Automatic assembling equipment for field effect transistor heat dissipation assembly

Abstract

The application relates to the technical field of automatic assembly equipment, in particular to a field effect tube heat dissipation assembly automatic assembly equipment. The equipment comprises a machine table and a rotating disc intermittently rotatingly arranged on the machine table, a plurality of workpiece workstations for bearing workpieces to be processed are arranged around the periphery of the rotating disc; along the rotating direction of the rotating disc, the machine table is sequentially provided with a screw assembling assembly, a first bridge stack assembling assembly, a first point heat-conducting paste assembling assembly, a heat dissipation fin assembling assembly, a second point heat-conducting paste assembling assembly, a second bridge stack assembling assembly, a screw locking assembly, a floating height detection assembly, a green glue point assembling assembly and a blanking assembly. The application can continuously complete component assembly, gluing, locking, defect detection, protection gluing and finished product blanking, integrates multiple processes to realize full-automatic production, has high production efficiency, stable assembly quality and can be adapted to various specifications of materials.

Description

Technical Field

[0001] This application relates to the field of automated assembly equipment technology, and in particular to an automated assembly equipment for field-effect transistor heat dissipation components. Background Technology

[0002] Field-effect transistors (FETs) are widely used in various power electronic devices. To ensure their heat dissipation performance, they need to be assembled with heat dissipation components consisting of screws, rectifier bridges, heat sinks, and other parts. The complete assembly process of this heat dissipation component involves multiple interconnected steps, including component assembly, thermal paste application, screw and nut tightening, quality inspection, protective adhesive application, and finished product unloading. The industry has a high demand for the large-scale and standardized assembly of this component.

[0003] Currently, the assembly of the aforementioned heat dissipation components is mostly done manually in stages, or using multiple independent machines to complete a single process. Workpieces need to be manually transferred and connected between different processes and different machines, making it impossible to achieve fully automated, continuous production.

[0004] This work mode not only has low overall production efficiency and high labor costs, but also involves a lot of manual intervention, which can easily lead to inconsistent assembly precision in each process. It also makes it impossible to simultaneously complete the detection of locking defects and automatic unloading of finished products on the production line, making it difficult to meet the stable production requirements of large-volume products.

[0005] Therefore, based on the above problems, the existing technology needs to be improved. Summary of the Invention

[0006] The purpose of this application is to provide an automatic assembly device for field-effect transistor heat dissipation components.

[0007] The above-mentioned technical objective of this application is achieved through the following technical solution: an automatic assembly equipment for field-effect transistor heat dissipation components, comprising a machine base and a turntable intermittently rotating on the machine base, wherein the turntable is surrounded by multiple workpiece stations for carrying workpieces to be processed; along the rotation direction of the turntable, the machine base is sequentially arranged with a screw assembly, a first bridge rectifier assembly, a first thermal paste application assembly, a heat sink assembly, a second thermal paste application assembly, a second bridge rectifier assembly, a screw fastening assembly, a float detection assembly, a green glue application assembly, and a feeding assembly; the screw assembly is used for completing... The assembly consists of a screw pre-assembly, a first bridge rectifier assembly for assembling the first rectifier bridge rectifier onto the screw, a first thermal paste application assembly for applying thermal paste to the workpiece assembly joint, a heat sink assembly for assembling heat sinks, a second thermal paste application assembly for applying thermal paste to the workpiece a second time, a second bridge rectifier assembly for assembling the second rectifier bridge rectifier, a screw locking assembly for locking the screw and matching nut, a float detection assembly for detecting screw and nut locking float defects, a green adhesive application assembly for applying protective green adhesive to qualified workpieces, and a material unloading assembly for outputting the finished product.

[0008] By adopting the above technical solution, the workpiece is driven to complete all processing steps in sequence by the intermittent rotation of the turntable. Multiple processes such as parts assembly, thermal paste application, locking and fixing, defect detection, protective adhesive application, and finished product unloading are integrated into one machine, realizing full-process continuous automated production, reducing manual handling and operation, and effectively improving overall production efficiency.

[0009] Optionally, the screw assembly includes a screw vibration feeding mechanism, a screw distribution mechanism, and a screw gripping robot; the screw vibration feeding mechanism, the screw distribution mechanism, and the screw gripping robot are sequentially connected and cooperated along the material conveying direction; the screw vibration feeding mechanism is provided with a detachable disc and inserts, which can be adapted to flat head screws and round head screws.

[0010] By adopting the above technical solutions, the automated feeding, sorting, gripping and assembly of screws can be realized, and the process connection is smooth; the detachable disc and inserts can be adapted to different types of screws, improving the material compatibility of the equipment.

[0011] Optionally, the first group of bridge rectifier components includes a bridge rectifier placement tray, a bridge rectifier discharge mechanism, a bridge rectifier shaping and shearing mechanism, and a bridge rectifier pick-and-place robot; the bridge rectifier placement tray, the bridge rectifier discharge mechanism, and the bridge rectifier shaping and shearing mechanism are arranged sequentially along the material conveying direction, and the bridge rectifier pick-and-place robot is connected to the material output end; the bridge rectifier shaping and shearing mechanism can switch between three working modes through a program: no processing of rectifier bridge rectifier pins, pin shaping, and pin shearing.

[0012] By adopting the above technical solutions, the rectifier bridge rectifier can be automated in terms of material storage, conveying and assembly. At the same time, the pin processing mode can be flexibly switched according to production needs to adapt to the processing requirements of different product specifications.

[0013] Optionally, the first thermal paste assembly includes a glue tank, a pressure regulating valve, a back-suction dispensing valve, a special dispensing needle, and a low-glue sensor. The pressure regulating valve and the back-suction dispensing valve are respectively connected to the glue tank pipeline. The special dispensing needle is connected to the discharge end of the back-suction dispensing valve. The low-glue sensor cooperates with the magnetic ring inside the glue tank. The pressure regulating valve has a pressure adjustment range of 0.1MPa to 0.2MPa. The back-suction dispensing valve has a glue back-suction structure. The special dispensing needle is a multi-needle combination structure, with multiple dispensing needles arranged in a preset array, and the dispensing areas corresponding to each dispensing needle are spliced ​​together.

[0014] By adopting the above technical solutions, the dispensing pressure and amount of thermal paste can be precisely adjusted; the back suction structure can prevent the paste from dripping and the needle from clogging; the multi-needle array dispensing needle can achieve uniform coating over a large area; and the low-paste sensor can monitor the remaining material in real time, ensuring continuous and stable production.

[0015] Optionally, the heat sink assembly includes a heat sink vibration feeding mechanism, a heat sink direct vibration feeding mechanism, a heat sink sorting mechanism, and a heat sink picking and placing robot; the heat sink vibration feeding mechanism, the heat sink direct vibration feeding mechanism, the heat sink sorting mechanism, and the heat sink picking and placing robot are connected sequentially along the material conveying direction.

[0016] By adopting the above technical solutions, the automated feeding, sorting, and gripping assembly of heat sinks are achieved, ensuring smooth and orderly material transport and continuous operation of the heat sink assembly process.

[0017] Optionally, the component composition, arrangement and mating structure of the second thermal paste assembly are the same as those of the first thermal paste assembly.

[0018] By adopting the above technical solution, the two sets of thermal paste coating structures have uniform specifications and consistent coating performance, which not only facilitates equipment debugging and daily maintenance, but also ensures that the process standards for the two coating processes are consistent.

[0019] Optionally, the component composition, arrangement and mating structure of the second group of bridge rectifier assemblies are consistent with those of the first group of bridge rectifier assemblies.

[0020] By adopting the above technical solutions, the assembly structure of the two sets of rectifier bridge rectifiers is standardized, reducing the difficulty of equipment debugging, while ensuring that the assembly accuracy and quality of the two bridge rectifiers remain consistent.

[0021] Optionally, the screw fastening assembly includes a nut vibration feeding mechanism, a positioning cylinder, a nut picking mechanism, and an electric fastening mechanism; the nut vibration feeding mechanism is connected to the nut picking mechanism, and the positioning cylinder is set at the workpiece station.

[0022] By adopting the above technical solution, the nut feeding is automated, the workpiece is precisely positioned by the positioning cylinder, and the screw and nut are automatically locked by the electric locking mechanism. The locking operation is stable and highly accurate.

[0023] Optionally, the buoyancy detection component includes a guide rail assembly and a buoyancy sensor, the buoyancy sensor being mounted on the guide rail assembly and having an adjustable position; the green glue application component includes a dispensing controller, a quick-change green glue head, a pressure regulating module, a vacuum regulating valve, and a vacuum display; the buoyancy detection component and the green glue application component are electrically linked.

[0024] By adopting the above technical solutions, the detection position can be flexibly adjusted according to product specifications to accurately detect defects such as screw and nut locking and floating. The detection mechanism and the dispensing mechanism are linked, and only qualified products are coated with green glue, automatically distinguishing defective products. The green glue back suction and quick-change glue head structure also improve the stability and maintenance convenience of the dispensing process.

[0025] Optionally, the feeding assembly is provided with an empty tray splitting mechanism, a finished product tray placement mechanism, and a full tray stacking mechanism in sequence along the workpiece flow direction; the empty tray splitting mechanism is used to complete the splitting and supply of empty trays, the finished product tray placement mechanism is used to grab finished products and classify them into good and bad products for tray placement, and the full tray stacking mechanism is used to stack and store trays full of finished products.

[0026] By adopting the above technical solutions, the automatic supply of empty pallets, the sorting and traying of finished products, and the automatic stacking of full pallets can be realized, thus completing the fully automated storage of finished products and further reducing manual intervention.

[0027] In summary, this application has at least the following beneficial effect: 1. Relying on the intermittent rotation of the turntable to drive the workpiece to complete all processing steps in sequence, multiple processes such as parts assembly, thermal paste application, locking and fixing, defect detection, protective adhesive application, and finished product unloading are integrated into one machine to achieve fully automated production, reduce manual handling and operation, and effectively improve overall production efficiency.

[0028] 2. Enables automatic supply of empty pallets, sorting and plating of finished products, and automatic stacking of full pallets, achieving fully automated storage of finished products and further reducing manual intervention. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of an automated assembly equipment for field-effect transistor heat dissipation components; Figure 2This is a structural diagram of a screw assembly; Figure 3 This is a schematic diagram of the structure of the first bridge rectifier assembly; Figure 4 This is a schematic diagram of the structure of the first thermal paste assembly; Figure 5 This is a schematic diagram of a heat sink assembly. Figure 6 This is a structural diagram of the screw fastening assembly; Figure 7 Schematic diagram of the buoyancy detection component; Figure 8 This is a structural diagram of the green adhesive component; Figure 9 This is a structural diagram of the feeding assembly.

[0030] Reference numerals: 1. Machine base; 2. Turntable; 3. Workpiece station; 4. Screw assembly; 41. Screw vibration feeding mechanism; 42. Screw sorting mechanism; 43. Screw gripping robot; 5. First bridge rectifier assembly; 51. Bridge rectifier placement tray; 52. Bridge rectifier discharge mechanism; 53. Bridge rectifier shaping and trimming mechanism; 54. Bridge rectifier picking and placing robot; 6. First thermal paste assembly; 61. Glue bucket; 62. Special dispensing needle; 7. Heat sink assembly; 71. Heat sink vibration feeding mechanism; 72. Heat sink direct vibration feeding mechanism; 73. Heat sink sorting machine Structure; 74. Heat sink handling robot; 8. Second thermal paste assembly; 9. Second bridge rectifier assembly; 10. Screw fastening assembly; 101. Nut vibration feeding mechanism; 102. Positioning cylinder; 103. Electric locking mechanism; 11. Buoyancy detection assembly; 111. Guide rail assembly; 112. Buoyancy sensor; 12. Green glue dispensing assembly; 121. Dispensing controller; 122. Green glue quick-change head; 123. Vacuum display; 13. Unloading assembly; 131. Empty tray sorting mechanism; 132. Finished product tray stacking mechanism; 133. Full tray stacking mechanism. Detailed Implementation

[0031] In this embodiment, refer to Figures 1-9This automatic assembly equipment for field-effect transistor heat dissipation components consists of a machine platform 1, above which is a turntable 2 that rotates intermittently. The turntable 2 is powered by a cam divider to achieve precise intermittent operation. Multiple workpiece stations 3 are arranged around the outer perimeter of the turntable 2, each equipped with a universal fixture to stably support workpieces of different specifications. Along the rotation direction of the turntable 2, the surface of the machine platform 1 is sequentially arranged with a screw assembly 4, a first bridge rectifier assembly 5, a first thermal paste application assembly 6, a heat sink assembly 7, a second thermal paste application assembly 8, a second bridge rectifier assembly 9, a screw fastening assembly 10, a height detection assembly 11, a green adhesive application assembly 12, and a feeding assembly 13. Each time the turntable 2 completes one intermittent rotation, all workpiece stations 3 move synchronously by one station spacing, allowing the workpieces to enter the respective functional components sequentially according to the preset process, completing continuous processing.

[0032] Before the equipment is put into operation, staff check the air and power supply and adjust the operating parameters of each component according to the products to be produced. After the equipment is started, the cam divider drives the turntable 2 to rotate periodically. The workpiece to be processed is placed on the workpiece station 3 of the turntable 2 and flows to each processing station in sequence with the turntable 2. The workpiece first completes the screw pre-installation, then completes the first rectifier bridge assembly, the first thermal paste application, the heat sink assembly, the second thermal paste application, and the second rectifier bridge assembly in sequence. After screw and nut tightening, locking and floating defect detection, and qualified workpiece protective green glue coating, the workpiece is finally transferred to the unloading area to complete the empty tray supply, finished product sorting and tray stacking, and full tray stacking. The entire processing flow is seamless and connected. The workpiece is automatically transferred by the turntable 2 throughout the process, without the need for manual handling between processes, realizing fully automated production of MOSFET heat dissipation components from component assembly to finished product output.

[0033] The screw assembly 4 is arranged along the material conveying direction as follows: a screw vibrating feeding mechanism 41, a screw sorting mechanism 42, and a screw gripping robot 43, all tightly connected. The screw vibrating feeding mechanism 41 is a disc-type vibrating feeding structure that uses high-frequency vibration to organize messy screws into a uniform shape and convey them forward in an orderly manner. This mechanism is equipped with a detachable disc and inserts, allowing operators to quickly change parts according to production needs. It is suitable for feeding both flat-head and round-head screws and is compatible with M3 screws with lengths ranging from 8mm to 16mm. The screw sorting mechanism 42 has built-in limit separators that can isolate continuously conveyed screws one by one, achieving precise positioning of individual screws. The screw gripping robot 43 is a multi-axis pneumatic gripping structure that can precisely move and clamp materials. During the operation, the disorderly stacked screws are sorted and orderly fed out by the screw vibration feeding mechanism 41, and then the screw sorting mechanism 42 completes the sorting and positioning of individual screws. Finally, the screw gripping robot 43 transfers the sorted screws to the workpiece station 3 of the turntable 2 to complete the screw pre-assembly process.

[0034] The first group of bridge rectifier components 5 is arranged sequentially along the material conveying direction, including a bridge rectifier placement tray 51, a bridge rectifier discharge mechanism 52, and a bridge rectifier shaping and shearing mechanism 53. The material output end connects to a bridge rectifier handling robot 54. A tool guide post is also installed along the material conveying path to guide and limit the rectifier bridge rectifier. The bridge rectifier placement tray 51 is a large-capacity layered storage structure that can neatly place rectifier bridge rectifiers, storing up to 12 rectifier bridge rectifiers simultaneously, reducing frequent material replenishment operations during production. The bridge rectifier discharge mechanism 52 adopts a linear feeding structure for stable material conveying. The bridge rectifier shaping and shearing mechanism 53 integrates a pin shaping module and a shearing module, and can switch working states according to program instructions. It can switch between three working modes via the equipment program, corresponding to three processing techniques: no pin processing, pin shaping, and pin shearing. The tool guide post is a smooth cylindrical guide that restricts the bridge rectifier conveying trajectory and prevents material deviation. The bridge rectifier handling robot 54 is a pneumatic clamping structure, offering flexible movement and high positioning accuracy. After the rectifier bridge stack is sent out from the bridge stack placement tray 51, it is conveyed by the bridge stack unloading mechanism 52, and the pin processing is completed in the bridge stack shaping and shearing mechanism 53. Then, the bridge stack picking and placing robot 54 grabs the rectifier bridge stack and accurately assembles it into the pre-installed screw position on the workpiece station 3.

[0035] The first thermal paste assembly 6 includes a glue tank 61, a pressure regulating valve, a back-suction dispensing valve, a specially designed dispensing needle 62, and a low-glue sensor. The pressure regulating valve and the back-suction dispensing valve are connected to the glue tank 61 via pipelines. The specially designed dispensing needle 62 is connected to the discharge end of the back-suction dispensing valve. The low-glue sensor works in conjunction with a magnetic ring inside the glue tank 61. The glue tank 61 is a sealed, pressure-resistant storage cylinder used to store thermal paste in a sealed manner. The pressure regulating valve is a pneumatic pressure regulating valve that can precisely adjust the air pressure inside the pipeline. The operator sets the pressure range to 0.1MPa to 0.2MPa to precisely control the amount of thermal paste dispensed by adjusting the air pressure. The back-suction dispensing valve integrates a back-suction piston structure. After the glue is applied, negative pressure is used to draw the residual glue back into the valve body. After each glue application, the back-suction dispensing valve performs a glue back-suction action, effectively preventing thermal paste dripping and needle clogging. The specially designed dispensing needle 62 is an integrated multi-needle module, which fixes multiple dispensing needles in an array. Using a multi-needle combination, the dispensing needles are arranged in an array according to the workpiece's dispensing area, and the dispensing ranges of each needle are interlocked to ensure uniform coating of thermal paste over a large area. The low-paste sensor is a photoelectric sensing component that, in conjunction with the magnetic ring inside the glue tank 61, monitors the material level in real time. When the thermal paste in the glue tank 61 is insufficient, the low-paste sensor will trigger an early warning, reminding workers to replenish the material in time to ensure uninterrupted production.

[0036] The heat sink assembly 7 consists of a heat sink vibration feeding mechanism 71, a heat sink direct vibration feeding mechanism 72, a heat sink sorting mechanism 73, and a heat sink picking and placing robot 74. All mechanisms are connected sequentially along the material conveying direction. The heat sink vibration feeding mechanism 71 uses vibration to sort and discharge heat sinks. A frequency controller can adjust the vibration frequency to change the discharge speed. A noise-reducing top cover is installed on top of the mechanism to reduce the noise generated during equipment operation. The heat sink direct vibration feeding mechanism 72 is a linear vibration conveying structure that conveys materials at a low amplitude and uniform speed to ensure smooth heat sink conveying. The heat sink sorting mechanism 73 is equipped with elastic limit blocks to achieve individual heat sink separation and positioning. The heat sink picking and placing robot 74 adopts a pneumatic gripper structure to grab and transfer heat sinks. This assembly is compatible with heat sinks with widths of 22mm and 25mm and lengths of 33mm to 40mm. During operation, the heat sinks are initially sorted and discharged by the heat sink vibration feeding mechanism 71, and then smoothly transported to the rear end by the heat sink direct vibration feeding mechanism 72. The heat sink sorting mechanism 73 separates the heat sinks into individual pieces, and finally the heat sink picking and placing robot 74 picks up the separated heat sinks and assembles them into the corresponding positions of the workpiece.

[0037] The components, piping connections, component arrangement, and overall working principle of the second thermal paste assembly 8 are completely identical to those of the first thermal paste assembly 6. The internal components, including the glue container 61, pressure regulating valve, back-suction dispensing valve, special dispensing needle 62, and low-glue sensor, also share the same structure and operation as their counterparts in the first thermal paste assembly 6. Both sets of thermal paste coating assemblies employ a standardized design, ensuring consistent process parameters and coating effects for both thermal paste applications on the workpiece. This also reduces the difficulty of equipment debugging, spare parts replacement, and routine maintenance. After the heat sink assembly is completed, the workpiece is transferred to this station via turntable 2 to complete the second thermal paste coating operation.

[0038] The overall structure, component arrangement, and working mode of the second bridge rectifier assembly 9 are the same as those of the first bridge rectifier assembly 5. The internal bridge rectifier placement tray 51, bridge rectifier discharge mechanism 52, bridge rectifier shaping and shearing mechanism 53, bridge rectifier handling robot 54, and tool guide post also have completely identical structures and working logic. After the workpiece completes the second thermal paste application, it enters this station, where the second bridge rectifier assembly 9 completes the conveying, pin processing, and assembly of the second rectifier bridge. The unified structure of the two bridge rectifier assembly mechanisms ensures consistent assembly accuracy and quality for both rectifier bridges.

[0039] The screw fastening assembly 10 includes a nut vibratory feeding mechanism 101, a positioning cylinder 102, a nut picking mechanism, and an electric fastening mechanism 103. The discharge end of the nut vibratory feeding mechanism 101 is connected to the nut picking mechanism, and the positioning cylinder 102 is positioned directly opposite the workpiece station 3 on the turntable 2. The nut vibratory feeding mechanism 101 is a vibration sorting structure that enables orderly nut discharge, and can discharge ordinary M3 nuts and M3 nuts with anti-loosening washers in an orderly manner. The positioning cylinder 102 is a linear clamping cylinder that can rigidly position the workpiece after extension to prevent workpiece displacement during operation. The nut picking mechanism is a small pneumatic gripper responsible for gripping and transferring the nut. The electric fastening mechanism 103 is equipped with an adjustable torque electric screwdriver bit, which can set the fastening torque according to process requirements to complete the screw and nut fastening operation. When the assembled workpiece is transferred to this station, the positioning cylinder 102 first extends to clamp and position the workpiece to prevent it from shifting during the locking process; then the nut picking mechanism grabs the nut and places it in the preset position on the workpiece, and finally the electric locking mechanism 103 moves down to complete the locking and fixing operation of the screw and nut.

[0040] The buoyancy detection component 11 consists of a guide rail assembly 111 and a buoyancy sensor 112, which can slide along the guide rail assembly 111. The guide rail assembly 111 is a linear slide rail structure, providing a smooth movement trajectory for the sensor, allowing operators to adjust the sensor's installation position according to the specifications of different products. The buoyancy sensor 112 is a high-precision displacement detection sensor that collects locking position data in real time, accurately detecting defects such as buoyancy or incomplete locking after screws and nuts are locked. The green glue dispensing component 12 is equipped with a dispensing controller 121, a quick-change green glue head 122, a pressure regulating module, a vacuum regulating valve, and a vacuum display 123. The dispensing controller 121 is a programmable electronic control module that uniformly manages parameters such as dispensing time and glue volume. The vacuum regulating valve is a negative pressure regulating valve body used to regulate the magnitude of the back suction negative pressure. The quick-change green glue head 122 is a pluggable detachable structure for easy disassembly and assembly. The buoyancy detection component 11 and the green glue dispensing component 12 are electrically linked. When the buoyancy detection component 11 determines that the workpiece is properly locked, it sends a start signal to the green glue application component 12, and the equipment performs the green glue coating process. If the detection determines that the workpiece is defective, the green glue application component 12 remains in standby mode and does not perform the glue application action. The green glue application component 12 relies on a vacuum regulating valve to adjust the back suction pressure to prevent green glue from dripping. The green glue nozzle has a detachable quick-change structure, which can be quickly replaced when blockage occurs, making maintenance convenient.

[0041] The unloading assembly 13 is sequentially equipped with an empty tray splitting mechanism 131, a finished product tray placement mechanism 132, and a full tray stacking mechanism 133 along the workpiece flow direction. These mechanisms are connected by conveyor belts and are equipped with custom-designed pallets to support the trays, improving the stability of the tray structure. The empty tray splitting mechanism 131 is equipped with a cylinder-driven inserter, which is a rigid pneumatic insert plate that extends and retracts laterally using cylinder power to separate the stacked trays. After the stacked empty trays are transported to this station, the cylinder-driven inserter actuates, separating the stacked empty trays one by one. The separated empty trays are placed on the custom-designed pallet and then transported backward by the conveyor belt to the tray placement area. The finished product tray placement mechanism 132 uses an XYZ three-axis module combined with a tray suction cup. The XYZ three-axis module is composed of three linear modules, enabling three-dimensional movement within space. The tray suction cup is a vacuum adsorption structure that uses negative pressure to adsorb finished workpieces. The three-axis module can reciprocate between the workpiece station 3 and the tray placement area. The suction cup grabs the finished products on the turntable 2 and, based on the previous inspection results, classifies good and defective products and places them in the tray. When the tray is full of finished products, the conveyor belt transports the full-load tray along with the customized pallet to the full-tray stacking area. The stacking station is equipped with a lifting mechanism, guide groove, and buckle. The lifting mechanism is a vertical lifting cylinder that drives the tray to move up and down in a linear motion. The guide groove is a limiting groove that limits the stacking trajectory of the tray. The buckle is an elastic claw structure that can elastically extend and retract to support the tray. Once the full-loaded tray is in place, the lifting mechanism extends upwards, pushing the tray and pallet together into the guide groove. The lifting mechanism then returns to its original position, and the latches on both sides of the guide groove extend simultaneously to hold the tray and pallet in place. Subsequent full-loaded trays repeat the above actions sequentially, gradually completing multi-layer full-tray stacking, ultimately achieving fully automated unloading and storage of finished products.

[0042] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An automatic assembly device for a field-effect transistor heat dissipation assembly, characterized in that, The system includes a machine base (1) and a turntable (2) intermittently rotating on the machine base (1). The turntable (2) is surrounded by multiple workpiece stations (3) for carrying the workpieces to be processed. Along the rotation direction of the turntable (2), the machine base (1) is arranged in sequence with a screw assembly (4), a first bridge rectifier assembly (5), a first point thermal paste assembly (6), a heat sink assembly (7), a second point thermal paste assembly (8), a second bridge rectifier assembly (9), a screw fastening assembly (10), a float detection assembly (11), a green glue assembly (12), and a feeding assembly (13). The screw assembly (4) is used to complete the pre-installation of screws. The first bridge rectifier assembly (5) is used to assemble the first rectifier bridge rectifier onto the screw. The first point thermal paste assembly (6) is used to apply thermal paste to the workpiece assembly joint. The heat sink assembly (7) is used to assemble the heat sink. The second point thermal paste assembly (8) is used to apply thermal paste to the workpiece a second time. The second bridge rectifier assembly (9) is used to assemble the second rectifier bridge rectifier. The screw locking assembly (10) is used to lock the screw and the matching nut. The float detection assembly (11) is used to detect the locking float defects of the screw and nut. The green glue assembly (12) is used to apply protective green glue to qualified workpieces. The unloading assembly (13) is used to output the finished product after processing.

2. The automatic assembly equipment for field-effect transistor heat dissipation components according to claim 1, characterized in that, The screw assembly (4) includes a screw vibration feeding mechanism (41), a screw distribution mechanism (42), and a screw gripping robot (43); the screw vibration feeding mechanism (41), the screw distribution mechanism (42), and the screw gripping robot (43) are connected and cooperated in sequence along the material conveying direction; the screw vibration feeding mechanism (41) is provided with a detachable disc and inserts, which can be adapted to flat head screws and round head screws.

3. The automatic assembly equipment for field-effect transistor heat dissipation components according to claim 1, characterized in that, The first bridge rectifier assembly (5) includes a bridge rectifier placement tray (51), a bridge rectifier discharge mechanism (52), a bridge rectifier shaping and shearing mechanism (53), and a bridge rectifier pick-and-place robot (54). The bridge rectifier placement tray (51), the bridge rectifier discharge mechanism (52), and the bridge rectifier shaping and shearing mechanism (53) are arranged sequentially along the material conveying direction. The bridge rectifier pick-and-place robot (54) docks with the material output end. The bridge rectifier shaping and shearing mechanism (53) can switch between three working modes: no processing of rectifier bridge rectifier pins, pin shaping, and pin shearing, through program switching.

4. The automatic assembly equipment for field-effect transistor heat dissipation components according to claim 1, characterized in that, The first point thermal paste assembly (6) includes a glue tank (61), a pressure regulating valve, a back-suction dispensing valve, a special dispensing needle (62), and a low glue sensing sensor; the pressure regulating valve and the back-suction dispensing valve are respectively connected to the glue tank (61) pipeline, the special dispensing needle (62) is connected to the discharge end of the back-suction dispensing valve, and the low glue sensing sensor is matched with the magnetic ring inside the glue tank (61); the pressure regulating valve has a pressure range of 0.1MPa~0.2MPa, the back-suction dispensing valve has a glue back-suction structure, and the special dispensing needle (62) is a multi-needle combination structure, with multiple dispensing needles arranged in a preset array, and the dispensing areas corresponding to each dispensing needle are spliced ​​together.

5. The automatic assembly equipment for field-effect transistor heat dissipation components according to claim 1, characterized in that, The heat sink assembly (7) includes a heat sink vibration feeding mechanism (71), a heat sink direct vibration feeding mechanism (72), a heat sink distribution mechanism (73), and a heat sink picking and placing robot (74); the heat sink vibration feeding mechanism (71), the heat sink direct vibration feeding mechanism (72), the heat sink distribution mechanism (73), and the heat sink picking and placing robot (74) are connected sequentially along the material conveying direction.

6. The automatic assembly equipment for field-effect transistor heat dissipation components according to claim 1, characterized in that, The components, arrangement and mating structure of the second point thermal paste assembly (8) are consistent with those of the first point thermal paste assembly (6).

7. The automatic assembly equipment for field-effect transistor heat dissipation components according to claim 1, characterized in that, The components, arrangement and mating structure of the second bridge rectifier assembly (9) are consistent with those of the first bridge rectifier assembly (5).

8. The automatic assembly equipment for field-effect transistor heat dissipation components according to claim 1, characterized in that, The screw fastening assembly (10) includes a nut vibration feeding mechanism (101), a positioning cylinder (102), a nut picking mechanism, and an electric fastening mechanism (103); the nut vibration feeding mechanism (101) is connected to the nut picking mechanism, and the positioning cylinder (102) is set to correspond to the workpiece station (3).

9. The automatic assembly equipment for field-effect transistor heat dissipation components according to claim 1, characterized in that, The buoyancy detection component (11) includes a guide rail assembly (111) and a buoyancy sensor (112). The buoyancy sensor (112) is mounted on the guide rail assembly (111) and its position is adjustable. The green glue dispensing component (12) includes a dispensing controller (121), a green glue quick-change head (122), a pressure regulating module, a vacuum regulating valve, and a vacuum display (123). The buoyancy detection component (11) and the green glue dispensing component (12) are electrically linked.

10. The automatic assembly equipment for field-effect transistor heat dissipation components according to claim 1, characterized in that, The feeding assembly (13) is provided with an empty tray splitting mechanism (131), a finished product tray placement mechanism (132), and a full tray stacking mechanism (133) in sequence along the workpiece flow direction; the empty tray splitting mechanism (131) is used to complete the splitting and supply of empty trays, the finished product tray placement mechanism (132) is used to grab finished products and classify them into good and bad products for tray placement, and the full tray stacking mechanism (133) is used to stack and store trays full of finished products.

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