Powder feeding device for cladding

Abstract

The utility model belongs to the technical field of cladding processing, and particularly relates to a powder feeding device for cladding, which comprises a powder storage part and a powder feeding part communicated with the powder storage part, the powder storage part is used for conveying metal powder to the powder feeding part, and the powder feeding part is used for conveying metal powder to an external cladding head; wherein the powder storage part is provided with a powder outlet, the powder feeding part is provided with a temporary storage cavity, and the powder outlet is communicated with the temporary storage cavity; the powder feeding part further comprises a powder feeding wheel rotationally arranged in the temporary storage cavity, an annular groove is formed in the powder feeding wheel, and the annular groove right faces the powder outlet. The powder storage part conveys metal powder into the temporary storage cavity through the powder outlet, the metal powder can fall into the annular groove under the action of gravity, and along with rotation of the powder feeding wheel, the flowing direction and the flowing rate of the metal powder can be conveniently controlled, so that the segregation phenomenon of the metal powder is reduced, and the uniformity of the metal powder in the conveying process is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of cladding processing technology, and in particular to a powder feeding device for cladding. Background Technology

[0002] Laser cladding is a surface treatment process that involves adding metal powder to the surface of a substrate and using a laser beam to melt the metal powder with the substrate surface material. The metal powder is often a mixture of different metals. Currently, powder feeding devices are used to transport the metal powder during the cladding process. However, current powder feeding devices mostly rely on the gravity of the metal powder itself. During this process, the metal powder is prone to agglomeration during its descent, meaning that more powder accumulates in some areas and less in others, resulting in uneven powder feeding and affecting the cladding effect.

[0003] Therefore, the above problems urgently need to be solved. Utility Model Content

[0004] The purpose of this invention is to provide a powder feeding device for cladding to improve the uniformity of powder feeding.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A powder feeding device for cladding is used to convey metal powder. The powder feeding device includes a powder storage section and a powder feeding section communicating with the powder storage section. The powder storage section is used to convey metal powder to the powder feeding section, and the powder feeding section is used to uniformly convey metal powder to an external cladding head.

[0007] The powder storage section has a powder outlet, the powder delivery section has a buffer cavity, and the powder outlet is connected to the buffer cavity;

[0008] The powder feeding section also includes a powder feeding wheel that is rotatably disposed in the buffer cavity. The powder feeding wheel has an annular groove in its circumference, and the annular groove is directly opposite the powder outlet.

[0009] Preferably, the powder feeding section further includes a powder feeding pipe, one end of which can communicate with the powder outlet, and the other end can extend into the interior of the annular groove, with a gap between it and the bottom of the annular groove.

[0010] Preferably, the powder feeding part further includes a dialing member disposed inside the buffer cavity, and the dialing member has a dialing end that abuts against the annular groove.

[0011] Preferably, the annular groove is a V-shaped groove.

[0012] Preferably, the powder feeding part includes a housing and a powder feeding nozzle, the powder feeding nozzle is disposed in the housing, and the powder feeding nozzle and the housing can form the buffer cavity;

[0013] The powder feeding nozzle is disposed opposite to the annular groove, and the powder feeding nozzle has a first guide surface in the shape of a cone, and the end of the first guide surface is provided with a powder feeding port communicating with the cladding head.

[0014] Preferably, the powder feeding device for cladding further includes a positive pressure section for conveying inert gas into the buffer cavity.

[0015] Preferably, the powder storage section includes a cylinder and an end cap, the cylinder and the end cap are connected, and the cylinder and the end cap can form a storage cavity for storing the metal powder.

[0016] The end cap has a tapered second guide surface, and the powder outlet is located at the end of the second guide surface.

[0017] Preferably, the powder feeding device for cladding further includes a connecting seat, the connecting seat having a connecting channel, one end of the connecting channel being connected to the powder outlet and the other end being connected to the buffer chamber;

[0018] Positioning parts are provided between the connecting seat and the end cap, and between the connecting seat and the powder feeding part.

[0019] Preferably, the powder feeding device for cladding further includes a stirring section, which is disposed inside the powder storage section and is used to stir the metal powder.

[0020] Preferably, the stirring part includes a stirring shaft and a plurality of stirring elements disposed on the stirring shaft. The stirring shaft is rotatable about its own axis, and the end of the stirring shaft is directly opposite the powder outlet.

[0021] The beneficial effects of this utility model are:

[0022] The powder feeding device for cladding of this utility model has a powder storage section that feeds metal powder into the buffer cavity through a powder outlet. Under the action of gravity, the metal powder can fall into the annular groove. As the powder feeding wheel rotates, it is easy to control the flow direction and flow rate of the metal powder, thereby reducing the agglomeration of the metal powder and ensuring the uniformity of the metal powder during the conveying process. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the powder feeding device for cladding in an embodiment of this utility model;

[0024] Figure 2 for Figure 1 One of the sectional views in the diagram;

[0025] Figure 3 for Figure 1 The second sectional view in the text.

[0026] In the picture:

[0027] 1. Powder storage section; 11. Cylinder body; 12. End cap; 121. Powder outlet; 122. Second guide surface; 13. Buffer chamber;

[0028] 2. Powder feeding section; 21. Buffer cavity; 22. Powder feeding wheel; 221. Annular groove; 23. Powder feeding pipe; 24. Pulse; 25. Housing; 26. Powder feeding nozzle; 261. Powder feeding port; 262. First guide surface;

[0029] 3. Connecting seat; 4. Positioning part;

[0030] 5. Stirring section; 51. Stirring shaft; 52. Stirring components;

[0031] 6. Air connector. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0033] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0036] Please see Figures 1 to 3 This embodiment proposes a powder feeding device for cladding, used to transport metal powder. It includes a powder storage section 1 and a powder feeding section 2 connected to the powder storage section 1. The powder storage section 1 is used to feed metal powder to the powder feeding section 2, and the powder feeding section 2 is used to uniformly feed metal powder to an external cladding head. The powder storage section 1 has a powder outlet 121, and the powder feeding section 2 has a buffer cavity 21. The powder outlet 121 is connected to the buffer cavity 21. The powder feeding section 2 also includes a powder feeding wheel 22 rotatably disposed in the buffer cavity 21. The powder feeding wheel 22 has an annular groove 221 circumferentially disposed, and the annular groove 221 is directly opposite to the powder outlet 121.

[0037] It is understandable that the powder storage unit 1 conveys metal powder into the buffer chamber 21 through the powder outlet 121. Under the action of gravity, the metal powder can fall into the annular groove 221. As the powder feeding wheel 22 rotates, it is easy to control the flow direction and flow rate of the metal powder, thereby reducing the agglomeration of the metal powder and ensuring the uniformity of the metal powder during the conveying process.

[0038] Preferably, the annular groove 221 is a V-shaped groove. During the falling process, the two sidewalls of the V-shaped groove can guide and limit the metal powder, thereby ensuring that the metal powder falls to the bottom of the annular groove 221, and thus ensuring the uniformity of the metal powder during the conveying process.

[0039] It should be noted that the powder feeding wheel 22 is equipped with an electric motor. The powder feeding wheel 22 is located at the rotating end of the electric motor. Under the action of the electric motor, the rotation speed of the powder feeding wheel 22 can be controlled, thereby controlling the conveying speed of the metal powder and improving the applicability of the powder feeding device for cladding.

[0040] Furthermore, the powder feeding section 2 also includes a powder feeding pipe 23. One end of the powder feeding pipe 23 can communicate with the powder outlet 121, and the other end can extend into the interior of the annular groove 221, with a gap provided between it and the bottom of the annular groove 221. It can be understood that, with the cooperation of the powder feeding pipe 23 and the annular groove 221, the metal powder can be further guided and limited, thereby ensuring the uniformity of the metal powder during the conveying process.

[0041] Specifically, the shape of the end of the powder feeding pipe 23 extending into the annular groove 221 is a V-shape that matches the V-shaped groove. This arrangement ensures that the spacing between the powder feeding pipe 23 and the annular groove 221 is consistent at all positions, thereby further ensuring the guidance and positioning of the metal powder.

[0042] During the conveying process, a small amount of metal powder will adhere to the annular groove 221. Over time, the metal powder accumulated in the annular groove 221 will increase, which may affect the conveying effect of the metal powder. Therefore, in this embodiment, the powder feeding part 2 also includes a pusher 24, which is used to remove the metal powder adhering to the annular groove 221 to ensure the conveying effect of the metal powder.

[0043] Specifically, the actuating element 24 is disposed inside the buffer cavity 21, and the actuating element 24 has an actuating end that abuts against the bottom of the annular groove 221. It can be understood that the actuating end can abut against the annular groove 221, thereby scraping the metal powder adhering to the annular groove 221 during the rotation of the powder feeding wheel 22, thereby completing the removal of the metal powder.

[0044] Preferably, the actuating end is adapted to fit the annular groove 221 or the actuating end is a brush.

[0045] For example, the dial 24 is rod-shaped and passes through the cavity wall of the buffer cavity 21 and is slidably connected to the cavity wall so as to adjust the position of the dial 24 so that the dial 24 can be adapted to powder feeding rollers 22 of different sizes.

[0046] In addition, after the position of the dial 24 is adjusted, the dial 24 is locked by bolts or other locking devices to prevent the position of the dial 24 from shifting during the rotation of the powder feeding wheel 22.

[0047] In this embodiment, the powder feeding unit 2 includes a housing 25 and a powder feeding nozzle 26. The powder feeding nozzle 26 is disposed on the housing 25, and the powder feeding nozzle 26 and the housing 25 can form a buffer cavity 21. The powder feeding nozzle 26 is disposed opposite to the annular groove 221, and the powder feeding nozzle 26 has a tapered first guide surface 262. The end of the first guide surface 262 is provided with a powder feeding port 261 communicating with the cladding head. It can be understood that after passing through the powder feeding wheel 22, the metal powder can be conveyed to the nozzle, and under the action of the first guide surface 262, it can converge towards the powder feeding port 261, thereby avoiding dead corners in the buffer cavity 21, and thus further ensuring the conveying effect of the metal powder.

[0048] For example, the housing 25 is provided with an opening that is directly opposite the powder outlet 121, and the powder feeding nozzle 26 is sealed at the opening. This arrangement can prevent leakage of metal powder during the conveying process, thereby improving safety performance.

[0049] In practical applications, when metal powder is transported by its own gravity, the entire powder feeding mechanism needs to be positioned above the cladding head. Therefore, in practical applications, there is often a requirement to arrange the powder feeding mechanism, which results in the low adaptability of the powder feeding device.

[0050] Based on the above, in this embodiment, the powder feeding device for cladding further includes a positive pressure section, which is used to supply inert gas into the buffer chamber 21. It is understood that during the metal powder feeding process, the positive pressure section can supply inert gas into the buffer chamber 21 to make the gas pressure inside the buffer chamber 21 greater than the external gas pressure, thereby driving the metal powder to move and completing the metal powder feeding. The positive pressure section eliminates the need to consider the placement of the powder feeding device for cladding, thus improving the applicability of the device.

[0051] For example, the positive pressure section includes an air source, an air pipe, and an air connector 6. The air connector 6 is disposed in the powder storage section 1 and can communicate with the buffer chamber 21. The air source can deliver inert gas into the buffer chamber 21 through the air pipe and the air connector 6.

[0052] It should be noted that, in order to ensure that the air pressure inside the buffer chamber 21 is greater than the external air pressure, the buffer chamber 21 needs to be sealed in practical applications. For example, a sealing gasket may be installed between the powder feeding nozzle 26 and the opening.

[0053] In this embodiment, the powder storage unit 1 includes a cylinder 11 and an end cap 12. The cylinder 11 and the end cap 12 are connected, and the cylinder 11 and the end cap 12 can form a storage cavity for storing metal powder. The end cap 12 has a conical second guide surface 122, and the powder outlet 121 is disposed at the end of the second guide surface 122. It is understood that the metal powder can fall under the action of gravity. During this process, under the action of the second guide surface 122, it can gather towards the powder outlet 121, thereby avoiding dead corners in the storage cavity and ensuring the conveying effect of the metal powder.

[0054] Furthermore, the powder feeding device for cladding also includes a connecting seat 3, which has a connecting channel. One end of the connecting channel is connected to the powder outlet 121, and the other end is connected to the buffer chamber 21. Positioning parts 4 are provided between the connecting seat 3 and the end cap 12, and between the connecting seat 3 and the powder feeding part 2. It can be understood that the assembly efficiency of the powder storage part 1 and the powder feeding part 2 can be improved by the action of the connecting seat 3 and the positioning parts 4.

[0055] The specific structures of the positioning part 4 between the connecting seat 3 and the end cap 12 and the positioning part 4 between the connecting seat 3 and the powder feeding part 2 can be the same or different. Here, the positioning part 4 between the connecting seat 3 and the end cap 12 is used as an example for explanation. The positioning part 4 includes a positioning hole and a positioning block. The positioning hole and the positioning block are adapted to be snapped together. The positioning hole is set in the connecting seat 3, the positioning block is set in the end cap 12, and the powder outlet 121 passes through the positioning block.

[0056] In particular, the positioning hole is a tapered hole, which facilitates the positioning of the end cap 12.

[0057] In this embodiment, the powder feeding device for cladding also includes a stirring section 5, which is disposed inside the powder storage section 1 and is used to stir the metal powder. It is understood that the stirring section 5 ensures the conveying rate of the metal powder, especially for metal powders with poor flowability.

[0058] Specifically, the stirring unit 5 includes a stirring shaft 51 and a plurality of stirring elements 52 disposed on the stirring shaft 51. The stirring shaft 51 is rotatable around its own axis, and the end of the stirring shaft 51 is directly opposite the powder outlet 121. It is understood that a motor is correspondingly provided on the stirring shaft 51, which can cause the stirring shaft 51 to rotate under the action of the motor, thereby causing the stirring elements 52 to rotate around the stirring shaft 51 to realize the flow of metal powder.

[0059] For example, the stirring element 52 is an inverted cone shape, that is, the bottom surface of the cone is directly opposite the powder outlet 121. This arrangement can not only stir the metal powder, but also guide the metal powder during the falling process.

[0060] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A powder feeding device for cladding for delivering metal powder, characterized by, The powder feeding device for cladding comprises a powder storage part (1) and a powder feeding part (2) in communication with the powder storage part (1), the powder storage part (1) is used for feeding metal powder to the powder feeding part (2), and the powder feeding part (2) is used for feeding metal powder to an external cladding head; The powder storage part (1) has a powder outlet (121), the powder feeding part (2) has a buffer cavity (21), and the powder outlet (121) is in communication with the buffer cavity (21); The powder feeding part (2) further comprises a powder feeding wheel (22) rotatably arranged in the buffer cavity (21), and an annular groove (221) is arranged on the powder feeding wheel (22) along the circumference of the powder feeding wheel (22), and the annular groove (221) is opposite to the powder outlet (121).

2. The powder feeding device for cladding according to claim 1, characterized by The powder feeding part (2) further comprises a powder feeding pipe (23), one end of the powder feeding pipe (23) can be in communication with the powder outlet (121), the other end of the powder feeding pipe (23) can extend to the inside of the annular groove (221), and a gap is arranged between the other end of the powder feeding pipe (23) and the groove bottom of the annular groove (221).

3. The powder feeding device for cladding according to claim 1, characterized by The powder feeding part (2) further comprises a pushing piece (24), the pushing piece (24) is arranged in the inside of the buffer cavity (21), and the pushing piece (24) has a pushing end abutting against the groove bottom of the annular groove (221).

4. The powder feeding device for cladding according to claim 1, characterized by The annular groove (221) is a V-shaped groove.

5. The powder feeding device for cladding according to claim 1, characterized by The powder feeding part (2) comprises a shell (25) and a powder feeding nozzle (26), the powder feeding nozzle (26) is arranged on the shell (25), and the powder feeding nozzle (26) and the shell (25) can form the buffer cavity (21) together; The powder feeding nozzle (26) is arranged opposite to the annular groove (221), and the powder feeding nozzle (26) has a first guide surface (262) in a conical shape, and the end of the first guide surface (262) is provided with a powder feeding port (261) in communication with the cladding head.

6. The powder feeding device for cladding according to claim 1, characterized by The powder feeding device for cladding further comprises a positive pressure part, and the positive pressure part is used for feeding inert gas into the buffer cavity (21).

7. The powder feeding device for cladding according to claim 1, characterized by The powder storage part (1) comprises a cylinder body (11) and an end cover (12), the cylinder body (11) is connected with the end cover (12), and the cylinder body (11) and the end cover (12) can form a storage cavity for storing the metal powder together; The end cover (12) has a second guide surface (122) in a conical shape, and the powder outlet (121) is arranged at the end of the second guide surface (122).

8. The powder feeding device for cladding according to claim 7, characterized by The powder feeding device for cladding further comprises a connecting seat (3), the connecting seat (3) has a connecting channel, one end of the connecting channel is in communication with the powder outlet (121), and the other end of the connecting channel is in communication with the buffer cavity (21); Positioning parts (4) are arranged between the connecting seat (3) and the end cover (12) and between the connecting seat (3) and the powder feeding part (2).

9. The powder feeding device for cladding according to claim 1, characterized by The powder feeding device for cladding further comprises a stirring part (5), the stirring part (5) is arranged in the inside of the powder storage part (1), and the stirring part (5) is used for stirring the metal powder.

10. The powder feeding device for cladding according to claim 9, characterized by The stirring part (5) comprises a stirring shaft (51) and a plurality of stirring pieces (52) arranged on the stirring shaft (51), the stirring shaft (51) can rotate around its own axis, and the end of the stirring shaft (51) is opposite to the powder outlet (121).

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