Sealing protection window for high-power laser equipment

Abstract

The utility model relates to the technical field of additive manufacturing, in particular to a sealing protection window for high-power laser equipment, which comprises a protection unit, the protection unit comprises a plurality of protection windows, and the number of the protection windows is in one-to-one correspondence according to the number of lens groups of 3D printing equipment. The protection window is locked through the sealing unit and then clamped in the middle of the protection unit, the protection unit is of a sealing structure, and a cavity is formed in the middle of the protection unit. Compared with the prior art, the technical scheme provided by the utility model has the following beneficial effects that the processing cabin is better sealed by the protection unit, a plurality of protection windows are arranged in a limited space, light beams of each lens group can be correspondingly transmitted into the forming cabin, and meanwhile, the dustproof performance is improved; the protection window is clamped through a sealing ring fixed by a nut, so that the glass of the protection window is easier to replace when being damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of additive manufacturing, and in particular to a sealed protective window for high-power laser equipment. Background Art

[0002] The core working area of metal 3D printing is the build chamber, which maintains an oxygen-free environment and requires excellent airtightness and positive pressure protection. The laser light source is located outside the build chamber and enters through a protective window on the top. While ensuring full laser penetration, the window also forms an integral seal around the chamber and must be free of deformation. Existing metal 3D printing equipment mostly uses laser input in the 100-watt range. With advancements in technology and processes, kilowatt-class lasers are beginning to be used in metal 3D printing to improve processing efficiency. Multiple lasers can also be integrated into a single device.

[0003] High-power lasers generate more smoke and disperse higher, requiring additional dust protection measures for lens protection, a problem currently unavailable in existing equipment. Furthermore, multi-laser systems require optimal size and layout, while also ensuring airtightness, field of view, and stability. Existing technology also fails to address this technical issue. Utility Model Content

[0004] The purpose of the utility model is to solve the deficiencies of the prior art and to provide a protective structure with better dustproof performance and better air tightness.

[0005] To achieve the above-mentioned object, the utility model provides a sealed protective window for high-power laser equipment, comprising:

[0006] The protection unit includes a plurality of protection windows. The number of the protection windows is set in a one-to-one correspondence according to the number of lens groups of the 3D printing device. The protection windows are locked by the sealing unit and then clamped in the middle of the protection unit. The protection unit is a sealed structure, and the middle of the protection unit is a cavity.

[0007] Preferably, the protection unit is fixedly arranged at the bottom of the optical platform, the optical platform is used to fix the lens group, the lens group is fixed on the upper surface of the optical platform and corresponds to any of the protection windows in the vertical direction.

[0008] Preferably, the sealing unit includes a first sealing ring and a second sealing ring, the first sealing ring is arranged on the upper surface of the protective window, and the second sealing ring is arranged on the lower surface of the protective window, and the first sealing ring and the second sealing ring are a quadrilateral frame structure with chamfered corners.

[0009] Preferably, the first sealing ring and the second sealing ring are arranged closely against the protection window, and the first sealing ring and the second sealing ring are locked by a nut.

[0010] Preferably, the protection unit is further provided with a protection gas interface, which is arranged on one side of the protection unit and is located at the bottom of the protection window in the vertical direction.

[0011] Preferably, the plurality of protection windows divide the protection unit into two sealed cavities, an upper sealed cavity and an lower sealed cavity, and the protection gas interface is used to introduce protection gas into the sealed cavity under the protection windows.

[0012] Compared with the existing technology, the technical solution proposed in this application has the following beneficial effects: the protection unit of the utility model better seals the processing chamber, and arranges multiple protection windows in a limited space, so that the light beam of each mirror group can be transmitted to the molding chamber accordingly, and at the same time improves the dustproof performance. The protection window is clamped by a sealing ring fixed by a nut, which makes it easier to replace the glass of the protection window when it is damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Other features, objects and advantages of the present invention will become more apparent from the detailed description of the non-limiting embodiments with reference to the following drawings:

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the protective window arrangement of an embodiment of the present utility model;

[0016] Figure 3 For this utility model Figure 1 A partial enlarged view of

[0017] Figure 4 A top view of a protection unit according to another embodiment of the present invention;

[0018] Figure 5 A side view of a protection unit according to another embodiment of the present invention;

[0019] In the figure: 1. Lens assembly, 2. Optical platform, 3. Protection unit, 4. First sealing ring, 5. Second sealing ring, 6. Protection window, 7. Protection gas interface, 8. Molding chamber. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe and discuss the technical solutions in the embodiments of the present invention in conjunction with the drawings of the present invention. Obviously, what is described here is only a part of the examples of the present invention, not all the examples. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a central component. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are intended only to describe specific embodiments and are not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] See also Figures 1 to 5The utility model provides a sealed protective window for high-power laser equipment, comprising: a protective unit, the protective unit comprising a plurality of protective windows, the number of the protective windows being arranged in a one-to-one correspondence according to the number of lens groups of the 3D printing equipment, and the number of lasers and protective windows being adjustable according to the equipment design and the lens spacing. The protective window is locked by the sealing unit and then clamped to the middle of the protective unit. The protective unit is a sealed structure, and the middle of the protective unit is a cavity. The protective unit is fixedly arranged at the bottom of an optical platform, and the optical platform is used to fix the lens group. The lens group is fixed to the upper surface of the optical platform and corresponds to any of the protective windows in the vertical direction. The sealing unit comprises a first sealing ring and a second sealing ring, the first sealing ring being arranged on the upper surface of the protective window, and the second sealing ring being arranged on the lower surface of the protective window, and the first sealing ring and the second sealing ring being a quadrilateral frame structure with chamfered corners. The first sealing ring and the second sealing ring are arranged tightly against the protective window, and the first sealing ring and the second sealing ring are locked by a nut. The first sealing ring and the second sealing ring provide dual airtightness protection. The protection unit is also provided with a protective gas interface, which is arranged on one side of the protection unit and is located at the bottom of the protection window in the vertical direction. Several protective windows divide the protection unit into two sealed cavities, upper and lower. The protective gas interface is used to introduce protective gas into the sealed cavity under the protection window. The filtered protective gas enters from the interface and forms a positive pressure slightly equal to the cabin pressure in the cavity structure under the protection window, preventing dust and smoke from contacting and contaminating the protective glass, and cooling it to eliminate thermal deformation. At the same time, this structure protects the lens closer to the lens light outlet, which can achieve a smaller size and improve the compactness of the overall layout. The protective lens is a square lens that is convenient for multi-lens layout. In order to adapt to the stability under high-power, high-temperature and pressure conditions, high-purity fused quartz is used, double-sided coating, to ensure laser transmittance T>99.9. The surface flatness is within 0.1mm, and the aperture number is strictly controlled. At the same time, the thickness / length ratio is increased to improve physical stability.

[0024] The above describes specific embodiments of the present invention. It should be understood that the present invention is not limited to the specific embodiments described above, and that one or more of the above embodiments may be combined. Those skilled in the art may make various changes, modifications, or combinations within the scope of the claims, without affecting the essence of the present invention. Unless there is a conflict, the embodiments of the present application and the features in the embodiments may be combined with each other in any manner.

Claims

1. A sealed protective window for high-power laser equipment, characterized in that: include The protection unit includes a plurality of protection windows. The number of the protection windows is set in a one-to-one correspondence according to the number of lens groups of the 3D printing device. The protection windows are locked by the sealing unit and then clamped in the middle of the protection unit. The protection unit is a sealed structure, and the middle of the protection unit is a cavity.

2. The sealed protective window for high-power laser equipment according to claim 1, characterized in that: The protection unit is fixedly arranged at the bottom of the optical platform. The optical platform is used to fix the lens group. The lens group is fixed on the upper surface of the optical platform and corresponds to any of the protection windows in the vertical direction.

3. The sealed protective window for high-power laser equipment according to claim 2, characterized in that: The sealing unit includes a first sealing ring and a second sealing ring. The first sealing ring is arranged on the upper surface of the protection window, and the second sealing ring is arranged on the lower surface of the protection window. The first sealing ring and the second sealing ring are quadrilateral frame structures with chamfered corners.

4. The sealed protective window for high-power laser equipment according to claim 3, characterized in that: The first sealing ring and the second sealing ring are arranged closely against the protection window, and the first sealing ring and the second sealing ring are locked by a nut.

5. The sealed protective window for high-power laser equipment according to claim 4, characterized in that: The protection unit is further provided with a protection gas interface, which is arranged on one side of the protection unit and is located at the bottom of the protection window in the vertical direction.

6. The sealed protective window for high-power laser equipment according to claim 5, characterized in that: The plurality of protection windows divide the protection unit into two sealed cavities, an upper sealed cavity and an lower sealed cavity. The protection gas interface is used to introduce protection gas into the sealed cavity under the protection windows.

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