40 is used to mark the upper end face of the nuts 60. The finished product collection device 50 is used to collect the processed nuts 60.

[0046] refer to Figures 1-4 The nut transfer device 10 includes a nut transfer base 11 and a rotary drive mechanism. The rotary drive mechanism is a transfer drive motor 12 fixed on the upper surface of the nut transfer base 11. The transfer drive motor 12 rotates intermittently at equal angles of 90 degrees. A circular plate-shaped central transfer seat 13 is fixed on the upper end of the output shaft of the transfer drive motor 12. Four nut claws 14 evenly distributed around the circumference are fixed on the cylindrical surface of the central transfer seat 13. The nut claws 14 are claw cylinders. The nut claws 14 include a pair of claw plates 141 that move away or closer together synchronously. Limiting grooves 1410 are formed on the end faces of the pair of claw plates 141 that are close to each other. When the pair of claw plates 141 are close to each other, the pair of limiting grooves 1410 form a regular hexagonal groove with the same shape as the nut 60. When the central transfer base 13 stops rotating, the four nut claws 14 are respectively facing the feeding device 20, the chamfering device 30, the marking device 40, and the finished product collection device 50.

[0047] refer to Figures 1-3 and Figure 5The feeding device 20 includes a feeding bracket 21, a vertical feeding mechanism, and a nut rotation and positioning mechanism; a side bracket 212 with an opening facing the feeding bracket 21 is formed on the end face of the feeding bracket 21 near the nut transfer device 10; a limit lifting bracket 24 is provided between the feeding bracket 21 and the nut transfer base 11; a vertical support plate 211 is formed on the upper end face of the feeding bracket 21.

[0048] refer to Figures 1-3 and Figure 5 The vertical feeding mechanism includes a vibratory plate 22 fixed on the upper surface of the feeding bracket 21; the discharge end of the vibratory plate 22 is provided with a discharge guide groove 23; the end of the discharge guide groove 23 away from the vibratory plate 22 is horizontally arranged and the bottom is formed with a discharge hole 230 with openings at the top and bottom; a horizontal drive assembly is fixed on the vertical support plate 211; the horizontal drive assembly is a horizontal drive cylinder 252; a horizontal drive seat 251 is fixed on the piston rod of the horizontal drive cylinder 252; a closing plate 25 for opening and closing the discharge hole 230 is fixed on the end face of the horizontal drive seat 251 away from the horizontal drive cylinder 252.

[0049] refer to Figures 1-3 and Figure 5 The nut rotation positioning mechanism includes a central lifting seat 261 that is vertically and vertically installed directly below the side support 212, a rotation limit drive plate 28 that is horizontally installed on the side wall of the side support 212 away from the opening of the side support 212, and a nut horizontal limit plate 29 that is vertically and horizontally installed on the other two side walls of the side support 212.

[0050] refer to Figures 1-3 and Figure 5 The limiting lifting bracket 24 is equipped with a limiting lifting assembly for driving the central lifting seat 261; the limiting lifting assembly is a limiting lifting cylinder 263; a limiting lifting frame 262 is fixed on the piston rod of the limiting lifting cylinder 263; the central lifting seat 261 is fixed on the upper end face of the limiting lifting frame 262; a cylindrical central through rod 26 is formed on the upper end face of the central lifting seat 261; the central through rod 26 is located directly below the material drop hole 230; the diameter of the central through rod 26 is the same as the inner diameter of the nut; the upper end of the central through rod 26 is formed from bottom to top. The truncated cone shape gradually decreases in size; the distance between the end face of the rotary limiting drive plate 28 near the feeding bracket 21 and the rotation center axis of the central through rod 26 is half the distance between the opposite pair of end faces of the nut 60; the two end faces of the rotary limiting drive plate 28 perpendicular to its moving direction are formed as semi-cylindrical surfaces arranged vertically in the axial direction; the pair of limiting slots 1410 of the nut claw 14 directly below the side bracket 212 are vertically flush with the side walls of the central transfer seat 13 near the end face of the rotary limiting drive plate 28 near the feeding bracket 21.

[0051] refer to Figures 1-3 and Figure 5 A rotation limiting assembly is provided on the side bracket 212; a rotation limiting translation groove 2120 is formed on the side wall of the side bracket 212 away from the loading bracket 21; the rotation limiting assembly includes a rotation limiting drive screw 272 and a limiting support plate 27; the rotation limiting drive screw 272 is pivotally connected between a pair of opposite side walls of the rotation limiting translation groove 2120 and is horizontally arranged; a rotation limiting drive motor 273 is fixed on the side bracket 212; one end of the rotation limiting drive screw 272 is fixedly connected to the output shaft of the rotation limiting drive motor 273; a limiting function that cooperates with the rotation limiting translation groove 2120 is formed on the end face of the limiting support plate 27 away from the loading bracket 21. A drive block 271 is screwed onto a rotary limit drive screw 272. A rotary limit drive plate 28 is disposed on the side of the limit support plate 27 near the feeding bracket 21. The upper ends of the rotary limit drive plate 28 and the limit support plate 27 extend beyond the upper end face of the side bracket 212, and the lower ends extend beyond the lower end face of the side bracket 212. A horizontal guide post 281 is formed at the lower end of the end face of the rotary limit drive plate 28 near the limit support plate 27. The horizontal guide post 281 passes horizontally through the lower end of the limit support plate 27. An adjusting bolt 282 is vertically screwed onto the upper end of the limit support plate 27. The end of the adjusting bolt 282 away from the head is pivotally connected to the upper end of the rotary limit drive plate 28.

[0052] refer to Figures 1-3 and Figure 5 A horizontal limiting component is fixed on the end face of a pair of horizontal parts that are far apart from each other, which are connected to the side bracket 212 and the feeding bracket 21; the horizontal limiting component is a horizontal limiting cylinder 291; the nut horizontal limiting plate 29 is L-shaped and lying on its side; the horizontal parts of the pair of nut horizontal limiting plates 29 are close to each other and the vertical parts are far apart from each other; the vertical parts of the pair of nut horizontal limiting plates 29 are respectively fixedly connected to the piston rods of the pair of horizontal limiting cylinders 291.

[0053] refer to Figure 5 and Figure 6The chamfering device 30 includes a chamfering bracket, a pair of vertically movably mounted chamfering drive seats 35 distributed vertically on the chamfering bracket, and a chamfering drive mechanism for driving the pair of chamfering drive seats 35 to move away from and towards each other synchronously; the chamfering bracket includes a chamfering base 31 and an inverted L-shaped chamfering upper frame 32 formed on the upper end face of the chamfering base 31; a pair of vertically mounted vertical guide plates 33 are formed on the vertical part of the chamfering upper frame 32 near the central transmission seat 13; a pair of vertical guide grooves for the vertical guide plates 33 to slide vertically are formed on the end face of the chamfering drive seats 35 away from the central transmission seat 13; the chamfering drive mechanism... The mechanism includes a chamfering drive screw 34 pivotally connected between the horizontal part of the chamfering upper frame 32 and the chamfering base 31, and a chamfering drive motor 36 fixed on the upper end face of the chamfering upper frame 32; the upper end of the chamfering drive screw 34 is fixedly connected to the output shaft of the chamfering drive motor 36; the upper and lower parts of the chamfering drive screw 34 are formed with external threads of opposite directions; a pair of chamfering drive seats 35 are screwed onto different external threaded parts of the chamfering drive screw 34; a chamfering motor 37 is fixed on the end faces of the pair of chamfering drive seats 35 that are close to each other; a chamfering cutter head 38 is fixed on the output shaft of the chamfering motor 37.

[0054] refer to Figures 1-3 The marking device 40 includes a marking bracket, a marking support seat 44 vertically movable on the marking bracket, and a marking head 46. The marking bracket includes a marking base 41 and an inverted L-shaped marking upper frame 42 formed on the upper surface of the marking base 41. A pair of supporting lifting cylinders 43 are fixed on the upper surface of the marking base 41. The marking support seat 44 is fixed to the upper end of the piston rod of the pair of supporting lifting cylinders 43. A marking lifting cylinder 45 is fixed on the upper surface of the marking upper frame 42. The marking head 46 is fixed to the lower end of the piston rod of the marking lifting cylinder 45. The marking head 46 is located directly above the marking support seat 44. The marking nut 60 is located between the marking head 46 and the marking support seat 44.

[0055] refer to Figure 3 A jet assembly 47 is provided on the lower end face of the marking frame 42; the jet assembly 47 is in the shape of a cylindrical ring; the jet assembly 47 is provided with several jet holes evenly distributed around the circumference; the bottom of the jet holes is inclined towards the upper end face of the nut 60; the jet assembly 47 is connected to an external air supply device and the gas supplied by the external air supply device is sprayed obliquely onto the upper end face of the nut 60 through the jet holes.

[0056] refer to Figure 1 and Figure 2 The finished product collection device 50 includes a finished product collection box 51 with an open top; four rectangular rollers 511 are fixed on the bottom surface of the finished product collection box 51; a pair of limiting guide rails 52 for the rollers 511 to slide on the ground are fixed on the ground; the limiting guide rails 52 are directly opposite the nut transmission device 10.

[0057] The working principle of the automatic chamfering and marking device for nuts in this application is as follows:

[0058] The vibratory feeder 22 arranges the nuts 60 sequentially in the feeding guide groove 23. At this time, the closing plate 25 closes the feeding hole 230, and a pair of nut horizontal limiting plates 29 move closer to each other. Then, the central lifting seat 261 rises, causing the upper end of the central through rod 26 to approach the closing plate 25. Next, the closing plate 25 moves horizontally to open the feeding hole 230, causing the foremost nut 60 on the closing plate 25 to fall vertically. During this process, the nut 60 is fitted onto the central through rod 26 and falls onto the pair of nut horizontal limiting plates 29. Then, the rotating limiting drive plate 28 moves horizontally as follows... Figure 8 As shown, during this process, the rotary limiting drive plate 28 drives the nut 60 to rotate around the central through rod 26 until one end face of the nut 60 contacts the rotary limiting drive plate 28 in parallel. Then, a pair of nut horizontal limiting plates 29 move away from each other. Thus, under the vertical guidance of the rotary limiting drive plate 28, the nut 60 falls along the central through rod 26 onto the central lifting seat 261. At this time, the nut 60 is located in the limiting slots 1410 of a pair of claw plates 141 of the nut claw 14. Then, the nut claw 14 drives the pair of claw plates 141 to approach and clamp the nut 60. Then, the central lifting seat 261 descends back to its original position, so that the central through rod 26 is lower than the nut 60, and the rotary limiting drive plate 28 rotates towards the central transmission seat 13. The nut 60 moves horizontally back to its original position in the opposite direction. Then, the central transfer seat 13 rotates 90 degrees so that the nut 60 reaches the chamfering device 30. The chamfering device 30 then chamfers the upper and lower end faces of the nut 60. Next, the central transfer seat 13 rotates 90 degrees so that the nut 60 reaches the marking device 40. The marking device 40 marks the upper end face of the nut 60. Then, the central transfer seat 13 rotates 90 degrees so that the nut 60 reaches the finished product collection device 50. Finally, the nut claw 14 drives a pair of claw plates 141 to move away so that the processed nut 60 falls into the finished product collection box 51. In this way, chamfering and marking can be completed without manual transfer and two feedings, which greatly improves the production efficiency of nuts.

[0059] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An automatic chamfering and marking device for nuts, characterized in that: The device includes a nut transfer device (10), a feeding device (20), a chamfering device (30), a marking device (40), and a finished product collection device (50). The nut transfer device (10) includes a circular plate-shaped central transfer seat (13) and a rotary drive mechanism for driving the central transfer seat (13) to rotate intermittently at equal angles of 90 degrees. Four nut claws (14) are evenly distributed around the cylindrical surface of the central transfer seat (13). The feeding device (20), the chamfering device (30), the marking device (40), and the finished product collection device (50) are evenly distributed around the rotation center axis of the central transfer seat (13). When the central transfer seat (13) stops rotating, the four nut claws (14) are respectively facing the central transfer seat (10). The device comprises a feeding device (20), a chamfering device (30), a marking device (40), and a finished product collection device (50); the feeding device (20) is used to transfer nuts (60) to the opposite nut claws (14); the chamfering device (30) is used to chamfer the upper and lower end faces of the nuts (60) on the opposite nut claws (14); the marking device (40) is used to mark the upper end face of the nuts (60) on the opposite nut claws (14); and the finished product collection device (50) is used to collect the nuts (60) that have been released from the opposite nut claws (14). The feeding device (20) includes a feeding bracket (21), a vertical feeding mechanism, and a nut rotation positioning mechanism; the feeding bracket (21) has a side bracket (212) with an opening facing away from the central transfer seat (13) formed on its end face near the central transfer seat (13); a limit lifting bracket (24) is provided directly below the side bracket (212); the nut rotation positioning mechanism includes a central lifting seat (261) vertically lifted and lowered directly below the side bracket (212), a rotation limit drive plate (28) horizontally movable on the side wall of the side bracket (212) with an opening away from the feeding bracket (21), and a nut horizontal limit plate (29) vertically and horizontally movable on the other two side walls of the side bracket (212); the central transfer seat (212) has a vertical lifting support (211) with an opening facing away from the central transfer seat (13) formed on its end face near the central transfer seat (13); the nut rotation positioning mechanism includes a vertical lifting support (211) with an opening facing away from the central transfer seat (13), a vertical lifting support (211) with an opening facing away from the feeding bracket (21), and a nut horizontal limit plate (29) vertically and horizontally movable on the other two side walls of the side bracket (212); the central transfer seat (211) has a vertical lifting support (211) with an opening facing away from the central transfer seat (13), ... A cylindrical central through rod (26) is formed on the upper end face of the lifting seat (261); the diameter of the central through rod (26) is the same as the inner diameter of the nut (60); the vertical feeding mechanism is used to fit the nut (60) onto the central through rod (26); the distance between the end face of the rotating limiting drive plate (28) near the feeding bracket (21) and the rotation center axis of the central through rod (26) is half the distance between a pair of opposite end faces of the nut (60); the limiting lifting bracket (24) is provided with a limiting lifting component for driving the central lifting seat (261); the side bracket (212) is provided with a rotating limiting component for driving the rotating limiting drive plate (28) and a horizontal limiting component for driving the nut horizontal limiting plate (29); The rotation limiting assembly includes a limiting support plate (27) parallel to the rotation limiting drive plate (28); the rotation limiting drive plate (28) is located between the limiting support plate (27) and the central through rod (26); the distance between the limiting support plate (27) and the rotation limiting drive plate (28) is adjustable.

2. The automatic chamfering and marking equipment for nuts according to claim 1, characterized in that: The nut claw (14) includes a pair of claw plates (141) that move away from or towards each other synchronously; the end faces of the pair of claw plates (141) that are close to each other are respectively formed with limiting grooves (1410); when the pair of claw plates (141) are close to each other, the pair of limiting grooves (1410) form a regular hexagonal groove with the same shape as the nut (60); the side walls of the pair of limiting grooves (1410) of the nut claw (14) facing the feeding device (20) near the central transfer seat (13) are vertically flush with the end face of the rotating limiting drive plate (28) near the feeding bracket (21).

3. The automatic chamfering and marking equipment for nuts according to claim 1, characterized in that: The vertical feeding mechanism includes a vibratory plate (22) fixed on the upper surface of the feeding bracket (21); the discharge end of the vibratory plate (22) is provided with a discharge guide groove (23); the end of the discharge guide groove (23) away from the vibratory plate (22) is horizontally arranged and the bottom is formed with a drop hole (230) with openings at the top and bottom; the drop hole (230) is located directly above the central through rod (26); the end of the discharge guide groove (23) away from the vibratory plate (22) is closed; a closing plate (25) for opening and closing the drop hole (230) is horizontally movable on the lower side of the discharge guide groove (23); a horizontal drive assembly is provided on the feeding bracket (21); the horizontal drive assembly is used to drive the closing plate (25).

4. The automatic chamfering and marking equipment for nuts according to claim 1, characterized in that: The chamfering device (30) includes a chamfering bracket, a pair of chamfering drive seats (35) vertically movable on the chamfering bracket and distributed vertically, and a chamfering drive mechanism for driving the pair of chamfering drive seats (35) to move away from each other synchronously; a chamfering motor (37) is fixed on the end faces of the pair of chamfering drive seats (35) that are close to each other; a chamfering cutter head (38) is fixed on the output shaft of the chamfering motor (37).

5. The automatic chamfering and marking equipment for nuts according to claim 1, characterized in that: The marking device (40) includes a marking bracket, a marking support base (44) vertically movable on the marking bracket, and a marking head (46); the marking head (46) is located directly above the marking support base (44); The nut (60) held by the nut claw (14) facing the marking device (40) is located between the marking head (46) and the marking support (44).

6. The automatic chamfering and marking equipment for nuts according to claim 5, characterized in that: The marking bracket is provided with an air jet assembly (47); the air jet assembly (47) is located directly above the nut (60) held by the nut claw (14) facing the marking device (40) and is used to blow away metal debris on the upper surface of the nut (60).

7. The automatic chamfering and marking equipment for nuts according to claim 1, characterized in that: The finished product collection device (50) includes a finished product collection box (51) with an opening at the top; four rectangularly distributed rollers (511) are provided on the bottom surface of the finished product collection box (51).

8. The automatic chamfering and marking equipment for nuts according to claim 7, characterized in that: A pair of limiting guide rails (52) for the roller (511) to slide are provided directly below the nut claw (14) facing the finished product collection device (50); the limiting guide rails (52) are facing the nut transfer device (10).

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