Powder mixer device for laser cladding processing and use method

Abstract

The application relates to the field of laser cladding technology, in particular to a powder mixer device for laser cladding processing and a use method, which comprises a central conveying sleeve rod, the upper end of the central conveying sleeve rod is provided with a feeding and mixing module, the bottom end of the central conveying sleeve rod is provided with a temporary storage and discharging module, the feeding and mixing module is composed of a feeding guide unit and a mixing and conveying unit, the mixing and conveying unit is located on the inner side of the feeding guide unit, the feeding guide unit comprises a feeding shell, a plurality of feeding joints are fixedly arranged on the upper end of the feeding shell, a connecting seat is slidably connected to the inner side of the bottom end of the feeding shell, an adjusting slide strip is arranged on one side of the connecting seat, and a connecting head is arranged on the inner side of the bottom end of the adjusting slide strip. The multiple-component powder is mixed and discharged in multiple ways, so that the powder is highly uniform in macro and micro scales, the phenomena of reinforcing phase segregation and agglomeration are effectively avoided, and the cladding layer organization is uniform and stable in performance.

Description

Technical Field

[0001] This invention relates to the field of laser cladding technology, specifically to a powder mixer device and its usage method for laser cladding processing. Background Technology

[0002] Laser cladding technology is an advanced surface modification and additive manufacturing technology that significantly improves the wear resistance and corrosion resistance of parts by cladding alloy powder onto the surface of a substrate. During the laser cladding process, the powder feeding quality directly affects the forming quality, microstructure uniformity, and performance stability of the cladding layer. Laser cladding powder feeding systems typically employ a carrier gas feeding method, directly delivering powder to the laser cladding head through a powder feeder and pipeline.

[0003] Existing methods for feeding multi-component powders rely on natural turbulence within the powder feeder for mixing. This results in short mixing time and a simple mixing path before the powder reaches the molten pool, making it difficult to achieve uniform distribution at the microscale. This leads to uneven distribution of the reinforcing phase in the cladding layer, affecting performance consistency. Furthermore, when using multi-beam coaxial powder feeding, differences in the length, curvature, and resistance of each powder feeding pipe result in inconsistent powder flow rate and velocity at each outlet, causing uneven cladding layer thickness and fluctuations in dilution rate. Therefore, these methods do not meet current requirements. To address this, we propose a powder mixer device and its usage method for laser cladding processing. Summary of the Invention

[0004] The purpose of this invention is to provide a powder mixer device and method for use in laser cladding processing, in order to solve the problems mentioned in the background art. When feeding multi-component powders, the existing method relies on natural turbulence within the powder feeder for mixing. The mixing time before the powder reaches the molten pool is short and the mixing path is simple, making it difficult to achieve uniform distribution at the microscale. This results in uneven distribution of the reinforcing phase in the cladding layer, affecting performance consistency. Furthermore, when using multi-beam coaxial powder feeding, the length, curvature, and resistance of each powder feeding pipeline vary, leading to inconsistent powder flow rate and velocity at each powder outlet, resulting in uneven cladding layer thickness and fluctuations in dilution rate.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a powder mixer device for laser cladding processing, comprising a central conveying sleeve, a feeding mixing module installed at the upper end of the central conveying sleeve, and a temporary discharge module installed at the bottom end of the central conveying sleeve. The feeding mixing module consists of a feeding guide unit and a mixing conveying unit. The mixing conveying unit is located inside the feeding guide unit. The feeding guide unit includes a feeding housing, a plurality of feeding connectors fixedly installed at the upper end of the feeding housing, a connecting seat slidably connected to the inner side of the bottom end of the feeding housing, an adjusting slide bar installed on one side of the connecting seat, a connecting head installed on the inner side of the bottom end of the adjusting slide bar, and a locking knob installed on the inner side of the upper end of the adjusting slide bar. The mixing and conveying unit includes two mixing shells, with a mixing chamber and a conveying chamber between the two mixing shells. The mixing chamber is located directly above the conveying chamber. A mixing and stirring frame is installed inside the mixing chamber, and a mixing spiral blade is installed inside the conveying chamber. A drive shaft is fixedly installed inside the mixing and stirring frame and the mixing spiral blade. A limit ring is rotatably connected to the outer side of the upper end of the drive shaft. A temporary storage chamber is provided between the mixing shell and the connecting seat.

[0006] Preferably, the temporary discharge module includes a discharge housing, a connecting sleeve is fixedly installed at the upper end of the discharge housing, a plurality of vent holes are provided on the outer surface of the bottom end of the connecting sleeve, an adjusting rod is threadedly connected to the inner side of one of the vent holes, a movable conveying pipe is installed at the bottom end of the adjusting rod, a powder separation chamber is provided between the bottom end of the movable conveying pipe and the discharge housing, and a plurality of discharge connectors are fixedly installed at the bottom end of the discharge housing.

[0007] Preferably, the feeding and mixing module, the central conveying sleeve, and the temporary storage and discharging module are coaxial. The two ends of the central conveying sleeve are respectively connected to the connecting seat and the connecting sleeve by threads. The mixing chamber, the conveying chamber, and the temporary storage chamber form a powder mixing chamber. A powder conveying channel is provided on the inner side of the central conveying sleeve. The powder mixing chamber and the powder separating chamber are connected through the powder conveying channel.

[0008] Preferably, the plurality of feed connectors and discharge connectors are arranged circumferentially relative to the feed housing and discharge housing, respectively. The plurality of feed connectors and discharge connectors are quick-connect connectors. The conveying direction of the plurality of feed connectors and discharge connectors forms an acute angle with the axis of the central conveying sleeve. The powder flow rate and speed of the plurality of discharge connectors are consistent. The plurality of feed connectors are divided into multiple groups, and each group of feed connectors conveys powders of different components.

[0009] Preferably, the bottom end of the drive shaft passes through the limiting ring and the feed housing in sequence and is inserted into the mixing chamber and the conveying chamber. The mixing chamber and the conveying chamber are separated by the middle of the mixing shell. The two mixing shells are fixedly connected to the feed housing. The drive shaft is rotatably connected to the feed housing. The limiting ring is fixedly connected to the feed housing.

[0010] Preferably, a groove is provided on one side of the lower part of the feed housing, the adjusting slide is disposed inside the groove, the inner wall of the groove is provided with an oblong hole, one end of the connector passes through the adjusting slide and the oblong hole and is threadedly connected to the connector seat, and the feed housing is slidably connected to the connector seat and the adjusting slide.

[0011] Preferably, one end of the locking knob passes through the adjusting slide and is in contact with the outer surface of the feed housing. The locking knob and the adjusting slide are connected by threads, and the adjusting slide and the feed housing are locked together by the locking knob.

[0012] Preferably, the powder conveying channel and the powder separation chamber are connected through a connecting sleeve and a movable conveying pipe. The upper end of the movable conveying pipe is inserted into the inner side of the connecting sleeve and is slidably connected to the connecting sleeve and the discharge housing. The bottom end of the adjusting rod passes through one of the vent holes and is rotatably connected to the bottom end of the movable conveying pipe.

[0013] Preferably, the powder separation chamber is connected in a through connection with multiple discharge joints, and the multiple discharge joints are located above the molten pool.

[0014] The method of using the powder mixer device for laser cladding includes the following steps: S1: Install the feeding and mixing module and the temporary discharge module to both ends of the central conveying sleeve, and then connect multiple feeding connectors to the powder feeding nozzles of the laser cladding head through pipelines. Multiple discharge connectors are set above the molten pool. Powders of multiple components are input into the powder mixing chamber through multiple sets of feeding connectors. S2: Specifically, when the power is turned on, the drive shaft synchronously drives the mixing rack and mixing spiral blades to rotate under the drive of the external power source. The multi-component powder entering the mixing chamber undergoes the first mixing under the action of tangential swirling flow through the mixing rack. Then, when it is guided to the conveying chamber through the two mixing shells, the multi-component powder can undergo a second mixing through the mixing spiral blades. At the same time, the powder conveying rate can be controlled by adjusting the speed of the mixing spiral blades. After the two mixing, the powder enters the inner side of the temporary storage chamber, where the mixed powder can be temporarily stored for the first time. S3: Adjust the feed housing. Specifically, the feed housing slides vertically relative to the connecting seat under the guidance of the adjusting slide bar, and the feed housing and adjusting slide bar are locked by the locking knob. Then, the feed housing drives the two mixing shells and the connecting seat to adjust the distance, which can adjust the volume of the temporary storage chamber and realize the control of the first temporary storage amount of the mixed powder in the temporary storage chamber. S4: The mixed powder is conveyed to the temporary storage and discharge module through the powder conveying channel in the central conveying sleeve. Specifically, the mixed powder is conveyed to the powder distribution chamber through the connecting sleeve and the movable conveying pipe and output through multiple discharge joints. The powder distribution chamber can perform a second temporary storage and a second mixing of the mixed powder. The multiple discharge joints can divert the mixed powder to maintain a uniform discharge of the mixed powder. S5: Rotate the adjusting rod so that the adjusting rod drives the movable conveying pipe to slide and adjust inside the discharge shell and connecting sleeve, thereby satisfying the capacity adjustment of the powder separation chamber and realizing the control of the temporary storage amount of mixed powder in the powder separation chamber. The mixed powder is transported to the molten pool through multiple discharge joints, and a third mixing is carried out under the action of laser energy and molten pool convection, and finally solidifies to form a cladding layer.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention inputs powders of multiple components into a mixing chamber through multiple sets of feed connectors. The powders entering the mixing chamber undergo a first mixing under tangential swirling action by a mixing stirrer. A second mixing is performed by mixing spiral blades. The powder conveying rate can be controlled by adjusting the rotation speed of the mixing spiral blades. The mixed powder is temporarily stored in a storage chamber. The mixed powder is then conveyed to a powder distribution chamber through a connecting sleeve and a movable conveying pipe and output through multiple discharge connectors. The powder distribution chamber performs a second temporary storage and a second mixing. The powder is also divided by multiple discharge connectors to maintain uniform discharge of the mixed powder, ensuring high uniformity of the powder at both the macroscopic and microscopic scales. This effectively avoids the segregation and agglomeration of the reinforcing phase, ensuring a uniform structure and stable performance of the cladding layer. 2. In this invention, the feeding shell slides vertically relative to the connecting seat under the guidance of the adjusting slide bar, and the feeding shell and the adjusting slide bar are locked by the locking knob. Then, the feeding shell drives the two mixing shells and the connecting seat to adjust the distance, which can adjust the volume of the temporary storage chamber, thereby controlling the amount of mixed powder temporarily stored in the temporary storage chamber. When the adjusting rod rotates, it drives the movable conveying pipe to slide and adjust inside the discharge shell and the connecting sleeve, thereby satisfying the capacity adjustment of the powder separation chamber and realizing the control of the amount of mixed powder temporarily stored in the powder separation chamber. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 Enlarged structural diagram of region A in the middle; Figure 3 This is a cross-sectional structural diagram of the connector of the present invention; Figure 4 This is a cross-sectional structural diagram of the feeding and mixing module of the present invention; Figure 5 This is an exploded structural diagram of the mixing and conveying unit of the present invention; Figure 6 For the present invention Figure 1 A magnified structural diagram of region B in the middle; Figure 7 This is a cross-sectional structural diagram of the temporary material discharge module of the present invention.

[0017] In the diagram: 1. Feeding and mixing module; 101. Feeding guide unit; 102. Mixing and conveying unit; 103. Feeding shell; 104. Feeding connector; 105. Adjusting slide bar; 106. Connector; 107. Locking knob; 108. Connecting seat; 109. Drive shaft; 110. Limiting ring; 111. Mixing and stirring frame; 112. Mixing spiral blade; 113. Mixing shell; 114. Mixing chamber; 115. Conveying chamber; 116. Temporary storage chamber; 2. Central conveying sleeve; 3. Temporary storage and discharge module; 301. Connecting sleeve; 302. Discharge shell; 303. Discharge connector; 304. Vent; 305. Adjusting rod; 306. Powder separation chamber; 307. Movable conveying pipe. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0019] Please see Figure 1 An embodiment of the present invention provides a powder mixer device for laser cladding processing, including a central conveying sleeve 2. A feeding mixing module 1 is installed at the upper end of the central conveying sleeve 2, and a temporary storage discharge module 3 is installed at the bottom end of the central conveying sleeve 2. The feeding mixing module 1, the central conveying sleeve 2, and the temporary storage discharge module 3 are coaxial. The feeding mixing module 1 consists of a feeding guide unit 101 and a mixing and conveying unit 102. The powder can be mixed and uniformly output through the feeding mixing module 1 and the temporary storage discharge module 3.

[0020] Please see Figures 2 to 4The mixing and conveying unit 102 is located inside the feeding guide unit 101. The feeding guide unit 101 includes a feeding housing 103. Multiple feeding connectors 104 are fixedly installed on the upper end of the feeding housing 103. A connecting seat 108 is slidably connected to the inner side of the bottom end of the feeding housing 103. An adjusting slide 105 is installed on one side of the connecting seat 108. A connector 106 is installed on the inner side of the bottom end of the adjusting slide 105. A locking knob 107 is installed on the inner side of the upper end of the adjusting slide 105. A groove is provided on one side of the lower part of the feeding housing 103. The adjusting slide 105 is located inside the groove. The inner wall of the groove is provided with an oblong hole. One end of the connector 106 passes through the adjusting slide 105 and the oblong hole and connects to the connecting seat 104. 8. The feed housing 103 is slidably connected to the connecting seat 108 and the adjusting slide 105 via a threaded connection. One end of the locking knob 107 passes through the adjusting slide 105 and is in contact with the outer surface of the feed housing 103. The locking knob 107 and the adjusting slide 105 are connected by a thread. The adjusting slide 105 and the feed housing 103 are locked together by the locking knob 107. Under the guidance of the adjusting slide 105, the feed housing 103 slides vertically relative to the connecting seat 108. After the feed housing 103 drives the two mixing shells 113 to adjust the distance between the two mixing shells 113 and the connecting seat 108, the volume of the temporary storage chamber 116 can be adjusted, thereby realizing the control of the first temporary storage amount of the mixed powder in the temporary storage chamber 116.

[0021] Please see Figure 2 , Figure 4 and Figure 5 The mixing and conveying unit 102 includes two mixing shells 113, with a mixing chamber 114 and a conveying chamber 115 between them. The mixing chamber 114 is located directly above the conveying chamber 115. A mixing and stirring frame 111 is installed inside the mixing chamber 114, and a mixing spiral blade 112 is installed inside the conveying chamber 115. A drive shaft 109 is fixedly installed inside the mixing and stirring frame 111 and the mixing spiral blade 112. A limit ring 110 is rotatably connected to the outer side of the upper end of the drive shaft 109. A temporary storage chamber 116 is provided between the mixing shell 113 and the connecting seat 108. The bottom end of the drive shaft 109 passes through the limit ring 110 in sequence. 10 and the feed housing 103 are inserted into the mixing chamber 114 and the conveying chamber 115. The mixing chamber 114 and the conveying chamber 115 are separated by the middle of the mixing housing 113. The two mixing housings 113 are fixedly connected to the feed housing 103. The drive shaft 109 is rotatably connected to the feed housing 103. The limiting ring 110 is fixedly connected to the feed housing 103. The multi-component powder is first mixed by the mixing and stirring frame 111 under the action of tangential swirling flow. The multi-component powder can be mixed a second time by the mixing spiral blade 112. At the same time, the powder conveying rate can be controlled by adjusting the rotation speed of the mixing spiral blade 112.

[0022] Please see Figure 1 , Figure 6 and Figure 7 The temporary discharge module 3 includes a discharge housing 302. A connecting sleeve 301 is fixedly installed on the upper end of the discharge housing 302. The outer surface of the bottom end of the connecting sleeve 301 is provided with multiple vent holes 304. An adjusting rod 305 is threadedly connected to the inner side of one of the vent holes 304. A movable conveying pipe 307 is installed on the bottom end of the adjusting rod 305. A powder separation chamber 306 is provided between the bottom end of the movable conveying pipe 307 and the discharge housing 302. Multiple discharge connectors 303 are fixedly installed on the bottom end of the discharge housing 302. The powder conveying channel and the powder separation chamber 306 are connected through the connecting sleeve 301 and the movable conveying pipe 307. The upper end of the movable conveying pipe 307 is inserted into the inner side of the connecting sleeve 301 and is slidably connected to the connecting sleeve 301 and the discharge housing 302. The bottom end of the adjusting rod 305 passes through one of the vent holes 304 and is rotatably connected to the bottom end of the movable conveying pipe 307. The powder separation chamber 306 is connected to multiple discharge joints 303. The multiple discharge joints 303 are located above the molten pool. The adjusting rod 305 drives the movable conveying pipe 307 to slide and adjust inside the discharge housing 302 and the connecting sleeve 301, thereby satisfying the capacity adjustment of the powder separation chamber 306 and realizing the control of the temporary storage amount of mixed powder in the powder separation chamber 306.

[0023] Please see Figure 4 and Figure 7 The two ends of the central conveying sleeve 2 are connected to the connecting seat 108 and the connecting sleeve 301 by threads, respectively. The mixing chamber 114, the conveying chamber 115 and the temporary storage chamber 116 form a powder mixing chamber. The inner side of the central conveying sleeve 2 is provided with a powder conveying channel. The powder mixing chamber and the powder separating chamber 306 are connected through the powder conveying channel. Multiple feed joints 104 and discharge joints 303 are arranged in a circle relative to the feed housing 103 and the discharge housing 302, respectively. Multiple feed joints 104 and discharge joints 303 are quick-connect joints. The conveying direction of multiple feed joints 104 and discharge joints 303 is at an acute angle to the axis of the central conveying sleeve 2. The powder flow rate and speed of multiple discharge joints 303 are consistent. Multiple feed joints 104 are divided into multiple groups. Each group of feed joints 104 conveys powders of different components. The powder separating chamber 306 can perform a second temporary storage and a second mixing of the mixed powder. The powder separating chamber 303 can divide the mixed powder.

[0024] The method of using the powder mixer device for laser cladding includes the following steps: S1: Install the feeding and mixing module 1 and the temporary discharge module 3 to both ends of the central conveying sleeve 2 respectively, and then connect multiple feeding connectors 104 to the powder feeding nozzle of the laser cladding head through pipelines, and set multiple discharge connectors 303 above the molten pool. Powders of multiple components are input into the powder mixing chamber through multiple sets of feeding connectors 104. S2: Specifically, when the power is turned on, the drive shaft 109 synchronously drives the mixing rack 111 and the mixing spiral blade 112 to rotate under the drive of the external power source. The multi-component powder entering the mixing chamber 114 is first mixed by the mixing rack 111 under the action of tangential swirling flow. Then, when it is guided to the conveying chamber 115 through the two mixing shells 113, the multi-component powder can be mixed a second time by the mixing spiral blade 112. At the same time, the powder conveying rate can be controlled by adjusting the speed of the mixing spiral blade 112. After the two mixing, the powder enters the inner side of the temporary storage chamber 116, and the mixed powder can be temporarily stored in the temporary storage chamber 116 for the first time. S3: Adjust the feed housing 103. Specifically, the feed housing 103 slides vertically relative to the connecting seat 108 under the guidance of the adjusting slide bar 105, and the feed housing 103 and the adjusting slide bar 105 are locked by the locking knob 107. Then, the feed housing 103 drives the two mixing shells 113 to adjust the distance between the two mixing shells 113 and the connecting seat 108, which can adjust the volume of the temporary storage chamber 116, so as to realize the control of the first temporary storage amount of the mixed powder in the temporary storage chamber 116. S4: The mixed powder is conveyed to the temporary storage and discharge module 3 through the powder conveying channel in the central conveying sleeve 2. Specifically, the mixed powder is conveyed to the powder distribution chamber 306 through the connecting sleeve 301 and the movable conveying pipe 307 and output through multiple discharge joints 303. The powder distribution chamber 306 can perform a second temporary storage and a second mixing of the mixed powder. The multiple discharge joints 303 can divert the mixed powder to maintain uniform discharge of the mixed powder. S5: Rotate the adjusting rod 305 so that the adjusting rod 305 drives the movable conveying pipe 307 to slide and adjust inside the discharge housing 302 and the connecting sleeve 301, thereby satisfying the capacity adjustment of the powder separation chamber 306, realizing the control of the temporary storage amount of mixed powder in the powder separation chamber 306, and conveying the mixed powder to the molten pool through multiple discharge joints 303. Under the action of laser energy and molten pool convection, it undergoes a third mixing and finally solidifies to form a cladding layer.

[0025] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A powder mixer device for laser cladding processing, comprising a central conveying sleeve (2), characterized in that: The upper end of the central conveying sleeve (2) is equipped with a feeding and mixing module (1), and the lower end of the central conveying sleeve (2) is equipped with a temporary storage and discharge module (3). The feeding and mixing module (1) consists of a feeding guide unit (101) and a mixing and conveying unit (102). The mixing and conveying unit (102) is located inside the feeding guide unit (101). The feeding guide unit (101) includes a feeding housing (103). Multiple feeding connectors (104) are fixedly installed on the upper end of the feeding housing (103). A connecting seat (108) is slidably connected to the inner side of the bottom end of the feeding housing (103). An adjusting slide (105) is installed on one side of the connecting seat (108). A connector (106) is installed on the inner side of the bottom end of the adjusting slide (105). A locking knob (107) is installed on the inner side of the upper end of the adjusting slide (105). The mixing and conveying unit (102) includes two mixing shells (113), and a mixing chamber (114) and a conveying chamber (115) are provided between the two mixing shells (113). The mixing chamber (114) is located directly above the conveying chamber (115). A mixing and stirring rack (111) is installed on the inner side of the mixing chamber (114), and a mixing spiral blade (112) is installed on the inner side of the conveying chamber (115). A drive shaft (109) is fixedly installed on the inner side of the mixing and stirring rack (111) and the mixing spiral blade (112). A limit ring (110) is rotatably connected to the outer side of the upper end of the drive shaft (109). A temporary storage chamber (116) is provided between the mixing shell (113) and the connecting seat (108).

2. The powder mixer device for laser cladding processing according to claim 1, characterized in that: The temporary discharge module (3) includes a discharge housing (302). A connecting sleeve (301) is fixedly installed on the upper end of the discharge housing (302). The outer surface of the bottom end of the connecting sleeve (301) is provided with multiple vent holes (304). An adjusting rod (305) is threadedly connected to the inner side of one of the vent holes (304). A movable conveying pipe (307) is installed at the bottom end of the adjusting rod (305). A powder separation chamber (306) is provided between the bottom end of the movable conveying pipe (307) and the discharge housing (302). Multiple discharge connectors (303) are fixedly installed at the bottom end of the discharge housing (302).

3. The powder mixer device for laser cladding processing according to claim 2, characterized in that: The feeding and mixing module (1), the central conveying sleeve (2) and the temporary storage and discharge module (3) are coaxial. The two ends of the central conveying sleeve (2) are connected to the connecting seat (108) and the connecting sleeve (301) by threads, respectively. The mixing chamber (114), the conveying chamber (115) and the temporary storage chamber (116) form a powder mixing chamber. The inner side of the central conveying sleeve (2) is provided with a powder conveying channel. The powder mixing chamber and the powder separation chamber (306) are connected through the powder conveying channel.

4. The powder mixer device for laser cladding processing according to claim 3, characterized in that: The plurality of feed connectors (104) and discharge connectors (303) are arranged in a circular pattern relative to the feed housing (103) and discharge housing (302), respectively. The plurality of feed connectors (104) and discharge connectors (303) are quick-connect connectors. The conveying direction of the plurality of feed connectors (104) and discharge connectors (303) forms an acute angle with the axis of the central conveying sleeve (2). The powder flow rate and speed of the plurality of discharge connectors (303) are consistent. The plurality of feed connectors (104) are divided into multiple groups, and each group of feed connectors (104) conveys powders of different components.

5. The powder mixer device for laser cladding processing according to claim 4, characterized in that: The bottom end of the drive shaft (109) passes through the limiting ring (110) and the feed housing (103) in sequence and is inserted into the mixing chamber (114) and the conveying chamber (115). The mixing chamber (114) and the conveying chamber (115) are separated by the middle of the mixing shell (113). The two mixing shells (113) are fixedly connected to the feed housing (103). The drive shaft (109) is rotatably connected to the feed housing (103). The limiting ring (110) is fixedly connected to the feed housing (103).

6. The powder mixer device for laser cladding processing according to claim 5, characterized in that: The feed housing (103) has a groove on one side of its lower part. The adjusting slide (105) is located inside the groove. The inner wall of the groove has a waist-shaped hole. One end of the connector (106) passes through the adjusting slide (105) and the waist-shaped hole and is threadedly connected to the connector (108). The feed housing (103) is slidably connected to the connector (108) and the adjusting slide (105).

7. The powder mixer device for laser cladding processing according to claim 6, characterized in that: One end of the locking knob (107) passes through the adjusting slide (105) and is in contact with the outer surface of the feed housing (103). The locking knob (107) and the adjusting slide (105) are connected by threads. The adjusting slide (105) and the feed housing (103) are locked together by the locking knob (107).

8. The powder mixer device for laser cladding processing according to claim 7, characterized in that: The powder conveying channel and the powder separation chamber (306) are connected through a connecting sleeve (301) and a movable conveying pipe (307). The upper end of the movable conveying pipe (307) is inserted into the inner side of the connecting sleeve (301) and is slidably connected to the connecting sleeve (301) and the discharge shell (302). The bottom end of the adjusting rod (305) passes through one of the exhaust holes (304) and is rotatably connected to the bottom end of the movable conveying pipe (307).

9. The powder mixer device for laser cladding processing according to claim 8, characterized in that: The powder separation chamber (306) is connected in a through manner to multiple discharge joints (303), and the multiple discharge joints (303) are located above the molten pool.

10. A method of using a powder mixer device for laser cladding processing, as described in any one of claims 1-9, characterized in that, Includes the following steps: S1: Install the feeding and mixing module (1) and the temporary discharge module (3) to both ends of the central conveying sleeve (2), and then connect multiple feeding connectors (104) to the powder feeding nozzle of the laser cladding head through pipelines, and set multiple discharge connectors (303) above the molten pool. Powders of multiple components are input into the powder mixing chamber through multiple sets of feeding connectors (104); S2: Specifically, when the power is turned on, the drive shaft (109) drives the mixing rack (111) and the mixing spiral blade (112) to rotate synchronously under the drive of the external power source. The multi-component powder entering the mixing chamber (114) is mixed for the first time by the mixing rack (111) under the action of tangential swirling flow. Then, when it is guided to the conveying chamber (115) through the two mixing shells (113), the multi-component powder can be mixed for the second time by the mixing spiral blade (112). At the same time, the powder conveying rate can be controlled by adjusting the rotation speed of the mixing spiral blade (112). After the two mixing, the powder enters the inner side of the temporary storage chamber (116). The mixed powder can be temporarily stored for the first time through the temporary storage chamber (116). S3: Adjust the feed housing (103). Specifically, the feed housing (103) slides vertically relative to the connecting seat (108) under the guidance of the adjusting slide (105), and the feed housing (103) and the adjusting slide (105) are locked by the locking knob (107). Then, the feed housing (103) drives the two mixing shells (113) and the connecting seat (108) to adjust the distance between them, which can adjust the volume of the temporary storage chamber (116) and realize the control of the first temporary storage amount of the mixed powder in the temporary storage chamber (116). S4: The mixed powder is conveyed to the temporary storage and discharge module (3) through the powder conveying channel in the central conveying sleeve (2). Specifically, the mixed powder is conveyed to the powder distribution chamber (306) through the connecting sleeve (301) and the movable conveying pipe (307) and output through multiple discharge joints (303). The powder distribution chamber (306) can perform a second temporary storage and a second mixing of the mixed powder. The multiple discharge joints (303) can divide the mixed powder to maintain uniform discharge of the mixed powder. S5: Rotate the adjusting rod (305) so that the adjusting rod (305) drives the movable conveying pipe (307) to slide and adjust inside the discharge shell (302) and the connecting sleeve (301), thereby satisfying the capacity adjustment of the powder separation chamber (306) and realizing the control of the temporary storage amount of mixed powder in the powder separation chamber (306). The mixed powder is transported to the molten pool through multiple discharge joints (303) and mixed for the third time under the action of laser energy and molten pool convection, and finally solidified to form a cladding layer.

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