A pneumatic powder feeding and uniform material distribution device and its processing method

Abstract

This invention relates to a pneumatic powder feeding and distributing device, providing a pneumatic powder feeding and uniform distribution device and its processing method, solving the problem of uneven distribution in existing powder distribution devices. The device includes a powder distributor body, with a circular powder inlet at the center of one end face and N powder outlets evenly distributed along the same circumference on the other end face, where N is a positive integer greater than or equal to 2. The N powder outlets are sector-shaped with the same cross-sectional shape and size. The size of the circle formed by splicing the N sector-shaped outlets is the same as the cross-sectional shape of the circular powder inlet, and the sector angle of each sector is 360° / N. The N powder outlets are connected to the powder inlet through N sector-shaped channels of the same shape. This device uses the physical principle of area division to evenly divide the powder inlet area into N equal parts, achieving uniform distribution.

Description

Technical Field

[0001] The invention relates to a pneumatic powder feeding and distributing device, in particular to a pneumatic powder feeding and distributing uniform material device and a processing method thereof. Background Art

[0002] In the process of laser additive processing, a pneumatic powder feeding device is usually used to supply additive powder, and the laser is used to process the additive powder so that it is melted on the surface of the substrate to form an additive. In the additive process, the uniformity of powder feeding plays a key role in improving the surface quality after additive processing and the quality of the bonding layer between the substrate and the powder.

[0003] Usually, a coaxial annular laser cladding head is used for cladding additive processing. The powder is first fed by a pneumatic powder feeder, and then the powder is divided into several portions by a pneumatic powder feeding and dividing device. After the several portions of powder are gathered by the annular cladding head, a powder spot coaxial with the light spot is formed, and then after laser processing, it is clad on the substrate to form additive processing. However, the powder feeding and dividing device adopts a volumetric powder divider, one end face of which is provided with a powder inlet, and the other end face is provided with multiple powder outlets. The additive powder in the powder divider chamber is pneumatically sent out from the powder outlet. Since the volumetric powder feeder reduces the gas pressure, the powder is not subjected to stress. The state, especially the influence of gravity, changes the suspension state, forming an uneven atmospheric suspension state, thereby affecting the uniformity of the powder distribution, and further affecting the quality of the additive processing. Summary of the invention

[0004] In order to solve the technical problem of uneven material distribution in existing powder distribution devices, the present invention provides a pneumatic powder feeding and uniform material distribution device and a processing method thereof.

[0005] To achieve the above purpose, the technical solution provided by the present invention is:

[0006] A pneumatic powder feeding and uniform material distribution device is special in that it comprises a powder distributor body, a circular powder inlet is arranged at the center of one end face of the powder distributor body, and N powder outlets are arranged on the other end face of the powder distributor body and are evenly distributed along the same circumference, where N is a positive integer greater than or equal to 2; the N powder outlets are sectors with the same cross-sectional shape and size, the size of the circle after the N sectors are spliced ​​is the same as the cross-sectional shape of the circular powder inlet, and the sector angle of each sector is 360° / N; the N powder outlets are respectively connected to the powder inlet through N sector-shaped channels with the same shape as the powder outlets.

[0007] Furthermore, it also includes an upper cover arranged on one end face of the powder separator body and a lower cover arranged on the other end face of the powder separator body; the upper cover and the lower cover are both sealed and connected to the powder separator body; the upper cover is provided with a powder inlet through hole and a pneumatic inlet joint, the pneumatic inlet joint is arranged at the powder inlet through hole, and one end of the pneumatic inlet joint is connected to the circular powder inlet port; the lower cover is provided with N circumferentially evenly distributed powder outlet through holes and N pneumatic outlet joints, the N powder outlet through holes correspond to the positions of the N powder outlets, the N pneumatic outlet joints are respectively arranged at the N powder outlet through holes, and one end of the pneumatic outlet joint is connected to the powder outlet port.

[0008] Furthermore, N=2, 3, 4, 5, 6.

[0009] Furthermore, an upper sealing ring is provided between the powder distributor body and the upper cover;

[0010] A lower sealing ring is arranged between the powder distributor body and the lower cover.

[0011] Furthermore, the powder distributor body is a cylinder.

[0012] Furthermore, the powder separator body is processed once by wire cutting.

[0013] At the same time, the present invention provides a method for processing a pneumatic powder feeding and uniform material distribution device, which is special in that it includes the following steps:

[0014] 1) Processing the powder distributor body;

[0015] 2) On the online cutting equipment, with the center of one end surface of the powder divider body as the center of the circle, design the pattern to be processed, the pattern being a sector divided into N equal parts by the same circle;

[0016] 3) Using wire cutting processing, N sector-shaped channels penetrating the two end faces of the separator body are processed N times respectively, and there is an angle between the center line of the sector-shaped channel and the central axis of the processed separator body, one end of the N sector-shaped channels is at the N equally divided sectors at one end of the separator body, and the other end is evenly distributed on the same circumference of the other end face of the separator body.

[0017] Compared with the prior art, the advantages of the present invention are:

[0018] The material dividing device of the present invention is respectively designed with a circular powder inlet and multiple powder outlets on the two end faces of the powder divider body. The fan-shaped channel between each powder outlet and the circular powder inlet serves as a powder feeding channel for the additive powder. The physical area equalization principle is adopted to evenly divide the powder inlet area (circular powder inlet) into N equal areas (fan-shaped powder outlets). There are N material channels divided with equal areas, which can evenly divide the powder material into N equal parts. The additive powder is fed in through the N fan-shaped channels to achieve the purpose of uniform material distribution. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 2 is a schematic structural diagram of a first embodiment of a pneumatic powder feeding and uniform material distribution device according to the present invention;

[0020] Figure 2 yes Figure 1 Left view of

[0021] Figure 3 yes Figure 1 Right view of;

[0022] Figure 4 It is an exploded view of the first embodiment of the pneumatic powder feeding and uniform material distribution device of the present invention;

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the powder distributor body in the first embodiment of the pneumatic powder feeding and uniform material distribution device of the present invention;

[0024] Figure 6 The structure of the powder distributor body in the first embodiment of the pneumatic powder feeding and uniform material distribution device of the present invention is shown in FIG. Figure 1 ;

[0025] Figure 7 The structure of the powder distributor body in the first embodiment of the pneumatic powder feeding and uniform material distribution device of the present invention is shown in FIG. Figure 2 ;

[0026] Figure 8 The structure of the powder distributor body in the first embodiment of the pneumatic powder feeding and uniform material distribution device of the present invention is shown in FIG. Figure 3 ;

[0027] Fig. 9 It is a schematic diagram of the coordination of three powder outlets and a powder inlet in the first embodiment of the pneumatic powder feeding and uniform material distribution device of the present invention;

[0028] Fig.10 It is a schematic diagram of the structure of the powder distributor body in the second embodiment of the pneumatic powder feeding and uniform material distribution device of the present invention (the end face with the powder outlet);

[0029] Fig.11 It is a schematic diagram of the structure of the powder distributor body in the third embodiment of the pneumatic powder feeding and uniform material distribution device of the present invention (with a powder outlet end face);

[0030] The reference numerals are as follows:

[0031] 1-pneumatic outlet connector, 2-lower cover, 21-powder outlet hole, 3-lower sealing ring, 4-powder distributor body, 41-circular powder inlet, 42-powder outlet, 43-fan-shaped channel, 5-upper sealing ring, 6-upper cover, 61-powder inlet hole, 7-screw, 8-pneumatic outlet connector. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0033] Embodiment 1

[0034] like Figures 1 to 9 As shown, a pneumatic powder feeding and uniform material distribution device includes a powder distributor body 4, which is a cylinder. The powder distributor body is a device for directly evenly distributing powder delivered from a powder feeding pipe. A circular powder inlet 41 is arranged at the center of one end face of the powder distributor body 4, and three powder outlets 42 are arranged on the other end face along the same circumference. The three powder outlets 42 are sectors with the same cross-sectional shape and size. The size of the circle after the three sectors are spliced ​​is the same as the cross-sectional shape of the circular powder inlet 41. The sector angle of each sector is 120°, three powder outlets 42 are connected to the powder inlet through three fan-shaped channels 43 of the same shape; the sum of the cross-sectional areas of the three powder inlets is equal to the cross-sectional area of ​​the powder inlet, and the three fan-shaped channels form a circle overlapping with the circular powder inlet 41 at the powder inlet. The material dividing device of this embodiment adopts the physical area equalization principle to evenly divide the powder inlet area into three equal areas. There are three material channels with equal area divisions, which can evenly divide the powder material into three equal parts to achieve the purpose of uniform material distribution.

[0035] The material distributing device of the present embodiment further comprises an upper cover 6 arranged on one end face of the powder distributor body 4, and a lower cover 2 arranged on the other end face of the powder distributor body 4, and the upper cover 6 and the lower cover 2 are both sealed and connected with the powder distributor body 4; specifically, the upper cover 6 is provided with three through holes evenly distributed along the same circumference, and one end face of the powder distributor body 4 is provided with three threaded holes matching with the through holes along the circumferential direction, and an upper sealing ring 5 is provided between the powder distributor body 4 and the upper cover 6, and the upper cover 6 is fixed to one end face of the powder distributor body 4 by screws 7 passing through the through holes of the upper cover 6 and the threaded holes of one end face of the powder distributor body 4 in sequence, and a powder inlet through hole 61 and a pneumatic inlet joint 8 are provided on the upper cover 6, and the pneumatic inlet joint 8 is provided at the powder inlet through hole 61, and one end of the pneumatic inlet joint 8 is connected to the circular powder inlet port 41 is connected; the lower cover 2 is provided with three through holes evenly distributed around the circumference, and the other end face of the powder distributor body 4 is provided with three threaded holes matching with the through holes along the circumferential direction, a lower sealing ring 3 is provided between the powder distributor body 4 and the lower cover 2, and the lower cover 2 is fixed to the other end face of the powder distributor body 4 by screws 7 passing through the through holes of the lower cover 2 and the threaded holes on the other end face of the powder distributor body 4 in sequence; the lower cover 2 is provided with three powder outlet through holes 21 evenly distributed around the circumference and three pneumatic outlet joints 1, the three powder outlet through holes 21 correspond to the positions of the three powder outlet ports 42, and the cross-sectional area of ​​the powder outlet through holes 21 should be larger than the cross-sectional area of ​​the fan-shaped powder outlet port 42, the three pneumatic outlet joints 1 are respectively arranged at the three powder outlet through holes 21, and one end of the pneumatic outlet joint 1 is connected to the powder outlet port 42.

[0036] In the material dividing device of this embodiment, the powder divider body 4 is processed by wire cutting at one time; sealing rings are arranged between the powder divider body 4 and the upper cover 6 and between the powder divider body 4 and the lower cover 2 to seal the powder feeding gas.

[0037] At the same time, this embodiment provides a method for processing a pneumatic powder feeding and uniform material distribution device, comprising the following steps:

[0038] 1) Processing the powder distributor body 4;

[0039] 2) On the online cutting equipment, with the center of one end surface of the powder divider body 4 as the center of the circle, design a pattern to be processed, wherein the pattern is a sector divided into three equal parts by the same circle;

[0040] 3) Using wire cutting processing, three sector-shaped channels 43 that pass through the two end surfaces of the separator body 4 are processed separately in three times, and there is an angle between the center line of the sector-shaped channel 43 and the central axis of the processed separator body 4, one end of the three sector-shaped channels 43 is at the three equally divided sectors at one end of the separator body 4, the size of the circle after splicing one end of the three sector-shaped channels is the same as the cross-sectional shape of the circular powder inlet 41, and the other ends of the three sector-shaped channels 43 are evenly distributed on the same circumference of the other end surface of the separator body 4.

[0041] Embodiment 2

[0042] The difference from the embodiment is that: Fig.10 As shown, the other end surface of the powder distributor body 4 in the pneumatic powder feeding and uniform material distribution device is provided with five powder outlets 42 evenly distributed along the same circumference; the sector angle of the powder outlets 42 is 72°.

[0043] In the processing method of the pneumatic powder feeding and uniform material distribution device, in step 3), five fan-shaped channels 43 penetrating the two end surfaces of the powder distributor body 4 are processed respectively in five times by wire cutting.

[0044] Embodiment 3

[0045] The difference from the embodiment is that: Fig.11 As shown, the other end surface of the powder distributor body 4 in the pneumatic powder feeding and uniform material distribution device is provided with 6 powder outlets 42 evenly distributed along the same circumference; the fan-shaped angle of the powder outlet 42 is 60°.

[0046] In the processing method of the pneumatic powder feeding and uniform material distribution device, in step 3), six fan-shaped channels 43 penetrating the two end surfaces of the powder distributor body 4 are processed separately in six steps by wire cutting.

[0047] The above is only a description of the preferred implementation mode of the present invention, and the technical solution of the present invention is not limited thereto. Any known deformation made by those skilled in the art on the basis of the main technical concept of the present invention belongs to the technical scope to be protected by the present invention.

Claims

1. A pneumatic powder feeding and uniform material distribution device, characterized in that: The powder separator body (4) comprises a circular powder inlet (41) arranged at the center of one end surface of the powder separator body (4), and N powder outlets (42) evenly distributed along the same circumference are arranged at the other end surface of the powder separator body (4), wherein N is a positive integer greater than or equal to 2; The N powder outlets (42) are sectors with the same cross-sectional shape and size, the size of the circle after the N sectors are spliced ​​is the same as the cross-sectional shape of the circular powder inlet (41), and the sector angle of each sector is 360° / N; The N powder outlets (42) are respectively communicated with the powder inlet through N fan-shaped channels (43) having the same shape as the powder outlets (42).

2. The pneumatic powder feeding and uniform material distribution device according to claim 1 is characterized in that: It also includes an upper cover (6) arranged on one end surface of the powder separator body (4) and a lower cover (2) arranged on the other end surface of the powder separator body (4); The upper cover (6) and the lower cover (2) are both sealedly connected to the powder distributor body (4); The upper cover (6) is provided with a powder inlet through hole (61) and a pneumatic inlet joint (8), wherein the pneumatic inlet joint (8) is arranged at the powder inlet through hole (61), and one end of the pneumatic inlet joint (8) is connected to the circular powder inlet port (41); The lower cover (2) is provided with N powder outlet through holes (21) evenly distributed around the circumference and N pneumatic outlet joints (1), the N powder outlet through holes (21) corresponding to the positions of the N powder outlet ports (42), the N pneumatic outlet joints (1) being respectively arranged at the N powder outlet through holes (21), and one end of the pneumatic outlet joint (1) being connected to the powder outlet port (42).

3. The pneumatic powder feeding and uniform material distribution device according to claim 2 is characterized in that: Said N=2, 3, 4, 5, 6.

4. The pneumatic powder feeding and uniform material distribution device according to claim 3 is characterized in that: An upper sealing ring (5) is provided between the powder distributor body (4) and the upper cover (6); A lower sealing ring (3) is provided between the powder distributor body (4) and the lower cover (2).

5. The pneumatic powder feeding and uniform material distribution device according to claim 4 is characterized in that: The powder distributor body (4) is a cylinder.

6. The pneumatic powder feeding and uniform material distribution device according to claim 5 is characterized in that: The powder distributor body (4) is processed once by wire cutting.

7. A method for processing a pneumatic powder feeding and uniform material distribution device, characterized in that: The following steps are involved: 1) Processing the powder distributor body (4); 2) On the online cutting device, taking the center of one end surface of the powder divider body (4) as the center of the circle, design a pattern to be processed, wherein the pattern is a sector divided into N equal parts by the same circle; 3) using a wire cutting process, processing N sector-shaped channels (43) penetrating the two end faces of the separator body (4) respectively in N times, wherein an angle exists between the center line of the sector-shaped channel (43) and the center axis of the processed separator body (4), one end of the N sector-shaped channels (43) is located at N equally divided sectors at one end of the separator body (4), and the other end is evenly distributed on the same circumference of the other end face of the separator body (4).

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