Cooling fin chemical nickel plating automatic welding production device

Abstract

The invention discloses a cooling fin chemical nickel plating automatic welding production device, and relates to the technical field of cooling fin welding. Comprising cooling fins, a feeding gripper, a discharging gripper, a rotating table and a welding machine, a plurality of positioning units are arranged on the rotating table in the circumferential direction, each positioning unit comprises a base and a lifting plate, a mounting groove is formed in the upper surface of each base, and a cooling air opening is formed in the inner side wall of each mounting groove; a positioning pin and a plurality of clamping blocks are fixedly arranged on the upper surface of the lifting plate, pressure sensors are embedded in the outer surfaces of the positioning pin and the clamping blocks, and an electromagnetic assembly is arranged in the positioning pin and used for controlling the diameter change of the positioning pin; the clamping block is connected with an adjusting assembly used for adjusting the position of the clamping block. The contact pressure of the cooling fin is detected in real time, self-adaptive clamping and positioning are achieved, and a chemical nickel plating layer is prevented from being scratched; the arranged cooling air openings blow air towards gaps of the fins, internal cooling media circulate, the temperature of a welding area is effectively reduced, and fin softening and substrate warping are restrained.

Description

Technical Field

[0001] This invention relates to the field of heat sink welding technology, and in particular to an automated welding production apparatus for electroless nickel plating of heat sinks. Background Technology

[0002] Automated welding of heat sinks typically involves a loading and unloading mechanism that transports the heat sink to a rotary table, which then conveys it to the welding station. After welding, the rotary table continues to rotate, and finally, an unloading and unloading mechanism moves the finished product to a conveyor belt. However, the localized high temperatures generated during welding cause uneven heating and expansion of the heat sink. The positioning mechanisms on the rotary table used to hold the heat sink are often rigid structures, locking the reference holes and positioning edges and restricting its free deformation. This constraint generates significant thermal stress within the heat sink, which is the root cause of product damage.

[0003] Therefore, existing devices have two major drawbacks: First, during and after welding, the heat sink fins undergo slight deformation due to temperature differences, and the fixed rigid positioning mechanism cannot adapt to this change. Because the thermal expansion and contraction are asynchronous, the gap may narrow under the high welding temperature, potentially squeezing the heat sink fins and causing scratches or even peeling of the electroless nickel plating layer on the surface, especially at the edges where deformation is concentrated. Second, existing loading and unloading mechanisms mostly use rigid mechanical claws for clamping. When the heat sink fins are still in a softened state after welding, this rigid clamping can easily cause plastic deformation of the fins, affecting product quality. Summary of the Invention

[0004] The purpose of this invention is to solve the problems mentioned in the background art by providing an automated welding production device for electroless nickel plating of heat sinks.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An automated welding production device for electroless nickel plating of heat sinks includes a heat sink, a feeding gripper, a discharging gripper, a rotary table, and a welding machine. The heat sink includes a substrate and fins. The substrate has reference holes. The feeding gripper, the discharging gripper, and the welding machine are arranged around the rotary table. Multiple positioning units are arranged around the rotary table. The positioning units are used to limit and fix the heat sink. The feeding gripper is used to transport the heat sink to the positioning unit. The welding machine is used to perform welding operations on the heat sink on the positioning unit. The discharging gripper is used to transport the welded heat sink to the next process. The positioning unit includes a base and a lifting plate. The base is fixedly installed on a rotating platform. The upper surface of the base is provided with a mounting groove. A lifting column is fixedly installed at the bottom of the mounting groove. The lifting plate is fixedly installed at the top of the lifting column. A cooling air vent is provided on the inner side wall of the mounting groove. The upper surface of the lifting plate is fixed with a positioning pin and a plurality of clamping blocks. The positioning pin is used to insert into the reference hole to position the heat sink. The plurality of clamping blocks are used to clamp the four sides of the substrate. Pressure sensors are embedded on the outer surfaces of the positioning pin and the clamping blocks. An electromagnetic component is provided inside the positioning pin to control the diameter change of the positioning pin. The clamping blocks are connected to an adjustment component to adjust the position of the clamping blocks.

[0006] As a further aspect of the present invention: the electromagnetic component includes a first spring and two first electromagnets. The first spring is laterally disposed inside the positioning pin, and the two ends of the first spring are respectively fixedly connected to the two first electromagnets. The two first electromagnets are respectively fixed to the inner walls on both sides of the lateral side inside the positioning pin.

[0007] As a further aspect of the present invention: two positioning pins are provided, and the two positioning pins are diagonally distributed and fixed to the upper surface of the lifting plate; The positioning pin is made of elastic material and is diamond-shaped. The outer walls on both sides of the positioning pin are used to fit against the inner wall of the reference hole, and the fitting part is treated with a smooth arc transition.

[0008] As a further embodiment of the present invention: four clamping blocks are provided, and a fixing block is fixedly provided on the upper surface of the lifting plate at the corresponding position of each clamping block. A cavity is opened inside the fixing block, and the adjustment component is disposed in the cavity. The adjustment assembly includes an adjustment cylinder, an adjustment rod, and two second electromagnets. The adjustment cylinder is fixedly installed inside the cavity; one of the two second electromagnets is fixedly installed inside the adjustment cylinder, and the other is slidably installed inside the adjustment cylinder. The two second electromagnets are connected by a second spring; One end of the adjusting rod extends through the side wall of the fixing block to the outside of the cavity and is fixedly connected to the clamping block. The other end of the adjusting rod is fixedly connected to the second electromagnet that is slidably installed.

[0009] As a further aspect of the present invention: the clamping block is a hollow cavity structure, the clamping block is hollow inside, and the two ends of the clamping block are respectively provided with a cooling medium input interface and a cooling medium output interface.

[0010] As a further aspect of the present invention: two sets of adjustment components are provided in each cavity, and the adjustment rods of the two sets of adjustment components are fixedly connected to both ends of the clamping block respectively; Each adjusting cylinder is provided with a connection port, which is connected to the adjusting rod at the corresponding position and the internal cavity of the clamping block through a flexible hose, serving as a cooling medium input interface and a cooling medium output interface.

[0011] As a further aspect of the present invention: the outlet direction of the cooling air vent is perpendicular to the fin gap of the heat sink. The base has an air outlet on the inner wall of the mounting groove opposite to the cooling air vent. The air outlet penetrates the side wall of the base and is equipped with an electrically controlled switch gate.

[0012] As a further aspect of the present invention: when the unloading gripper holds the heat sink, it avoids the area where the fins are located and only grips the side of the substrate.

[0013] Compared with existing technologies, the advantages of this invention are: 1. By using the electromagnetic component in the positioning pin and the adjustment component in the clamping block, the present invention achieves adaptive clamping and positioning of the heat sink. When the heat sink undergoes slight deformation due to welding heat, the pressure sensor detects the contact pressure in real time, the electromagnetic component controls the change in the diameter of the positioning pin (i.e., the change in the lateral dimension), and the adjustment component adjusts the position of the clamping block, thereby releasing thermal stress and preventing the electroless nickel plating layer from being scratched or peeled off due to rigid constraints, effectively protecting the surface quality of the product.

[0014] 2. The welded heat sink is cooled by blowing air into the gap between the fins through the cooling vents and circulating the cooling medium inside the clamping block, which reduces the temperature of the welding area, effectively suppresses the high-temperature softening of the fins and the warping deformation of the substrate, and avoids the problem of high-temperature plastic deformation of the fins caused by the subsequent material handling gripper.

[0015] 3. The material handling gripper avoids the fin area during handling, preventing rigid contact with the fins in a high-temperature softened state during handling, eliminating the risk of plastic deformation of the fins caused by clamping force, and ensuring the structural integrity and product consistency of the heat sink. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the feeding gripper and rotary table of the present invention; Figure 3 This is a schematic diagram of the structure of the rotary table of the present invention; Figure 4 This is a schematic diagram of the positioning unit when the lifting plate of the present invention is in the rising state; Figure 5 This is a schematic diagram of the positioning unit when the lifting plate of the present invention is in the descending state; Figure 6 This is a schematic diagram of the positioning unit of the present invention; Figure 7 This is a schematic diagram of the structure of the base of the present invention; Figure 8 This is a schematic diagram of the lifting plate of the present invention; Figure 9 This is a schematic diagram of the positioning pin of the present invention; Figure 10 This is a schematic diagram of the structure of the clamping block of the present invention; Figure 11 This is a schematic diagram of the internal structure of the clamping block of the present invention. Figure 1 ; Figure 12 This is a schematic diagram of the internal structure of the clamping block of the present invention. Figure 2 ; Figure 13 for Figure 12 A magnified schematic diagram of the structure at point A in the middle.

[0017] In the diagram: 1. Heat sink; 2. Substrate; 3. Fin; 4. Reference hole; 5. Loading gripper; 6. Unloading gripper; 7. Rotary table; 8. Welding machine; 9. Positioning unit; 10. Base; 11. Lifting plate; 12. Mounting slot; 13. Lifting column; 14. Cooling vent; 15. Positioning pin; 16. Clamping block; 18. Electromagnetic assembly; 19. First spring; 20. First electromagnet; 21. Adjustment assembly; 22. Adjustment cylinder; 23. Adjustment rod; 24. Second electromagnet; 25. Second spring; 26. Fixing block; 27. Cavity; 28. Connection port; 29. ​​Hose; 33. Air outlet; 34. Electrically controlled switch gate. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Reference Figures 1 to 13 An automated welding production device for electroless nickel plating of heat sinks mainly includes a heat sink 1, a feeding gripper 5, a discharging gripper 6, a rotary table 7, and a welding machine 8. The heat sink 1 is composed of a substrate 2 and fins 3. The substrate 2 is provided with reference holes 4 for precise positioning and subsequent installation and fixing. The feeding gripper 5, the discharging gripper 6, and the welding machine 8 are arranged around the rotary table 7 in a circumferential direction to form a continuous production process.

[0020] Multiple positioning units 9 are fixedly installed circumferentially on the upper surface of the rotary table 7. Each positioning unit 9 is used to limit and fix a heat sink 1. The loading gripper 5 transports the unwelded heat sink 1 to the positioning unit 9, the welding machine 8 performs welding operation on the fixed heat sink 1, and the unloading gripper 6 transports the welded heat sink 1 to the next process, thereby realizing automated continuous production.

[0021] The positioning unit 9 includes a base 10 and a lifting plate 11. The base 10 is fixedly mounted on the rotary table 7 by bolts or welding. The upper surface of the base 10 is provided with a mounting groove 12. A lifting column 13 is fixedly mounted at the bottom of the mounting groove 12. The lifting column 13 can be a cylinder or an electric push rod, and its top is fixedly connected to the lifting plate 11. The lifting plate 11 can move up and down under the drive of the lifting column 13. During welding operations, the lifting plate 11 is in an elevated state, exposing the heat sink 1 for easy operation by the welding machine 8. After welding is completed, the lifting plate 11 lowers the heat sink 1, so that the entire heat sink 1 is located inside the mounting groove 12.

[0022] Cooling vents 14 are provided on the inner wall of the mounting slot 12. The cooling vents 14 are connected to an external cooling system. When the heat sink 1 is lowered into the mounting slot 12 with the lifting plate 11, the position of the cooling vents 14 is exactly aligned with the gap of the fins 3 of the heat sink 1, so that cooling air can be blown to it efficiently. This design can quickly reduce the temperature of the heat sink after welding, suppress the high temperature softening of the fins, and reduce the risk of thermal deformation.

[0023] Reference Figures 4 to 9 Two positioning pins 15 and four clamping blocks 16 are fixedly installed on the upper surface of the lifting plate 11. The two positioning pins 15 are diagonally distributed and are used to insert into the reference hole 4 of the heat sink 1 to achieve precise positioning. The positioning pins 15 are made of elastic material and are diamond-shaped. The outer walls on both sides of the pins are smoothly rounded to the inner walls of the reference holes 4 to reduce scratches on the electroless nickel plating layer.

[0024] The positioning pin 15 contains an electromagnetic assembly 18, including a first spring 19 and two first electromagnets 20. The first spring 19 is laterally disposed inside the positioning pin 15, and its two ends are fixedly connected to the two first electromagnets 20 respectively. The two first electromagnets 20 are fixed to the inner walls on both sides of the lateral side inside the positioning pin 15. When the heat sink expands due to welding heat, the reference hole 4 may deform. The pressure sensor embedded on the outer surface of the positioning pin detects the pressure change and controls the energizing state and current of the first electromagnets 20. When energized, the first electromagnets 20 attract or repel each other, compressing or releasing the first spring 19, thereby adjusting the diameter (lateral dimension) of the positioning pin 15 to accommodate the deformation of the reference hole 4.

[0025] Reference Figures 4 to 13 Four clamping blocks 16 are used to clamp the four sides of the substrate 2. Each clamping block 16 is provided with a fixing block 26 at a corresponding position. The fixing block 26 is fixed to the upper surface of the lifting plate 11 by bolts or welding. The fixing block 26 has a cavity 27 inside, and an adjustment component 21 is arranged in the cavity 27. The adjustment component 21 includes an adjustment cylinder 22, an adjustment rod 23 and two second electromagnets 24.

[0026] The adjusting cylinder 22 is fixedly installed inside the cavity 27. One of the two second electromagnets 24 is fixedly installed inside the adjusting cylinder 22, and the other is slidably installed inside the adjusting cylinder 22. The two are connected by a second spring 25. One end of the adjusting rod 23 passes through the side wall of the fixed block 26 and is fixedly connected to the clamping block 16. The other end is fixed to the slidably installed second electromagnet 24. When the pressure sensor on the clamping block 16 detects an abnormal clamping force, the current of the second electromagnet 24 is adjusted to change its magnetic force, causing the slidably installed second electromagnet 24 to move. The position of the clamping block 16 is adjusted by the adjusting rod 23, thereby adapting to the thermal deformation of the substrate 2 and preventing damage caused by rigid clamping.

[0027] The clamping block 16 has a hollow cavity structure with a cooling medium input interface and an output interface at both ends for circulating cooling medium such as water or oil. Two sets of adjustment components 21 are installed in each cavity 27. The adjustment rods 23 of the two sets of adjustment components 21 are fixed to both ends of the clamping block 16 to provide uniform adjustment force. The adjustment cylinder 22 has a connection port 28, which communicates with the adjustment rods 23 and the internal cavity of the clamping block 16 via a flexible hose 29, forming a cooling medium channel. This channel facilitates heat exchange with the substrate 2 in contact with the clamping block 16, absorbing the welding heat from the substrate 2 and achieving direct cooling of the substrate 2.

[0028] The clamping block 16 rapidly reduces the temperature of the substrate 2 while providing stable clamping. Combined with the cooling vents 14 in the mounting groove 12, it cools the fins 3, forming an all-round cooling system that effectively suppresses high-temperature softening of the fins and warping deformation of the substrate, and shortens the cooling time.

[0029] Reference Figures 1 to 13 The cooling vent 14 is oriented perpendicularly to the gap between the fins 3 of the heat sink 1 to maximize cooling efficiency. The base 10 has an air outlet 33 on the inner wall of the mounting groove 12 opposite to the cooling vent 14. The air outlet 33 penetrates the side wall of the base 10 and is equipped with an electrically controlled switch gate 34. After welding, the lifting plate 11 descends, and the heat sink 1 enters the mounting groove 12. At this time, the electrically controlled switch gate 34 opens, and cooling air is blown in from the cooling vent 14, passes through the fin gaps, and is discharged from the air outlet 33, forming forced convection cooling to quickly reduce the temperature of the heat sink and prevent the fins from softening.

[0030] The unloading gripper 6 is designed to avoid the fin area 3 and only grip the side of the substrate 2. Because the fins 3 may still have residual heat after the heat sink has undergone initial cooling in the mounting slot 12, this gripping method avoids plastic deformation of the fins 3 during handling and ensures the structural integrity of the product.

[0031] The steps involved in this application are as follows: S1: The loading gripper 5 transports the unwelded heat sink 1 to the positioning unit 9 of the rotary table 7, and performs precise positioning by inserting the positioning pin 15 into the reference hole 4, and fixes the four sides of the substrate 2 by clamping the clamping block 16. S2: Rotate the rotary table 7 to move the fixed heat sink 1 to the position of the welding machine 8; S3: Welding machine 8 performs welding operation on heat sink 1, while positioning pin 15 and clamping block 16 are adjusted in real time according to thermal deformation to reduce damage to the electroless nickel plating layer. S4: After welding is completed, the lifting plate 11 descends under the drive of the lifting column 13, bringing the heat sink 1 into the mounting slot 12; S5: The cooling system is started, and the cooling air outlet 14 blows cooling air into the gap of the fin 3. At the same time, the cooling medium in the clamping block 16 circulates to exchange heat with the substrate 2, forming all-round cooling and inhibiting fin softening and substrate deformation. S6: The air outlet 33 on the other side of the mounting slot 12 opens, and the cooling air passes through the gap between the fins and is discharged, forming forced convection and accelerating the cooling of the heat sink. S7: The unloading gripper 6 avoids the area of ​​the fin 3, grips the side of the substrate 2, and transports the cooled heat sink 1 to the next process;

[0032] S8: Rotary table 7 continues to rotate, repeating the above steps to achieve automated continuous production.

[0033] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A fin electroless nickel plating automatic welding production device, comprising a fin (1), a feeding gripper (5), a discharging gripper (6), a rotating table (7) and a welding machine (8), characterized in that, The fin (1) includes a base plate (2) and a fin (3), the base plate (2) is provided with a reference hole (4), the upper feeding gripper (5), the lower feeding gripper (6) and the welding machine (8) are arranged around the rotating table (7), a plurality of positioning units (9) are arranged circumferentially on the rotating table (7), the positioning unit (9) is used for limiting and fixing the fin (1), the upper feeding gripper (5) is used for carrying the fin (1) to the positioning unit (9), the welding machine (8) is used for welding the fin (1) on the positioning unit (9), and the lower feeding gripper (6) is used for carrying the welded fin (1) to the next process; The positioning unit (9) includes a base (10) and a lifting plate (11), the base (10) is fixed on the rotating table (7), the upper surface of the base (10) is provided with a mounting groove (12), the inner side wall of the mounting groove (12) is provided with a cooling air port (14), the groove bottom of the mounting groove (12) is fixedly installed with a lifting column (13), and the lifting plate (11) is fixed at the top end of the lifting column (13); The upper surface of the lifting plate (11) is provided with a positioning pin (15) and a plurality of clamping blocks (16), the outer surfaces of the positioning pin (15) and the clamping blocks (16) are embedded with pressure sensors, the inside of the positioning pin (15) is provided with an electromagnetic assembly (18) for controlling the diameter change of the positioning pin (15), and the clamping blocks (16) are connected with an adjusting assembly (21) for adjusting the position of the clamping blocks (16).

2. The device according to claim 1, characterized in that, The electromagnetic assembly (18) includes a first spring (19) and two first electromagnets (20), the first spring (19) is horizontally arranged in the inside of the positioning pin (15), the two ends of the first spring (19) are fixedly connected with the two first electromagnets (20) respectively, and the two first electromagnets (20) are fixedly arranged on the inner walls of the two horizontal sides in the inside of the positioning pin (15).

3. The device according to claim 2, characterized in that, The positioning pin (15) is provided with two, and the two positioning pins (15) are diagonally arranged on the upper surface of the lifting plate (11), and the positioning pin (15) is used for being inserted into the reference hole (4) to realize the positioning of the fin (1); The positioning pin (15) is made of elastic material and has a whole rhombus shape, the outer walls of the two horizontal sides of the positioning pin (15) are used for being matched with the inner walls of the reference hole (4), and the matched part is treated by smooth circular arc transition.

4. The device according to claim 3, characterized in that, The clamping blocks (16) are provided with four, which are used for clamping the four edges of the base plate (2), the upper surface of the lifting plate (11) is fixedly provided with a fixed block (26) at the corresponding position of each clamping block (16), the inside of the fixed block (26) is provided with a cavity (27), and the adjusting assembly (21) is arranged in the cavity (27); The adjusting assembly (21) includes an adjusting cylinder (22), an adjusting rod (23) and two second electromagnets (24), and the adjusting cylinder (22) is fixedly installed in the cavity (27); One of the two second electromagnets (24) is fixedly installed in the adjusting cylinder (22), and the other is slidingly installed in the adjusting cylinder (22); Two second electromagnets (24) are connected by a second spring (25); one end of the adjusting rod (23) extends to the outside of the cavity (27) through the side wall of the fixed block (26) and is fixedly connected with the clamping block (16), and the other end of the adjusting rod (23) is fixedly connected with the second electromagnet (24) which is slidingly installed.

5. The device according to claim 4, characterized in that, The clamping block (16) is an internally hollow clamping block, and the clamping block (16) is internally hollow and is provided with a cooling medium input interface and a cooling medium output interface at two ends thereof.

6. The device according to claim 5, characterized in that, Two groups of adjusting assemblies (21) are arranged in each cavity (27), and the adjusting rods (23) of the two groups of adjusting assemblies (21) are fixedly connected with two ends of the clamping block (16) respectively; A connecting port (28) is arranged on each adjusting cylinder (22), the connecting port (28) is connected with the adjusting rod (23) at the corresponding position and the clamping block internal cavity of the clamping block (16) in communication through a hose (29), and serves as a cooling medium input interface and a cooling medium output interface.

7. The device according to claim 6, characterized in that, The direction of the air outlet (33) of the cooling air port (14) is vertically towards the fin (3) gap of the fin (3) of the heat dissipation fin (1); An air outlet (33) is formed in the inner wall on the other side of the mounting groove (12) opposite to the cooling air port (14) of the base (10), the air outlet (33) penetrates through the side wall of the base (10), and an electric control switch gate (34) is arranged at the air outlet (33).

8. The device according to claim 7, characterized in that, When the blanking gripper (6) clamps the heat dissipation fin (1), the fin (3) area is avoided, and only the side edge of the base plate (2) is gripped.

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