A wire cutting device and wire cutting method for welding electronic circuit boards

Abstract

The present invention discloses a wire cutting device for welding electronic circuit boards and a wire cutting method thereof, which relates to the technical field of circuit board production, and specifically comprises a device body and a dust suction structure, wherein an observation window is arranged on the front side of the device body, and an electronic circuit board inlet and outlet are arranged on the left and right sides of the device body, and a fixed limiting structure, a cutting structure and a tool changing structure are arranged in the inner cavity of the device body; the fixed limiting structure comprises a hydraulic telescopic rod 1 fixedly connected to the bottom of the inner cavity of the device body, and a pressure plate adapted to the electronic circuit board is fixedly connected to the top of the hydraulic telescopic rod 1. The wire cutting device for welding electronic circuit boards and a wire cutting method thereof use a positioning plate to limit the distance between the cutter and the electronic circuit board, so that the cutting height of the pins can be kept consistent, thereby improving the cutting quality, and in the cutting process, a clamping plate is used to clamp the pins, thereby avoiding the pulling phenomenon of the cutter during the cutting process, thereby ensuring the welding quality of the electronic circuit board.

Description

Technical Field

[0001] The invention relates to the technical field of circuit board production, in particular to a wire cutting device and a wire cutting method for welding an electronic circuit board. Background Art

[0002] Electronic components are basic elements in electronic circuits. They are usually individually packaged and have two or more leads or metal contacts. Electronic components must be connected to each other to form an electronic circuit with specific functions. One of the common ways to connect electronic components is to solder them to a printed circuit board. However, since the lengths of the electrode pins of different electronic components are usually different, the lengths of the exposed pins on the electronic circuit board after soldering are different, which affects the aesthetics and safety of the electronic circuit board. Therefore, it is necessary to cut the pins on the electronic circuit board that are too long. In this process, a wire cutting device for soldering electronic circuit boards is required.

[0003] At present, the disclosed wire cutting devices for welding electronic circuit boards mostly adopt a method of cutting the wires one by one. This wire cutting method has low working efficiency, and in the cutting process, each cutting operation is independent, and the height of the pins after cutting cannot be effectively controlled, which reduces the wire cutting quality. In the wire cutting process, the pin cutting pliers are in a state of continuous wear. When the pin cutting pliers are not sharp, pulling is likely to occur when cutting the pins, which can easily cause cracks in the component pins and tin points, affecting the welding quality of the electronic circuit board. Based on this, the present application proposes a wire cutting device for welding electronic circuit boards and a wire cutting method thereof. Summary of the invention

[0004] The present invention provides a wire cutting device and a wire cutting method for electronic circuit board welding, which solves the problems proposed in the above background technology that each cutting operation is independent, the height of the pins after cutting cannot be effectively controlled, and the wire cutting quality is reduced; because the pin cutting pliers are not sharp, pulling phenomenon is likely to occur when cutting the pins, resulting in cracks in the component pins and solder points.

[0005] The present invention provides the following technical solution: a wire trimming device for welding an electronic circuit board, comprising a device body and a dust suction structure, wherein an observation window and an electronic circuit board inlet and outlet are arranged on the side wall of the device body, and a fixed limiting structure, a cutting structure and a tool changing structure are arranged in the inner cavity of the device body, wherein 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 tool changing structure is located on one side of the fixed limiting structure;

[0006] 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, and a positioning plate is connected to the outer side of one of the pressure plates through a hydraulic telescopic rod 2, and a through hole adapted to the pin is provided on the positioning plate;

[0007] The cutting structure comprises a moving plate and a mechanical arm, the top of the mechanical arm is connected to the device body, the bottom of the mechanical arm is connected to a moving plate, the bottom end of the moving plate is movably connected to a bidirectional ball screw, the outer rings at both ends of the bidirectional ball screw are threadedly connected to ball nuts, the outer rings of the ball nuts are fixedly connected to threaded tubes, the outer rings of the two threaded tubes are movably sleeved with a moving rod 1 and a moving rod 2 respectively, the moving rod 1 is located on the inner side of the moving rod 2, the bottom end of the moving rod 1 is connected to a cutter by bolts, the bottom of the moving rod 2 is fixed with a clamping plate, the top of the moving rod 1 and the top of the moving rod 2 are both fixed with an electromagnet 1, the top of the electromagnet 1 is fixed with an electromagnet 2, and the top of the moving plate is fixedly connected with a burr detector;

[0008] The tool changing structure includes a tool 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. A tool groove adapted to the cutter is provided on the side of the tool storage plate close to the cutting structure. The hydraulic telescopic rod five is located on the side of the tool storage plate away from the cutting structure. The end of the output shaft of the hydraulic telescopic rod five is fixedly connected to a support rod. The top of the support rod is connected to a movable plate via a hydraulic telescopic rod six. Screwdrivers adapted to bolts are fixed to both ends of the movable plate via a rotating motor two.

[0009] Preferably, the pressing plate is L-shaped, the through hole is a conical structure, and the inner diameter of the bottom of the through hole is larger than the inner diameter of the top thereof.

[0010] Preferably, the dust suction 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 end 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 mechanical arm, the other end of the hydraulic telescopic rod three is fixedly connected to the hydraulic telescopic rod four, the bottom of the hydraulic telescopic rod four is fixedly connected to a dust suction head, the dust suction head is located above the fixed limiting structure, and the inner cavity of the dust suction head is connected to the air inlet end of the exhaust fan through a dust suction pipe.

[0011] Preferably, a rotating motor 1 is fixedly connected to one side of the movable plate, and the end of the output shaft of the rotating motor 1 is fixedly connected to the end of the bidirectional ball screw.

[0012] 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.

[0013] Preferably, the second rotating motor is fixedly connected to the movable plate, and the end of the output shaft of the second rotating motor is fixedly connected to a screwdriver, and when the screwdriver contacts the bolt, the screwdriver and the bolt are magnetically attracted to each other.

[0014] Preferably, when the electromagnet 1 is in a powered-on state, the electromagnet 1 is magnetically attracted to the threaded tube, and when the electromagnet 2 is in a powered-on state, the electromagnet 2 is magnetically attracted to the movable plate.

[0015] A wire cutting method of a wire cutting device for welding an electronic circuit board, comprising the following steps:

[0016] Step 1: Move the electronic circuit board with the pins to be sheared to the bottom of the pressing plate until the electronic circuit board contacts the vertical end of the pressing plate;

[0017] Step 2, the fixed limiting structure works, the hydraulic telescopic rod contracts, and the hydraulic telescopic rod drives the pressure plate fixedly connected thereto to move downward until the pressure plate presses the electronic circuit board, and the position of the electronic circuit board in the device body is fixed. During the downward movement of the pressure plate, the positioning plate connected thereto is driven downward, and the pin to be sheared is inserted into the through hole, and the shearing part of the pin to be sheared is located above the positioning plate through the through hole, and the distance between the positioning plate and the electronic circuit board is adjusted according to the shearing height of the pin, and the positioning plate is used to limit the pin to be sheared;

[0018] Step three, the robotic arm drives the cutting structure to move, and the cutting structure cuts the pins. During the movement of the cutting structure, the bottom of the clamping plate contacts the top of the positioning plate, so that the cutting height of the pins in the electronic circuit board remains consistent. Before cutting, the robotic arm drives the cutter and the clamping plate to move through the moving plate until the pin to be cut is located between the two clamping plates. The electromagnet 1 connected to the moving rod 2 is in an energized state, and the electromagnet 2 adapted to the moving rod 1 is in an energized state. The electromagnet 1 is magnetically attracted to the threaded tube. When the rotating 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, and the ball nut moves When the threaded tube fixedly connected to it is driven to move, the threaded tube drives the moving rod 2 to move until the clamping plate clamps the pin, and after the energized electromagnet 1 and the energized electromagnet 2 are in the power-off state, the electromagnet 1 adapted to the moving rod 1 is in the power-on state, and the electromagnet 2 adapted to the moving rod 2 is in the power-on state, 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, and the ball nut drives the threaded tube fixedly connected to it to move, and the threaded tube drives the moving rod 1 fixed to it to move, and the moving rod 1 drives the cutter fixedly connected to it to move, and the two cutters approach each other, and the two cutters are used in coordination to achieve cutting of the pin;

[0019] Step 4: After the cutting is completed, the electromagnet 1 in the cutting structure is powered on, and the rotary motor 1 rotates in the opposite direction, releasing the clamping plate from clamping the pin, and resetting the cutter and the clamping plate, so as to facilitate the reuse of the cutting structure;

[0020] Step 5, the burr detector detects the cutting quality of the pin, and determines whether the cutter needs to be replaced based on the detection result. If the cutter needs to be replaced, the mechanical arm drives the cutting structure to move until the cutter to be replaced is inserted into the cutter slot, the hydraulic telescopic rod 6 drives the moving plate to move, the moving plate drives the rotating motor 2 fixedly connected thereto to move, the rotating motor 2 drives the screwdriver fixedly connected thereto to move, until the screwdriver contacts the bolt, the rotating motor 2 drives the screwdriver to rotate, and the screwdriver can screw the bolt. During the rotation of the screwdriver, the hydraulic telescopic rod 6 continues to extend, and the screwdriver drives the bolt to move until the bolt is separated from the moving rod 1, thereby realizing the disassembly of the cutter to be replaced, the mechanical arm drives the moving rod 1 to move, and the moving rod 1 is separated from the cutter until the moving rod 1 is aligned with the new cutter. During the movement of the moving rod 1, the hydraulic telescopic rod 6 and the hydraulic telescopic rod 5 are used in coordination, so that the screwdriver is inserted into the cutter slot adapted to the new cutter, and the connection between the moving rod 1 and the new cutter can be realized by using the screwdriver, thereby realizing the automatic replacement of the cutter.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The wire cutting device and wire cutting method for welding electronic circuit boards use a positioning plate to limit the distance between the cutter and the electronic circuit board, so that the cutting height of the pins can be kept consistent, thereby improving the cutting quality. During the cutting process, the pins are clamped by a clamping plate to avoid the cutter from pulling during the cutting process, thereby ensuring the welding quality of the electronic circuit board.

[0023] 2. The wire cutting device and wire cutting method for welding electronic circuit boards use a burr detector to detect the cutting quality of the pins, and indirectly judge whether the cutter needs to be replaced based on the cutting quality of the pins. The cutter can be replaced in time using a knife changing structure, so that the cutter always remains sharp, further reducing the phenomenon of cutting and pulling. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the right side of the structure of the present invention;

[0025] Figure 2 The structure of the present invention Figure 1 Schematic diagram on the left;

[0026] Figure 3 It is a schematic diagram of the internal structure of the present invention;

[0027] Figure 4 It is a bottom view schematic diagram of the fixed limiting structure of the structure of the present invention;

[0028] Figure 5 This is a schematic diagram of a knife plate structure of the present invention;

[0029] Figure 6 This is a schematic diagram of the tool changing structure of the present invention;

[0030] Figure 7 It is a schematic diagram of the structure cutting structure of the present invention;

[0031] Figure 8 It is a bottom view schematic diagram of the cutting structure of the structure of the present invention.

[0032] In the figure: 1. device body; 2. observation window; 3. hydraulic telescopic rod four; 4. dust extraction pipe; 5. dust suction head; 6. mechanical 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 two; 18. rotating motor two; 19. screwdriver; 20. knife groove; 21. hydraulic telescopic rod two; 22. through hole; 23. moving plate one; 24. rotating motor one; 25. bidirectional ball screw; 26. threaded pipe; 27. moving rod two; 28. cutter; 29. ​​clamping plate; 30. moving rod one; 31. bolt; 32. burr detector; 33. electromagnet two; 34. electromagnet one. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] The present invention provides a wire trimming device for electronic circuit board welding, comprising a device body 1, a viewing window 2 and an electronic circuit board inlet and outlet are arranged on the side wall of the device body 1, Figure 1 In the orientation shown, the observation window 2 is arranged at the front side of the device body 1, and the left and right sides of the device body 1 are provided with electronic circuit board inlets and outlets. When the device is in use, the electronic circuit board after welding can be transported by a conveyor belt in the prior art, and the electronic circuit board is moved into or out of the device through the electronic circuit board inlet and outlet, so that the device can continuously trim the electronic circuit board, thereby improving the working efficiency of the device, and the user can observe the trimming condition of the electronic circuit board pins through the observation window 2.

[0035] A fixed limiting structure is provided in the inner cavity of the device body 1, and the fixed limiting structure is located in the middle of the inner 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 in the device body 1, and limit the cutting height of the pin to ensure the consistency of the pin cutting.

[0036] The fixed limiting structure includes two hydraulic telescopic rods 13, the bottom of the hydraulic telescopic rod 13 is fixedly connected to the bottom of the inner cavity of the device body 1, and the top of the hydraulic telescopic rod 13 is fixedly connected to a pressure plate 9 adapted to the electronic circuit board. Through the setting of the hydraulic telescopic rod 13, the extension and retraction of the hydraulic telescopic rod 13 can change the position of the pressure plate 9 fixedly connected thereto. When the device is in use, the electronic circuit board is located between the two pressure plates 9, and the pressure plate 9 can be used to press the electronic circuit board to fix the position of the electronic circuit board.

[0037] The pressing plate 9 is L-shaped, and the vertical end of the pressing plate 9 can position the electronic circuit board so that the positions of the electronic circuit boards of the same batch in the device body 1 remain consistent, which is convenient for the device to perform wire cutting operations.

[0038] The outer side of a pressing plate 9 is connected to a positioning plate 8 through a hydraulic telescopic rod 21. The positioning plate 8 is provided with a through hole 22 adapted to the pin. Through the setting of the through hole 22, after the electronic circuit board is fixed, under the action of the hydraulic telescopic rod 21, the positioning plate 8 can be moved downward, and the pins on the electronic circuit board can be located in the inner cavity of the through hole, so that the cutting position of the pins on the electronic circuit board remains consistent, improving the wire cutting quality, and by adjusting the distance between the positioning plate 8 and the electronic circuit board, the cutting length of the pin can be controlled, so that the device can adapt to various needs and improve the adaptability of the device.

[0039] The through hole 22 is a tapered structure, and the inner diameter of the bottom of the through hole 22 is larger than the inner diameter of the top thereof, so as to prevent the positioning plate 8 from pressing on the welding point.

[0040] A cutting structure is provided in the inner cavity of the device body 1, and the cutting structure is located above the fixed limiting structure. The cutting structure includes a movable plate 23, and the movable plate 23 is connected to the device body 1 through a mechanical arm 6. The mechanical 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 mechanical arm 6. Through the setting of the mechanical arm 6, the position of the cutting structure can be changed, which is convenient for the cutting structure to cut the pins.

[0041] The bottom end of the moving plate 1 23 is movably connected with a bidirectional ball screw 25, and the outer rings of both ends of the bidirectional ball screw 25 are threadedly connected with ball nuts, and the outer rings of the ball nuts are fixedly connected with a threaded tube 26. A rotating motor 1 24 is fixedly connected to one side of the moving plate 1 23, and the end of the output shaft of the rotating motor 1 24 is fixedly connected to the end of the bidirectional ball screw 25 through a reducer. Through the setting of the rotating motor 1 24, the rotation of the rotating motor 1 24 can drive the bidirectional ball screw 25 fixedly connected thereto to rotate, and the rotation of the bidirectional ball screw 25 allows the two ball nuts threadedly connected thereto to move in the direction where the bidirectional ball screw 25 is located. When the ball nut moves, it can drive the threaded tube 26 fixedly connected thereto to move, and the distance between the two threaded tubes 26 can change.

[0042] The outer rings of the two threaded tubes 26 are respectively movably sleeved with a moving rod 1 30 and a moving rod 27, the moving rod 1 30 is located on the inner side of the moving rod 27, the top of the moving rod 1 30 and the top of the moving rod 27 are both fixed with an electromagnet 1 34, the top of the electromagnet 1 34 is fixed with an electromagnet 2 33, and when the electromagnet 1 34 is in a powered state, the electromagnet 1 34 and the threaded tube 26 are magnetically attracted, and when the electromagnet 2 33 is in a powered state, the electromagnet 2 33 and the moving plate 1 23 are magnetically attracted, and the magnetic attraction force and the electric current between the electromagnet 1 34 and the moving plate 1 23 are The magnetic attraction force between magnet 2 33 and threaded tube 26 is smaller than the axial moving force exerted on ball nut when bidirectional ball screw 25 rotates. Therefore, when electromagnet 2 33 is energized, the rotation of bidirectional ball screw 25 can move threaded tube 26. Since when electromagnet 1 34 is energized, the magnetic attraction force between electromagnet 1 34 and threaded tube 26 is greater than the magnetic attraction force between electromagnet 1 34 and movable plate 1 23. Therefore, when threaded tube 26 moves, movable rod 1 30 or movable rod 2 27 connected to energized electromagnet 1 34 can be driven to move. Through the setting of electromagnet 1 34 and electromagnet 2 33, when the electromagnet 1 34 matched with the moving rod 1 30 is in the energized state and the electromagnet 2 33 matched with the moving rod 2 27 is in the energized state, the movement of the threaded tube 26 can only drive the moving rod 1 30 to move, while the position of the moving rod 27 remains unchanged. When the moving rod 1 30 moves, it can drive the cutter 28 connected thereto to move. When the electromagnet 1 34 matched with the moving rod 27 is in the energized state and the electromagnet 2 33 matched with the moving rod 1 30 is in the energized state, the threaded tube 26 can drive the moving rod 27 to move. When the moving rod 27 moves, it can drive the clamping plate 29 fixedly connected thereto to move.

[0043] The bottom end of the moving rod 1 30 is connected to the cutter 28 via a bolt 31 , and the bottom of the moving rod 27 is fixed with a clamping plate 29 , and the bottom of the cutter 28 and the top of the clamping plate 29 are in the same plane.

[0044] From the above description, it can be known that under the action of the bidirectional ball screw 25, the two cutters 28 can approach and move away from each other, and the coordinated use of the two cutters 28 can achieve the shearing of the pins. The two clamping plates 29 can approach and move away from each other, and the coordinated use of the two clamping plates 29 can achieve the clamping of the pins, thereby avoiding the phenomenon of the cutter 28 pulling the pins during the process of cutting the pins, avoiding cracks in the component feet and tin points during the cutting process, and ensuring the welding quality of the electronic circuit board.

[0045] 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. Through the setting of the burr detector 32, the cut pins can be inspected. According to the inspection result, 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.

[0046] A tool changing structure is provided in the inner cavity of the device body 1, and the tool changing structure is located on the side of the fixed limiting structure away from the observation window 2. The tool changing structure includes a tool storage plate 12 fixedly connected to the bottom of the inner cavity of the device body 1 and a hydraulic telescopic rod 5 14 fixedly connected to the bottom of the inner cavity of the device body 1. A tool groove 20 adapted to the cutting knife 28 is provided on the side of the tool storage plate 12 close to the cutting structure, and a clamping plate placement groove adapted to the clamping plate 29 is provided below the tool groove 20. The clamping plate placement groove is a rectangular structure for accommodating the clamping plate 29, so that the old knife can be inserted into the tool groove 20, and the new knife can be inserted into the tool groove 20 with the moving rod. 30 contact, the hydraulic telescopic rod five 14 is located on the side of the knife storage plate 12 away from the cutting structure, the output shaft end of the hydraulic telescopic rod five 14 is fixedly connected to the support rod 15, the top of the support rod 15 is connected to the moving plate two 17 through the hydraulic telescopic rod six 16, the two ends of the moving plate two 17 are fixed with a screwdriver 19 adapted to the bolt 31 through the rotating motor two 18, and the rotating motor two 18 is fixedly connected to the moving plate two 17, and the output shaft end of the rotating motor two 18 is fixedly connected to the screwdriver 19. When the screwdriver 19 contacts the bolt 31, the screwdriver 19 and the bolt 31 are magnetically engaged. The two sides of the cutter 28 are attracted to each other by the setting of the tool changing structure. When the cutter 28 to be replaced is inserted into the cutter slot 20 under the action of the mechanical arm 6, the hydraulic telescopic rod 6 16 drives the moving plate 2 17 to move, and the moving plate 2 17 drives the rotating motor 2 18 fixedly connected thereto to move, and the rotating motor 2 18 drives the screwdriver 19 fixedly connected thereto to move until the screwdriver 19 contacts the bolt 31, and the rotating motor 2 18 drives the screwdriver 19 to rotate, and the screwdriver 19 can screw the bolt 31. During the rotation of the screwdriver 19, the hydraulic telescopic rod 6 16 continues to extend, and the screwdriver 1 9 drives the bolt 31 to move until the bolt 31 is separated from the moving rod 30, thereby realizing the disassembly of the cutter 28 to be replaced. The mechanical arm 6 drives the moving rod 30 to move, and the moving rod 30 is separated 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 hydraulic telescopic rod 6 16 and the hydraulic telescopic rod 5 14 are used in coordination, so that the screwdriver 19 is inserted into the knife groove adapted to the new cutter 28. The screwdriver 19 can be used to realize the connection between the moving rod 30 and the new cutter 28, thereby realizing the automatic replacement of the cutter 28.

[0047] A wire cutting device for welding an electronic circuit board proposed in the present application also includes a dust suction structure, which includes a hydraulic telescopic rod three 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 end of the exhaust fan 10, the other end of the hydraulic telescopic rod three 7 is fixedly connected to the hydraulic telescopic rod four 3, and the bottom of the hydraulic telescopic rod four 3 is fixedly connected to the dust suction head 5, the hydraulic telescopic rod three 7, the hydraulic telescopic rod four 3 and the dust suction head 5 are all located above the fixed limiting structure, the inner cavity of the dust suction head 5 is connected to the air inlet end of the exhaust fan 10 through the dust suction pipe 4, through the setting of the dust suction structure, the hydraulic telescopic rod three 7 can change the position of the dust suction head 5 in the horizontal direction, the hydraulic telescopic rod four 3 can change the position of the dust suction head 5 in the vertical direction, the operation of the exhaust fan 10 can remove the air and impurities around the dust suction head 5, and the dust suction structure can clean up the cutting debris and pins dropped on the positioning plate 8 when it is working, so as to facilitate the reuse of the positioning plate 8.

[0048] From the above description, it can be known that when the device is in use, the positioning plate 8 is used to limit the distance between the cutter 28 and the electronic circuit board, so that the cutting height of the pin can be kept consistent, thereby improving the cutting quality. In the cutting process, the clamping plate 29 is used to clamp the pin to avoid the cutter 28 from pulling during the cutting process, thereby ensuring the welding quality of the electronic circuit board. During the operation of the device, the burr detector 32 is used to detect the cutting quality of the pin, and whether the cutter 28 needs to be replaced is indirectly determined based on the cutting quality of the pin. The cutter 28 can be replaced in time using the knife changing structure, thereby keeping the cutter 28 sharp at all times, further reducing the phenomenon of cutting and pulling.

[0049] The electrical components involved in this application are all prior art, and technicians in this field are familiar with their connection methods. Through these technicians, all the electrical components in this application are connected to their compatible power supplies through wires, and according to the actual situation, a suitable controller is selected to meet the control requirements. The specific connection and control sequence are described below. The electrical connection is completed in a sequential working order, and the detailed connection means are well known in the art. The following mainly introduces the working principle and process, and no further explanation of the electrical control is given.

[0050] A wire cutting method of a wire cutting device for welding an electronic circuit board, comprising the following steps:

[0051] Step 1: Move the electronic circuit board with the pins to be sheared to the bottom of the pressing plate 9 until the electronic circuit board contacts the vertical end of the pressing plate 9;

[0052] Step 2, the fixed limiting structure works, the hydraulic telescopic rod 13 contracts, and the hydraulic telescopic rod 13 drives the pressure plate 9 fixedly connected thereto to move downward until the pressure plate 9 presses the electronic circuit board, and the position of the electronic circuit board in the device body 1 is fixed. During the downward movement of the pressure plate 9, the positioning plate 8 connected thereto is driven downward, and the pin to be sheared is inserted into the through hole 22, and the shearing part of the pin to be sheared 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 shearing height of the pin, and the positioning plate 8 is used to limit the pin to be sheared;

[0053] Step three, the robot arm 6 drives the cutting structure to move, and the cutting structure cuts the pins. During the movement of the cutting structure, the bottom of the clamping plate 29 contacts the top of the positioning plate 8, so that the cutting height of the pins in the electronic circuit board remains consistent. Before cutting, the robot arm 6 drives the cutter 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 34 connected to the moving rod 27 is in a powered state, and the electromagnet 23 adapted to the moving rod 30 is in a powered state. The electromagnet 34 is magnetically attracted to the threaded tube 26. When the rotating 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 threaded tube 26 fixedly connected thereto 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 1 34 and the energized electromagnet 2 33 are in the power-off state, the electromagnet 1 34 adapted to the moving rod 1 30 is in the power-on state, and the electromagnet 2 33 adapted to the moving rod 27 is in the power-on state. 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 fixedly connected thereto to move, and the threaded tube 26 drives the moving rod 1 30 fixed thereto to move. The moving rod 1 30 drives the cutter 28 fixed thereto to move, and the two cutters 28 approach each other. The two cutters 28 are used in coordination to achieve cutting of the pin.

[0054] Step 4: After the cutting is completed, the electromagnet 34 in the cutting structure is powered on, and the rotary motor 24 rotates in the opposite direction, releasing the clamping plate 29 from clamping the pin, and resetting the cutter 28 and the clamping plate 29, so as to facilitate the reuse of the cutting structure;

[0055] Step 5, the burr detector 32 detects the cutting quality of the pin, and determines whether the cutter 28 needs to be replaced based on 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 6 drives the moving plate 2 17 to move, the moving plate 2 17 drives the rotating motor 2 18 fixedly connected thereto to move, the rotating motor 2 18 drives the screwdriver 19 fixedly connected thereto to move until the screwdriver 19 contacts the bolt 31, the rotating motor 2 18 drives the screwdriver 19 to rotate, the screwdriver 19 can screw the bolt 31, and the screwdriver 19 rotates During the movement, the hydraulic telescopic rod 6 16 continues to extend, and the screwdriver 19 drives the bolt 31 to move until the bolt 31 is separated from the moving rod 30, thereby realizing the disassembly of the cutter 28 to be replaced. The mechanical arm 6 drives the moving rod 30 to move, and the moving rod 30 is separated 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 hydraulic telescopic rod 6 16 and the hydraulic telescopic rod 5 14 are used in coordination, so that the screwdriver 19 is inserted into the knife groove adapted to the new cutter 28. The screwdriver 19 can be used to realize the connection between the moving rod 30 and the new cutter 28, thereby realizing the automatic replacement of the cutter 28.

[0056] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. Machinery, parts and equipment all adopt conventional models in the prior art and will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field. Although the embodiments of the present invention have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and modifications can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A wire trimming device for welding electronic circuit boards, comprising a device body (1) and a dust suction structure, characterized in that: An observation window (2) and an electronic circuit board inlet and outlet are provided on the side wall of the device body (1); a fixed limiting structure, a cutting structure and a tool changing structure are provided in the inner cavity of the device body (1); the fixed limiting structure is located in the middle of the inner cavity of the device body (1); the cutting structure is located above the fixed limiting structure; and the tool changing structure is located on one side of the fixed limiting structure; The fixed limiting structure comprises a hydraulic telescopic rod (13) fixedly connected to the bottom of the inner cavity of the device body (1), a pressure plate (9) adapted to the electronic circuit board is fixedly connected to the top of the hydraulic telescopic rod (13), hydraulic telescopic rods (13) are provided on both sides of the inner cavity of the device body (1), and a positioning plate (8) is connected to the outer side of one of the pressure plates (9) through a hydraulic telescopic rod (21), and a through hole (22) adapted to the pin is provided on the positioning plate (8); The cutting structure comprises a moving plate (23) and a mechanical arm (6), the top of the mechanical arm (6) is connected to the device body (1), the bottom of the mechanical arm (6) is connected to the moving plate (23), the bottom end of the moving plate (23) is movably connected to a bidirectional ball screw (25), the outer rings of both ends of the bidirectional ball screw (25) are threadedly connected to ball nuts, the outer rings of the ball nuts are fixedly connected to threaded tubes (26), the outer rings of the two threaded tubes (26) are respectively movably sleeved with a moving rod (30) and a moving rod (27), the moving rod (30) is located on the inner side of the moving rod (27), the bottom end of the moving rod (30) is connected to a cutter (28) via a bolt (31), and the bottom of the moving rod (27) is fixedly provided with a clamp. The holding plate (29) is provided with an electromagnet (34) fixed to the top of the moving rod (30) and the top of the moving rod (27), an electromagnet (34) is fixed to the top of the electromagnet (34), and a burr detector (32) is fixed to the top of the moving plate (23); when the electromagnet (34) is powered on, the electromagnet (34) and the threaded tube (26) are magnetically attracted to each other, and when the electromagnet (33) is powered on, the electromagnet (33) and the moving plate (23) are magnetically attracted to each other, and the magnetic attraction force between the electromagnet (34) and the moving plate (23) and the magnetic attraction force between the electromagnet (33) and the threaded tube (26) are both smaller than the axial movement force on the ball nut when the bidirectional ball screw (25) rotates; The tool changing structure comprises a tool storage plate (12) fixedly connected to the bottom of the inner cavity of the device body (1) and a hydraulic telescopic rod five (14) fixedly connected to the bottom of the inner cavity of the device body (1); a tool groove (20) adapted to the cutting knife (28) is provided on the side of the tool storage plate (12) close to the cutting structure; the hydraulic telescopic rod five (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 five (14) is fixedly connected to a support rod (15); the top end of the support rod (15) is connected to a movable plate two (17) via a hydraulic telescopic rod six (16); screwdrivers (19) adapted to the bolts (31) are fixed to the two ends of the movable plate two (17) via a rotating motor two (18).

2. A wire cutting device for electronic circuit board welding according to claim 1, characterized in that: 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 greater than the inner diameter of the top thereof.

3. The wire cutting device for electronic circuit board welding according to claim 1, characterized in that: The dust suction structure comprises a hydraulic telescopic rod three (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 end of the exhaust fan (10); the hydraulic telescopic rod three (7) is located on a 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 to the hydraulic telescopic rod four (3); the bottom of the hydraulic telescopic rod four (3) is fixedly connected to a dust suction head (5); the dust suction head (5) is located above the fixed limiting structure; the inner cavity of the dust suction head (5) is connected to the air inlet end of the exhaust fan (10) via a dust suction pipe (4).

4. The wire cutting device for electronic circuit board welding according to claim 1, characterized in that: A rotating motor (24) is fixedly connected to one side of the moving plate (23), and the end of the output shaft of the rotating motor (24) is fixedly connected to the end of a bidirectional ball screw (25).

5. The wire cutting device for electronic circuit board welding according to claim 1, characterized in that: The burr detector (32) is located above the cutter (28), and the bottom of the cutter (28) and the top of the clamping plate (29) are in the same plane.

6. The wire cutting device for electronic circuit board welding according to claim 1, characterized in that: The second rotating motor (18) is fixedly connected to the second moving plate (17), and the end of the output shaft of the second rotating motor (18) is fixedly connected to the screwdriver (19). When the screwdriver (19) contacts the bolt (31), the screwdriver (19) and the bolt (31) are magnetically attracted to each other.

7. The wire cutting device for electronic circuit board welding according to claim 1, characterized in that: When the electromagnet 1 (34) is in a powered-on state, the electromagnet 1 (34) and the threaded tube (26) are magnetically attracted to each other, and when the electromagnet 2 (33) is in a powered-on state, the electromagnet 2 (33) and the moving plate 1 (23) are magnetically attracted to each other.

8. A wire cutting method for a wire cutting device for welding an electronic circuit board according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: Move the electronic circuit board whose pins are to be sheared to the bottom of the pressing plate (9) until the electronic circuit board contacts the vertical end of the pressing plate (9); Step 2, the fixed limiting structure works, the hydraulic telescopic rod 1 (13) contracts, and the hydraulic telescopic rod 1 (13) drives the pressure plate (9) fixedly connected thereto to move downward until the pressure plate (9) presses the electronic circuit board, and the position of the electronic circuit board in the device body (1) is fixed. During the downward movement of the pressure plate (9), the positioning plate (8) connected thereto is driven to move downward, and the pin to be cut is inserted into the through hole (22), and the cutting position of the pin to be cut 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 pin, and the positioning plate (8) is used to limit the pin to be cut; Step 3, the mechanical arm (6) drives the cutting structure to move, and the cutting structure cuts the pins. During the movement of the cutting structure, the bottom of the clamping plate (29) contacts the top of the positioning plate (8), so that the cutting height of the pins in the electronic circuit board remains consistent. Before cutting, the mechanical arm (6) drives the cutter (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 (34) connected to the moving rod (27) is in a powered state, and the electromagnet (33) matched with the moving rod (30) is in a powered state. The electromagnet (34) and the threaded tube (26) are magnetically attracted. When the rotating 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 where the bidirectional ball screw (25) is located. When the ball nut moves, it drives the electromagnet (34) and the threaded tube (26) to be magnetically attracted. The fixedly connected threaded tube (26) moves, and the threaded tube (26) drives the second moving rod (27) to move until the clamping plate (29) clamps the pin. After the energized electromagnet (34) and the energized electromagnet (33) are in the power-off state, the electromagnet (34) adapted to the first moving rod (30) is in the power-on state, and the electromagnet (33) adapted to the second moving rod (27) is in the power-on state. 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 where the bidirectional ball screw (25) is located. The ball nut drives the threaded tube (26) fixedly connected thereto to move, and the threaded tube (26) drives the first moving rod (30) fixed thereto to move. The first moving rod (30) drives the cutter (28) fixed thereto to move, and the two cutters (28) approach each other. The two cutters (28) are used in coordination to achieve cutting of the pin. Step 4: After the cutting is completed, the electromagnet 1 (34) in the cutting structure is in a powered state, and the rotary motor 1 (24) rotates in the reverse direction, releasing the clamping plate (29) from clamping the pin, and resetting the cutter (28) and the clamping plate (29), so as to facilitate the reuse of the cutting structure; Step 5: The burr detector (32) detects the cutting quality of the pin and determines whether the cutter (28) needs to be replaced based on 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 cutter groove (20). The hydraulic telescopic rod (16) drives the movable plate (17) to move. The movable plate (17) drives the rotating motor (18) fixedly connected thereto to move. The rotating motor (18) drives the screwdriver (19) fixedly connected thereto to move until the screwdriver (19) contacts the bolt (31). The rotating motor (18) drives the screwdriver (19) to rotate. The screwdriver (19) can screw the bolt (31). The screwdriver (19) rotates during the rotation. During the process, the hydraulic telescopic rod six (16) continues to extend, and the screwdriver (19) drives the bolt (31) to move until the bolt (31) is separated from the moving rod one (30), thereby realizing the removal of the cutter (28) to be replaced. The mechanical arm (6) drives the moving rod one (30) to move, and the moving rod one (30) is separated from the cutter (28) until the moving rod one (30) is aligned with the new cutter (28). During the movement of the moving rod one (30), the hydraulic telescopic rod six (16) and the hydraulic telescopic rod five (14) are used in coordination, so that the screwdriver (19) is inserted into the knife groove adapted to the new cutter (28). The screwdriver (19) can be used to realize the connection between the moving rod one (30) and the new cutter (28), thereby realizing the automatic replacement of the cutter (28).

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