Powder feeding structure for laser cladding processing

Abstract

The utility model relates to the field of laser cladding processing, and discloses a laser cladding processing powder feeding structure which comprises a cladding head, the top end of the cladding head is fixedly connected with a conveying pipe, the periphery of the conveying pipe is provided with a threaded groove, the periphery of the threaded groove is in threaded connection with an extrusion assembly, the periphery of the cladding head is fixedly connected with an inclined surface convex block, and the inclined surface convex block is fixedly connected with the conveying pipe. A limiting groove is formed in the inclined face protruding block, the inner side of the limiting groove is elastically connected with a limiting block through a limiting spring, the inner side of the limiting block is fixedly connected with a control cylinder, and powder feeding grooves are formed in the cladding head and the conveying pipe. According to the powder feeding device, the inclined plane pressing ring, the limiting block and the rotating threaded block are arranged, so that the inclined plane pressing ring moves up and down, the control cylinder in the powder feeding groove moves horizontally under the action of the limiting spring, the size of a channel of the powder feeding groove is conveniently controlled, and therefore the powder feeding amount is controlled, and protective coatings with different thicknesses can be formed on the surface of a workpiece according to needs; and the use effect is improved.

Description

Technical Field

[0001] The utility model relates to the field of laser cladding processing, in particular to a powder feeding structure for laser cladding processing. Background Art

[0002] Laser cladding is a surface modification technology that adds cladding material to the surface of the substrate and uses a high-energy-density laser beam to melt it together with a thin layer on the surface of the substrate to form a metallurgically bonded filler cladding layer. This technology combines the high energy density and high power of the laser beam to quickly melt and cool the surface of the material, thereby generating a hard, wear-resistant, corrosion-resistant coating with excellent properties.

[0003] In conventional laser cladding processing, a powder feeding channel is usually provided inside the cladding head to eject the cladding material together with the laser, thereby melting the cladding material together with the substrate surface. For this purpose, a laser cladding processing powder feeding structure is required.

[0004] The current powder feeding structure of laser cladding processing usually sets a powder feeding channel in the cladding head, and feeds powder to the center laser through the powder feeding channel. The diameter of the powder feeding channel is usually fixed, and the powder feeding amount cannot be conveniently controlled by controlling the size of the powder feeding channel, and different thicknesses of coatings cannot be applied on the workpiece surface as needed. On the other hand, the current powder feeding structure of laser cladding processing usually uses a hose for powder feeding, and there is no limiting mechanism on the cladding head. During operation, the hose may be pulled, thereby causing damage to the hose. Therefore, a laser cladding processing powder feeding structure is proposed to solve the above problems. Summary of the invention

[0005] In order to make up for the above shortcomings, the utility model provides a powder feeding structure for laser cladding processing, aiming to improve the problems of controlling the powder feeding amount and the hose being easily pulled in the prior art.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a laser cladding processing powder feeding structure, including a cladding head, the top of the cladding head is fixedly connected to a delivery pipe, the outer periphery of the delivery pipe is provided with a threaded groove, the outer periphery of the threaded groove is threadedly connected with an extrusion assembly, the outer periphery of the cladding head is fixedly connected to an inclined surface protrusion, a limiting groove is provided inside the inclined surface protrusion, the inner side of the limiting groove is elastically connected to the limiting block through a limiting spring, the inner side of the limiting block is fixedly connected to a control cylinder, the inside of the cladding head and the inside of the delivery pipe are provided with a powder feeding groove, and the inside of the cladding head and the inside of the delivery pipe are provided with a laser groove.

[0007] As a further description of the above technical solution:

[0008] A powder feeding plug is arranged on the top of the powder feeding trough, a powder feeding hose is fixedly connected inside the powder feeding plug, an annular groove is opened on the outer periphery of the conveying pipe, a buckle is fixedly connected to the inner wall of the side of the annular groove, and a rubber pad is fixedly connected to the opening of the buckle.

[0009] As a further description of the above technical solution:

[0010] The extrusion assembly comprises a threaded block, the internal thread of the threaded block is connected to the outer periphery of the threaded groove, a through groove is formed at the bottom end of the threaded block, and a bevel pressure ring is fixedly connected to the bottom end of the threaded block.

[0011] As a further description of the above technical solution:

[0012] One end of the limit spring is fixedly connected to the inner side of the limit groove, and the other end of the limit spring is fixedly connected to the inner side of the limit block. The outer periphery of the limit block is slidably connected to the inside of the limit groove.

[0013] As a further description of the above technical solution:

[0014] The inner diameter of the through groove is slightly larger than the maximum diameter of the inclined surface protrusion.

[0015] As a further description of the above technical solution:

[0016] The inclined surface is arranged inside the inclined surface pressing ring, the inner inclined surface of the inclined surface pressing ring is matched with the outer inclined surface of the inclined surface protrusion, and the inner side of the inclined surface pressing ring contacts with the outer inclined surface of the limiting block.

[0017] As a further description of the above technical solution:

[0018] The outer periphery of the control cylinder is slidably connected to the inside of the cladding head, the inner side of the control cylinder is arranged as an arc surface, and the inner side of the control cylinder contacts the inner side of the powder feeding groove.

[0019] As a further description of the above technical solution:

[0020] The buckle is made of plastic with certain elasticity, and the powder feeding hose is clamped inside the buckle.

[0021] The utility model has the following beneficial effects:

[0022] 1. In the utility model, by setting the inclined pressure ring and the limit block, the threaded block is rotated to move the inclined pressure ring up and down. Under the action of the limit spring, the control cylinder in the powder feeding groove is moved horizontally, so that the channel size of the powder feeding groove is conveniently controlled, thereby controlling the powder feeding amount, so that the surface of the workpiece can form a protective coating of different thicknesses as needed, thereby improving the use effect.

[0023] 2. In the utility model, by providing buckles and rubber pads, the buckles are used to cooperate with the powder delivery hoses, so that a large number of powder delivery hoses on the device can be fixed, thereby avoiding being pulled during use and preventing damage to the air pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is an overall front view schematic diagram of a powder feeding structure for laser cladding processing proposed by the utility model;

[0025] Figure 2 A front cross-sectional schematic diagram of a cladding head of a powder feeding structure for laser cladding processing proposed by the utility model;

[0026] Figure 3 It is a partial schematic diagram of the front section of a cladding head of a powder feeding structure for laser cladding processing proposed by the utility model;

[0027] Figure 4 It is a partial schematic diagram of the front section of a conveying pipe of a powder feeding structure for laser cladding processing proposed by the utility model.

[0028] Legend:

[0029] 1. Cladding head; 2. Delivery pipe; 3. Thread groove; 4. Thread block; 5. Through groove; 6. Inclined pressure ring; 7. Inclined convex block; 8. Limiting groove; 9. Limiting spring; 10. Limiting block; 11. Control cylinder; 12. Powder feeding groove; 13. Laser groove; 14. Powder feeding plug; 15. Powder feeding hose; 16. Annular groove; 17. Buckle; 18. Rubber pad. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] Reference Figure 1-Figure 3The utility model provides an embodiment: a laser cladding processing powder feeding structure, including a cladding head 1 for cladding operation, a conveying pipe 2 for conveying molten material and transmitting laser is fixedly connected to the top of the cladding head 1, a thread groove 3 is provided on the outer periphery of the conveying pipe 2, an extrusion assembly is threadedly connected to the outer periphery of the thread groove 3, the extrusion assembly includes a thread block 4, the inner thread of the thread block 4 is connected to the outer periphery of the thread groove 3, the thread block 4 rotates and can move up and down on the outer periphery of the thread groove 3, a through groove 5 is provided at the bottom end of the thread block 4, a bevel pressure ring 6 is fixedly connected to the bottom end of the thread block 4, a plurality of groups of vertical grooves are arranged on the outer periphery of the bevel pressure ring 6, and the bevel pressure ring 6 can be rotated conveniently, and a bevel protrusion 7 is fixedly connected to the outer periphery of the cladding head 1 The inner diameter of the groove 5 is slightly larger than the maximum diameter of the inclined surface protrusion 7, so that the threaded block 4 can move downward without being blocked by the inclined surface protrusion 7. A limiting groove 8 is provided inside the inclined surface protrusion 7. There are eight groups of limiting grooves 8, which are evenly distributed in an annular shape inside the inclined surface protrusion 7. The inner side of the limiting groove 8 is elastically connected to the limiting block 10 through a limiting spring 9. When the limiting block 10 is not subjected to force, the limiting spring 9 will push the limiting block 10 to move outward. One end of the limiting spring 9 is fixedly connected to the inner side of the limiting groove 8, and the other end of the limiting spring 9 is fixedly connected to the inner side of the limiting block 10. The outer periphery of the limiting block 10 is slidably connected to the inside of the limiting groove 8, and the limiting groove 8 limits the limiting block 10 to move horizontally only along the inner wall of the limiting groove 8.

[0032] Reference Figure 1-Figure 3 , an inclined surface is arranged inside the inclined pressure ring 6, the inner inclined surface of the inclined pressure ring 6 is adapted to the shape of the outer inclined surface of the inclined projection 7, the inner side of the inclined pressure ring 6 is in contact with the outer inclined surface of the limit block 10, the inclined pressure ring 6 moves downward, and a gap is generated between the inclined pressure ring 6 and the inclined projection 7. At this time, the limit block 10 will move outward under the action of the limit spring 9 and contact the inclined pressure ring 6. A control cylinder 11 is fixedly connected to the inner side of the limit block 10, and the outer periphery of the control cylinder 11 is slidably connected to the inside of the cladding head 1, and the inner side of the control cylinder 11 is set to an arc A powder feeding groove 12 for conveniently conveying the cladding material is provided inside the cladding head 1 and the conveying tube 2. The inner side of the control cylinder 11 is in contact with the inner side of the powder feeding groove 12. The control cylinder 11 moves horizontally in the powder feeding groove 12, thereby controlling the channel size of the powder feeding groove 12. A laser groove 13 for conveniently transmitting the laser is provided inside the cladding head 1 and the conveying tube 2. There are eight groups of powder feeding grooves 12, which are evenly distributed around the laser groove 13 in a cone shape. The eight groups of powder feeding grooves 12 extend downward and intersect at one point, which is located on the central axis of the laser groove 13.

[0033] Reference Figure 1-Figure 3A group of powder feeding plugs 14 are arranged on the top of each group of powder feeding grooves 12, and a powder feeding hose 15 for conveying cladding material is fixedly connected inside the powder feeding plug 14. An annular groove 16 is opened on the outer periphery of the conveying pipe 2, and a buckle 17 is fixedly connected to the inner wall of the side of the annular groove 16. There are eight groups of buckles 17, which are evenly distributed on the outer periphery of the annular groove 16 in an annular shape. The position of each group of buckles 17 corresponds to the position of a group of powder feeding hoses 15. The buckle 17 is made of plastic with certain elasticity, and a circular through hole is arranged inside, and the diameter is slightly smaller than the diameter of the powder feeding hose 15. An opening is arranged on the outside. When the buckle 17 is bent to both sides, the buckle 17 will open, and the powder feeding hose 15 is clamped in the inside of the buckle 17, and the buckle 17 will not cause the powder feeding hose 15 to be stuck and blocked. A rubber pad 18 is fixedly connected to the opening of the buckle 17. When in use, the rubber pad 18 can be bent to facilitate the opening of the buckle 17.

[0034] Working principle: When you want to control the size of the powder feeding groove 12, rotate the bevel pressure ring 6, the bevel pressure ring 6 drives the threaded block 4 to rotate, the threaded block 4 moves downward on the periphery of the conveying pipe 2, drives the bevel pressure ring 6 to move downward, the bevel pressure ring 6 and the bevel protrusion 7 are out of contact, and a gap is generated. At this time, under the elastic force of the limit spring 9, the limit block 10 moves outward, and the limit block 10 drives the control cylinder 11 to move outward, so that the channel of the powder feeding groove 12 is expanded, and the powder feeding amount of the powder feeding groove 12 is increased, so that the coating thickness on the surface of the workpiece can be conveniently controlled. When you want to fix the powder feeding hose 15, bend the rubber pad 18 to open the opening of the buckle 17, and then insert the powder feeding hose 15 into the inside of the buckle 17, so as to conveniently fix the powder feeding hose 15 and prevent the powder feeding hose 15 from being pulled.

[0035] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A powder feeding structure for laser cladding processing, comprising a cladding head (1), characterized in that: The top end of the cladding head (1) is fixedly connected to a conveying pipe (2), the outer circumference of the conveying pipe (2) is provided with a threaded groove (3), the outer circumference of the threaded groove (3) is threadedly connected to an extrusion assembly, the outer circumference of the cladding head (1) is fixedly connected to an inclined surface protrusion (7), a limiting groove (8) is provided inside the inclined surface protrusion (7), the inner side of the limiting groove (8) is elastically connected to the limiting block (10) via a limiting spring (9), the inner side of the limiting block (10) is fixedly connected to a control cylinder (11), the inside of the cladding head (1) and the conveying pipe (2) are provided with a powder feeding groove (12), and the inside of the cladding head (1) and the conveying pipe (2) are provided with a laser groove (13).

2. A powder feeding structure for laser cladding processing according to claim 1, characterized in that: A powder delivery plug (14) is arranged at the top of the powder delivery groove (12), a powder delivery hose (15) is fixedly connected inside the powder delivery plug (14), an annular groove (16) is opened on the outer periphery of the conveying pipe (2), a buckle (17) is fixedly connected to the inner wall of the side of the annular groove (16), and a rubber pad (18) is fixedly connected to the opening of the buckle (17).

3. The powder feeding structure for laser cladding processing according to claim 1, characterized in that: The extrusion assembly comprises a threaded block (4), the internal thread of the threaded block (4) being connected to the outer periphery of the threaded groove (3), a through groove (5) being formed at the bottom end of the threaded block (4), and a bevel pressure ring (6) being fixedly connected to the bottom end of the threaded block (4).

4. The powder feeding structure for laser cladding processing according to claim 1, characterized in that: One end of the limit spring (9) is fixedly connected to the inner side of the limit groove (8), and the other end of the limit spring (9) is fixedly connected to the inner side of the limit block (10); the outer periphery of the limit block (10) is slidably connected to the inside of the limit groove (8).

5. The laser cladding powder feeding structure according to claim 3, characterized in that: The inner diameter of the through groove (5) is slightly larger than the maximum diameter of the inclined surface protrusion (7).

6. The powder feeding structure for laser cladding processing according to claim 3, characterized in that: The inclined surface pressure ring (6) is provided with an inclined surface inside, the inner inclined surface of the inclined surface pressure ring (6) is matched with the outer inclined surface of the inclined surface protrusion (7) in shape, and the inner side of the inclined surface pressure ring (6) is in contact with the outer inclined surface of the limit block (10).

7. The powder feeding structure for laser cladding processing according to claim 1, characterized in that: The outer periphery of the control cylinder (11) is slidably connected to the inside of the cladding head (1), the inner side of the control cylinder (11) is arranged as an arc surface, and the inner side of the control cylinder (11) is in contact with the inner side of the powder feeding groove (12).

8. The powder feeding structure for laser cladding processing according to claim 2, characterized in that: The buckle (17) is made of plastic with a certain elasticity, and the powder delivery hose (15) is clamped inside the buckle (17).

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