Gradient electroplating processing system of high-heat-dissipation copper alloy lead frame

Abstract

The invention relates to the technical field of electroplating, and discloses a gradient electroplating processing device for a high-heat-dissipation copper alloy lead frame, the gradient electroplating processing device comprises a reaction chamber, one side of the reaction chamber is fixedly connected with a communicating pipe, and one side of the communicating pipe is fixedly connected with a conveying main body. The first driving motor is started to drive the first rotating shaft to rotate, the first rotating shaft rotates to drive the insulating shafts to rotate through the first belt wheel and the first transmission belt, and one insulating shaft can rotate synchronously through the multiple sets of second belt wheels and second transmission belts after rotating, so that driving of the lead frame is guaranteed; the lead frame is moved in the electroplating water, so that the electroplating work of the lead frame is completed, and synchronous electroplating of multiple pieces in the same batch can be realized in the process, so that the single-time treatment capacity is greatly improved, and the problem of insufficient capacity caused by limitation of the number of clamps in a traditional suspension type process is effectively solved.

Description

Technical Field

[0001] The present application relates to the field of electroplating technology, and in particular to a gradient electroplating processing system for a high heat dissipation copper alloy lead frame. Background Art

[0002] As the chip carrier of integrated circuits, the lead frame is a key structural component that uses bonding materials (gold wire, aluminum wire, copper wire) to achieve electrical connection between the internal circuit lead ends of the chip and the external leads to form an electrical circuit. It acts as a bridge to connect with external wires. The lead frame needs to be electroplated before use to improve the corrosion resistance of the surface. Its electroplating device has the advantages of simple structure, easy operation, and good electroplating effect.

[0003] However, in the existing gradient electroplating processing equipment for lead frames, the lead frame to be electroplated is usually suspended by a clamping mechanism. After the lead frame is installed, the lead frame is placed inside a reaction tank and then a layer of metal is plated on the surface of the lead frame by electrolysis, thereby completing the electroplating of the lead frame. In this process, the number of plates plated in the same batch is affected by the clamp and the electroplating tank, and batch processing cannot be achieved, resulting in a long production cycle and limited production capacity. In addition, the upper and lower hangers, clamping and other operations rely on manual labor, which has high labor costs. In addition, if the clamping position is unreasonable or the hanger has poor conductivity during clamping, local overheating, burning or coating shedding may occur. Secondly, the fine pins of the lead frame may be deformed due to current shock or clamping stress during the electroplating process, affecting dimensional accuracy. Summary of the Invention

[0004] The present application proposes a gradient electroplating processing system for a high heat dissipation copper alloy lead frame, which has the advantage of continuous operation and is used to solve the problem that batch processing cannot be achieved due to the influence of fixtures and electroplating pools during electroplating.

[0005] To achieve the above-mentioned object, the present application adopts the following technical solution: a gradient electroplating processing device for a high-heat-dissipating copper alloy lead frame, comprising a reaction chamber, a connecting pipe fixedly connected to one side of the reaction chamber, and a conveying body fixedly connected to one side of the connecting pipe; A clean water tank is provided on one side of the reaction chamber, and a cleaning component is provided on one side of the clean water tank; Two sets of mounting plates are fixedly connected to the interior of the reaction chamber, and multiple sets of conductive rollers are rotatably connected to the interior of the two sets of mounting plates. Insulating shafts are fixedly sleeved inside the multiple sets of conductive rollers, and a driving assembly is provided on one side of the insulating shaft; The bottoms of the two groups of mounting plates are fixedly connected to fixed base plates, and the bottoms of the fixed base plates are provided with adjustment components; An ionization component is provided on one side of the mounting plate, and a guide component is provided in the middle of the two groups of mounting plates.

[0006] Preferably, the cleaning component includes a first water pipe, one end of the first water pipe is fixedly connected to one side of the cleaning water tank, the other end of the first water pipe is fixedly connected to a water pump, the top of the water pump is fixedly connected to a second water pipe, the second water pipe is fixedly connected to the reaction chamber, the reaction chamber and the cleaning water tank are connected through the first water pipe, the water pump and the second water pipe, and one side of the reaction chamber is fixedly connected to a water outlet.

[0007] Preferably, the drive assembly includes a first drive motor, which is arranged on one side of the reaction chamber. The output end of the first drive motor is fixedly connected to the first rotating shaft, and the outer sides of the first rotating shaft and the insulating shaft are fixedly connected to the first pulley. A first transmission belt is sleeved between the two groups of the first pulleys. The insulating shaft and the first rotating shaft are connected through the first pulley, so that the first drive motor can transmit the rotational motion through the first transmission belt to rotate the insulating shaft.

[0008] Preferably, the drive assembly also includes multiple groups of second pulleys, and the multiple groups of second pulleys are fixedly sleeved on the outer side of the insulating shaft, and the outer side of each two groups of the second pulleys is sleeved with a second transmission belt. The multiple groups of insulating shafts realize multi-axis transmission through the second pulleys and the second transmission belt, so that the multiple groups of insulating shafts can achieve synchronous movement through the rotation of the first drive motor.

[0009] Preferably, the adjustment assembly includes multiple groups of adjustment wheels, and the multiple groups of adjustment wheels are arranged in the middle of the two groups of mounting plates. The adjustment wheels are arranged at the bottom of the conductive roller and do not contact the conductive roller. The internal fixed sleeve of the adjustment wheel is connected to a movable shaft, one side of the movable shaft is fixedly connected to a fixed plate, and the middle section of the bottom of the fixed plate is fixedly connected to an adjustment column.

[0010] Preferably, the adjustment component also includes a second drive motor, which is arranged inside the reaction chamber, and the bottom of the inner surface of the reaction chamber is fixedly connected to a fixed block, the second drive motor is fixedly connected to one side of the fixed block, and the output end of the second drive motor is fixedly connected to one end of the second rotating shaft, the second rotating shaft is movably connected to the inside of the fixed block, and the other end of the second rotating shaft is fixedly connected to an eccentric wheel, and the eccentric wheel is a concave circular ring structure.

[0011] Preferably, the adjusting assembly also includes a sliding block, which is fixedly connected to the bottom of the adjusting column, one side of the sliding block is fixedly connected to one end of the connecting column, and the other end of the connecting column is fixedly connected to a pressure wheel, the outer surface of the pressure wheel abuts the inner surface of the concave ring of the eccentric wheel, the top of the sliding block is fixedly connected to one end of a spring, the other end of the spring is fixedly connected to the fixed bottom plate, the spring is movably sleeved on the outside of the adjusting column, one side of the interior of the sliding block is movably sleeved on a limiting column, one end of the limiting column is fixedly connected to the fixed bottom plate, and the other end of the limiting column is fixedly connected to the reaction chamber.

[0012] Preferably, the ionization component includes a connecting block, which is fixedly connected to one side of one of the mounting plates, and a power supply cathode is fixedly connected to one side of the top of the connecting block. A connecting shaft is fixedly connected to the inside of the connecting block, and the connecting shaft is movably sleeved inside the conductive roller. The power supply cathode is electrically connected to the power supply cathode and the conductive roller. After the external power supply is started, the connecting shaft and the power supply anode are converted into connecting conductors through the power supply cathode, thereby conducting current to the lead frame to realize indirect conduction. A first guide plate is provided on the other side of the top of the connecting block, and the power supply cathode and the first guide plate are both fixedly connected to the reaction chamber. The first guide plate is not in contact with the connecting block, but is in contact with the electroplating water during electroplating.

[0013] Preferably, the guide assembly includes two groups of first guide plates, the first guide plates are fixedly connected to the reaction chamber, the two groups of first guide plates are symmetrically arranged on both sides of the inside of the reaction chamber, a second guide plate is arranged between the multiple groups of adjusting wheels, the second guide plate is fixedly connected to the mounting plate, the two sides of the second guide plate are inclined surfaces, the inclined surfaces are matched with the bending curvature of the adjusting wheel, the length of the second guide plate is equal to that of the adjusting wheel, which is convenient for guiding the electroplated lead frame, and a feed port and a discharge port are respectively provided on both sides of the reaction chamber, and the feed port and the discharge port are both arranged corresponding to the two groups of first guide plates.

[0014] The present invention also provides a gradient electroplating processing system for a high heat dissipation copper alloy lead frame, comprising the following steps: S1. Delivering the lead frame to be processed into the interior of the reaction chamber through the feed port; S2. Start the second drive motor to drive the second rotating shaft to rotate. The rotation of the second rotating shaft drives the eccentric wheel to rotate. After the eccentric wheel rotates, its eccentric setting causes the pressure wheel inside the eccentric wheel to move up and down, thereby being able to adjust according to the height of the lead frame, so that it can adapt to lead frames of more sizes. At the same time, the presence of the spring provides a pressure buffer for the lead frame, preventing the lead frame from being damaged due to excessive pressure; S3. After the adjustment is completed, the first drive motor is started to drive the first rotating shaft to rotate. The first rotating shaft drives the insulating shaft to rotate through the first pulley and the first transmission belt. After one of the insulating shafts rotates, it can be synchronously rotated through the multiple sets of second pulleys and the second transmission belt, thereby ensuring the drive of the lead frame, so that the lead frame moves in the electroplating water, thereby completing the electroplating work on the lead frame; S4. After the drive assembly is working, the cathode of the power supply is connected to the cathode of the power supply through an external power supply. At this time, the conductive roller becomes part of the cathode. The conductive roller provides current to the lead frame through rolling contact with the lead frame, avoiding the problem of excessive single-point contact resistance of traditional hangers. At the same time, multi-point rolling contact can disperse the current and reduce local hot spots. S5. When the driving assembly continues to move, one end of the lead frame is slowly transported out of the reaction chamber. At this time, the composition, thickness, or structure of the coating can be continuously or gradiently changed by increasing the speed of the first driving motor or increasing the current, thereby achieving gradient electroplating. S6. When all the lead frames are output to the outside of the reaction chamber, the work is completed.

[0015] The beneficial effects of the present invention are as follows: The present invention starts a first driving motor to drive the first rotating shaft to rotate. After the first rotating shaft rotates, the insulating shaft is driven to rotate through the first pulley and the first transmission belt. After one of the insulating shafts rotates, it can be rotated synchronously through multiple sets of second pulleys and the second transmission belt, thereby ensuring the drive of the lead frame, so that the lead frame moves in the electroplating water, thereby completing the electroplating work of the lead frame. In this process, multiple pieces of the same batch can be electroplated synchronously, thereby greatly improving the single processing volume, and effectively solving the problem of insufficient production capacity caused by the limited number of fixtures in the traditional suspension process. At the same time, since the insulating shafts are forced to rotate synchronously through the transmission belt, it is ensured that all lead frames move at the same speed and posture, avoiding the problem of uneven coating thickness caused by swinging or position difference in the traditional suspension.

[0016] The present invention starts the second driving motor to drive the second rotating shaft to rotate, and the second rotating shaft drives the eccentric wheel to rotate after the rotation of the eccentric wheel. After the eccentric wheel rotates, its eccentric setting will cause the pressure wheel inside the eccentric wheel to move up and down. The up and down movement of the pressure wheel will drive the sliding block and the adjusting column to move up and down through the connecting column, thereby driving the fixed plate to move up and down. The up and down movement of the fixed plate can drive the movable shaft and the adjusting wheel to move up and down, so that it can be adjusted according to the height size of the lead frame, so that it can adapt to lead frames of more sizes. At the same time, the height adaptation can be completed in real time during the lead frame transportation process, reducing the traditional downtime adjustment time and improving the continuity of the production line. At the same time, the presence of the spring provides a pressure buffer for the lead frame, avoiding damage to the lead frame due to excessive pressure. During processing, it not only ensures the stable fixation of the lead frame during processing, but also avoids deformation or damage of the material due to excessive pressure. It is particularly suitable for processing thin or fragile materials.

[0017] The present invention connects the cathode of the power supply to the cathode of the power supply through an external power supply. At this time, the conductive roller becomes a part of the cathode. The conductive roller provides current to the lead frame through rolling contact with the lead frame, avoiding the problem of excessive single-point contact resistance of traditional hangers. At the same time, multi-point rolling contact can disperse the current and reduce local hot spots. During operation, it can effectively prevent the thin pins of the lead frame from being deformed due to current shock or clamping stress during the electroplating process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which constitute a part of the specification, illustrate embodiments disclosed in the present application and, together with the description, serve to explain the principles disclosed in the present application in a clear and understandable manner.

[0019] The present disclosure can be more clearly understood from the following detailed description with reference to the accompanying drawings, in which: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the side structure of the overall structure of the present invention; Figure 3 Schematic diagram of the internal structure of the reaction chamber of the present invention; Figure 4 is a cross-sectional view of the limiting column of the present invention; Figure 5 Schematic diagram of the structure of the second guide plate of the present invention; Figure 6 This is a schematic diagram of the structure of the regulating component of the present invention; Figure 7 This is a schematic diagram of the internal structure of the connecting block of the present invention; Figure 8 Schematic diagram of the internal structure of the conductive roller of the present invention.

[0020] Among them: 1. reaction chamber; 2. connecting pipe; 3. clean water tank; 4. first water pipe; 5. water pump; 6. second water pipe; 7. first drive motor; 8. first rotating shaft; 9. mounting plate; 10. conductive roller; 11. insulating shaft; 12. first pulley; 13. first transmission belt; 14. second pulley; 15. second transmission belt; 16. adjusting wheel; 17. movable shaft; 18. fixed plate; 19. second drive motor; 20. fixed block; 21. second rotating shaft; 22. eccentric wheel; 23. adjusting column; 24. sliding block; 25. connecting column; 26. pressure wheel; 27. spring; 28. limiting column; 29. ​​fixed bottom plate; 30. connecting block; 31. power cathode; 32. connecting shaft; 34. power anode; 35. first guide plate; 36. second guide plate; 37. feed port; 38. discharge port; 39. water outlet; 40. conveying body. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0022] See also Figure 1-8 The embodiment of the present invention provides a gradient electroplating processing device for a high heat dissipation copper alloy lead frame, comprising a reaction chamber 1, a connecting pipe 2 is fixedly connected to one side of the reaction chamber 1, and a conveying body 40 is fixedly connected to one side of the connecting pipe 2; A clean water tank 3 is provided on one side of the reaction chamber 1, and a cleaning component is provided on one side of the clean water tank 3; Two sets of mounting plates 9 are fixedly connected to the interior of the reaction chamber 1. Multiple sets of conductive rollers 10 are rotatably connected to the interior of the two sets of mounting plates 9. Insulating shafts 11 are fixedly sleeved inside the multiple sets of conductive rollers 10. A driving assembly is provided on one side of the insulating shafts 11. The bottom of the two sets of mounting plates 9 are fixedly connected to a fixed base plate 29, and an adjustment component is provided at the bottom of the fixed base plate 29; An ionization component is provided on one side of the mounting plate 9, and a guide component is provided in the middle of the two sets of mounting plates 9; The cleaning assembly includes a first water pipe 4, one end of which is fixedly connected to one side of the clean water tank 3, the other end of the first water pipe 4 is fixedly connected to a water pump 5, the top of the water pump 5 is fixedly connected to a second water pipe 6, the second water pipe 6 is fixedly connected to the reaction chamber 1, and the reaction chamber 1 and the clean water tank 3 are connected through the first water pipe 4, the water pump 5 and the second water pipe 6. A water outlet 39 is fixedly connected to one side of the reaction chamber 1; The water flow inside the clean water tank 3 is transported to the interior of the reaction chamber 1 through the first water pipe 4 and the second water pipe 6 by the water pump 5, thereby flushing the interior of the reaction chamber 1. The flushed water flow is discharged through the water outlet 39. By timely flushing the residual substances on the walls and corners of the reaction chamber, the poor adhesion or surface defects of the next batch of coatings caused by the accumulation of pollutants are reduced.

[0023] Among them, the driving assembly includes a first driving motor 7, which is arranged on one side of the reaction chamber 1, and the output end of the first driving motor 7 is fixedly connected to the first rotating shaft 8, and the outer sides of the first rotating shaft 8 and the insulating shaft 11 are fixedly connected to the first pulley 12, and a first transmission belt 13 is sleeved between the two groups of first pulleys 12. The insulating shaft 11 and the first rotating shaft 8 are connected through the first pulley 12, so that the first driving motor 7 transmits the rotational motion through the first transmission belt 13 to rotate the insulating shaft 11. The driving assembly also includes multiple groups of second pulleys 14, and the multiple groups of second pulleys 14 are fixedly sleeved on the outer sides of the insulating shaft 11. The outer sides of every two groups of second pulleys 14 are sleeved with second transmission belts 15. The multiple groups of insulating shafts 11 realize multi-axis transmission through the second pulleys 14 and the second transmission belts 15, so that the multiple groups of insulating shafts 11 can realize synchronous movement through the rotation of the first driving motor 7; By starting the first drive motor 7 to drive the first rotating shaft 8 to rotate, the first rotating shaft 8 drives the insulating shaft 11 to rotate through the first pulley 12 and the first transmission belt 13. After one of the insulating shafts 11 rotates, it can be rotated synchronously through multiple sets of second pulleys 14 and the second transmission belt 15, thereby ensuring the drive of the lead frame and moving the lead frame in the electroplating water, thereby completing the electroplating work of the lead frame. In this process, multiple pieces of the same batch can be electroplated synchronously, thereby greatly improving the single processing volume, and effectively solving the problem of insufficient production capacity caused by the limited number of fixtures in the traditional suspension process. At the same time, since the insulating shaft 11 is forced to rotate synchronously through the transmission belt, it is ensured that all lead frames move at the same speed and posture, avoiding the problem of uneven coating thickness caused by swinging or position difference in the traditional suspension.

[0024] Among them, the adjustment component includes multiple groups of adjusting wheels 16, and the multiple groups of adjusting wheels 16 are all arranged in the middle of the two groups of mounting plates 9. The adjusting wheel 16 is arranged at the bottom of the conductive roller 10 and does not contact the conductive roller 10. The interior of the adjusting wheel 16 is fixedly sleeved with a movable shaft 17, and one side of the movable shaft 17 is fixedly connected to a fixed plate 18. The middle section of the bottom of the fixed plate 18 is fixedly connected to an adjusting column 23. The adjustment component also includes a second drive motor 19, which is arranged inside the reaction chamber 1, and the bottom of the inner surface of the reaction chamber 1 is fixedly connected to a fixed block 20. The second drive motor 19 is fixedly connected to one side of the fixed block 20, and the output end of the second drive motor 19 is fixedly connected to one end of the second rotating shaft 21. The second rotating shaft 21 is movably sleeved with the interior of the fixed block 20. The other end of the second rotating shaft 21 is fixedly connected to the eccentric wheel 22, and the eccentric wheel 22 is a concave ring structure. The adjusting assembly also includes a sliding block 24, which is fixedly connected to the bottom of the adjusting column 23. One side of the sliding block 24 is fixedly connected to one end of the connecting column 25, and the other end of the connecting column 25 is fixedly connected to the pressure wheel 26. The outer surface of the pressure wheel 26 abuts against the inner surface of the concave ring of the eccentric wheel 22. The top of the sliding block 24 is fixedly connected to one end of the spring 27, and the other end of the spring 27 is fixedly connected to the fixed bottom plate 29. The spring 27 is movably sleeved on the outer side of the adjusting column 23. One side of the interior of the sliding block 24 is movably sleeved with a limiting column 28, one end of the limiting column 28 is fixedly connected to the fixed bottom plate 29, and the other end of the limiting column 28 is fixedly connected to the reaction chamber 1; By starting the second drive motor 19 to drive the second rotating shaft 21 to rotate, the second rotating shaft 21 drives the eccentric wheel 22 to rotate after the rotation of the eccentric wheel 22. After the eccentric wheel 22 rotates, due to its eccentric setting, the pressure wheel 26 inside the eccentric wheel 22 will move up and down. The up and down movement of the pressure wheel 26 will drive the sliding block 24 and the adjusting column 23 to move up and down through the connecting column 25, thereby driving the fixed plate 18 to move up and down. The up and down movement of the fixed plate 18 can drive the movable shaft 17 and the adjusting wheel 16 to move up and down, so that it can be adjusted according to the height size of the lead frame, so that it can adapt to lead frames of more sizes. At the same time, the height adaptation can be completed in real time during the lead frame transportation process, reducing the traditional downtime adjustment time and improving production. The continuity of the production line, and the presence of the spring 27 provides a pressure buffer for the lead frame, avoiding damage to the lead frame due to excessive pressure. During processing, it ensures the stability of the lead frame and avoids deformation or damage of the material due to excessive pressure. It is especially suitable for the processing of thin or fragile materials. Secondly, the insulating shaft 11 and the transmission belt system replace the traditional metal hanger, reducing the resistance loss of the hanger itself, reducing energy waste and heat risk, and improving the current transmission efficiency, which is conducive to the precise control of gradient plating. Finally, the synchronous drive avoids uneven current distribution caused by swinging or tilting of the hanger, which is especially suitable for gradient electroplating of lead frames with complex shapes, improving the uniformity and adhesion of the plating.

[0025] Among them, the ionization component includes a connecting block 30, which is fixedly connected to one side of one of the mounting plates 9, and a power cathode 31 is fixedly connected to one side of the top of the connecting block 30. A connecting shaft 32 is fixedly connected to the inside of the connecting block 30, and the connecting shaft 32 is movably sleeved inside the conductive roller 10. The power cathode 31 is electrically connected to the power cathode 31 and the conductive roller 10. After the external power supply is started, the connecting shaft 32 and the power anode 34 are transformed into connecting conductors through the power cathode 31, thereby conducting current to the lead frame to achieve indirect conduction. A first guide plate 35 is provided on the other side of the top of the connecting block 30. The power cathode 31 and the first guide plate 35 are both fixedly connected to the reaction chamber 1. The first guide plate 35 does not contact the connecting block 30 and contacts with the electroplating water during electroplating; The power cathode 31 is connected to the cathode of the power supply through an external power supply. At this time, the conductive roller 10 becomes a part of the cathode. The conductive roller 10 provides current to the lead frame through rolling contact with the lead frame, avoiding the problem of excessive single-point contact resistance of traditional hangers. At the same time, multi-point rolling contact can disperse the current and reduce local hot spots. During operation, it can effectively prevent the thin pins of the lead frame from being deformed due to current shock or clamping stress during the electroplating process.

[0026] Among them, the guide assembly includes two groups of first guide plates 35, the first guide plates 35 are fixedly connected to the reaction chamber 1, and the two groups of first guide plates 35 are symmetrically arranged on both sides of the reaction chamber 1. A second guide plate 36 is provided between the multiple groups of adjustment wheels 16, and the second guide plate 36 is fixedly connected to the mounting plate 9. The two sides of the second guide plate 36 are inclined surfaces, and the inclined surfaces match the bending curvature of the adjustment wheel 16. The length of the second guide plate 36 is equal to that of the adjustment wheel 16 to facilitate guiding the electroplated lead frame. A feed port 37 and a discharge port 38 are respectively provided on both sides of the reaction chamber 1, and the feed port 37 and the discharge port 38 are both arranged corresponding to the two groups of first guide plates 35; During operation, the symmetrically arranged first guide plate 35 cooperates with the inclined second guide plate 36 to ensure that the lead frame maintains linear motion during the feeding and unloading process, reducing shaking or offset and improving the electroplating position accuracy. Secondly, the inclined surface of the second guide plate 36 matches the bending curvature of the adjusting wheel 16, thereby forming smooth contact, reducing movement resistance, and avoiding jamming or scratching the lead frame surface. Then, the length of the second guide plate 36 is equal to that of the adjusting wheel 16 to achieve full support, compatible with lead frames of different sizes, and convenient for modular replacement or maintenance. Finally, stable guidance will reduce the swing of the lead frame and avoid uneven current distribution due to posture changes, thereby improving the uniformity and adhesion of the plating.

[0027] The working steps are as follows: S1, delivering the lead frame to be processed into the interior of the reaction chamber 1 through the feed port 37; S2. Start the second drive motor 19 to drive the second rotating shaft 21 to rotate. The rotation of the second rotating shaft 21 drives the eccentric wheel 22 to rotate. After the eccentric wheel 22 rotates, its eccentric setting causes the pressure wheel 26 inside the eccentric wheel 22 to move up and down, thereby being able to adjust according to the height of the lead frame, so that it can adapt to lead frames of more sizes. At the same time, the presence of the spring 27 provides a pressure buffer for the lead frame, preventing damage to the lead frame due to excessive pressure; S3. After the adjustment is completed, the first drive motor 7 is started to drive the first rotating shaft 8 to rotate. The first rotating shaft 8 drives the insulating shaft 11 to rotate through the first pulley 12 and the first transmission belt 13. After one of the insulating shafts 11 rotates, it can be synchronously rotated through the multiple sets of second pulleys 14 and the second transmission belt 15, thereby ensuring the drive of the lead frame, so that the lead frame moves in the electroplating water, thereby completing the electroplating work on the lead frame; S4. After the drive assembly is working, the power cathode 31 is connected to the cathode of the power supply through an external power supply. At this time, the conductive roller 10 becomes part of the cathode. The conductive roller 10 provides current to the lead frame through rolling contact with the lead frame, avoiding the problem of excessive single-point contact resistance of traditional hangers. At the same time, multi-point rolling contact can disperse the current and reduce local hot spots. S5. When the driving component continues to move, one end of the lead frame will slowly be transported out of the interior of the reaction chamber 1. At this time, the rotation speed of the first driving motor 7 can be increased or the current can be increased to make the composition, thickness or structure of the coating show continuous or gradient changes, thereby realizing gradient electroplating.

[0028] S6. When all the lead frames are output to the outside of the reaction chamber 1, the work is completed.

[0029] Working principle: The lead frame to be processed is conveyed into the interior of the reaction chamber 1 through the feed port 37. At this time, the second drive motor 19 is started to drive the second rotating shaft 21 to rotate. The rotation of the second rotating shaft 21 drives the eccentric wheel 22 to rotate. After the eccentric wheel 22 rotates, its eccentric setting causes the pressure wheel 26 inside the eccentric wheel 22 to move up and down. The up and down movement of the pressure wheel 26 drives the sliding block 24 and the adjustment column 23 to move up and down through the connecting column 25, thereby driving the fixed plate 18 to move up and down. The up and down movement of the fixed plate 18 can drive the movable shaft 17 and the adjustment wheel 16 to move up and down, so that the lead frame can be adjusted according to its height size, so that it can adapt to lead frames of more sizes. At the same time, the height adaptation can be completed in real time during the lead frame conveying process, reducing the traditional downtime adjustment time and improving the continuity of the production line. At the same time, the presence of the spring 27 provides a pressure buffer for the lead frame, avoiding damage to the lead frame due to excessive pressure. During processing, it ensures that the lead frame is stably fixed during processing and avoids deformation or damage of the material due to excessive pressure. It is particularly suitable for processing thin or fragile materials. After the adjustment is completed, the first drive motor 7 is started to drive the first rotating shaft 8 to rotate. After the first rotating shaft 8 rotates, the insulating shaft 11 is driven to rotate through the first pulley 12 and the first transmission belt 13. After one of the insulating shafts 11 rotates, it can be rotated synchronously through multiple sets of second pulleys 14 and the second transmission belt 15, thereby ensuring the drive of the lead frame, so that the lead frame moves in the electroplating water, thereby completing the electroplating work of the lead frame. In this process, multiple pieces of the same batch can be electroplated synchronously, thereby greatly improving the single processing volume, effectively solving the problem of insufficient production capacity caused by the limited number of fixtures in the traditional suspension process, and at the same time, because the insulating shaft 11 is forced to rotate synchronously through the transmission belt, it is ensured that all lead frames move at the same speed and posture, avoiding the problem of uneven plating thickness caused by swinging or position difference in the traditional suspension; After the driving assembly is working, the power cathode 31 is connected to the cathode of the power supply through an external power supply. At this time, the conductive roller 10 becomes a part of the cathode. The conductive roller 10 provides current to the lead frame through rolling contact with the lead frame, avoiding the problem of excessive single-point contact resistance of traditional hangers. At the same time, multi-point rolling contact can disperse the current and reduce local hot spots. During operation, it can effectively prevent the thin pins of the lead frame from being deformed due to current shock or clamping stress during the electroplating process. When the driving component continues to move, one end of the lead frame will slowly be transported out of the interior of the reaction chamber 1. At this time, the rotation speed of the first driving motor 7 can be increased or the current can be increased to make the coating composition, thickness or structure show continuous or gradient changes, thereby realizing gradient electroplating. When all the lead frames are output to the outside of the reaction chamber 1, the work is completed.

[0030] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A gradient electroplating processing device for a high heat dissipation copper alloy lead frame, comprising a reaction chamber (1), characterized in that: A connecting pipe (2) is fixedly connected to one side of the reaction chamber (1), and a conveying body (40) is fixedly connected to one side of the connecting pipe (2); A clean water tank (3) is provided on one side of the reaction chamber (1), and a cleaning component is provided on one side of the clean water tank (3); Two sets of mounting plates (9) are fixedly connected to the interior of the reaction chamber (1), and multiple sets of conductive rollers (10) are rotatably connected to the interior of the two sets of mounting plates (9). Insulating shafts (11) are fixedly sleeved inside the multiple sets of conductive rollers (10), and a driving assembly is provided on one side of the insulating shaft (11); The bottoms of the two groups of mounting plates (9) are fixedly connected to fixed base plates (29), and the bottoms of the fixed base plates (29) are provided with adjustment components; An ionization component is provided on one side of the mounting plate (9), and a guide component is provided in the middle of the two groups of mounting plates (9).

2. The gradient electroplating processing device for a high heat dissipation copper alloy lead frame according to claim 1, characterized in that: The cleaning assembly comprises a first water pipe (4), one end of the first water pipe (4) is fixedly connected to one side of the cleaning water tank (3), the other end of the first water pipe (4) is fixedly connected to a water pump (5), the top of the water pump (5) is fixedly connected to a second water pipe (6), the second water pipe (6) is fixedly connected to the reaction chamber (1), the reaction chamber (1) and the cleaning water tank (3) are connected via the first water pipe (4), the water pump (5) and the second water pipe (6), and one side of the reaction chamber (1) is fixedly connected to a water outlet (39).

3. The gradient electroplating processing device for a high heat dissipation copper alloy lead frame according to claim 2, characterized in that: The drive assembly comprises a first drive motor (7), the first drive motor (7) being arranged at one side of the reaction chamber (1), the output end of the first drive motor (7) being fixedly connected to a first rotating shaft (8), the outer sides of the first rotating shaft (8) and the insulating shaft (11) being fixedly connected to first pulleys (12), a first transmission belt (13) being sleeved between two groups of the first pulleys (12), the insulating shaft (11) and the first rotating shaft (8) being connected via the first pulley (12), so that the first drive motor (7) transmits the rotational motion via the first transmission belt (13) to rotate the insulating shaft (11).

4. The gradient electroplating processing device for a high heat dissipation copper alloy lead frame according to claim 3, characterized in that: The driving assembly further comprises a plurality of sets of second pulleys (14), each of the plurality of sets of second pulleys (14) being fixedly sleeved on the outer side of the insulating shaft (11), and a second transmission belt (15) being sleeved on the outer side of each two sets of the second pulleys (14), and the plurality of sets of insulating shafts (11) realizing multi-axis transmission through the second pulleys (14) and the second transmission belt (15), so that the plurality of sets of insulating shafts (11) can realize synchronous movement through the rotation of the first driving motor (7).

5. The gradient electroplating processing device for a high heat dissipation copper alloy lead frame according to claim 4, characterized in that: The adjustment assembly comprises a plurality of adjustment wheels (16), each of which is arranged in the middle of the two sets of mounting plates (9). The adjustment wheels (16) are arranged at the bottom of the conductive roller (10) and do not contact the conductive roller (10). A movable shaft (17) is fixedly sleeved inside the adjustment wheel (16), a fixed plate (18) is fixedly connected to one side of the movable shaft (17), and an adjustment column (23) is fixedly connected to the middle section of the bottom of the fixed plate (18).

6. The gradient electroplating processing device for a high heat dissipation copper alloy lead frame according to claim 5, characterized in that: The adjustment component also includes a second drive motor (19), which is arranged inside the reaction chamber (1). The bottom of the inner surface of the reaction chamber (1) is fixedly connected to a fixed block (20), and the second drive motor (19) is fixedly connected to one side of the fixed block (20). The output end of the second drive motor (19) is fixedly connected to one end of a second rotating shaft (21), and the second rotating shaft (21) is movably sleeved with the inside of the fixed block (20). The other end of the second rotating shaft (21) is fixedly connected to an eccentric wheel (22), and the eccentric wheel (22) is a concave circular ring structure.

7. The gradient electroplating processing device for a high heat dissipation copper alloy lead frame according to claim 6, characterized in that: The adjustment assembly also includes a sliding block (24), the sliding block (24) is fixedly connected to the bottom of the adjustment column (23), one side of the sliding block (24) is fixedly connected to one end of the connecting column (25), the other end of the connecting column (25) is fixedly connected to a pressure wheel (26), the outer surface of the pressure wheel (26) is in contact with the inner surface of the concave ring of the eccentric wheel (22), the top of the sliding block (24) is fixedly connected to one end of a spring (27), the other end of the spring (27) is fixedly connected to the fixed bottom plate (29), the spring (27) is movably sleeved on the outside of the adjustment column (23), one side of the interior of the sliding block (24) is movably sleeved on a limiting column (28), one end of the limiting column (28) is fixedly connected to the fixed bottom plate (29), and the other end of the limiting column (28) is fixedly connected to the reaction chamber (1).

8. The gradient electroplating processing device for a high heat dissipation copper alloy lead frame according to claim 7, characterized in that: The ionization component includes a connecting block (30), which is fixedly connected to one side of one of the mounting plates (9), and a power cathode (31) is fixedly connected to one side of the top of the connecting block (30). A connecting shaft (32) is fixedly connected to the inside of the connecting block (30), and the connecting shaft (32) is movably sleeved inside the conductive roller (10). The power cathode (31) is electrically connected to the power cathode (31) and the conductive roller (10). After the external power supply is started, the connecting shaft (32) and the power anode (34) are converted into connecting conductors through the power cathode (31), thereby conducting current to the lead frame to achieve indirect conduction. A first guide plate (35) is provided on the other side of the top of the connecting block (30), and the power cathode (31) and the first guide plate (35) are both fixedly connected to the reaction chamber (1). The first guide plate (35) does not contact the connecting block (30) and contacts with electroplating water during electroplating.

9. The gradient electroplating processing device for a high heat dissipation copper alloy lead frame according to claim 8, characterized in that: The guide assembly includes two groups of first guide plates (35), the first guide plates (35) are fixedly connected to the reaction chamber (1), the two groups of the first guide plates (35) are symmetrically arranged on both sides of the reaction chamber (1), a second guide plate (36) is arranged between the multiple groups of the adjusting wheels (16), the second guide plate (36) is fixedly connected to the mounting plate (9), both sides of the second guide plate (36) are inclined surfaces, the inclined surfaces match the bending arc of the adjusting wheel (16), the length of the second guide plate (36) is equal to that of the adjusting wheel (16) to facilitate guiding the electroplated lead frame, and a feed port (37) and a discharge port (38) are respectively opened on both sides of the reaction chamber (1), and the feed port (37) and the discharge port (38) are both arranged corresponding to the two groups of first guide plates (35).

10. A gradient electroplating processing system for a high heat dissipation copper alloy lead frame according to claims 1-9, characterized in that: The following steps are involved: S1, delivering the lead frame to be processed into the interior of the reaction chamber (1) through the feed port (37); S2. Start the second drive motor (19) to drive the second rotating shaft (21) to rotate. After the second rotating shaft (21) rotates, it drives the eccentric wheel (22) to rotate. After the eccentric wheel (22) rotates, due to its eccentric setting, the pressure wheel (26) inside the eccentric wheel (22) moves up and down, so that it can be adjusted according to the height size of the lead frame, so that it can adapt to lead frames of more sizes. At the same time, the presence of the spring (27) provides a pressure buffer for the lead frame, avoiding damage to the lead frame due to excessive pressure; S3. After the adjustment is completed, the first drive motor (7) is started to drive the first rotating shaft (8) to rotate. After the first rotating shaft (8) rotates, the insulating shaft (11) is driven to rotate through the first pulley (12) and the first transmission belt (13). After one of the insulating shafts (11) rotates, it can be synchronously rotated through multiple sets of second pulleys (14) and second transmission belts (15), thereby ensuring the drive of the lead frame and moving the lead frame in the electroplating water, thereby completing the electroplating work on the lead frame; S4. After the driving component is working, the power cathode (31) is connected to the cathode of the power supply through an external power supply. At this time, the conductive roller (10) becomes a part of the cathode. The conductive roller (10) provides current to the lead frame through rolling contact with the lead frame, thereby avoiding the problem of excessive single-point contact resistance of traditional hangers. At the same time, multi-point rolling contact can disperse the current and reduce local hot spots. S5. When the driving component continues to move, one end of the lead frame is slowly transported out of the interior of the reaction chamber (1). At this time, the composition, thickness or structure of the coating can be changed continuously or in a gradient manner by increasing the rotation speed of the first driving motor (7) or increasing the current, thereby achieving gradient electroplating; S6. When all the lead frames are output to the outside of the reaction chamber (1), the work is completed.

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