Coaxial powder feeding nozzle structure with adjustable powder spot focal length

Abstract

The utility model relates to a powder spot focal length adjustable coaxial powder feeding nozzle structure, and belongs to the technical field of laser cladding. The powder feeding device comprises a laser channel, an adjusting module, an adjusting sliding groove and a plurality of powder feeding nozzles, the adjusting sliding groove is connected with the laser channel, the powder feeding nozzles are evenly distributed on the adjusting module, and the adjusting module is movably arranged on the adjusting sliding groove. The structure of the adjusting sliding groove and the adjusting module is adopted for adjusting the focal length of the powder spot, the gathering position of the powder feeding nozzle can be changed by moving the position of the adjusting module on the adjusting sliding groove, and therefore the focal length of the powder spot can be matched with laser beam spots with different focal lengths on the premise that the nozzle is not replaced, and the powder spot focal length is adjusted. Good coupling of powder spots and light spots is achieved, and the quality and stability of the laser cladding process are ensured.

Description

Technical Field

[0001] The utility model relates to a coaxial powder feeding nozzle structure, in particular to a coaxial powder feeding nozzle structure with adjustable powder spot focal length, which belongs to the technical field of laser cladding. Background Art

[0002] Laser cladding uses high-density laser heating to spray cladding powder or wire material into a molten pool through a nozzle, where it melts with the substrate surface to form a tight metallurgical bonding layer. It is then deposited layer by layer in areas where surface modification or repair is required, thereby achieving the purpose of improving surface properties or repairing the surface. It has been widely used in aerospace, automotive industry, machinery manufacturing and other fields, and has broad application prospects.

[0003] To adapt to different application scenarios, the laser cladding process requires adjusting the laser beam spot size of the laser cladding head. This requires adjusting the defocus distance of the laser cladding head or replacing a different laser cladding head. However, all commercial coaxial powder feed nozzles on the market are fixed and non-adjustable. This means that different powder feed nozzle structures must be replaced to cope with different defocus distances.

[0004] In actual use, each time the powder feeding nozzle is replaced, the process needs to be re-adjusted and tested, and different types of powder feeding nozzles are required to correspond to different laser beam spot parameters. These will greatly increase manpower, material and time costs, and affect process stability.

[0005] In view of the above problems, it is particularly necessary to provide a four-channel coaxial powder feeding nozzle with adjustable powder spot focal length, which can well solve the problem that the coaxial powder feeding nozzles on the market cannot adjust the powder spot focal length. Utility Model Content

[0006] The purpose of the utility model is to overcome the above-mentioned deficiencies in the prior art and to provide a coaxial powder feeding nozzle structure with adjustable powder spot focal length, which has a simple and reasonable structural design, is safe and reliable, has good adaptability and is easy to adjust.

[0007] The technical solution adopted by the present invention to solve the above problems is: the coaxial powder feeding nozzle structure with adjustable powder spot focal length includes a laser channel, and is characterized in that it also includes an adjustment module, an adjustment chute and multiple powder feeding nozzles, the adjustment chute is connected to the laser channel, and the multiple powder feeding nozzles are evenly distributed on the adjustment module, and the adjustment module is movably arranged on the adjustment chute.

[0008] Preferably, the present invention further comprises a bolt and a nut, and there are four powder feeding nozzles, and the four powder feeding nozzles are all fixed to the adjustment module by means of the bolt and the nut.

[0009] Preferably, the present invention further comprises connecting bolts and connecting nuts, and the adjustment module covers the laser channel via the connecting bolts and connecting nuts.

[0010] Preferably, the present invention further comprises an adjusting bolt and an adjusting nut, and the adjusting module moves on the adjusting slot via the adjusting bolt and the adjusting nut.

[0011] Preferably, the present invention further comprises a second bolt, and the adjustment slide is connected to the laser channel via the second bolt.

[0012] Preferably, the present invention further comprises a water outlet and a water inlet for cooling the powder feeding nozzle, and the water inlet is located below the water outlet.

[0013] Compared with the prior art, the utility model has the following advantages and effects: the overall structural design is reasonable, safe and reliable, and a four-channel powder feeding channel design with adjustable focal length is adopted. The powder feeding channel is at a fixed angle and is connected and fixed by adjusting bolts, adjusting nuts and adjusting chutes. The four powder feeding channels convey and converge the cladding material to the focal plane of the powder spot through inert gas, forming a powder convergence, that is, a powder spot. Among them, the position of the powder convergence can be adjusted by adjusting the position of the powder feeding channel on the adjusting chute, thereby realizing the adjustment of the focal length of the powder spot. At the same time, the size of the powder spot can be controlled by adjusting the carrier gas flow rate and the powder feeding amount. Finally, the adaptation of light spots of different sizes at different focal lengths of the laser cladding head can be realized without replacing the powder feeding nozzle, which is beneficial to reducing the time, manpower and material costs of process adjustment during the laser cladding process and can improve the process stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0015] Figure 2 It is a schematic diagram of the powder spot focus adjustment mechanism of an embodiment of the present utility model.

[0016] Figure 3 It is a schematic structural cross-sectional view of an embodiment of the present utility model.

[0017] In the figure: laser channel 1, powder feeding nozzle 2, adjustment module 3, adjustment chute 4, bolt 1 5, nut 6, adjustment bolt 7, adjustment nut 8, connecting bolt 9, connecting nut 10, bolt 2 11, water outlet 12, water inlet 13. DETAILED DESCRIPTION

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and through examples. The following examples are provided to explain the present invention, but the present invention is not limited to the following examples.

[0019] Example

[0020] See also Figures 1 to 3 The coaxial powder feeding nozzle structure with adjustable powder spot focal length in this embodiment mainly includes a laser channel 1, a powder feeding nozzle 2, an adjustment module 3, an adjustment chute 4, a water outlet 12 and a water inlet 13.

[0021] The adjustment chute 4 in this embodiment is connected and fixed to the laser channel 1 through bolt 2 11, and the four powder feeding nozzles 2 are fixed to the adjustment module 3 through bolt 1 5 and nut 6. The adjustment module 3 is composed of two parts that cover the laser channel 1 through connecting bolts 9 and connecting nuts 10, and the adjustment module 3 is set on the adjustment chute 4 through adjusting bolts 7 and adjusting nuts 8.

[0022] The adjusting module 3 in this embodiment can be moved on the adjusting chute 4 by loosening the adjusting nut 8, and then fixed by tightening the adjusting nut 8 after moving to the specified position. That is, the position of powder convergence is adjusted by adjusting the position of the adjusting module 3 on the adjusting chute 4, thereby achieving the purpose of adjusting the focal length of the powder spot of the powder feeding nozzle.

[0023] When laser light exits laser channel 1, the outlet of laser channel 1 absorbs a large amount of laser energy, causing the temperature to rise. To reduce the temperature at the outlet of laser channel 1 and prevent deformation due to overheating, a water inlet 13 and a water outlet 12 are provided near the outlet. Water inlet 13 is located below water outlet 12. Cooling water enters through water inlet 13, absorbs heat from the outlet of laser channel 1, and then flows out through water outlet 12 above.

[0024] Through the above description, those skilled in the art can already implement it.

[0025] In addition, it should be noted that the shapes and names of the parts and components of the specific embodiments described in this specification may be different, and the above content described in this specification is merely an example of the structure of the utility model. Any equivalent changes or simple changes made based on the structure, features and principles described in the concept of the utility model patent are included in the scope of protection of the utility model patent. Technicians in the technical field of the utility model can make various modifications or supplements to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims, they should fall within the scope of protection of the utility model.

Claims

1. A coaxial powder feeding nozzle structure with adjustable powder spot focal length, comprising a laser channel (1), characterized in that: It also includes an adjustment module (3), an adjustment chute (4) and a plurality of powder delivery nozzles (2), wherein the adjustment chute (4) is connected to the laser channel (1), the plurality of powder delivery nozzles (2) are evenly distributed on the adjustment module (3), and the adjustment module (3) is movably arranged on the adjustment chute (4).

2. The coaxial powder feeding nozzle structure with adjustable powder spot focal length according to claim 1 is characterized in that: It also includes a bolt (5) and a nut (6), and there are four powder delivery nozzles (2). The four powder delivery nozzles (2) are all fixed to the adjustment module (3) by means of the bolt (5) and the nut (6).

3. The coaxial powder feeding nozzle structure with adjustable powder spot focal length according to claim 1 is characterized in that: It also comprises a connecting bolt (9) and a connecting nut (10), and the adjusting module (3) covers the laser channel (1) via the connecting bolt (9) and the connecting nut (10).

4. The coaxial powder feeding nozzle structure with adjustable powder spot focal length according to claim 1 is characterized in that: It also comprises an adjusting bolt (7) and an adjusting nut (8), and the adjusting module (3) is moved on the adjusting slide groove (4) via the adjusting bolt (7) and the adjusting nut (8).

5. The coaxial powder feeding nozzle structure with adjustable powder spot focal length according to claim 1 is characterized in that: It also includes a second bolt (11), and the adjusting slide groove (4) is connected to the laser channel (1) via the second bolt (11).

6. The coaxial powder feeding nozzle structure with adjustable powder spot focal length according to claim 1 is characterized in that: It also includes a water outlet (12) and a water inlet (13) for cooling the powder feeding nozzle (2), wherein the water inlet (13) is located below the water outlet (12).

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