A multi-resistance pin soldering device for an integrated circuit

Abstract

The present invention discloses a multi-resistance pin welding device for integrated circuits, which relates to the field of resistance welding. It includes a circuit board tooling mechanism, and a welding assembly and a chamfering assembly are respectively arranged above and below the circuit board tooling mechanism. The circuit board tooling mechanism includes a rotating seat, a tooling plate, a lower pressing plate and a tooling frame. The rotating seat is rotatably installed on the tooling frame, the rotation axis of the rotating seat is horizontally arranged, one end of the rotating seat away from the tooling frame is connected with the tooling plate, a tooling window is penetrated through the tooling plate, an annular supporting boss is fixed on the inner wall of the tooling window, the lower pressing plate is installed on the rotating seat, the welding assembly includes a lifting welding plate and a welding gun, the welding gun is installed on the top of the lifting welding plate, and a welding through hole for the nozzle of the welding gun to pass through is opened on the lifting welding plate, realizing automatic welding operation within a small space range, not affecting adjacent resistors, and improving the welding efficiency and welding effect.

Description

Technical Field

[0001] The present invention relates to the technical field of resistance welding, and particularly to a multi-resistance pin welding device for integrated circuits. Background Art

[0002] In the production of integrated circuits, it is necessary to weld various components on a circuit board to form an integrated circuit. In an integrated circuit, multiple resistors often need to be welded. Since the feeding and welding of the resistors are in two different workstations, multiple resistors first complete the feeding operation at the feeding workstation, and then are transported to the welding workstation for welding multiple resistors. When the layout of the integrated circuit is relatively dense, the arrangement distance between multiple resistors is relatively close. In the traditional welding process, a circle of solder needs to be welded around the pins of the resistor, and then the redundant pins of the resistor are trimmed. As a result, the moving path of the welding gun is relatively large, which easily affects the pins of adjacent resistors, causing them to be bent or broken, thus affecting the welding effect of the resistors. Therefore, it is difficult to achieve automation in the layout of dense resistors, and manual assistance is required for welding, and the welding efficiency needs to be improved. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a multi-resistance pin welding device for integrated circuits to solve the deficiencies of the prior art.

[0004] The purpose of the present invention is achieved through the following technical solutions: A multi-resistance pin welding device for integrated circuits includes a circuit board tooling mechanism. A welding component and a chamfering component are respectively arranged above and below the circuit board tooling mechanism. The circuit board tooling mechanism includes a rotating seat, a tooling plate, a lower pressing plate, and a tooling frame. The rotating seat is rotatably installed on the tooling frame. The rotation axis of the rotating seat is horizontally arranged. One end of the rotating seat away from the tooling frame is connected to the tooling plate. A tooling window is penetrated through the tooling plate. An annular supporting boss is fixed on the inner wall of the tooling window. The lower pressing plate is installed on the rotating seat;

[0005] The welding component includes a lifting welding plate and a welding gun. The welding gun is installed on the top of the lifting welding plate. A welding through hole for the nozzle of the welding gun to pass through is opened on the lifting welding plate;

[0006] The chamfering assembly includes a lifting chamfering plate and a cutting-off assembly. The lifting chamfering plate, the lifting welding plate, and the lower pressing plate all have degrees of freedom to move in the vertical direction. The lifting chamfering plate can move into the tooling window. The lifting chamfering plate is provided with avoidance notches penetrating through at the welding positions corresponding to the resistors. A cutting-off assembly is provided at each avoidance notch. The cutting-off assembly includes a tool holder and a cutting tool. The cutting tool and the tool holder are arranged on both sides of the avoidance notch. The tool holder is fixed to the top of the lifting chamfering plate. The cutting tool is slidably mounted on the top surface of the lifting chamfering plate, and the cutting tool moves closer to or away from the tool holder.

[0007] Further, a main shaft is fixed to one end of the rotating seat away from the tooling plate. The main shaft is rotatably connected to the tooling frame. A flipping motor is installed on the tooling frame. The output shaft of the flipping motor is drivingly connected to the main shaft. An installation notch is formed in the end face of the rotating seat away from the main shaft. One end of the tooling plate is fitted into the installation notch. A bolt hole is formed in the top of the rotating seat, and a threaded hole is formed in the top of the tooling plate. The tail of the screw passes through the bolt hole and is threadedly fitted in the threaded hole.

[0008] Further, two bearing seats are fixedly arranged at intervals along the length direction of the top of the rotating seat. A rotating main shaft is arranged between the two bearing seats. The rotating main shaft is rotatably connected to the bearing seats. The axis of the rotating main shaft is perpendicular to the axis of the main shaft in the horizontal plane. A rotating plate is fixedly sleeved on the rotating main shaft. A motor is arranged on one of the bearing seats. The output shaft of the motor is drivingly connected to the rotating main shaft. The lower pressing plate is installed on the end face of the rotating plate close to the tooling plate.

[0009] Further, a plurality of installation grooves are formed in the end face of the rotating plate close to the lower pressing plate. A first electromagnet is arranged in the installation groove. A connecting rod is slidably arranged in the installation groove. The connecting rod is connected to the lower pressing plate. A first permanent magnet is connected to one end of the connecting rod close to the first electromagnet. A first spring is arranged between the first permanent magnet and the first electromagnet. The two ends of the first spring are respectively connected to the rotating plate and the connecting rod. The first electromagnet is energized to generate a magnetic pole opposite to that of the first permanent magnet. When the lower pressing plate contacts the resistor on the circuit board, the first spring is in a compressed state.

[0010] Furthermore, rectangular grooves are formed on the two symmetrical inner walls of the tooling window of the tooling plate. Second electromagnets are installed in the rectangular grooves. A limiting block is slidably arranged in the rectangular groove. One end of the limiting block close to the second electromagnet is connected with a second permanent magnet. The second electromagnet generates a magnetic pole with a magnetic property different from that of the second permanent magnet when electrified. A second spring is arranged between the second electromagnet and the second permanent magnet. Two ends of the second spring are respectively connected with the tooling plate and the limiting block. When the second spring is in a normal state, one end of the limiting block extends out of the rectangular groove.

[0011] Furthermore, the welding assembly further includes a welding frame and a first cylinder. The first cylinder is vertically installed on the welding frame. The telescopic shaft of the first cylinder is connected with the top of the lifting welding plate. The welding frame is installed on a multi-degree-of-freedom platform. The chamfering assembly further includes a base and a second cylinder. The second cylinder is vertically installed on the base. The telescopic shaft of the second cylinder is connected with the lifting chamfering plate.

[0012] Furthermore, the cutting assembly further includes a telescopic shaft, a chamfering spring, a first fixed pulley and a second fixed pulley. The telescopic shaft is horizontally arranged. Two ends of the telescopic shaft are respectively connected with the cutting knife and the lifting chamfering plate. The chamfering spring is sleeved on the telescopic shaft. When the cutting knife contacts the knife seat, the chamfering spring is in a compressed state. A wire winding shaft is rotatably installed at the bottom of the lifting chamfering plate. One end of the cutting knife away from the knife seat is connected with a wire. The wire is wound on the wire winding shaft. A first fixed pulley is rotatably arranged on the lifting chamfering plate. The axis of the first fixed pulley is vertically arranged. The second fixed pulley is rotatably installed on the side wall of the lifting chamfering plate. The wire sequentially bypasses the first fixed pulley and the second fixed pulley. A chamfering motor is installed at the bottom of the lifting chamfering plate. The output shaft of the chamfering motor is connected with an intermittent gear. One end of the wire winding shaft is connected with a gear. The gear meshes with the intermittent gear.

[0013] Further, it further includes a stacking platform and a bending mechanism. A plurality of stacking grooves are formed through the top of the stacking platform along its length direction. Pin grooves are formed at both ends of the stacking grooves on the top surface of the stacking platform. The pin grooves communicate with the stacking grooves. Clamping notch openings are formed on both sides of the stacking grooves of the stacking platform. The clamping notch openings communicate with the stacking grooves. A lifting plate is arranged below the stacking platform. The lifting plate has degrees of freedom of moving along the length direction and the height direction of the stacking platform. The lifting plate is used to penetrate into the stacking grooves to lift the resistors. The bending mechanism includes a male bending die and a female bending die. The male bending die is fixedly arranged. A limiting notch opening is formed at the top of the male bending die. The female bending die is arranged directly above the male bending die. Bending plates are arranged at both ends of the female bending die. The bending plates and the female bending die both have degrees of freedom of moving in the vertical direction.

[0014] Further, a linear driving module is arranged below the stacking platform. A third cylinder is vertically installed on the sliding seat of the linear driving module. The telescopic shaft of the third cylinder is connected to the lifting plate.

[0015] Further, the bending mechanism further includes a bending machine frame, a fourth cylinder, a first rod, a second rod and a horizontal plate. The fourth cylinder is vertically installed on the bending machine frame. The telescopic shaft of the fourth cylinder is connected to the first rod. The second rod is slidably inserted through the bottom of the first rod. One end of the second rod away from the first rod is connected to the female bending die. The horizontal plate is fixedly sleeved on the first rod. A bending spring is sleeved on the first rod. Two ends of the bending spring are respectively connected to the female bending die and the horizontal plate. The two bending plates are respectively fixed at both ends of the bottom of the horizontal plate. Under normal conditions, the bottom surface height of the bending plate is equal to or higher than the bottom surface height of the female bending die.

[0016] The beneficial effects of the present invention are as follows:

[0017] First, insert the pins of a plurality of resistors into the soldering holes of the circuit board. The circuit board is fed into the tooling window and supported by the annular support boss. The lower pressing plate contacts the resistor for limiting. Then, the lifting and chamfering plate moves close to the pins of the resistor, so that the pins of the resistor are located between the tool holder and the cutting tool. The pins of the resistor are trimmed by the cutting tool to make the remaining length of the pins meet the welding requirements. Then, the rotating seat drives the circuit board to rotate 180°. The pins of the resistor face upward and are in the welding station. At this time, the welding gun directly contacts the pins of the resistor, so that the flowing solder diffuses around along with the pins. Thus, the soldering operation is completed by the way of spot welding, which greatly reduces the moving range of the welding gun during welding, realizes the automatic welding operation in a small space range, will not affect the adjacent resistors, and improves the welding efficiency and welding effect. Brief Description of the Drawings

[0018] Figure 1 Structural schematic of a multi-resistance pin soldering device for an integrated circuit of the present invention Figure 1 ;

[0019] Figure 2 is Figure 1 The enlarged view at position A in

[0020] Figure 3 Structural schematic of a multi-resistance pin soldering device for an integrated circuit of the present invention Figure 2 ;

[0021] Figure 4 Internal structural schematic diagram of the rotating plate in a multi-resistance pin soldering device for an integrated circuit of the present invention

[0022] Figure 5 Internal structural schematic diagram of the rotating seat in a multi-resistance pin soldering device for an integrated circuit of the present invention

[0023] Figure 6 is Figure 5 The enlarged view at position B in

[0024] Figure 7 Arrangement schematic diagram of the cutting component in a multi-resistance pin soldering device for an integrated circuit of the present invention

[0025] Figure 8 Structural schematic of a multi-resistance pin soldering device for an integrated circuit of the present invention Figure 3 ;

[0026] Figure 9 is Figure 8 The enlarged view at position C in

[0027] Figure 10 Structural schematic of a multi-resistance pin soldering device for an integrated circuit of the present invention Figure 4 ;

[0028] In the figure, 1 - rotating base, 2 - tooling plate, 3 - lower pressing plate, 4 - tooling rack, 5 - tooling window, 6 - annular supporting boss, 7 - lifting welding plate, 8 - welding gun, 9 - welding through hole, 10 - lifting chamfering plate, 11 - avoidance notch, 12 - tool holder, 13 - cutting tool, 14 - main shaft, 15 - flipping motor, 16 - mounting notch, 17 - threaded hole, 18 - screw rod, 19 - bearing seat, 20 - rotating main shaft, 21 - rotating plate, 22 - motor, 23 - mounting groove, 24 - first electromagnet, 25 - first permanent magnet, 26 - first spring, 27 - rectangular groove, 28 - second electromagnet, 29 - limiting block, 30 - second permanent magnet, 31 - second spring, 32 - welding rack, 33 - first cylinder, 34 - base, 35 - second cylinder, 36 - telescopic shaft, 37 - chamfering spring, 38 - winding shaft, 39 - pull wire, 40 - first fixed pulley, 41 - second fixed pulley, 42 - chamfering motor, 43 - intermittent gear, 44 - gear, 45 - stacking groove, 46 - pin groove, 47 - clamping notch, 48 - lifting plate, 49 - bending male die, 50 - bending female die, 51 - limiting notch, 52 - linear drive module, 53 - third cylinder, 54 - bending machine frame, 55 - fourth cylinder, 56 - first rod body, 57 - second rod body, 58 - horizontal plate, 59 - bending spring, 60 - bending plate, 61 - stacking platform. Detailed implementation mode

[0029] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0030] Example 1: As Figures 1 to 10As shown in the figure, a multi-resistance pin soldering device for an integrated circuit includes a circuit board tooling mechanism. A soldering component and a chamfering component are respectively arranged above and below the circuit board tooling mechanism. The circuit board tooling mechanism includes a rotating seat 1, a tooling plate 2, a lower pressing plate 3 and a tooling frame 4. The rotating seat 1 is rotatably installed on the tooling frame 4. The rotation axis of the rotating seat 1 is horizontally arranged. One end of the rotating seat 1 away from the tooling frame 4 is connected with the tooling plate 2. A tooling window 5 is penetrated through the tooling plate 2. An annular supporting boss 6 is fixed on the inner wall of the tooling window 5. The lower pressing plate 3 is installed on the rotating seat 1. The shape and size of the tooling window 5 match the shape and size of the circuit board, so that the circuit board can be positioned in the tooling window 5 when being loaded, which is convenient for planning the soldering path of the soldering component according to the solder holes of the resistors on the circuit board to realize automatic soldering. At the same time, the shape of the annular supporting boss 6 matches the shape of the circuit board, so that the soldering position of the circuit board is in an exposed state;The welding assembly includes a lifting welding plate 7 and a welding gun 8. The welding gun 8 is installed on the top of the lifting welding plate 7. A welding through hole 9 for the nozzle of the welding gun 8 to pass through is provided on the lifting welding plate 7. The chamfering assembly includes a lifting chamfering plate 10 and a cutting assembly. The lifting chamfering plate 10, the lifting welding plate 7 and the lower pressing plate 3 all have degrees of freedom to move in the vertical direction. The lifting chamfering plate 10 can move into the tooling window 5. An avoidance notch 11 is provided through the lifting chamfering plate 10 corresponding to the welding position of the resistor. A cutting assembly is provided at each avoidance notch 11. The cutting assembly includes a tool holder 12 and a cutting tool 13. The cutting tool 13 and the tool holder 12 are arranged on both sides of the avoidance notch 11. The tool holder 12 is fixed on the top of the lifting chamfering plate 10. The cutting tool 13 is slidably installed on the top surface of the lifting chamfering plate 10. The cutting tool 13 moves closer to or away from the tool holder 12. The feeding of the circuit board is carried out by a six-axis robotic arm. A negative pressure disc is installed at the end of the six-axis robotic arm. The automatic feeding of the circuit board is completed by cooperating with the six-axis robotic arm in a negative pressure manner. This is the prior art and will not be elaborated here. The circuit board is fed into the tooling window 5 and is supported by the annular support boss 6. Then, the lower pressing plate 3 moves downward close to the circuit board to make the lower pressing plate 3 contact the resistor for positioning, ensuring that the resistor will not shift during the trimming of the resistor leads, making the trimming length of the resistor leads more accurate. Then, the lifting chamfering plate 10 moves upward close to the leads of the resistor to make the leads of the resistor pass through the avoidance notch 11 and be located between the tool holder 12 and the cutting tool 13. The leads of the resistor are trimmed by the cutting tool 13 to make the remaining length of the leads meet the welding requirements. By arranging the position of the chamfering assembly according to the layout of the resistors on the circuit board, the chamfering of multiple resistors is achieved simultaneously, improving the chamfering efficiency of the resistors. Then, the rotating seat 1 drives the circuit board and the lower pressing plate 3 to rotate 180°, making the leads of the resistor face upward and be in the welding station. The lower pressing plate 3 maintains the positioning effect on the resistor, ensuring that the resistor will not shift during the welding process, and having a good welding effect. At this time, the welding nozzle of the welding gun 8 directly contacts the leads of the resistor, so that the flowing solder diffuses around along with the leads. Thus, the welding operation is completed by using the spot welding method to make the solder diffuse around the leads, greatly reducing the movement range of the welding gun during welding, realizing the automated welding operation within a small space range, and not affecting the adjacent resistors. The welding gun 8 has degrees of freedom to move not only in the Z-axis direction in the space coordinate system but also in the X and Y-axis directions, enabling the welding gun 8 to sequentially perform welding operations on multiple resistors following the planned welding path, realizing the automatic welding operation of multiple resistors and improving the welding efficiency and welding effect.;

[0031] Further, the welding assembly further includes a welding frame 32 and a first cylinder 33. The first cylinder 33 is vertically installed on the welding frame 32. The telescopic shaft of the first cylinder 33 is connected to the top of the lifting welding plate 7. The welding frame 32 is installed on a multi-degree-of-freedom platform. The chamfering assembly further includes a base 34 and a second cylinder 35. The second cylinder 35 is vertically installed on the base 34. The telescopic shaft of the second cylinder 35 is connected to the lifting chamfering plate 10. The multi-degree-of-freedom platform includes a first linear drive module, a second linear drive module, and a carrying platform. The second linear drive module is installed on the slide of the first linear drive module. The carrying platform is installed on the slide of the second linear drive module. The moving direction of the first linear drive module is perpendicular to the moving direction of the second linear drive module on the horizontal plane, so that the welding gun 8 has three degrees of freedom of movement in the X, Y, and Z axes. The multi-degree-of-freedom platform directly adopts a two-degree-of-freedom platform, which belongs to the prior art and is not shown in the figure. By the telescopic movement of the second cylinder 35, the lifting chamfering plate 10 is driven to move along the Z-axis direction, so that the lifting chamfering plate 10 can move to the specified position according to the remaining length of the resistor to complete the chamfering operation.

[0032] Embodiment 2: In order to further improve the degree of automation, on the basis of Embodiment 1, as Figure 1 , Figure 3 , Figure 8 and Figure 10As shown in the figure, it further includes a stacking platform 61 and a bending mechanism. A plurality of stacking grooves 45 are formed through the top of the stacking platform 61 along its length direction. Pin grooves 46 are formed at both ends of the top surface of the stacking platform 61 at the two ends of the stacking groove 45. The pin grooves 46 communicate with the stacking groove 45. Clamping notch 47 is formed on both sides of the stacking platform 61 at the stacking groove 45. The clamping notch 47 communicates with the stacking groove 45. A lifting plate 48 is arranged below the stacking platform 61. The lifting plate 48 has degrees of freedom of moving along the length direction and the height direction of the stacking platform 61. The lifting plate 48 is used to penetrate into the stacking groove 45 to lift the resistor. The bending mechanism includes a bending male mold 49 and a bending female mold 50. The bending male mold 49 is fixedly arranged. A limiting notch 51 is formed at the top of the bending male mold 49. The bending female mold 50 is arranged directly above the bending male mold 49. Bending plates 60 are arranged at both ends of the bending female mold 50. The bending plates 60 and the bending female mold 50 both have degrees of freedom of moving along the vertical direction. A linear driving module 52 is arranged below the stacking platform 61. A third cylinder 53 is vertically installed on the slide of the linear driving module 52. The telescopic shaft of the third cylinder 53 is connected to the lifting plate 48. The bending mechanism further includes a bending machine frame 54, a fourth cylinder 55, a first rod 56, a second rod 57 and a horizontal plate 58. The fourth cylinder 55 is vertically installed on the bending machine frame 54. The telescopic shaft of the fourth cylinder 55 is connected to the first rod 56. The second rod 57 is slidably penetrated through the bottom of the first rod 56. The end of the second rod 57 away from the first rod 56 is connected to the bending female mold 50. The horizontal plate 58 is fixedly sleeved on the first rod 56. A bending spring 59 is sleeved on the first rod 56. The two ends of the bending spring 59 are respectively connected to the bending female mold 50 and the horizontal plate 58. The two bending plates 60 are respectively fixed at both ends of the bottom of the horizontal plate 58. Under normal state, the bottom surface height of the bending plate 60 is equal to or higher than the bottom surface height of the bending female mold 50. The feeding station and the welding station of the resistor are set at the same position. To improve production efficiency, first, all the resistors are fed onto the circuit board, then all the resistors are synchronously chamfered, and finally, the welding operations are performed on multiple resistors in sequence. The specific feeding process of the resistor is as follows: A plurality of stacking grooves 45 are arranged on the stacking platform 61. The plurality of stacking grooves 45 can stack resistors of different models, so that resistors of different types and different resistance values can be fed onto the circuit board in sequence. The width dimension of the stacking groove 45 matches the tube diameter of the resistor, so that only one resistor can be placed on the same horizontal plane, and the resistors are stacked vertically in the stacking groove 45. The initial state of the resistor pins is linear and not bent. The two pins of the resistor are respectively located in the two pin grooves 46, so as to position and stack the resistors in the stacking groove 45, and accurate feeding can be realized. The feeding of the resistor is carried out by means of clamping with a robotic arm. The clamping notch 47 is for the pneumatic gripper at the end of the robotic arm to extend into and clamp the resistor. A finger cylinder can be used for the pneumatic gripper. Since the length of the gripper of the pneumatic gripper is limited, the layout depth of the stacking groove 45 is much greater than the length of the gripper.To ensure the smooth grasping of the resistors in the stacking slot 45, the lifting plate 48 is driven by the linear drive module 52 to switch positions between different stacking slots 45. Then, the third cylinder 53 drives the lifting plate 48 to move upward, enabling the lifting plate 48 to extend into the stacking slot 45 to lift the resistors, causing the topmost resistor to move upward into the clamping range of the pneumatic gripper. This ensures that the clamping position of the resistor remains unchanged, allowing the pneumatic gripper to grasp the resistor each time it extends to the corresponding depth position in the stacking slot 45. The clamped resistor is placed in the limiting notch 51 of the bending male mold 49. Then, the fourth cylinder 55 drives the bending female mold 50 to move closer to the bending male mold 49. After the bending female mold 50 and the bending male mold 49 are closed, the bending female mold 50 is restricted from moving by the bending male mold, while the fourth cylinder 55 continues to drive the first rod 56 to move downward. Through the movement freedom between the first rod 56 and the second rod 57, the first rod 56 can compress the bending spring 59 to drive the horizontal plate 58 to move downward further, causing the horizontal plate 58 to drive the two bending plates 60 to press down on the two leads of the resistor, thereby bending the leads of the resistor by 90°. Finally, the bent resistor is loaded onto the circuit board by the robotic arm, and the leads of the resistor pass through the welding holes to complete the resistor loading operation, greatly improving the degree of automation.

[0033] Embodiment 3: On the basis of Embodiment 2, as Figures 1 to 5 shown, a main shaft 14 is fixed at one end of the rotating seat 1 away from the tooling plate 2. The main shaft 14 is rotationally connected to the tooling frame 4. A reversing motor 15 is installed on the tooling frame 4, and the output shaft of the reversing motor 15 is drivingly connected to the main shaft 14. An installation notch 16 is formed on the end face of the rotating seat 1 away from the main shaft 14, and one end of the tooling plate 2 is fitted in the installation notch 16. A bolt hole is formed at the top of the rotating seat 1, and a threaded hole 17 is formed at the top of the tooling plate 2. The tail of the screw 18 passes through the bolt hole and is threadedly fitted in the threaded hole 17. The reversing motor 15 drives the main shaft 14 to rotate, and the main shaft 14 drives the rotating seat 1 to rotate, thereby enabling the circuit board to be flipped by 180°, making the leads of the resistor face upward at the welding station for welding operations; the tooling plate 2 is detachably installed on the rotating seat 1 by the screw 18, and the corresponding tooling plate 2 can be installed according to the shape and size of the circuit board, enabling the circuit board to be positioned within the tooling window 5.

[0034] Embodiment 4: On the basis of Embodiment 3, as Figures 1 to 5As shown, two bearing blocks 19 are fixedly arranged at intervals along the length direction of the top of the rotating base 1. A rotating main shaft 20 is arranged between the two bearing blocks 19. The rotating main shaft 20 is rotatably connected to the bearing blocks 19. The axis of the rotating main shaft 20 is perpendicular to the axis of the main shaft 14 on the horizontal plane. A rotating plate 21 is fixedly sleeved on the rotating main shaft 20. A motor 22 is arranged on one of the bearing blocks 19. The output shaft of the motor 22 is drivingly connected to the rotating main shaft 20. The lower pressing plate 3 is installed on the end face of the rotating plate 21 close to the tooling plate 2. To prevent the lower pressing plate 3 from blocking the circuit board and affecting the feeding of the resistor, the lower pressing plate 3 is installed on the rotating plate 21. During the feeding process of the circuit board and the resistor, the motor 22 drives the rotating main shaft 20 to rotate, causing the rotating plate 21 to deflect away from the tooling plate 2, so that the rotating plate 21 drives the lower pressing plate 3 to deflect to one side of the tooling plate 2, making the tooling window 5 of the tooling plate 2 in a completely exposed state, so that the circuit board and the resistor can smoothly complete the feeding operation.

[0035] Embodiment Five: On the basis of Embodiment Four, as Figures 1 to 4 shown, a plurality of installation grooves 23 are formed in the end face of the rotating plate 21 close to the lower pressing plate 3. A first electromagnet 24 is arranged in the installation groove 23. A connecting rod is slidably arranged in the installation groove 23. The connecting rod is connected to the lower pressing plate 3. One end of the connecting rod close to the first electromagnet 24 is connected with a first permanent magnet 25. A first spring 26 is arranged between the first permanent magnet 25 and the first electromagnet 24. The two ends of the first spring 26 are respectively connected to the rotating plate 21 and the connecting rod. The first electromagnet 24 is energized to generate a magnetic pole with a different magnetic property from that of the first permanent magnet 25. When the lower pressing plate 3 contacts the resistor on the circuit board, the first spring 26 is in a compressed state. After the resistor is fed onto the circuit board, the rotating plate 21 drives the lower pressing plate 3 to rotate close to the circuit board to a horizontal state. During this process, the first electromagnet 24 is energized to attract the first permanent magnet 25, causing the connecting rod to drive the lower pressing plate 3 to deflect close to the rotating plate 21. After the lower pressing plate 3 deflects to the horizontal state, there is a certain distance between the lower pressing plate 3 and the resistor, so that the lower pressing plate 3 will not squeeze the resistor during the deflection process. Finally, the first electromagnet 24 is powered off, and the connecting rod moves downward under the action of the first spring 26, causing the lower pressing plate 3 to contact the resistor, thereby limiting the welding position of the resistor and ensuring that the position of the resistor will not change during the chamfering and welding processes.

[0036] Embodiment Six: Since the circuit board needs to be flipped 180°, to prevent the circuit board from falling off the annular supporting boss 6 after flipping, on the basis of Embodiment Five, as Figures 1 to 6As shown in the figure, rectangular grooves 27 are provided on both symmetric inner walls of the tooling plate 2 in the tooling window 5. A second electromagnet 28 is installed in the rectangular groove 27. A limiting block 29 is slidably arranged in the rectangular groove 27. One end of the limiting block 29 close to the second electromagnet 28 is connected with a second permanent magnet 30. The second electromagnet 28 is energized to generate a magnetic pole with a different magnetism from that of the second permanent magnet 30. A second spring 31 is arranged between the second electromagnet 28 and the second permanent magnet 30. Both ends of the second spring 31 are respectively connected with the tooling plate 2 and the limiting block 29. When the second spring 31 is in a normal state, one end of the limiting block 29 extends out of the rectangular groove 27. When loading the circuit board, the second electromagnet 28 is energized to attract the second permanent magnet 30, so that the limiting block 29 compresses the second spring 31 and moves into the rectangular groove 27, enabling the circuit board to be successfully loaded. After the circuit board is loaded on the annular support boss 6, the second electromagnet 28 is powered off, so that the limiting block 29 is reset under the reaction force of the second spring 31, and thus one end of the limiting block 29 extends out of the rectangular groove 27 and abuts against the top surface of the circuit board. The circuit board is limited by the limiting block 29 and the annular support boss 6 together to ensure that the position of the circuit board will not change during the chamfering and welding processes.

[0037] Embodiment Seven: On the basis of Embodiment Six, as Figures 1 to 10As shown, the cutting component further includes a telescopic shaft 36, a chamfering spring 37, a first fixed pulley 40 and a second fixed pulley 41. The telescopic shaft 36 is horizontally arranged, and both ends of the telescopic shaft 36 are respectively connected to the cutter 13 and the lifting chamfering plate 10. The chamfering spring 37 is sleeved on the telescopic shaft 36. When the cutter 13 contacts the tool holder 12, the chamfering spring 37 is in a compressed state. A winding shaft 38 is rotatably installed at the bottom of the lifting chamfering plate 10. One end of the cutter 13 away from the tool holder 12 is connected to a pull wire 39, and the pull wire 39 is wound around the winding shaft 38. A first fixed pulley 40 is rotatably arranged on the lifting chamfering plate 10, and the axis of the first fixed pulley 40 is vertically arranged. The second fixed pulley 41 is rotatably installed on the side wall of the lifting chamfering plate 10. The pull wire 39 successively bypasses the first fixed pulley 40 and the second fixed pulley 41. A chamfering motor 42 is installed at the bottom of the lifting chamfering plate 10, and the output shaft of the chamfering motor 42 is connected to an intermittent gear 43. One end of the winding shaft 38 is connected to a gear 44, and the gear 44 meshes with the intermittent gear 43. During chamfering, the chamfering motor 42 drives the winding shaft 38 to rotate through the meshing of the intermittent gear 43 and the gear 44. The winding shaft 38 winds the pull wire 39, so that the pull wire 39 drives the cutter 13 to compress the chamfering spring 37 and move away from the tool holder 12. Then the lifting chamfering plate 10 moves to a specified position, so that the pin passes through the avoidance notch 11. When the toothed area of the intermittent gear 43 is separated from the gear 44, the cutter 13 moves close to the tool holder 12 under the reaction force of the chamfering spring 37. Under the action of the chamfering spring 37, the cutter 13 acts on the tool holder 12 with a greater impact force, thereby cutting off the pin to complete the chamfering operation; it should be noted that due to the different arrangement directions and relatively close arrangement distances of the resistors, the first fixed pulley 40 and the second fixed pulley 41 are provided to change the direction of the pull wire 39, so that the pull wires 39 corresponding to multiple resistors can be wound on the same winding shaft 38. The number of the first fixed pulleys 40 is not limited and is set according to the arrangement direction of the resistors. The winding direction of the pull wire is adjusted by the first fixed pulley 40, so that the pull wire can avoid the adjacent cutting components by using the space at other positions around, realizing the simultaneous chamfering of multiple resistors and specifically improving the production efficiency.

Claims

1. A multi-resistor pin welding device for an integrated circuit, characterized in that: It comprises a circuit board fixture mechanism, wherein a welding assembly and a corner cutting assembly are respectively arranged above and below the circuit board fixture mechanism, and the circuit board fixture mechanism comprises a rotating seat (1), a fixture plate (2), a lower pressure plate (3) and a fixture frame (4), wherein the rotating seat (1) is rotatably mounted on the fixture frame (4), the rotating axis of the rotating seat (1) is arranged horizontally, the end of the rotating seat (1) away from the fixture frame (4) is connected to the fixture plate (2), a fixture window (5) is penetrated through the fixture plate (2), an inner wall of the fixture window (5) is fixed with an annular support boss (6), and the lower pressure plate (3) is mounted on the rotating seat (1); The welding assembly comprises a lifting welding plate (7) and a welding gun (8); the welding gun (8) is mounted on the top of the lifting welding plate (7); and a welding through hole (9) is provided on the lifting welding plate (7) for the nozzle of the welding gun (8) to pass through. The chamfering assembly comprises a lifting chamfering plate (10) and a cutting assembly. The lifting chamfering plate (10), the lifting welding plate (7) and the lower pressing plate (3) all have the freedom to move in the vertical direction. The lifting chamfering plate (10) can be moved into the tooling window (5). The lifting chamfering plate (10) is provided with an avoidance slot (11) through the welding position corresponding to the resistor. The cutting assembly is provided at each avoidance slot (11). The cutting assembly comprises a knife seat (12) and a cutter (13). The cutter (13) and the knife seat (12) are arranged on both sides of the avoidance slot (11). The knife seat (12) is fixed on the top of the lifting chamfering plate (10). The cutter (13) is slidably mounted on the top surface of the lifting chamfering plate (10). The cutter (13) moves close to or away from the knife seat (12). A main shaft (14) is fixed to one end of the rotating seat (1) away from the tooling plate (2), and the main shaft (14) is rotatably connected to the tooling frame (4). A flip motor (15) is installed on the tooling frame (4), and the output shaft of the flip motor (15) is drivingly connected to the main shaft (14). An installation slot (16) is provided on the end surface of the rotating seat (1) away from the main shaft (14), and one end of the tooling plate (2) is adapted to the installation slot (16). A bolt hole is provided on the top of the rotating seat (1), and a threaded hole (17) is provided on the top of the tooling plate (2). The tail of the screw rod (18) passes through the bolt hole and is threadedly adapted to be in the threaded hole (17); Two bearing seats (19) are fixed at intervals on the top of the rotating seat (1) along its length direction, and a rotating main shaft (20) is arranged between the two bearing seats (19). The rotating main shaft (20) is rotatably connected to the bearing seats (19), and the axis of the rotating main shaft (20) is perpendicular to the axis of the main shaft (14) in a horizontal plane. A rotating plate (21) is fixedly mounted on the rotating main shaft (20), and a motor (22) is arranged on one of the bearing seats (19). The output shaft of the motor (22) is connected to the rotating main shaft (20) in a transmission manner. The lower pressure plate (3) is installed on the end surface of the rotating plate (21) close to the tooling plate (2).

2. The multi-resistor pin welding device of an integrated circuit according to claim 1, characterized in that: The end surface of the rotating plate (21) close to the lower pressing plate (3) is provided with a plurality of mounting grooves (23), a first electromagnet (24) is arranged in the mounting groove (23), a connecting rod is slidably arranged in the mounting groove (23), the connecting rod is connected to the lower pressing plate (3), one end of the connecting rod close to the first electromagnet (24) is connected to a first permanent magnet (25), a first spring (26) is arranged between the first permanent magnet (25) and the first electromagnet (24), the two ends of the first spring (26) are respectively connected to the rotating plate (21) and the connecting rod, the first electromagnet (24) generates a magnetic pole with a different magnetic property from that of the first permanent magnet (25) when energized, and when the lower pressing plate (3) contacts the resistor on the circuit board, the first spring (26) is in a compressed state.

3. The multi-resistor pin welding device of an integrated circuit according to claim 2, characterized in that: The tooling plate (2) is provided with rectangular grooves (27) on two symmetrical inner walls of the tooling window (5), a second electromagnet (28) is installed in the rectangular groove (27), a limit block (29) is slidably arranged in the rectangular groove (27), one end of the limit block (29) close to the second electromagnet (28) is connected to a second permanent magnet (30), the second electromagnet (28) generates a magnetic pole with a different magnetic property from that of the second permanent magnet (30) when the second electromagnet (28) is energized, a second spring (31) is arranged between the second electromagnet (28) and the second permanent magnet (30), two ends of the second spring (31) are respectively connected to the tooling plate (2) and the limit block (29), and when the second spring (31) is in a normal state, one end of the limit block (29) extends out of the rectangular groove (27).

4. The multi-resistor pin welding device of an integrated circuit according to claim 1, characterized in that: The welding assembly further comprises a welding frame (32) and a first cylinder (33), wherein the first cylinder (33) is vertically mounted on the welding frame (32), and a telescopic shaft of the first cylinder (33) is connected to the top of the lifting welding plate (7), and the welding frame (32) is mounted on a multi-degree-of-freedom platform. The corner cutting assembly further comprises a base (34) and a second cylinder (35), wherein the second cylinder (35) is vertically mounted on the base (34), and a telescopic shaft of the second cylinder (35) is connected to the lifting corner cutting plate (10).

5. The multi-resistor pin welding device of an integrated circuit according to claim 1, characterized in that: The cutting assembly further comprises a telescopic shaft (36), a cutting angle spring (37), a first fixed pulley (40) and a second fixed pulley (41); the telescopic shaft (36) is arranged horizontally; two ends of the telescopic shaft (36) are respectively connected to the cutter (13) and the lifting cutting angle plate (10); the cutting angle spring (37) is sleeved on the telescopic shaft (36); when the cutter (13) contacts the cutter seat (12), the cutting angle spring (37) is in a compressed state; a winding shaft (38) is rotatably mounted on the bottom of the lifting cutting angle plate (10); an end of the cutter (13) away from the cutter seat (12) is connected to a pull wire (39); the pull wire (39) ) is wound on the winding shaft (38), a first fixed pulley (40) is rotatably arranged on the lifting and chamfering plate (10), the axis of the first fixed pulley (40) is arranged vertically, the second fixed pulley (41) is rotatably mounted on the side wall of the lifting and chamfering plate (10), the pulling wire (39) passes around the first fixed pulley (40) and the second fixed pulley (41) in sequence, a chamfering motor (42) is installed at the bottom of the lifting and chamfering plate (10), the output shaft of the chamfering motor (42) is connected to an intermittent gear (43), one end of the winding shaft (38) is connected to a gear (44), and the gear (44) meshes with the intermittent gear (43).

6. The multi-resistor pin welding device of an integrated circuit according to claim 1, characterized in that: It also includes a stacking platform and a bending mechanism, wherein a plurality of stacking grooves (45) are formed on the top of the stacking platform along its length direction, pin grooves (46) are formed on the top surface of the stacking platform at both ends of the stacking grooves (45), the pin grooves (46) are connected to the stacking grooves (45), the stacking platform is formed with clamping notches (47) on both sides of the stacking grooves (45), the clamping notches (47) are connected to the stacking grooves (45), and a lifting plate (48) is provided below the stacking platform, the lifting plate (48) having the ability to move automatically along the length direction of the stacking platform. The lifting plate (48) is used to penetrate into the stacking groove (45) to lift the resistor, and the bending mechanism comprises a bending male mold (49) and a bending female mold (50). The bending male mold (49) is fixedly arranged, and a limiting notch (51) is provided on the top of the bending male mold (49). The bending female mold (50) is arranged directly above the bending male mold (49). Bending plates (60) are provided at both ends of the bending female mold (50), and the bending plates (60) and the bending female mold (50) both have the freedom to move in the vertical direction.

7. The multi-resistor pin welding device of an integrated circuit according to claim 6, characterized in that: A linear drive module (52) is arranged below the stacking platform, a third cylinder (53) is vertically mounted on a slide seat of the linear drive module (52), and a telescopic shaft of the third cylinder (53) is connected to the lifting plate (48).

8. The multi-resistor pin welding device of an integrated circuit according to claim 6, characterized in that: The bending mechanism further comprises a bending frame (54), a fourth air cylinder (55), a first rod (56), a second rod (57) and a horizontal plate (58), wherein the fourth air cylinder (55) is vertically mounted on the bending frame (54), a telescopic shaft of the fourth air cylinder (55) is connected to the first rod (56), the second rod (57) is slidably disposed on the bottom of the first rod (56), and an end of the second rod (57) away from the first rod (56) is connected to the first rod (56). The bending mother mold (50) and the horizontal plate (58) are fixedly mounted on the first rod body (56). The first rod body (56) is mounted with a bending spring (59). The two ends of the bending spring (59) are respectively connected to the bending mother mold (50) and the horizontal plate (58). The two bending plates (60) are respectively fixed at the two ends of the bottom of the horizontal plate (58). Under normal conditions, the bottom surface height of the bending plates (60) is equal to or higher than the bottom surface height of the bending mother mold (50).

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