Lens protection device for laser processing

Abstract

The utility model relates to a lens protection device for laser processing, the lens protection device is installed on a shell of a protection lens, the shell is internally provided with a lens cavity for installing the protection lens, the shell is connected with a turnable buckle cover, and the buckle cover can shield or avoid a light through hole in the shell; a lens cavity is formed in the shell, a backflow ring is installed in the lens cavity, a purging ring cavity is formed between the backflow ring and the lens cavity, the shell is connected with an air inlet connector, the air inlet connector is communicated with the lens cavity, and the air inlet position corresponds to the position of the purging ring cavity. According to the lens protection device for laser processing, dust can be prevented from entering the lens cavity in the operation process and in the shutdown state of the laser processing device, so that the laser cutting lens is effectively protected.

Description

Technical Field

[0001] The present application relates to the field of lens protection technology, and in particular to a lens protection device for laser processing. Background Art

[0002] The principle of laser cutting and welding is to converge the divergent light beam generated by the laser emitter into a high-energy spot of hundreds of microns, and then interact with the material to achieve material removal, welding, cladding and other effects.

[0003] During the laser cutting and welding process, special care must be taken to protect the laser cutting lens. Furthermore, after the cutting and welding process is complete, the lens must be protected to prevent dust from entering. Any problems with the lens during laser cutting or welding can impact processing progress and even cause equipment downtime. Furthermore, lens protection is particularly important between the completion of a process and the start of the next one. Otherwise, the lens will become dirty as soon as the machine is turned on, impacting the customer experience.

[0004] Traditional lens protection devices, especially those used in welding processes, mostly do not have a flip-up protection function and the equipment is placed vertically. This is only suitable for use in windless or dusty environments. In harsh environments, the protective lens can easily be damaged. Utility Model Content

[0005] The purpose of this application is to provide a lens protection device for laser processing, which can prevent dust from entering the lens cavity during the operation and shutdown of the laser processing device, so as to effectively protect the laser cutting lens.

[0006] In order to achieve the above-mentioned object, the utility model provides a lens protection device for laser processing, which is installed on the housing of the protective lens. The housing is provided with a lens cavity for installing the protective lens. The housing is connected to a reversible buckle cover, which can cover or avoid the light hole on the housing.

[0007] A backflow ring is installed in the lens cavity, a purge ring cavity is set between the backflow ring and the lens cavity, the shell is connected to an air inlet connector, the air inlet connector is communicated with the lens cavity, and the air inlet position corresponds to the position of the purge ring cavity.

[0008] In an optional embodiment, the buckle cover includes a flip cover plate, which is connected to the shell through a torsion spring, the light hole is arranged on the side of the shell, and the buckle part of the flip cover plate is arranged relative to the position of the light hole.

[0009] In an optional embodiment, the torsion spring includes a left-handed torsion spring and a right-handed torsion spring arranged on both sides of the flip cover, and the left-handed torsion spring and the right-handed torsion spring are each provided with two torsion spring claws, one of which is inserted into the torsion spring fixing hole of the shell, and the other torsion spring claw is installed in the torsion spring fixing groove of the flip cover.

[0010] In an optional embodiment, high-strength magnets are respectively provided on the flip cover and the shell. After the flip cover is buckled onto the shell, the high-strength magnets can be attracted to each other to enable the flip cover to cover the light-through hole. Magnet fixing holes are respectively provided on the shell and the flip cover.

[0011] In an optional embodiment, a long bolt is provided between the flip cover and the shell, a connecting block is provided on the shell, the connecting block includes a through-hole block and a screw-fixing block, and the long bolt passes through the through-hole block and the torsion spring in sequence and is screwed on the screw-fixing block.

[0012] In an optional embodiment, the resilience of the torsion spring is smaller than the magnetic attraction of the high-strength magnet.

[0013] In an optional embodiment, a drawer assembly is installed in the lens cavity, the protective lens is installed on the drawer assembly, and the drawer assembly is detachably mounted on the shell via a knurled screw.

[0014] In an optional embodiment, the drawer assembly includes a drawer frame, a pan-seal ring is provided between the protective mirror and the drawer frame, and the backflow ring is installed on the other side of the protective mirror opposite to the pan-seal ring.

[0015] In an optional embodiment, the protective lens is pressed into the lens cavity by a stainless steel pressing ring, and a polytetrafluoroethylene gasket is installed on the stainless steel pressing ring, and the gasket contacts and cooperates with the cavity wall of the lens cavity.

[0016] In an optional embodiment, the backflow ring is screwed onto the shell, a sealing ring is provided between the shell and the backflow ring, and a plurality of air inlet holes are provided on the backflow ring at a position located in the purge ring cavity, and the plurality of air inlet holes are evenly spaced around the circumference of the backflow ring.

[0017] By providing a flip-up buckle cover on the mounting shell of the protective mirror, the light hole on the shell can be avoided during operation to maintain normal laser light transmission. At the same time, the light hole on the shell can be shielded in the non-working state. Combined with installing the protective mirror in the lens cavity inside the shell, the protective mirror can be effectively protected to prevent external dust from entering the working space of the protective mirror.

[0018] The backflow ring installed in the lens cavity can guide the purge protective gas into the purge ring cavity. During operation, the purge protective gas can be discharged outward, so that the buckle cover avoids the light hole, ensuring that the protective lens part can be in a state of external purge in real time to prevent external dust from entering.

[0019] The lens protection device for laser processing of the utility model can protect the lens of the protective mirror from being contaminated during and after work, has a simple structure, is easy to use and has a good protection effect.

[0020] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 This is a schematic diagram of the internal structure of the lens protection device for laser processing in this application;

[0023] Figure 2 Schematic diagram of the external structure of the buckle cover in the open state;

[0024] Figure 3 It is a structural schematic diagram of the shell end face;

[0025] Figure 4 It is a schematic diagram of the main structure of the buckle cover;

[0026] Figure 5 It is a side view structural diagram of the buckle cover;

[0027] Figure 6 It is a structural diagram of a right-handed torsion spring;

[0028] Figure 7 It is a structural diagram of a left-handed torsion spring;

[0029] Figure 8 Schematic diagram of the structure of the backflow ring;

[0030] Figure 9 This is a schematic diagram of the working state of the lens protection device for laser processing;

[0031] Figure 10 This is a schematic diagram of the status of the lens protection device for laser processing in the non-working state.

[0032] icon:

[0033] 101-housing; 1011-torsion spring fixing hole; 1012-housing magnet fixing hole;

[0034] 102-backflow ring; 1021-air inlet;

[0035] 103-backflow ring sealing ring; 104-intake joint;

[0036] 201-washer; 202-stainless steel pressure ring; 203-protective mirror; 204-pan seal; 205-drawer frame; 206-knurled screw;

[0037] 401- flip cover; 4011- torsion spring fixing slot; 4012- flip cover magnet fixing hole;

[0038] 402-high-strength magnet; 403-long bolt; 404-right-hand torsion spring; 405-left-hand torsion spring. DETAILED DESCRIPTION

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0040] In the description of this application, it should be noted that the terms "inner" and "outer" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended solely to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" and the like are used solely for distinction and should not be construed as indicating or implying relative importance.

[0041] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0042] The laser processing lens protection device in this application is mainly used to protect laser cutting lenses. By setting up necessary structures to ensure the protection of the lenses during normal operation and non-working conditions, it prevents external dust from entering the installation chamber of the laser cutting lens, thereby effectively protecting the laser cutting lens.

[0043] See also Figure 1 , and combined with Figure 2-Figure 10 The lens protection device for laser processing in the present invention is mounted on the housing 101 where the protective lens 203 is mounted. The housing 101 is provided with a light hole through which the laser can pass for normal cutting and welding operations. By mounting the protective lens 203 in the lens cavity inside the housing 101 and attaching a reversible cover to the housing 101, the light hole on the housing 101 can be shielded or avoided by flipping the cover, allowing the laser to pass during operation. In combination with a purge assembly provided on the housing 101, the protective lens 203 is purged, causing the purge gas to flow outward through the protective lens 203, preventing external dust from entering the lens cavity.

[0044] At the same time, when not in operation, the light hole can be covered by a buckle cover to protect the protective mirror 203, isolate the lens cavity from the external environment, and effectively prevent dust from entering the lens cavity.

[0045] The purge assembly on the housing 101 mainly includes a backflow ring 102 installed in the lens cavity. A purge ring cavity is provided between the backflow ring 102 and the lens cavity. External purge protective gas is mainly purged outward from the purge ring cavity through the backflow ring 102.

[0046] An air inlet connector 104 is connected to the shell 101, which is mainly used to introduce external purge protective gas. The air inlet connector 104 is connected to the lens cavity, and the external purge protective gas can be introduced into the lens cavity. The air inlet position of the air inlet connector 104 corresponds to the position of the purge ring cavity. During operation, the protective mirror 203 can be purged while the buckle cover is flipped outward to avoid the light hole, thereby forming a heat dissipation and protection effect.

[0047] In one specific embodiment, the cover includes a flip cover plate 401 connected to the housing 101 via a torsion spring. The light hole is provided on the side of the housing 101, and the cover portion of the flip cover plate 401 is positioned opposite the light hole. The light hole can be covered or avoided by flipping the flip cover plate 401.

[0048] Furthermore, the torsion spring in this embodiment includes a left-handed torsion spring 405 and a right-handed torsion spring 404 arranged on the left and right sides of the flip cover 401. Through the cooperation of the two torsion springs, the flip cover 401 can be rotated 180° on the side of the shell 101, wherein both the left-handed torsion spring 405 and the right-handed torsion spring 404 are provided with two torsion spring claws, one of which is fixed in the shell 101, preferably inserted into the torsion spring fixing hole 1011 of the shell 101, and the other torsion spring claw is installed in the torsion spring fixing groove 4011 of the flip cover 401. Through the elastic force of the torsion spring itself, the position of the flip cover 401 can be fixed after it is flipped into place.

[0049] In order to ensure the stability and reliability of the flip cover 401 when it is not in operation and to prevent the flip cover 401 from expanding outward under the elastic tendency of the torsion spring, high-strength magnets 402 are respectively provided on the flip cover 401 and the shell 101. After the flip cover 401 is buckled on the shell 101, the high-strength magnets 402 can be attracted to each other to enable the flip cover 401 to cover the light hole. Magnet fixing holes are respectively provided on the shell 101 and the flip cover 401, and the high-strength magnets 402 are installed in the magnet fixing holes.

[0050] Specifically, the magnet fixing holes include a shell magnet fixing hole 1012 and a flip cover magnet fixing hole 4012. Furthermore, the shell magnet fixing hole 1012 is arranged on the end face of the shell 101 and is arranged corresponding to the flip cover magnet fixing hole 4012, so that after the flip cover 401 is flipped over, the flip cover 401 can be fixed on the shell 101 through the magnetic attraction of the high-strength magnet 402.

[0051] From the perspective of installing the flip cover 401, a long bolt 403 is installed between the flip cover 401 and the housing 101. The housing 101 is provided with a connecting block, which includes a through-hole block and a screw-fixing block. The through-hole block and the screw-fixing block are respectively fixed to either side of the housing 101. The long bolt 403 sequentially passes through the through-hole block and the torsion spring and is screwed onto the screw-fixing block. During the specific connection process, the long bolt 403 sequentially passes through the light hole in the through-hole block, the right-handed torsion spring 404, the flip cover 401, the left-handed torsion spring 405, and the threaded hole in the screw-fixing block, forming an angular rebound force. Furthermore, the rebound force of the torsion spring in the present invention is less than the magnetic attraction of the high-strength magnet 402.

[0052] The operating principle of flip cover 401 is that during normal operation, flip cover 401 is open, and right-handed torsion spring 404 and left-handed torsion spring 405 are in their normal initial positions. At this point, flip cover 401 generates a downward rotation force, and the torsion springs resist the rotational force, preventing it from rotating downward. At this point, the laser operates normally. When the laser is finished, flip cover 401 is rotated 180 degrees. At this point, the high-strength magnet 402 fixed to the housing 101 and the high-strength magnet 402 fixed within flip cover 401 attract each other, achieving the snap-on protection.

[0053] During use, the bottom end of the torsion spring is fixed to the housing 101, and the other end of the torsion spring is installed in the flip cover 401, which causes the flip cover 401 to rotate around the center of the torsion spring. When the flip cover 401 begins to rotate around the center of the torsion spring, the torsion spring quickly pulls it back to its original position, which generates a rotational force and converts the generated rotational force into the required resistance. In this way, the torsion spring can statically fix the flip cover 401 by storing or releasing this energy, achieving the effect of flipping the cover during normal operation. At the same time, at the end of the work, because the force of the torsion spring's rebound force is less than the suction value of the high-strength magnet 402, after the flip cover 401 is manually buckled, the flip cover 401 is adsorbed on the end face of the housing 101, thereby achieving the effect of protecting the mirror 203 from contamination after the work is completed.

[0054] In another specific embodiment, a drawer assembly is installed in the lens cavity of the shell 101 for installing the protective lens 203. Specifically, the drawer assembly is detachably mounted on the shell 101 by a knurled screw 206. When installing or disassembling, the knurled screw 206 can be loosened or tightened by hand, which facilitates the replacement of the protective lens 203 on the shell 101 by the drawer assembly.

[0055] The drawer assembly includes a drawer frame 205, and a universal seal ring 204 is arranged between the protective lens 203 and the drawer frame 205. When the drawer assembly is inserted into the lens cavity, the universal seal ring 204 is compressed to form a tightly fitting installation relationship, and a certain force value is exerted during the insertion and removal process to ensure the sealing effect.

[0056] With the protective mirror 203 as the boundary, the backflow ring 102 is installed on the other side of the protective mirror 203 relative to the pan seal 204, thereby preventing the purge protective gas from flowing back to the other side of the protective mirror 203 and preventing dust from entering the lens cavity.

[0057] The protective mirror 203 is pressed into the lens cavity by the stainless steel pressure ring 202 to ensure that the protective mirror 203 is firmly installed in the lens cavity. At the same time, in order to prevent an over-tight fit, a polytetrafluoroethylene gasket 201 is installed on the stainless steel pressure ring 202. The gasket 201 contacts and cooperates with the cavity wall of the lens cavity, which can play a certain fine-tuning effect, ensuring smooth insertion and removal of the drawer assembly and ensuring a certain sealing effect.

[0058] In order to facilitate the outward extraction of the protective purge gas, the backflow ring 102 is threadedly connected to the bottom of the shell 101, and a backflow ring sealing ring 103 is provided between the shell 101 and the backflow ring 102 to enhance the sealing performance of the installation part of the backflow ring 102.

[0059] The backflow ring 102 in this embodiment is specifically an inverted cone-shaped structure, located in the purge ring cavity. Preferably, a plurality of air inlet holes 1021 are provided in the pointed cone ring portion of the backflow ring 102 , and the plurality of air inlet holes 1021 are evenly spaced around the circumference of the backflow ring 102 .

[0060] The air inlet connector 104 can be installed with an air pipe of universal diameter. The external purge protective gas introduced through the air inlet connector 104 can be evenly discharged through multiple air inlet holes 1021, ensuring that the purge protective gas always flows through the protective mirror 203 to prevent external dust from entering.

[0061] During normal operation, the buckle cover is opened to expose the light hole in the middle; when the work is completed, the buckle cover is buckled to prevent dust from entering the lens cavity through the light hole and affecting the internal lens.

[0062] The laser processing lens protection device of the present invention has a simple structure, easy functions, and has a good protective effect on the protective lens 203.

[0063] It should be noted that, unless there is any conflict, the features in the embodiments of this application can be combined with each other.

[0064] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A lens protection device for laser processing, mounted on a housing of a protective lens, characterized in that: A lens cavity for mounting a protective lens is provided inside the housing, and a flip-up buckle cover is connected to the housing, and the buckle cover can cover or avoid the light hole on the housing; A backflow ring is installed in the lens cavity, a purge ring cavity is set between the backflow ring and the lens cavity, the shell is connected to an air inlet connector, the air inlet connector is communicated with the lens cavity, and the air inlet position corresponds to the position of the purge ring cavity.

2. The laser processing lens protection device according to claim 1, wherein: The buckle cover includes a flip cover plate, which is connected to the shell through a torsion spring. The light hole is arranged on the side of the shell, and the buckle cover part of the flip cover plate is arranged opposite to the position of the light hole.

3. The laser processing lens protection device according to claim 2, wherein: The torsion spring includes a left-handed torsion spring and a right-handed torsion spring arranged on both sides of the flip cover. The left-handed torsion spring and the right-handed torsion spring are each provided with two torsion spring claws, one of which is inserted into the torsion spring fixing hole of the shell, and the other torsion spring claw is installed in the torsion spring fixing groove of the flip cover.

4. The laser processing lens protection device according to claim 2, wherein: High-strength magnets are respectively provided on the flip cover and the shell. After the flip cover is buckled onto the shell, the high-strength magnets can be attracted to each other to enable the flip cover to cover the light hole. Magnet fixing holes are respectively provided on the shell and the flip cover.

5. The laser processing lens protection device according to claim 4, wherein: A long bolt is provided between the flip cover and the shell, and a connecting block is provided on the shell. The connecting block includes a through-hole block and a screw-fixing block. The long bolt passes through the through-hole block and the torsion spring in sequence and is screwed on the screw-fixing block.

6. The laser processing lens protection device according to claim 4, wherein: The resilience of the torsion spring is smaller than the magnetic attraction of the high-strength magnet.

7. The laser processing lens protection device according to claim 1, wherein: A drawer assembly is installed in the lens cavity, the protective lens is installed on the drawer assembly, and the drawer assembly is detachably installed on the shell through a knurled screw.

8. The laser processing lens protection device according to claim 7, wherein: The drawer assembly includes a drawer frame, a pan seal is provided between the protective mirror and the drawer frame, and the backflow ring is installed on the other side of the protective mirror opposite to the pan seal.

9. The laser processing lens protection device according to claim 8, wherein: The protective lens is pressed into the lens cavity through a stainless steel pressing ring. A gasket made of polytetrafluoroethylene is installed on the stainless steel pressing ring. The gasket contacts and cooperates with the cavity wall of the lens cavity.

10. The laser processing lens protection device according to any one of claims 1 to 9, characterized in that: The backflow ring is screwed onto the shell, a sealing ring is provided between the shell and the backflow ring, a plurality of air inlet holes are provided on the backflow ring at the position of the purge ring cavity, and the plurality of air inlet holes are evenly spaced around the circumference of the backflow ring.

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