Laser processing device with splash blocking structure

Abstract

The utility model discloses a laser processing device with a splash blocking structure, which comprises a pipe body and a blocking structure connected with the inner wall of the pipe body, and a laser channel in the pipe body comprises a laser inlet and a laser outlet which are oppositely arranged; the blocking structure comprises a first blocking part and a second blocking part, the first blocking part obliquely extends from the inner wall of the tube body to the laser outlet, and the inner diameter of the first blocking part is gradually reduced in the direction from the laser inlet to the laser outlet; the second blocking part extends from one end of the first blocking part away from the inner wall of the tube body to the laser outlet along the optical axis direction of the laser beam; the blocking structure is provided with a through hole for a laser beam to pass through, and the through hole is completely matched with the contour of the laser beam. In the laser machining process, due to the fact that the first blocking part inclines downwards, waste residues accumulated on the surface of the side, away from the laser outlet, of the first blocking part can fall off the laser channel in time along the inclined surface, the residue returning effect of the blocking structure is improved, the waste residues penetrating into the laser channel are effectively reduced, and an optical lens set is prevented from being polluted.

Description

Technical Field

[0001] The utility model relates to the technical field of laser processing equipment, and more specifically, to a laser processing device with a splash blocking structure. Background Art

[0002] Laser cutting utilizes a high-power density laser beam to illuminate the material being cut. The energy of the laser beam rapidly melts, vaporizes, ablates, or even ignites the material, thereby separating the workpiece. Laser cutting utilizes a high-energy density laser beam as a heat source to melt and cut the workpiece. During laser cutting and other processes, waste residue is inevitably generated, which can easily enter the laser processing device through the laser exit channel.

[0003] Since the laser processing device includes valuable components such as the laser generator and the optical lens group, a protective mirror is usually provided in the prior art to protect the optical lens to prevent waste residue from invading the laser processing device and damaging the valuable components. However, although the protective mirror can prevent damage to the optical lens, it is more likely to be damaged under the long-term impact of waste residue, and the replacement cost is also high.

[0004] Therefore, there is an urgent need to provide a laser processing device with a splash blocking structure that can prevent waste residue from damaging optical lenses or protective lenses in the laser processing device. Utility Model Content

[0005] The purpose of the present invention is to overcome the above-mentioned defects in the prior art and to provide a laser processing device with a splash blocking structure.

[0006] To achieve the above purpose, the technical solution of the utility model is as follows:

[0007] A laser processing device with a spatter blocking structure comprises: a tube body and a blocking structure connected to the inner wall of the tube body, wherein a through laser channel is provided in the tube body, and the laser channel comprises a laser inlet and a laser outlet arranged opposite to each other along the optical axis of the laser beam; the blocking structure comprises a first blocking portion and a second blocking portion connected in sequence, the first blocking portion extending obliquely from the inner wall of the tube body toward the laser outlet, and the inner diameter of the first blocking portion gradually decreases in the direction from the laser inlet to the laser outlet; the second blocking portion extends from an end of the first blocking portion away from the inner wall of the tube body toward the laser outlet along the optical axis of the laser beam; the blocking structure is provided with a through hole for the laser beam to pass through, and the through hole is fully adapted to the profile of the laser beam.

[0008] Optionally, the tube body is provided with two or more blocking structures sequentially arranged along the optical axis direction of the laser beam.

[0009] Optionally, along a direction from the laser inlet to the laser outlet, the aperture of the through hole of each blocking structure gradually decreases.

[0010] Optionally, the tube body is further provided with a blocking support member detachably connected to the inner wall of the tube body, and the blocking structure is arranged on the blocking support member.

[0011] Optionally, the blocking support member is a tubular structure with a continuous surface, or a tubular structure with a discontinuous surface.

[0012] Optionally, a waste residue collecting member is provided between two adjacent blocking structures, and the waste residue collecting member is detachably connected to the inner wall of the blocking support member.

[0013] Optionally, a surface of the first blocking portion close to the laser outlet is a rough surface, and a surface of the first blocking portion close to the laser entrance is a smooth surface.

[0014] Optionally, an adhesive layer is provided on a surface of the first blocking portion close to the laser outlet and on an outer surface of the second blocking portion.

[0015] Optionally, the blocking structure is a magnetic member.

[0016] Optionally, the through hole is formed by laser ablation.

[0017] The implementation of the present invention will have the following beneficial effects:

[0018] The present invention provides a laser processing device with a spatter blocking structure, comprising: a tube body and a blocking structure connected to the inner wall of the tube body, wherein a through laser channel is provided in the tube body, the laser channel including a laser inlet and a laser outlet arranged opposite each other along the optical axis of the laser beam; the blocking structure includes a first blocking portion and a second blocking portion connected in sequence, the first blocking portion extending obliquely from the inner wall of the tube body toward the laser outlet, the inner diameter of the first blocking portion gradually decreasing along the direction from the laser inlet to the laser outlet; the second blocking portion extending from an end of the first blocking portion away from the inner wall of the tube body toward the laser outlet along the optical axis of the laser beam; and the blocking structure having a through hole for the passage of the laser beam, the through hole being fully adapted to the profile of the laser beam. During laser processing, due to the downward inclination of the first blocking portion, slag that falls or accumulates on the surface of the first blocking portion facing away from the laser outlet will promptly fall down the inclined surface and escape from the laser channel, thereby improving the blocking structure's anti-slag effect, thereby effectively reducing slag that penetrates deep into the laser channel and preventing contamination of the optical lens assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Wherein:

[0021] Figure 1 is a schematic diagram of a laser processing device with a splash-blocking structure provided by the present invention.

[0022] Figure 2 is another schematic diagram of a laser processing device with a splash-blocking structure provided by the present invention.

[0023] Figure 3 is another schematic diagram of a laser processing device with a splash-blocking structure provided by the present invention.

[0024] Figure 4 is another schematic diagram of a laser processing device with a splash-blocking structure provided by the present invention. Detailed implementation manners

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0026] Referring to Figure 1 , a laser processing device with a splash-blocking structure includes: a tube body 100 and a blocking structure 1 connected to the inner wall of the tube body 100. A through laser channel 101 is provided in the tube body 100. The laser channel 101 includes a laser inlet 1011 and a laser outlet 1012 that are oppositely arranged along the optical axis direction of the laser beam. The blocking structure 1 includes a first blocking portion 11 and a second blocking portion 12 that are sequentially connected. The first blocking portion 11 extends obliquely from the inner wall of the tube body 100 towards the laser outlet 1012. Along the direction from the laser inlet 1011 to the laser outlet 1012, the inner diameter of the first blocking portion 11 gradually decreases. The second blocking portion 12 extends from the end of the first blocking portion 11 away from the inner wall of the tube body 100 along the optical axis direction of the laser beam towards the laser outlet 1012. The blocking structure 1 is provided with a through hole 10 for the laser beam to pass through, and the through hole 10 is completely adapted to the laser beam profile.

[0027] It should be noted that the laser processing device in this embodiment includes an optical lens assembly 200, a tube body 100 and a nozzle 300 arranged in sequence. Figure 1 To clearly illustrate the internal structure of the tube body 100, the dimensions of the optical lens assembly 200, tube body 100, and nozzle 300 shown in the figure are for illustrative purposes only and are not intended to be limiting. By disposing the blocking structure 1 between the nozzle 300 and the optical lens assembly 200 of the laser processing device, the blocking structure 1 blocks waste residue from entering the laser channel 101 during laser cutting, thereby preventing contamination of the optical lens assembly 200. Specifically, in this embodiment, the first blocking portion 11 is a conical barrel structure, and the second blocking portion 12 is a circular column structure. During the laser processing process, since the first blocking portion 11 has a downwardly inclined surface, waste residue that falls or accumulates on the surface of the first blocking portion 11 facing away from the laser outlet 1012 will promptly fall along the inclined surface and escape from the laser channel 101, further enhancing the anti-slag effect of the blocking structure 1.

[0028] Specifically, the through hole 10 can be a pre-processed through hole, and the spot diameter at the position corresponding to the through hole on the laser beam is adapted to the diameter of the through hole; illustratively, the through hole 10 can be ablated by the laser beam at the beginning of laser processing, further increasing the matching degree between the through hole 10 and the laser beam, and further improving the slag blocking effect of the blocking structure 1.

[0029] It will be appreciated that the blocking structure 1 provided in this embodiment is applicable to various types of laser processing devices. For example, the laser processing device may be a laser processing head. Typically, a laser processing head comprises a housing containing at least one optical system for guiding and / or shaping the laser beam. Specifically, the collimating optical system is used to collimate the laser beam introduced into the laser processing head from a diverging laser beam source, while the focusing optical system helps focus the laser beam on the workpiece surface. The collimating optical system and the focusing optical system define the laser beam's path within the laser processing head housing. A nozzle is positioned at one end of the housing near the workpiece to be processed. The blocking structure 1 in this embodiment can be installed between the optical system and the nozzle in the laser processing head housing to prevent waste residue entering from the nozzle from contaminating the optical system. For example, the laser processing device may be a handheld cutting gun. Typically, a handheld cutting gun comprises a handheld gun body, a laser output barrel, and a laser nozzle. The handheld gun body is provided with an optical lens. In this embodiment, the blocking structure 1 can be installed within the laser output barrel of the handheld cutting gun to prevent waste residue entering from the laser nozzle from contaminating the optical lens. The laser processing head and the handheld cutting gun can be commonly used laser processing heads and handheld cutting guns in the prior art, and are not specifically limited here. The blocking structure 1 in this embodiment can also be used in laser processing devices such as laser welding and laser marking to play a slag removal role.

[0030] In some alternative embodiments, there are provided two or more blocking structures 1 arranged in sequence along the optical axis direction of the laser beam inside the tube body 100.

[0031] Specifically, referring to Figure 2 , Figure 2 as an example, there are two blocking structures 1 arranged in sequence along the optical axis direction of the laser beam inside the tube body 100. The first blocking structure 13 is arranged close to the laser exit 1012, and the second blocking structure 14 is arranged close to the laser entrance 1011.

[0032] It can be understood that by setting the first blocking structure 13 and the multi-stage structure of the first blocking structure 13, the waste residue is blocked step by step by the first blocking structure 13 and the second blocking structure 14, effectively reducing the waste residue penetrating into the inside of the laser channel 101. Further, when there are two or more blocking structures 1 inside the tube body 100, the blocking structures 1 block the waste residue step by step in multiple stages, further improving the anti-waste residue effect of the blocking structure 1.

[0033] In some alternative embodiments, along the direction from the laser entrance 1011 to the laser exit 1012, the aperture diameters of the through holes 10 of each blocking structure 1 gradually decrease.

[0034] Specifically, continuing to refer to Figure 2 , the through hole 10 on the first blocking structure 13 is the first through hole 131, the through hole 10 on the second blocking structure 14 is the second through hole 121, and the aperture diameter D1 of the first through hole 131 is smaller than the aperture diameter D2 of the second through hole 121.

[0035] It can be understood that the first blocking structure 13 is arranged close to the laser exit 1012, then the second blocking structure 14 is arranged close to the laser entrance 1011. The laser exit 1012 is the end of the laser device close to the workpiece to be processed, and the laser entrance 1011 is the end of the laser device close to the optical lens group 200. Since the diameter of the laser beam gradually decreases from the laser entrance 1011 to the laser exit 1012, the aperture diameter D1 of the first through hole 131 is made smaller than the aperture diameter D2 of the second through hole 121. The first through hole 131 and the second through hole 121 form a laser channel 101 with a gradually changing diameter. When the aperture diameter of the first through hole 131 decreases, the effective blocking area of the first blocking structure 13 is further increased, reducing the waste residue penetrating into the inside of the laser channel 101. Then when there are two or more blocking structures 1 inside the tube body 100, along the direction from the laser entrance 1011 to the laser exit 1012, the aperture diameters of the through holes 10 of each blocking structure 1 gradually decrease.

[0036] In some alternative embodiments, referring to Figure 3 , a blocking support member 2 detachably connected to the inner wall of the tube body 100 is further provided inside the tube body 100, and the blocking structure 1 is arranged on the blocking support member 2.

[0037] It should be noted that the blocking and supporting member 2 is detachably connected to the inner wall of the tube body 100. For example, the tube body 100 is directly sleeved outside the blocking and supporting member 2, and the blocking and supporting member 2 abuts against the inner wall of the tube body 100, which is convenient for the installation or disassembly of the blocking structure 1. Figure 3 In this example, two blocking structures 1 are provided. The blocking structure 1 is installed on the blocking and supporting member 2, which is convenient for the disassembly and assembly of the blocking structure 1. In this embodiment, the blocking and supporting member 2 is a cylindrical structure, and the blocking and supporting member 2 can be a cylindrical structure with a continuous surface or a cylindrical structure with a discontinuous surface. When the blocking and supporting member 2 is a cylindrical structure with a discontinuous surface, that is, the blocking and supporting member 2 includes a first sub-supporting member and a second sub-supporting member (not shown in the figure) arranged in sequence along the optical axis direction of the laser beam, the first blocking structure 11 is installed on the first sub-supporting member, and the second blocking structure 12 is installed on the second sub-supporting member. When the blocking and supporting member 2 is a cylindrical structure with a continuous surface, the overall blocking structure 1 can be installed or disassembled at one time, improving the disassembly and assembly efficiency. Further, the first blocking structure 13 and the second blocking structure 14 are respectively detachably connected to the blocking and supporting member 2, such as a commonly used snap connection. When the blocking structure 1 is dirty, only the blocking structure 1 needs to be replaced, without replacing the blocking and supporting member 2, reducing consumables and saving costs.

[0038] In some alternative embodiments, a waste residue collecting member 3 is further provided between two adjacent blocking structures 1, and the waste residue collecting member 3 is detachably connected to the inner wall of the blocking and supporting member 2.

[0039] Specifically, referring to Figure 4 , Figure 4 In this example, two blocking structures 1 are provided. A waste residue collecting member 3 is provided between the first blocking structure 13 and the second blocking structure 14, and the waste residue collecting member 3 is detachably connected to the inner wall of the blocking and supporting member 2.

[0040] It can be understood that the waste residue collecting member 3 is also a barrel-shaped structure. The waste residue collecting member 3 can be a waste residue collecting bag sleeved inside the blocking and supporting member 2, or a tearable waste residue adsorption film. The waste residue collecting member 3 is detachably connected to the blocking and supporting member 2, and the waste residue is adsorbed on the inner side surface of the waste residue collecting member 3. The inner side surface of the waste residue collecting member 3 is the side surface of the waste residue collecting member 3 away from the inner wall of the tube body 100. The setting of the waste residue collecting member 3 is convenient for collecting and cleaning the waste residue.

[0041] In some alternative embodiments, the surface of the first blocking portion 11 close to the laser exit 1012 is a rough surface, and the surface of the first blocking portion 11 close to the laser entrance 1011 is a smooth surface.

[0042] It should be noted that the rough surface of the first blocking portion 11 can be a pyramidal structure surface, a honeycomb surface, or the like. By providing a rough surface, when waste slag passes through the blocking structure 1, the waste slag is more likely to adhere to the rough surface of the first blocking portion 11, thereby achieving a better blocking effect. The first blocking portion 11 not only blocks the waste slag but also further absorbs the waste slag, preventing the waste slag from damaging or contaminating the optical mirror surface during the movement of the cutting device. Because the first blocking portion 11 is tilted downward, the side of the first blocking portion 11 near the laser inlet 1011 is a smooth surface. This facilitates the waste slag that falls or accumulates on the side of the first blocking portion 11 facing away from the laser outlet to fall along the inclined surface in a timely manner and escape from the laser channel 101, further enhancing the anti-slag effect of the blocking structure 1.

[0043] In some optional embodiments, an adhesive layer is provided on a surface of the first blocking portion 11 close to the laser outlet 1012 and an outer surface of the second blocking portion 12 .

[0044] It should be noted that the adhesive layer is preferably configured as an adhesive layer with high adhesion, so that it can bind waste particles and / or waste suspended particles for a long time. The adhesive layer can be a film, grease, etc.; further, the adhesive layer is a tearable isolation film, which is formed by spraying a detachable isolation film, such as a splash-proof agent or the like, and then solidifying to form a film. The splashes can be shaken off by vibration or the like, or the isolation film can be torn off together with the splashes to clean them. When waste particles enter the tube body 100 of the laser processing device and change their position due to the movement of the laser processing device or due to other external influences, the adhesive layer can bind the particles in the waste by adhesion or fix them. By providing an adhesive layer on the side of the first blocking part 11 close to the laser outlet 1012 and the outer surface of the second blocking part 12, the adhesive layer fixes the waste by adsorption, thereby preventing the waste from moving arbitrarily during the process of moving the cutting device and damaging or staining the optical mirror. The outer surface of the second blocking part 12 is the side close to the inner wall of the pipe 100. Furthermore, the adhesive layer is detachably connected to the base. Therefore, when the adhesive layer is dirty, only the adhesive layer needs to be replaced without replacing the entire blocking structure 1, thereby reducing consumables and saving costs.

[0045] In some optional embodiments, the blocking structure 1 is a magnetic member.

[0046] Furthermore, an adhesive layer is provided on both the surface of the first blocking portion 11 close to the laser outlet 1012 and the outer surface of the second blocking portion 12. The magnetic member and the adhesive layer work together to absorb the residue, thereby enhancing the adsorption effect.

[0047] It can be understood that during the specific cutting process, after the waste residue invades the laser channel 101, it will be blocked by the blocking structure 1. However, some waste residue may continue to invade deeper into the laser projection channel through the through hole 10, and the magnetic part can magnetically adsorb the waste residue, thereby alleviating the invasion of the waste residue passing through the through hole 10 to a deeper position.

[0048] The above-described embodiments only represent several implementation manners of the present utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the patent of the present utility model shall be subject to the appended claims.

Claims

1. A laser processing device with a splash blocking structure, characterized in that, Comprising: a tube body and a blocking structure connected to the inner wall of the tube body. A through laser channel is provided in the tube body, and the laser channel includes a laser inlet and a laser outlet oppositely arranged along the optical axis direction of the laser beam; the blocking structure includes a first blocking portion and a second blocking portion connected in sequence. The first blocking portion extends obliquely from the inner wall of the tube body towards the laser outlet, and along the direction from the laser inlet to the laser outlet, the inner diameter of the first blocking portion gradually decreases; the second blocking portion extends from the end of the first blocking portion away from the inner wall of the tube body towards the laser outlet along the optical axis direction of the laser beam; the blocking structure is provided with a through hole for the laser beam to pass through, and the through hole is completely adapted to the laser beam profile.

2. The laser processing device with a splash blocking structure according to claim 1, wherein Two or more blocking structures are provided in the tube body in sequence along the optical axis direction of the laser beam.

3. The laser processing device with a splash blocking structure according to claim 2, wherein, Along the direction from the laser inlet to the laser outlet, the aperture of the through hole of each of the blocking structures gradually decreases.

4. The laser processing apparatus with a splash blocking structure according to claim 1, characterized in that, A blocking support member detachably connected to the inner wall of the tube body is further provided in the tube body, and the blocking structure is arranged on the blocking support member.

5. The laser processing device with a splash-blocking structure according to claim 4, wherein, The blocking support member is a cylindrical structure with a continuous surface or a cylindrical structure with a discontinuous surface.

6. The laser processing device with a splash blocking structure according to claim 4, wherein, A waste residue collection member is further provided between two adjacent blocking structures, and the waste residue collection member is detachably connected to the inner wall of the blocking support member.

7. The laser processing apparatus with a splash blocking structure according to claim 1, wherein, The surface of the first blocking portion close to the laser outlet is a rough surface, and the surface of the first blocking portion close to the laser inlet is a smooth surface.

8. The laser processing device with a splash blocking structure according to claim 1, characterized in that, An adhesive layer is provided on the surface of the first blocking portion close to the laser outlet and on the outer surface of the second blocking portion.

9. The laser processing apparatus with a splash blocking structure according to claim 1, wherein The blocking structure is a magnetic member.

10. The laser processing device with a splash blocking structure according to claim 1, characterized in that, The through hole is formed by laser ablation.

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