A center wire and powder feeding nozzle for laser additive

Abstract

The utility model belongs to high -speed laser cladding technical field especially is a kind of center wire feeding powder feeding nozzle for laser additive, including nozzle main part, pass through the nozzle, wire feeding plug and powder feeding plug, the inside left and right sides of nozzle main part are all provided with light hole;The central position of nozzle main part is provided with the fixed hole for fixing and limiting pass through the nozzle;Pass through the nozzle can be movably placed in the inside bottom end of fixed hole, the central position of pass through the nozzle is provided with the inner hole for wire passing;The upper end of fixed hole is screw-connected with wire feeding plug;The inside perimeter of nozzle main part is provided with several water inlet channels;The rear end inside of nozzle main part is provided with powder inlet channel;The upper end of powder inlet channel is screw-connected with powder feeding plug, the utility model set wire feeding powder integration, it can be used for wire feeding, also can be used for powder feeding, when wire feeding, remove wire feeding plug, retain powder feeding plug, when powder feeding, then remove powder feeding plug, retain wire feeding plug.

Description

Technical Field

[0001] This utility model belongs to the field of high-speed laser cladding technology, specifically relating to a center wire and powder feeding nozzle for laser additive manufacturing. Background Technology

[0002] High-speed laser cladding is a widely used metal surface modification technology, which is widely used for surface strengthening of parts (improving wear resistance, corrosion resistance and other properties) and repair (reducing resource waste). At the same time, under the current trend of green manufacturing, clean and efficient technologies are more favored.

[0003] The nozzle of a high-speed laser cladding head is a key component of the high-speed laser head. It is through which the laser and powder / filament converge in space, determining the reliability and stability of the cladding process. Because the nozzle is very close to the molten pool, typically 10mm-30mm, the cladding process is subject to heat and light radiation at high temperatures. Therefore, a scientifically sound structural design is essential; otherwise, problems such as powder adhesion, powder blockage, high-temperature deformation, or melting may occur. Utility Model Content

[0004] To address the aforementioned problems in the existing technology, this utility model provides a central wire and powder feeding nozzle for laser additive manufacturing, which integrates wire and powder feeding. It can be used for both wire feeding and powder feeding. When feeding wire, the wire feeding plug is removed and the powder feeding plug is retained. When feeding powder, the powder feeding plug is removed and the wire feeding plug is retained.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a center wire and powder feeding nozzle for laser additive manufacturing, comprising a nozzle body, a feed nozzle, a wire feeding plug, and a powder feeding plug, wherein light-passing holes are provided on both the left and right sides inside the nozzle body; A fixing hole for fixing and restricting the material passage is provided at the center of the nozzle body; The feed nozzle is movably placed inside the bottom of the fixed hole, and an inner hole for feeding wire is opened at the center of the feed nozzle; A wire feed plug is screwed onto the upper end of the fixing hole; Several water-cooling channels are provided around the inside of the nozzle body; The nozzle body has a powder inlet channel inside its rear end, and the bottom end of the powder inlet channel is connected to the fixing hole. The upper end of the powder inlet channel is screwed with a powder feeding plug.

[0006] As a preferred technical solution of the center wire and powder feeding nozzle for laser additive manufacturing according to this utility model, the nozzle body is a conical structure, and the nozzle body is made of copper or copper alloy.

[0007] As a preferred technical solution of the center wire and powder feeding nozzle for laser additive manufacturing according to this utility model, the number of light-transmitting holes is not less than 2, the axes of the light-transmitting holes converge at point P 10mm-30mm below the nozzle body, and the angle between the axis of the light-transmitting holes and the axis of the nozzle body is in the range of 10°-30°.

[0008] As a preferred technical solution of the center filament and powder feeding nozzle for laser additive manufacturing according to this utility model, the fixing hole has a "T" shaped structure, and the fixing hole and the inner hole form a filament channel.

[0009] As a preferred technical solution of the center wire feeding and powder feeding nozzle for laser additive manufacturing according to this utility model, the powder inlet channel, the fixing hole and the inner hole form a powder channel.

[0010] As a preferred technical solution for a center wire and powder feeding nozzle for laser additive manufacturing according to this utility model, the feed nozzle is one of tungsten copper or tungsten steel.

[0011] As a preferred technical solution of the laser additive manufacturing center filament and powder feeding nozzle of this utility model, the nozzle removes the powder inlet channel and can be used as a laser additive manufacturing center filament feeding nozzle. The nozzle removes the top of the fixing hole, so that the powder inlet channel is directly connected to the fixing hole and the inner hole, and can be used as a laser additive manufacturing center powder feeding nozzle.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model mainly consists of a nozzle body, a feeding nozzle, a wire feeding plug, and a powder feeding plug. When using wire, the wire feeding plug can be removed, while the powder feeding plug is retained to seal the powder inlet channel. The wire can be fed into the beam convergence point through the fixing hole and the inner hole inside the feeding nozzle. The laser simultaneously heats the wire and the substrate to form a molten pool, and inert protective gases such as argon are blown into the molten pool to prevent oxidation. Similarly, when using powder, the powder feeding plug can be removed, while the wire feeding plug is retained to seal the wire inlet channel. The powder can be fed into the beam convergence point through the powder inlet channel and the inner hole inside the fixing hole. The laser simultaneously heats the powder and the substrate to form a molten pool, while protective gas is blown out through the light-transmitting hole to cover and protect the molten pool. Inert protective gases such as argon are blown into the molten pool to prevent oxidation. It integrates wire feeding and powder feeding, and can be used for both wire feeding and powder feeding.

[0013] 2. The feed nozzle and the main body of the nozzle of this utility model adopt a split design, which can be easily disassembled and replaced, with low maintenance cost, and at the same time, it can be used for different wire diameters and different powder amounts.

[0014] 3. The nozzle body of this utility model is an integrated copper structure and is equipped with a water cooling channel, which can withstand high temperature and has a longer service life.

[0015] 4. The feed nozzle of this utility model is preferably made of tungsten copper or tungsten steel wear-resistant material, which is wear-resistant and has a longer service life.

[0016] 5. This utility model uses central feeding, and the beam can be distributed around the filament / powder material, resulting in uniform heating, less energy required, and better molding effect. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a cross-sectional structural diagram of the present invention; Figure 2 This is a schematic diagram of the cross-sectional structure of the nozzle body of this utility model; Figure 3 This is a schematic diagram of the cross-sectional structure of the feed nozzle of this utility model; Figure 4 This is a schematic diagram of the wire feeding plug structure of this utility model; Figure 5 This is a side sectional view of the present invention. Figure 6 This is a schematic diagram of the powder feeding plug structure of this utility model; Figure 7 This is a top view of the nozzle body structure of this utility model; Figure 8 This is a schematic diagram of the wire feeding mechanism of this utility model; Figure 9 This is a schematic diagram of the powder feeding process of this utility model.

[0018] In the diagram: 1. Nozzle body; 11. Light passage hole; 12. Fixing hole; 13. Water cooling channel; 14. Powder inlet channel; 2. Feed nozzle; 21. Inner hole; 3. Wire feed plug; 31. Sealing ring one; 4. Powder feed plug; 41. Sealing ring two. Detailed Implementation

[0019] 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.

[0020] Example Please see Figure 1-9The present invention provides the following technical solution: a center wire and powder feeding nozzle for laser additive manufacturing, comprising a nozzle body 1, a feed nozzle 2, a wire feeding plug 3 and a powder feeding plug 4. The nozzle body 1 is an integral conical structure and is made of one of copper or copper alloy.

[0021] Reference Figure 1 , Figure 2 , Figure 7 and Figure 8 As shown, further, light-transmitting holes 11 are provided on both the left and right sides of the nozzle body 1. The number of light-transmitting holes 11 is not less than 2, and can be 3, 4, 5 or 6 as needed. The axes of the light-transmitting holes 11 converge at point P 10mm-30mm below the nozzle body 1. The angle between the axis of the light-transmitting holes 11 and the axis of the nozzle body 1 is in the range of 10°-30°, and is preferably 20° in this embodiment.

[0022] Reference Figure 1 , Figure 2 , Figure 5 , Figure 7 , Figure 8 and Figure 9 As shown, a fixing hole 12 for fixing and restricting the feed nozzle 2 is further provided at the center of the nozzle body 1. The fixing hole 12 has a "T" shaped structure.

[0023] Reference Figure 1 , Figure 3 , Figure 5 , Figure 8 and Figure 9 As shown, the feed nozzle 2 is movably placed at the bottom of the fixed hole 12. The feed nozzle 2 is one of tungsten copper or tungsten steel. The feed nozzle 2 has an inner hole 21 for feeding wire at its center. The fixed hole 12 and the inner hole 21 can form a wire channel. The inner diameter and length of the feed nozzle 2 can be adapted to the wire diameter and the amount of powder fed, and are not limited to the size shown in this embodiment. For example, if a 2.0mm diameter wire is used in this embodiment, the inner diameter of the feed nozzle 2 is 2.1mm. If powder is used, the inner diameter is preferably 1.5mm if the powder output is about 50g / min, and the inner diameter is preferably 2.0mm if the powder output is about 100g / min.

[0024] Reference Figure 1 , Figure 4 , Figure 5 and Figure 9 As shown, further, a wire feeding plug 3 is screwed onto the upper end of the fixing hole 12. The wire feeding plug 3 is made of a wear-resistant material such as tungsten copper or tungsten steel. A sealing ring 31 is fitted around the upper outer periphery of the wire feeding plug 3. The wire feeding plug 3 forms a sealed connection with the nozzle body 1 through the sealing ring 31. The sealing ring 31 is a heat-resistant rubber component. The sealing ring 31 is used to improve the sealing performance of the wire feeding plug 3 to the fixing hole 12.

[0025] Reference Figure 7 As shown, furthermore, several water-cooling channels 13 are provided around the inside of the nozzle body 1, through which coolant can be introduced for nozzle cooling.

[0026] Reference Figure 5 , Figure 7 and Figure 9 As shown, further, a powder inlet channel 14 is provided inside the rear end of the nozzle body 1, and the bottom end of the powder inlet channel 14 is connected to the fixing hole 12. The powder inlet channel 14, the fixing hole 12 and the inner hole 21 form a powder channel.

[0027] Reference Figure 5 , Figure 6 and Figure 9 As shown, further, a powder feeding plug 4 is screwed onto the upper end of the powder inlet channel 14. The powder feeding plug 4 is made of a wear-resistant material such as tungsten copper or tungsten steel. A sealing ring 41 is fitted around the bottom of the powder feeding plug 4. The powder feeding plug 4 forms a sealed connection with the nozzle body 1 through the sealing ring 41. The sealing ring 41 is a heat-resistant rubber component. The sealing ring 41 is used to improve the sealing performance of the powder feeding plug 4 to the powder inlet channel 14.

[0028] Reference Figure 8 and Figure 9 As shown, further, the nozzle can be used as a dedicated center filament feeding nozzle for laser additive manufacturing by removing the powder inlet channel 14, and can also be used as a dedicated center filament feeding nozzle for laser additive manufacturing by removing the top of the fixing hole 12 and making the powder inlet channel 14 directly connected to the fixing hole 12 and the inner hole 21.

[0029] In this implementation plan: This utility model is mainly composed of a nozzle body 1, a feed nozzle 2, a wire feeding plug 3, and a powder feeding plug 4. It integrates wire feeding and powder feeding, and can be used for both wire feeding and powder feeding. The wire feeding plug 3 is removed and the powder feeding plug 44 is retained. When feeding powder, the powder feeding plug is removed and the wire feeding plug 3 is retained.

[0030] The feed nozzle 2 and the nozzle body 1 of this utility model adopt a split design, which can be easily disassembled and replaced, with low maintenance cost, and at the same time, it can be used for different wire diameters and different powder amounts.

[0031] The nozzle body 1 of this utility model is an integral copper structure and is equipped with a water cooling channel 13, which can withstand high temperature and has a longer service life.

[0032] The feed nozzle 2 of this utility model is preferably made of tungsten copper or tungsten steel wear-resistant material, which is wear-resistant and has a longer service life.

[0033] This invention uses central feeding, allowing the beam to be distributed around the filament / powder material, resulting in uniform heating, lower energy requirements, and better molding effect.

[0034] The usage process and working principle of this utility model are as follows: Figure 6 As shown, when using filament, the filament feeding plug 3 can be removed, while the powder feeding plug 4 is retained to seal the powder inlet channel 14. The filament can be fed into the beam convergence point P through the fixing hole 12 and the inner hole 21 in the feed nozzle 2. The laser simultaneously heats the filament and the substrate to form a molten pool, and inert protective gases such as argon are blown into the molten pool to protect it from oxidation. like Figure 7 As shown, when using powder, the powder feeding plug 4 can be removed in the same way, while the wire feeding plug 3 is retained to seal the wire inlet channel. The powder can be fed into the beam convergence point P through the powder inlet channel 14, the fixing hole 12, and the inner hole 21 within the inner hole 21. The laser simultaneously heats the powder and the substrate to form a molten pool. At the same time, the protective gas is blown out through the light-transmitting hole 11 to cover the molten pool and protect it. Inert protective gases such as argon are also blown into the molten pool to prevent it from being oxidized.

[0035] In addition, all content not described in detail in this embodiment is within the scope of existing technology and common knowledge.

[0036] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A center-feeding filament and powder nozzle for laser additive manufacturing, characterized in that: It includes a nozzle body (1), a feed nozzle (2), a wire feeding plug (3) and a powder feeding plug (4). The nozzle body (1) has light-transmitting holes (11) on both the left and right sides inside. A fixing hole (12) for fixing and limiting the feed nozzle (2) is provided at the center of the nozzle body (1). The feed nozzle (2) can be movably placed inside the bottom end of the fixing hole (12), and the feed nozzle (2) has an inner hole (21) for feeding wire at the center position. The upper end of the fixing hole (12) is screwed with a wire feeding plug (3). The nozzle body (1) has several water-cooling channels (13) around its interior. The nozzle body (1) has a powder inlet channel (14) inside its rear end, and the bottom end of the powder inlet channel (14) is connected to the fixing hole (12). The powder inlet channel (14) is screwed to the upper end with a powder feeding plug (4).

2. The laser additive manufacturing center filament and powder feeding nozzle according to claim 1, characterized in that: The nozzle body (1) has a conical structure and is made of copper or copper alloy.

3. The laser additive manufacturing center wire and powder feeding nozzle according to claim 1, characterized in that: The number of light-transmitting holes (11) is not less than 2. The axes of the light-transmitting holes (11) converge at point P 10mm-30mm below the nozzle body (1). The angle between the axis of the light-transmitting holes (11) and the axis of the nozzle body (1) is 10°-30°.

4. A center-feed filament and powder nozzle for laser additive manufacturing according to claim 1, characterized in that: The fixing hole (12) has a "T" shaped structure, and the fixing hole (12) and the inner hole (21) form a wire channel.

5. A center-feed filament and powder nozzle for laser additive manufacturing according to claim 1, characterized in that: The powder inlet channel (14), together with the fixing hole (12) and the inner hole (21), form a powder material channel.

6. A center-feed filament and powder nozzle for laser additive manufacturing according to claim 1, characterized in that: The feed nozzle (2) is one of tungsten copper or tungsten steel.

7. A center-feed filament and powder nozzle for laser additive manufacturing according to claim 1, characterized in that: The nozzle can be used as a laser additive manufacturing center feed nozzle by removing the powder inlet channel (14) and removing the top of the fixing hole (12) so that the powder inlet channel (14) is directly connected to the fixing hole (12) and the inner hole (21).

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