Wire cutting device for welding of electronic circuit board, and wire cutting method therefor

Abstract

A wire cutting device for the welding of an electronic circuit board, and a wire cutting method therefor. The device comprises a device body and a dust suction structure, wherein an observation window is provided in the front side of the device body; an electronic circuit board entrance and exit are provided in the left and right sides of the device body; a fixing and limiting structure, a cutting structure and a cutter change structure are provided in an inner cavity of the device body; the fixing and limiting structure comprises hydraulic telescopic rods I, which are fixedly connected to the bottom of the inner cavity of the device body; and a pressing plate adapted to an electronic circuit board is fixedly connected to the top of each hydraulic telescopic rod I. In the wire cutting device for the welding of an electronic circuit board and the wire cutting method therefor, a positioning plate is used to limit the distance between a cutter and the electronic circuit board, such that the cutting heights of pins can be kept consistent, thereby improving the cutting quality; moreover, during a cutting process, clamping plates are used to clamp the pins, such that pulling or dragging by the cutter during the cutting process are prevented, thereby ensuring the welding quality of the electronic circuit board.

Description

A wire cutting device and method for soldering electronic circuit boards Technical Field

[0001] This invention relates to the field of circuit board manufacturing technology, specifically to a wire cutting device and method for soldering electronic circuit boards. Background Technology

[0002] Electronic components are the basic elements of electronic circuits. They are usually individually packaged and have two or more leads or metal contacts. Electronic components must be interconnected to form an electronic circuit with a specific function. One common way to connect electronic components is to solder them onto a printed circuit board (PCB). However, since the electrode lead lengths of different electronic components are usually different, the exposed lead lengths on the PCB after soldering vary, affecting the aesthetics and safety of the PCB. Therefore, it is necessary to trim the excessively long leads on the PCB, which requires a wire cutter for PCB soldering.

[0003] Currently, most publicly available wire cutting devices for electronic circuit board soldering employ a one-by-one wire cutting method. This method is inefficient, and each cutting operation is independent, making it impossible to effectively control the height of the cut leads, thus reducing the quality of the wire cutting. Furthermore, the wire cutting pliers are constantly worn during the cutting process. When the pliers are not sharp, pulling can easily occur during cutting, which can lead to cracks in the component leads and solder joints, affecting the soldering quality of the electronic circuit board. Based on this, this application proposes a wire cutting device and method for electronic circuit board soldering.

[0004] Summary of the Invention

[0005] This invention provides a wire cutting device and method for soldering electronic circuit boards, which solves the problems mentioned in the background art, such as each cutting operation being independent, the pin height after cutting not being effectively controlled, reducing the quality of wire cutting; and the problem that due to the lack of sharpness of the lead-cutting pliers, pulling phenomenon easily occurs during lead cutting, resulting in cracks in component leads and solder joints.

[0006] The present invention provides the following technical solution: a wire cutting device for soldering electronic circuit boards, comprising a device body and a dust collection structure. The side wall of the device body is provided with an observation window and an electronic circuit board inlet and outlet. The inner cavity of the device body is provided with a fixed limiting structure, a cutting structure and a blade changing structure. The fixed limiting structure is located in the middle of the inner cavity of the device body, the cutting structure is located above the fixed limiting structure, and the blade changing structure is located on one side of the fixed limiting structure.

[0007] The fixed limiting structure includes a hydraulic telescopic rod 1 fixedly connected to the bottom of the inner cavity of the device body. A pressure plate adapted to the electronic circuit board is fixedly connected to the top of the hydraulic telescopic rod 1. Hydraulic telescopic rods 1 are provided on both sides of the inner cavity of the device body. A positioning plate is connected to the outside of one of the pressure plates through a hydraulic telescopic rod 2. The positioning plate is provided with a through hole adapted to the pin.

[0008] The cutting structure includes a movable plate and a robotic arm. The top of the robotic arm is connected to the device body, and the bottom of the robotic arm is connected to the movable plate. A bidirectional ball screw is movably connected to the bottom end of the movable plate. Ball nuts are threaded to the outer rings of both ends of the bidirectional ball screw. Threaded tubes are fixedly connected to the outer rings of the ball nuts. Movable rod one and movable rod two are movably sleeved on the outer rings of the two threaded tubes, respectively. Movable rod one is located inside movable rod two. A cutter is bolted to the bottom end of movable rod one. A clamping plate is fixed to the bottom of movable rod two. Electromagnet one is fixed to the top of both movable rod one and movable rod two. Electromagnet two is fixed to the top of electromagnet one. A burr detector is fixedly connected to the top of the movable plate.

[0009] The blade changing structure includes a blade storage plate fixedly connected to the bottom of the inner cavity of the device body and a hydraulic telescopic rod five fixedly connected to the bottom of the inner cavity of the device body. The blade storage plate has a blade groove adapted to the cutting blade on the side near the cutting structure. The hydraulic telescopic rod five is located on the side of the blade storage plate away from the cutting structure. A support rod is fixedly connected to the end of the output shaft of the hydraulic telescopic rod five. A moving plate is connected to the top of the support rod through a hydraulic telescopic rod six. Screwdrivers adapted to bolts are fixed to both ends of the moving plate through a rotary motor two.

[0010] Preferably, the pressure plate is L-shaped, the through hole is tapered, and the inner diameter of the bottom of the through hole is larger than the inner diameter of its top.

[0011] Preferably, the dust collection structure includes a hydraulic telescopic rod three fixedly connected to the top of the inner cavity of the device body, an exhaust fan fixedly connected to the outer surface of the device body, and an air filter box fixedly connected to the air outlet of the exhaust fan. The hydraulic telescopic rod three is located on the side of the inner cavity of the device body away from the robotic arm. The other end of the hydraulic telescopic rod three is fixedly connected to a hydraulic telescopic rod four. The bottom of the hydraulic telescopic rod four is fixedly connected to a dust collection head. The dust collection head is located above the fixed limiting structure. The inner cavity of the dust collection head is connected to the air inlet of the exhaust fan through a dust collection pipe.

[0012] Preferably, a rotary motor is fixedly connected to one side of the movable plate, and the end of the output shaft of the rotary motor is fixedly connected to the end of the bidirectional ball screw.

[0013] Preferably, the burr detector is located above the cutter, and the bottom of the cutter and the top of the clamping plate are in the same plane.

[0014] Preferably, the second rotary motor is fixedly connected to the movable plate, and the end of the output shaft of the second rotary motor is fixedly connected to a screwdriver. When the screwdriver contacts the bolt, the screwdriver and the bolt are magnetically attracted to each other.

[0015] Preferably, when the first electromagnet is energized, it is magnetically attracted to the threaded tube, and when the second electromagnet is energized, it is magnetically attracted to the moving plate.

[0016] A wire-cutting method for a wire-cutting device used in electronic circuit board soldering includes the following steps:

[0017] Step 1: Move the electronic circuit board with the pin to be cut to the bottom of the pressure plate until the electronic circuit board contacts the vertical end of the pressure plate.

[0018] Step 2: The fixed limiting structure operates. When the hydraulic telescopic rod retracts, it moves the pressure plate fixedly connected to it downward until the pressure plate presses down on the electronic circuit board, fixing the position of the electronic circuit board within the device body. During the downward movement of the pressure plate, it moves the positioning plate connected to it downward, inserting the pin to be cut into the through hole. The cutting part of the pin to be cut is located above the positioning plate through the through hole. The distance between the positioning plate and the electronic circuit board is adjusted according to the cutting height of the pin, and the positioning plate is used to limit the pin to be cut.

[0019] Step 3: The robotic arm moves the cutting structure, which cuts the pins. During the movement, the bottom of the clamping plate contacts the top of the positioning plate, ensuring consistent pin cutting height on the circuit board. Before cutting, the robotic arm moves the cutter and clamping plate via the moving plate until the pin to be cut is between the two clamping plates. Electromagnet 1, connected to the moving rod 2, is energized, and electromagnet 2, adapted to the moving rod 1, is also energized. Electromagnet 1 is magnetically attracted to the threaded tube. When the rotary motor 1 drives the bidirectional ball screw to rotate, the ball nut threadedly connected to the bidirectional ball screw moves in the direction of the bidirectional ball screw. The threaded tube fixedly connected to it moves, and the threaded tube moves the second moving rod until the clamping plate clamps the pin. After the first and second energized electromagnets are de-energized, the first electromagnet adapted to the first moving rod is energized, and the second electromagnet adapted to the second moving rod is energized. At this time, the bidirectional ball screw rotates, and the ball nut threadedly connected to the bidirectional ball screw moves in the direction of the bidirectional ball screw. The ball nut moves the threaded tube fixedly connected to it, and the threaded tube moves the first moving rod fixedly connected to it. The first moving rod moves the cutter fixedly connected to it. The two cutters move closer to each other, and the cooperation of the two cutters achieves the cutting of the pin.

[0020] Step 4: After cutting is completed, the electromagnet in the cutting structure is energized, the rotary motor rotates in the opposite direction, releasing the clamping plate from the pin and resetting the cutter and clamping plate, making the cutting structure easy to reuse.

[0021] Step 5: The burr detector inspects the cutting quality of the pins and determines whether the cutter needs to be replaced based on the inspection results. If the cutter needs to be replaced, the robotic arm moves the cutting structure until the cutter to be replaced is inserted into the slot. The hydraulic telescopic rod six moves the moving plate, which in turn moves the rotary motor two fixedly connected to it. The rotary motor two moves the screwdriver fixedly connected to it until the screwdriver contacts the bolt. The rotary motor two then rotates the screwdriver, which can tighten the bolt. During the rotation of the screwdriver, the hydraulic telescopic rod six continues to extend, and the screwdriver moves the bolt until the bolt separates from the moving rod one, thus removing the cutter to be replaced. The robotic arm then moves the moving rod one, separating it from the cutter until the moving rod one aligns with the new cutter. During the movement of the moving rod one, the cooperation of the hydraulic telescopic rods six and five allows the screwdriver to be inserted into the slot that matches the new cutter. The screwdriver connects the moving rod one to the new cutter, thus achieving automatic cutter replacement.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The wire cutting device and its method for soldering electronic circuit boards utilize a positioning plate to limit the distance between the cutter and the electronic circuit board, ensuring that the cutting height of the pins remains consistent and improving the cutting quality. Furthermore, during the cutting process, a clamping plate is used to clamp the pins, preventing the cutter from being pulled during the cutting process and ensuring the soldering quality of the electronic circuit board.

[0024] 2. The wire cutting device and its method for soldering electronic circuit boards utilize a burr detector to check the cutting quality of the pins. Based on the cutting quality of the pins, it indirectly determines whether the cutter needs to be replaced. Furthermore, the cutter can be replaced in a timely manner using a cutter replacement structure, ensuring that the cutter always remains sharp and further reducing the occurrence of cutting and pulling phenomena. Attached Figure Description

[0025] Figure 1 is a schematic diagram of the structure of the present invention on the right side;

[0026] Figure 2 is a schematic diagram of the structure of the present invention on the left side of Figure 1.

[0027] Figure 3 is a schematic diagram of the internal structure of the present invention;

[0028] Figure 4 is a bottom view of the fixed limiting structure of the present invention;

[0029] Figure 5 is a schematic diagram of the blade storage plate of the present invention;

[0030] Figure 6 is a schematic diagram of the tool changing structure of the present invention;

[0031] Figure 7 is a schematic diagram of the cutting structure of the present invention;

[0032] Figure 8 is a bottom view of the cutting structure of the present invention.

[0033] In the diagram: 1. Device body; 2. Observation window; 3. Hydraulic telescopic rod four; 4. Dust extraction pipe; 5. Dust suction head; 6. Robotic arm; 7. Hydraulic telescopic rod three; 8. Positioning plate; 9. Pressure plate; 10. Exhaust fan; 11. Air filter box; 12. Knife storage plate; 13. Hydraulic telescopic rod one; 14. Hydraulic telescopic rod five; 15. Support rod; 16. Hydraulic telescopic rod six; 17. Moving plate; 18. Rotary motor two; 19. Screwdriver; 20. Knife groove; 21. Hydraulic telescopic rod two; 22. Through hole; 23. Moving plate; 24. Rotary motor one; 25. Bidirectional ball screw; 26. Threaded pipe; 27. Moving rod two; 28. Cutting knife; 29. ​​Clamping plate; 30. Moving rod one; 31. Bolt; 32. Burr detector; 33. Electromagnet two; 34. Electromagnet one. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] This invention provides a wire-cutting device for soldering electronic circuit boards, comprising a device body 1. The device body 1 has an observation window 2 and electronic circuit board inlets / outlets on its side wall. As shown in Figure 1, the observation window 2 is located on the front side of the device body 1, and electronic circuit board inlets / outlets are located on both the left and right sides of the device body 1. In use, the device utilizes a conveyor belt (as in existing technology) to transport the soldered electronic circuit boards. The electronic circuit boards move in or out of the device through the electronic circuit board inlets / outlets, allowing the device to continuously cut wires from the electronic circuit boards, thus improving its working efficiency. The user can observe the cutting of the electronic circuit board leads through the observation window 2.

[0036] The device body 1 has a fixed limiting structure inside its cavity. The fixed limiting structure is located in the middle of the cavity of the device body 1. The fixed limiting structure is used to press the electronic circuit board, fix the position of the electronic circuit board inside the device body 1, and limit the cutting height of the pins to ensure the consistency of the pin cutting.

[0037] The fixed limiting structure includes two hydraulic telescopic rods 13. The bottom of the hydraulic telescopic rods 13 is fixedly connected to the bottom of the inner cavity of the device body 1, and the top of the hydraulic telescopic rods 13 is fixedly connected to a pressure plate 9 adapted to the electronic circuit board. By setting the hydraulic telescopic rods 13, the extension and retraction of the hydraulic telescopic rods 13 can change the position of the pressure plate 9 fixedly connected to them. When the device is in use, the electronic circuit board is located between the two pressure plates 9. The pressure plates 9 can be used to press the electronic circuit board to fix its position.

[0038] The pressure plate 9 is L-shaped. The vertical end of the pressure plate 9 can position the electronic circuit board, so that the electronic circuit boards of the same batch are in the same position in the device body 1, which facilitates the wire cutting operation of the device.

[0039] A positioning plate 8 is connected to the outside of a pressure plate 9 via a hydraulic telescopic rod 21. The positioning plate 8 has through holes 22 that are adapted to the pins. After the electronic circuit board is fixed by the through holes 22, the positioning plate 8 can move down under the action of the hydraulic telescopic rod 21. The pins on the electronic circuit board can be located in the inner cavity of the through holes, thereby making the pin cutting parts on the electronic circuit board consistent, improving the cutting quality. Furthermore, by adjusting the distance between the positioning plate 8 and the electronic circuit board, the cutting length of the pins can be controlled, making the device adaptable to various needs and improving its adaptability.

[0040] The through hole 22 has a tapered structure, with the inner diameter at the bottom of the through hole 22 being larger than the inner diameter at the top, to prevent the positioning plate 8 from pressing against the solder joint.

[0041] The device body 1 has a cutting structure inside its cavity. The cutting structure is located above the fixed limiting structure. The cutting structure includes a movable plate 23. The movable plate 23 is connected to the device body 1 through a robotic arm 6. The robotic arm 6 is connected to the top of the inner cavity of the device body 1, and the movable plate 23 is connected to the bottom of the robotic arm 6. By setting the robotic arm 6, the position of the cutting structure can be changed, which makes it easier for the cutting structure to cut the pin.

[0042] A bidirectional ball screw 25 is movably connected to the bottom end of the movable plate 23. Both ends of the bidirectional ball screw 25 have ball nuts threaded onto their outer rings. Threaded tubes 26 are fixedly connected to the outer rings of the ball nuts. A rotary motor 24 is fixedly connected to one side of the movable plate 23. The output shaft of the rotary motor 24 is fixedly connected to the end of the bidirectional ball screw 25 via a reducer. The rotation of the rotary motor 24 drives the fixedly connected bidirectional ball screw 25 to rotate. This rotation allows the two threaded ball nuts to move in the direction of the bidirectional ball screw 25. The movement of the ball nuts moves the fixedly connected threaded tubes 26, changing the distance between the two threaded tubes 26.

[0043] Two threaded tubes 26 have movable rods 30 and 27 respectively fitted around their outer rings. Movable rod 30 is located inside movable rod 27. Electromagnet 34 is fixed to the top of both movable rod 30 and movable rod 27. Electromagnet 33 is fixed to the top of electromagnet 34. When electromagnet 34 is energized, it is magnetically attracted to the threaded tube 26. When electromagnet 33 is energized, it is magnetically attracted to the movable plate 23. The magnetic attraction between electromagnet 34 and the movable plate 23 is both force and electrical. The magnetic attraction between magnet 233 and threaded tube 26 is less than the axial moving force on the ball nut when the bidirectional ball screw 25 rotates. Therefore, when electromagnet 233 is energized, the rotation of the bidirectional ball screw 25 can move the threaded tube 26. Also, when electromagnet 134 is energized, the magnetic attraction between electromagnet 134 and threaded tube 26 is greater than the magnetic attraction between electromagnet 134 and moving plate 23. Therefore, when the threaded tube 26 moves, it can drive the moving rod 130 or moving rod 27 connected to the energized electromagnet 134 to move. With the configuration of electromagnet 1 34 and electromagnet 2 33, when electromagnet 1 34 adapted to moving rod 1 30 is energized and electromagnet 2 33 adapted to moving rod 2 27 is energized, the movement of threaded tube 26 can only drive moving rod 1 30 to move, while the position of moving rod 27 remains unchanged. When moving rod 1 30 moves, it can drive the cutter 28 connected to it to move. When electromagnet 1 34 adapted to moving rod 2 27 is energized and electromagnet 2 33 adapted to moving rod 1 30 is energized, threaded tube 26 can drive moving rod 27 to move. When moving rod 27 moves, it can drive the clamping plate 29 fixedly connected to it to move.

[0044] The bottom end of the first moving rod 30 is connected to a cutter 28 by bolt 31, and the bottom of the second moving rod 27 is fixed with a clamping plate 29. The bottom of the cutter 28 and the top of the clamping plate 29 are in the same plane.

[0045] As described above, under the action of the bidirectional ball screw 25, the two cutters 28 can move closer to each other and further away from each other. The cooperation of the two cutters 28 can cut the pins. The two clamping plates 29 can move closer to each other and further away from each other. The cooperation of the two clamping plates 29 can clamp the pins, preventing the cutters 28 from pulling the pins during the cutting process, avoiding cracks in the component leads and solder joints during the cutting process, and ensuring the soldering quality of the electronic circuit board.

[0046] A burr detector 32 is fixedly connected to the top of the movable plate 23. The burr detector 32 is located above the cutter 28. The burr detector 32 can be used to detect the cut pins. Based on the detection results, it can be determined whether the cutter 28 needs to be replaced. When the cutter 28 needs to be replaced, the number of burrs on the pins increases.

[0047] The inner cavity of the device body 1 is equipped with a blade changing structure, which is located on the side of the fixed limiting structure away from the observation window 2. The blade changing structure includes a blade storage plate 12 fixedly connected to the bottom of the inner cavity of the device body 1 and a hydraulic telescopic rod 14 fixedly connected to the bottom of the inner cavity of the device body 1. The blade storage plate 12 has a blade groove 20 adapted to the cutting blade 28 on the side near the cutting structure. Below the blade groove 20 is a clamping plate placement groove adapted to the clamping plate 29. The clamping plate placement groove is a rectangular structure used to accommodate the clamping plate 29, so that the old blade can be inserted into the blade groove 20 and the new blade can be moved with the rod. A hydraulic telescopic rod 14 is located on the side of the blade storage plate 12 away from the cutting structure. A support rod 15 is fixedly connected to the end of the output shaft of the hydraulic telescopic rod 14. A movable plate 17 is connected to the top of the support rod 15 via a hydraulic telescopic rod 16. Screwdrivers 19, compatible with bolts 31, are fixed to both ends of the movable plate 17 via a rotary motor 18. The rotary motor 18 is fixedly connected to the movable plate 17, and the end of the output shaft of the rotary motor 18 is fixedly connected to the screwdrivers 19. When the screwdrivers 19 contact the bolts 31, the screwdrivers 19 and bolts 31 are magnetically coupled. Attraction occurs through the tool-changing structure. When the cutter 28 to be replaced is inserted into the tool slot 20 under the action of the robotic arm 6, the hydraulic telescopic rod 16 drives the moving plate 17 to move. The moving plate 17 drives the rotary motor 18 fixedly connected to it to move. The rotary motor 18 drives the screwdriver 19 fixedly connected to it to move until the screwdriver 19 contacts the bolt 31. The rotary motor 18 then drives the screwdriver 19 to rotate, allowing the screwdriver 19 to tighten the bolt 31. During the rotation of the screwdriver 19, the hydraulic telescopic rod 16 continues to extend, and the screwdriver 19... The moving bolt 31 moves until it separates from the moving rod 30, thus disassembling the cutter 28 to be replaced. The robotic arm 6 drives the moving rod 30 to move, separating it from the cutter 28 until it aligns with the new cutter 28. During the movement of the moving rod 30, the hydraulic telescopic rods 16 and 14 work together to insert the screwdriver 19 into the slot that matches the new cutter 28. The screwdriver 19 connects the moving rod 30 to the new cutter 28, thus enabling the automatic replacement of the cutter 28.

[0048] The wire cutting device for electronic circuit board soldering proposed in this application also includes a dust collection structure. The dust collection structure includes a hydraulic telescopic rod 3 7 fixedly connected to the top of the inner cavity of the device body 1, an exhaust fan 10 fixedly connected to the outer surface of the device body 1, and an air filter box 11 fixedly connected to the air outlet of the exhaust fan 10. The other end of the hydraulic telescopic rod 3 7 is fixedly connected to a hydraulic telescopic rod 4 3, and the bottom of the hydraulic telescopic rod 4 3 is fixedly connected to a dust collection head 5. The hydraulic telescopic rod 3 7, the hydraulic telescopic rod 4 3, and the dust collection head 5 are all located above the fixed limiting structure. The inner cavity of the dust collection head 5 is connected to the air inlet of the exhaust fan 10 through a dust collection pipe 4. Through the setting of the dust collection structure, the hydraulic telescopic rod 3 7 can change the position of the dust collection head 5 in the horizontal direction, and the hydraulic telescopic rod 4 3 can change the position of the dust collection head 5 in the vertical direction. When the exhaust fan 10 is working, it can remove the air and impurities around the dust collection head 5. When the dust collection structure is working, it can clean up the cutting debris and pins that fall on the positioning plate 8, which is convenient for the reuse of the positioning plate 8.

[0049] As described above, when in use, the device uses the positioning plate 8 to limit the distance between the cutter 28 and the electronic circuit board, ensuring that the cutting height of the pins remains consistent and improving the cutting quality. During the cutting process, the clamping plate 29 clamps the pins to prevent the cutter 28 from being pulled during cutting, thus ensuring the soldering quality of the electronic circuit board. During operation, the device uses a burr detector 32 to detect the cutting quality of the pins, indirectly determining whether the cutter 28 needs to be replaced based on the cutting quality. The cutter replacement structure allows for timely replacement of the cutter 28, ensuring that the cutter 28 always remains sharp and further reducing the occurrence of cutting pull.

[0050] All electrical components involved in this application are prior art. Those skilled in the art understand their connection methods. With the help of those skilled in the art, all electrical components in this application and their compatible power supplies can be connected by wires. According to the actual situation, a suitable controller can be selected to meet the control requirements. For specific connections and control sequences, please refer to the description below. The electrical connection between each electrical component is completed in the order of operation. The detailed connection methods are well known in the art. The following mainly introduces the working principle and process, and will not describe the electrical control.

[0051] A wire-cutting method for a wire-cutting device used in electronic circuit board soldering includes the following steps:

[0052] Step 1: Move the electronic circuit board with the pin to be cut to below the pressure plate 9 until the electronic circuit board contacts the vertical end of the pressure plate 9.

[0053] Step 2: The fixed limiting structure operates. The hydraulic telescopic rod 13 retracts, and the hydraulic telescopic rod 13 drives the pressure plate 9, which is fixedly connected to it, to move down until the pressure plate 9 presses down on the electronic circuit board. The position of the electronic circuit board within the device body 1 is fixed. During the downward movement of the pressure plate 9, the positioning plate 8 connected to it moves down. The pin to be cut is inserted into the through hole 22, and the cutting part of the pin to be cut is located above the positioning plate 8 through the through hole 22. The distance between the positioning plate 8 and the electronic circuit board is adjusted according to the cutting height of the pin. The positioning plate 8 is used to limit the pin to be cut.

[0054] Step 3: The robotic arm 6 moves the cutting structure to cut the pins. During the movement, the bottom of the clamping plate 29 contacts the top of the positioning plate 8, ensuring that the pins on the circuit board are cut at a consistent height. Before cutting, the robotic arm 6 moves the cutter 28 and the clamping plate 29 via the moving plate 23 until the pin to be cut is between the two clamping plates 29. The electromagnet 34 connected to the moving rod 27 is energized, and the electromagnet 33 adapted to the moving rod 30 is energized. The electromagnet 34 is magnetically attracted to the threaded tube 26. When the rotary motor 24 drives the bidirectional ball screw 25 to rotate, the ball nut threadedly connected to the bidirectional ball screw 25 moves in the direction of the bidirectional ball screw 25. When the ball nut moves, it drives the... The threaded tube 26, which is fixedly connected, moves, and the threaded tube 26 drives the moving rod 27 to move until the clamping plate 29 clamps the pin. After the energized electromagnet 34 and the energized electromagnet 33 are de-energized, the electromagnet 34, which is adapted to the moving rod 30, is energized, and the electromagnet 33, which is adapted to the moving rod 27, is energized. At this time, the bidirectional ball screw 25 rotates, and the ball nut threadedly connected to the bidirectional ball screw 25 moves in the direction of the bidirectional ball screw 25. The ball nut drives the threaded tube 26, which is fixedly connected to it, to move. The threaded tube 26 drives the moving rod 30, which is fixedly connected to it, to move. The moving rod 30 drives the cutter 28, which is fixedly connected to it, to move. The two cutters 28 move closer to each other. The cooperation of the two cutters 28 realizes the cutting of the pin.

[0055] Step 4: After the cutting is completed, the electromagnet 34 in the cutting structure is energized, the rotary motor 24 rotates in the reverse direction, releases the clamping plate 29 from the pin, and resets the cutter 28 and the clamping plate 29, making it easy to reuse the cutting structure.

[0056] Step 5: The burr detector 32 inspects the cutting quality of the pins and determines whether the cutter 28 needs to be replaced based on the inspection results. If the cutter 28 needs to be replaced, the robotic arm 6 moves the cutting structure until the cutter 28 to be replaced is inserted into the cutter groove 20. The hydraulic telescopic rod 16 moves the moving plate 17, which in turn moves the rotary motor 18 fixedly connected to it. The rotary motor 18 moves the screwdriver 19 fixedly connected to it until the screwdriver 19 contacts the bolt 31. The rotary motor 18 then rotates the screwdriver 19, allowing it to tighten the bolt 31. During the process, the hydraulic telescopic rod 16 continues to extend, and the screwdriver 19 drives the bolt 31 to move until the bolt 31 separates from the moving rod 30, thus disassembling the cutter 28 to be replaced. The robotic arm 6 drives the moving rod 30 to move, and the moving rod 30 separates from the cutter 28 until the moving rod 30 is aligned with the new cutter 28. During the movement of the moving rod 30, the cooperation of the hydraulic telescopic rod 16 and the hydraulic telescopic rod 14 allows the screwdriver 19 to be inserted into the blade groove that matches the new cutter 28. The screwdriver 19 can be used to connect the moving rod 30 with the new cutter 28, thereby realizing the automatic replacement of the cutter 28.

[0057] All standard parts used in this invention can be purchased from the market, and irregularly shaped parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wire shearing device for soldering an electronic circuit board, comprising a device body (1) and a dust suction structure, characterized in that: The side wall of the device body (1) is provided with an observation window (2) and an electronic circuit board inlet and outlet, and the inner cavity of the device body (1) is provided with a fixed limiting structure, a cutting structure and a tool changing structure. The fixed limiting structure includes a hydraulic telescopic rod I (13) fixedly connected with the inner cavity bottom of the device body (1), the top of the hydraulic telescopic rod I (13) is fixedly connected with a pressing plate (9) matched with the electronic circuit board, both sides of the inner cavity of the device body (1) are provided with the hydraulic telescopic rod I (13), and the outer side of one of the pressing plates (9) is connected with a positioning plate (8) through a hydraulic telescopic rod II (21), and the positioning plate (8) is provided with a through hole (22) matched with the pin. The cutting structure includes a moving plate (23) and a mechanical arm (6), the top of the mechanical arm (6) is connected with the device body (1), the bottom of the mechanical arm (6) is connected with the moving plate (23), the bottom end of the moving plate (23) is movably connected with a bidirectional ball screw (25), the outer rings at both ends of the bidirectional ball screw (25) are threadedly connected with ball nuts, the outer rings of the ball nuts are fixedly connected with threaded pipes (26), the outer rings of the two threaded pipes (26) are movably sleeved with a moving rod I (30) and a moving rod II (27) respectively, the moving rod I (30) is located on the inner side of the moving rod II (27), the bottom end of the moving rod I (30) is connected with a cutting knife (28) through a bolt (31), the bottom of the moving rod II (27) is fixedly connected with a clamping plate (29), the top of the moving rod I (30) and the top of the moving rod II (27) are fixedly connected with an electromagnet I (34), the top of the electromagnet I (34) is fixedly connected with an electromagnet II (33), and the top of the moving plate (23) is fixedly connected with a burr detector (32). The tool changing structure includes a tool storage plate (12) fixedly connected with the inner cavity bottom of the device body (1) and a hydraulic telescopic rod V (14) fixedly connected with the inner cavity bottom of the device body (1), one side of the tool storage plate (12) close to the cutting structure is provided with a tool groove (20) matched with the cutting knife (28), the hydraulic telescopic rod V (14) is located on the side of the tool storage plate (12) away from the cutting structure, the output shaft end of the hydraulic telescopic rod V (14) is fixedly connected with a supporting rod (15), the top end of the supporting rod (15) is connected with a moving plate (17) through a hydraulic telescopic rod VI (16), and both ends of the moving plate (17) are fixedly connected with a screwdriver (19) matched with the bolt (31) through a rotary motor II (18). The pressing plate (9) is L-shaped, the through hole (22) is a conical structure, and the inner diameter of the bottom of the through hole (22) is larger than that of the top.

2. The apparatus according to claim 1, wherein: ​ 3. The apparatus according to claim 1, wherein: The dust suction structure comprises a hydraulic telescopic rod three (7) fixedly connected with the top of the inner cavity of the device body (1), an air suction fan (10) fixedly connected with the outer surface of the device body (1), and an air filter box (11) fixedly connected with the air outlet end of the air suction fan (10), wherein the hydraulic telescopic rod three (7) is located on the side of the inner cavity of the device body (1) away from the mechanical arm (6), the other end of the hydraulic telescopic rod three (7) is fixedly connected with a hydraulic telescopic rod four (3), the bottom of the hydraulic telescopic rod four (3) is fixedly connected with a dust suction head (5), the dust suction head (5) is located above the fixed limiting structure, and the inner cavity of the dust suction head (5) is connected with the air inlet end of the air suction fan (10) through a dust suction pipe (4).

4. The apparatus according to claim 1, wherein: One side of the moving plate (23) is fixedly connected with a rotary motor one (24), and the output shaft end of the rotary motor one (24) is fixedly connected with the end of the bidirectional ball screw (25).

5. The apparatus according to claim 1, wherein: The burr detector (32) is located above the cutter (28), and the bottom of the cutter (28) is in the same plane as the top of the clamping plate (29).

6. The apparatus according to claim 1, wherein: The rotary motor two (18) is fixedly connected with the moving plate (17), the output shaft end of the rotary motor two (18) is fixedly connected with the screwdriver (19), and when the screwdriver (19) is in contact with the bolt (31), the screwdriver (19) and the bolt (31) are magnetically attracted.

7. The apparatus according to claim 1, wherein: When the electromagnet one (34) is in an energized state, the electromagnet one (34) and the threaded pipe (26) are magnetically attracted, and when the electromagnet two (33) is in an energized state, the electromagnet two (33) and the moving plate (23) are magnetically attracted.

8. The method of claim 1-7, wherein the method is characterized by: The method comprises the following steps: Step one, move the electronic circuit board with the to-be-cut pins to the lower side of the pressing plate (9) until the electronic circuit board is in contact with the vertical end of the pressing plate (9); Step two, the fixed limiting structure works, the hydraulic telescopic rod one (13) is retracted, the hydraulic telescopic rod one (13) drives the pressing plate (9) fixedly connected therewith to move downward until the pressing plate (9) presses the electronic circuit board, the position of the electronic circuit board in the device body (1) is fixed, and the pressing plate (9) drives the positioning plate (8) connected therewith to move downward during the downward movement, the to-be-cut pins are inserted into the through hole (22), the cutting part of the to-be-cut pins is located above the positioning plate (8) through the through hole (22), and the distance between the positioning plate (8) and the electronic circuit board is adjusted according to the cutting height of the pins, and the positioning plate (8) is used to limit the to-be-cut pins. Step three, the mechanical arm (6) drives the cutting structure to move, the cutting structure cuts the pin, and in the moving process, the bottom of the clamping plate (29) contacts the top of the positioning plate (8), so that the cutting height of the pin in the electronic circuit board remains consistent. Before cutting, the mechanical arm (6) drives the cutting knife (28) and the clamping plate (29) to move through the moving plate (23) until the pin to be cut is located between the two clamping plates (29). The electromagnet one (34) connected with the moving rod two (27) is in the energized state, and the electromagnet two (33) matched with the moving rod one (30) is in the energized state. The electromagnet one (34) is magnetically attracted to the threaded tube (26). When the rotary motor one (24) drives the bidirectional ball screw (25) to rotate, the ball nut threaded with the bidirectional ball screw (25) moves in the direction of the bidirectional ball screw (25). When the ball nut moves, the threaded tube (26) fixedly connected with the ball nut moves. The threaded tube (26) drives the moving rod two (27) to move until the clamping plate (29) clamps the pin. After the energized electromagnet one (34) and the energized electromagnet two (33) are in the de-energized state, the electromagnet one (34) matched with the moving rod one (30) is in the energized state, and the electromagnet two (33) matched with the moving rod two (27) is in the energized state. At this time, the bidirectional ball screw (25) rotates, and the ball nut threaded with the bidirectional ball screw (25) moves in the direction of the bidirectional ball screw (25). The ball nut drives the threaded tube (26) fixedly connected with the ball nut to move. The threaded tube (26) drives the moving rod one (30) fixedly connected with the threaded tube (26) to move. The moving rod one (30) drives the cutting knife (28) fixedly connected with the moving rod one (30) to move. The two cutting knives (28) approach each other. The cooperation of the two cutting knives (28) realizes the cutting of the pin. Step four, after cutting, the electromagnet one (34) in the cutting structure is in the energized state, the rotary motor one (24) reverses rotation, releases the clamping of the clamping plate (29) to the pin, and resets the cutting knife (28) and the clamping plate (29) for reuse of the cutting structure. ​ Step five, the burr detector (32) detects the cutting quality of the pin, and judges whether the cutter (28) needs to be replaced according to the detection result. If the cutter (28) needs to be replaced, the mechanical arm (6) drives the cutting structure to move until the cutter (28) to be replaced is inserted into the knife groove (20). The hydraulic telescopic rod six (16) drives the moving plate (17) to move, the moving plate (17) drives the rotating motor two (18) fixedly connected therewith to move, the rotating motor two (18) drives the screwdriver (19) fixedly connected therewith to move until the screwdriver (19) contacts with the bolt (31). The rotating motor two (18) drives the screwdriver (19) to rotate, and the screwdriver (19) can screw the bolt (31). In the rotating process of the screwdriver (19), the hydraulic telescopic rod six (16) continues to lengthen, the screwdriver (19) drives the bolt (31) to move until the bolt (31) is separated from the moving rod one (30), realizing the disassembly of the cutter (28) to be replaced. The mechanical arm (6) drives the moving rod one (30) to move, the moving rod one (30) is separated from the cutter (28) until the moving rod one (30) is aligned with the new cutter (28). In the moving process of the moving rod one (30), the cooperation of the hydraulic telescopic rod six (16) and the hydraulic telescopic rod five (14) makes the screwdriver (19) inserted into the knife groove matched with the new cutter (28), and the screwdriver (19) can realize the connection between the moving rod one (30) and the new cutter (28), and further realize the automatic replacement of the cutter (28).

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