A water-cooled high-speed coaxial annular powder feeding and cladding nozzle

Abstract

This utility model relates to the field of laser cladding technology and discloses a water-cooled high-speed coaxial annular powder feeding cladding nozzle. Two cold water pipes are welded to the outside of the cladding nozzle base. An inner nozzle is threadedly connected to the inside of the internal threaded hole. An outer nozzle is installed on the cladding nozzle base outside the inner nozzle, and an annular groove is formed on the top of the outer nozzle. In this utility model, cold water enters the annular groove of the outer nozzle through a cold water pipe, a guide hole, and a connecting hole, which can promptly remove the heat from the outer nozzle, reducing the working temperature of the inner and outer nozzles. This reduces the temperature of the powder when passing through the annular channel formed by the inner and outer nozzles, preventing the powder from sticking to the nozzle outlet due to excessive temperature, thus avoiding powder blockage or nozzle burnout. It also reduces the wear of the annular channel formed by the inner and outer nozzles when high-temperature powder passes through, avoiding the problem of poor powder aggregation, and improving the product quality and powder utilization rate of the cladding.

Description

Technical Field

[0001] This utility model relates to the field of laser cladding technology, specifically a water-cooled high-speed coaxial annular powder feeding cladding nozzle. Background Technology

[0002] In laser cladding, the coaxial annular powder feeding cladding nozzle is one of the most important components. It not only affects the quality of the cladding process, but also determines the powder utilization rate. The powder utilization rate directly determines the production cost, so designing an excellent coaxial annular powder feeding cladding nozzle is of paramount importance.

[0003] Traditional cladding nozzles are prone to powder blockage or burnout due to the combined effects of reflected light irradiation and thermal radiation from the cladding layer, especially coaxial annular powder feeding cladding nozzles without direct water cooling. Furthermore, at high temperatures, the inner surface of the coaxial annular powder feeding cladding nozzle wears faster, resulting in poorer powder aggregation and reduced powder utilization. This leads to a rough cladding surface, increased quality defects, and higher production costs. Additionally, commercially available coaxial annular powder feeding cladding nozzles have complex designs, high processing costs, and are not conducive to surface finish control, affecting powder aggregation and consequently impacting the surface quality and powder utilization of the clad products. They are also inconvenient to replace. Therefore, a water-cooled high-speed coaxial annular powder feeding cladding nozzle is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a water-cooled high-speed coaxial annular powder feeding and cladding nozzle to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a water-cooled high-speed coaxial annular powder feeding cladding nozzle, comprising a cladding nozzle base, a positioning groove is provided on the inner side of the bottom of the cladding nozzle base, an internal threaded hole is provided at the bottom of the positioning groove, two sealing ring placement grooves are provided on the positioning groove outside the internal threaded hole, four powder feeding holes are provided on the outer side of the cladding nozzle base, four powder feeding pipes are welded to the upper outer side of the cladding nozzle base, two guide holes are provided on the lower outer side of the cladding nozzle base, three connecting holes are provided on both sides of the bottom of the positioning groove between the two sealing ring placement grooves, the three connecting holes are connected to the guide holes, two cold water pipes are welded to the outer side of the cladding nozzle base, an inner nozzle is threadedly connected to the inside of the internal threaded hole, an outer nozzle is installed on the cladding nozzle base outside the inner nozzle, and an annular groove is provided on the top of the outer nozzle.

[0006] Preferably, the four powder feeding tubes are connected to four powder feeding holes, and each of the four powder feeding tubes is equipped with a first quick-connect adapter.

[0007] Preferably, the aforementioned cold water pipe is connected to the guide hole, and a second quick-connect plug is installed on both cold water pipes.

[0008] Preferably, an outer nozzle locking ring is fitted onto the outer side of the aforementioned outer nozzle, and the outer nozzle locking ring is threadedly connected to the bottom outer side of the cladding nozzle base.

[0009] Preferably, the top of the outer nozzle abuts against the inside of the positioning groove, and the connecting hole is connected to the annular groove.

[0010] Preferably, the top of the cladding nozzle substrate is provided with several threaded holes for mounting the laser head.

[0011] Preferably, the outer nozzle is fitted onto the outside of the inner nozzle.

[0012] Compared with the prior art, the present invention, by adopting the above technical solution, has the following technical effects:

[0013] 1. In this utility model, cold water enters the annular groove of the outer nozzle through a cold water pipe, a guide hole, and a connecting hole. This allows the heat on the outer nozzle to be carried away in time, reducing the working temperature of the inner and outer nozzles. Consequently, the temperature of the powder as it passes through the annular channel formed by the inner and outer nozzles is reduced. This prevents the powder from sticking to the nozzle outlet due to excessive temperature, thus avoiding powder blockage or nozzle burnout. It also reduces the wear of the annular channel formed by the inner and outer nozzles when high-temperature powder passes through it, preventing the powder from becoming less cohesive. This improves the quality of the cladding product and the utilization rate of the powder.

[0014] 2. In this invention, the powder enters the cavity formed by the inner nozzle and the cladding nozzle substrate through four powder feeding pipes and four powder feeding holes. The powder is evenly dispersed in the cavity and finally slides down along the narrow gap formed by the two smooth conical surfaces of the inner and outer nozzles and converges at a point, which improves the powder's cohesion. Moreover, the inner and outer nozzles have a simple structural design, which is very suitable for high-precision processing and can effectively reduce the consumption cost of the inner and outer nozzles.

[0015] 3. When replacing the inner and outer nozzles, this utility model allows for easy and quick replacement of the outer nozzle by rotating the outer nozzle locking ring in the opposite direction to disengage it from the outer side of the cladding nozzle base. At the same time, the inner nozzle is rotated in the opposite direction with a tool to disengage it from the inner threaded hole. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a top view of the structure of this utility model;

[0019] Figure 3 For the present utility model Figure 2 Schematic diagram of the cross-sectional structure of the middle AA section;

[0020] Figure 4 This is a schematic diagram of the bottom structure of the cladding nozzle substrate of this utility model;

[0021] Figure 5 This is a schematic diagram of the cross-sectional structure of the cladding nozzle substrate of this utility model;

[0022] Figure 6 This is a schematic diagram of the outer nozzle structure of this utility model;

[0023] Figure 7 This is a schematic diagram of the inner nozzle structure of this utility model.

[0024] Explanation of reference numerals in the attached drawings: 1. Clad nozzle base; 2. Internal threaded hole; 3. Sealing ring placement groove; 4. Powder feeding hole; 5. Powder feeding pipe; 6. First adapter quick connector; 7. Guide hole; 8. Connecting hole; 9. Cold water pipe; 10. Second adapter quick connector; 11. Inner nozzle; 12. Outer nozzle; 13. Annular groove; 14. Outer nozzle locking ring; 15. Threaded hole. Detailed Implementation

[0025] 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.

[0026] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0027] Example

[0028] Please see Figure 1-7 This utility model provides a technical solution: a water-cooled high-speed coaxial annular powder feeding cladding nozzle, including a cladding nozzle base 1, a positioning groove is provided on the inner side of the bottom of the cladding nozzle base 1, an internal threaded hole 2 is provided at the bottom of the positioning groove, and two sealing ring placement grooves 3 are provided on the positioning groove outside the internal threaded hole 2; four powder feeding holes 4 are provided on the outer side of the cladding nozzle base 1, and four powder feeding pipes 5 are welded to the upper outer side of the cladding nozzle base 1. The powder feeding pipes 5 are made of stainless steel and are fastened by laser spot welding. After fastening, AB glue is applied for sealing to ensure the airtightness and structural strength of the structure.

[0029] Two guide holes 7 are provided on the lower outer side of the cladding nozzle base 1. Three connecting holes 8 are provided on both sides of the bottom of the positioning groove between the two sealing ring placement grooves 3. The three connecting holes 8 are connected to the guide holes 7. Two cold water pipes 9 are welded to the outer side of the cladding nozzle base 1. The cold water pipes 9 are made of stainless steel and are fastened by laser spot welding. After fastening, AB glue is applied for sealing to ensure the integrity of the structure's seal and the structure's firmness.

[0030] An inner nozzle 11 is threadedly connected to the internal threaded hole 2. The inner nozzle 11 is made of chromium zirconium copper and has a knurled surface at the lower end of the thread. This knurled surface and the cladding nozzle base 1 form a cavity with a slightly larger volume. When powder is vertically sprayed onto this surface through the powder feeding hole 4, a diffusion cavity is formed, allowing the powder to be evenly dispersed within the cavity. An outer nozzle 12 is installed on the cladding nozzle base 1 outside the inner nozzle 11. An annular groove 13 is formed on the top of the outer nozzle 12. Fluororubber O-rings are installed inside the two sealing ring placement grooves 3 to ensure that the water passage of the annular groove 13 is reliable and leak-proof. The outer nozzle 12 is made of chromium zirconium copper. The powder passes through four powder feeding pipes 5 and four The powder enters the cavity formed by the inner nozzle 11 and the cladding nozzle base 1 through the powder feeding hole 4. The powder is evenly dispersed in the cavity and finally slides down along the narrow gap formed by the two smooth conical surfaces of the inner nozzle 11 and the outer nozzle 12 and converges at a point. At the same time, cold water enters the annular groove 13 of the outer nozzle 12 through a cold water pipe 9, a guide hole 7 and a connecting hole 8. This can remove the heat from the outer nozzle 12 in time, reduce the working temperature of the inner nozzle 11 and the outer nozzle 12, thereby reducing the temperature of the powder when passing through the annular channel formed by the inner nozzle 11 and the outer nozzle 12. This avoids the powder from sticking to the nozzle outlet due to excessive temperature, which could cause powder blockage or nozzle burnout.

[0031] It also reduces the wear of the annular channel formed by the inner nozzle 11 and the outer nozzle 12 due to high temperature, which makes the powder aggregation worse, thus affecting the quality of the cladding product and reducing the utilization rate of the powder.

[0032] The height of the inner nozzle 11 after installation is 0.4mm-0.5mm lower than that of the outer nozzle 12. This helps to reduce the reflected laser from hitting the inner nozzle 11, which does not have a direct water-cooling structure. More of the reflected laser is blocked by the outer nozzle 12, and the heat generated on the outer nozzle 12 can be carried away by the cooling water in time. Moreover, the surface roughness of the annular channel formed by the inner nozzle 11 and the outer nozzle 12 needs to reach 50nm-100nm to achieve a more ideal powder aggregation. Therefore, the simplification of the surface structure will greatly reduce the processing difficulty.

[0033] Four powder feeding pipes 5 are connected to four powder feeding holes 4 respectively. Each of the four powder feeding pipes 5 is equipped with a first quick-connect adapter 6. The first quick-connect adapter 6 on the powder feeding pipe 5 is connected to the powder feeding connection pipe.

[0034] The cold water pipe 9 is connected to the guide hole 7. A second quick-connect plug 10 is installed on both cold water pipes 9. The second quick-connect plugs 10 on the two cold water pipes 9 are connected to the inlet and outlet of the chiller through pipes, thus forming a cooling loop.

[0035] To facilitate the replacement of the inner nozzle 11 and the outer nozzle 12, an outer nozzle locking ring 14 is fitted onto the outer side of the outer nozzle 12. The outer nozzle locking ring 14 is threaded to the bottom outer side of the cladding nozzle base 1. The top of the outer nozzle 12 abuts against the inside of the positioning groove. The outer nozzle 12 is fitted onto the outside of the inner nozzle 11. The connecting hole 8 is connected to the annular groove 13. When replacing the inner nozzle 11 and the outer nozzle 12, the outer nozzle locking ring 14 is rotated in the opposite direction to disengage it from the outside of the cladding nozzle base 1. At this time, the outer nozzle 12 can be replaced. At the same time, the inner nozzle 11 is rotated in the opposite direction with a tool to disengage it from the inside of the internal threaded hole 2. Thus, the inner nozzle 11 and the outer nozzle 12 can be replaced.

[0036] The top of the cladding nozzle base 1 is provided with several threaded holes 15. The threaded holes 15 are used for the installation of the laser head. By fixing the cladding nozzle base 1 to the screw on the laser head through the threaded holes 15 on the top of the cladding nozzle base 1, the installation of the cladding nozzle can be completed quickly and conveniently.

[0037] The working principle or structural principle is as follows: Before using the cladding nozzle, it is fixed to the laser head by the threaded hole 15 on the top of the cladding nozzle base 1, thus completing the installation of the cladding nozzle. Then, the first quick-connect plug 6 on the powder feeding pipe 5 is connected to the powder feeding connection pipe, and the second quick-connect plugs 10 on the two cold water pipes 9 are connected to the inlet and outlet of the chiller through the pipes, thus forming a cooling circuit. When the cladding nozzle is processing, the powder enters the cavity formed by the inner nozzle 11 and the cladding nozzle base 1 through the four powder feeding pipes 5 and the four powder feeding holes 4. The powder is evenly dispersed in the cavity and finally slides down along the narrow gap formed by the two smooth conical surfaces of the inner nozzle 11 and the outer nozzle 12 and converges at a point. At the same time, cold water flows through a cooling... Water pipe 9, a guide hole 7, and a connecting hole 8 enter the annular groove 13 of the outer nozzle 12, which can promptly remove the heat from the outer nozzle 12, reducing the working temperature of the inner nozzle 11 and the outer nozzle 12. This reduces the temperature of the powder as it passes through the annular channel formed by the inner nozzle 11 and the outer nozzle 12, preventing the powder from sticking to the nozzle outlet due to excessive temperature, thus avoiding powder blockage or nozzle burnout. It also reduces the wear of the annular channel formed by the inner nozzle 11 and the outer nozzle 12 due to high temperature, which would worsen the powder's cohesion and affect the quality of the cladding product, thus reducing the powder utilization rate. The heat-absorbing cold water flows back to the chiller through another connecting hole 8, another guide hole 7, and another cold water pipe 9.

[0038] Those skilled in the art will understand that the features described in the various embodiments and / or claims of this utility model can be combined or combined in various ways, even if such combinations or combinations are not explicitly described in this utility model. In particular, the features described in the various embodiments and / or claims of this utility model can be combined or combined in various ways without departing from the spirit and teachings of this utility model. All such combinations and / or combinations fall within the scope of this utility model.

Claims

1. A water-cooled high-speed coaxial ring-shaped powder feeding cladding nozzle comprising a cladding nozzle base body (1), characterized in that: The bottom inner side of the cladding nozzle base (1) is provided with a positioning groove, and the bottom of the positioning groove is provided with an internal threaded hole (2). Two sealing ring placement grooves (3) are provided on the positioning groove outside the internal threaded hole (2). Four powder feeding holes (4) are provided on the outer side of the cladding nozzle base (1). Four powder feeding pipes (5) are welded to the upper outer side of the cladding nozzle base (1). Two guide holes (7) are provided on the lower outer side of the cladding nozzle base (1). The bottom sides of the positioning groove are provided with three connecting holes (8) between the two sealing ring placement grooves (3). The three connecting holes (8) are connected to the guide hole (7). Two cold water pipes (9) are welded to the outside of the cladding nozzle base (1). The inside of the internal threaded hole (2) is connected to the inner nozzle (11) by thread. An outer nozzle (12) is installed on the cladding nozzle base (1) outside the inner nozzle (11). An annular groove (13) is provided on the top of the outer nozzle (12).

2. The water-cooled high-speed coaxial annular powder feeding and cladding nozzle according to claim 1, characterized in that: The four powder feeding tubes (5) are respectively connected to the four powder feeding holes (4), and each of the four powder feeding tubes (5) is equipped with a first adapter quick plug (6).

3. The water-cooled high-speed coaxial ring-shaped powder feeding and cladding nozzle according to claim 1, characterized in that: The cold water pipe (9) is connected to the guide hole (7), and a second quick-connect plug (10) is installed on both cold water pipes (9).

4. The water-cooled high-speed coaxial ring-shaped powder feeding and cladding nozzle according to claim 1, characterized in that: An outer mouth locking ring (14) is sleeved on the outside of the outer mouth (12), and the outer mouth locking ring (14) is threaded to the bottom of the outer side of the cladding mouth base (1).

5. The water-cooled high-speed coaxial ring-shaped powder feeding and cladding nozzle according to claim 1, characterized in that: The top of the outer nozzle (12) abuts against the inside of the positioning groove, and the connecting hole (8) is connected to the annular groove (13).

6. The water-cooled high-speed coaxial ring-shaped powder feeding and cladding nozzle according to claim 1, characterized in that: The top of the cladding nozzle substrate (1) is provided with several threaded holes (15), which are used for mounting the laser head.

7. The water-cooled high-speed coaxial ring-shaped powder feeding and cladding nozzle according to claim 1, characterized in that: The outer mouth (12) is fitted onto the outside of the inner mouth (11).

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