Dust removal device and laser welding device

Abstract

The invention provides a dust removal device and a laser welding device, and relates to the technical field of laser welding, and the dust removal device comprises a shell and an air curtain generation device. The shell comprises a laser beam channel with an opening, the laser beam channel is used for allowing a laser beam output by the laser generating device to penetrate through, and the laser beam welds a to-be-welded part through the opening. The air curtain generating device is arranged on the shell and configured to output airflow towards the opening, the airflow penetrates through the laser beam channel to form an air curtain, and the air curtain is at least used for isolating the laser generating device from welding slag generated in the welding process. The air curtain is an annular air curtain, and the annular air curtain is annularly arranged in the circumferential direction of the laser beam and avoids the laser beam. According to the dust removal device provided by the embodiment of the invention, the problem that the laser generating device is polluted due to splashing of welding slag such as metal beads can be solved, so that the service life and the welding quality of the laser welding device are improved.

Description

Technical Field

[0001] This application relates to the field of laser welding technology, and in particular to a dust removal device and a laser welding device. Background Technology

[0002] Laser welding technology is a type of fusion welding that uses a laser beam as an energy source to impact the joint of the workpiece to achieve the welding purpose. The laser beam is easy to focus, align, and be guided by optical instruments, and can be placed at an appropriate distance from the workpiece for easy operation.

[0003] Laser welding is used in multiple processes during battery production, such as connecting the adapter plate to the top cover, connecting the top cover to the casing, and connecting the sealing pins. During laser welding, molten metal droplets and other weld slag are inevitably generated, and there is a problem of molten metal droplets and other weld slag spattering and contaminating the laser generator, thus affecting the lifespan of the laser welding equipment and the welding quality. Summary of the Invention

[0004] In view of this, this application aims to provide a dust removal device and a laser welding device that can improve the problem of metal molten beads and other welding slag spatter contaminating the laser generating device, thereby improving the service life of the laser welding device and the welding quality.

[0005] To achieve the above objectives, this application provides a dust removal device applied to a laser welding apparatus, the dust removal device comprising: A housing, the housing including a laser beam channel with an opening for a laser beam output from a laser generator to pass through, the laser beam welding the workpiece through the opening; An air curtain generating device is disposed in the housing and configured to output airflow toward the opening. The airflow passes through the laser beam channel to form an air curtain, which is at least used to isolate the laser generating device from the welding slag generated during the welding process. The air curtain is an annular air curtain, which is arranged around the circumference of the laser beam and avoids the laser beam.

[0006] The dust removal device provided in this application embodiment is equipped with an air curtain generator. The air curtain generator is configured to output airflow towards the opening. The airflow passes through the laser beam channel to form an air curtain. In other words, during the welding process, the air curtain can blow the welding slag, fumes, etc. that are splashed towards the laser generator toward the opening. The air curtain can isolate the laser generator from the welding slag, fumes, etc. In this way, the problem of welding slag, fumes, etc., such as molten metal beads, which are splashed and contaminate the laser generator can be improved, so as to form a good protective effect on the laser generator, thereby improving the service life of the laser welding device and the welding quality.

[0007] In addition, the annular air curtain can avoid the laser beam, thus preventing the air curtain from affecting the welding effect of the laser welding device. Furthermore, the annular air curtain is positioned around the laser beam, which helps to improve the isolation effect of the air curtain on the laser generating device and welding slag, dust, etc., thereby improving the protection effect on the laser generating device.

[0008] In one embodiment, the air curtain generating device includes an air source and a jetting structure in communication with the air source, the jetting structure including at least one nozzle facing the opening.

[0009] The gas source is used to provide gas so that the gas enters the injection structure and is ejected through the nozzle toward the opening to form an air curtain.

[0010] In one embodiment, the number of nozzles is multiple, and the multiple nozzles are arranged at circumferential intervals along the laser beam channel.

[0011] By setting multiple nozzles at circumferential intervals in the laser beam channel, the multiple nozzles spray airflow to form an annular air curtain. The annular air curtain is arranged around the laser beam, which not only avoids the laser beam but also provides good protection for the laser generating device.

[0012] In one embodiment, the nozzle is a continuous annular slit structure.

[0013] This helps improve the uniformity of the annular air curtain and helps isolate the laser generator, welding slag, dust, etc.

[0014] In one embodiment, the centerline of the nozzle is inclined relative to the centerline of the laser beam channel.

[0015] In this way, the radial coverage of the annular air curtain in the laser beam channel can be increased, improving the isolation effect between the laser generating device and welding slag, dust, etc., thereby forming a good protective effect for the laser generating device.

[0016] In one embodiment, the tilt angle between the centerline of the nozzle and the centerline of the laser beam channel is 25°-45°.

[0017] This allows the air curtain to avoid the laser beam while also getting as close to it as possible, thereby increasing the radial coverage of the annular air curtain in the laser beam channel and thus improving the protection effect on the laser generating device.

[0018] In one embodiment, the tilt angle of the centerline of the nozzle relative to the centerline of the laser beam channel is less than or equal to the maximum tilt angle of the laser beam relative to the centerline of the laser beam channel.

[0019] In this way, the air curtain can avoid the laser beam, minimizing the impact of the air curtain on the welding quality of the laser beam.

[0020] In one embodiment, the gas source is configured to provide an inert gas.

[0021] In this way, an inert gas curtain can be formed, which not only isolates the laser generator and welding slag and provides good protection for the laser generator, but also allows the inert gas to be blown into the area to be welded through the opening. By covering the area to be welded with inert gas, the entire welding environment can be covered with inert protective gas, which can, to a certain extent, prevent the oxidation of the workpiece during the high-temperature welding process, thereby improving the welding quality and welding stability.

[0022] In one embodiment, the air curtain generating device is disposed at the end of the housing away from the opening and is arranged around the outer periphery of the laser generating device.

[0023] By placing the air curtain generator at the end of the housing away from the opening, the air curtain generator can avoid the laser beam, and the size of the air curtain in the extension direction of the laser beam channel can be increased as much as possible, thereby improving the protection effect on the laser generator. By placing the air curtain generator around the outer periphery of the laser generator, it is convenient to control the distance between the air curtain and the laser beam, and while making it easy for the air curtain generator to avoid the laser beam, it is also easy to form an annular air curtain.

[0024] In one embodiment, a mounting portion is provided at the end of the housing away from the opening, the mounting portion being used for assembly with the laser generating device.

[0025] By placing the laser generator at the end of the laser beam channel away from the opening, it is possible to minimize the splashing of welding slag, dust, and other contaminants onto the laser generator, thus providing good protection for it.

[0026] In one embodiment, the dust removal device further includes a clamping member with an air passage, the clamping member being disposed at one end of the housing near the opening, the clamping member being configured to clamp the workpiece to be welded, and the air passage exposing the area to be welded of the workpiece.

[0027] In other words, the laser beam can enter the gas passage through the opening to weld the area to be welded. The addition of clamping components further improves the welding quality.

[0028] In one embodiment, an air inlet channel is provided through the side wall of the clamping member, and the air outlet of the air inlet channel is connected to the air passage. In a cross section perpendicular to the extending direction of the air passage, the orientation of the air outlet is inclined relative to the line connecting the center of the air outlet and the center of the air passage, so that the airflow flowing out of the air outlet flows along the inner wall of the air passage.

[0029] By tilting the air outlet relative to the line connecting the center of the air outlet and the center of the air passage, the airflow flowing out of the air outlet flows along the inner wall of the air passage. This creates a vortex inside the air passage, which disturbs the welding slag, fumes, etc., thus facilitating the rapid discharge of welding slag, fumes, etc., from the end of the air passage away from the outlet.

[0030] Through the combined effect of the air curtain generated by the air curtain generator and the vortex generated by the air passage, the air curtain can blow the welding slag that splashes towards the laser generator toward the opening. The vortex generated by the air passage helps to quickly discharge welding slag, fumes and other dust from the end of the air passage away from the opening. The combined effect of the two further enhances the protection effect of the laser generator, and improves the service life of the laser welding device and the welding quality.

[0031] In one embodiment, the dust removal device further includes a dust removal chamber, which is disposed on the side of the clamping member away from the housing. The dust removal chamber is provided with a dust removal cavity and an exhaust channel communicating with the dust removal cavity, and the dust removal cavity is connected to the exhaust channel.

[0032] In this way, welding slag, fumes and other dust in the air passage can be discharged into the dust removal chamber under the action of gravity or airflow, and then discharged to the outside through the exhaust passage.

[0033] In one embodiment, the dust removal device further includes a negative pressure channel connected to the laser beam channel.

[0034] By setting up a negative pressure channel, welding slag and dust from the laser beam channel can be drawn into the negative pressure channel and then discharged or collected. This prevents the overflow of welding slag and dust generated during the welding process, thus offering good practicality. Furthermore, by forming both the laser beam channel and the negative pressure channel on the housing, there is no need for a separate negative pressure pipe, which simplifies the structure of the dust removal device and improves assembly efficiency.

[0035] A second aspect of this application provides a laser welding apparatus, the laser welding apparatus comprising: The dust removal device described above; A laser generating device is configured to output light rays that pass through the laser beam channel to weld the workpiece to be welded.

[0036] Since the laser welding device includes the dust removal device provided above, it can improve the problem of metal molten beads and other welding slag, fumes and other spatter contaminating the laser generating device, so as to form a good protective effect on the laser generating device, thereby improving the service life of the laser welding device and the welding quality. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the structure of a laser welding apparatus according to some embodiments of this application; Figure 2 This is a schematic diagram illustrating the cooperation between an air curtain generating device and a laser generating device in some embodiments of this application; Figure 3 This is a top view of an air curtain generating device according to some embodiments of this application; Figure 4 This is a front view of an air curtain generating device according to some embodiments of this application.

[0038] Explanation of reference numerals in the attached figures: 10. Housing; 11. Laser beam channel; 12. Opening; 13. Negative pressure channel; 20. Air curtain generator; 21. Nozzle; 22. Positive pressure cavity; 30. Clamping component; 31. Air passage; 32. Air inlet channel; 33. Air outlet; 40. Dust removal chamber; 41. Dust removal cavity; 42. Exhaust channel; 100. Dust removal device; 200. Laser generator; 210. Laser beam; 300. Part to be welded; 1000. Laser welding device. Detailed Implementation

[0039] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this application; the terms “comprising” and “having”, and any variations thereof, in the specification and the foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0041] In the description of the embodiments of this application, technical terms such as "first," "second," "third," and "fourth" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0042] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. Unless otherwise specified, all embodiments and optional embodiments of this application may be combined with each other to form new technical solutions. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will understand, explicitly and implicitly, that the embodiments described herein can be combined with other embodiments. Unless otherwise specified, all technical features and optional technical features of this application may be combined with each other to form new technical solutions.

[0043] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0044] In the description of the embodiments of this application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0045] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0046] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0047] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "projection" refers to an orthographic projection in which parallel projection lines are perpendicular to the projection plane.

[0048] With the development of clean energy, more and more devices are using electricity as their driving force, leading to the rapid development of power batteries, such as lithium-ion batteries, which can store a large amount of electrical energy and can be repeatedly charged and discharged. These power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace, robotics, and many other fields.

[0049] In battery production, laser welding is used in multiple processes, such as connecting the adapter plate to the top cover, connecting the top cover to the casing, and connecting the sealing pins. During laser welding, molten metal droplets and other welding slag are inevitably generated. Since the laser generator and the laser beam channel are connected without isolation or protection measures, there is a risk of molten metal droplets and other welding slag splashing and contaminating the laser generator, thus affecting the lifespan of the laser welding equipment and the welding quality.

[0050] Research has shown that if a dust removal device is equipped with an air curtain generator, the air curtain generator will output airflow towards the opening. The airflow will pass through the laser beam channel inside the housing to form an air curtain. The air curtain can blow the welding slag that splashes toward the laser generator toward the opening. The air curtain can isolate the laser generator and the welding slag, thereby improving the problem of welding slag and dust splashing and contaminating the laser generator, and thus improving the service life and welding quality of the laser welding device.

[0051] Based on this design concept, this application provides a dust removal device applied to a laser welding apparatus. The dust removal device includes a housing and an air curtain generating device. The housing includes a laser beam channel with an opening, through which a laser beam output from the laser generating device passes, welding the workpiece to be welded. The air curtain generating device is disposed in the housing and configured to output airflow toward the opening. The airflow passes through the laser beam channel to form an air curtain, which at least isolates the laser generating device from the welding slag generated during the welding process. The air curtain is an annular air curtain, surrounding the laser beam and avoiding it.

[0052] The structure of the dust removal device will be described in detail below with reference to the accompanying drawings.

[0053] Please see Figure 1 This application provides a laser welding apparatus 1000, which includes a laser generator 200 and a dust removal device 100 according to any embodiment of this application. The laser generator 200 is configured to output a laser beam 210, which passes through a laser beam channel 11 to weld the workpiece 300 to be welded.

[0054] As an example, the laser generating device 200 includes, but is not limited to, a galvanometer.

[0055] As an example, the component to be welded 300 can be a battery. During operation, the laser beam 210 is aligned with the area to be welded on the battery to perform welding.

[0056] It is understood that the laser welding apparatus 1000 provided in this application embodiment is not limited to welding batteries, but is also applicable to other types of welded parts.

[0057] Please see Figures 1 to 4 This application provides a dust removal device 100, which includes a housing 10 and an air curtain generator 20. The housing 10 includes a laser beam channel 11 with an opening 12 for a laser beam 210 output from a laser generator 200 to pass through, and the laser beam 210 welds the workpiece 300 through the opening 12. The air curtain generator 20 is disposed in the housing 10 and is configured to output airflow toward the opening 12. The airflow passes through the laser beam channel 11 to form an air curtain, which at least isolates the laser generator 200 from the welding slag generated during the welding process.

[0058] As an example, the laser generator 200 is coaxially arranged with the housing 10, so that the laser beam 210 output by the laser generator 200 can pass through the laser beam channel 11.

[0059] For example, please refer to Figure 1 The laser beam channel 11 extends along the height direction of the housing 10, and the bottom wall of the housing 10 forms an opening 12.

[0060] The air curtain generator 20 is configured to output airflow toward the opening 12, that is, the airflow direction is toward the opening 12, which is beneficial to blow the welding slag that splashes toward the laser generator 200 toward the opening 12.

[0061] In some embodiments, please refer to Figures 1 to 4 The housing 10 has a mounting part at the end away from the opening 12, which is used to assemble with the laser generating device 200.

[0062] In other words, the laser generating device 200 is located at the end of the laser beam channel 11 away from the opening 12, that is, the laser generating device 200 and the opening 12 are located at both ends of the laser beam channel 11 along the extension direction.

[0063] By placing the laser generator 200 at the end of the laser beam channel 11 away from the opening 12, welding slag, dust, and other debris can be prevented from splashing onto the laser generator 200 as much as possible, thus providing good protection for the laser generator 200.

[0064] Since the air curtain generator 20 outputs airflow toward the opening 12, the airflow passes through the laser beam channel 11 to form an air curtain. In other words, an air curtain can be formed between the laser generator 200 and the opening 12, and the airflow direction of the air curtain is toward the opening 12. In this way, the air curtain can blow the welding slag, dust, etc. that are splashed toward the laser generator 200 toward the opening 12, so as to form a good protective effect on the laser generator 200.

[0065] The specific assembly method of the mounting section and the laser generator 200 is not limited here, including but not limited to snap-fit, threaded connection, plug-in connection, etc.

[0066] The dust removal device 100 provided in this application embodiment is equipped with an air curtain generator 20. The air curtain generator 20 is configured to output airflow toward the opening 12. The airflow passes through the laser beam channel 11 to form an air curtain. That is, during the welding process, the air curtain can blow the welding slag, dust, etc. that splashed toward the laser generator 200 toward the opening 12. The air curtain can isolate the laser generator 200 from the welding slag, dust, etc. In this way, the problem of welding slag, fumes, etc., splashing and contaminating the laser generator 200 can be improved, so as to form a good protective effect on the laser generator 200, thereby improving the service life and welding quality of the laser welding device 1000.

[0067] In some embodiments, please refer to Figure 1 The air curtain is an annular air curtain, which is arranged around the circumference of the laser beam 210 and avoids the laser beam 210.

[0068] In this way, the annular air curtain can avoid the laser beam 210, thereby preventing the air curtain from affecting the welding effect of the laser welding device 1000. Furthermore, the annular air curtain is arranged around the laser beam 210, which helps to improve the isolation effect of the air curtain on the laser generating device 200 and welding slag, dust, etc., thereby improving the protection effect on the laser generating device 200.

[0069] A ring-shaped air curtain can form a uniform and complete air curtain barrier.

[0070] As an example, the air curtain generator 20, the laser generator 200, and the housing 10 are all coaxially arranged.

[0071] It should be noted that the cross-sectional shape of the annular air curtain can be the same as the cross-sectional shape of the laser beam 210, such as both being circular. Of course, it can also be the same as the cross-sectional shape of the laser beam channel 11, such as both being circular, elliptical, or polygonal.

[0072] As an example, the center of the laser beam 210 is approximately located at the center of the laser beam channel 11.

[0073] It should be noted that the specific location of the air curtain generating device 20 is not limited here.

[0074] In some embodiments, please refer to Figures 1 to 4 The air curtain generating device 20 is located at the end of the housing 10 away from the opening 12 and is arranged around the outer periphery of the laser generating device 200.

[0075] By placing the air curtain generator 20 at the end of the housing 10 away from the opening 12, the air curtain generator 20 can avoid the laser beam 210, and the size of the air curtain in the extension direction of the laser beam channel 11 can be increased as much as possible, thereby improving the protection effect on the laser generator 200. By placing the air curtain generator 20 around the outer periphery of the laser generator 200, it is convenient to control the distance between the air curtain and the laser beam 210, and at the same time, it is convenient for the air curtain generator 20 to avoid the laser beam 210, and it is also convenient to form an annular air curtain.

[0076] The air curtain generating device 20 is arranged around the outer periphery of the laser generating device 200. It is possible that the air curtain generating device 20 and the laser generating device 200 are not connected, and the air curtain generating device 20 and the laser generating device 200 are respectively connected to the housing 10. Alternatively, the air curtain generating device 20 and the laser generating device 200 can be connected to the housing 10 at the same time.

[0077] In some embodiments, please refer to Figures 2 to 4 The air curtain generating device 20 includes an air source and a spray structure connected to the air source. The spray structure includes at least one nozzle 21 facing the opening 12. This structure is simple and the air curtain is easy to control.

[0078] As an example, opening 12 is located at the bottom of housing 10, and nozzle 21 faces opening 12 to generate a downward-spraying annular air curtain.

[0079] The gas source is used to provide gas so that the gas enters the injection structure and is injected through the nozzle 21 toward the opening 12 to form an air curtain.

[0080] As an example, the injection structure includes an annular air distribution pipe, one end of which is connected to an air source and the other end forms a nozzle 21, or is connected to a nozzle having a nozzle 21.

[0081] There are various specific structures for the jetting mechanism.

[0082] In some embodiments, please refer to Figures 2 to 4 There are multiple nozzles 21, which are spaced apart circumferentially along the laser beam channel 11.

[0083] By setting multiple nozzles 21 at circumferential intervals in the laser beam channel 11, the multiple nozzles 21 eject airflow to jointly form an annular air curtain. The annular air curtain is arranged around the laser beam 210, which provides good protection for the laser generating device 200 while avoiding the laser beam 210.

[0084] The number of nozzles 21 can be adjusted according to requirements.

[0085] In some embodiments, the nozzle 21 is a continuous annular slit structure.

[0086] The nozzle 21 is a continuous annular slit that extends along the entire circumference of the spray structure without interruption or splicing. This helps to improve the uniformity of the annular air curtain and effectively isolates the laser generator 200 from welding slag, dust, and other contaminants.

[0087] In other embodiments, the nozzle 21 is a continuous annular slit structure, and the spray structure further includes multiple spacer walls that are spaced apart circumferentially along the annular slit structure. That is, the annular slit structure is divided into multiple sub-ports by the spacer walls.

[0088] In some embodiments, please refer to Figure 4 The injection structure also includes a positive pressure chamber 22, through which the air source is connected to the nozzle 21.

[0089] In this way, the gas from the gas source can first flow into the positive pressure chamber 22, and then be diverted into each nozzle 21 and ejected.

[0090] In some embodiments, please refer to Figure 4 The centerline of the nozzle 21 is set at an angle relative to the centerline of the laser beam channel 11.

[0091] The centerline of nozzle 21 is as follows Figure 4 As shown in the diagram, the center line of laser beam channel 11 is as follows: Figure 4 N is shown.

[0092] It should be noted that, from the air curtain generator 20 to the opening 12 (along the laser beam channel 11 towards the opening 12), the cross section of the laser beam 210 along the extension direction perpendicular to the laser beam channel 11 is gradually narrowed, that is, the cross section of the laser beam 210 along the extension direction perpendicular to the laser beam channel 11 gradually decreases.

[0093] By tilting the centerline of the nozzle 21 relative to the centerline of the laser beam channel 11, the cross-section of the annular gas curtain gradually narrows along the direction perpendicular to the extension direction of the laser beam channel 11 from the gas curtain generator 20 to the opening 12 (along the laser beam channel 11 towards the opening 12). This increases the radial coverage of the annular gas curtain within the laser beam channel 11, improving the isolation effect between the laser generator 200 and welding slag, dust, etc., thus providing excellent protection for the laser generator 200.

[0094] In some embodiments, please refer to Figure 4 The tilt angle A between the centerline of nozzle 21 and the centerline of laser beam channel 11 is 25°-45°.

[0095] The tilt angle of the center line of the nozzle 21 relative to the center line of the laser beam channel 11 is any one of 25°, 26°, 27°, 28°, 29°, 30°, 31°, 32°, 33°, 35°, 36°, 38°, 40°, 41°, 42°, 43°, 45° or any value between two of them.

[0096] By setting the tilt angle of the center line of the nozzle 21 relative to the center line of the laser beam channel 11 to 25°-45°, the air curtain can avoid the laser beam 210 while also getting as close to the laser beam 210 as possible, thereby increasing the radial coverage of the annular air curtain in the laser beam channel 11 and thus improving the protection effect on the laser generating device 200.

[0097] In some embodiments, please refer to Figure 1 The tilt angle A of the center line of nozzle 21 relative to the center line of laser beam channel 11 is less than or equal to the maximum tilt angle B of laser beam 210 relative to the center line of laser beam channel 11.

[0098] In this way, the air curtain can avoid the laser beam 210, minimizing the impact of the air curtain on the welding quality of the laser beam 210.

[0099] Here, the maximum tilt angle of the laser beam 210 relative to the center line of the laser beam channel 11 generally refers to the tilt angle between the edge of the laser beam 210 and the center line of the laser beam channel 11.

[0100] In some embodiments, the gas source is configured to provide an inert gas.

[0101] In this way, an inert gas curtain can be formed, which not only isolates the laser generator 200 from the welding slag and provides good protection for the laser generator 200, but also allows the inert gas to be blown into the area to be welded through the opening 12. By covering the area to be welded with inert gas, the entire welding environment can be covered with inert protective gas, which can, to a certain extent, prevent the oxidation of the workpiece 300 during the high-temperature welding process, thereby improving the welding quality and welding stability.

[0102] For example, inert gases include, but are not limited to, nitrogen and argon.

[0103] In some embodiments, please refer to Figure 1 The dust removal device 100 also includes a clamping member 30 with an air passage 31. The clamping member 30 is located at one end of the housing 10 near the opening 12. The clamping member 30 is configured to clamp the workpiece 300 to be welded, and the air passage 31 exposes the area of ​​the workpiece 300 to be welded.

[0104] The clamping component 30 is used to clamp the workpiece 300 to be welded during welding. The gas passage 31 exposes the area of ​​the workpiece 300 to be welded, meaning that the laser beam 210 can enter the gas passage 31 through the opening 12 to weld the area to be welded. The clamping component 30 further improves the welding quality.

[0105] As an example, the clamping element 30 can be a cover plate, which has an air passage 31 extending through it along the thickness direction.

[0106] As an example, the opening 12 at the bottom of the laser beam channel 11 is connected to the air passage 31 on the clamping member 30 to form a slag collection channel.

[0107] In some embodiments, a protective gas channel is provided through the side wall of the clamping member 30, which connects to the gas passage 31. In this way, the protective gas can be blown towards the area to be welded through the protective gas channel, ensuring that the protective gas evenly covers the area. This allows the entire welding environment to be covered with an inert protective gas, which can, to some extent, prevent weld oxidation during high-temperature welding, thereby improving welding quality and welding stability.

[0108] The specific type of shielding gas is not limited here; it can be an inert gas. Inert gases can, to some extent, prevent weld oxidation during high-temperature welding, thereby improving welding quality and stability.

[0109] For example, the protective gas includes, but is not limited to, nitrogen and argon.

[0110] In some embodiments, please refer to Figure 1An air inlet channel 32 is provided through the side wall of the clamping member 30, and the air outlet 33 of the air inlet channel 32 is connected to the air passage 31. In a cross section perpendicular to the extension direction of the air passage 31, the orientation of the air outlet 33 is inclined relative to the line connecting the center of the air outlet 33 and the center of the air passage 31, so that the airflow flowing out of the air outlet 33 flows along the inner side wall of the air passage 31.

[0111] As an example, the orientation of the air outlet 33 is approximately tangent to the inner wall of the air passage 31.

[0112] It should be noted that the approximate tangency allows for certain manufacturing or other errors. The error refers to the angle of inclination between the orientation of the air inlet 33 and the tangent of the inner wall of the air passage 31, which does not exceed 10°.

[0113] In an embodiment where the cross-section of the air passage 31 is rectangular, the air outlet 33 of the air inlet passage 32 is located near the end of the adjacent side, and the orientation of the air outlet 33 is parallel to the adjacent side.

[0114] The airflow exiting through the outlet 33 flows along the inner wall of the air passage 31, so that the clamping member 30 functions similarly to a cyclone separator structure.

[0115] By tilting the orientation of the air outlet 33 relative to the line connecting the center of the air outlet 33 and the center of the air passage 31, the airflow flowing out of the air outlet 33 flows along the inner wall of the air passage 31. In this way, a vortex can be formed inside the air passage 31, which will disturb the welding slag, fumes and other dust in the air passage 31, thereby facilitating the rapid discharge of welding slag, fumes and other dust from the end of the air passage 31 away from the outlet 12.

[0116] Through the combined effect of the air curtain generated by the air curtain generator 20 and the vortex generated by the air passage 31, the air curtain can blow the welding slag that splashes toward the laser generator 200 toward the opening 12. The vortex generated by the air passage 31 helps to quickly discharge welding slag, fumes and other dust from the end of the air passage 31 away from the opening 12. The combined effect of the two further enhances the protection effect of the laser generator 200 and improves the service life and welding quality of the laser welding device 1000.

[0117] As an example, a tangential air intake pipe can be provided on the side wall of the clamping member 30, and an air intake channel 32 is formed inside the tangential air intake pipe.

[0118] In some embodiments, please refer to Figure 1 The dust removal device 100 also includes a dust removal chamber 40, which is located on the side of the clamping member 30 away from the housing 10. The dust removal chamber 40 is provided with a dust removal cavity 41 and an exhaust channel 42 connected to the dust removal cavity 41. The dust removal cavity 41 is connected to the exhaust channel 31.

[0119] In other words, the dust removal chamber 40 is located below the workpiece 300 to be welded. The air inlet of the dust removal chamber 40 is connected to the bottom or side of the laser beam channel 11. The bottom of the dust removal chamber 40 is provided with a discharge port for the settling and discharge of welding slag.

[0120] In this way, welding slag, fumes and other dust in the air passage 31 can be discharged into the dust removal chamber 41 under the action of gravity or airflow, and then discharged to the outside through the exhaust passage 42.

[0121] As an example, an exhaust pipe is provided in the dust collection chamber 40, and the interior of the exhaust pipe has an exhaust passage 42.

[0122] As an example, the exhaust channel 42 is located at the bottom of the dust removal chamber 41, which helps to improve the removal of welding slag, fumes and other contaminants.

[0123] As an example, the dust removal chamber 40, the air curtain generating device 20, and the housing 10 are arranged coaxially.

[0124] In some embodiments, please refer to Figure 1 The dust removal device 100 also includes an air extraction device. The air extraction device is connected to the exhaust channel 42 and is used to draw air from the dust removal chamber 41 under negative pressure. This provides negative pressure suction to the welding slag, fumes, etc. in the air passage 31, so that the welding slag, fumes, etc. can quickly enter the dust removal chamber 41. Furthermore, it can extract and discharge the welding slag, fumes, etc. splashed in the dust removal chamber 41.

[0125] As an example, the bottom of the dust collection chamber 40 is equipped with an ash discharge valve for periodically discharging the collected welding slag particles.

[0126] In some embodiments, the extraction device includes a vacuum generator (not shown in the figure), with one end of an exhaust pipe connected to the dust removal chamber 41 and the vacuum generator connected to the other end of the exhaust pipe to create a negative pressure within the exhaust pipe. By connecting the vacuum generator and the dust removal chamber 41 through the exhaust pipe, a negative pressure is created within the dust removal chamber 41. Welding slag, fumes, and other debris splashed within the dust removal chamber 41 will be drawn away into the exhaust pipe under the suction force of the negative pressure.

[0127] In some embodiments, please refer to Figure 1 In the direction of extension of the air passage 31 and away from the air passage 31, the cross section of the dust removal chamber 40 gradually narrows along the direction of extension of the air passage 31, that is, the cross section of the dust removal chamber 40 gradually decreases along the direction of extension of the air passage 31.

[0128] In some embodiments, the exhaust pipe is detachably connected to the dust collection chamber 40. When the exhaust pipe cannot be used normally due to the accumulation of welding slag or other reasons, the exhaust pipe can be disassembled for repair and maintenance.

[0129] In some embodiments, please refer to Figure 1 The dust removal device 100 also includes a negative pressure channel 13, which is connected to the laser beam channel 11.

[0130] In some embodiments, please refer to Figure 1 The dust removal device 100 also includes a negative pressure generating device, which is connected to the negative pressure channel 13 and is used to generate negative pressure in the laser beam channel 11 through the negative pressure channel 13.

[0131] By setting up the negative pressure channel 13, welding slag, dust, and other contaminants in the laser beam channel 11 can be drawn into the negative pressure channel 13 and then discharged or collected. This prevents adverse consequences such as the overflow of welding slag and dust generated during the welding process, thus having good practicality. At the same time, by forming both the laser beam channel 11 and the negative pressure channel 13 on the housing 10, there is no need to set up a separate negative pressure pipe, which helps to simplify the structure of the dust removal device 100 and improve assembly efficiency.

[0132] It should be noted that the negative pressure generating device in this embodiment is a negative pressure fan or other negative pressure exhaust device commonly used in the prior art.

[0133] In the description of this application, the references to terms such as "in one embodiment," "in some embodiments," "in other embodiments," "in yet another embodiment," or "exemplary," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine the different embodiments or examples described in this application, as well as the features of the different embodiments or examples.

[0134] The above description is merely a preferred embodiment of this application and is not intended to limit the application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application are included within the scope of protection of this application.

Claims

1. A dust removal device, applied to a laser welding device, characterized in that, The dust removal device includes: A housing, the housing including a laser beam channel with an opening for a laser beam output from a laser generator to pass through, the laser beam welding the workpiece through the opening; An air curtain generating device is disposed in the housing and configured to output airflow toward the opening. The airflow passes through the laser beam channel to form an air curtain, which is at least used to isolate the laser generating device from the welding slag generated during the welding process. The air curtain is an annular air curtain, which is arranged around the circumference of the laser beam and avoids the laser beam.

2. The dust removal device according to claim 1, characterized in that, The air curtain generating device includes an air source and a jetting structure connected to the air source. The jetting structure includes at least one nozzle facing the opening.

3. The dust removal device according to claim 2, characterized in that, The number of nozzles is multiple, and the multiple nozzles are arranged at circumferential intervals along the laser beam channel.

4. The dust removal device according to claim 2, characterized in that, The nozzle has a continuous annular slit structure.

5. The dust removal device according to claim 2, characterized in that, The centerline of the nozzle is inclined relative to the centerline of the laser beam channel.

6. The dust removal device according to claim 5, characterized in that, The centerline of the nozzle is tilted at an angle of 25°-45° relative to the centerline of the laser beam channel.

7. The dust removal device according to claim 5, characterized in that, The tilt angle of the centerline of the nozzle relative to the centerline of the laser beam channel is less than or equal to the maximum tilt angle of the laser beam relative to the centerline of the laser beam channel.

8. The dust removal device according to any one of claims 2 to 7, characterized in that, The gas source is configured to provide inert gas.

9. The dust removal device according to any one of claims 1 to 7, characterized in that, The air curtain generating device is located at the end of the housing away from the opening and is arranged around the outer periphery of the laser generating device.

10. The dust removal device according to any one of claims 1 to 7, characterized in that, The housing is provided with a mounting part at the end away from the opening, and the mounting part is used to assemble with the laser generating device.

11. The dust removal device according to any one of claims 1 to 7, characterized in that, The dust removal device also includes a clamping member with an air passage. The clamping member is located at one end of the housing near the opening. The clamping member is configured to clamp the workpiece to be welded, and the air passage exposes the area to be welded of the workpiece.

12. The dust removal device according to claim 11, characterized in that, An air inlet channel is provided through the side wall of the clamping member, and the air outlet of the air inlet channel is connected to the air passage. In a cross section perpendicular to the extending direction of the air passage, the orientation of the air outlet is inclined relative to the line connecting the center of the air outlet and the center of the air passage, so that the airflow flowing out of the air outlet flows along the inner wall of the air passage.

13. The dust removal device according to claim 11, characterized in that, The dust removal device further includes a dust removal chamber, which is located on the side of the clamping member away from the housing. The dust removal chamber is provided with a dust removal cavity and an exhaust channel communicating with the dust removal cavity. The dust removal cavity is connected to the exhaust channel.

14. The dust removal device according to any one of claims 1 to 7, characterized in that, The dust removal device also includes a negative pressure channel, which is connected to the laser beam channel.

15. A laser welding apparatus, characterized in that, The laser welding apparatus includes: The dust removal device according to any one of claims 1 to 14; A laser generating device configured to output a laser beam passing through a laser beam channel for welding the workpiece to be welded.

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