Automatic drill and riveter

Abstract

The application discloses an automatic drilling and riveting machine and relates to the technical field of circuit board processing.The automatic drilling and riveting machine comprises a machining center, a top single-shaft drilling die module and a bottom single-shaft drilling die module are arranged in the machining center, each of the two die modules comprises a main shaft chuck, one drilling tool is fixed on each main shaft chuck, a drill bit is arranged on each drilling tool, the drill bit is externally sleeved with a chip suction pipe, two sealing circular plates are coaxially fixed in the chip suction pipe, the drilling tool and the drill bit coaxially penetrate through the two sealing circular plates, a supporting shaft is rotatably arranged in the chip suction pipe, a chip cleaning pipe is arranged on the supporting shaft, a cleaning spring is coaxially arranged in the chip cleaning pipe, a power mechanism for driving the cleaning spring to stretch and retract is arranged on a mounting plate, and a driving piece for driving the supporting shaft to rotate is arranged in the chip suction pipe.The cleaning spring can clean the inner wall of the drilling tool, vibration can be generated to shake off the PCB chips, dust can be sucked by the chip suction pipe, thus, the chips can be effectively prevented from leaking, and pollution can be avoided.

Description

Technical Field

[0001] This invention relates to the field of circuit board processing technology, and in particular to an automatic riveting machine. Background Technology

[0002] The riveting process in PCB manufacturing leaves rivets on the PCB circuit board, which can cause contamination in subsequent chemical processes. Therefore, a riveting process is needed to remove the rivets and create holes that meet assembly requirements. The drilling accuracy, hole wall smoothness, and cleanliness of the processing environment directly affect the electrical performance and assembly reliability of the circuit board. Automatic riveting machines are key equipment for this process. They use a spindle to drive a drill bit to cut the rivets and the substrate, coordinating with subsequent processing steps to complete the circuit board manufacturing. These machines are widely used in PCB production processes in consumer electronics, industrial control, and communication equipment.

[0003] A perforation device for circuit board processing, disclosed in CN116872295A, includes a base, a mounting plate on the base, a three-axis module on the mounting plate, and a cleaning section at the execution end of the three-axis module. The cleaning section includes a frame assembly, on which a drilling assembly, a blowing assembly, and a rotating mechanism are mounted. A pneumatic assembly is disposed between the blowing assembly and the rotating mechanism. The frame assembly includes a first plate, a second plate, and a connecting rod. The drilling assembly and the blowing assembly are both mounted on the first plate, and the rotating mechanism is mounted on the second plate. The drilling assembly includes a first telescopic member, a third plate, a driving member, and a drill bit. The first telescopic member is located at the bottom of the first plate, the third plate is located at the telescopic end of the first telescopic member, the driving member is located on the third plate, and the drill bit is located at the output end of the driving member and at the bottom of the third plate. The blowing assembly includes a first air cylinder, a first air pipe, and a pipe body. The device is equipped with an inlet valve and an outlet valve. A first air pipe is located between a first air cylinder and a pipe body, and the pipe body has air holes. The rotating mechanism includes a transmission assembly, a transmission shaft, a drive gear, a driven gear, a second annular component, a guide assembly, and an elastic telescopic assembly. The transmission shaft is driven by the transmission assembly and the drive component. The guide assembly and the elastic telescopic assembly are both located between the driven gear and the second annular component. The guide assembly includes a guide seat, a support plate, and a connecting shaft. The guide seat has a guide groove and a recess. The guide groove slides with the second annular component, and the recess slides with the support plate. The connecting shaft is located at the bottom of the guide seat, and the outer periphery of the connecting shaft is provided with bristles. The pneumatic assembly includes an air storage pipe, a second air pipe, a second air cylinder, and a first annular component. A first solenoid valve is located on the air storage pipe, and a second solenoid valve is located on the second air cylinder. The second air pipe is located between the first solenoid valve and the second solenoid valve, and the first annular component is located at the end of the second air cylinder.

[0004] Based on the above technical features, the technical problem is as follows: In the prior art, when removing rivets, debris is easily generated and adheres to the inner wall of the drilled hole, which is difficult to clean, affecting the quality of the hole wall and making the smoothness of the hole wall worse. This can easily cause contamination in subsequent chemical processes and reduce the product yield.

[0005] Therefore, it is necessary to solve the above problems by using an automatic riveting machine. Summary of the Invention

[0006] The purpose of this invention is to provide an automatic riveting machine to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an automatic riveting machine, comprising a machining center, wherein a top single-axis drilling module and a bottom single-axis drilling module are installed inside the machining center; both the top single-axis drilling module and the bottom single-axis drilling module include a spindle chuck, and each spindle chuck holds and fixes a drilling tool for drilling and removing rivets from a PCB board, and each drilling tool has a drill bit at its end away from the spindle chuck;

[0008] The drill bit is fitted with a chip suction tube, and a sealing plate is coaxially fixed at both ends of the chip suction tube; the sealing plate near the spindle chuck is fitted on the drilling tool, and the sealing plate away from the spindle chuck has a through hole for the drill bit to pass through.

[0009] The debris suction tube is rotatably installed with a support shaft, and a mounting plate is fixedly installed on the support shaft. A debris cleaning tube for communicating with the perforation is fixed on the mounting plate, and a cleaning spring for cleaning the inner wall of the drill hole is coaxially installed inside the debris cleaning tube.

[0010] The mounting plate is equipped with a power mechanism that drives the cleaning spring to extend and retract axially along the debris cleaning tube.

[0011] A drive unit for rotating the support shaft is installed on the sealing circular plate away from the spindle chuck.

[0012] Preferably, the power mechanism includes a movable circular plate, which is coaxially disposed inside the debris cleaning tube; a guide groove is provided axially on the inner wall of the debris cleaning tube, and a limiting slider is fixedly disposed at the circumferential end of the movable circular plate, which is limited and slides in cooperation with the guide groove; the end of the cleaning spring near the mounting plate is fixedly connected to the movable circular plate; an electromagnet is fixedly mounted on the mounting plate, and a magnet for magnetic cooperation with the electromagnet is fixedly mounted on the movable circular plate.

[0013] Preferably, a counterweight slider is fixed to the end of the cleaning spring away from the mounting plate, and the counterweight slider is located inside the cleaning spring; a telescopic stabilizing rod is fixed between the counterweight slider and the movable circular plate along the debris cleaning tube (axially arranged and used to stabilize the swaying of the counterweight slider).

[0014] Preferably, the driving component includes two electric push rods, both of which are fixedly mounted on a sealing circular plate away from the main spindle chuck and located inside the debris suction tube; two slides are provided inside the debris suction tube, and the support shaft passes through the two slides and is rotatably connected to the two slides; the two electric push rods correspond one-to-one with the two slides, and the telescopic shaft of each electric push rod is fixedly connected to the corresponding slide; a push plate with an oblong hole is fixed radially at both axial ends of the support shaft; a clearance groove is provided on the sealing circular plate away from the main spindle chuck for the two push plates to rotate and make way, and a fixed shaft parallel to the support shaft is fixed in each clearance groove; the two push plates correspond one-to-one with the two fixed shafts, and each fixed shaft is inserted into the oblong hole of the corresponding push plate and engages with the corresponding push plate in a transmission cooperation.

[0015] Preferably, the two electric push rods are electrically synchronized; the two fixed shafts are coaxially opposed.

[0016] Preferably, the debris cleaning tube is always perpendicular to the support shaft space.

[0017] Preferably, a connecting pipe is fixedly mounted radially on the debris suction pipe, and a dust suction pipe is connected to the outside of the connecting pipe. The dust suction pipe is connected to an industrial vacuum cleaner that is fixedly installed on the machining center.

[0018] Preferably, the debris suction tube is externally fixed with a fixing ring, which is fixedly connected to a sliding frame that is vertically slidably installed in the machining center; the sliding frame is driven by a power source in the machining center.

[0019] Preferably, the diameter of the perforation is larger than the outer diameter of the debris cleaning tube.

[0020] Preferably, the connection between the drill bit and the drilling tool is fixedly provided with a cutting edge for chamfering and deburring the borehole opening.

[0021] The technical effects and advantages of this invention are as follows:

[0022] This invention uses a cleaning spring to clean the inner wall of the drilled hole. During the extension and retraction of the cleaning spring, vibration occurs, which shakes off PCB debris. The shaken-off PCB debris can be sucked away by a debris suction tube, making the debris cleaning more thorough, avoiding contamination of the processing environment, ensuring that debris does not re-adhere to the PCB board surface or the inner wall of the drilled hole, and improving the product yield.

[0023] This invention employs a top single-axis drilling module and a bottom single-axis drilling module positioned vertically opposite each other to drill and remove rivets on a PCB board. The lower drill bit can cut the outer copper foil at the bottom of the PCB, while the upper drill bit can drill through the PCB board, removing rivets in one go. The rivet removal is fast and efficient.

[0024] The present invention has a blade fixedly provided at the connection between the cutter head and the cutting tool for removing burrs at the chamfer of the drill hole opening. No subsequent manual removal is required, the degree of automation is high, the burrs are removed more cleanly, and the burr removal efficiency is high. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0026] Figure 2 This is a three-dimensional side view of the present invention;

[0027] Figure 3 This is a front view of the interior of the machining center of the present invention;

[0028] Figure 4 This is a top view of the interior of the machining center of the present invention;

[0029] Figure 5 This is a schematic internal side view of the machining center of the present invention;

[0030] Figure 6 This is a schematic diagram of the cutting tool of the present invention;

[0031] Figure 7 This is a schematic diagram of the interior of the debris suction tube of the present invention;

[0032] Figure 8 This is a schematic diagram of the interior of the debris cleaning tube of the present invention;

[0033] Figure 9 For the present invention Figure 8 Enlarged view of point A;

[0034] Figure 10 This is a schematic diagram of the drill bit of the present invention;

[0035] Figure 11 This is a schematic diagram of the working state of the cleaning spring of the present invention.

[0036] In the diagram: 1. Machining center; 2. Inlet frame; 3. Control panel; 4. Inlet conveying mechanism; 5. Outlet conveying mechanism; 6. Top single-axis drilling module; 7. Bottom single-axis drilling module; 8. Debris suction pipe; 9. Drilling tool; 10. Drill bit; 11. Cutting edge; 12. Fixing ring; 13. Sliding frame; 14. Connecting pipe; 15. Upper suction pipe; 16. Lower suction pipe; 17. Sealing round plate; 18. Perforation; 19. Electric push rod; 20. Slide seat; 21. Support shaft; 22. Mounting plate; 23. Push plate; 24. Waist-shaped hole; 25. Fixing shaft; 26. Debris cleaning pipe; 27. Guide groove; 28. Moving round plate; 29. ​​Electromagnet; 30. Magnet; 31. Cleaning spring; 32. Counterweight slider; 33. Limit slider; 34. Telescopic stabilizer bar. Detailed Implementation

[0037] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0038] This invention provides, for example Figures 1 to 11 The automatic drilling and riveting machine shown includes a machining center 1. Inside the machining center 1 are an inlet conveyor mechanism 4 and an outlet conveyor mechanism 5 for transporting PCB boards. The area between the inlet conveyor mechanism 4 and the outlet conveyor mechanism 5 is a processing station. The machining center 1 is equipped with an inlet frame 2 and an outlet frame. The inlet frame 2 is equipped with an inlet gripper mechanism and an inlet transfer mechanism for gripping the PCB boards, and the outlet frame is equipped with an outlet gripper mechanism and an outlet transfer mechanism for gripping the PCB boards. The machining center 1 is equipped with a control panel 3 and a controller for operating the entire machining center 1. The machining center 1 is equipped with an existing CCD vision inspection system and a UVW alignment platform for precise positioning of the PCB boards. The machining center 1 is also equipped with a servo-driven positioning device for initial positioning and correcting the placement posture of the PCB boards. All of the above are existing technologies and will not be described in detail here.

[0039] The top single-axis drilling module 6 and the bottom single-axis drilling module 7 are installed inside the machining center 1, and the top single-axis drilling module 6 and the bottom single-axis drilling module 7 are positioned opposite each other.

[0040] Both the top single-axis drilling module 6 and the bottom single-axis drilling module 7 include a spindle chuck. Each spindle chuck holds and fixes a drilling tool 9 for drilling and removing rivets from the PCB board. A drill bit 10 is fixedly installed at the end of each drilling tool 9 away from the spindle chuck. The two drill bits 10 are coaxially opposite each other, and the machining position is located between the two drill bits 10.

[0041] The bottom drill bit 10 is used to cut the outer copper foil on the bottom of the PCB, while the top drill bit 10 is used to drill through the PCB. The two drill bits 10 work together to drill out rivets on the PCB.

[0042] Each drill bit 10 is provided with a cutting edge 11 at the connection point with the drilling tool 9 to remove burrs from the chamfer of the borehole opening.

[0043] The connection between the drill bit 10 and the drilling tool 9 is a conical surface circumferentially arranged along the drill bit 10. At the same time, a spiral groove that smoothly communicates with the chip removal groove of the drill bit 10 is opened along the circumferential direction of the connection between the drill bit 10 and the drilling tool 9. The groove extends to the drilling tool 9. A cutting edge 11 that matches the chamfer of the drill hole opening is fixedly arranged at the intersection of the groove and the conical surface. The cutting edge 11 protrudes outward from the groove.

[0044] The following description uses one drill bit 10 as an example. Another drill bit 10 is the same as it and is symmetrically arranged about the machining position.

[0045] A chip suction tube 8 is fitted around the drill bit 10, and a fixing ring 12 is fixedly fitted around the chip suction tube 8. The fixing ring 12 is fixed to a sliding frame 13, which is slidably mounted inside the machining center 1. A power source is installed inside the machining center 1 to drive the sliding frame 13 to slide vertically up and down. This power source can be an existing pneumatic cylinder or a hydraulic cylinder, which is prior art and will not be described in detail here.

[0046] A sealing disc 17 is coaxially fixed at both ends of the debris suction tube 8, and both sealing discs 17 close the ends of the debris suction tube 8. The sealing disc 17 near the spindle chuck is fitted onto the drilling tool 9; the drilling tool 9 is cylindrical and is both rotatably and slidably fitted with the sealing disc 17.

[0047] The drill bit 10 is located inside the chip suction tube 8. A through hole 18 is made on the sealing circular plate 17 away from the spindle chuck, which is directly opposite to the drill bit 10, so that the drill bit 10 can pass through the chip suction tube 8.

[0048] The perforation 18 is a circular hole with a diameter greater than the maximum outer diameter of the drill bit 10 and also greater than the vertical distance between the end of the cutting edge 11 that is radially away from the drill bit 10 and the central axis of the drill bit 10, that is, the cutting edge 11 passes through the perforation 18.

[0049] A horizontal support shaft 21 is rotatably mounted inside the debris suction tube 8, and the support shaft 21 is spatially perpendicular to the drill bit 10. A drive component is mounted on the sealing circular plate 17 away from the spindle chuck. The drive component is used to drive the support shaft 21 to rotate, and also to drive the support shaft 21 to move closer to or away from the hole 18.

[0050] Specifically, the drive unit includes two electric push rods 19, both of which are fixedly mounted on the sealing circular plate 17 away from the spindle chuck and are located inside the debris suction tube 8. The perforation 18 is located between the two electric push rods 19.

[0051] Two slides 20 are provided inside the debris suction tube 8, and the two slides 20 are slidably connected to the sealing circular plate 17 away from the main shaft chuck. The support shaft 21 passes through the two slides 20 and is rotatably connected to the two slides 20.

[0052] Two electric actuators 19 correspond one-to-one with two slides 20, and the telescopic shaft of each electric actuator 19 is fixedly connected to the corresponding slide 20. The two electric actuators 19 are electrically synchronized, and their telescopic shafts are parallel to each other and extend and retract in the same direction. The telescopic shafts of the two electric actuators 19 are spatially perpendicular to the support shaft 21.

[0053] Two push plates 23 with waist-shaped holes 24 are fixed radially at both axial ends of the support shaft 21. The two push plates 23 and the support shaft 21 together form a U-shaped structure. Two clearance grooves are opened on the sealing circular plate 17 away from the spindle chuck. The openings of the two clearance grooves face upward and are connected to the inside of the debris suction pipe 8.

[0054] Two clearance slots correspond one-to-one with two push plates 23, and each clearance slot is used for the rotation clearance of the corresponding push plate 23. A fixed shaft 25 parallel to the support shaft 21 is fixed in each clearance slot, and the two fixed shafts 25 are coaxially opposed. The two push plates 23 correspond to the fixed shafts 25 in their respective clearance slots, and each fixed shaft 25 is inserted into the oblong hole 24 of the corresponding push plate 23 and engages in abutment and transmission with the corresponding push plate 23.

[0055] A mounting plate 22, which is a right-angled plate, is fixedly mounted on the support shaft 21. One right-angled side of the plate is radially connected to the support shaft 21, and this plate is parallel to the support shaft 21. The other right-angled side of the plate is parallel to the support shaft 21, and a debris cleaning tube 26, which is always spatially perpendicular to the support shaft 21, is fixedly mounted on this plate. The debris cleaning tube 26 communicates with a perforation 18, the diameter of which is larger than the outer diameter of the debris cleaning tube 26.

[0056] A cleaning spring 31 for cleaning the inner wall of the drill hole is coaxially installed inside the debris cleaning tube 26.

[0057] A power mechanism is installed on the mounting plate 22. The power mechanism is used to drive the cleaning spring 31 to extend and retract axially along the debris cleaning tube 26.

[0058] Specifically, the power mechanism includes a movable circular plate 28, which is coaxially disposed within the debris cleaning tube 26. A plurality of guide grooves 27 are axially formed on the inner wall of the debris cleaning tube 26, and these guide grooves 27 are evenly distributed circumferentially along the tube. A plurality of limiting sliders 33 are fixedly disposed at the circumferential ends of the movable circular plate 28, each limiting slider 33 corresponding one-to-one with a guide groove 27. Each limiting slider 33 is located within its corresponding guide groove 27 and engages in a limiting sliding fit with the corresponding guide groove 27.

[0059] The end of the cleaning spring 31 near the mounting plate 22 is fixedly connected to the movable circular plate 28. An electromagnet 29 is fixedly mounted on the mounting plate 22, and a magnet 30 is fixed to the end of the movable circular plate 28 away from the cleaning spring 31. The magnet 30 and the electromagnet 29 are magnetically attracted or magnetically repelled.

[0060] A counterweight slider 32 is fixed to the end of the cleaning spring 31 furthest from the mounting plate 22, and the counterweight slider 32 is located inside the cleaning spring 31. A telescopic stabilizing rod 34 is provided between the counterweight slider 32 and the movable circular plate 28, arranged axially along the debris cleaning tube 26. The telescopic end of the telescopic stabilizing rod 34 is fixedly connected to the movable circular plate 28, and the non-telescopic end of the telescopic stabilizing rod 34 is fixedly connected to the counterweight slider 32. The telescopic stabilizing rod 34 is used to prevent the counterweight slider 32 from shaking irregularly.

[0061] Both debris suction pipes 8 are radially connected to connecting pipes 14. Each connecting pipe 14 is externally connected to a suction pipe, and both suction pipes are externally connected to the suction port of an industrial vacuum cleaner fixedly installed on the machining center 1. The upper suction pipe is called the upper suction pipe 15, and the lower suction pipe is called the lower suction pipe 16.

[0062] Working principle: The operator inputs relevant parameters of the PCB board to be processed in vector XY format through the control panel 3, including rivet position coordinates, hole diameter specifications, drilling depth, and chamfer parameters. After receiving the parameters, the control system automatically calculates the precise coordinates that the drilling tool 9 needs to move, based on the installation positions of the top single-axis drilling module 6 and the bottom single-axis drilling module 7. At the same time, it sets the rotation speed of the drill bit 10, the spindle feed rate, the working frequency of the electromagnet 29, and the suction level of the industrial vacuum cleaner, providing accurate data support for subsequent processing.

[0063] The PCB board to be processed is placed from the inlet frame 2 onto the inlet conveyor 4, and the inlet conveyor 4 is activated to transport the PCB board to the processing position.

[0064] During the transport process, the existing servo-driven positioning device in machining center 1 performs initial positioning of the PCB board and corrects the placement posture of the PCB board.

[0065] When the PCB board reaches the processing position, the CCD vision inspection system in processing center 1, in conjunction with the UVW alignment platform, precisely positions the PCB board, ensuring that the rivet positions on the PCB board are accurately aligned with the axes of the drilling tools 9 of the top single-axis drilling module 6 and the bottom single-axis drilling module 7. The PCB board is then fixed in the processing position, awaiting processing. The CCD vision inspection system, UVW alignment platform, and servo-driven positioning device mentioned above are all existing technologies and will not be elaborated upon here.

[0066] Next, the sliding frames 13 on both sides of the processing position are driven by the power source in the processing center 1 to move the top and bottom debris suction tubes 8 vertically, so that the sealing round plates 17 at both ends of the debris suction tubes 8, away from the spindle chuck, are tightly attached to the upper and lower surfaces of the PCB board, thus achieving isolation and sealing between the drilling area and the outside world.

[0067] After sealing is completed, the industrial vacuum cleaner is started, and a negative pressure channel is established between the upper suction pipe 15 and the lower suction pipe 16 and the connecting pipe 14 on the debris suction pipe 8, in preparation for collecting processing debris.

[0068] The spindle chuck of the bottom single-axis drilling module 7 drives the drilling tool 9 to rotate at high speed. The drill bit 10 located below feeds upward, so that the drill bit 10 at the end of the drilling tool 9 contacts the lower surface of the PCB board, cuts the copper foil of the outer layer of the bottom of the PCB, and initially breaks the bottom fixing structure of the rivet.

[0069] After the bottom drill bit 10 completes the copper foil cutting, the drill bit 10 located below retracts downward to the initial position; then the spindle chuck of the top single-axis drill module 6 drives the drilling tool 9 to rotate at high speed, and the drill bit 10 located above feeds downward. The drill bit 10 drills through the PCB board and directly cuts the rivet, completely removing the rivet from the PCB board and forming a preliminary drill hole.

[0070] The drill bit 10 located above continues to feed, so that the cutting edge 11 at the connection between the drilling tool 9 and the drill bit 10 contacts the edge of the drill hole on the upper surface of the PCB board. The chamfering and deburring of the upper surface drill hole is achieved by the rotating cutting of the cutting edge 11.

[0071] After the upper surface is chamfered, the upper drill bit 10 is withdrawn upwards by a certain distance, and the lower drill bit 10 is fed upwards again. The cutting edge 11 on the bottom drilling tool 9 contacts the drilling edge on the lower surface of the PCB board, completing the chamfering and deburring of the lower surface drilling, realizing the integrated processing of drilling, deriving, and bidirectional chamfering and deburring.

[0072] After the bidirectional chamfering and deburring are completed, the upper drill bit 10 and the lower drill bit 10 respectively drive the top and bottom drilling tools 9 to move away in the opposite direction. The drill bit 10 and the cutting edge 11 retract into the debris suction tube 8 and move away from the drilling hole on the PCB board.

[0073] Afterwards, the drive unit is activated, and the two electric push rods 19 extend and retract synchronously, driving the corresponding slide 20 to slide inside the debris suction tube 8. The slide 20 drives the support shaft 21 to move axially. At the same time, the push plates 23 at both ends of the support shaft 21 slide with the fixed shaft 25 through the waist-shaped hole 24, driving the support shaft 21 to rotate around its own axis, thereby driving the mounting plate 22 on the support shaft 21 and the debris cleaning tube 26 to rotate synchronously, so that the axis of the debris cleaning tube 26 is precisely aligned with the drilling axis on the PCB board.

[0074] Next, the electromagnet 29 on the mounting plate 22 is energized, and through the magnetic repulsion force generated by the magnet 30 on the movable circular plate 28, the movable circular plate 28 is pushed to move axially along the debris cleaning tube 26; thereby driving the cleaning spring 31 fixed to the movable circular plate 28 to move axially along the debris cleaning tube 26 and reciprocate after the limiting slider 33 on the movable circular plate 28 collides with the bottom end of the debris cleaning tube 26. During this process, the cleaning spring 31 carries the counterweight slider 32 at its end through the inside of the drill hole.

[0075] During the extension and retraction process, the cleaning spring 31 fully contacts the inner wall of the drill hole to clean up residual debris; at the same time, the counterweight slider 32 enhances the vibration of the cleaning spring 31 during the extension and retraction process, shaking off the debris trapped on the cleaning spring 31; the shaken-off debris and the cleaned debris are sucked into the industrial vacuum cleaner through the negative pressure environment of the debris suction pipe 8 and the connecting pipe 14 by the upper suction pipe 15 or the lower suction pipe 16, realizing the real-time collection of debris;

[0076] It should be noted that all cleaning springs 32 extend and contract within their elastic limits.

[0077] After cleaning is completed, the electromagnet 29 reverses its magnetic poles and generates a magnetic attraction force with the magnet 30, pulling the moving circular plate 28 to move in the opposite direction along the debris cleaning tube 26 to reset. The cleaning spring 31 retracts into the debris cleaning tube 26. Then, the electric push rod 19 extends and retracts in the opposite direction, driving the support shaft 21 to rotate in the opposite direction. The debris cleaning tube 26 leaves the drilling area and returns to its initial position.

[0078] It should be noted that the two electromagnets 29 operate in opposite ways; one attracts the corresponding magnet 30, while the other repels it. Meanwhile, each cleaning spring 31 is wrapped with a matching cleaning cloth or cleaning rubber strip.

[0079] After the cleaning process is completed, the outlet conveyor 5 is activated to transport the processed PCB board from the processing position to the outlet frame, realizing automatic unloading;

[0080] During the unloading process, the PCB board is transferred to the subsequent process, and at the same time, the inlet conveyor 4 is started to transport the next PCB board to be processed to the processing position and enter the next processing cycle.

[0081] Throughout the drilling, chamfering, and cleaning process, the sealing plate 17 of the debris suction tube 8 remains in close contact with the PCB board surface, ensuring continuous operation of the industrial vacuum cleaner, improving the debris removal effect, preventing debris residue, and guaranteeing product quality.

[0082] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. Automatic drill-riveter machine comprising a machining center (1), characterized in that: The machining center (1) is provided with top and bottom single-shaft drill modules (6) and (7) arranged oppositely; each of the single-shaft drill modules (6) and (7) comprises a spindle chuck, and each spindle chuck is fixed with a drill bit (9) for drilling a rivet on a PCB; each drill bit (9) is provided with a drill bit (10) at an end away from the spindle chuck; The drill bit (10) is provided with a chip suction pipe (8) outside, and each of the two pipe openings of the chip suction pipe (8) is coaxially fixed with a sealing circular plate (17); the sealing circular plate (17) close to the spindle chuck is sleeved on the drill bit (9), and the sealing circular plate (17) away from the spindle chuck is provided with a through hole (18) for the drill bit (10) to pass through; The chip suction pipe (8) is rotatably provided with a support shaft (21), the support shaft (21) is fixedly provided with a mounting plate (22), the mounting plate (22) is fixedly provided with a chip cleaning pipe (26) for communication with the through hole (18), and the chip cleaning pipe (26) is coaxially provided with a cleaning spring (31) for cleaning the inner wall of the drill hole; The mounting plate (22) is provided with a power mechanism for driving the cleaning spring (31) to axially extend in the chip cleaning pipe (26); The sealing circular plate (17) away from the spindle chuck is provided with a driving member for driving the support shaft (21) to rotate.

2. The automatic boltmaker according to claim 1, characterized in that: The power mechanism comprises a moving circular plate (28) coaxially arranged in the chip cleaning pipe (26); the inner wall of the chip cleaning pipe (26) is provided with a guide sliding groove (27) in the axial direction; the circumferential end of the moving circular plate (28) is fixedly provided with a limiting sliding block (33) in limiting sliding cooperation with the guide sliding groove (27); the end of the cleaning spring (31) close to the mounting plate (22) is fixedly connected with the moving circular plate (28); the mounting plate (22) is fixedly provided with an electromagnet (29), and the moving circular plate (28) is fixedly provided with a magnet (30) for magnetic cooperation with the electromagnet (29).

3. The automatic boltmaker according to claim 2, characterized in that: The end of the cleaning spring (31) away from the mounting plate (22) is fixedly provided with a counterweight sliding block (32) inside the cleaning spring (31); the counterweight sliding block (32) is fixedly provided with an extension stabilizing rod (34) arranged in the axial direction of the chip cleaning pipe (26) and used for stabilizing the shaking of the counterweight sliding block (32) between the cleaning spring (31) and the moving circular plate (28).

4. The automatic boltmaker according to claim 1, characterized in that: The driving member comprises two electric push rods (19), which are fixedly installed on the closing disc (17) away from the spindle chuck and located inside the chip suction pipe (8); two sliding seats (20) are arranged in the chip suction pipe (8), the supporting shaft (21) penetrates through the two sliding seats (20) and is rotationally connected with the two sliding seats (20); the two electric push rods (19) correspond to the two sliding seats (20) one by one, and the telescopic shaft of each electric push rod (19) is fixedly connected with the corresponding sliding seat (20); the two axial ends of the supporting shaft (21) are fixedly provided with a push plate (23) with a waist-shaped hole (24) in the radial direction; the closing disc (17) away from the spindle chuck is provided with a displacement slot for the rotation of the two push plates (23), and a fixed shaft (25) parallel to the supporting shaft (21) is fixedly arranged in each displacement slot; the two push plates (23) correspond to the two fixed shafts (25) one by one, and each fixed shaft (25) is inserted into the waist-shaped hole (24) of the corresponding push plate (23) and abuts against the corresponding push plate (23) to drive.

5. The automatic boltmaker according to claim 4, characterized in that: The two electric push rods (19) are electrically synchronized, and the two fixed shafts (25) are coaxially opposite.

6. The automatic boltmaker according to claim 4, characterized in that: The chip cleaning pipe (26) is always spatially perpendicular to the supporting shaft (21).

7. The automatic boltmaker according to claim 1, characterized in that: The connecting pipe (14) is fixedly arranged on the chip suction pipe (8) in the radial direction, the connecting pipe (14) is externally connected with a dust suction pipe, and the dust suction pipe is fixedly installed on the industrial dust collector of the machining center (1).

8. The automatic boltmaker according to claim 1, characterized in that: The chip suction pipe (8) is externally fixed with a fixing ring (12), the fixing ring (12) is fixedly connected with a sliding frame (13) which is vertically slidably installed in the machining center (1); the sliding frame (13) is driven by a power source in the machining center (1).

9. The automatic boltmaker according to claim 1, characterized in that: The aperture of the perforation (18) is larger than the outer diameter of the chip cleaning pipe (26).

10. The automatic boltmaker according to claim 1, characterized in that: The connecting portion of the drill bit (10) and the drill tool (9) is provided with a cutting edge (11) for chamfering and deburring of the drill hole.

Images