Laser processing head with dust filtering function

Abstract

The utility model belongs to the technical field of laser processing equipment, and particularly relates to a laser processing head with a dust filtering function, which comprises a hollow light passing channel for transmitting a laser beam, a protective glass and a nozzle, the protective glass and the nozzle are respectively arranged at two ends of the light passing channel, and at least one filtering piece is arranged between the protective glass and a light outlet of the nozzle. And the filtering piece is used for filtering splashing waste residues and processing dust invading the light passing channel. According to the laser machining head, the situation that waste residues are attached to the protective glass and damage the protective glass can be effectively avoided, the service life of the protective glass is prolonged advantageously, the maintenance cost of a user is reduced, and the use experience of the user is improved advantageously.

Description

Technical Field

[0001] The present application belongs to the technical field of laser processing equipment, and in particular relates to a laser processing head. Background Art

[0002] Laser processing utilizes a high-energy-density laser beam as a heat source to heat the workpiece. The energy from the laser radiation diffuses into the material through heat conduction, melting it to form a specific molten pool for welding or cutting. When welding or cutting materials that produce a lot of spatter, such as galvanized sheet, carbon steel, and iron, the laser processing head's spatter-proof structure can cause debris and spatter to directly strike the protective lens, damaging it and leading to higher maintenance costs.

[0003] Currently, the problem of debris and spatter generated during laser processing, which can clog the barrel and damage the protective lens, is typically addressed by installing a separate protective cover on the outside of the laser processing head. However, this approach can only collect and block some of the debris, but cannot completely prevent it from entering the interior of the laser processing head barrel. Therefore, the problem of debris generated during laser processing head operation damaging the protective lens still exists in the existing technology. Utility Model Content

[0004] The purpose of the present application is to provide a laser processing head, aiming to solve the problem in the prior art that the residues generated by the laser processing head during operation are likely to damage the protective lens.

[0005] To achieve the above-mentioned purpose, the technical solution adopted in this application is: a laser processing head with dust filtering function, comprising a hollow light channel for transmitting a laser beam and a protective mirror and a nozzle respectively arranged at both ends of the light channel, characterized in that at least one filter element is arranged between the protective mirror and the light outlet of the nozzle, and the filter element is used to filter splashing waste and processing dust invading the light channel.

[0006] In some embodiments, the filter element is provided with a structure to be penetrated for the laser beam to penetrate to form a laser avoidance hole; or, the filter element is provided with a hole to be expanded for the laser beam to expand the edge to form a laser avoidance hole.

[0007] In some embodiments, the filter element includes a filter core and / or a filter screen. The filter core is axially arranged in the light passage, and the filter screen is radially arranged at one or more positions in the light passage and between the nozzle light outlet.

[0008] In some embodiments, the light passage and the nozzle are detachably connected, a metal plane filter is provided at the connection between the light passage and the nozzle, and a laser avoidance hole is provided at a position where the metal plane filter coincides with the axis.

[0009] In some embodiments, the filter element or filter screen is provided with air-permeable mesh holes for the protective gas to pass through, and the diameter and unit density of the air-permeable mesh holes can ensure that the protective gas is blown out at a set flow rate.

[0010] In some embodiments, a fixing assembly is further included, and the filter element or filter screen is detachably mounted on the fixing assembly; a first connecting portion for detachably connecting to the fixing assembly is provided on the circumferential outer wall of the filter element, and a second connecting portion adapted to the first connecting portion is provided on the fixing assembly.

[0011] In some embodiments, the fixing component is threadedly fixed to the end face of the light passage or the end face of the nozzle; or the fixing component is elastically clamped to the inner wall of the light passage or the inner wall of the nozzle.

[0012] In some embodiments, when the fixing assembly is elastically fixed to the inner wall of the light passage, the fixing assembly also includes a first fixing frame for installing the filter element and a second fixing frame mounted on the light passage, the first fixing frame and the second fixing frame are detachably connected, and the second fixing frame is provided with at least one tightening member that abuts against the outer wall of the light passage, for limiting the displacement of the second fixing frame relative to the light passage.

[0013] In some embodiments, the filter element is further provided with one or more of an adhesive coating, a magnetic attraction layer, an electrostatic field plate, or an electromagnetic pulser.

[0014] In some embodiments, an ultrasonic vibration device is also attached to the filter element for shaking off the dust collected by the filter element through high-frequency vibration.

[0015] This application has at least the following beneficial effects:

[0016] The laser processing head of the present application includes a hollow light channel for transmitting a laser beam, a protective mirror and a nozzle and a filter respectively arranged at both ends of the light channel. The filter is used to filter out waste residue invading the light channel, which can effectively prevent the waste residue from adhering to the protective mirror and causing damage to the protective mirror, which is beneficial to extending the service life of the protective mirror, reducing the user's maintenance cost, and improving the user's experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1 A schematic diagram of the three-dimensional structure of the laser processing head provided in Example 1 of the present application;

[0019] Figure 2 A schematic cross-sectional view of the laser processing head provided in Example 1 of the present application;

[0020] Figure 3 A schematic cross-sectional view of the laser processing head provided in Example 2 of the present application;

[0021] Figure 4 This is a front view structural diagram of a first situation of the filtering mechanism of the laser processing head provided in the first embodiment of the present application;

[0022] Figure 5 This is a front view structural diagram of a second situation of the filtering mechanism of the laser processing head provided in Example 1 of the present application;

[0023] Figure 6 This is a front view structural diagram of the third situation of the filtering mechanism of the laser processing head provided in the first embodiment of the present application;

[0024] Figure 7 This is a front view structural diagram of a first situation of a fixing assembly of a laser processing head provided in the second embodiment of the present application;

[0025] Figure 8 This is a front view structural schematic diagram of the second situation of the fixing component of the laser processing head provided in Example 2 of the present application.

[0026] Among them, the reference numerals in the figures are:

[0027] 1. Laser processing head; 11. Light channel; 111. Mounting port; 112. Collecting tank; 113. Dumping port; 12. Protective mirror; 13. Nozzle; 14. Sealing cover; 2. Filter element; 23. Laser avoidance hole; 24. First connecting part; 3. Fixing assembly; 31. First fixing bracket; 32. Second fixing bracket; 321. Tightening member; 33. Second connecting part; 4. Air supply member; 5. Air suction member. DETAILED DESCRIPTION

[0028] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0029] In the description of this application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing 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 and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0030] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified with "first," "second," etc., may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0031] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0032] The inventive principle of the present application is to provide a laser processing head with a dust filtering function, comprising a hollow light passage for transmitting a laser beam and a protective mirror and a nozzle respectively arranged at both ends of the light passage, at least one filter element is arranged between the protective mirror and the light outlet of the nozzle, for filtering splashing waste residue and processing dust invading the light passage, a structure to be penetrated or a hole to be expanded is provided on the filter element for the laser beam to penetrate or expand, and a breathable mesh is also provided for the protective gas to penetrate, and the diameter and unit density of the breathable mesh can ensure that the protective gas is blown out at a set flow rate. Example

[0033] like Figures 1 to 2As shown, a laser processing head 1 according to the first embodiment of the present application includes a device body for generating a laser beam, a laser processing head 1 fixedly connected to the device body, and a filtering mechanism for filtering waste residue that invades the light passage 11 of the laser processing head 1. The light passage 11 of the laser processing head 1 transmits the laser beam generated by the device body. A protective mirror 12 and a nozzle 13 are respectively provided at both ends of the hollow light passage 11. The light passage 11 transmits the laser beam to the nozzle 13 and outputs it to the welding point, thereby providing the required welding temperature. A mounting port 111 is provided on the side wall of the light passage 11, which connects the inner cavity and the outside world and is used to install a filter mechanism. The filter mechanism includes a fixing component 3 detachably connected to the light passage 11 and a filter 2 installed on the fixing component 3. At least part of the fixing component 3 can be set in the light passage 11 from the mounting port 111. The filter 2 filters the waste residue invading the light passage 11, which can effectively prevent the waste residue from adhering to the protective mirror 12 and causing damage to the protective mirror 12, which is beneficial to extending the service life of the protective mirror 12. At the same time, since the fixing component 3 is detachably connected to the light passage 11, it is convenient for the user to replace the used filter mechanism in time, thereby ensuring the filtering performance of the filter mechanism, reducing the user's maintenance cost, and improving the user experience. The connection method of the fixing component 3 is not limited here. It can be threadedly fixed to the end face of the light passage or the end face of the nozzle; or elastically fixed to the inner wall of the light passage or the inner wall of the nozzle.

[0034] like Figure 1 、 Figure 2 、 Figure 4 and Figure 5 As shown, in the laser processing head 1 involved in Example 1 of the present application, the filter element 2 of the filtering mechanism is a filter element or filter screen that is detachably connected to the fixed component 3. By detachably connecting the filter element 2 to the fixed component 3, on the one hand, when the fixed component 3 is set in the light channel 11 from the installation port 111 on the light channel 11 to place the filter element 2 in the light channel 11, the filter element 2 is used to adhere to the waste residue invading the light channel 11, so as to prevent the waste residue from continuing to invade and adhere to the protective mirror 12 and causing damage to the protective mirror 12; on the other hand, by detachably connecting the filter element 2 to the fixed component 3, the user can promptly remove the used filter element 2 from the fixed component 3 and replace it, and the fixed component 3 can be reused, which effectively reduces the user's maintenance cost while ensuring the filtering performance of the filtering mechanism. Optionally, a first clearance hole for the laser beam to pass through is provided on the filter element 2. The laser beam penetrates the first clearance hole on the filter element 2 and is output to the welding or cutting point, providing the temperature required for welding or cutting, ensuring that the laser beam can be projected, and ensuring the reliability of the laser processing head 1.

[0035] The filter is a metal flat filter, such as a copper wire mesh with small meshes, which can prevent the passage of filter splashes and processing dust on the one hand, and allow the shielding gas to pass through without obstruction on the other hand.

[0036] Optionally, a first connection portion 24 for detachably connecting to the fixing assembly 3 is provided on the circumferential outer wall of the filter element 2, and a second connection portion 33 is provided on the fixing assembly 3 that is compatible with the first connection portion 24. By detachably connecting the first connection portion 24 on the filter element 2 and the second connection portion 33 on the fixing assembly 3, the filter element 2 is detachably connected to the fixing assembly 3, facilitating user replacement of the filter element 2 and enabling the fixing assembly 3 to be reused, thereby reducing user maintenance costs. The connection method between the first connection portion 24 of the filter element 2 and the second connection portion 33 of the fixing assembly 3 is not limited herein; detachable connection methods such as threaded connection, snap connection, or key connection may be used.

[0037] Optionally, there are multiple first connection parts 24 on the filter element 2, and the fixing component 3 is provided with multiple second connection parts 33 that are compatible with the multiple first connection parts 24. The multiple first connection parts 24 and the multiple second connection parts 33 are detachably connected to each other, so that the filter element 2 is firmly installed on the fixing component 3, effectively improving the stability of the connection between the filter element 2 and the fixing component 3, which is beneficial to ensuring the structural stability and reliability of the laser processing head 1.

[0038] like Figure 5 As shown, in the laser processing head 1 involved in Example 1 of the present application, the fixing assembly 3 of the filtering mechanism includes a first fixing frame 31 for installing the filter element 2 and a second fixing frame 32 mounted on the light passage 11, and the first fixing frame 31 and the second fixing frame 32 are detachably connected. The first fixing frame 31 with the filter element 2 is inserted into the light passage 11 from the mounting port 111 to place the filter element 2 in the light passage 11, and the filter element 2 is used to filter the waste residue invading the light passage 11. At the same time, the second fixing frame 32 is mounted on the light passage 11 and detachably connected to the first fixing frame 31, which can effectively limit the movement of the first fixing frame 31 relative to the light passage 11, thereby preventing the laser processing head 1 from vibrating during operation, causing the first fixing frame 31 to deviate relative to the light passage 11, and affecting the filtering effect of the filter element 2; at the same time, the first fixing frame 31 and the second fixing frame 32 are detachably connected, which is convenient for users to assemble and disassemble, and replace the filter element 2 in time, thereby ensuring the filtering performance of the filtering mechanism and reducing the maintenance cost of users.

[0039] Optionally, the second fixing frame 32 is provided with at least one pressing member 321 that abuts against the outer wall of the light passage 11, and is used to limit the displacement of the second fixing frame 32 relative to the light passage 11. By providing the pressing member 321 on the second fixing frame 32 that abuts against the outer wall of the light passage 11, the friction between the fixing assembly 3 and the light passage 11 is increased, thereby limiting the displacement of the second fixing frame 32 relative to the light passage 11, thereby limiting the movement of the first fixing frame 31 detachably connected to the second fixing frame 32 relative to the light passage 11, thereby preventing the laser processing head 1 from vibrating during operation, causing the first fixing frame 31 to deviate relative to the light passage 11 and affecting the filtering effect of the filter element 2. Optionally, there are multiple pressing members 321, and the multiple pressing members 321 are evenly distributed on the circumferential outer wall of the second fixing frame 32, effectively increasing the friction between the fixing assembly 3 and the light passage 11, while making the force applied to the second fixing frame 32 more uniform, which is beneficial to improving the structural stability of the laser processing head 1.

[0040] like Figures 2 to 3 As shown, the laser processing head 1 according to the first embodiment of the present application further includes at least one filter 2 disposed between the protective lens 12 and the nozzle 13. The filter 2 may be disposed in a position other than this and may also be disposed on the nozzle 13. The specific structure and number of the filter 2 are not limited herein; the filter 2 may be a blocking sheet, a blocking block, a blocking ring, or the like.

[0041] like Figure 8 As shown, in the laser processing head 1 according to the first embodiment of the present application, the filter 2 is provided with a structure to be penetrated; or, alternatively, a hole to be enlarged. The structure to be penetrated is used for the laser beam projected onto the light passage 11 to penetrate it, thereby forming a laser avoidance hole 23; the hole to be enlarged is used for the laser beam projected onto the light passage 11 to further penetrate the edge, thereby forming a laser avoidance hole 23 with a larger aperture. The filter 2 is used to minimize the aperture of the light passage 11 for transmitting the laser beam, thereby blocking spatter, debris, and other substances generated during processing.

[0042] Optionally, when a structure to be penetrated is provided on the filter element 2, the filter element 2 may be a structural component without a hole, capable of blocking the hollow light passage 11, so that the blocking effect can be exerted before the user uses it (for example, during the manufacturing, sales, storage before use, etc.), thereby effectively preventing foreign matter from entering the light passage 11 and causing damage to the interior of the laser processing head 1. When a hole to be expanded is provided on the filter element 2, the filter element 2 may be a structural component with a hole. In this case, the filter element 2 is provided in the hollow light passage 11, partially blocking the light passage 11. During the specific welding process, the laser beam is projected onto the filter element 2, and a portion of the laser beam directly passes through the hole to be expanded and continues to transmit, while another portion of the laser beam is projected onto the edge area of ​​the hole to be expanded on the filter element 2, thereby penetrating this area and expanding the edge of the hole to be expanded, ultimately expanding the aperture of the hole to be expanded to form a laser avoidance hole 23. Because the laser beam has a high degree of collimation, during the process of the laser beam penetrating the structure to be penetrated or the hole to be expanded, a laser avoidance hole 23 of exactly the same size as the laser beam can be formed in the structure to be penetrated or the hole to be expanded. The aperture of the laser avoidance hole 23 formed in the structure to be penetrated or the hole to be expanded is not much larger than the laser beam, thereby ensuring that the laser beam can be projected while avoiding the situation where the laser avoidance hole 23 is too large and the blocking performance is weakened, and can effectively block spatter, debris, and other substances generated during processing.

[0043] Optionally, part or all of the filter element 2 is a permanent magnet and / or an electromagnet, and the filter element 2 can be arranged near the nozzle 13 or the protective mirror 12, or directly on the nozzle 13 or the protective mirror 12; or, a magnetic adsorption layer is provided on the surface of the filter element 2 facing the nozzle 13.

[0044] Optionally, there are multiple filter elements 2, at least one of which is a permanent magnet and / or an electromagnet. At least one of the filter elements 2 has a magnetic adsorption layer on its surface facing the nozzle 13. Specifically, the filter element 2 with the magnetic adsorption layer and the filter element 2 with the permanent magnet and / or electromagnet are sequentially positioned between the nozzle 13 and the protective mirror 12. Furthermore, the filter element 2 with the magnetic adsorption layer positioned near the nozzle 13 is used to initially block splashing material, such that the filter element 2 not only blocks splashing material but also magnetically adsorbs it, thereby collecting the splashing material. Some unblocked splashing material is then blocked by the filter element 2 with the permanent magnet and / or electromagnet positioned therebehind. Furthermore, the filter element 2 with the electromagnet can control the direction and strength of the magnetic adsorption force of the filter element 2 by controlling the current in the electrostatic field plate or electromagnetic pulser, thereby preventing dust, splashing material, etc. from contaminating the new protective mirror 12 and its cavity during replacement.

[0045] Furthermore, an ultrasonic vibration device is attached to the filter element, which is used to shake off the dust collected by the filter element through high-frequency vibration.

[0046] like Figures 2 to 3 As shown, in the laser processing head 1 involved in the first embodiment of the present application, the inner wall of the light passage 11 of the laser processing head 1 is recessed inward to form a collecting groove 112 for collecting waste residue in the light passage 11, and a dumping port 113 connecting the collection groove 112 and the outside is provided on the side wall of the light passage 11 and at the bottom of the collecting groove 112, and the light passage 11 is covered with a sealing cover plate 14 at the dumping port 113; during operation, the waste residue invading the light passage 11 is blocked by the filter element 2 or the filtering mechanism and falls into the collecting groove 112 on the light passage 11, and the collection groove 112 provided on the light passage 11 can collect the fallen waste residue in time, thereby avoiding the accumulation of part of the waste residue in the light passage 11 and preventing the laser avoidance hole 23 from being blocked; when the operation is completed, the operator opens the sealing cover plate 14 and uses the dumping port 113 to dump the collected waste residue to clear the waste residue in the collection groove 112, which has a simple structure and convenient operation.

[0047] like Figure 2 As shown, the laser processing head 1 according to the first embodiment of the present application further includes a gas delivery member 4 disposed thereon. The gas delivery member 4 is configured to deliver gas in a direction forming a predetermined angle with respect to the axis of the protective mirror 12, thereby dispersing splashes near the nozzle 13 to a safe range. Optionally, the gas delivery member 4 is provided with at least one circle of gas outlet holes, the gas outlet holes being arranged at an angle.

[0048] like Figure 3 As shown, in another case of the laser processing head 1 involved in Example 1 of the present application, the laser processing head 1 also includes an air suction member 5 arranged on the laser processing head 1, and the air suction member 5 is used to suck gas along a direction at a preset angle to the axis of the protective mirror 12, so as to generate negative pressure near the nozzle 13 and the workpiece, and collect large particles of welding slag, spatter, etc. Example

[0049] like Figure 1 、 Figure 3 and Figure 6As shown, in the laser processing head 1 involved in Example 1 of the present application, the filter element 2 of the filtering mechanism is a non-smooth magnetic layer that is detachably connected to the fixed component 3 and has a Coanda effect; and / or, the filter element 2 is an anti-splash compound coating or a tearable film that is arranged on the fixed component 3 and has an adhesiveness; on the one hand, when the fixed component 3 is inserted into the light channel 11 from the mounting port 111 on the light channel 11 to set the filter element 2 in the light channel 11, the filter element 2 is used to adhere to the waste residue that invades the light channel 11, so as to prevent the waste residue from continuing to invade and adhere to the protective mirror 12 and causing damage to the protective mirror 12; on the other hand, by detachably connecting the filter element 2 to the fixed component 3; and / or, applying or tearing the filter element 2 on the fixed component 3, the user can promptly remove the used filter element 2 from the fixed component 3 and replace it, and the fixed component 3 can be reused, while ensuring the filtering performance of the filtering mechanism, effectively reducing the user's maintenance cost. Optionally, the filter element 2 is a viscous coating material, which may be an oil-based material such as silicone oil, an anti-clogging solvent, a water-based material, or a paint-based material.

[0050] Optionally, the fixing assembly 3 includes a fixing plate disposed in the light passage 11 for mounting the filter 2. The filter 2 is removable or applied to the fixing plate, so that when the fixing assembly 3 is inserted into the light passage 11 from the mounting opening 111 on the light passage 11, the fixing plate with the filter 2 is disposed in the light passage 11, and the filter 2 on the fixing plate is used to adhere to the waste residue invading the light passage 11, thereby preventing the waste residue from continuing to invade and adhere to the protective mirror 12 and causing damage to the protective mirror 12. Optionally, a second clearance hole for the laser beam to pass through is provided on the fixing plate. The laser beam penetrates the second clearance hole on the fixing plate and is output to the welding or cutting location, providing the temperature required for welding or cutting, ensuring that the laser beam can be projected, and guaranteeing the reliability of the laser processing head 1.

[0051] like Figure 7As shown, in the laser processing head 1 involved in Example 1 of the present application, the fixing assembly 3 of the filtering mechanism includes a first fixing frame 31 for installing the filter element 2 and a second fixing frame 32 mounted on the light passage 11, and the first fixing frame 31 and the second fixing frame 32 are detachably connected. The first fixing frame 31 with the filter element 2 installed is inserted into the light passage 11 from the mounting port 111 to set the filter element 2 in the light passage 11, and the filter element 2 set in the light passage 11 is used to filter the waste residue invading the light passage 11. At the same time, the second fixing frame 32 is mounted on the light passage 11 and detachably connected to the first fixing frame 31, which can effectively limit the movement of the first fixing frame 31 relative to the light passage 11, thereby preventing the laser processing head 1 from vibrating during operation, causing the first fixing frame 31 to deviate relative to the light passage 11, and affecting the filtering effect of the filter element 2; at the same time, the first fixing frame 31 and the second fixing frame 32 are detachably connected, which is convenient for users to assemble and disassemble, and replace the filter element 2 in time, thereby ensuring the filtering performance of the filtering mechanism and reducing the maintenance cost of users.

[0052] Optionally, the second fixing frame 32 is provided with at least one pressing member 321 that abuts against the outer wall of the light passage 11, and is used to limit the displacement of the second fixing frame 32 relative to the light passage 11. By providing the pressing member 321 on the second fixing frame 32 that abuts against the outer wall of the light passage 11, the friction between the fixing assembly 3 and the light passage 11 is increased, thereby limiting the displacement of the second fixing frame 32 relative to the light passage 11, thereby limiting the movement of the first fixing frame 31 detachably connected to the second fixing frame 32 relative to the light passage 11, thereby preventing the laser processing head 1 from vibrating during operation, causing the first fixing frame 31 to deviate relative to the light passage 11 and affecting the filtering effect of the filter element 2. Optionally, there are multiple pressing members 321, and the multiple pressing members 321 are evenly distributed on the circumferential outer wall of the second fixing frame 32, effectively increasing the friction between the fixing assembly 3 and the light passage 11, while making the force applied to the second fixing frame 32 more uniform, which is beneficial to improving the structural stability of the laser processing head 1. Example

[0053] According to the third embodiment provided in the present application, a laser processing head 1 may be one of a handheld laser welding head, an automatic laser welding device, and an automatic laser cutting device.

[0054] In the third embodiment, the laser processing head 1 involved in the present application is a laser cutting device or a laser welding device. The protective mirror 12 and the nozzle 13 are directly and selectively provided with a lens barrel, a cooling member, a ceramic ring and other structures. The lens barrel, the cooling member and the ceramic ring are assembled to form a light passage 11 for transmitting the laser beam. The mounting port 111 for installing the filter mechanism can be selectively set at any position on the light passage 11 of the laser processing head 1. It is only necessary to satisfy the requirement that the filter member 2 set in the light passage 11 can filter the waste residue invading the light passage 11 to prevent the waste residue from adhering to the protective mirror 12 and causing damage to the protective mirror 12. Detailed description is not given here.

[0055] Optionally, the air delivery component 4 or the air suction component 5 can be selectively arranged on one or more of the lens barrel, the cooling component, and the ceramic ring.

[0056] In Example 3, the laser processing head 1 involved in this application is a handheld or automatic laser welding, cleaning, cutting and other processing head; a gun rod structure with a certain length is arranged between the protective mirror 12 and the nozzle 13, and a light channel 11 for transmitting the laser beam is arranged on the gun rod structure.

[0057] Optionally, a protective film layer is provided on the protective mirror 12, with a hollow corresponding to the laser scanning shape reserved for normal processing. The protective film layer can prevent splashes from damaging the protective mirror 12 to a certain extent. Optionally, the protective film layer is a lubricating substance such as silicone oil coated on the surface of the protective mirror 12.

[0058] The laser processing head 1 provided with a filtering mechanism in the present application can use the filter element 2 in the light channel 11 to filter the waste residue invading the light channel 11, which can effectively prevent the waste residue from adhering to the protective mirror 12 and causing damage to the protective mirror 12, which is beneficial to extending the service life of the protective mirror 12. At the same time, since the fixing component 3 is detachably connected to the light channel 11, it is convenient for the user to replace the used filtering mechanism in time, thereby ensuring the filtering performance of the filtering mechanism, reducing the user's maintenance cost, and improving the user's experience.

[0059] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A laser processing head with a dust filtering function, comprising a hollow light channel for transmitting a laser beam and protective mirrors and a nozzle respectively arranged at both ends of the light channel, characterized in that: At least one filter is provided between the protective mirror and the light outlet of the nozzle, and the filter is used to filter splashing waste residue and processing dust that invade the light passage.

2. The laser processing head according to claim 1, characterized in that: The filter element is provided with a structure to be penetrated for the laser beam to penetrate to form a laser avoidance hole; or the filter element is provided with a hole to be expanded for the laser beam to expand the edge to form a laser avoidance hole.

3. The laser processing head according to claim 1, wherein: The filter element includes a filter core and / or a filter screen. The filter core is axially arranged in the light passage, and the filter screen is radially arranged at one or more positions in the light passage and between the nozzle light outlet.

4. The laser processing head according to claim 1, wherein: The light passage and the nozzle are detachably connected. A metal plane filter is provided at the connection between the light passage and the nozzle. A laser avoidance hole is provided at a position where the metal plane filter coincides with the axis.

5. The laser processing head according to claim 3, characterized in that: The filter element or filter screen is provided with air-permeable mesh holes for the protective gas to penetrate. The diameter and unit density of the air-permeable mesh holes can ensure that the protective gas is blown out at a set flow rate.

6. The laser processing head according to claim 3, characterized in that: It also includes a fixing component, and the filter element or filter screen is detachably mounted on the fixing component; a first connecting portion for detachably connecting to the fixing component is provided on the circumferential outer wall of the filter element, and a second connecting portion adapted to the first connecting portion is provided on the fixing component.

7. The laser processing head according to claim 6, characterized in that: The fixing component is threadedly fixed to the end face of the light passage or the end face of the nozzle; or the fixing component is elastically clamped to the inner wall of the light passage or the inner wall of the nozzle.

8. The laser processing head according to claim 7, characterized in that: When the fixing assembly is elastically clamped to the inner wall of the light passage, the fixing assembly also includes a first fixing frame for mounting the filter element and a second fixing frame sleeved on the light passage, the first fixing frame and the second fixing frame are detachably connected, and the second fixing frame is provided with at least one tightening member that abuts against the outer wall of the light passage, for limiting the displacement of the second fixing frame relative to the light passage.

9. The laser processing head according to claim 1, characterized in that: The filter element is further provided with one or more of an adhesive coating, a magnetic attraction layer, an electrostatic field plate or an electromagnetic pulser.

10. The laser processing head according to any one of claims 1 to 9, characterized in that: The filter element is also provided with an ultrasonic vibration device for shaking off the dust collected by the filter element through high-frequency vibration.

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