Lamp bar welding equipment

Abstract

The invention relates to the technical field of welding, in particular to light bar welding equipment which comprises a platform, a conveying device, a visual sensor and a plurality of laser welding devices. The conveying device is arranged on the platform, a plurality of LED light bars are placed on the conveying device, and the conveying device is used for driving the LED light bars to move. The visual sensor is arranged on the platform and used for detecting speed information of the LED light bar. The laser welding device is arranged on the platform and comprises a laser source and a light beam shaping device, the light beam shaping device is connected with the laser source, the laser source is used for generating laser, and the light beam shaping device is used for converting the laser into a plurality of linear light spots and projecting the linear light spots to tin plates at the two ends of lamp beads on the LED lamp strips. And the tin plates at the two ends of the lamp beads on the LED lamp strip are heated. The welding device has the effect of improving the welding energy utilization rate and the welding efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding, in particular to a lamp strip welding device. BACKGROUND

[0002] In the context of the continuous development of the lighting industry, LED lamp strips are widely used in many fields such as commercial lighting, home lighting, landscape lighting, etc. due to their significant advantages such as energy saving, long service life, high brightness, etc. With the continuous growth of market demand for LED lamp strips, the requirements for their production efficiency and quality are also increasing. As a key link in the production process of LED lamp strips, the process level and equipment performance of welding directly affect the final quality and production efficiency of LED lamp strips. Efficient and accurate welding technology can ensure good electrical and mechanical connection between the lamp beads and the circuit board, thereby improving the stability and reliability of the LED lamp strip. In related technologies, the welding method on the LED lamp strip generally adopts reflow welding or laser spot welding. Reflow welding requires a heating wire to heat the air around the LED lamp strip, and the heated hot air flows to the moving LED lamp strip. This method consumes a large amount of energy, and large-scale heating can easily cause thermal damage to other parts of the LED lamp strip. The laser spot welding method only heats the tin disc at both ends of the lamp bead, which can improve energy utilization efficiency and avoid damage to other parts of the LED lamp strip. However, it is necessary to fix the moving LED lamp strip and accurately align the laser emitter with the tin disc at both ends of the lamp bead on the LED lamp strip, which directly reduces the welding efficiency of the LED lamp strip.

[0003] In view of the related technologies in the above, there are defects such as low energy utilization rate, easy damage to other components of the LED lamp strip, and low welding efficiency. SUMMARY

[0004] In order to improve the energy utilization rate of welding, avoid damage to other components of the LED lamp strip, and improve the welding efficiency, the present application provides a lamp strip welding device.

[0005] The lamp strip welding device provided by the present application adopts the following technical scheme: A lamp strip welding device, comprising: a platform; a conveying device arranged on the platform, a plurality of LED lamp strips being placed on the conveying device, the conveying device being used to drive the LED lamp strips to move; a vision sensor arranged on the platform, the vision sensor being used to detect speed information of the LED lamp strips; A plurality of laser welding devices are arranged on the platform, the laser welding device comprises a laser source and a beam shaping device, the beam shaping device is connected with the laser source, the laser source is used for generating laser, and the beam shaping device is used for converting the laser into a plurality of linear light spots and projecting the linear light spots on the tin plates at both ends of the lamp beads on the LED light bar to heat the tin plates at both ends of the lamp beads on the LED light bar; wherein the visual sensor is further used to feed back the speed information of the LED light bar to the laser welding device, the laser source emits a plurality of linear light spots to the welding area through the beam shaping device in the process that the LED light bar reaches the preset position and passes through the welding area, and the laser source is turned off when the LED light bar moves out of the welding area.

[0006] By adopting the technical scheme, compared with the reflow soldering mode, the linear light spots emitted by the laser source and the beam shaping device heat the tin plates at both ends of the lamp beads on the LED light bar, the energy utilization rate of welding is improved, the large-scale heating is avoided to cause thermal damage to other components on the LED light bar, and the service life of the LED light bar is improved. Compared with the laser spot welding mode, the linear light spots emitted by the beam shaping device can heat the tin plates at both ends of the lamp beads on the moving LED light bar through the cooperation of the visual sensor, the laser source and the beam shaping device, the LED light bar is heated and welded while moving, and the welding efficiency is greatly improved.

[0007] Optionally, a plurality of the LED light bars are arranged in parallel and at intervals on the conveying device, and the LED light bars are arranged in a manner that the narrow sides of the LED light bars are parallel to the long sides of the linear light spots and the conveying direction of the conveying device.

[0008] By adopting the technical scheme, the narrow sides of the LED light bars are parallel to the long sides of the linear light spots, so that the linear light spots can accurately scan and heat the tin plates at both ends of the lamp beads on the LED light bar. The LED light bars are arranged in parallel to the conveying direction, so that as many LED light bars as possible can be arranged side by side in the width direction of the conveying device, and the welding of a plurality of LED light bars is realized in sequence, and the welding quantity per unit time is improved.

[0009] Optionally, the light bar welding equipment further comprises a control module, the control module is connected with the visual sensor and the laser welding device, the visual sensor is used to detect the speed information of the LED light bar and feed back the speed information of the LED light bar to the control module, and the control module is used to calculate the time when the LED light bar reaches the preset position according to the speed information of the LED light bar.

[0010] By adopting the technical scheme, the control module performs processing of speed information of the LED light bar and time calculation, so that the function division of the device is more clear. The visual sensor, the control module and the laser welding device are separated, which helps to improve the stability and response speed of the device. By accurately calculating the arrival time, the control module can send a precise trigger signal to the laser welding device, ensuring the success rate and reliability of the mobile welding.

[0011] Optionally, the laser welding device further comprises a spatial light modulator, the spatial light modulator is connected with the light beam shaping device, and the spatial light modulator is used to adjust the intensity of each part of the linear light spot; wherein, in the process of moving of the LED light bar, the spatial light modulator increases the energy intensity of the part of the linear light spot irradiated to the tin disc at both ends of the lamp bead of the LED light bar, and reduces the energy intensity of the part of the linear light spot irradiated to the non-tin disc at both ends of the lamp bead of the LED light bar.

[0012] By adopting the technical scheme, the spatial light modulator can dynamically adjust the energy distribution of the linear light spot, concentrate the energy in the tin disc area at both ends of the lamp bead, and greatly reduce or even close the energy of the non-tin disc area (such as the PCB substrate). Avoiding the waste of laser energy on invalid heating, the heat impact on the PCB substrate is minimized, effectively preventing the substrate from discoloration, deformation or even delamination due to local overheating, and further improving the product quality and reliability. Through software programming, the spatial light modulator can adapt to LED light bars of different specifications and different pad layouts without replacing hardware optical elements, greatly enhancing the flexible production capacity of the device.

[0013] Optionally, the light bar welding device further comprises a rack, the rack is arranged on the platform, the visual sensor is arranged on the rack, the laser welding device further comprises a connecting piece, the connecting piece is arranged on the rack, and the laser source, the light beam shaping device and the spatial light modulator are all arranged on the connecting piece.

[0014] By adopting the above technical scheme, all optical components (laser source, light beam shaping device, spatial light modulator) of the visual sensor and the laser welding device are fixed on the rack, ensuring that the relative position relationship between them is constant, effectively eliminating the positioning error caused by factors such as vibration, thermal expansion and cold contraction, and ensuring long-term working stability and welding precision.

[0015] Optionally, the light bar welding device further comprises a cooling device, the cooling device comprises a supporting plate and a plurality of air blowers, the supporting plate is arranged on the rack, and the air blowers are arranged on the supporting plate and used to blow air to the welded LED light bar.

[0016] By adopting the technical scheme, the forced air cooling of the LED light bar is performed by the air blower after the welding is completed, and the cooling speed of the welding point can be controlled. The rapid and uniform cooling is helpful to form a fine grain structure, thereby improving the mechanical strength and fatigue resistance of the welding point and prolonging the service life of the product.

[0017] Optionally, the light bar welding equipment further comprises a tray, the tray is used for being placed on the conveying device, the tray is used for placing the LED light bar, a recess is arranged on the tray, a plurality of limiting columns are arranged in the recess, a supporting piece is arranged in the recess, a plurality of limiting holes are arranged on the supporting piece, the limiting holes are used for the limiting columns to pass through, and portions of the limiting columns passing through the limiting holes are used for clamping the LED light bar; a plurality of notches are arranged on the side wall of the recess, and the notches are used for taking down the supporting piece.

[0018] By adopting the technical scheme, through the combined structure of the recess, the limiting column, the supporting piece and the limiting hole, each LED light bar can be accurately and firmly fixed at a predetermined position of the tray. The high-repetitive accurate positioning enables the laser to accurately hit the tiny solder pad. When the user needs to take down a plurality of LED light bars from the tray, the supporting piece can be taken down from the notch to take down the plurality of LED light bars at one time, thereby improving the unloading efficiency.

[0019] Optionally, the conveying device comprises a first conveying track and a second conveying track, the first conveying track is used for supporting a first end of the tray, the second conveying track is used for supporting a second end of the tray away from the first end, and a plurality of rollers are arranged on the first conveying track and the second conveying track, and the rollers are used for moving the tray.

[0020] By adopting the technical scheme, the tray is supported and conveyed by the double tracks cooperating with the rollers, so that the tray can always be kept horizontal and stable during movement, inclination and shaking are avoided, and the constant working distance between the laser focal point and the solder pad can be maintained, thereby ensuring the stability of the welding energy and the consistency of the welding point quality.

[0021] Optionally, the lamp strip welding device further comprises a plurality of track adjusting devices, the track adjusting device comprising a sliding rail, a plurality of sliding blocks, a lead screw, a first pusher and a second pusher, the sliding rail being arranged on the platform, the first conveying track and the second conveying track being connected with the sliding blocks, the sliding blocks being in sliding connection with the sliding rail, the first pusher being connected with the first conveying track, the second pusher being connected with the second conveying track, the lead screw being in rotational connection with the first pusher and the second pusher; when the lead screw rotates forward, the first pusher and the second pusher move towards each other to drive the first conveying track and the second conveying track to move towards each other, and when the lead screw rotates reversely, the first pusher and the second pusher move away from each other to drive the first conveying track and the second conveying track to move away from each other.

[0022] By adopting the above technical scheme, the distance between the first conveying track and the second conveying track is adjusted by the lead screw mechanism, so that the same device can be compatible with different width specifications of the tray or the LED lamp strip. When the production line needs to switch to produce different models of products, only the track width needs to be adjusted, without the need to replace the entire conveying system, which greatly improves the utilization rate and the return on investment of the device.

[0023] Optionally, the track adjusting device further comprises a driving motor, the output shaft of the driving motor being connected with the lead screw, the driving motor being used to drive the lead screw to rotate to drive the first conveying track and the second conveying track to move.

[0024] By adopting the above technical scheme, the driving motor adjusts the speed much faster than manual operation, greatly shortening the line switching time when switching products, and the driving motor can realize precise position control through an encoder, etc., ensuring that each adjustment can reach the preset accurate width, avoiding the error of manual adjustment.

[0025] In summary, the present application has the following at least one beneficial technical effect: 1. Compared with the reflow welding method, the present application uses the linear light spot emitted by the laser source and the beam shaping device to heat the tin disc at both ends of the lamp bead on the LED lamp strip, improves the energy utilization rate of welding, avoids the heat damage to other components on the LED lamp strip caused by large-scale heating, and improves the service life of the LED lamp strip. Compared with the laser spot welding method, the cooperation of the visual sensor, the laser source and the beam shaping device enables the linear light spot emitted by the beam shaping device to heat the tin disc at both ends of the lamp bead on the moving LED lamp strip, realizes the welding of the LED lamp strip while moving, and greatly improves the welding efficiency; 2. The narrow side of the LED light bar is parallel to the long side of the linear light spot, ensuring that the linear light spot can accurately scan the tin disc at both ends of the lamp beads on the LED light bar. The placement of the narrow side of the LED light bar parallel to the conveying direction allows for the placement of as many LED light bars as possible in the width direction of the conveying device, enabling the sequential welding of multiple LED light bars and increasing the number of welds per unit of time; 3. The spatial light modulator can dynamically adjust the energy distribution of the linear light spot, concentrating energy on the tin disc area at both ends of the lamp beads while significantly reducing or even turning off the energy in non-tin disc areas (such as the PCB substrate). This avoids wasting laser energy on ineffective heating and minimizes the thermal impact on the PCB substrate, effectively preventing the substrate from discoloring, deforming, or even delaminating due to local overheating, further improving product quality and reliability. Through software programming, the spatial light modulator can adapt to LED light bars of different specifications and pad layouts without the need to replace hardware optical elements, greatly enhancing the flexibility of the device's production capacity; 4. After welding, the blower forces air cooling on the LED light bar, allowing control over the cooling speed of the weld points. Rapid and uniform cooling helps to form fine grain structures, thereby improving the mechanical strength and fatigue resistance of the weld points and extending the product's service life. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a structural schematic diagram of a first angle of a light bar welding device according to an embodiment of the present application; Figure 2 is an enlarged schematic diagram of area A in Figure 1 Figure 3 is a structural schematic diagram of a second angle of a light bar welding device according to an embodiment of the present application; Figure 4 is an enlarged schematic diagram of area B in Figure 3 Figure 5 is a structural schematic diagram of a tray in a light bar welding device according to an embodiment of the present application; Figure 6 is an exploded schematic diagram of a tray in a light bar welding device according to an embodiment of the present application.

[0027] ​​Explanation of reference signs: 10, platform; 20, rack; 30, conveying device; 31, first conveying track; 32, second conveying track; 33, roller; 40, tray; 41, groove; 41a, limiting column; 42, notch; 43, supporting piece; 43a, limiting hole; 50, visual sensor; 60, laser welding device; 61, connecting piece; 62, laser source; 63, beam shaping device; 64, spatial light modulator; 70, cooling device; 71, supporting plate; 72, air blower; 80, track adjusting device; 81, sliding rail; 82, sliding block; 83, driving motor; 84, screw rod; 85, first pushing piece; 86, second pushing piece. DETAILED DESCRIPTION

[0028] The following will be described in detail below with reference to the accompanying drawings. Figures 1-6 The application is further described in detail.

[0029] The embodiment of the application discloses a lamp bar welding equipment.

[0030] Figure 1 is a structural schematic diagram of a first angle of the lamp bar welding equipment according to the embodiment of the application. Refer to Figure 1The lamp bar welding device comprises a platform 10, a rack 20, a conveying device 30, a tray 40, a visual sensor 50, a plurality of laser welding devices 60, a cooling device 70, a plurality of track adjusting devices 80 and a control module. The track adjusting devices 80 are arranged on the platform 10, the conveying device 30 is arranged on the track adjusting devices 80, and the conveying device 30 is used for conveying the tray 40. The tray 40 is used for placing a plurality of LED lamp bars, and the track adjusting devices 80 are used for adjusting the width of the conveying device 30 to adapt to different sizes of the tray 40. The rack 20 is also arranged on the platform 10, the visual sensor 50 and the laser welding device 60 are arranged on the rack 20, and the control module is connected with the visual sensor 50 and the laser welding device 60. The visual sensor 50 is used for detecting speed information of the LED lamp bar and feeding back the speed information of the LED lamp bar to the control module. The control module is used for calculating the time when the LED lamp bar reaches a preset position according to the speed information of the LED lamp bar. In the process that the LED lamp bar reaches the preset position and passes through a welding area, the control module controls the laser welding device 60 to emit a plurality of linear light spots to the LED lamp bar on the tray 40 to heat tin discs at both ends of the lamp beads of the LED lamp bar. The control module is usually a single-chip microcomputer or an industrial computer and has data processing and operation functions. The control module is connected with the visual sensor 50 and the laser welding device 60 through a data line, the control module receives the speed information emitted by the visual sensor 50, sends control information to the laser welding device 60 after calculation, and realizes precise control of welding time. The cooling device 70 is arranged on the rack 20, and the cooling device 70 is used for cooling the tin discs at both ends of the LED lamp bar after welding.

[0031] A plurality of the LED lamp bars are arranged in parallel and at intervals on the tray 40, and the LED lamp bars are arranged in a manner that narrow edges of the LED lamp bars are parallel to long edges of the linear light spots and a conveying direction of the conveying device 30.

[0032] The conveying device 30 includes a first conveying track 31 and a second conveying track 32. The first conveying track 31 supports a first end of the pallet 40, and the second conveying track 32 supports a second end of the pallet 40 away from the first end. Both the first conveying track 31 and the second conveying track 32 are equipped with multiple rollers 33, which drive the pallet 40 to move. The rollers 33 are typically cylindrical, made of wear-resistant rubber or plastic, and are mounted on the first conveying track 31 and the second conveying track 32 via bearings, allowing for flexible rotation. Alternatively, the rollers 33 can be replaced with a chain drive mechanism, with protrusions on the chain adapted to the pallet 40 to drive its movement. The rotation of the rollers 33 can be driven by a motor via a belt or chain drive, thus enabling the movement of the pallet 40.

[0033] The cooling device 70 includes a support plate 71 and multiple blowers 72. The support plate 71 is mounted on the frame 20, and the blowers 72 are mounted on the support plate 71. The blowers 72 are used to blow air onto the welded LED light strips. The support plate 71 is a flat structure made of metal or plastic and is fixed to the frame 20 by bolts or welding. The blowers 72 are centrifugal or axial flow blowers, fixed to the support plate 71 by screws, and their air outlets are aligned with the conveying device 30 below. When the conveying device 30 moves the tray 40 to below the blowers 72, the blowers 72 blow air onto the LED light strips to quickly reduce the temperature of the welded area and improve the welding quality.

[0034] Figure 2 yes Figure 1 An enlarged view of area A in the middle. (Refer to...) Figure 2 The laser welding device 60 includes a connector 61, a laser source 62, a beam shaping device 63, and a spatial light modulator 64. The laser source 62, the beam shaping device 63, and the spatial light modulator 64 are all mounted on the connector 61. The laser source 62 is connected to the beam shaping device 63, and the beam shaping device 63 is connected to the spatial light modulator 64. The laser source 62 generates laser light, and the beam shaping device 63 converts the laser light into multiple parallel linear light spots. For example, in this embodiment, two parallel linear light spots can be formed, corresponding to the solder pads on both sides of the LED bead. The spatial light modulator 64 adjusts the energy intensity of each part of the linear light spot, and the linear light spot heats the solder pads on both sides of the LED bead on the LED strip.

[0035] The laser source 62 can be a solid laser or a gas laser, capable of generating a high-energy laser beam. The beam shaping device 63 is usually composed of optical elements such as lenses, mirrors, etc. By refraction and reflection of laser, the laser beam is shaped into multiple linear light spots. The beam shaping device 63 can also use diffractive optical elements to achieve beam shaping. The laser source 62 and the beam shaping device 63 are connected by optical fibers or optical channels to ensure that the laser can be accurately transmitted to the beam shaping device 63 for shaping. The spatial light modulator 64 is usually a liquid crystal spatial light modulator, which adjusts the intensity of each part of the linear light spot by controlling the orientation of the liquid crystal molecules to change the phase and amplitude of the light. A micro-electro-mechanical system spatial light modulator can also be used. The spatial light modulator 64 is connected to the beam shaping device 63 through an optical interface, which can adjust the intensity of the shaped linear light spot in real time to adapt to different welding needs.

[0036] Figure 3 is a second angle structure schematic diagram of a lamp bar welding equipment according to an embodiment of the present application, Figure 4 is Figure 3 is an enlarged schematic diagram of the B area in Figure 3 and Figure 4 The track adjusting device 80 includes a sliding rail 81, a plurality of sliding blocks 82, a driving motor 83, a lead screw 84, a first pushing piece 85 and a second pushing piece 86. The sliding rail 81 is in sliding connection with the sliding blocks 82, the first conveying track 31 and the second conveying track 32 are both connected with the sliding blocks 82, and the sliding rail 81 is arranged on the platform 10. The sliding rail 81 can be a linear guide rail made of metal material. The sliding blocks 82 are adapted to the sliding rail 81 and can smoothly slide on the sliding rail 81.

[0037] The first pushing piece 85 is connected with the first conveying track 31, the second pushing piece 86 is connected with the second conveying track 32, and the first pushing piece 85 and the second pushing piece 86 are both in rotary connection with the lead screw 84. The lead screw 84 can be a trapezoidal lead screw or a ball screw, which is connected with the first pushing piece 85 and the second pushing piece 86 through bearings. When the lead screw 84 rotates forward, the first pushing piece 85 and the second pushing piece 86 move towards each other, and when the lead screw 84 rotates reversely, the first pushing piece 85 and the second pushing piece 86 move away from each other. The driving motor 83 is arranged on the platform 10, the output shaft of the driving motor 83 is connected with the lead screw 84, and the driving motor 83 is used to drive the rotation of the lead screw 84, and drive the movement of the first pushing piece 85 and the second pushing piece 86, so as to drive the first conveying track 31 and the second conveying track 32 to move away from or move towards each other.

[0038] Figure 5is a schematic view of the structure of a tray in a lamp bar welding device according to an embodiment of the present application, Figure 6 is an exploded schematic view of a tray in a lamp bar welding device according to an embodiment of the present application. Refer to Figure 5 and Figure 6 The tray 40 is provided with a groove 41, the sidewall of the groove 41 is provided with a plurality of notches 42, the groove 41 is provided with a plurality of limiting columns 41a, the limiting columns 41a are used to clamp the LED lamp bar. The groove 41 is provided with a supporting piece 43, the supporting piece 43 is provided with a plurality of limiting holes 43a, the limiting holes 43a are used for the limiting columns 41a to pass through, the notches 42 are used for the user to take out the supporting piece 43 from the groove 41. When the supporting piece 43 is placed in the groove 41, the part of the limiting column 41a passing through the limiting hole 43a clamps the LED lamp bar. When it is needed to take off the LED lamp bar from the limiting column 41a, the user takes off the supporting piece 43 from the notch 42, and the supporting piece 43 will lift the LED lamp bar from the limiting column 41a, so as to take off the LED lamp bar.

[0039] The groove 41 is rectangular, the size can be designed according to the specification of the LED lamp bar, and a plurality of LED lamp bars can be accommodated. The limiting column 41a is generally cylindrical, made of metal, and vertically fixed at the bottom of the groove 41. The limiting column 41a can also be a square column. The supporting piece 43 is flat, generally made of metal, the limiting holes 43a on the supporting piece 43 correspond to the limiting columns 41a one by one, and the limiting column 41a can stably clamp the LED lamp bar after passing through the limiting hole 43a, preventing the LED lamp bar from shaking during the conveying process.

[0040] The implementation principle of the lamp bar welding device according to an embodiment of the present application is as follows: compared with the reflow welding method, the linear light spot emitted by the laser source 62 and the beam shaping device 63 heats the tin disc at both ends of the lamp bead on the LED lamp bar, improves the energy utilization rate of welding, avoids the heat damage to other components on the LED lamp bar caused by large-scale heating, and improves the service life of the LED lamp bar. Compared with the laser spot welding method, the cooperation of the visual sensor 50, the laser source 62 and the beam shaping device 63 enables the linear light spot emitted by the beam shaping device 63 to heat the tin disc at both ends of the lamp bead on the moving LED lamp bar, realizes the welding of the LED lamp bar while moving, and greatly improves the welding efficiency.

[0041] The above are the preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A light bar welding apparatus characterized by, The application relates to a LED lamp strip welding device. The device comprises a platform (10), a conveying device (30) arranged on the platform (10), a plurality of LED lamp strips placed on the conveying device (30), the conveying device (30) being used to drive the LED lamp strips to move, a visual sensor (50) arranged on the platform (10), the visual sensor (50) being used to detect speed information of the LED lamp strips, a plurality of laser welding devices (60) arranged on the platform (10), the laser welding device (60) comprising a laser source (62) and a beam shaping device (63), the beam shaping device (63) being connected with the laser source (62), the laser source (62) being used to generate laser, the beam shaping device (63) being used to convert the laser into a plurality of linear light spots and project the linear light spots on tin plates at both ends of lamp beads on the LED lamp strips so as to heat the tin plates at both ends of the lamp beads on the LED lamp strips, wherein the visual sensor (50) is further used to feed back the speed information of the LED lamp strips to the laser welding device (60), the laser source (62) emits a plurality of linear light spots to the welding area through the beam shaping device (63) in the process that the LED lamp strips reach a preset position and pass through the welding area, and the laser source (62) is turned off when the LED lamp strips move out of the welding area. The plurality of LED lamp strips are placed in parallel on the conveying device (30), and the LED lamp strips are placed in a mode that narrow edges of the LED lamp strips are parallel to long edges of the linear light spots and a conveying direction of the conveying device (30). The device further comprises a control module connected with the visual sensor (50) and the laser welding device (60), the visual sensor (50) is used to detect speed information of the LED lamp strips and feed back the speed information of the LED lamp strips to the control module, and the control module is used to calculate a time when the LED lamp strips reach a preset position according to the speed information of the LED lamp strips. The laser welding device (60) further comprises a spatial light modulator (64) connected with the beam shaping device (63), the spatial light modulator (64) is used to adjust intensity of each part of the linear light spots, wherein, in the process that the LED lamp strips move, the spatial light modulator (64) increases energy intensity of a part of the linear light spots irradiated on the tin plates at both ends of the lamp beads of the LED lamp strips and decreases energy intensity of a part of the linear light spots irradiated on non-tin plates at both ends of the lamp beads of the LED lamp strips.

2. The light bar welding apparatus of claim 1, wherein, ​ 3. The light bar welding apparatus of claim 2, wherein, ​ 4. The light bar welding apparatus of claim 1, wherein, ​ 5. The light bar welding apparatus of claim 4, wherein, The machine frame (20) is arranged on the platform (10), the visual sensor (50) is arranged on the machine frame (20), the laser welding device (60) further comprises a connecting piece (61), the connecting piece (61) is arranged on the machine frame (20), and the laser source (62), the beam shaping device (63) and the spatial light modulator (64) are arranged on the connecting piece (61).

6. The light bar welding apparatus of claim 5, wherein, The cooling device (70) comprises a supporting plate (71) and a plurality of air blowers (72), the supporting plate (71) is arranged on the machine frame (20), and the air blowers (72) are arranged on the supporting plate (71) and used for blowing air to the welded LED light bar.

7. The light bar welding apparatus of claim 2, wherein, The tray (40) is used for placing the LED light bar on the conveying device (30), the recess (41) is provided with a plurality of limiting columns (41a), the recess (41) is provided with a supporting piece (43), the supporting piece (43) is provided with a plurality of limiting holes (43a), the limiting holes (43a) are used for the limiting columns (41a) to pass through, and the limiting columns (41a) passing through the limiting holes (43a) are used for clamping the LED light bar.

8. The light bar welding apparatus of claim 7, wherein, The conveying device (30) comprises a first conveying track (31) and a second conveying track (32), the first conveying track (31) is used for supporting a first end of the tray (40), the second conveying track (32) is used for supporting a second end of the tray (40) away from the first end, and the first conveying track (31) and the second conveying track (32) are provided with a plurality of rollers (33), and the rollers (33) are used for driving the tray (40) to move.

9. The light bar welding apparatus of claim 8, wherein, It also includes multiple track adjustment devices (80), each track adjustment device (80) including a slide rail (81), multiple sliders (82), a lead screw (84), a first pusher (85), and a second pusher (86). The slide rail (81) is disposed on the platform (10). The first conveyor track (31) and the second conveyor track (32) are both connected to the sliders (82). The sliders (82) are slidably connected to the slide rail (81). The first pusher (85) is connected to the first conveyor track (31), and the second pusher (86) is connected to the second conveyor track (32). The feed rail (32) is connected, and the lead screw (84) is rotatably connected to the first pusher (85) and the second pusher (86); wherein, when the lead screw (84) rotates in the forward direction, the first pusher (85) and the second pusher (86) move closer to each other, so as to drive the first feed rail (31) and the second feed rail (32) to move closer to each other; when the lead screw rotates in the reverse direction, the first pusher (85) and the second pusher (86) move further away from each other, so as to drive the first feed rail (31) and the second feed rail (32) to move further away from each other.

10. The light bar welding apparatus of claim 9, wherein, The track adjustment device (80) also includes a drive motor (83), the output shaft of which is connected to the lead screw (84). The drive motor (83) is used to drive the lead screw (84) to rotate, thereby moving the first conveying track (31) and the second conveying track (32).

Images