A welding device for processing and producing LED filament lamp driver boards.

Abstract

This invention relates to the field of welding equipment technology, specifically a welding device for processing and producing LED filament driver boards. It includes a base, on which, in a counter-clockwise direction, are sequentially arranged loading / unloading stations, a welding station, a cooling station, and a composite inspection station. It also includes an indexing frame with four carriers mounted on it. Each carrier has a workpiece holding and inspection mechanism, which includes a vibrating support slidably connected to the carrier, a bidirectional lead screw rotatably connected to the carrier, an inner shaft, and a convex shaft. An outer shaft is rotatably sleeved on the inner shaft. The beneficial effects of this invention are: by sequentially integrating the loading / unloading stations, welding station, cooling station, and composite inspection station in a counter-clockwise direction on the base, and by using the indexing frame to drive the four carriers to rotate intermittently by 90°, each LED filament driver board automatically enters the composite inspection station after laser welding and forced cooling.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, specifically to a welding device for processing and producing LED filament lamp driver boards. Background Technology

[0002] As the core control component of LED lighting fixtures, the soldering quality of components such as power pins on the LED driver board directly determines the product's performance and lifespan. Currently, soldering devices for LED driver boards have seen some development. For example, Chinese patent CN120395278A discloses a soldering device for LED driver board components. This device uses a board mounting unit, four clamping rods to hold the driver board from the side, and elastic blocks to secure it from the top, improving the board's mounting tightness. Simultaneously, the device is equipped with a soldering drive unit, which uses a ball screw, a traveling carriage, and a motor to move and rotate the soldering torch in the horizontal plane, enabling flexible soldering of components at different positions on the driver board. Furthermore, the device includes a gas extraction unit to absorb the fumes generated during soldering, improving the working environment. However, analysis reveals that this existing technology still has several technical shortcomings, as follows: Existing devices can only perform welding operations and do not integrate any unit for real-time, quantitative detection of welding results. After welding, the welding quality of the driver board, such as welding strength, conductivity, and appearance defects, usually requires manual visual inspection or offline inspection equipment for sampling. This method is inefficient, prone to human error, and cannot achieve 100% full inspection. This can lead to defective products flowing into the next process, seriously affecting the overall reliability and production yield of the product. More importantly, existing technology completely lacks the ability to test the mechanical strength of the solder joints. For key components such as power pins of LED driver boards, their solder joints not only need to be electrically conductive but also need to withstand a certain amount of mechanical stress. Existing devices cannot apply controllable, multi-dimensional mechanical loads to the solder joints after welding to assess their strength, thus failing to effectively prevent serious quality problems such as pin detachment caused by poor welding. Based on this, the present invention provides a welding device for processing and producing LED filament lamp driver boards to solve the problems mentioned in the background art. Summary of the Invention

[0003] This invention addresses the technical problems existing in the prior art by providing a welding device for processing and producing LED filament lamp driver boards. This solves the problem of the lack of welding quality inspection methods in existing welding devices, especially the lack of automated online detection function for welding strength.

[0004] The technical solution of this invention to solve the above-mentioned technical problems is as follows: A welding device for processing and producing LED filament lamp driver boards includes a base, on which, in a counterclockwise direction, are sequentially arranged a loading and unloading station, a welding station, a cooling station, and a composite inspection station, and further includes: The indexing frame has four carriers installed on it, and each carrier is equipped with a workpiece holding and inspection mechanism. The workpiece holding and inspection mechanism includes a workpiece vibrating seat slidably connected to a carrier, a bidirectional lead screw rotatably connected to the carrier, an inner shaft, and a cam shaft. An outer shaft is rotatably sleeved on the inner shaft. The top surface of the workpiece vibrating seat has a code slot and a power supply slot is fixedly installed. Vacuum suction holes are arrayed in the code slot. A reciprocating pressure plate and a lead pull plate are slidably connected to the workpiece vibrating seat. Two symmetrically arranged elastic pressure components are installed between the reciprocating pressure plate and the lead pull plate. Two symmetrically arranged lead slots are opened on the lead pull plate and an audible and visual alarm is fixedly installed. A first bevel gear is installed on both the outer shaft and the cam shaft. The two first bevel gears mesh orthogonally. A hollow shaft is rotatably connected to the workpiece vibrating seat. The hollow shaft is connected to the inner shaft. A first drive unit is provided on the cam shaft to drive the workpiece vibrating seat to vibrate vertically with varying amplitude. A second drive unit is provided on the hollow shaft to drive the reciprocating pressure plate to reciprocate horizontally with varying amplitude. Two elastic force clamps with adjustable spacing are provided on the bidirectional lead screw. An alternating drive unit is provided on the carrier to drive the bidirectional lead screw to alternately rotate forward and backward. The welding frame is raised and lowered on the base. A laser welding gun is installed on the welding frame at the position corresponding to the welding station, a cooling fan is installed at the position corresponding to the cooling station, and a binocular camera is installed at the position corresponding to the composite inspection station. The transmission unit is configured to drive the indexing frame to rotate intermittently by 90°, and to drive the inner shaft, outer shaft and lead screw alternately in the composite inspection station. The positioning unit is configured to maintain normal pressure at the position of the vacuum suction hole at the corresponding loading / unloading station, and maintain negative pressure at the position of the vacuum suction hole at the non-loading / unloading station.

[0005] Based on the above technical solution, the present invention can be further improved as follows.

[0006] Preferably, an LED filament driver board body is movably installed in the code slot, a power pin is snapped into the pin slot, and a power interface that is adapted to and connected to the power slot is fixedly provided on the LED filament driver board body.

[0007] Preferably, an industrial control host is fixedly installed on the front end face of the base. The data output terminal of the binocular camera, the power control terminal of the power socket, and the power control terminal of the audible and visual alarm are all connected to the industrial control host. Two hydraulic lifting cylinders are installed on the base, and the ends of the two hydraulic lifting cylinders are fixedly connected to the welding frame.

[0008] Preferably, the lead screw alternating drive unit includes a bottom shaft rotatably sleeved on an inner shaft and a reciprocating shaft rotatably connected to a carrier. A half-tooth gear is installed on the bottom shaft, and a reciprocating gear is fixedly installed on the reciprocating shaft. The half-tooth gear meshes with the reciprocating gear. A rotary torsion spring is provided at the rotatable connection between the reciprocating shaft and the carrier. A second bevel gear is fixedly installed on both the reciprocating shaft and the bidirectional lead screw. The two second bevel gears mesh orthogonally. The bidirectional lead screw is symmetrically provided with a left-hand threaded section and a right-hand threaded section. The left-hand threaded section and the right-hand threaded section are respectively connected to two elastic force-applying clamps. Both elastic force-applying clamps are slidably connected to the carrier. A lower gear that cooperates with the transmission unit is installed at the bottom of the bottom shaft.

[0009] Preferably, the elastic force clamp is disposed between the pin pull plate and the load vibrating seat, and the elastic force clamp is made of rubber.

[0010] Preferably, a spline drive section is fixedly installed on the top of the inner shaft, and a spline groove is opened in the hollow shaft to slide and connect with the spline drive section. The cross-sections of the spline groove and the spline drive section are both regular hexagons.

[0011] Preferably, both the first driving unit and the second driving unit include rollers and rotary wheels. Two cams are symmetrically mounted on the rotary wheel, and the two cams alternately abut against the rollers. The abutment strokes of the two cams against the rollers are different. The rotary wheel in the first driving unit is fixedly mounted on a cam shaft, and the roller on it is rotatably connected to the load-bearing vibrating seat. The rotary wheel in the second driving unit is fixedly mounted on a hollow shaft, and the roller on it is rotatably connected to the reciprocating pressure plate. Return springs are installed between the load-bearing vibrating seat and the carrier frame, and between the reciprocating pressure plate and the load-bearing vibrating seat. The axis of the rotary wheel in the first driving unit is parallel to the horizontal plane, and the axis of the rotary wheel in the second driving unit is perpendicular to the horizontal plane. The bottom of both the outer shaft and the inner shaft is equipped with an upper gear connected to the transmission unit.

[0012] Preferably, the positioning unit includes a vacuum conduit and a vacuum pump fixed on the base. A vacuum generating chamber is provided inside the vacuum conduit, and the vacuum generating end of the vacuum pump is connected to the vacuum generating chamber. A valve ring is rotatably connected to the vacuum conduit. A negative pressure chamber is provided on each load vibrating seat. The vacuum suction hole is connected to the corresponding negative pressure chamber. A corrugated metal connecting pipe is connected between the valve ring and each of the four negative pressure chambers. A valve hole is provided on the vacuum conduit at the positions corresponding to the welding station, cooling station, and composite detection station.

[0013] Preferably, the transmission unit includes two servo motors fixed on the base, a rotating shaft rotatably sleeved on the vacuum tube, and synchronous transmission belts drivingly connected to the output shafts of the two servo motors. One synchronous transmission belt is drivingly connected to the rotating shaft, and the other synchronous transmission belt is drivingly connected to the indexing frame. An internal gear ring is fixedly mounted on the rotating shaft. A directional transmission shaft is rotatably connected to the base at a position corresponding to the composite detection station. Three external gears are mounted on the directional transmission shaft. At the composite detection station, the three external gears are respectively meshed with the lower gear and two upper gears, and one of the external gears is meshed with the internal gear ring.

[0014] The beneficial effects of this invention are: This invention integrates loading / unloading stations, welding stations, cooling stations, and composite testing stations sequentially in a counter-clockwise direction on a base. A dividing rotating frame drives four carriers to rotate intermittently by 90°. After laser welding and forced cooling, each LED filament driver board automatically enters the composite testing station. At this station, a transmission unit simultaneously drives the inner shaft, outer shaft, and bottom shaft to rotate. On one hand, a first drive unit drives the carrier vibrating seat to perform variable-amplitude vibration in the vertical direction, applying a controllable alternating vertical load to the weld joint to test the welding strength. On the other hand, a second drive unit drives a reciprocating pressure plate to perform variable-amplitude reciprocating motion in the horizontal direction. An elastic pressure component drives a lead pull plate to apply a horizontal reciprocating pulling force to the power pins, achieving online detection of the tensile strength of the weld joint. Simultaneously, the filament... The alternating drive unit drives the bidirectional lead screw to alternately rotate forward and backward through the intermittent meshing of the half-tooth gear and the reciprocating gear and the reset of the rotary torsion spring. This causes two elastic force clamps made of rubber to reciprocate and apply force to the power pins, further verifying the ability of the solder joint to withstand mechanical stress. Thus, this invention integrates three different dimensions of welding strength detection methods—vertical vibration, horizontal reciprocating tension, and reciprocating clamping force—in a single welding device, filling the technical gap of automated online detection of mechanical strength after LED driver board welding. In addition, the binocular camera simultaneously completes the detection of appearance defects, and the power socket completes the continuity test. This achieves multi-dimensional, full-process, 100% online full inspection of welding quality, completely getting rid of the predicament of low efficiency, large error, and easy outflow of defective products in traditional manual visual sampling inspection.

[0015] 2) In this invention, the transmission unit utilizes two servo motors to drive the indexing frame to rotate intermittently and the rotating shaft to rotate continuously. The rotating shaft, via an internal gear ring, drives the external gear on the directional transmission shaft to always be in a ready-to-mesh state. When the carrier precisely rotates into the composite inspection station with the indexing frame, the external gear immediately meshes with the lower gear and two upper gears, synchronously providing power for vertical vibration, horizontal reciprocating motion, and reciprocating force application of the elastic force clamp. This eliminates the need for a separate drive source for each station, greatly simplifying the power transmission chain. Simultaneously, the positioning unit, through the ingenious cooperation of the vacuum conduit, valve ring, and valve orifice, enables the vacuum... The suction port maintains normal pressure at the loading and unloading stations to facilitate automatic workpiece loading and unloading by the robotic arm. At the welding, cooling, and composite inspection stations, it automatically switches to negative pressure adsorption and fixation. This ensures the positioning stability of the workpiece when subjected to multi-dimensional vibration testing and avoids the obstruction and pressure damage to precision components caused by traditional pressure plate clamping. The above-mentioned linkage design allows the three major processes of welding, cooling, and composite inspection to be seamlessly connected on a rotating indexing platform. Moreover, multiple strength test actions inside the composite inspection station are driven by the same transmission source, with precise matching of action timing, which significantly improves the consistency and reliability of the inspection. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a welding device for processing and producing LED filament lamp driver boards according to the present invention. Figure 2 This is a schematic diagram of the structure of the base and indexing frame of the present invention; Figure 3 For the present invention Figure 2 A magnified schematic diagram of the partial structure at point A in the middle; Figure 4 This is a schematic cross-sectional view of the reciprocating shaft and indexing frame of the present invention. Figure 5 For the present invention Figure 4 A magnified view of the structure at point B in the middle; Figure 6 This is a schematic diagram of the structure of the vibrating support and frame of the present invention; Figure 7 For the present invention Figure 6 A schematic diagram of the cross-sectional structure; Figure 8 For the present invention Figure 7 A magnified schematic diagram of the local structure at point C; Figure 9 This is a schematic diagram of the elastic pressure application component and the upper gear of the present invention; Figure 10 This is a schematic diagram of the structure of the bottom shaft and reciprocating gear of the present invention.

[0017] The attached diagram lists the components represented by each number as follows: 1. Base; 2. Indexing frame; 3. Carrier; 4. Welding frame; 5. LED filament driver board body; 6. Power pins; 7. Vacuum pump; 8. Servo motor; 101. Industrial control host; 102. Hydraulic lifting cylinder; 301. Load-bearing vibrating seat; 302. Bidirectional lead screw; 303. Inner shaft; 304. Convex shaft; 305. Outer shaft; 306. Code slot; 307. Power slot; 308. Vacuum suction hole; 309. Reciprocating pressure plate; 310. Pin pull plate; 311. Elastic pressure assembly; 312. Pin slot; 313. Audible and visual alarm; 314. Hollow shaft; 315. 316. Elastic force-applying clamp; 317. Bottom shaft; 318. Reciprocating shaft; 319. Half gear; 320. Reciprocating gear; 321. Rotary torsion spring; 322. Lower gear; 323. Splined transmission section; 324. Roller; 325. Return spring; 326. Cam; 328. Upper gear; 401. Laser welding torch; 402. Cooling fan; 403. Binocular camera; 701. Vacuum conduit; 702. Valve ring; 703. Corrugated metal connecting pipe; 704. Valve hole; 801. Rotating shaft; 802. Internal gear ring; 803. Directional transmission shaft; 804. External gear. Detailed Implementation

[0018] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0019] The present invention provides the following preferred embodiments. like Figure 1-10 As shown, a welding device for processing and producing LED filament lamp driver boards includes a base 1. An industrial control host 101 is fixedly installed on the front end face of the base 1. Along a counterclockwise direction, a loading / unloading station, a welding station, a cooling station, and a composite inspection station are sequentially arranged on the base. The device also includes: Indexing frame 2, on which four carriers 3 are installed, and each carrier 3 is equipped with a workpiece holding and inspection mechanism; The workpiece holding and inspection mechanism includes a workpiece vibrating seat 301 slidably connected to the carrier 3, a bidirectional lead screw 302 rotatably connected to the carrier 3, an inner shaft 303 and a convex shaft 304. An outer shaft 305 is rotatably sleeved on the inner shaft 303. The top surface of the workpiece vibrating seat 301 is provided with a code slot 306 and a power slot 307 is fixedly installed. The LED filament driver board body 5 is fixedly provided with a power interface that is adapted to and connected to the power slot 307. After the LED filament driver board body 5 is installed in the code slot 306, the power slot 307 is connected to the power interface and provides power to the LED filament driver board body 5. At the cooling station and composite testing station, the power interface provides power, while at the unloading station and welding station, the power interface remains in a non-powered state. Vacuum suction holes 308 are provided in the array within the code slot 306; In a preferred embodiment, an LED filament driver board body 5 is movably installed in the code slot 306, and the specifications of the code slot 306 are adapted to the specifications of the LED filament driver board body 5. A reciprocating pressure plate 309 and a lead pull plate 310 are slidably connected on the object carrier 301. Two symmetrically arranged elastic pressure components 311 are installed between the reciprocating pressure plate 309 and the lead pull plate 310. In a preferred embodiment, the elastic pressure assembly 311 includes a T-shaped pressure guide rod fixedly mounted on the reciprocating pressure plate 309. The T-shaped pressure guide rod is slidably connected to the pin pull plate 310. A pressure spring is sleeved on the T-shaped pressure guide rod at a position corresponding to the position between the pin pull plate 310 and the reciprocating pressure plate 309. The pin pull plate 310 has two symmetrically arranged pin slots 312 and is equipped with an audible and visual alarm 313. The pin slot 312 is fitted with power pin 6; At the loading and unloading station, this device is equipped with two six-axis robotic arms. One six-axis robotic arm is used to perform the loading of the LED filament driver board body 5 and the unloading of the LED filament driver board body 5 after inspection. During the unloading operation, according to the composite inspection results, the LED filament driver board body 5 after welding is transferred to the good product area and the non-good product area respectively. Another six-axis robotic arm is used to perform automatic feeding of power pin 6; During continuous operation of the equipment, the two six-axis robotic arms work together in a division of labor. First, the drive board loading and unloading robotic arm accurately places the LED filament drive board body 5 into the code slot 306 of the load vibrating seat 301 to complete the loading of a single workpiece. Then, the power pin 6 loading robotic arm accurately inserts the power pin 6 to be welded into the pin slot 312 of the pin pull plate 310 to complete the pre-positioning. After the workpiece completes the welding, cooling and composite inspection process with the indexing frame 2, the loading and unloading robot arm on the drive plate synchronously receives the composite inspection results from the industrial control host 101, unloads qualified workpieces to the good product area and sorts unqualified workpieces to the non-good product area, realizing the fully automated closed-loop operation of loading, unloading and defective product sorting. This solution completely replaces manual loading, unloading, and sorting operations through the specialized division of labor of the two robotic arms. This not only greatly improves the consistency of production cycle and overall processing efficiency, but also effectively avoids human errors such as pin alignment deviation, drive board placement offset, and sorting errors caused by manual operation, thereby reducing the processing defect rate from the source. On the other hand, integrating the unloading and sorting process with the loading and unloading stations eliminates the need for separate sorting stations and supporting transfer mechanisms, significantly reducing the overall footprint of the equipment. At the same time, it enables real-time linkage between processing and testing results, ensuring the timeliness and accuracy of product quality control.

[0020] Both the outer shaft 305 and the cam shaft 304 are equipped with first bevel gears, and the two first bevel gears mesh orthogonally. A hollow shaft 314 is rotatably connected to the load-bearing vibrating seat 301, and the hollow shaft 314 is connected to the inner shaft 303 in a transmission connection. In a preferred embodiment, a spline drive section 322 is fixedly installed on the top of the inner shaft 303, and a spline groove is opened in the hollow shaft 314 to slide and connect with the spline drive section 322. The cross-sections of the spline groove and the spline drive section 322 are both regular hexagonal. The convex shaft 304 is provided with a first driving unit that drives the load vibrating seat 301 to vibrate vertically with varying amplitude. The hollow shaft 314 is provided with a second driving unit that drives the reciprocating pressure plate 309 to reciprocate horizontally with varying amplitude. The bidirectional lead screw 302 is provided with two elastic force clamps 315 with adjustable spacing. The carrier frame 3 is provided with a lead screw alternation driving unit that drives the bidirectional lead screw 302 to alternate forward and reverse rotation. The elastic force clamp 315 is disposed between the pin pull plate 310 and the load vibrating seat 301, and the elastic force clamp 315 is made of rubber. Before welding and during cooling, the distance between the two elastic force clamps 315 is kept to a minimum, and this distance is less than the distance between the two power supply pins 6. During the composite testing process, two elastic force clamps 315 apply reciprocating force to the power pin 6 to test the welding strength. The transmission unit is configured to drive the indexing frame 2 to rotate intermittently by 90°, and to drive the inner shaft 303, outer shaft 305 and lead screw alternately in the composite inspection station. The lead screw alternating drive unit includes a bottom shaft 316 rotatably sleeved on an inner shaft 303 and a reciprocating shaft 317 rotatably connected to a carrier 3. A half-tooth gear 318 is installed on the bottom shaft 316, and a reciprocating gear 319 is fixedly installed on the reciprocating shaft 317. The half-tooth gear 318 meshes with the reciprocating gear 319. A rotary torsion spring 320 is provided at the rotatable connection between the reciprocating shaft 317 and the carrier 3. A second bevel gear is fixedly installed on both the reciprocating shaft 317 and the bidirectional lead screw 302. The two second bevel gears mesh orthogonally. A left-hand threaded section and a right-hand threaded section are symmetrically arranged on the bidirectional lead screw 302. The left-hand threaded section and the right-hand threaded section are respectively connected to two elastic force clamps 315. Both elastic force clamps 315 are slidably connected to the carrier 3. A lower gear 321 that cooperates with the transmission unit is installed at the bottom of the bottom shaft 316. At the composite inspection station, the transmission unit drives the bottom shaft 316 to rotate continuously in one direction through the lower gear 321. The half-tooth gear 318 on the bottom shaft 316 rotates synchronously. When the toothed section of the half-tooth gear 318 meshes with the reciprocating gear 319, it drives the reciprocating shaft 317 to rotate in the forward direction. Through the orthogonally meshed second bevel gear, it drives the bidirectional lead screw 302 to rotate in the forward direction, so that the two elastic force clamps 315 move synchronously towards each other along the left-hand thread section and the right-hand thread section. When the toothless section of the half-tooth gear 318 is opposite to the reciprocating gear 319, the meshing transmission relationship is broken. The reciprocating shaft 317 rotates in the opposite direction under the reset action of the rotary torsion spring 320, synchronously driving the bidirectional lead screw 302 to rotate in the opposite direction, so that the two elastic force clamps 315 move synchronously in opposite directions. In this way, the bidirectional lead screw 302 is alternately rotated forward and reverse through the unidirectional rotation of the bottom shaft 316, and the reciprocating force detection of the elastic force clamps 315 on the power pin 6 is completed. Both the first drive unit and the second drive unit include a roller 323 and a rotating wheel 324. Two cams 326 are symmetrically mounted on the rotating wheel 324. The two cams 326 alternately abut against the roller 323, and the abutment strokes of the two cams 326 against the roller 323 are different. The rotating wheel 324 in the first drive unit is fixedly mounted on the cam shaft 304, and the roller 323 on it is rotatably connected to the load-bearing vibrating seat 301. The rotating wheel 324 in the second drive unit is fixedly mounted on the hollow shaft 314, and the roller 323 on it is rotatably connected to the reciprocating pressure plate 309. Return springs 325 are installed between the load-bearing vibrating seat 301 and the carrier 3, and between the reciprocating pressure plate 309 and the load-bearing vibrating seat 301. The axis of the rotating wheel 324 in the first drive unit is parallel to the horizontal plane, and the axis of the rotating wheel 324 in the second drive unit is perpendicular to the horizontal plane. The bottom of the outer shaft 305 and the inner shaft 303 are both equipped with upper gears 328 connected to the transmission unit.

[0021] At the composite testing station, the transmission unit drives the inner shaft 303 and the outer shaft 305 to rotate synchronously through two sets of upper gears 328 respectively. The outer shaft 305 drives the cam shaft 304 to rotate through the orthogonally meshing first bevel gear, so that the rotating wheel 324 of the first drive unit rotates synchronously. Two cams 326 with different contact strokes on the rotating wheel 324 alternately contact the roller 323. With the reset action of the reset spring 325 between the load vibrating seat 301 and the frame 3, the load vibrating seat 301 drives the LED filament drive board body 5 to perform amplitude vibration in the vertical direction, and finally realizes the vertical vibration detection of the welding strength of the weld point. Meanwhile, the inner shaft 303 drives the hollow shaft 314 to rotate synchronously through the spline transmission section 322, causing the rotating wheel 324 of the second drive unit to rotate synchronously. The two cams 326 with different contact strokes alternately contact the roller 323. With the reset action of the reset spring 325 between the reciprocating pressure plate 309 and the load vibrating seat 301, the reciprocating pressure plate 309 is driven to perform variable amplitude reciprocating motion in the horizontal direction. Then, through the elastic pressure component 311, the pin pull plate 310 is driven to reciprocate synchronously, applying a horizontal reciprocating vibration force to the power pin 6 in the pin slot 312, and finally realizing the tensile strength test of the welding point.

[0022] The transmission unit includes two servo motors 8 fixed on the base 1 and a rotating shaft 801 rotatably mounted on the vacuum conduit 701. The output shafts of the two servo motors 8 are each connected to a synchronous transmission belt. One synchronous transmission belt is connected to the rotating shaft 801, and the other synchronous transmission belt is connected to the indexing frame 2. An internal gear ring 802 is fixed on the rotating shaft 801. A directional transmission shaft 803 is rotatably connected to the base 1 at the position corresponding to the composite inspection station. Three external gears 804 are mounted on the directional transmission shaft 803. At the composite inspection station, the three external gears 804 are respectively meshed with the lower gear 321 and the two upper gears 328, and one external gear 804 is meshed with the internal gear ring 802.

[0023] When the device is running, a servo motor 8 drives the indexing frame 2 to rotate precisely at 90° intervals via a synchronous transmission belt, which in turn drives the workpiece holding and inspection mechanisms on the four carriers 3 to circulate sequentially to the loading and unloading station, welding station, cooling station and composite inspection station, thus realizing four-station cyclic operation. Another servo motor 8 drives the rotating shaft 801 to rotate continuously via a synchronous transmission belt. The internal gear ring 802 on the rotating shaft 801 synchronously drives the external gear 804 on the directional transmission shaft 803 to rotate continuously. When the workpiece holding and inspection mechanism moves to the composite inspection station with the indexing frame 2, the three external gears 804 on the directional transmission shaft 803 are precisely meshed with the lower gear 321 of the corresponding bottom shaft 316, the upper gear 328 of the inner shaft 303 and the outer shaft 305, respectively, synchronously driving the inner shaft 303, the outer shaft 305 and the bottom shaft 316 to rotate, providing a stable driving force for the composite vibration action of the workpiece holding and inspection mechanism at this station.

[0024] The welding frame 4 is raised and lowered on the base 1. Two hydraulic lifting cylinders 102 are installed on the base 1. The ends of the two hydraulic lifting cylinders 102 are fixedly connected to the welding frame 4. A laser welding gun 401 is installed on the welding frame 4 at the position corresponding to the welding station, a cooling fan 402 is installed at the position corresponding to the cooling station, and a binocular camera 403 is provided at the position corresponding to the composite inspection station. The data output terminal of the binocular camera 403, the electrical control terminal of the power socket 307, and the electrical control terminal of the audible and visual alarm 313 are all connected to the industrial control host 101 via data connection. The bottom of the laser welding gun 401 is provided with two welding ends, the bottom of the cooling fan 402 is provided with two air outlets, and the binocular camera 403 is provided with two acquisition ends. The welding ends, air outlets and acquisition ends are all directly opposite the welding point between the power pin 6 and the LED filament driver board body 5. The hydraulic lifting cylinder 102 can drive the welding frame 4 to lift as a whole, adapting to the processing requirements of LED filament driver board body 5 with different thicknesses and specifications, ensuring that the working distance between each working end and the workpiece welding point is always in the optimal range. When the workpiece is transferred to the welding station by the indexing frame 2, the dual welding ends of the laser welding gun 401 simultaneously perform laser welding operations on the welding points of the two power pins 6 and the drive board. After welding, the workpiece is transferred to the cooling station. The dual exhaust ends of the cooling fan 402 simultaneously provide forced air cooling to the two welding points, so that the molten solder can be cooled and solidified quickly, shortening the cooling cycle. After the workpiece is transferred to the composite inspection station, the dual acquisition ends of the binocular camera 403 simultaneously acquire high-definition images of the two welding points and transmit the acquired data to the industrial control host 101 in real time for appearance defect detection. At the same time, in conjunction with the power supply pin 6 for power continuity detection and the elastic force clamp 315 for welding firmness detection, a multi-dimensional composite inspection of welding quality is completed.

[0025] The positioning unit is configured to maintain normal pressure at the position of the vacuum suction hole 308 at the corresponding loading / unloading station, and maintain negative pressure at the position of the non-loading / unloading station.

[0026] Specifically, when the vacuum suction port 308 is located at the loading and unloading station, its interior is kept at normal pressure; When located at a welding station, cooling station, or composite testing station, its interior is kept under negative pressure. The positioning unit includes a vacuum conduit 701 and a vacuum pump 7 fixed on the base 1. A vacuum generating chamber is provided inside the vacuum conduit 701. The vacuum generating end of the vacuum pump 7 is connected to the vacuum generating chamber. A valve ring 702 is rotatably connected to the vacuum conduit 701. A negative pressure chamber is provided on each load vibrating seat 301. A vacuum suction hole 308 is connected to the corresponding negative pressure chamber. A corrugated metal connecting pipe 703 is connected between the valve ring 702 and each of the four negative pressure chambers. A valve hole 704 is provided on the vacuum conduit 701 at the positions corresponding to the welding station, cooling station and composite detection station.

[0027] Vacuum pump 7 continuously provides a stable negative pressure environment for the vacuum generating chamber of vacuum conduit 701. When the load vibrating seat 301 moves to the loading / unloading station with indexing frame 2, the negative pressure chamber corresponding to the load vibrating seat 301 is connected to the normal pressure section of vacuum conduit 701 through corrugated metal connecting pipe 703 and valve ring 702, so that the vacuum suction hole 308 in the code slot 306 is kept at normal pressure, which facilitates the loading and unloading of the drive plate. When the vibrating support 301 moves to the welding station, cooling station, or composite testing station, the corresponding negative pressure chamber is connected to the vacuum generating chamber through the valve ring 702 and valve hole 704, so that the vacuum suction hole 308 in the code slot 306 forms a stable negative pressure, which firmly adsorbs and fixes the LED filament driver board body 5 in the code slot 306.

[0028] By combining the valve ring 702 with the vacuum conduit 701 with the valve hole 704, the negative pressure state of the vacuum suction hole 308 is automatically switched with the station flow. There is no need to configure a separate vacuum control valve and independent control program for the negative pressure chamber of each load vibrating seat 301. This greatly simplifies the structure of the vacuum control system, reduces the control complexity of the equipment, and ensures that the timing of the negative pressure switching of each station is completely synchronized with the rotation of the indexing frame 2, effectively avoiding the workpiece displacement and falling problem caused by adsorption failure. The negative pressure adsorption and fixing method using array-type vacuum suction holes 308 achieves surface contact and traceless fixing of the LED filament driver board body 5. Compared with the traditional pressure plate clamping and fixing method, it will not obstruct or damage the precision components and pads on the surface of the driver board. It not only ensures that the working space of the welding gun is unobstructed during laser welding, improving the convenience of welding operations, but also fully protects the precision components on the driver board, further improving the yield of workpiece processing. The specific steps for using this invention are as follows: During the preparation phase, the staff completed the debugging of the processing parameters of the industrial control host 101 and the system's full-link self-test. They then sequentially started the vacuum pump 7, two sets of servo motors 8, and hydraulic lifting cylinder 102 on the base 1. The vacuum pump 7 continuously provided a stable negative pressure environment for the vacuum generating chamber in the vacuum conduit 701. The hydraulic lifting cylinder 102 adjusted the lifting height of the welding frame 4 according to the thickness specifications of the LED filament driver board body 5 to be processed, so that the working ends of the laser welding gun 401, cooling fan 402, and binocular camera 403 maintained the optimal working distance from the workpiece welding point. The indexing rotating frame 2 drove the four carrier frames 3 to complete the initial alignment, so that the four carrier frames 3 corresponded to the loading and unloading station, welding station, cooling station, and composite inspection station arranged counterclockwise on the base 1, respectively. The two sets of six-axis robotic arms at the loading and unloading station completed the positioning calibration and entered the ready-to-work state. During the working phase, at the loading and unloading station, a set of six-axis robotic arms precisely places the LED filament driver board body 5 to be processed into the slot 306 of the corresponding carrier 3's vibrating support 301. Meanwhile, another set of six-axis robotic arms precisely inserts the power pins 6 to be soldered into the pin slots 312 of the pin puller 310 to complete pre-positioning. At this time, the vacuum suction hole 308 corresponding to this station is maintained at constant pressure by the positioning unit. After loading is completed, the indexing frame 2, driven by the servo motor 8 and synchronous transmission belt, completes a 90° intermittent rotation, thus completing the loading process. The workpiece is transferred to the welding station, and the positioning unit synchronously completes the negative pressure state switching. The negative pressure chamber corresponding to the workpiece is connected to the valve hole 704 on the vacuum conduit 701 through the corrugated metal connecting pipe 703 and valve ring 702, thereby forming a passage with the vacuum generating chamber. The vacuum suction hole 308 in the code slot 306 forms a stable negative pressure to firmly adsorb and fix the LED filament driver board body 5. At the same time, the laser welding gun 401 on the welding frame 4 corresponding to the welding station completes the dual-point synchronous laser welding operation at the welding point between the power pin 6 and the LED filament driver board body 5. After welding is completed, the indexing frame 2 completes another 90° intermittent rotation, which drives the workpiece to the cooling station. The cooling fan 402 on the welding frame 4 corresponding to the cooling station performs double-end synchronous forced air cooling on the welding point, so that the molten solder cools and solidifies quickly. During this process, the vacuum suction hole 308 maintains a negative pressure fixed state to prevent the workpiece from shifting. Subsequently, the indexing frame 2 continues to complete 90° intermittent rotation, driving the workpiece to the composite inspection station. The continuously rotating shaft 801 in the transmission unit drives the external gear 804 on the directional transmission shaft 803 to rotate continuously through the internal gear ring 802. This gear precisely meshes with the lower gear 321 of the bottom shaft 316, the upper gear 328 of the inner shaft 303 and the outer shaft 305 on the carrier 3 of this station, synchronously driving the inner shaft 303, the outer shaft 305 and the bottom shaft 316 to rotate. On one hand, the power socket 307 is connected to the power interface of the LED filament driver board body 5 to supply power and complete the circuit continuity test. The binocular camera 403 synchronously acquires high-definition images of the two welding points and transmits the acquired data to the industrial control host 101 in real time to complete the appearance defect detection. On the other hand, the outer shaft 305 drives the cam shaft 304 to rotate through the orthogonally meshing first bevel gear. This drives the carrier vibrating seat 301 through the first drive unit to drive the LED filament driver board body 5 to perform amplitude vibration in the vertical direction, completing the vertical welding strength of the welding point. For vibration detection, the inner shaft 303 drives the hollow shaft 314 to rotate synchronously through the spline transmission section 322 at the top. The second drive unit drives the reciprocating pressure plate 309 to perform variable amplitude reciprocating motion in the horizontal direction. Then, through the elastic pressure component 311, the pin pull plate 310 applies horizontal reciprocating vibration force to the power pin 6, completing the tensile strength test of the solder joint in the horizontal direction. At the same time, the bottom shaft 316 drives the intermittent meshing of the internal half gear 318 and the reciprocating gear 319 through the screw alternating drive unit. With the reset action of the rotary torsion spring 320, it drives the bidirectional screw 302 to alternately rotate forward and backward. This drives the two elastic force clamps 315 to move synchronously in opposite directions along the bidirectional screw 302, applying reciprocating force to the power pin 6, completing the supplementary test of the welding strength. If problems such as poor welding conductivity, appearance defects, or insufficient strength are found during the test, the audible and visual alarm 313 on the pin pull plate 310 will be triggered immediately, and the industrial control host 101 will record the test results of the corresponding workpiece synchronously. After completing the full-dimensional composite inspection, the indexing frame 2 completes the last 90° intermittent rotation, driving the workpiece back to the loading and unloading station. The positioning unit simultaneously switches the vacuum suction hole 308 corresponding to the station to the normal pressure state, releasing the adsorption and fixation of the LED filament driver board body 5. According to the inspection results recorded by the industrial control host 101, the six-axis robotic arm unloads qualified workpieces into the good product area and sorts unqualified workpieces into the non-good product area, completing the full process of processing a single workpiece. The equipment repeats this cycle to complete the continuous processing of batch workpieces. The amplitude and frequency generated by the first and second drive units are configured to apply alternating stress to the weld joints at a level far below their yield strength. Specifically, the vertical amplitude parameter is set in the range of 0.05mm-0.2mm, the horizontal reciprocating stroke parameter is set in the range of 0.1mm-0.5mm, and the frequency parameter is set in the range of 2Hz-10Hz. The clamping force of the elastic force-applying clamp 315 is controlled within the range of 0.5N-2N by the preset torque of the rotary torsion spring 320; All test parameters are designed to ensure that while detecting cold or false solder joints, they do not cause plastic deformation or fatigue damage to normally welded joints.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A welding device for processing and producing LED filament lamp driver boards, comprising a base (1) having, in a counterclockwise direction, sequentially arranged, a loading / unloading station, a welding station, a cooling station, and a composite inspection station, characterized in that, Also includes: Indexing frame (2) is equipped with four carriers (3), each carrier (3) is equipped with a workpiece holding and inspection mechanism; The workpiece holding and inspection mechanism includes a workpiece vibrating seat (301) slidably connected to a carrier (3), a bidirectional lead screw (302) rotatably connected to the carrier (3), an inner shaft (303), and a convex shaft (304). An outer shaft (305) is rotatably sleeved on the inner shaft (303). A code slot (306) is opened on the top surface of the workpiece vibrating seat (301) and a power supply slot (307) is fixedly installed. Vacuum suction holes (308) are arrayed in the code slot (306). A reciprocating pressure plate (309) and a lead pull plate (310) are slidably connected on the workpiece vibrating seat (301). Two symmetrically arranged elastic pressure components (311) are installed between the reciprocating pressure plate (309) and the lead pull plate (310). Two symmetrically arranged guides are opened on the lead pull plate (310). The foot slot (312) is fixedly equipped with an audible and visual alarm (313). The outer shaft (305) and the cam shaft (304) are both equipped with first bevel gears. The two first bevel gears mesh orthogonally. The load vibrating seat (301) is rotatably connected with a hollow shaft (314). The hollow shaft (314) is connected to the inner shaft (303) for transmission. The cam shaft (304) is equipped with a first drive unit that drives the load vibrating seat (301) to vibrate vertically. The hollow shaft (314) is equipped with a second drive unit that drives the reciprocating pressure plate (309) to reciprocate horizontally. The bidirectional lead screw (302) is equipped with two elastic force clamps (315) with adjustable spacing. The frame (3) is equipped with a lead screw alternation drive unit that drives the bidirectional lead screw (302) to alternate forward and reverse rotation. The welding frame (4) is raised and lowered on the base (1). A laser welding gun (401) is installed on the welding frame (4) at the position corresponding to the welding station, a cooling fan (402) is installed at the position corresponding to the cooling station, and a binocular camera (403) is installed at the position corresponding to the composite inspection station. The transmission unit is configured to drive the indexing frame (2) to rotate intermittently by 90°, and to drive the inner shaft (303), outer shaft (305) and lead screw alternately in the composite inspection station; The positioning unit is configured to maintain the vacuum suction hole (308) at normal pressure at the corresponding loading / unloading station and at negative pressure at the non-loading / unloading station.

2. The welding device for processing and producing LED filament lamp driver boards according to claim 1, characterized in that, The LED filament driver board body (5) is movably installed in the code slot (306), and the power pin (6) is snapped into the pin slot (312). The LED filament driver board body (5) is fixedly provided with a power interface that is adapted and connected to the power slot (307).

3. The welding device for processing and producing LED filament lamp driver boards according to claim 1, characterized in that, An industrial control host (101) is fixedly installed on the front end of the base (1). The data output terminal of the binocular camera (403), the power control terminal of the power slot (307) and the power control terminal of the sound and light alarm (313) are all connected to the industrial control host (101). Two hydraulic lifting cylinders (102) are installed on the base (1). The ends of the two hydraulic lifting cylinders (102) are fixedly connected to the welding frame (4).

4. The welding device for processing and producing LED filament lamp driver boards according to claim 1, characterized in that, The lead screw alternating drive unit includes a bottom shaft (316) rotatably sleeved on an inner shaft (303) and a reciprocating shaft (317) rotatably connected to a carrier (3). A half-tooth gear (318) is mounted on the bottom shaft (316), and a reciprocating gear (319) is fixedly mounted on the reciprocating shaft (317). The half-tooth gear (318) meshes with the reciprocating gear (319). A rotary torsion spring (320) is provided at the rotatable connection between the reciprocating shaft (317) and the carrier (3). A second bevel gear is fixedly installed on both the reciprocating shaft (317) and the bidirectional lead screw (302). The two second bevel gears mesh orthogonally. The bidirectional lead screw (302) is symmetrically provided with a left-hand thread section and a right-hand thread section. The left-hand thread section and the right-hand thread section are respectively connected to two elastic force clamps (315). The two elastic force clamps (315) are slidably connected to the carrier (3). A lower gear (321) that cooperates with the transmission unit is installed at the bottom of the bottom shaft (316).

5. The welding device for processing and producing LED filament lamp driver boards according to claim 1, characterized in that, The elastic force clamp (315) is disposed between the pin pull plate (310) and the load vibrating seat (301), and the elastic force clamp (315) is made of rubber.

6. The welding device for processing and producing LED filament lamp driver boards according to claim 1, characterized in that, A spline drive section (322) is fixedly installed on the top of the inner shaft (303). A spline groove is opened in the hollow shaft (314) and is slidably connected to the spline drive section (322). The cross-sections of the spline groove and the spline drive section (322) are both regular hexagons.

7. The welding device for processing and producing LED filament lamp driver boards according to claim 1, characterized in that, Both the first and second driving units include rollers (323) and rotary wheels (324). Two cams (326) are symmetrically mounted on the rotary wheel (324). The two cams (326) alternately abut against the rollers (323), and the abutment strokes of the two cams (326) against the rollers (323) are different. The rotary wheel (324) in the first driving unit is fixedly mounted on a cam shaft (304), and the rollers (323) on it are rotatably connected to a vibrating support (301). The rotary wheel (324) in the second driving unit is fixedly mounted on... The rollers (323) mounted on the hollow shaft (314) are rotatably connected to the reciprocating pressure plate (309). Return springs (325) are installed between the load-bearing vibrating seat (301) and the carrier (3) and between the reciprocating pressure plate (309) and the load-bearing vibrating seat (301). The axis of the rotating wheel (324) in the first drive unit is parallel to the horizontal plane, and the axis of the rotating wheel (324) in the second drive unit is perpendicular to the horizontal plane. The bottom of the outer shaft (305) and the inner shaft (303) are both equipped with upper gears (328) connected to the transmission unit.

8. The welding device for processing and producing LED filament lamp driver boards according to claim 1, characterized in that, The positioning unit includes a vacuum conduit (701) and a vacuum pump (7) fixed on the base (1). A vacuum generating chamber is provided inside the vacuum conduit (701). The vacuum generating end of the vacuum pump (7) is connected to the vacuum generating chamber. A valve ring (702) is rotatably connected to the vacuum conduit (701). A negative pressure chamber is provided on each load vibrating seat (301). The vacuum suction hole (308) is connected to the corresponding negative pressure chamber. A corrugated metal connecting pipe (703) is connected between the valve ring (702) and the four negative pressure chambers. A valve hole (704) is provided on the vacuum conduit (701) at the positions corresponding to the welding station, cooling station and composite detection station.

9. The welding device for processing and producing LED filament lamp driver boards according to claim 1, characterized in that, The transmission unit includes two servo motors (8) fixed on the base (1) and a rotating shaft (801) rotatably mounted on the vacuum tube (701). The output shafts of the two servo motors (8) are connected to synchronous transmission belts. One synchronous transmission belt is connected to the rotating shaft (801) and the other synchronous transmission belt is connected to the indexing frame (2). An internal gear ring (802) is fixed on the rotating shaft (801). An directional transmission shaft (803) is rotatably connected on the base (1) at the position corresponding to the composite detection station. Three external gears (804) are installed on the directional transmission shaft (803). At the composite detection station, the three external gears (804) are meshed with the lower gear (321) and the two upper gears (328) respectively. One of the external gears (804) is meshed with the internal gear ring (802).

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