A hand-held laser welding device with a built-in water-cooled circulation cavity

Abstract

The utility model relates to handheld laser welding device, including host computer and welding torch, is equipped with water cooling circulating device in host computer. The welding torch contains handle, gun body and gun head, and the inside of gun body is equipped with optical path lens group, and the left and right sides of lens group are equipped with water cooling circulating cavity. The handle detachable installation is in the bottom of gun body, and its inside has filter assembly, the top of filter assembly is detachably connected with gun body, the bottom extends to the outside of handle, and detachably connected inlet pipe and outlet pipe, and filter assembly is also divided into water inlet area and backwater area. Two groups of connecting channels are equipped in the inside of gun body, and the import of two water cooling circulating cavities is connected with water inlet area export through corresponding channel, and the cavity export is connected with backwater area import through corresponding channel. The design filters cooling water through filter assembly, avoids that the impurity blocks up water cooling circulating cavity, weakens the cooling effect, and additionally is equipped with detachable maintenance board, and forms circulating cavity with sink cooling water channel, is convenient for cleaning, prevents that the water scale is generated and adheres cavity inner wall with water temperature rise.

Description

Technical Field

[0001] This utility model relates to the field of laser welding equipment technology, specifically to a handheld laser welding device with a built-in water-cooled circulation cavity. Background Technology

[0002] Handheld laser welding devices are portable equipment that uses high-energy-density laser beams to join metal materials. They are characterized by flexibility, high efficiency, excellent welding quality, and ease of operation, and have rapidly gained popularity in industrial manufacturing, repair, and maintenance in recent years. The equipment consists of a main unit and a handheld welding torch. Laser energy is transmitted to the torch via optical fiber. The focused laser beam has an energy density as high as 10⁴-10⁶ W / cm², instantly melting the metal surface to form a molten pool. Upon cooling, metallurgical bonding is achieved. It can form deep and narrow welds with a penetration depth of 0.5-5 mm, making it particularly suitable for welding medium and thick plates.

[0003] Significant heat generation is a problem during laser welding: on the one hand, the transmission of the high-energy laser beam inside the welding torch directly leads to an increase in the torch's temperature; on the other hand, the welding area itself is at a high temperature, and a significant temperature gradient field easily forms above it, further exacerbating the torch's temperature rise. If the device operates continuously for a long time, the sustained high temperature generated by the laser operation will not only significantly shorten the lifespan of the optical path lenses inside the torch, but may also cause burns to operators due to overheating of the torch casing, endangering operational safety.

[0004] To address the aforementioned overheating issue, while existing technologies utilize a water-cooled circulation chamber within the welding device for heat dissipation, two key drawbacks remain: First, the water-cooled circulation chamber is a closed, non-openable structure without a cooling water filter. Impurities in the cooling water easily enter the chamber and deposit, clogging the water flow channels and reducing the cooling water flow rate over time, leading to a significant decrease in heat dissipation efficiency. Second, the cooling water temperature rises after heat exchange, easily forming scale on the inner wall of the water-cooled circulation chamber. Because the chamber cannot be opened, the scale is difficult to clean, and its long-term adhesion further hinders heat conduction, exacerbating the cooling effect and ultimately failing to meet the heat dissipation requirements for stable long-term operation of the device. Utility Model Content

[0005] The purpose of this invention is to overcome the above-mentioned technical problems and provide a handheld laser welding device with a built-in water-cooled circulation cavity.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a handheld laser welding device with a built-in water-cooled circulation cavity, comprising a main unit and a welding torch. The main unit is equipped with a water-cooled circulation device. The welding torch includes a handle, a torch body, and a torch head. An optical path lens assembly is installed inside the torch body. Water-cooled circulation cavities are provided on the left and right sides of the optical path lens assembly inside the torch body. The handle is detachably installed at the bottom of the torch body and has a filter assembly inside. The top of the filter assembly is detachably connected to the torch body, and the bottom extends to the outside of the handle and is detachably connected to an inlet pipe and an outlet pipe. The filter assembly includes an inlet water area and a return water area. The torch body has two sets of connecting channels for inlet and return water. The inlets of the two water-cooled circulation cavities are connected to the outlets of the inlet water area through corresponding connecting channels, and the outlets of the two water-cooled circulation cavities are connected to the inlets of the return water area through corresponding connecting channels.

[0007] Furthermore, the gun body has a groove on the left and right side walls, and a maintenance plate is detachably installed inside. Cooling water channels are provided on both the maintenance plate and the inner wall of the groove. The two cooling water channels form a water-cooled circulation cavity. A sealing strip is provided on the inner wall of the groove along the corresponding cooling water channel, and the maintenance plate is in close contact with the sealing strip.

[0008] Furthermore, the water-cooled circulation cavity has an S-shaped folding structure.

[0009] Furthermore, a heat insulation layer is provided between the water inlet area and the water return area of ​​the filter assembly.

[0010] Furthermore, the inlet pipe and the outlet pipe are bundled together to form a water supply pipeline, and both the inlet pipe and the outlet pipe are wrapped with heat insulation cotton.

[0011] Furthermore, the filter assembly has a mounting plate on top and is connected to the gun body through the mounting plate. The outlet of the water inlet zone and the inlet of the water return zone are located on the mounting plate. The filter assembly has a mounting head at the bottom and is connected to the water supply pipe through the mounting head. The inlet of the water inlet zone and the outlet of the water return zone are located on the mounting head.

[0012] Furthermore, the mounting head is provided with external threads, and a threaded cap is movably installed on the top of the water supply pipe. The threaded cap is threadedly connected to the mounting head, so that the end of the water supply pipe is tightly abutted against the outer end of the mounting head.

[0013] The beneficial effects of this utility model are as follows: By integrating a filter component inside the handle, the cooling water is filtered before entering the water-cooling circulation chamber, thereby avoiding impurities in the cooling water from clogging the water-cooling circulation chamber and reducing the cooling effect.

[0014] By setting up a removable inspection plate, it forms a cooling water circulation chamber with the two cooling water channels opposite to the trough, which further facilitates the cleaning of the cooling water circulation chamber and prevents scale formation and adhesion to the inner wall of the chamber due to water temperature rise. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a handheld laser welding device with a built-in water-cooled circulation cavity according to the present invention;

[0016] Figure 2 This is a schematic diagram of the welding torch in this utility model;

[0017] Figure 3 This is a schematic diagram of the welding torch under the perspective of the inspection plate in this utility model;

[0018] Figure 4 This is an exploded view of the welding torch in this utility model;

[0019] Figure 5 yes Figure 4 Enlarged view of section A;

[0020] Figure 6 This is an exploded view of the welding torch in this utility model;

[0021] Figure 7 This is a cross-sectional view of the water conveyance pipeline in this utility model;

[0022] Figure 8 This is a cross-sectional view of the filter component in this utility model.

[0023] 1. Main unit; 2. Welding torch; 3. Handle; 4. Torch body; 5. Torch head; 6. Filter assembly; 7. Water-cooled circulation chamber; 8. Inlet pipe; 9. Outlet pipe; 10. Inlet area; 11. Return area; 12. Connection channel; 13. Settling tank; 14. Inspection plate; 15. Cooling water channel; 16. Sealing strip; 17. Insulation layer; 18. Water supply pipe; 19. Mounting plate; 20. Mounting head; 21. Threaded cap; 22. Optical path lens assembly. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0025] Embodiments of this utility model: such as Figure 1-8As shown, a handheld laser welding device with a built-in water-cooled circulation cavity includes a main unit 1 and a welding torch 2. The main unit 1 adopts the existing handheld laser welding device main unit and has an internal water-cooled circulation device (including a water tank, circulation pump, pipes, heat dissipation module, etc.). The welding torch 2 includes a handle 3, a torch body 4, and a torch head 5. The torch head 5 adopts the existing handheld laser welding device torch head 5. Depending on the application scenario, the torch head 5 has different shapes and is detachably installed at the front end of the torch body 4. An optical path lens group 22 is installed inside the torch body 4. The optical path lens group 22 adopts the existing handheld laser welding device optical path lens group (its function is to realize the precise transmission, energy control, optical path adjustment, and contamination protection of the laser, directly determining the power stability, spot quality, and welding effect of the laser). A QBH connector assembly is provided at the rear end of the torch body 4 for connecting a fiber laser to achieve stable transmission, rapid connection, and precise positioning of high-power laser.

[0026] Inside the gun body 4, water-cooled circulation chambers 7 are provided on the left and right sides of the optical path lens group 22. The water-cooled circulation chambers 7 are as follows: Figure 3 , 4 The S-shaped folding structure shown in Figures 5 and 6; the handle 3 is detachably mounted on the bottom of the gun body 4, and has a filter assembly 6 inside. The top of the filter assembly 6 is detachably connected to the gun body 4, and the bottom extends to the outside of the handle 3, and is detachably connected to an inlet pipe 8 and an outlet pipe 9; Figure 8 As shown, the filter assembly 6 includes an inlet water zone 10 and a return water zone 11, with a heat insulation layer 17 between them; Figure 5 , 6 As shown, the gun body 4 has two sets of connecting channels 12 (connecting channels 12 are T-shaped structures) inside for water inlet and water return. The inlets of the two water-cooled circulation chambers 7 are connected to the outlets of the water inlet area 10 through the corresponding connecting channels 12, and the outlets of the two water-cooled circulation chambers 7 are connected to the inlets of the water return area 11 through the corresponding connecting channels 12.

[0027] Through the above structure, the S-shaped folding structure of the water-cooled circulation chamber 7 can extend the flow path of the cooling water in the chamber, increase the heat exchange area and heat exchange time between the cooling water and the gun body 4 and the optical path lens group 22, significantly improve the heat dissipation efficiency, and ensure that the optical path lens group 22 is always at a suitable working temperature; the detachable handle 3 can replace the filter material in the filter assembly to ensure the filtration effect; the water inlet area 10 is connected to the inlet of the water-cooled circulation chamber 7 through the connecting channel 12, and the water return area 11 is connected to the outlet of the water-cooled circulation chamber 7.

[0028] like Figure 2 , 3As shown in Figures 4, 5, and 6, the gun body 4 has a groove 13 on its left and right side walls, and a maintenance plate 14 is detachably installed inside. The maintenance plate 14 and the inner wall of the groove 13 are both provided with cooling water channels 15. The two cooling water channels 15 form a water-cooled circulation cavity 7. The inner wall of the groove 13 is provided with a sealing strip 16 along the corresponding cooling water channel 15, and the maintenance plate 14 is in close contact with the sealing strip 16.

[0029] It is worth noting that the sealing strip 16 is made of a high-temperature resistant material, such as high-temperature resistant silicone rubber. Bolt holes are provided at all four corners of the inspection plate 14 and the four corners of the trough, and the plates are fixed together by bolts. When the inspection plate 14 is fixed to the gun body 4 by bolts, it will be tightly pressed against the sealing strip 16, forming a reliable seal.

[0030] like Figure 7 As shown, the inlet pipe 8 and the outlet pipe 9 are bundled together to form a water supply pipe 18, and both the inlet pipe 8 and the outlet pipe 9 are wrapped with heat insulation cotton.

[0031] With the above structure, the two pipes are bundled together to avoid pipe clutter, and the insulation cotton prevents heat exchange between the water in the outlet pipe 9 and the water in the inlet pipe 8, thus ensuring heat dissipation.

[0032] like Figure 4 , 6 As shown, the filter assembly 6 has a mounting plate 19 on top and is connected to the gun body 4 through the mounting plate 19. The outlet of the water inlet zone 10 and the inlet of the water return zone 11 are set on the mounting plate 19. The filter assembly 6 has a mounting head 20 at the bottom and is connected to the water supply pipe 18 through the mounting head 20. The inlet of the water inlet zone 10 and the outlet of the water return zone 11 are set on the mounting head 20.

[0033] It is worth noting that the mounting plate 19 has threaded holes at all four corners of the mounting area connected to the gun body 4, and the two are fixed by bolts. The outlet of the water inlet area 10 and the inlet of the water return area 11 are provided with sealing gaskets. The mounting head 20 is provided with insertion grooves corresponding to the inlet of the water inlet area 10 and the outlet of the water return area 11. The ends of the water inlet pipe 8 and the water outlet pipe 9 are inserted into the insertion grooves, and the insertion grooves are provided with sealing gaskets.

[0034] like Figure 4 , 6 As shown, the mounting head 20 is provided with external threads, and a threaded cap 21 is movably installed on the top of the water supply pipe 18 (the end of the water supply pipe 18 is provided with an outer extension edge, the threaded cap 21 is provided with a through hole, the water supply pipe 18 passes through the through hole, and the diameter of the through hole is smaller than the diameter of the outer extension edge). The threaded cap 21 is threadedly connected to the mounting head 20, so that the end of the water supply pipe 18 is tightly abutted against the outer end of the mounting head 20.

[0035] When the device is working, the water cooling circulation device of the main unit 1 is activated, pressurizing the low-temperature cooling water and delivering it to the inlet pipe 8. The cooling water enters the inlet area 10 of the filter assembly 6 through the inlet pipe 8 (the inlet area 10 has a built-in filter screen to filter impurities in the water). Subsequently, the cooling water enters a set of connecting channels 12 of the gun body 4 through the interface of the mounting plate 19, and is divided into the left and right water cooling circulation chambers 7. When the cooling water flows in the S-shaped water cooling circulation chamber 7, it exchanges heat with the gun body 4 and the optical path lens group 22, absorbing the heat generated by the laser operation. After completing the heat exchange, the high-temperature cooling water flows out from the outlet of the water cooling circulation chamber 7, enters the return water area 11 of the filter assembly 6 through another set of connecting channels 12, and then flows back to the water cooling circulation device of the main unit 1 through the outlet pipe 9. After the high-temperature cooling water is cooled down in the main unit, it enters the next cycle again, continuously providing cooling for the optical path lens group 22 to ensure stable operation of the device.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0038] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A handheld laser welding device with a built-in water-cooled circulation cavity, comprising a main unit (1) and a welding torch (2), wherein the main unit (1) is provided with a water-cooled circulation device, characterized in that: The welding torch (2) includes a handle (3), a torch body (4), and a torch head (5). An optical path lens group (22) is installed inside the torch body (4). Water-cooled circulation chambers (7) are provided on the left and right sides of the optical path lens group (22) inside the torch body (4). The handle (3) is detachably installed at the bottom of the torch body (4) and has a filter assembly (6) inside. The top of the filter assembly (6) is detachably connected to the torch body (4), and the bottom extends to the outside of the handle (3). It is detachably connected to an inlet pipe (8) and an outlet pipe (9). The filter assembly (6) includes an inlet area (10) and a return area (11). The torch body (4) has two sets of connecting channels (12) for inlet and return water. The inlets of the two water-cooled circulation chambers (7) are connected to the outlets of the inlet area (10) through the corresponding connecting channels (12), and the outlets of the two water-cooled circulation chambers (7) are connected to the inlets of the return area (11) through the corresponding connecting channels (12).

2. The handheld laser welding device with a built-in water-cooled circulation cavity according to claim 1, characterized in that: The gun body (4) has a groove (13) on its left and right side walls, and a maintenance plate (14) is detachably installed inside. The maintenance plate (14) and the inner wall of the groove (13) are both provided with cooling water channels (15). The two cooling water channels (15) form a water-cooled circulation cavity (7). The inner wall of the groove (13) is provided with a sealing strip (16) along the corresponding cooling water channel (15). The maintenance plate (14) and the sealing strip (16) are in close contact.

3. A handheld laser welding device with a built-in water-cooled circulation cavity according to claim 2, characterized in that: The water-cooled circulation cavity (7) has an S-shaped folding structure.

4. A handheld laser welding device with a built-in water-cooled circulation cavity according to claim 1, characterized in that: A heat insulation layer (17) is provided between the water inlet area (10) and the water return area (11) of the filter assembly (6).

5. A handheld laser welding device with a built-in water-cooled circulation cavity according to claim 1, characterized in that: The inlet pipe (8) and outlet pipe (9) are bundled together to form a water supply pipe (18), and the outside of both the inlet pipe (8) and outlet pipe (9) is wrapped with heat insulation cotton.

6. A handheld laser welding device with a built-in water-cooled circulation cavity according to claim 5, characterized in that: The filter assembly (6) has a mounting plate (19) on top and is connected to the gun body (4) through the mounting plate (19). The outlet of the water inlet zone (10) and the inlet of the water return zone (11) are set on the mounting plate (19). The filter assembly (6) has a mounting head (20) at the bottom and is connected to the water supply pipe (18) through the mounting head (20). The inlet of the water inlet zone (10) and the outlet of the water return zone (11) are set on the mounting head (20).

7. A handheld laser welding device with a built-in water-cooled circulation cavity according to claim 6, characterized in that: The mounting head (20) is provided with an external thread, and a threaded cap (21) is movably installed on the top of the water supply pipe (18). The threaded cap (21) is threadedly connected to the mounting head (20), so that the end of the water supply pipe (18) is tightly abutted against the outer end of the mounting head (20).

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