Pin cutting device for PCB (printed circuit board) after component welding

Abstract

The invention relates to the technical field of printed circuit production, and discloses a PCB pin cutting device after component welding, which comprises a mechanical arm, a mounting seat is arranged at the moving end of the mechanical arm, a pneumatic cutting nipper is mounted on the mounting seat, a pair of positioning rods is slidably inserted into the mounting seat, the pneumatic cutting nipper is fixedly connected with the positioning rods, and the positioning rods are fixedly connected with the mechanical arm. A vertical plate is installed on the installation base, a protruding block is arranged on the side, close to the pneumatic cutting nippers, of the vertical plate, an arc-shaped rod is installed on a tool bit of the pneumatic cutting nippers, a driving pawl is hinged to the other end of the arc-shaped rod and intermittently abuts against the protruding block, a first torsional spring is arranged at the end of the arc-shaped rod, and one end of the first torsional spring is connected with the arc-shaped rod. The other end of the first torsional spring is connected with the driving pawl, and a limiting block is fixedly arranged on the arc-shaped rod. The shearing points of the pneumatic cutting nipper tool bit are automatically switched, so that different parts of the pneumatic cutting nipper tool bit participate in shearing, the service life of the pneumatic cutting nipper tool bit is prolonged, and the replacement rate of the tool bit is reduced.

Description

Technical Field

[0001] This invention relates to the field of printed circuit manufacturing technology, and more specifically, to a device for cutting off the leads of a PCB circuit board after component soldering. Background Technology

[0002] Removing leads after PCB soldering is a necessary step in electronic manufacturing. Lead removal helps save installation space, avoids interference from extra leads with housing assembly and the layout of other components, and is suitable for miniaturized, high-density PCB designs. In addition, lead removal can also eliminate safety hazards, as exposed long leads are prone to short circuits with surrounding components and metal housings, or can scratch personnel and equipment during subsequent operations.

[0003] For example, patent publication number CN119072015B discloses a device for cutting leads of a PCB circuit board after component soldering. The device includes a support frame, with positioning clamping components fixedly mounted at both ends of the top of the support frame. An air supply component is fixedly mounted on the top of the support frame. The air supply component inputs gas into the positioning clamping components through the support frame. Elastic pads and movable plates distributed vertically provide elastic clamping, and the sealing of the negative pressure hole creates a negative pressure environment within the hole. This environment adsorbs and fixes the edges of the PCB board, exerting an outward pulling force on both sides of the PCB board. Therefore, during actual lead cutting, the clamping force from the sides prevents bending and deformation of the PCB board, maintaining stable cutting while keeping the PCB board horizontally stable.

[0004] The aforementioned patent solves the problem of PCB board bending and deformation. However, in the actual cutting process, the PCB pins are frequently cut locally by the cutting blade, resulting in significant local wear of the cutting blade and increasing the replacement frequency of the cutting blade. Meanwhile, other parts of the cutting blade are still relatively sharp, resulting in insufficient utilization of the cutting blade edge. Therefore, we propose a device for cutting off the pins of PCB circuit boards after component soldering. Summary of the Invention

[0005] This invention provides a device for cutting off the pins of a PCB circuit board after component soldering. This device can solve the problem mentioned in the background art that, during the actual cutting process, the PCB pins are frequently cut locally by a cutting blade along a fixed path, resulting in significant local wear of the cutting blade, increasing the frequency of cutting blade replacement, while other parts of the cutting blade remain relatively sharp, leading to insufficient utilization of the cutting blade edge.

[0006] To achieve the above objectives, this solution provides a device for cutting off leads of PCB circuit boards after component soldering, including a robotic arm. The moving end of the robotic arm is provided with a mounting base, and a pneumatic cutting clamp is mounted on the mounting base. A pair of positioning rods are slidably inserted into the mounting base, and the pneumatic cutting clamp is fixedly connected to the positioning rods. A vertical plate is mounted on the mounting base. A protrusion is provided on the side of the vertical plate near the pneumatic shears. An arc-shaped rod is mounted on the blade of the pneumatic shears. A drive pawl is hinged to the other end of the arc-shaped rod. The drive pawl intermittently abuts against the protrusion. A torsion spring is provided at the end of the arc-shaped rod. One end of the torsion spring is connected to the arc-shaped rod, and the other end of the torsion spring is connected to the drive pawl. A limit block is fixedly provided on the arc-shaped rod.

[0007] Optionally, multiple protrusions are provided, and the multiple protrusions are evenly arranged on the vertical plate.

[0008] Optionally, vertical rods are installed at both ends of the vertical plate, a linear bearing is installed on the mounting base, the vertical rod is slidably installed in the linear bearing, a compression spring is sleeved on the vertical rod, and the other end of the compression spring is connected to the linear bearing.

[0009] Optionally, a guide groove is provided on the side wall of the vertical plate, and a guide rod is provided on the pneumatic shear, with the end of the guide rod slidably installed in the guide groove.

[0010] Optionally, the guide groove includes a forward slide, a vertical groove, a return slide, and an inclined groove, wherein the forward slide, the vertical groove, the return slide, and the inclined groove are connected in sequence.

[0011] Optionally, a one-way plate is hinged to the bottom end of the inclined groove, and a second torsion spring is provided at the bottom end of the inclined groove. One end of the second torsion spring is connected to the one-way plate, and the other end of the second torsion spring is connected to the vertical plate. When the guide rod moves to the bottom end of the inclined groove, the one-way plate deflects towards the direction of the outgoing slide groove.

[0012] Optionally, a switch magnet is installed on the pneumatic shears, and an adsorption block is fixedly installed on the mounting base. The adsorption block is made of cast iron and is arranged correspondingly to the magnetic adsorption end of the switch magnet.

[0013] Optionally, the mounting base is provided with a first wedge block and a second wedge block, and the switch of the switch magnet is provided with a push rod, which intermittently abuts against the first wedge block and the second wedge block.

[0014] Optionally, a spring sheet is installed on the mounting base, and a push plate is provided at the bottom end of the spring sheet. After the pneumatic cutters cut the PCB pins, the push plate impacts the pins.

[0015] Optionally, a rotating plate is hinged to the bottom of the push plate, a limit plate is provided on the push plate, a pressure rod is installed on the arc-shaped rod, the pressure rod abuts against the rotating plate, and when the pneumatic shear head is opened, the spring plate changes from a normal state to a bent state.

[0016] Through the above technical solution, when the PCB circuit board pin cutting device provided by this solution is used after component soldering: after the pneumatic pliers cut the PCB pins, the blade of the pneumatic pliers drives the arc rod to move in the opposite direction. The drive pawl hinged at the end of the arc rod contacts the bump again. When the drive pawl contacts the bump, the limit block restricts the drive pawl from deflecting in the opposite direction. Therefore, the bump generates a reaction force on the drive pawl, the arc rod, and the pneumatic pliers, causing the pneumatic pliers to move. This causes the contact point between the PCB pin and the pneumatic pliers blade to shift when the pneumatic pliers cut the PCB pins again. This prevents the PCB pin from causing frequent wear on the fixed position of the pneumatic pliers blade. It also allows the cutting point of the pneumatic pliers blade to switch automatically, so that different parts of the pneumatic pliers blade participate in the cutting, thereby increasing the life of the pneumatic pliers blade and reducing the replacement rate of the blade. Moreover, each time the pneumatic shear moves to its maximum displacement, the guide rod moves into the vertical slot. At this time, the vertical plate loses the support of the guide rod and moves down under the action of the compression spring, so that the height of the protrusion on the vertical plate is lower than the height of the drive pawl. The protrusion and the drive pawl no longer collide. At the same time, the switch magnet switches from the closed state to the open state, and the magnetic end of the switch magnet exhibits magnetic force. At this time, there is an attraction force between the switch magnet and the adsorption block. The pneumatic shear automatically moves in the opposite direction and resets under the attraction force of the adsorption block. Furthermore, when the pneumatic shear head closes, the pressure rod and the rotating plate no longer collide. The rotating plate, the push plate, and the spring plate are no longer restricted by the pressure rod. The spring plate is released quickly, and the push plate at the bottom of the spring plate moves rapidly towards the PCB pins. Under the rapid movement of the push plate, the push plate can knock away any PCB pins that have not been completely cut off, thereby ensuring that the PCB pins are completely removed and increasing the reliability of the device.

[0017] Other features and advantages of this solution will be described in detail in the following detailed implementation section. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the arc-shaped rod of the present invention.

[0020] Figure 3 Appendix to this invention Figure 2 A magnified structural diagram of point A in the middle.

[0021] Figure 4 This is a schematic diagram showing the positional change of the arc-shaped rod before and after the pin is cut in this invention.

[0022] Figure 5 This is a schematic diagram of the installation structure of the vertical plate and the push plate of the present invention.

[0023] Figure 6 This is a schematic diagram of the mounting structure of the switch magnet of the present invention.

[0024] Figure 7 This is a schematic diagram of the guide groove of the present invention.

[0025] Figure 8 Appendix to this invention Figure 7 A magnified structural diagram at point B in the middle.

[0026] Figure 9 This is a schematic diagram of the structure of the first and second wedge blocks of the present invention.

[0027] Figure 10 This is a schematic diagram of the push plate of the present invention.

[0028] Explanation of reference numerals in the attached drawings: 101, robotic arm; 102, mounting base; 103, pneumatic shears; 104, positioning rod; 201, vertical plate; 202, protrusion; 203, linear bearing; 204, vertical rod; 205, compression spring; 206, guide groove; 2061, outward slide groove; 2062, return slide groove; 2063, vertical groove; 2064, inclined groove; 207, guide rod; 208. One-way plate; 209. Torsion spring No. 2; 301. Arc rod; 302. Drive pawl; 303. Limit block; 304. Torsion spring No. 1; 305. Pressure rod; 401. Switch magnet; 402. Push rod; 403. Wedge block No. 1; 404. Wedge block No. 2; 405. Adsorption block; 501. Spring plate; 502. Push plate; 503. Rotating plate; 504. Limit plate. Detailed Implementation

[0029] To make the aforementioned objectives, features, and advantages of this solution more apparent and understandable, the specific embodiments of this solution are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this solution. However, this solution can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this solution. Therefore, this solution is not limited to the specific embodiments disclosed below.

[0030] In the description of this solution, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this solution and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this solution. The terms "first" and "second" are used to distinguish one element from another and do not have sequential or importance. Furthermore, in the following description, when referring to the accompanying drawings, the same reference numerals in different drawings indicate the same or similar elements, which will not be repeated here.

[0031] In this solution, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this solution based on the specific circumstances.

[0032] According to some embodiments of this solution, a device for cutting off leads of PCB circuit boards after component soldering is provided, referenced. Figures 1 to 10 As shown, the PCB circuit board pin removal device after component soldering includes a robotic arm 101. The moving end of the robotic arm 101 is provided with a mounting base 102. A pneumatic cutter 103 is mounted on the mounting base 102. A pair of positioning rods 104 are slidably inserted on the mounting base 102. The pneumatic cutter 103 is fixedly connected to the positioning rods 104. A vertical plate 201 is mounted on the mounting base 102. A protrusion 202 is provided on the side of the vertical plate 201 near the pneumatic cutter 103. An arc-shaped rod 301 is mounted on the blade of the pneumatic cutter 103. A drive pawl 302 is hinged to the other end of the arc-shaped rod 301. The drive pawl 302 intermittently abuts against the protrusion 202. A first torsion spring 304 is provided at the end of the arc-shaped rod 301. One end of the first torsion spring 304 is connected to the arc-shaped rod 301, and the other end of the first torsion spring 304 is connected to the drive pawl 302. A limit block 303 is fixedly provided on the arc-shaped rod 301.

[0033] It should be noted that the arc-shaped rod 301 is arc-shaped, and the center of the arc-shaped rod 301 coincides with the rotation axis of the blade of the pneumatic cutter 103. When the pneumatic cutter 103 cuts PCB pins, the blade of the pneumatic cutter 103 changes from an open state to a closed state. During this process, the blade of the pneumatic cutter 103 drives the arc-shaped rod 301 to move. During the movement of the arc-shaped rod 301, the drive pawl 302 hinged at the end of the arc-shaped rod 301 comes into contact with the bump 202. When the drive pawl 302 comes into contact with the bump 202, the drive pawl 302 deflects against the first torsion spring 304. After the pneumatic pliers 103 cuts the PCB pins, the blade of the pneumatic pliers 103 changes from a closed state to an open state. During this process, the blade of the pneumatic pliers 103 drives the arc rod 301 to move in the opposite direction. The drive pawl 302, which is hinged at the end of the arc rod 301, comes into contact with the bump 202 again. When the drive pawl 302 contacts the bump 202, the limit block 303 restricts the drive pawl 302 from deflecting in the opposite direction. Therefore, the bump 202 generates a reaction force on the drive pawl 302, the arc rod 301, and the pneumatic pliers 103, causing the pneumatic pliers 103 to move.

[0034] In this way, after the pneumatic cutter 103 cuts the PCB pins, it automatically moves, causing the contact point between the PCB pins and the cutter head of the pneumatic cutter 103 to shift the next time it cuts the PCB pins. This prevents the PCB pins from causing frequent wear on the fixed position of the cutter head of the pneumatic cutter 103, and allows the cutting point of the cutter head of the pneumatic cutter 103 to switch automatically, so that different parts of the cutter head of the pneumatic cutter 103 participate in the cutting, thereby increasing the life of the cutter head of the pneumatic cutter 103 and reducing the replacement rate of the cutter head.

[0035] Therefore, in specific implementation, multiple protrusions 202 can be set, and the multiple protrusions 202 are evenly arranged on the vertical plate 201.

[0036] Please refer to Figure 5 , Figure 6 Vertical rods 204 are installed at both ends of the vertical plate 201. A linear bearing 203 is installed on the mounting base 102. The vertical rods 204 are slidably installed in the linear bearings 203. A compression spring 205 is sleeved on the vertical rods 204. The other end of the compression spring 205 is connected to the linear bearing 203. Under normal conditions, the protrusion 202 on the vertical plate 201 is flush with the drive pawl 302. If the vertical plate 201 moves down under the action of the compression spring 205, the height of the protrusion 202 on the vertical plate 201 will be lower than the height of the drive pawl 302. Therefore, the protrusion 202 and the drive pawl 302 will not collide.

[0037] Specifically, to achieve the height variation of the vertical panel 201, please refer to... Figure 6 , Figure 7A guide groove 206 is provided on the side wall of the vertical plate 201, and a guide rod 207 is provided on the pneumatic shear 103. The end of the guide rod 207 is slidably installed in the guide groove 206.

[0038] Specifically, the guide groove 206 includes a forward slide 2061, a vertical groove 2063, a return slide 2062, and an inclined groove 2064, which are connected in sequence.

[0039] It should be noted that when the guide rod 207 is in the outgoing slide groove 2061, the guide rod 207 supports the inner wall of the outgoing slide groove 2061 upwards, preventing the vertical plate 201 from moving downwards under the action of the compression spring 205. As the pneumatic shear 103 cuts multiple times, the pneumatic shear 103 drives the guide rod 207 to move towards the vertical groove 2063. When the pneumatic shear 103 moves to its maximum displacement, the guide rod 207 just moves into the vertical groove 2063. At this time, the vertical plate 201 loses the support of the guide rod 207, and the vertical plate 201 moves downwards under the action of the compression spring 205, so that the height of the protrusion 202 on the vertical plate 201 is lower than the height of the drive pawl 302. The protrusion 202 and the drive pawl 302 no longer collide, and at the same time, the guide rod 207 enters the return slide groove 2062.

[0040] At this time, if force is applied to the pneumatic shear 103, causing it to move in the opposite direction and reset, the guide rod 207 on the pneumatic shear 103 moves along the return slide 2062 to the inclined groove 2064. When the guide rod 207 moves to the inclined groove 2064, it generates an upward thrust on the inner wall of the inclined groove 2064. During this process, the horizontal height of the guide rod 207 remains unchanged, so the vertical plate 201 resets under the upward push of the guide rod 207.

[0041] Additionally, please refer to Figure 7 , Figure 8 The bottom end of the inclined groove 2064 is hinged to a one-way plate 208, and a second torsion spring 209 is provided at the bottom end of the inclined groove 2064. One end of the second torsion spring 209 is connected to the one-way plate 208, and the other end of the second torsion spring 209 is connected to the vertical plate 201. With the cooperation of the second torsion spring 209, the one-way plate 208 can only deflect in the direction of the outgoing slide 2061, so that the guide rod 207 can only enter the outgoing slide 2061 from the inclined groove 2064 in one direction.

[0042] Additionally, please refer to Figure 9 A switch magnet 401 is installed on the pneumatic shear 103, and an adsorption block 405 is fixedly installed on the mounting base 102. The adsorption block 405 is made of cast iron and is set to correspond to the magnetic adsorption end of the switch magnet 401.

[0043] Furthermore, the mounting base 102 is equipped with a first wedge block 403 and a second wedge block 404. The switch magnet 401 is equipped with a push rod 402. The push rod 402 intermittently contacts the first wedge block 403 and the second wedge block 404. Under normal conditions (when the pneumatic cutter 103 is cutting PCB pins), the switch magnet 401 is in the closed state, and the magnetic end of the switch magnet 401 does not generate magnetic force. As the pneumatic cutter 103 gradually moves, when the pneumatic cutter 103 reaches its maximum displacement, the push rod 402 at the switch magnet 401 contacts the first wedge block 403, causing the push rod 402 to drive the switch magnet 401 to rotate. The switch magnet 401 switches from the closed state to the open state, and the magnetic end of the switch magnet 401 exhibits magnetic force. At this time, there is an attraction force between the switch magnet 401 and the adsorption block 405. The pneumatic cutter 103 moves in the opposite direction and resets under the attraction force of the adsorption block 405. When the pneumatic shears 103 are reset, the push rod 402 at the switch magnet 401 contacts the second wedge block 404, causing the push rod 402 to drive the switch magnet 401 to rotate in the opposite direction, and the switch magnet 401 switches from the open state to the closed state.

[0044] Through the above technical solution, when the PCB circuit board pin cutting device provided by this solution is used after component soldering, when the pneumatic cutter 103 cuts the PCB pin, the blade of the pneumatic cutter 103 changes from an open state to a closed state. During this process, the blade of the pneumatic cutter 103 drives the arc rod 301 to move. During the movement of the arc rod 301, the drive pawl 302 hinged at the end of the arc rod 301 comes into contact with the bump 202. When the drive pawl 302 comes into contact with the bump 202, the drive pawl 302 overcomes the deflection of the first torsion spring 304. The bump 202 does not affect the position of the pneumatic cutter 103. After the pneumatic pliers 103 cuts the PCB pins, the blade of the pneumatic pliers 103 drives the arc-shaped rod 301 to move in the opposite direction. The drive pawl 302, hinged at the end of the arc-shaped rod 301, makes contact with the bump 202 again. When the drive pawl 302 contacts the bump 202, the limit block 303 restricts the drive pawl 302 from deflecting in the opposite direction. Therefore, the bump 202 generates a reaction force on the drive pawl 302, the arc-shaped rod 301, and the pneumatic pliers 103, causing the pneumatic pliers 103 to move. This ensures that when the pneumatic pliers 103 cuts the PCB pins again, the PCB pins and the blade of the pneumatic pliers 103 will be in contact. The contact point of the head is offset to prevent frequent wear of the fixed position of the pneumatic shear head 103 caused by the PCB pins. This allows the cutting point of the pneumatic shear head 103 to switch automatically, so that different parts of the pneumatic shear head 103 participate in the cutting. This increases the life of the pneumatic shear head 103 and reduces the replacement rate of the cutting head. This solves the problem mentioned in the background technology that in the actual cutting process, the PCB pins are frequently cut locally by the cutting blade, causing significant local wear of the cutting blade and increasing the replacement frequency of the cutting blade, while other parts of the cutting blade are still relatively sharp, resulting in insufficient utilization of the cutting blade edge. Moreover, each time the pneumatic shear 103 moves to its maximum displacement, the guide rod 207 moves into the vertical slot 2063. At this time, the vertical plate 201 loses the support of the guide rod 207, and the vertical plate 201 moves down under the action of the compression spring 205, so that the height of the protrusion 202 on the vertical plate 201 is lower than the height of the drive pawl 302. The protrusion 202 and the drive pawl 302 no longer collide. At the same time, the switch magnet 401 switches from the closed state to the open state, and the magnetic end of the switch magnet 401 exhibits magnetic force. At this time, there is an attraction force between the switch magnet 401 and the adsorption block 405, and the pneumatic shear 103 moves in the opposite direction and resets under the attraction force of the adsorption block 405.

[0045] It should be noted that the pneumatic shears 103 mainly include components such as a blade, a cylinder, a piston, and a guide rod. The blade is used to cut materials, the cylinder provides power, the piston pushes the guide rod, and the guide rod drives the blade to move. When compressed air enters the cylinder, it pushes the piston to move, the piston drives the guide rod to move, and the guide rod drives the jaws to move, thereby clamping and cutting the material. The specific structure and principle of the pneumatic shears 103 are well known to those skilled in the art and will not be described in detail here.

[0046] In some implementations of this solution, reference is made to Figure 5 As shown, a spring plate 501 is mounted on the mounting base 102, and a push plate 502 is provided at the bottom of the spring plate 501. After the pneumatic cutter 103 cuts the PCB pins, the push plate 502 impacts the pins.

[0047] Specifically, a rotating plate 503 is hinged to the bottom of the push plate 502, and a limit plate 504 is provided on the push plate 502. A pressure rod 305 is installed on the arc rod 301. The pressure rod 305 abuts against the rotating plate 503. When the blade of the pneumatic shear 103 is opened, the spring plate 501 changes from the normal state to the bent state.

[0048] It should be noted that before the blade of the pneumatic pliers 103 closes, the pressure rod 305 is in contact with the rotating plate 503, and the spring plate 501 is in a bent state. During the closing process of the blade of the pneumatic pliers 103, the pressure rod 305 and the rotating plate 503 are always in contact, and the movement of the pressure rod 305 relative to the rotating plate 503 is a translational movement. When the blade of the pneumatic pliers 103 closes, the pressure rod 305 and the rotating plate 503 no longer contact each other. The rotating plate 503, the push plate 502 and the spring plate 501 are no longer restricted by the pressure rod 305, the spring plate 501 is quickly released, and the push plate 502 at the bottom of the spring plate 501 moves quickly towards the PCB pin.

[0049] As the device operates for a long time, the wear of the pneumatic cutter head 103 will gradually increase, which may cause the pneumatic cutter head 103 to be unable to completely cut the PCB pins. Therefore, with the rapid movement of the push plate 502, the push plate 502 can knock away the PCB pins that are not completely cut, thereby ensuring that the PCB pins are completely removed and increasing the reliability of the device.

[0050] In addition, after the PCB pins are cut off, the blade of the pneumatic shears 103 opens, and the arc rod 301 and the pressure rod 305 move in opposite directions. When the arc rod 301 and the pressure rod 305 are reset, the pressure rod 305 squeezes the rotating plate 503 again, and the spring plate 501 changes from the normal state to the bent state.

[0051] The preferred embodiments of this solution have been described in detail above with reference to the accompanying drawings. However, this solution is not limited to the specific details in the above embodiments. Within the scope of the technical concept of this solution, various simple modifications can be made to the technical solution, and these simple modifications all fall within the protection scope of this solution.

[0052] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this solution will not describe the various possible combinations separately.

[0053] Furthermore, various implementations of this solution can be combined in any way, as long as they do not violate the spirit of this solution, they should also be regarded as the content disclosed in this solution.

Claims

1. A device for cutting leads of a PCB circuit board after component soldering, comprising a robotic arm (101), wherein a mounting base (102) is provided at the moving end of the robotic arm (101), and a pneumatic shear (103) is mounted on the mounting base (102), characterized in that: A pair of positioning rods (104) are slidably inserted into the mounting base (102), and the pneumatic shears (103) are fixedly connected to the positioning rods (104); A vertical plate (201) is mounted on the mounting base (102). A protrusion (202) is provided on the side of the vertical plate (201) near the pneumatic shears (103). An arc-shaped rod (301) is mounted on the blade of the pneumatic shears (103). A drive pawl (302) is hinged to the other end of the arc-shaped rod (301). The drive pawl (302) intermittently abuts against the protrusion (202). A first torsion spring (304) is provided at the end of the arc-shaped rod (301). One end of the first torsion spring (304) is connected to the arc-shaped rod (301), and the other end of the first torsion spring (304) is connected to the drive pawl (302). A limit block (303) is fixedly provided on the arc-shaped rod (301).

2. The device for cutting off leads of a PCB circuit board after component soldering according to claim 1, characterized in that: The protrusions (202) are provided in multiple ways, and the multiple protrusions (202) are evenly arranged on the vertical plate (201).

3. The device for cutting off leads of a PCB circuit board after component soldering according to claim 1, characterized in that: Vertical rods (204) are installed at both ends of the vertical plate (201). A linear bearing (203) is installed on the mounting base (102). The vertical rod (204) is slidably installed in the linear bearing (203). A compression spring (205) is sleeved on the vertical rod (204). The other end of the compression spring (205) is connected to the linear bearing (203).

4. The device for cutting off leads of a PCB circuit board after component soldering according to claim 1, characterized in that: The vertical plate (201) has a guide groove (206) on its side wall, and the pneumatic shears (103) is provided with a guide rod (207), the end of which is slidably installed in the guide groove (206).

5. A device for cutting off leads of a PCB circuit board after component soldering, as described in claim 4, characterized in that: The guide groove (206) includes a going chute (2061), a vertical groove (2063), a return chute (2062), and an inclined groove (2064), which are connected in sequence.

6. The device for cutting off leads of a PCB circuit board after component soldering according to claim 5, characterized in that: The bottom end of the inclined groove (2064) is hinged to a one-way plate (208), and a second torsion spring (209) is provided at the bottom end of the inclined groove (2064). One end of the second torsion spring (209) is connected to the one-way plate (208), and the other end of the second torsion spring (209) is connected to the vertical plate (201). When the guide rod (207) moves to the bottom end of the inclined groove (2064), the one-way plate (208) deflects towards the outgoing slide groove (2061).

7. The device for cutting off leads of a PCB circuit board after component soldering according to claim 1, characterized in that: A switch magnet (401) is installed on the pneumatic shears (103), and an adsorption block (405) is fixedly installed on the mounting base (102). The adsorption block (405) is made of cast iron and is arranged corresponding to the magnetic adsorption end of the switch magnet (401).

8. The device for cutting off leads of a PCB circuit board after component soldering according to claim 7, characterized in that: The mounting base (102) is provided with a first wedge block (403) and a second wedge block (404). The switch of the switch magnet (401) is provided with a push rod (402). The push rod (402) intermittently contacts the first wedge block (403) and the second wedge block (404).

9. A device for cutting off leads of a PCB circuit board after component soldering, as described in claim 1, characterized in that: A spring plate (501) is installed on the mounting base (102), and a push plate (502) is provided at the bottom end of the spring plate (501). After the pneumatic shears (103) cuts the PCB pins, the push plate (502) impacts the pins.

10. A device for cutting off leads of a PCB circuit board after component soldering, as described in claim 9, characterized in that: The bottom of the push plate (502) is hinged to a rotating plate (503). A limit plate (504) is provided on the push plate (502). A pressure rod (305) is installed on the arc rod (301). The pressure rod (305) abuts against the rotating plate (503). When the blade of the pneumatic shears (103) is opened, the spring plate (501) changes from the normal state to the bent state.

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