Pin cutting equipment for diode processing

Abstract

The invention relates to the technical field of diode pin cutting, in particular to diode processing pin cutting equipment. Comprising a rack; the discharging plates are symmetrically connected to the rack, and an inclined plane is arranged on one side of each discharging plate; the first electric push rods are symmetrically mounted on the rack; the lifting rod is connected to a telescopic rod of the first electric push rod; the first screw rod motor is mounted on the lifting rod; the first guide rod is connected into the lifting rod; and the limiting plate is slidably connected to the first guide rod, and square holes are evenly formed in the side face of the limiting plate at intervals. The staggered design of the limiting plate and the limiting insertion rod is matched with the square hole, bent diode pins can be automatically straightened under the driving of the lifting rod, it is ensured that the axes of the pins are aligned, differential cutting can be conducted on the two pins at the same time in combination with the wavy design of the cutter and the cooperative action of the transverse plate, and the production efficiency is improved. The problems of uneven notches, overlong residues and the like caused by pin deformation of traditional equipment can be effectively solved, and the cutting precision and consistency are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of diode lead cutting, and particularly to a diode processing lead cutting device. Background Art

[0002] In the manufacturing process of electronic components, as a basic and crucial component, the processing precision and efficiency of diodes directly affect the quality and stability of subsequent circuit assembly. Among them, the lead cutting process is an essential step after diode packaging, and its purpose is to cut the excess length of the leads to the standard size to meet the requirements of automated assembly and soldering processes.

[0003] Currently, in the industry, the cutting of diode leads still mostly adopts the manual method of processing one by one, that is, manually cutting off the excess part of the leads. This method not only has a large labor intensity but also has low work efficiency and is difficult to meet the needs of mass production. Although some large manufacturers have adopted automatic lead cutting equipment for processing, the existing equipment generally uses a fixture to fix the diode body and drives the cutting tool to move horizontally through a pneumatic or electric system for cutting at a predetermined position. However, in actual applications, it is found that the diode leads are prone to bending or offset during transportation, feeding, and clamping, resulting in the instability of their axis positions and inability to accurately align with the preset cutting path of the cutting tool. Moreover, the existing lead cutting equipment usually lacks the function of automatically straightening the leads. Therefore, when facing lead deformation, it cannot accurately cut, easily causing problems such as uneven cut edges, excessive residues, or even damage to the components. This will not only reduce the success rate and consistency of the lead cutting operation but also affect the overall production efficiency and product yield. Summary of the Invention

[0004] In view of this, the present invention provides a diode processing lead cutting device, which can overcome the disadvantages that the existing lead cutting equipment will cause cutting deviation due to lead deformation during diode lead cutting, resulting in problems such as uneven cut edges, excessive residues, or even damage to the device body.

[0005] The technical solution of the present invention is as follows: A diode processing lead cutting device includes: a frame; a feeding plate symmetrically connected to the frame, and one side of the feeding plate is provided with an inclined surface; a first electric push rod symmetrically installed on the frame; a lifting rod connected to the telescopic rod of the first electric push rod; a first screw motor installed on the lifting rod; a first guide rod connected inside the lifting rod; a limiting plate slidably connected to the first guide rod, with square holes evenly spaced on the side surface of the limiting plate. The limiting plate is slidably connected to the lifting rod and is threadedly connected to the screw of the first screw motor; limiting insertion rods symmetrically and spacedly connected to the side surface of the limiting plate; a cutting assembly arranged on the frame for cutting the leads of the diode; a limiting assembly arranged on the feeding plate for limiting the diodes on the feeding plate.

[0006] As a preferred technical solution of the present invention, the cutting assembly includes: a lifting mechanism disposed on the frame; mounting rods symmetrically disposed on the lifting mechanism, and the lifting mechanism is used to drive the mounting rods to lift; a second guide rod slidably connected to the mounting rods; a cross plate connected to the end of one of the second guide rods; a cutting knife connected to the end of the other second guide rod; a second electric push rod mounted on the side of the mounting rod, and the telescopic rods of the second electric push rod are respectively connected to the cross plate and the cutting knife.

[0007] As a preferred technical solution of the present invention, the lifting mechanism includes: U-shaped rods symmetrically connected to the frame; third guide rods symmetrically connected to one of the U-shaped rods, and the third guide rods are slidably connected to the mounting rods; threaded rods symmetrically rotatably connected to the other U-shaped rod, and the threaded rods are threadedly connected to the mounting rods; a driving motor mounted on the frame, and the output shaft of the driving motor is connected to the end of one of the threaded rods; a pulley assembly for driving between the two threaded rods.

[0008] As a preferred technical solution of the present invention, the limiting assembly includes: a fourth guide rod connected to one of the feeding plates; a positioning frame slidably connected to the fourth guide rod, and the positioning frame is slidably connected to the feeding plate; a second screw motor mounted on the other feeding plate, and the screw of the second screw motor is threadedly connected to the positioning frame.

[0009] As a preferred technical solution of the present invention, it further includes: air bags evenly spaced and connected to the side of one of the limiting plates; a control assembly disposed in one of the limiting plates for controlling the air bags to expand or contract.

[0010] As a preferred technical solution of the present invention, the control assembly includes: a hollow frame connected to the square hole on one side; a piston frame slidably connected to the hollow frame; a connecting pipe with both ends respectively connected to the hollow frame and the air bag and kept in communication; a connecting spring with both ends respectively connected to the hollow frame and the piston frame.

[0011] As a preferred technical solution of the present invention, it further includes: a guiding inclined plate connected to the bottom of the feeding plate.

[0012] As a preferred technical solution of the present invention, it further includes: a collection box connected to the frame, and the collection box is located directly below the feeding plate.

[0013] Beneficial effects: 1. Through the dislocation design of the limiting plate and the limiting insertion rod in cooperation with the square hole, the present invention can automatically straighten the bent diode leads under the drive of the lifting rod to ensure that the lead axes are aligned. Combining the wavy design of the cutting knife and the coordinated action of the cross plate, it can simultaneously perform differential cutting on two leads, effectively solving problems such as uneven cut and too long residue caused by lead deformation in traditional equipment, and significantly improving the cutting accuracy and consistency.

[0014] 2. The present invention utilizes the cooperation of the positioning frame and the second screw motor to realize batch positioning and batch isolation of diodes to avoid mixing. At the same time, the airbag expands under the action of the control component, which can form a flexible support for the root of the pin, preventing the thrust from damaging the connection between the pin and the diode during the straightening process, greatly reducing the risk of pin breakage and ensuring product yield.

[0015] 3. The present invention realizes the automation of the whole process from straightening, cutting to discharging by pre-straightening the pins through the guide inclined plate, quickly raising and lowering the cutter driven by the lifting mechanism, and automatically collecting the waste by the collection frame, which significantly reduces manual intervention, adapts to the needs of mass production, and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0017] Figure 2 This is a schematic diagram of the diodes of the present invention arranged on a discharge board.

[0018] Figure 3 This is a schematic diagram of the installation of the lifting rod, the first screw motor, the first guide rod and the limit plate of the present invention.

[0019] Figure 4 It is a schematic diagram of the specific structure of the limiting plate and the limiting rod of the present invention.

[0020] Figure 5 This is a schematic diagram of the installation of the second guide rod, the horizontal plate, the cutter and the second electric push rod of the present invention.

[0021] Figure 6 Schematic diagram of the specific structure of the cutter of the present invention.

[0022] Figure 7 Schematic diagram of the installation of the cutting assembly of the present invention.

[0023] Figure 8 Schematic diagram of the installation of the limit assembly of the present invention.

[0024] Figure 9 This is a schematic diagram of the specific structure of the positioning frame of the present invention.

[0025] Figure 10 Schematic diagram of the installation of the airbag of the present invention.

[0026] Figure 11 This is a schematic diagram of the installation of the hollow frame, piston rack and connecting pipe of the present invention.

[0027] Figure 12 This is a schematic diagram of the specific structure of the hollow frame, piston rack, connecting pipe and connecting spring of the present invention.

[0028] Wherein: 001 - diode, 1 - frame, 2 - feeding plate, 201 - inclined surface, 3 - first electric push rod, 4 - lifting rod, 5 - first lead screw motor, 6 - first guide rod, 7 - limit plate, 701 - square hole, 8 - limit insertion rod, 9 - mounting rod, 10 - second guide rod, 11 - cross plate, 12 - cutting knife, 13 - second electric push rod, 14 - U-shaped rod, 15 - third guide rod, 16 - threaded rod, 17 - driving motor, 18 - pulley assembly, 19 - fourth guide rod, 20 - positioning frame, 21 - second lead screw motor, 22 - airbag, 23 - hollow frame, 24 - piston frame, 25 - connecting pipe, 26 - connecting spring, 27 - material guiding inclined plate, 28 - collection box. Detailed implementation manner

[0029] Example: A diode processing and pin-cutting device, as Figures 1-9 shown, includes a frame 1, a feeding plate 2, a first electric push rod 3, a lifting rod 4, a first lead screw motor 5, a first guide rod 6, a limit plate 7, a limit insertion rod 8, a cutting assembly and a limit assembly. The upper part of the frame 1 is symmetrically connected with feeding plates 2 front and back. The longitudinal section shape of the feeding plate 2 is an inverted "T" shape, and there is a gap between the lower parts of the two feeding plates 2, and this gap can allow the pins of the diode 001 to pass through (as Figure 2 shown), so that the two feeding plates 2 can cooperate to limit the diode 001 thereon. The right sides of the lower parts of the two feeding plates 2 are both provided with inclined surfaces 201. The upper part of the frame 1 is symmetrically installed with first electric push rods 3 front and back. The telescopic rods of the two first electric push rods 3 are both connected with lifting rods 4. The left parts of the two lifting rods 4 are both installed with first lead screw motors 5. The right parts of the two lifting rods 4 are both connected with first guide rods 6. Limit plates 7 are slidably connected to the two first guide rods 6, and the limit plates 7 are slidably connected with the lifting rods 4. The left part of the limit plate 7 is threadedly connected with the lead screw of the first lead screw motor 5. A plurality of square holes 701 are evenly spaced on the side of the two limit plates 7 close to each other, and the square holes 701 on the front and back sides are arranged in a staggered manner. A plurality of groups of limit insertion rods 8 are evenly spaced on the side of the two limit plates 7 close to each other. The number of each group of limit insertion rods 8 is two, and the limit insertion rods 8 on the front and back sides are arranged in a staggered manner. When the two limit plates 7 move towards each other, the limit insertion rods 8 can be inserted into the square holes 701 longitudinally aligned with them. A cutting assembly for cutting the pins of the diode 001 is provided on the frame 1, and a limit assembly for limiting the diode 001 on the feeding plate 2 is provided on the feeding plate 2.

[0030] As Figures 5-7As shown in the figure, the cutting component includes a mounting rod 9, a second guide rod 10, a cross plate 11, a cutting knife 12, a second electric push rod 13 and a lifting mechanism. There are two mounting rods 9, and the two mounting rods 9 are symmetrically arranged front and back. The right parts of the two mounting rods 9 are both slidably connected with a second guide rod 10. The front end of the second guide rod 10 at the rear is connected to a cross plate 11, and the rear end of the second guide rod 10 at the front is connected to a cutting knife 12. The shape of the rear end of the cutting knife 12 is wavy, and there are two lowest points at the bottom of the wave, and the two lowest points are arranged staggeredly, so that the cutting knife 12 can cut the two pins of the diode 001 at the same time and ensure that the lengths of the two pins are different, which is convenient for distinguishing the two pins of the diode 001. The left parts of the two mounting rods 9 are both equipped with a second electric push rod 13, and the telescopic rods of the two second electric push rods 13 are respectively connected to the cross plate 11 and the cutting knife 12. A lifting mechanism for driving the mounting rod 9 to lift is provided on the frame 1; the lifting mechanism includes a U-shaped rod 14, a third guide rod 15, a threaded rod 16, a driving motor 17 and a pulley assembly 18. U-shaped rods 14 are connected to both the left and right sides of the frame 1. Third guide rods 15 are symmetrically connected front and back on the left U-shaped rod 14. The left parts of the two mounting rods 9 are respectively slidably connected with the two third guide rods 15. Threaded rods 16 are symmetrically rotatably connected front and back on the right U-shaped rod 14. The right parts of the two mounting rods 9 are respectively threadedly connected with the two threaded rods 16. The driving motor 17 is installed at the upper right rear side of the frame 1, and the output shaft of the driving motor 17 is connected to the upper end of the rear threaded rod 16. The pulley assembly 18 is composed of two pulleys and a flat belt. The two pulleys are respectively connected to the lower ends of the two threaded rods 16, and the flat belt is wound around the two pulleys so that the two threaded rods 16 can be driven through the pulley assembly 18.

[0031] As Figure 8 and Figure 9 shown in the figure, the limiting component includes a fourth guide rod 19, a positioning frame 20 and a second screw motor 21. The left part of the rear material placing plate 2 is connected with a fourth guide rod 19. A positioning frame 20 is slidably connected to the fourth guide rod 19, and the front and rear sides of the positioning frame 20 are respectively slidably connected to the two material placing plates 2. The positioning frame 20 is hollow, and the right side surface of the positioning frame 20 is a vertical plane for positioning the diode 001 on the material placing plate 2. The left side surface of the positioning frame 20 is an open design. The second screw motor 21 is installed on the left part of the front material placing plate 2, and the screw of the second screw motor 21 is threadedly connected to the positioning frame 20.

[0032] When the device needs to be used, first install the device at the designated position. Under the action of the inclined plane 201, the feeding conveyor can convey the diode 001 to the left between the two discharging plates 2. The two discharging plates 2 can limit the diode 001 thereon, and by the diode 001 on the right pushing the diode 001 on the left, the diode 001 can move to the left on the discharging plate 2. When a specified number of diodes 001 are placed on the discharging plate 2, the leftmost diode 001 will contact the positioning frame 20, and the positioning frame 20 plays a positioning role. At this time, the conveyor no longer conveys the diode 001 to the discharging plate 2; then drive the limiting plates 7 on the front and rear sides to move towards each other along the first guiding rod 6 by the first lead screw motor 5. The limiting plates 7 drive the limiting insertion rods 8 on the front and rear sides to move towards each other, so that the limiting insertion rods 8 are inserted into the corresponding square holes 701. At this time, a rectangular space can be formed between two adjacent groups of limiting insertion rods 8 and the two limiting plates 7, and there is a lead of a diode 001 in each rectangular space. It should be noted that neither the limiting insertion rods 8 nor the limiting plates 7 contact the root of the lead. Then drive the lifting rod 4 to move downward by the first electric push rod 3. The lifting rod 4 can drive the limiting plate 7 and the limiting insertion rod 8 to move downward. Since neither the limiting insertion rod 8 nor the limiting plate 7 contacts the root of the lead, when the limiting plate 7 and the limiting insertion rod 8 move downward, they will not apply a downward pulling force to the lead, preventing the lead from detaching from the diode 001. When the limiting plate 7 and the limiting insertion rod 8 contact the bent part of the lead, the limiting plate 7 and the limiting insertion rod 8 can push the bent part of the lead towards the direction close to the axis of the lead, so as to straighten the automatic lead. After the straightening is completed, drive the lifting rod 4 to move upward to reset by the first electric push rod 3. The lifting rod 4 can drive the limiting plate 7 and the limiting insertion rod 8 to move upward to reset;Then, the driving motor 17 is used to drive the rear threaded rod 16 to rotate. Through the transmission of the pulley assembly 18, the rear threaded rod 16 can drive the front threaded rod 16 to rotate. The threaded rod 16 can drive the mounting rod 9 to move downward along the third guide rod 15. The mounting rod 9 can drive the cross plate 11 and the cutting knife 12 to move downward to a specified height. Then, the second electric push rod 13 is used to drive the cross plate 11 and the cutting knife 12 to move toward each other. With the cooperation of the cross plate 11, the cutting knife 12 can cut the pins of each diode 001 simultaneously. After the cutting is completed, the second electric push rod 13 is used to drive the cross plate 11 and the cutting knife 12 to move away from each other to reset. Then, the driving motor 17 is used to drive the threaded rod 16 to reverse. The threaded rod 16 can drive the mounting rod 9 to move upward to reset. The mounting rod 9 can drive the cross plate 11 and the cutting knife 12 to move upward to reset. Then, the second lead screw motor 21 is used to drive the positioning frame 20 to move upward along the fourth guide rod 19, so that the positioning frame 20 no longer blocks the leftmost diode 001. Then, the next batch of diodes 001 can be conveyed to the feeding plate 2 one by one through the feeding conveyor. The next batch of diodes 001 will push the cut diodes 001 to move leftward to the discharging conveyor for discharging. When all the next batch of diodes 001 are conveyed to the feeding plate 2, the second lead screw motor 21 is used to drive the positioning frame 20 to move downward to reset. The positioning frame 20 can separate the two batches of diodes 001 (that is, the leftmost diode 001 in the next batch of diodes 001 will contact the right side surface of the positioning frame 20, and the rightmost diode 001 in the cut batch of diodes 001 will be covered in the positioning frame 20), and the positioning frame 20 can position the next batch of diodes 001. By repeating the above operations, the pins of the diodes 001 can be automatically straightened and cut in batches, improving the overall work efficiency and product quality.

[0033] As Figures 10-12 shown, it further includes an airbag 22 and a control component. Multiple airbags 22 are connected at intervals from left to right on the upper part of the front side of the rear limiting plate 7. A control component for controlling the inflation or contraction of the airbag 22 is provided inside the rear limiting plate 7; the control component includes a hollow frame 23, a piston frame 24, a connecting pipe 25, and a connecting spring 26. The inner walls of the respective square holes 701 on the rear limiting plate 7 are all connected with a hollow frame 23. The hollow frames 23 correspond to the airbags 22 one by one. A piston frame 24 is slidably connected to the front side of the hollow frame 23. The piston frame 24 is in the shape of a "worker". Connecting pipes 25 are connected between the top of each hollow frame 23 and the rear end of its corresponding airbag 22 and kept in communication. A connecting spring 26 is wound around the middle of each piston frame 24, and the two ends of the connecting spring 26 are respectively connected to the hollow frame 23 and the piston frame 24.

[0034] When the two limit plates 7 move towards each other, the limit plates 7 can drive the limit insertion rods 8 to gradually insert into the corresponding square holes 701. At the same time, the rear limit plate 7 will drive the airbag 22 to move forward, so that each airbag 22 is inserted between the roots of two adjacent pins. When the front limit insertion rod 8 contacts the front side of the piston frame 24, the front limit insertion rod 8 will push the piston frame 24 to move backward, the connecting spring 26 is compressed, and the piston frame 24 will squeeze the air in the hollow frame 23, so that the air in the hollow frame 23 enters the airbag 22 through the connecting pipe 25. The airbag 22 expands, so that the airbag 22 can contact the root of the pin. At this time, the airbag 22 can support and fix the root of the pin. When the limit plates 7 and the limit insertion rods 8 straighten the pins, the thrust received by the pins can be transmitted only to the contact position between the pins and the airbag 22, so as to prevent the connecting part of the pins and the diode 001 from receiving the thrust, and further prevent the pins of the diode 001 from breaking and falling off. When the two limit plates 7 move away from each other and reset, the limit plates 7 can drive the limit insertion rods 8 to gradually disengage from the square holes 701. At this time, the front limit insertion rod 8 will disengage from the piston frame 24, the connecting spring 26 returns to its original state, driving the piston frame 24 to move forward and reset. The piston frame 24 can draw the air in the airbag 22 back into the hollow frame 23, so that the airbag 22 shrinks and restores and disengages from the pin. At the same time, the rear limit plate 7 will drive the airbag 22 to move backward and reset.

[0035] As Figure 1 shown, it further includes a material guiding inclined plate 27 and a collection box 28. The right sides of the bottoms of the two feeding plates 2 are both connected with a material guiding inclined plate 27, and the lower part of the frame 1 is connected with a collection box 28, and the collection box 28 is located directly below the feeding plate 2.

[0036] When the feeding conveyor conveys the diode 001 to the left onto the feeding plate 2, the diode 001 will first contact the material guiding inclined plate 27, and the pins of the diode 001 can be preliminarily straightened by the extrusion of the material guiding inclined plate 27, which is convenient for the subsequent limit plates 7 and the limit insertion rods 8 to straighten the pins of the diode 001 for the second time; when the cutting knife 12 cuts the pins of the diode 001, the cut pin parts will fall downward into the collection box 28 due to the action of gravity for unified collection.

Claims

1. A diode processing and lead-cutting device, comprising: a frame (1); characterized in that, It further includes: a feeding plate (2) symmetrically connected to the frame (1), and a slope (201) is provided on one side of the feeding plate (2); a first electric push rod (3) symmetrically installed on the frame (1); a lifting rod (4) connected to the telescopic rod of the first electric push rod (3); a first screw motor (5) installed on the lifting rod (4); a first guide rod (6) connected inside the lifting rod (4); a limit plate (7) slidably connected to the first guide rod (6), square holes (701) are evenly spaced on the side of the limit plate (7), the limit plate (7) is slidably connected to the lifting rod (4), and the limit plate (7) is threadedly connected to the screw of the first screw motor (5); limit insertion rods (8) symmetrically and spacedly connected to the side of the limit plate (7); a cutting component provided on the frame (1) for cutting the pins of the diode (001); a limit component provided on the feeding plate (2) for limiting the diode (001) on the feeding plate (2).

2. A diode processing and leg-cutting device according to claim 1, characterized in that, The cutting component includes: a lifting mechanism provided on the frame (1); mounting rods (9) symmetrically provided on the lifting mechanism, and the lifting mechanism is used to drive the mounting rods (9) to lift; a second guide rod (10) slidably connected to the mounting rods (9); a cross plate (11) connected to the end of one of the second guide rods (10); a cutting knife (12) connected to the end of the other second guide rod (10); a second electric push rod (13) installed on the side of the mounting rod (9), and the telescopic rods of the second electric push rod (13) are respectively connected to the cross plate (11) and the cutting knife (12).

3. A diode processing and lead-cutting device according to claim 2, characterized in that, The lifting mechanism includes: U-shaped rods (14) symmetrically connected to the frame (1); third guide rods (15) symmetrically connected to one of the U-shaped rods (14), and the third guide rods (15) are slidably connected to the mounting rods (9); threaded rods (16) symmetrically rotatably connected to the other U-shaped rod (14), and the threaded rods (16) are threadedly connected to the mounting rods (9); a driving motor (17) installed on the frame (1), and the output shaft of the driving motor (17) is connected to the end of one of the threaded rods (16); a pulley assembly (18) for driving between the two threaded rods (16).

4. A diode processing and lead trimming device according to claim 1, characterized in that, The limit component includes: a fourth guide rod (19) connected inside one of the feeding plates (2); a positioning frame (20) slidably connected to the fourth guide rod (19), and the positioning frame (20) is slidably connected to the feeding plate (2); a second screw motor (21) installed on the other feeding plate (2), and the screw of the second screw motor (21) is threadedly connected to the positioning frame (20).

5. A diode processing and lead-cutting device according to claim 1, characterized in that, It further includes: air bags (22) evenly spaced and connected to the side of one of the limit plates (7); a control component provided inside one of the limit plates (7) for controlling the inflation or deflation of the air bags (22).

6. A diode processing and lead-cutting device according to claim 5, characterized in that, The control component includes: a hollow frame (23) connected within a square hole (701) on one side thereof; a piston frame (24) slidably connected to the hollow frame (23); a connecting pipe (25) with two ends respectively connected to the hollow frame (23) and the airbag (22) and kept in communication; a connecting spring (26) with two ends respectively connected to the hollow frame (23) and the piston frame (24).

7. A diode processing and lead cutting device according to claim 1, characterized in that, It further includes: a material guiding inclined plate (27) connected to the bottom of the material discharging plate (2).

8. A diode processing and lead cutting device according to claim 1, characterized in that, It further includes: a collection box (28) connected to the machine frame (1), and the collection box (28) is located directly below the material discharging plate (2).

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