Online protection laser cladding device based on multi-layer protection air curtain structure

Abstract

The utility model relates to an on-line protection laser cladding device based on a multi-layer protection gas curtain structure, which belongs to the technical field of laser additive repair and comprises a gas nozzle, a layered structure is arranged in the gas nozzle, and a protection structure is arranged on the outer wall of the gas nozzle. The protection structure comprises an outer mounting ring fixedly mounted on the outer wall of the gas nozzle, and two thermal insulation mounting plates are movably mounted on the peripheral wall of the outer mounting ring. According to the on-line protection laser cladding device based on the multi-layer protection air curtain structure, through a heat insulation mounting plate mounted on the outer peripheral wall of an outer mounting ring, a heat insulation top plate fixedly mounted on the outer wall of the heat insulation mounting plate through fastening screws, and through the action of four heat insulation side plates, the heat insulation mounting plate is fixed to the outer peripheral wall of the outer mounting ring; and the inert gas input pipe, the first cooling water pipe and the second cooling water pipe are effectively protected, and the influence of reflected high temperature on the pipeline is greatly reduced, so that the gas nozzle is effectively cooled, and the service life of the gas nozzle is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of laser additive repair technology, specifically to an online protective laser cladding device based on a multi-layer protective air curtain structure. Background Technology

[0002] Laser melting deposition modeling (LMD) is based on the principle of rapid prototyping, enabling the rapid fabrication of parts of arbitrary shapes without the need for molds or tooling. Discrete slice data of the metal solid model is processed by a computer numerical control system, through laser melting and rapid solidification of the metal material layer by layer, directly producing high-performance "near-net-shape" metal parts with rapid solidification microstructure characteristics. The advantages of LMD include its ability to fabricate large parts with superior mechanical properties compared to forging standards, and greater flexibility in material selection.

[0003] However, during the cladding process, the interaction between the high-energy laser beam and the substrate and cladding material generates extremely high temperatures, causing a significant increase in the internal temperature of the device. To ensure cladding quality and stable equipment operation, cooling treatment of the device's interior is necessary.

[0004] However, currently, water pipes and gas pipes are usually installed outside the device, which causes the reflected high temperature to act directly on these pipes. This can easily lead to problems such as the temperature of the protective gas rising and the protective effect decreasing after the gas pipes are heated, and the temperature of the cooling water rising and the cooling efficiency decreasing after the water pipes are heated. These problems can affect the quality of the cladding layer and the service life of the equipment. Therefore, an online protective laser cladding device based on a multi-layer protective air curtain structure is proposed to solve the problems mentioned above. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides an online protective laser cladding device based on a multi-layer protective air curtain structure. This device has advantages such as improved service life of the laser cladding device. It solves the problem that in existing protective laser cladding devices, the water pipes and air pipes are external, causing the reflected high temperature to directly act on these pipes, which can easily cause the air pipes and water pipes to overheat, thus affecting the cooling and air supply effect of the laser cladding device.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An online protective laser cladding device based on a multi-layer protective air curtain structure includes a gas nozzle, the gas nozzle having a layered internal structure and a protective structure on its outer wall;

[0008] The protective structure includes an outer mounting ring fixedly installed on the outer wall of the gas nozzle. Two heat-insulating mounting plates are movably installed on the outer peripheral wall of the outer mounting ring. Heat-insulating top plates are movably installed on the outer walls of the two heat-insulating mounting plates on opposite sides. Two heat-insulating side plates are fixedly installed on the outer walls of the two heat-insulating top plates on opposite sides. Two fastening screws slide through the interior of the heat-insulating top plates.

[0009] Furthermore, the layered structure includes an annular distribution plate fixedly installed inside the gas nozzle, and five layered air curtains are fixedly installed inside the annular distribution plate.

[0010] Furthermore, the annular distribution plate has a number of air inlets inside, and six annular exhaust channels are formed between the five layered air curtains and the gas nozzles.

[0011] Furthermore, the gas nozzle has two air inlet chambers inside, and two inert gas input pipes are fixedly installed on the left side of the gas nozzle, with the inert gas input pipes communicating with the air inlet chambers.

[0012] Furthermore, two first cooling water pipes are fixedly installed on the outer wall of the gas nozzle, and two second cooling water pipes are fixedly installed on the outer wall of the gas nozzle.

[0013] Furthermore, a first cooling water passage is provided inside the gas nozzle, and a second cooling water passage is provided inside the gas nozzle. Two first cooling water pipes are respectively fixedly installed at both ends of the first cooling water passage, and two second cooling water pipes are respectively fixedly installed at both ends of the second cooling water pipe.

[0014] Furthermore, cable trays are fixedly installed on opposite sides of the two insulated top plates.

[0015] Furthermore, the outer mounting ring has four threaded grooves inside, and the fastening screw slides through the interior of the thermal insulation top plate and the thermal insulation mounting plate, with the fastening screw threaded into the interior of the threaded groove.

[0016] Compared with the prior art, this utility model provides an online protective laser cladding device based on a multi-layer protective air curtain structure, which has the following beneficial effects:

[0017] 1. This online protective laser cladding device based on a multi-layer protective air curtain structure, through a heat-insulating mounting plate installed on the outer peripheral wall of the outer mounting ring, and a heat-insulating top plate fixed to the outer wall of the heat-insulating mounting plate by fastening screws, effectively protects the inert gas input pipe, the first cooling water pipe and the second cooling water pipe through the action of four heat-insulating side plates, greatly reducing the impact of reflected high temperature on the pipeline, thereby effectively cooling the gas nozzle and improving the service life of the gas nozzle.

[0018] 2. This online protective laser cladding device based on a multi-layer protective gas curtain structure has a six-layer annular gas path structure inside the gas nozzle. After the inert gas passes through the gas path, it is divided into multiple layers and forms a multi-layer gas curtain on the surface of the molten pool after leaving the cladding head. These gas curtains effectively isolate oxygen, nitrogen and other active gases in the air from contact with the molten pool, preventing oxidation and nitriding of the cladding layer. At the same time, the multi-layer gas curtain structure acts as a barrier, blocking the high-temperature reflection and radiation generated by the molten pool inside, reducing the impact on the outside of the cladding head, and ensuring the stability of the laser cladding process and the high quality of the cladding layer. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural schematic diagram of the present utility model;

[0020] Figure 2 This is a schematic diagram of the gas nozzle structure of this utility model;

[0021] Figure 3 This is a cross-sectional view of the gas nozzle of this utility model;

[0022] Figure 4 This is a schematic diagram of the connection structure between the thermal insulation top plate and the wire harness seat of this utility model.

[0023] In the diagram: 1. Gas nozzle; 2. Inert gas inlet pipe; 3. Annular distribution plate; 4. Layered air curtain; 5. First cooling water pipe; 6. Second cooling water pipe; 7. Outer mounting ring; 8. Thermal insulation mounting plate; 9. Thermal insulation top plate; 10. Thermal insulation side plate; 11. Fastening screw; 12. Cable harness holder; 13. First cooling water passage; 14. Second cooling water passage. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1 to 4 The online protective laser cladding device based on a multi-layer protective air curtain structure in this embodiment includes a gas nozzle 1. The gas nozzle 1 has a layered structure inside and a protective structure on the outer wall of the gas nozzle 1.

[0026] In this embodiment, the gas nozzle 1 has two air inlet chambers inside, and two inert gas input pipes 2 are fixedly installed on the left side of the gas nozzle 1. The inert gas input pipes 2 are connected to the air inlet chambers. Two first cooling water pipes 5 and two second cooling water pipes 6 are fixedly installed on the outer wall of the gas nozzle 1.

[0027] It should be noted that the first cooling water pipe 5 and the second cooling water pipe 6 respectively provide heat dissipation for the inside and outside of the gas nozzle 1.

[0028] In this embodiment, a first cooling water passage 13 is provided inside the gas nozzle 1, a second cooling water passage 14 is provided inside the gas nozzle 1, two first cooling water pipes 5 are fixedly installed at both ends of the first cooling water passage 13, and two second cooling water pipes 6 are fixedly installed at both ends of the second cooling water pipes 6.

[0029] It should be noted that the gas nozzle 1 is cooled by the first cooling water channel 13 and the second cooling water channel 14.

[0030] In this embodiment, the layered structure includes an annular distribution plate 3 fixedly installed inside the gas nozzle 1. Five layered air curtains 4 are fixedly installed inside the annular distribution plate 3. Multiple air inlets are opened inside the annular distribution plate 3. Six annular exhaust grooves are formed between the five layered air curtains 4 and the gas nozzle 1.

[0031] It should be noted that the layered air curtain 4 effectively isolates the contact between oxygen and nitrogen active gases in the air and the molten pool, preventing oxidation and nitriding of the cladding layer.

[0032] In this embodiment, the protective structure includes an outer mounting ring 7 fixedly installed on the outer wall of the gas nozzle 1. Two heat-insulating mounting plates 8 are movably installed on the outer peripheral wall of the outer mounting ring 7. Heat-insulating top plates 9 are movably installed on the outer walls of the two heat-insulating mounting plates 8 on opposite sides. Two heat-insulating side plates 10 are fixedly installed on the outer walls of the two heat-insulating top plates 9 on opposite sides. Two fastening screws 11 slide through the interior of the heat-insulating top plates 9. Four threaded grooves are opened inside the outer mounting ring 7. The fastening screws 11 slide through the interior of the heat-insulating top plates 9 and the heat-insulating mounting plates 8. The fastening screws 11 are threaded into the interior of the threaded grooves.

[0033] It should be noted that the thermal insulation mounting plate 8 and the thermal insulation top plate 9 are installed by means of the fastening screws 11, which also facilitates the disassembly and replacement of the thermal insulation mounting plate 8, the thermal insulation top plate 9 and the thermal insulation side plate 10.

[0034] In this embodiment, a cable tie 12 is fixedly installed on one side of each of the two thermal insulation top plates 9.

[0035] It should be noted that the first cooling water pipe 5 and the second cooling water pipe 6 are bound by the cable tie 12 to prevent them from getting tangled.

[0036] The working principle of the above embodiments is as follows:

[0037] First, the two thermal insulation mounting plates 8 are movably installed on the top of the outer mounting ring 7. Then, the two thermal insulation top plates 9 are installed on opposite sides of the two thermal insulation mounting plates 8. The fastening screws 11 are then slid through the interior of the thermal insulation top plates 9 and the thermal insulation mounting plates 8. Finally, the fastening screws 11 are threaded into the interior of the outer mounting ring 7. This completes the installation of the thermal insulation mounting plates 8, the thermal insulation top plates 9, and the thermal insulation side plates 10. Finally, the first cooling water pipe 5 and the second cooling water pipe 6 are installed inside the cable tie 12 and connected to the gas nozzle 1.

[0038] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods, and any method that can achieve its beneficial effects can be implemented.

[0039] It should be noted that the orientations or positional relationships indicated herein are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the purpose of facilitating the description of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An online protective laser cladding device based on a multi-layer protective air curtain structure, comprising a gas nozzle (1), characterized in that: The gas nozzle (1) has a layered structure inside and a protective structure on its outer wall. The protective structure includes an outer mounting ring (7) fixedly installed on the outer wall of the gas nozzle (1). Two heat-insulating mounting plates (8) are movably installed on the outer peripheral wall of the outer mounting ring (7). A heat-insulating top plate (9) is movably installed on the outer wall of the two heat-insulating mounting plates (8) on opposite sides. Two heat-insulating side plates (10) are fixedly installed on the outer wall of the two heat-insulating top plates (9). Two fastening screws (11) slide through the interior of the heat-insulating top plate (9).

2. The online protective laser cladding device based on a multi-layer protective air curtain structure according to claim 1, characterized in that: The layered structure includes an annular distribution plate (3) fixedly installed inside the gas nozzle (1), and five layered air curtains (4) are fixedly installed inside the annular distribution plate (3).

3. The online protective laser cladding device based on a multi-layer protective air curtain structure according to claim 2, characterized in that: The annular distribution plate (3) has a number of air inlets inside, and six annular exhaust grooves are formed between the five layered air curtains (4) and the gas nozzles (1).

4. The online protective laser cladding device based on a multi-layer protective air curtain structure according to claim 1, characterized in that: The gas nozzle (1) has two air inlet chambers inside. Two inert gas input pipes (2) are fixedly installed on the left side of the gas nozzle (1) and are connected to the air inlet chambers.

5. The online protective laser cladding device based on a multi-layer protective air curtain structure according to claim 1, characterized in that: Two first cooling water pipes (5) are fixedly installed on the outer wall of the gas nozzle (1), and two second cooling water pipes (6) are fixedly installed on the outer wall of the gas nozzle (1).

6. The online protective laser cladding device based on a multi-layer protective air curtain structure according to claim 5, characterized in that: The gas nozzle (1) has a first cooling water passage (13) inside and a second cooling water passage (14) inside. Two first cooling water pipes (5) are fixedly installed at both ends of the first cooling water passage (13), and two second cooling water pipes (6) are fixedly installed at both ends of the second cooling water pipe (6).

7. The online protective laser cladding device based on a multi-layer protective air curtain structure according to claim 1, characterized in that: A cable tie (12) is fixedly installed on one side of each of the two thermal insulation top plates (9).

8. The online protective laser cladding device based on a multi-layer protective air curtain structure according to claim 1, characterized in that: The outer mounting ring (7) has four threaded grooves inside. The fastening screw (11) slides through the interior of the heat insulation top plate (9) and the heat insulation mounting plate (8). The fastening screw (11) is threaded into the interior of the threaded groove.

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