Protective assembly for laser processing head and laser processing head

Abstract

The utility model belongs to the technical field of laser processing, and particularly relates to a protection assembly for a laser processing head, and the protection assembly comprises at least one magnetic attraction part which is arranged outside or inside a light outlet channel of the processing head. The protection assembly can be arranged between the protection glass and the nozzle, can also be arranged on the protection glass or the nozzle and is used for adsorbing and / or blocking substances such as splashes and chippings generated during machining. According to the technical scheme, the anti-splashing effect can be greatly improved, the protective glass is prevented from being damaged, and the service life of the protective glass is prolonged.

Description

Technical Field

[0001] The present application belongs to the field of laser processing technology, and in particular relates to a protective component for a laser processing head and a laser processing head. Background Art

[0002] Laser processing uses a high-energy-density laser beam as a heat source to heat the workpiece. The energy of the laser radiation diffuses into the interior of the material through heat conduction, melting the material to form a specific molten pool to achieve the purpose of welding or cutting. When welding or cutting galvanized sheet, carbon steel, iron and other materials with large spatter, the dust-proof structure of the laser processing head directly hits the protective mirror, causing damage to the protective mirror and resulting in high maintenance costs for users.

[0003] At present, in order to solve the above problem, a separate protective cover is generally set outside the laser processing head. However, this method can only collect and block part of the welding slag, and cannot completely prevent the welding slag from entering the barrel. Therefore, the dust-proof structure of the laser processing head in the prior art still has the problem of welding slag blocking the gun barrel and damaging the protective lens. Utility Model Content

[0004] The utility model aims to provide a protective component for a laser processing head and a laser processing head, aiming to solve the problem that the protective mirror is easily damaged in the prior art.

[0005] To achieve the above object, the utility model provides a protective assembly for a laser processing head, comprising:

[0006] At least one magnetic attraction component is arranged outside or inside the light outlet channel of the processing head, and the protection component is located between or above the protection mirror and the nozzle of the processing head.

[0007] Optionally, the magnetic attraction member is a permanent magnet and / or an electromagnet.

[0008] Optionally, the magnetic attraction component includes at least one permanent magnet magnetic attraction component and at least one electromagnet magnetic attraction component, the permanent magnet magnetic attraction component is arranged close to the nozzle, and the electromagnet magnetic attraction component is arranged close to the protective mirror.

[0009] Optionally, the protective component is disposed inside or outside the light exit channel; or the protective component is disposed on at least one side of the light exit channel.

[0010] Optionally, when the magnetic attraction component is located in the light exit channel, it has a first through hole coaxial with the light exit channel.

[0011] Optionally, the protection component further includes a stopper structure, the stopper structure is located in the light exit channel, the stopper structure and the magnetic attraction member are coaxially sleeved or spaced from each other, and a second through hole coaxial with the light exit channel is provided;

[0012] The axial cross section of the second through hole is rectangular, conical or inverted conical.

[0013] Optionally, the stop structure and the central axis of the light outlet channel form an annular groove with a preset angle; or, the stop structure is provided with an annular groove on one side facing the nozzle.

[0014] Optionally, the protective component is fixed to the inside or outside of the light output channel by at least one of a connector, a thread, a connecting hole, a riveting, a fastener, a sleeve or a snap-fit ​​structure.

[0015] Optionally, at least a portion of the outer surface of the protective component is coated with grease.

[0016] The utility model also provides a laser processing head, and the laser processing head comprises the protection component as described in any one of the above.

[0017] The utility model has at least the following beneficial effects: the protective component is disposed between the protective mirror and the nozzle, but is not limited thereto, and can also be disposed on the nozzle. The protective component includes at least one magnetic component. In one case, the magnetic component is disposed outside the light outlet channel. In another case, the magnetic component is disposed inside the light outlet channel to absorb and / or block splashes, debris and other substances generated during processing. The technical solution of the present application improves the anti-splash effect, avoids damage to the protective mirror, and increases the service life of the protective mirror; at the same time, it also avoids the problem of an external protective cover affecting the user's operating field of view. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 is a cross-sectional schematic diagram of a laser processing head protection assembly in the first case;

[0020] Figure 2 is a cross-sectional schematic diagram of a laser processing head protection assembly in the second case;

[0021] Figure 3 is a schematic cross-sectional view of a laser processing head protection assembly in the third case;

[0022] Figure 4 is a schematic cross-sectional view of a laser processing head protection assembly in a fourth case;

[0023] Figure 5 is a cross-sectional schematic diagram of a laser processing head protection assembly in a fifth case;

[0024] Figure 6 is a cross-sectional schematic diagram of a laser processing head protection assembly in a sixth case;

[0025] Figure 7 for Figure 2 One of the schematic diagrams of the magnetic attraction component and the light outlet channel;

[0026] Figure 8 for Figure 2 Another schematic diagram of the central magnetic element and the light outlet channel;

[0027] Fig. 9 for Figure 1 One of the schematic diagrams of the magnetic attraction component and the light outlet channel;

[0028] Fig.10 for Figure 1 Another schematic diagram of the central magnetic element and the light outlet channel;

[0029] Fig.11 It is a cross-sectional schematic diagram of a laser processing head protection assembly provided with a blowing piece;

[0030] Fig.12 A schematic cross-sectional view of a laser processing head protection assembly provided with an air suction member;

[0031] Fig.13 is a three-dimensional schematic diagram of a third stop structure;

[0032] Fig.14 It is a schematic diagram of the cross-section details at the protective mirror;

[0033] Fig.15 is a cross-sectional schematic diagram of a first situation of the second stop structure;

[0034] Fig.16 is a cross-sectional schematic diagram of a second situation of the second stop structure;

[0035] Fig.17 is a cross-sectional schematic diagram of a third situation of the second stop structure;

[0036] Fig.18 It is a cross-sectional schematic diagram of the fourth case of the second gear structure.

[0037] Among them, the reference numerals in the figure are:

[0038] 1. Protective mirror; 10. Protective mirror base; 21a / 21b, magnetic part; 210, first through hole; 22, second stop structure; 220, second through hole; 222, annular groove; 221, annular inclined portion; 23, third stop structure; 230, third through hole; 3. Nozzle; 40, light outlet channel; 401, magnetic part; 50, air delivery part; 60, air suction part; 70, air pressure balance part. Implementation

[0039] The embodiments of the present invention are described in detail below, and examples of the embodiments 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 invention, and should not be construed as limiting the present invention.

[0040] In the description of the present invention, 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 the present invention 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 the present invention.

[0041] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0042] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] like Figures 1 to 18As shown, a laser processing head protection component involved in the present application includes a protection mirror 1, a nozzle 3 and a protection component 2. The protection component 2 is arranged between the protection mirror 1 and the nozzle 3, but is not limited to this, and can also be arranged on the nozzle 3. Specifically, a light output channel 40 for transmitting laser is arranged between the protection mirror 1 and the nozzle 3, and the protection component 2 includes at least one magnetic component 21. In one case, the magnetic component 21 is arranged outside the light output channel 40. In other words, at least one tubular structure with one purpose or number is provided between the protective mirror 1 and the nozzle 3, and a tubular structure is provided with a light output channel 40 or the channels on each tubular structure are connected to form a light output channel 40. The magnetic component 21 is arranged on the periphery of the above-mentioned tubular structure. In another case, the magnetic component 21 is arranged in the light output channel 40 to absorb and / or block splashes, debris and other substances generated during processing.

[0044] In one embodiment, the magnetic attraction member 21 is a permanent magnet or an electromagnet.

[0045] In one embodiment, at least one magnetic attraction member 21 is a permanent magnet. At least one magnetic attraction member 21 is an electromagnet. Specifically, the magnetic attraction member 21b which is a permanent magnet and the magnetic attraction member 21a which is an electromagnet are sequentially arranged between the nozzle 3 and the protective mirror 1. Further, the magnetic attraction member 21b which is a permanent magnet arranged close to the nozzle 3 is used for primary blocking of splashing materials, and some splashing materials which are not blocked are blocked by the electromagnet type magnetic attraction member 21a arranged thereafter.

[0046] Specifically, the electromagnetic magnetic attraction component 21a can automatically adjust the direction and strength of the magnetic attraction force of the magnetic attraction component 21a through the current to prevent the new protective lens 1 and the cavity of the protective lens 1 from being contaminated with dust, splashes, etc. during the replacement of the protective lens 1. During the replacement of the protective lens 1, the permanent magnet magnetic attraction component 21b continues to maintain the magnetic force, and the electromagnetic magnetic attraction component 21a is powered off or the current is adjusted, so that the dust or splashes near it flow back to the vicinity of the permanent magnet magnetic attraction component 21 until they are adsorbed and fixed.

[0047] In one embodiment, the magnetic member 21 is an annular structure, which is disposed inside or outside the light outlet channel 40. Figure 1 , Figure 2 , Figure 7 , Figure 8 , Fig. 9 ,and Fig.10 As shown, the magnetic member 21 is arranged outside the light exit channel 40. The magnetic member 21 may be a block structure, and is only arranged on one side of the light exit channel 40, and may be one side inside the light exit channel 40, or one side of the outer wall of the light exit channel 40. Optionally, the number of magnetic members 21 is not limited to one, and multiple magnetic members 21 may be evenly arranged.

[0048] In one embodiment, when the magnetic member 21 is at least partially located in the light exit channel 40, the magnetic member 21 has a first through hole 210 coaxially arranged with the light exit channel 40 for allowing the laser beam to pass through.

[0049] In one embodiment, the protection assembly 2 includes a second stop structure 22, and the second stop structure 22 is located in the light exit channel 40. When the magnetic member 21 is at least partially located in the light exit channel 40, in one case, the magnetic member 21 and the second stop structure 22 are coaxially sleeved with each other. Specifically, the splashing objects are blocked at the second stop structure 22 and then adsorbed and collected by the magnetic member 21.

[0050] In one embodiment, the magnetic attraction member 21 and the second stop structure 22 are spaced apart from each other.

[0051] In one embodiment, Figure 5 , Figure 6 , Fig.11 , Fig.12 , Fig.14 , Fig.15 , Fig.16 , Fig.17 and Fig.18 As shown, the second stop structure 22 forms an annular inclined surface 221 with a preset angle with the central axis of the light output channel 40. In other words, the second stop structure 22 is an inverted cone-shaped annular structure to form a collecting groove with the inner wall of the light output channel 40 or the inner wall of the magnetic suction component 21 to facilitate the collection of splashes.

[0052] In one embodiment, the second stop structure 22 is an annular groove 222 recessed toward one side of the nozzle 3 to collect splashes.

[0053] Optionally, when the second stop structure 22 is configured as a thin sheet structure, one of the situations is that: the sheet body is extended perpendicular to the central axis of the light outlet channel 40, and the sheet body and the inner wall of the light outlet channel 40 form a 90-degree groove structure, such as Fig.15 shown.

[0054] Optionally, when the second stop structure 22 is configured as a thin sheet structure, one of the situations is that the sheet body is arranged to extend in a direction intersecting the central axis of the light exit channel 40, and the sheet body and the inner wall of the light exit channel 40 form an acute-angled annular slope portion 221 structure. Fig.18 As shown, the annular slope portion 221 is opened toward the direction of the nozzle 3. In other words, the second stop structure 22 forms an annular slope portion structure in the shape of an inverted cone.

[0055] Optionally, when the second stop structure 22 is configured as a thin sheet structure, one of the situations is that the sheet body is arranged to extend in a direction intersecting the central axis of the light exit channel 40, and the sheet body and the inner wall of the light exit channel 40 form an obtuse annular inclined surface portion 221 structure. Fig.17 As shown, the annular slope portion 221 is opened toward the direction of the protective mirror 1. In other words, the second stop structure 22 forms a conical annular slope portion structure.

[0056] In one embodiment, please refer to Fig.14 The laser processing head also includes a protective mirror base 10, which is in the shape of a drawer or an annular sleeve. The protective mirror base 10 has magnetism, and a magnetic suction portion 401 that attracts the protective mirror base 10 is provided at a corresponding position on the inner wall of the light outlet channel 40. The two cooperate with each other to form an installation structure for the protective mirror 1, which can realize rapid installation and rapid disassembly of the protective mirror.

[0057] Optionally, the protective lens base 10 and the magnetic attraction portion 401 are both configured as electromagnets, and after the protective lens 1 is removed, the power can be automatically turned off, and the protective lens base 10 will not be affected by the external environment and contaminated with dust. In other words, the new protective lens base 10 does not generate magnetic attraction before installation, which means that the risk of contamination with dust is low.

[0058] Furthermore, the magnetic attraction between the protective mirror base 10 and the magnetic attraction portion 401 can also absorb dust and other splashing objects inside the light outlet channel 40 close to the protective mirror 1, thereby playing a certain dust-proof function.

[0059] In one embodiment, the second stop structure 22 has a second through hole 220 coaxially arranged with the light outlet channel 40, and the axial cross section of the second through hole 220 is rectangular or inverted conical, or rectangular and inverted conical in sequence; or inverted conical and rectangular in sequence.

[0060] In one embodiment, Figure 6 , Fig.11 , Fig.12 and Fig.13 As shown, the protection assembly 2 further includes a second stop structure 23 , which is disposed between the magnetic attraction member 21 and the nozzle 3 , and preferably, can be disposed at a position close to the nozzle 3 .

[0061] Optionally, the second stopper structure 23 has a third through hole 230 coaxially arranged with the light outlet channel 40, and the third through hole 230 is adapted to the scanning form of the laser. Optionally, the second stopper structure 23 forms the third through hole 230 under the burning of the laser, and before the laser is turned on, the second stopper structure 23 is a sealed film layer structure to ensure the dust-free sealing of the inner cavity of the light outlet channel 40.

[0062] In one embodiment, the magnetic attraction member 21, the second stop structure 22 and the third stop structure 23 are sequentially arranged along the laser emission direction, and the aperture of the light exit channel is also reduced sequentially. The aperture shape of the channel is adaptively set according to the laser scanning form; for example, it can be a geometric shape such as a circle, a direction, or an anisotropic shape.

[0063] In one embodiment, the second stop structure 23 is a thin plate or a thin film layer, such as copper, aluminum, stainless steel and other materials that do not deform after laser burning. Of course, it is not limited to copper, aluminum, stainless steel, and can also be other materials with similar properties to copper, aluminum, and stainless steel.

[0064] In one embodiment, Fig.11 As shown, the laser processing head protection assembly also includes a gas delivery member 50 for delivering gas, and the gas delivery member 50 is used to deliver gas in a direction with a preset angle to the axial direction of the protective mirror 1, so as to blow away the splashes near the nozzle 3 to a safe range. Optionally, at least one circle of gas outlet holes is provided on the gas delivery member 50, and the opening direction of the gas outlet holes is inclined.

[0065] In one embodiment, Fig.12 As shown, the laser processing head protection assembly also includes an air suction member 60, which is used to perform suction along a direction at a preset angle to the axial direction of the protective mirror 1, so as to generate negative pressure near the nozzle 3 and the workpiece, and collect large particles of welding slag, spatter, etc.

[0066] In one embodiment, the protective component 2 is fixed by at least one of a connector, a thread, a connection hole, a riveting, a fastener, a sleeve or a snap-fit ​​structure. Specifically, one or more of the magnetic member 21, the second stop structure 22 and the second stop structure 23 are fixed by at least one of a connector, a thread, a connection hole, a riveting, a fastener, a sleeve or a snap-fit ​​structure. The detachable design can facilitate the user to clean the splash accumulated in the assembly gap and the structural gap to achieve recycling.

[0067] In one embodiment, the laser processing head protection assembly includes an air pipe structure for conveying protective gas, and the protective gas structure and the light outlet channel 40 are coaxially connected to each other.

[0068] In one embodiment, the laser processing head protection assembly can also adopt an air pipe structure independently arranged from the light outlet channel 40 to deliver the protective gas from one side of the nozzle 3 toward the processing position. During the processing, the protective gas will flow back to the inside of the light outlet channel 40. Preferably, an air pressure balancing part 70 is provided between the protective mirror 1 and the nozzle 3 to balance the air pressure in the light outlet channel 40 to eliminate the influence on the blocking performance of the magnetic suction member 21 and the second stop structure 22.

[0069] In one embodiment, at least part of the outer surface of the protective component is coated with grease. Specifically, the outer surface of one or more of the magnetic member 21, the second stop structure 22 and the second stop structure 23 facing the nozzle 3 is coated with a coating or film such as grease to reduce the spattered welding slag from adhering to the surface.

[0070] Optionally, the above-mentioned grease substances can be oil-based substances such as silicone oil, anti-clogging solvents, water-based substances, and paint-based substances.

[0071] Optionally, a lubricating substance such as silicone oil is coated on the inner wall of the light exit channel 40 to facilitate users to quickly clean blocked welding slag and other splashes.

[0072] In one embodiment, the laser processing head protection component involved in the present application is a laser cutting or laser welding device. A lens barrel, a cooling element, a ceramic ring and other structures are selectively provided between the protective lens 1 and the nozzle 3. The lens barrel, the cooling element and the ceramic ring are assembled to form a light outlet channel 40 structure. The protection component 2 can be selectively provided on one or more of the lens barrel, the cooling element and the ceramic ring, which will not be described in detail here.

[0073] Furthermore, the air delivery component 50 and the air suction component 60 can be selectively arranged on one or more of the lens barrel, the cooling component, and the ceramic ring.

[0074] In one embodiment, the laser processing head protection assembly involved in the present application is a handheld or automatic laser welding, cleaning, cutting, etc. processing head. A gun rod structure with a certain length is arranged between the nozzle 3 and the protective mirror 1, and the light outlet channel 40 is arranged on the gun rod structure.

[0075] Furthermore, a protective film layer can be selectively plated on the protective mirror 1 to reserve a hollow corresponding to the laser scanning shape for normal processing. The protective film layer can prevent splashes from damaging the protective mirror lens body to a certain extent. Optionally, the surface of the protective film layer is coated with a lubricating substance such as silicone oil.

[0076] The splash-blocking structure of the present application can not only achieve the protective effect of the protective mirror 1 but also effectively reduce splashes, reduce the user's subsequent maintenance costs, and has better economic benefits.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A protective assembly for a laser processing head, characterized in that: include: At least one magnetic attraction component, the magnetic attraction component is arranged outside or inside the light outlet channel of the processing head, the magnetic attraction component includes at least one permanent magnet magnetic attraction component and at least one electromagnet magnetic attraction component, the permanent magnet magnetic attraction component is arranged close to the nozzle of the processing head, and the electromagnet magnetic attraction component is arranged close to the protective mirror of the processing head; Furthermore, the protection component is located between or above the protection mirror and the nozzle.

2. The protection assembly according to claim 1, characterized in that: The protection component is disposed inside or outside the light exit channel; or the protection component is disposed on at least one side of the light exit channel.

3. The protection assembly according to claim 1, characterized in that: When the magnetic attraction component is located in the light exit channel, it has a first through hole coaxial with the light exit channel.

4. The protection assembly according to claim 3, characterized in that: The protection component further includes a stopper structure, the stopper structure is located in the light exit channel, the stopper structure and the magnetic attraction member are coaxially sleeved or spaced from each other, and a second through hole coaxial with the light exit channel is provided; The axial cross section of the second through hole is rectangular, conical or inverted conical.

5. The protection assembly according to claim 4, characterized in that: The stop structure and the central axis of the light exit channel form an annular groove with a preset angle; or, An annular groove is concavely formed on one side of the stop structure facing the nozzle.

6. The protection assembly according to claim 1, characterized in that: The protection component is fixed to the inside or outside of the light output channel by at least one of a connector, a thread, a connecting hole, a riveting, a fastener, a sleeve or a snap-fit ​​structure.

7. The protection assembly according to claim 1, characterized in that: At least a portion of the outer surface of the protection component is coated with grease.

8. A laser processing head, characterized in that: The laser processing head comprises the protection component according to any one of claims 1-7.

Images