Pin shaft processing equipment and processing method

Abstract

The application discloses a pin shaft machining device and a machining method, and relates to the technical field of pin shaft machining.The device comprises a feeding tank and supporting legs arranged at the lower end of the feeding tank.A storage cavity for storing pin shafts is arranged in the feeding tank.The bottom of the storage cavity is in a slope structure.A vertical sliding groove is arranged at the bottom of the slope structure.An upper feeding sliding plate is slidably arranged in the vertical sliding groove.The upper end of the upper feeding sliding plate is obliquely arranged towards the outside of the feeding tank.The lower end of the upper feeding sliding plate is connected with a pushing assembly for driving the upper feeding sliding plate to reciprocate up and down.The device is designed according to the existing needs, simplifies the feeding operation of the pin shafts, and greatly improves the machining efficiency without placing the pin shafts one by one.In addition, the pin shafts can be placed one by one, and the positioned pin shafts can be ensured to be arranged with the nut end upwards, thereby ensuring the uniformity of the drilling positions of the pin shafts and facilitating the drilling operation.

Description

Technical Field

[0001] This invention relates to the field of pin machining technology, specifically a pin machining equipment and machining method. Background Technology

[0002] A pin is a standardized fastener that can provide both static fixation and relative movement with the connected parts. It is primarily used at the hinge joints of two parts to form a hinge connection. Pins are typically locked with cotter pins, ensuring reliable operation and easy disassembly. Currently, when drilling pins, a positioning fixture is generally required to fix them in place. Patent publication number CN115070469B discloses an integrated platform for pin machining. This platform uses a drive structure to bring two centering components closer together. Because the end of the conical chuck facing the pin has a conical surface, the pin can be automatically adjusted as the two conical chucks approach each other. Positioning is achieved by aligning the axis of the pin with the axis of the centering shaft and clamping the workpiece in the preset position. Drilling is then performed on the positioned pin. While this method allows for rapid positioning, it requires pre-positioning the pins sequentially on the conveyor belt surface for transport. Arranging the pins continuously is time-consuming. Furthermore, because the pins have a structure with one end larger than the other, their axes are not parallel to the conveyor belt surface, resulting in the pins' end faces not being vertical, which complicates subsequent processing. Additionally, ensuring the pins are aligned correctly during placement is time-consuming and hinders processing efficiency.

[0003] Based on this, a pin processing equipment and processing method are provided, which can eliminate the drawbacks of existing devices. Summary of the Invention

[0004] The purpose of this invention is to provide a pin processing equipment and processing method to solve the problems in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A pin processing device includes a feeding box and a support leg disposed at its lower end. The feeding box has a storage cavity for storing pins. The bottom of the storage cavity is a sloped structure, and a vertical groove is provided at the bottom of the sloped structure. A feeding slide slides slidably along the vertical groove. The upper end of the feeding slide slides is inclined towards the outside of the feeding box. The lower end of the feeding slide slides is connected to a pushing component for driving its up-and-down reciprocating motion. The width of the upper end of the feeding slide slides matches the width of the pins, thus allowing only one feeding slide slide to be placed side-by-side on its upper surface, enabling continuous feeding. A feeding component is provided on the side of the feeding box to receive the pins, thereby transferring the pins transferred from the upper end of the feeding slide slides one by one to the next process. A fixed ring is provided downstream, with its lower end supported by a support leg. A rotating ring is provided at the upper end of the fixed ring, with a clearance notch on the outer side of the upper end of the rotating ring. The rotating ring has a positioning hole for inserting a pin, and the inner wall of the clearance notch has an arc-shaped groove that matches the positioning hole. A guide component for guiding the pin is provided between the rotating ring and the feeding component. The positioning hole matches the diameter of the pin shaft but is smaller than the diameter of the pin end. The rotating ring is connected to a rotating component for driving its rotation. The side of the fixed ring has a drilling component for drilling the pin and an unloading component for removing the processed pin. Both the unloading component and the drilling component are mounted on the mounting side plate of the fixed ring.

[0007] Based on the above technical solutions, the present invention also provides the following optional technical solutions:

[0008] In one alternative: the drilling assembly includes a drilling seat slidably disposed on the upper end of the mounting side plate, the lower end of the drilling seat is connected to a displacement drive for moving it toward the pin, the upper end of the drilling seat is fixed with a drilling motor, the output end of the drilling motor is provided with a drill bit, the surface of the rotating ring where the arc groove is located is provided with a through hole, and the upper end of the drilling seat is also provided with a locking member for fixing the pin to be drilled.

[0009] In one alternative embodiment: the locking element includes two clamping slide rods slidably disposed on the drill seat, the reset block on the side of the clamping slide rod is connected to the drill seat through a clamping spring, the end of the clamping slide rod is provided with a clamping side plate, the clamping side plate is provided with a drill bit through hole to facilitate the drill bit to pass through, and the clamping surface of the clamping side plate is an arc-shaped or V-shaped structure.

[0010] In one alternative embodiment: the locking component further includes a pressing fixing bracket, the upper end of which is rotatably provided with a pressing wheel, the outer side of which is provided with a buffer layer, the lower end of which passes through a vertical through hole in the mounting side plate, and the lower end of which is provided with a base plate, the base plate being connected and fixed to the mounting side plate by a pressing spring.

[0011] In one alternative embodiment: the unloading assembly includes an unloading connecting frame connected to the mounting side plate, the upper end of the unloading connecting frame is provided with an unloading slide rail, the curvature of the unloading slide rail matches the curvature of the rotating ring, the side of the unloading slide rail facing the drilling assembly is attached to the upper end of the rotating ring, the other end of the unloading slide rail away from the drilling assembly is located away from the upper end of the rotating ring, the unloading slide rail is attached to the lower end of the pin nut, and a protrusion is provided at the end of the unloading slide rail.

[0012] In one alternative: the rotating assembly includes a driven gear ring disposed on the outside of the rotating ring, the driven gear ring meshing with a drive gear, the drive gear being connected to a rotary motor for driving its rotation, the rotary motor being disposed on a mounting side plate, and the mounting side plate being disposed on the side of the fixed ring.

[0013] In one alternative: the guiding assembly includes a guide bucket for receiving the pin, the lower end of the guide bucket being connected to a discharge conduit, the inner diameter of the discharge conduit matching the maximum diameter of the pin, and the side of the discharge conduit being connected and fixed to the feeding box via a connecting plate.

[0014] In one alternative embodiment: the feeding assembly includes a feeding conveyor belt, the bottom of which is connected to the side of the feeding box via a connecting rod. A feeding conveyor belt is disposed in the gap between the feeding conveyor belt and the feeding box. Both ends of the feeding conveyor belt are engaged with transmission rollers, one of which is connected to a feeding motor for driving its rotation. The feeding motor is disposed on a side baffle. The upper transmission surface of the feeding conveyor belt faces the surface of the side baffle. An upper limit plate for guiding a single pin is provided at the upper end of the side baffle. A guide ramp for guiding the pin is provided at the end of the feeding conveyor belt, and the curvature of the guide ramp matches the curvature of the end of the feeding conveyor belt.

[0015] In one alternative: the pushing assembly includes a first rack and a second rack feeding motor disposed on the outside of the feeding slide plate, a half gear meshing between the first rack and the second rack feeding motor, the half gear being disposed at the output end of the feeding motor, and the feeding motor being connected to the bottom of the feeding box via a lifting rod.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] This invention is designed to meet existing needs, simplifying the loading operation of pins. It eliminates the need to place pins one by one, greatly improving processing efficiency. Furthermore, it allows for the placement of pins one by one, ensuring that the nut end of each pin is facing upwards, guaranteeing the uniformity of the drilling position for each pin and facilitating the drilling operation. Additionally, it allows for tight compression of the sides and top of the pins at the drilling position, ensuring the stability of the drilling. After drilling is completed, the pins can be guided to achieve automatic unloading. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of one side of the invention.

[0019] Figure 2 This is a schematic diagram of the structure on the other side of the present invention.

[0020] Figure 3 This is a schematic diagram of the fixed ring and rotating ring structures of the present invention.

[0021] Figure 4 This is a schematic diagram of the lower end structure of the mounting side plate of the present invention.

[0022] Figure 5 This is a schematic diagram of the lower pressure roller and unloading slide rail structure of the present invention.

[0023] Figure reference numerals: 11. Feeding box; 12. Feeding slide plate; 13. Feeding conveyor belt; 14. Upper limit plate; 15. Side baffle; 16. Guide ramp; 17. Guide hopper; 18. Connecting plate; 19. Discharge guide pipe; 20. First collecting hopper; 22. Guide ramp; 21. Second collecting cylinder; 23. Mounting side plate; 24. Drill seat; 25. Rotating ring; 26. Pin; 27. First rack; 28. Half gear; 29. ​​Second rack; 30. Feeding motor; 31. Through port. 1. Arc groove 32. Unloading slide rail 33. Pressure roller 34. Pressure fixing frame 35. Unloading connecting frame 36. Drill bit 37. Compression spring 38. Compression slide bar 39. Drilling motor 40. Feed motor 41. Feed screw 42. Compression side plate 43. Drive gear 44. Rotary motor 45. Fixing ring 46. Clearance notch 47. Driven gear ring 48. Pressure spring 49. Base plate 50. Drill bit hole 51. Second collection hopper 52. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0025] In one embodiment, such as Figures 1-5As shown, a pin processing device includes a feeding box 11 and a support leg disposed at its lower end. The feeding box 11 has a storage cavity for storing pins 26. The bottom of the storage cavity is a sloping structure, and a vertical groove is provided at the bottom of the sloping structure. A feeding slide plate 12 slides along this vertical groove. The upper end of the feeding slide plate 12 is inclined towards the outside of the feeding box 11. The lower end of the feeding slide plate 12 is connected to a pushing component for driving its up-and-down reciprocating motion. The width of the upper end of the feeding slide plate 12 matches the width of the pin 26, thus allowing only one feeding slide plate 12 to be placed side-by-side on its upper surface, enabling continuous feeding. The side of the feeding box 11 has a feeding component for receiving the pins 26, thereby transferring the pins 26 transferred from the upper end of the feeding slide plate 12 one by one to the next process. A fixing ring 46 is provided downstream of the feeding component. The lower end of the fixing ring 46 is supported by the support leg, and a rotating ring 25 is rotatably disposed at the upper end of the fixing ring 46. The rotating ring 25 has a clearance notch 47 on its upper outer side. The rotating ring 25 has a positioning hole for inserting the pin 26. The inner wall of the clearance notch 47 has an arc-shaped groove 32 that matches the positioning hole. A guide component for guiding the pin 26 is provided between the rotating ring 25 and the feeding assembly. The positioning hole matches the diameter of the pin shaft, but is smaller than the diameter of the pin end. Therefore, if the pin nut end is facing downwards, the positioning hole cannot accommodate it. Furthermore, due to the clearance notch 47... The presence of this means that the pin 26 with the nut head facing down will spring to one side to complete the screening process. When the pin nut is set with one end facing up, the pin shaft will be smoothly inserted into the positioning hole to complete the positioning process. The rotating ring 25 is connected to a rotating component for driving its rotation. The side of the fixed ring 46 is provided with a drilling component for drilling the pin 26 and a material unloading component for removing the processed pin 26. The material unloading component and the drilling component are both set on the mounting side plate 23 on the side of the fixed ring 46.

[0026] A first collecting hopper 20 is provided on the side of the fixed ring 46 where the guide component is located. A second collecting hopper 52 for collecting materials is provided at the lower end of the first collecting hopper 20, so that the pin with the large end facing down can be collected.

[0027] The drilling assembly includes a drilling seat 24 slidably disposed on the upper end of the mounting side plate 23. The lower end of the drilling seat 24 is connected to a displacement drive for moving it toward the pin 26. A drilling motor 40 is fixed on the upper end of the drilling seat 24. A drill bit 37 is provided at the output end of the drilling motor 40. A through-hole 31 is provided on the surface of the rotating ring 25 where the arc groove 32 is located. The upper end of the drilling seat 24 is also provided with a locking member for fixing the pin 26 to be drilled. The pin 26 is fixed by the locking member, thereby ensuring the stability of drilling.

[0028] The locking component includes two clamping slide rods 39 slidably mounted on the drill seat 24. The reset block on the side of the clamping slide rod 39 is connected to the drill seat 24 through a clamping spring 38. A clamping side plate 43 is provided at the end of the clamping slide rod 39. The clamping side plate 43 is provided with a drill bit through hole 51 to facilitate the drill bit 37 to pass through. The clamping surface of the clamping side plate 43 is arc-shaped or V-shaped, which can cooperate with the surface of the pin 26 to improve the clamping effect.

[0029] The locking component also includes a pressing fixing bracket 35. A pressing wheel 34 is rotatably provided on the upper end of the pressing fixing bracket 35. A buffer layer is provided on the outer side of the pressing wheel 34. The lower end of the pressing fixing bracket 35 passes through a vertical through hole on the mounting side plate 23. A base plate 50 is provided at the lower end of the pressing fixing bracket 35. The base plate 50 is connected and fixed to the mounting side plate 23 by a pressing spring 49. When the pin 26 moves to the drilling position with the rotating ring 25, the pressing wheel 34 will press on the upper end of the pin 26, thereby further positioning the pin 26.

[0030] The displacement drive includes a feed screw 42 that mates with a transmission screw hole on the drill seat 24. One end of the feed screw 42 is rotatably connected to the fixed block, and the other end is connected to the output end of the feed motor 41. Under the action of the feed motor 41, the feed screw 42 moves relative to the drill seat 24. Under the action of the thread, the drill seat 24 can slide along the surface of the mounting side plate 23, thereby providing power for drilling feed.

[0031] The unloading assembly includes an unloading connecting frame 36 connected to the mounting side plate 23. The upper end of the unloading connecting frame 36 is provided with an unloading slide rail 33. The curvature of the unloading slide rail 33 matches the curvature of the rotating ring 25. The side of the unloading slide rail 33 facing the drilling assembly is attached to the upper end of the rotating ring 25, and the other end of the unloading slide rail 33 away from the drilling assembly is set away from the upper end of the rotating ring 25. The unloading slide rail 33 is attached to the lower end of the pin nut. In this way, when the pin 26 rotates with the rotating ring 25, the unloading slide rail 33 will continuously lift the pin 26. The end of the unloading slide rail 33 is provided with a protrusion. Under the action of the protrusion, the pin 26 will be pushed outward, thereby completing the unloading process.

[0032] A guide ramp 22 is provided below the end of the unloading slide rail 33, and a second collection cylinder 21 for collecting materials is provided at the lower end of the guide ramp 22, so that the processed parts can be collected.

[0033] The rotating assembly includes a driven gear ring 48 disposed on the outer side of the rotating ring 25. The driven gear ring 48 meshes with a drive gear 44. The drive gear 44 is connected to a rotary motor 45 for driving its rotation. The rotary motor 45 is disposed on a mounting side plate 23, which is disposed on the side of a fixed ring 46. The rotary motor 45 drives the drive gear 44 to rotate, and the drive gear 44, in conjunction with the driven gear ring 48, drives the rotating ring 25 to rotate, thereby switching the position of the pin 26.

[0034] The guiding assembly includes a guide bucket 17 for receiving the pin 26. The lower end of the guide bucket 17 is connected to a feeding conduit 19. The inner diameter of the feeding conduit 19 matches the maximum diameter of the pin 26. The side of the feeding conduit 19 is connected and fixed to the feeding box 11 through a connecting plate 18. In this way, after the pin 26 is transferred from the feeding assembly, the pin 26 will first be received by the guide bucket 17 and then conveyed along the feeding conduit 19. Under the guidance of the feeding conduit 19, the pin 26 falls in a vertical state.

[0035] Each positioning hole is equipped with a positioning ring, which can be replaced to accommodate pins 26 of different diameters;

[0036] The feeding assembly includes a feeding conveyor belt 13. The bottom of the feeding conveyor belt 13 is connected to the side of the feeding box 11 via a connecting rod. A feeding conveyor belt 13 is provided in the gap between the feeding conveyor belt 13 and the feeding box 11. Both ends of the feeding conveyor belt 13 are engaged with transmission rollers. One of the transmission rollers is connected to a feeding motor for driving its rotation. The feeding motor is mounted on a side baffle 15. The upper transmission surface of the feeding conveyor belt 13 faces the surface of the side baffle 15. The upper end of the side baffle 15 is provided with an upper limit plate 14 for guiding a single pin 26 to avoid the problem of two pins 26 overlapping. The end of the feeding conveyor belt 13 is provided with a guide ramp 16 for guiding the pin 26. The curvature of the guide ramp 16 matches the curvature of the end of the feeding conveyor belt 13.

[0037] The pushing assembly includes a first rack 27 and a second rack feeding motor 30 disposed on the outside of the feeding slide plate 12. A half gear 28 meshes between the first rack 27 and the second rack feeding motor 30. The half gear 28 is disposed at the output end of the feeding motor 30. The feeding motor 30 is connected to the bottom of the feeding box 11 through a hanging rod. The feeding motor 30 drives the half gear 28 to rotate. With the half gear 28 cooperating with the second rack feeding motor 30, the feeding slide plate 12 moves up and down along the vertical slide groove, thereby causing the pin 26 inside the feeding box 11 to be continuously fed out.

[0038] A camera is installed at position 43 of the clamping side plate to detect whether there is a pin at the positioning socket position. The camera is electrically connected to the processor, and the processor is electrically connected to the drilling assembly and the rotating assembly to determine whether to perform drilling operations.

[0039] The above embodiment discloses a pin processing device. In actual use, the pin 26 to be processed is poured into the feeding box 11. The pushing component drives the feeding slide 12 to move up and down reciprocally. The pins in the feeding box 11 will be continuously placed on the upper end of the feeding slide 12. When the feeding slide 12 moves to the upper end position of the feeding box 11, the pins on the upper end of the feeding slide 12 will be transferred to the feeding component. Under the action of the feeding component, the pin 26 is continuously fed into the guide hopper 17. Under the guidance of the discharge guide 19, the pin falls in a vertical state. At this time, if the pin nut end is facing down, the positioning hole cannot accommodate it, and due to the avoidance notch 47... When the nut head of the pin 26 is facing downwards, it will spring to one side to complete the screening process. When the nut end of the pin is facing upwards, the pin shaft will smoothly insert into the positioning hole to complete the positioning process. When the pin 26 is moved to the drilling position, the locking component can press down and fix the side and top of the pin 26. Then, by the lateral movement of the drill bit 37, the drilling process of the pin 26 surface is completed. After drilling is completed, when the pin 26 rotates with the rotating ring 25, the unloading slide rail 33 will continuously lift the pin 26. The end of the unloading slide rail 33 is provided with a protrusion block. Under the action of the protrusion block, the pin 26 will be pushed outwards to complete the unloading process.

[0040] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A pin processing device, comprising a feeding box (11) and a support leg disposed at its lower end, wherein the feeding box (11) is provided with a storage cavity for storing pins (26), the bottom of the storage cavity is a sloping structure, a vertical slide groove is provided at the bottom position of the sloping structure, and a feeding slide plate (12) is slidably disposed at the position of the vertical slide groove, the upper end of the feeding slide plate (12) is inclined toward the outside of the feeding box (11); Its features are, The lower end of the feeding slide (12) is connected to a push component for driving its up-and-down reciprocating motion. The upper width of the feeding slide (12) matches the width of the pin (26). The side of the feeding box (11) is provided with a feeding component for receiving the pin (26). A fixed ring (46) is provided downstream of the feeding component. The lower end of the fixed ring (46) is supported by a support rod. A rotating ring (25) is provided on the upper end of the fixed ring (46). A clearance notch (47) is provided on the outer side of the upper end of the rotating ring (25). A positioning hole for inserting the pin (26) is provided on the rotating ring (25). An arc groove (32) matching the positioning hole is provided on the inner wall of the clearance notch (47). A guide assembly for guiding the pin (26) is provided between the rotating ring (25) and the feeding assembly. The rotating ring (25) is connected to a rotating assembly for driving it to rotate. The side of the fixed ring (46) is provided with a drilling assembly for drilling the pin (26) and an unloading assembly for removing the processed pin (26). The unloading assembly and the drilling assembly are both set on the mounting side plate (23) on the side of the fixed ring (46). The drilling assembly includes a drilling seat (24) slidably disposed on the upper end of the mounting side plate (23). The upper end of the drilling seat (24) is also provided with a locking member for fixing the pin (26) to be drilled. The locking member includes two pressing slide rods (39) slidably disposed on the drilling seat (24). The reset block on the side of the pressing slide rod (39) is connected to the drilling seat (24) through a pressing spring (38). The end of the pressing slide rod (39) is provided with a pressing side plate (43). The pressing side plate (43) is provided with a drill bit through hole (51) to facilitate the drill bit (37) to pass through. The pressing surface of the pressing side plate (43) is an arc-shaped or V-shaped structure. The locking component also includes a pressing fixing bracket (35), the upper end of which is provided with a pressing wheel (34), the outer side of which is provided with a buffer layer, the lower end of which passes through a vertical through hole on the mounting side plate (23), and the lower end of which is provided with a base plate (50), the base plate (50) and the mounting side plate (23) are connected and fixed by a pressing spring (49); The unloading assembly includes an unloading connecting frame (36) connected to the mounting side plate (23). The unloading connecting frame (36) has an unloading slide rail (33) at its upper end. The arc of the unloading slide rail (33) matches the arc of the rotating ring (25). The unloading slide rail (33) is attached to the upper end of the rotating ring (25) on the side facing the drilling assembly. The other end of the unloading slide rail (33) away from the drilling assembly is located away from the upper end of the rotating ring (25). The unloading slide rail (33) is attached to the lower end of the pin nut. A protrusion is provided at the end of the unloading slide rail (33). The guiding assembly includes a guide bucket (17) for receiving the pin (26), the lower end of the guide bucket (17) is connected to a feeding conduit (19), the inner diameter of the feeding conduit (19) matches the maximum diameter of the pin (26), and the side of the feeding conduit (19) is connected and fixed to the feeding box (11) through a connecting plate (18).

2. The pin processing equipment according to claim 1, characterized in that, The lower end of the drill seat (24) is connected to a displacement drive for moving it toward the pin (26). A drill motor (40) is fixed at the upper end of the drill seat (24). A drill bit (37) is provided at the output end of the drill motor (40). A through-hole (31) is provided on the surface of the rotating ring (25) where the arc groove (32) is located.

3. The pin processing equipment according to claim 1, characterized in that, The rotating assembly includes a driven gear ring (48) disposed on the outside of the rotating ring (25), the driven gear ring (48) meshing with the drive gear (44), the drive gear (44) being connected to a rotary motor (45) for driving its rotation, the rotary motor (45) being disposed on the mounting side plate (23), and the mounting side plate (23) being disposed on the side of the fixed ring (46).

4. The pin processing equipment according to claim 1, characterized in that, The feeding assembly includes a feeding conveyor belt (13), the bottom of which is connected to the side of the feeding box (11) via a connecting rod. A feeding conveyor belt (13) is provided in the gap between the feeding conveyor belt (13) and the feeding box (11). Both ends of the feeding conveyor belt (13) are engaged with the transmission rollers. One of the transmission rollers is connected to a feeding motor for driving its rotation. The feeding motor is set on the side baffle (15). The upper transmission surface of the feeding conveyor belt (13) is set facing the surface of the side baffle (15). The upper end of the side baffle (15) is provided with an upper limit plate (14) for guiding a single pin (26). The end of the feeding conveyor belt (13) is provided with a guide ramp (16) for guiding the pin (26). The curvature of the guide ramp (16) matches the curvature of the end of the feeding conveyor belt (13).

5. The pin processing equipment according to claim 1, characterized in that, The pushing assembly includes a first rack (27) and a second rack feeding motor (30) disposed on the outside of the feeding slide plate (12). A half gear (28) meshes between the first rack (27) and the second rack feeding motor (30). The half gear (28) is disposed at the output end of the feeding motor (30). The feeding motor (30) is connected to the bottom of the feeding box (11) via a hanging rod.

6. A processing method for a pin processing device according to any one of claims 1-5, characterized in that, Includes the following steps: Step 1: Pour the pins (26) to be processed into the feeding box (11). By pushing the component, the feeding slide (12) moves up and down repeatedly. The pins in the feeding box (11) will be continuously placed on the upper end of the feeding slide (12). Step 2: When the feeding slide (12) moves to the upper port position of the feeding box (11), the pin at the upper end of the feeding slide (12) will be transferred to the feeding assembly. Under the action of the feeding assembly, the pin (26) is continuously fed into the guide hopper (17). Under the guidance of the discharge guide tube (19), the pin falls in a vertical state. If one end of the pin nut is facing down, the positioning hole cannot accommodate it, and the screening process is completed. When one end of the pin nut is facing up, the pin shaft will be smoothly inserted into the positioning hole, and the positioning process is completed. Step 3: When the pin (26) is moved to the drilling position, the locking part presses down and fixes the side and top of the pin (26). Then, the drilling process on the surface of the pin (26) is completed by the lateral movement of the drill bit (37). Drilling is completed. Step 4: When the pin (26) rotates with the rotating ring (25), the unloading slide rail (33) will continuously lift the pin (26). The unloading slide rail (33) has a protrusion at its end. Under the action of the protrusion, the pin (26) will be pushed outward, thereby completing the unloading process.

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