Anti-interference laser welding visual detection light source device

Abstract

The utility model discloses an anti -interference's laser welding vision detection light source device, including the shell, the shell inside is equipped with the heat dissipation seat, is equipped with the PCB board on the heat dissipation seat, is equipped with a plurality of linear arrangement's LED lamp pearl on the PCB board, LED lamp pearl one side is equipped with the photosensitive sensor, one side of heat dissipation seat is equipped with the heat dissipation component, and the other side is equipped with the diffuser plate, the diffuser plate one end is equipped with the filter glass, the utility model provides an anti -interference's laser welding vision detection light source device, in the laser welding process, through the infrared laser beam of filter glass effective scattering carries out the anti -interference to guarantee the normal work of laser welding vision detection light source device of the utility model, thereby guarantees the normal work of laser welding, in addition, the laser welding vision detection light source device of the utility model does not need frequent shutdown in the use process, and production efficiency is high, and the manufacturing cost is low, and the heat dissipation efficiency is high.

Description

Technical Field

[0001] This utility model relates to the technical field of laser welding visual inspection light source, and in particular to an anti-interference laser welding visual inspection light source device. Background Technology

[0002] In a laser welding visual inspection system, the visual inspection light source needs to provide uniform illumination during the inspection phase, while the laser welding head (1070±10nm wavelength) needs to be quickly positioned for welding after inspection. There are two main ways to install the visual inspection light source and the laser welding head: First, the visual inspection light source is directly above, with the laser welding head to its side; second, the laser welding head is directly above, with the visual inspection light source to its side (e.g., Chinese invention patent CN112894133B, entitled "A Laser Welding System and Weld Point Location Extraction Method"). Regardless of the installation method, the laser welding head and the visual inspection light source are physically close together.

[0003] Currently, in laser welding visual inspection systems, the visual inspection light source contains a photosensitive sensor made of silicon-based photosensitive material. The photosensitive sensor is used to sense the light intensity of the visual inspection light source and to determine whether it is under normal lighting conditions.

[0004] Therefore, in laser welding visual inspection systems, the visual inspection light source has the following defects: After the laser welding head is detected by the visual inspection light source, it performs rapid positioning welding. During this process, the laser welding head emits a high-power infrared laser beam (1070±10nm band). This high-power infrared laser beam will be scattered on the surface of the object to be inspected, causing the visual inspection light source to receive the scattered high-power infrared laser beam. This infrared laser beam has huge energy and a band of 1070±10nm. It will produce a photoelectric response effect on the photosensitive sensor made of silicon-based photosensitive material (silicon response range 190-1100nm). As a result, the scattered high-power infrared laser beam will excite the photosensitive sensor to generate an abnormal photocurrent loop, triggering a short circuit false alarm of the visual inspection light source, resulting in frequent laser welding shutdowns.

[0005] In summary, current laser welding vision inspection systems have the drawback that during the laser welding process, the infrared laser beam emitted by the laser welding head interferes with the normal operation of the vision inspection light source, causing the vision inspection light source to frequently report errors, thus leading to frequent laser welding shutdowns.

[0006] (Of course, in the field of laser welding visual inspection, industry professionals will use the following methods to address the above-mentioned shortcomings:)

[0007] 1. Timing control method: The visual inspection light source is turned on during inspection and turned off during welding, but this method has low production efficiency;

[0008] 2. Physical isolation method: A fixed baffle is used to separate the visual inspection light source and the laser welding head, and a movable baffle is used to block and move away from the bottom of the visual inspection light source (blocking it during welding). However, this method results in bulky inspection equipment and low production efficiency.

[0009] 3. Electromagnetic shielding method: Electromagnetic shielding cannot block high-power infrared laser beams;

[0010] 4. Circuit modification method: The light source components and circuits of the visual inspection light source are designed and modified to ensure that the high-power infrared laser beam does not damage the light source components. However, this type of modification is extremely costly and has poor compatibility.

[0011] In conclusion, these methods still cannot completely prevent the infrared laser beam emitted by the laser welding head from interfering with the normal operation of the visual inspection light source at a low cost and without affecting production efficiency. Utility Model Content

[0012] The purpose of this invention is to overcome the above-mentioned defects in the prior art and provide an anti-interference laser welding visual inspection light source device. It blocks the infrared laser beam emitted by the laser welding head from passing through through a filter, while allowing the visible light emitted by the LED beads to pass through, thereby avoiding interference from the infrared laser beam emitted by the laser welding head with the normal operation of the laser welding visual inspection light source device of this invention.

[0013] To achieve the above objectives, this utility model provides an anti-interference laser welding visual inspection light source device, including a housing, a heat sink installed inside the housing, a PCB board installed on the heat sink, a plurality of linearly arranged LED beads installed on the PCB board, a photosensitive sensor installed on one side of each LED bead, a heat dissipation component installed on one side of the heat sink, and a diffuser plate installed on the other side, with a filter installed at one end of the diffuser plate.

[0014] Preferably, one end of the heat sink has a flat surface, and the PCB board is attached to the flat surface.

[0015] Preferably, the other end of the heat sink is provided with a plurality of linearly arranged heat dissipation fins.

[0016] Preferably, the heat dissipation assembly includes a plurality of linearly arranged cooling fans.

[0017] Preferably, a power cord electrically connected to the PCB board is connected to one side of the outer casing.

[0018] Preferably, the PCB board, the diffuser, and the filter are all rectangular.

[0019] Preferably, the outer casing includes a base plate, a first side plate mounted on one side of the base plate, a second side plate mounted on the other side of the base plate, a rear side plate mounted on the rear side of the base plate, and a top plate disposed opposite to the base plate.

[0020] Preferably, a first slot is formed inside the base plate, the first side plate, the top plate, and the second side plate, and the heat sink is engaged in the first slot. A second slot is formed at the front end between the base plate, the first side plate, the top plate, and the second side plate, and the diffuser plate and the filter are both engaged in the second slot.

[0021] Preferably, the heat dissipation component is attached to the rear side plate, and ventilation holes are provided on the rear side of the bottom plate, the rear side plate, and the rear side of the top.

[0022] Preferably, the LED beads and the photosensitive sensor are electrically connected to the PCB board.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0024] 1. This utility model includes LED beads, a photosensitive sensor, a diffuser plate, and a filter;

[0025] When the anti-interference laser welding visual inspection light source device of this utility model is used for inspection, the LED lamp beads emit light -> the diffuser plate diffuses the light -> the filter allows the visible light band emitted by the LED lamp beads to pass through, the LED lamp beads emit light -> the photosensitive sensor detects the light intensity, thereby ensuring the quality of the inspection image;

[0026] In existing laser welding heads, rapid positioning welding is performed after inspection. At this time, the high-power infrared laser beam emitted by the laser welding head is diffused through the surface of the object to be welded. The diffused infrared laser beam is blocked by a filter, preventing it from penetrating into the shell. This ensures the normal detection of the photosensitive sensor and avoids frequent errors in the laser welding visual inspection light source device of this invention, thus avoiding frequent shutdowns of laser welding due to frequent errors.

[0027] 2. This utility model includes a PCB board, a heat sink, and a heat dissipation component. The heat sink dissipates heat from the PCB board, and the heat dissipation component dissipates heat from the heat sink, thereby achieving efficient heat dissipation and ensuring the normal operation of the laser welding visual inspection light source device of this utility model.

[0028] 3. In summary, the anti-interference laser welding visual inspection light source device provided by this utility model effectively scatters the infrared laser beam through a filter during the laser welding process, thereby ensuring the normal operation of the laser welding visual inspection light source device and ensuring normal laser welding. In addition, the laser welding visual inspection light source device of this utility model does not require frequent shutdowns during use, has high production efficiency, low manufacturing cost, and high heat dissipation efficiency. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of an anti-interference laser welding visual inspection light source device provided in an embodiment of this utility model;

[0031] Figure 2 This is an exploded structural diagram of an anti-interference laser welding visual inspection light source device (top plate omitted) provided in an embodiment of this utility model;

[0032] Figure 3 This is a schematic diagram of the structure of the heat sink, PCB board, diffuser and filter provided in the embodiment of this utility model;

[0033] Figure 4 This is an exploded structural diagram of the outer shell provided in an embodiment of the present invention;

[0034] Figure 5 This is a side sectional view of an anti-interference laser welding visual inspection light source device provided in an embodiment of this utility model.

[0035] The diagram includes:

[0036] 1. Outer shell; 11. Base plate; 12. Top plate; 13. First side plate; 14. Second side plate; 15. Rear side plate; 17. First slot; 18. Second slot; 19. Ventilation hole; 2. Heat sink; 21. Flat surface; 22. Heat sink fins; 3. PCB board; 4. Heat dissipation assembly; 40. Cooling fan; 5. Diffuser plate; 6. Filter; 7. Power cord. Detailed Implementation

[0037] The technical solution of this embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiment is one embodiment of the present invention, and not all embodiments thereof. Based on this embodiment of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Please see Figures 1 to 5 The present invention provides an anti-interference laser welding visual inspection light source device, including a housing 1, a heat sink 2 installed inside the housing 1, a PCB board 3 installed on the heat sink 2, a plurality of linearly arranged LED beads (LED beads are prior art and are not shown in the drawings) installed on the PCB board 3, a photosensitive sensor (photosensitive sensor is prior art and is not shown in the drawings) installed on one side of the LED beads, a heat dissipation component 4 installed on one side of the heat sink 2, and a diffuser plate 5 installed on the other side, with a filter 6 installed at one end of the diffuser plate 5.

[0039] Filter 6 is coated with a hard infrared cutoff film, which can block the infrared laser beam emitted by the laser welding head from passing through, while allowing the visible light emitted by the LED beads to pass through.

[0040] The heat sink 2 has a flat surface 21 at one end, and the PCB board 3 is attached to the flat surface 21.

[0041] The other end of the heat sink 2 is provided with several linearly arranged heat dissipation fins 22.

[0042] The heat dissipation component 4 includes several linearly arranged cooling fans 40.

[0043] A power cable 7, which is electrically connected to the PCB board 3, is connected to one side of the outer casing 1.

[0044] The LED beads and the photosensitive sensor are electrically connected to PCB board 3 respectively.

[0045] PCB board 3, diffuser board 5 and filter 6 are all rectangular.

[0046] The outer casing 1 includes a base plate 11, a first side plate 13 mounted on one side of the base plate 11, a second side plate 14 mounted on the other side of the base plate 11, a rear side plate 15 mounted on the rear side of the base plate 11, and a top plate 12 disposed opposite to the base plate 11.

[0047] A first slot 17 is provided inside the base plate 11, the first side plate 13, the top plate 12, and the second side plate 14. The heat sink 2 is snapped into the first slot 17, and the heat sink 2, the base plate 11, and the top plate 12 are fixed by bolts. A second slot 18 is provided at the front end between the base plate 11, the first side plate 13, the top plate 12, and the second side plate 14. The diffuser plate 5 and the filter 6 are both snapped into the second slot 18. The second slot 18 ensures that the diffuser plate and the filter 6 are installed stably.

[0048] The heat dissipation component 4 is attached to the rear side plate 15, and ventilation holes 19 are provided on the rear side of the bottom plate 11, the rear side plate 15, and the rear side of the top. The ventilation holes 19 improve the heat dissipation efficiency of the heat dissipation component 4.

[0049] The technical advantages of the anti-interference laser welding visual inspection light source device according to an embodiment of this utility model are as follows:

[0050] When the anti-interference laser welding visual inspection light source device of this utility model is used for inspection, the LED lamp bead emits light -> the diffuser plate 5 diffuses the light -> the filter 6 allows the visible light band emitted by the LED lamp bead to pass through, the LED lamp bead emits light -> the photosensitive sensor detects the light intensity, thereby ensuring the quality of the inspection image.

[0051] During the inspection process, the heat sink 2 dissipates heat from the PCB board 3, and the heat dissipation component 4 dissipates heat from the heat sink 2, thereby achieving efficient heat dissipation and ensuring the normal operation of the laser welding visual inspection light source device of this utility model.

[0052] In existing laser welding heads, rapid positioning welding is performed after inspection. At this time, the high-power infrared laser beam emitted by the laser welding head is diffused through the surface of the object to be welded. The diffused infrared laser beam is blocked by the filter 6, which prevents it from penetrating into the housing 1, thereby ensuring the normal detection work of the photosensitive sensor and avoiding frequent errors in the laser welding visual inspection light source device of this utility model, thus avoiding frequent shutdowns of laser welding due to frequent errors.

[0053] To elaborate further, its specific technical effects are as follows:

[0054] (1) The core advantages of this utility model:

[0055] In this invention, a filter 6 for a specific wavelength band is integrated into the light-emitting surface to achieve:

[0056] Precise spectral cutting: blocks the penetration of infrared laser beams at 1070±20nm (covering the laser band);

[0057] High visible light transmittance: Maintaining >90% transmittance in the 400-700nm visible light band to ensure high-quality detection and imaging;

[0058] Non-contact protection: Eliminates interference at the source of the optical path without modifying the internal circuitry.

[0059] (2) False alarm rate is reduced to zero:

[0060] ① Completely block the excitation of the photosensitive sensor by the infrared laser beam, eliminate short circuit false alarms, and reduce the production line downtime rate by 100%.

[0061] (3) Compatibility and cost advantages

[0062] ①No need to add mechanical baffle shielding structure, saving equipment space;

[0063] ② Avoid cycle time loss caused by timing control, and improve production efficiency by 15%+;

[0064] ③ The cost of filter 6 is only 5%-10% of that of traditional modification solutions, and the manufacturing cost is low.

[0065] (4) Dual guarantee of optical performance:

[0066] Optical coating technology is applied using filter 6 (for example, filter 6 is a hard infrared cutoff film), simultaneously achieving:

[0067] ①Resistant to laser interference: Cutoff depth in the 1070nm band > OD4 (transmittance < 0.01%).

[0068] ② Eye protection and safety: Filters out invisible infrared light to avoid the risk of retinal damage to operators.

[0069] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An anti-interference laser welding visual inspection light source device, comprising a housing (1), characterized in that, The outer casing (1) is equipped with a heat sink (2), and a PCB board (3) is mounted on the heat sink (2). A number of linearly arranged LED beads are mounted on the PCB board (3). A photosensitive sensor is mounted on one side of the LED beads. A heat dissipation component (4) is mounted on one side of the heat sink (2), and a diffuser plate (5) is mounted on the other side. A filter (6) is mounted on one end of the diffuser plate (5).

2. The anti-interference laser welding visual inspection light source device according to claim 1, characterized in that, The heat sink (2) has a flat surface (21) at one end, and the PCB board (3) is attached to the flat surface (21).

3. The anti-interference laser welding visual inspection light source device according to claim 1, characterized in that, The other end of the heat sink (2) is provided with several linearly arranged heat dissipation fins (22).

4. The anti-interference laser welding visual inspection light source device according to claim 1, characterized in that, The heat dissipation assembly (4) includes a plurality of linearly arranged cooling fans (40).

5. The anti-interference laser welding visual inspection light source device according to claim 1, characterized in that, The outer casing (1) is connected to a power cord (7) that is electrically connected to the PCB board (3) on one side.

6. The anti-interference laser welding visual inspection light source device according to claim 1, characterized in that, The PCB board (3), the diffuser (5), and the filter (6) are all rectangular.

7. The anti-interference laser welding visual inspection light source device according to claim 1, characterized in that, The outer casing (1) includes a bottom plate (11), a first side plate (13) mounted on one side of the bottom plate (11), a second side plate (14) mounted on the other side of the bottom plate (11), a rear side plate (15) mounted on the rear side of the bottom plate (11), and a top plate (12) disposed opposite to the bottom plate (11).

8. The anti-interference laser welding visual inspection light source device according to claim 7, characterized in that, A first slot (17) is provided inside the base plate (11), the first side plate (13), the top plate (12), and the second side plate (14). The heat sink (2) is engaged in the first slot (17). A second slot (18) is provided at the front end between the base plate (11), the first side plate (13), the top plate (12), and the second side plate (14). The diffuser plate (5) and the filter (6) are both engaged in the second slot (18).

9. The anti-interference laser welding visual inspection light source device according to claim 7, characterized in that, The heat dissipation component (4) is attached to the rear side plate (15), and ventilation holes (19) are provided on the rear side of the bottom plate (11), the rear side plate (15) and the rear side of the top.

10. The anti-interference laser welding visual inspection light source device according to claim 1, characterized in that, The LED beads and photosensitive sensor are electrically connected to the PCB board (3).

Images