Adjustable laser additive manufacturing powder feeding mechanism for metal parts

Abstract

The utility model discloses an adjustable laser additive manufacturing powder feeding mechanism for metal parts, relates to the technical field of laser additive manufacturing, and provides the following scheme aiming at the problems that the strength of finished metal parts cannot meet the production requirement and the practicability is low due to the fact that metal powder made of different materials is mixed in the background technology. Comprising a metal powder cylinder arranged at the top of the laser additive equipment, the metal powder cylinder comprises a cylinder body and a cylinder cover connected to the outer wall of the top of the cylinder body through a bolt, and a mixing mechanism is arranged in the cylinder body; the mixing mechanism comprises a mixing motor, a mounting shaft connected to the bottom end of an output shaft of the mixing motor through a coupler and a plurality of scrapers abutting against the inner wall of the barrel, and a grinding assembly is arranged in the barrel. According to the metal powder grinding device, auxiliary grinding and crushing can be carried out on metal powder, the metal powder on the inner wall of the cylinder body is scraped, the situation that the strength of metal parts does not reach the standard due to mixing of the metal powder made of different materials is avoided, and practicability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of laser additive manufacturing, in particular to an adjustable laser additive manufacturing powder feeding mechanism for metal parts. Background Art

[0002] Laser evaporation deposition technology is a type of laser additive manufacturing technology. Metal powder is delivered into a laser printing gun through a powder feeder, and the metal powder is burned by a laser, causing the metal powder to melt and cool and form on the printing substrate. It is suitable for the one-piece molding of metal parts with complex shapes.

[0003] After searching, a Chinese patent (application number is "202320282116.3") discloses a "powder feeding mechanism for metal additive manufacturing". The above-mentioned powder feeding mechanism includes a storage barrel, a top cover is fixedly installed on the top of the storage barrel, and an inclined tube is symmetrically fixedly connected to the bottom of the storage barrel. An insertion tube is movably inserted into the end of the inclined tube away from the storage barrel, and the insertion tube is fixedly connected to one end of the docking tube. The docking tube is fixedly connected to the top of the side of the powder feeding nozzle, and an extension block is horizontally fixedly connected to the top of the docking tube. A quick-fix component for quickly fixing the powder feeding nozzle is provided on the top of the end of the inclined tube away from the storage barrel. However, during the use of the above-mentioned powder feeding mechanism, metal powder is easily attached to the storage barrel. When laser evaporation deposition is performed on metal parts for additive manufacturing, metal powders of different materials will be mixed, resulting in the strength of the finished metal parts failing to meet production requirements, and the practicality is low. Utility Model Content

[0004] The utility model provides an adjustable powder feeding mechanism for laser additive manufacturing of metal parts, which solves the problem in the reference document that when laser evaporation deposition is performed on metal parts, metal powders of different materials will mix, resulting in the strength of the finished metal parts failing to meet production requirements and low practicality.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] The powder feeding mechanism of the present invention is an adjustable laser additive manufacturing powder feeding mechanism for metal parts, comprising a metal powder cylinder arranged on the top of the laser additive manufacturing equipment, the metal powder cylinder comprising a cylinder body and a cylinder cover connected to the outer wall of the top of the cylinder body by bolts, a mixing mechanism is provided in the cylinder body, the mixing mechanism comprising a mixing motor, a mounting shaft connected to the bottom end of the output shaft of the mixing motor by a coupling, and a plurality of scrapers respectively abutting the inner wall of the cylinder body, a grinding assembly is provided in the cylinder body, the grinding assembly comprises a filter plate connected to the inner wall of the upper part of the cylinder body by bolts and a grinding block fixed on the outer wall of the upper part of the mounting shaft, a powder feeding mechanism is provided below the cylinder body, the powder feeding mechanism comprises a mounting tube and a powder feeding cylinder fixed on the outer wall of the bottom end of the mounting tube, a discharging assembly is provided in the mounting tube, the discharging assembly comprises a discharging motor, a connecting shaft connected to one end of the output shaft of the discharging motor by a coupling, and a plurality of discharging plates respectively fixed on the outer wall of the connecting shaft.

[0007] Preferably, a feed hopper is fixedly provided on the inner wall of the bottom of the cylinder cover, and a discharge pipe is fixedly provided on the inner wall of the bottom of the cylinder body.

[0008] Preferably, a mounting bracket is fixed on the outer wall of the top of the cylinder cover, and the hybrid motor is connected to the outer wall of the top of the mounting bracket by bolts, and a plurality of scrapers are respectively fixed on the outer wall of the mounting shaft.

[0009] Preferably, the filter plate is in a truncated cone shape, and the grinding block abuts against the top outer wall of the filter plate.

[0010] Through the above scheme, the output shaft of the mixing motor rotates to drive the mounting shaft, the grinding block and several scrapers to rotate. The scrapers rotate along the inner wall of the cylinder, thereby scraping off the metal powder attached to the inner wall of the cylinder. At the same time, the scrapers stir and mix the metal powder in the cylinder, and the grinding block rotates along the surface of the filter plate, thereby grinding and crushing the agglomerated metal powder.

[0011] Preferably, a connecting pipe is connected to the outer wall of the bottom end of the discharge pipe through a flange, and the installation pipe is fixed on the outer wall of the bottom end of the connecting pipe, and an air inlet pipe is fixed on the inner wall of one side of the powder feeding cylinder.

[0012] Preferably, a fixing bracket is fixed on the outer wall of one side of the mounting tube, and the unloading motor is connected to the outer wall of one side of the fixing bracket by bolts, one end of the connecting shaft is connected to the inner wall of one side of the mounting tube by a bearing, and several of the unloading plates are respectively abutted against the inner wall of the mounting tube.

[0013] Through the above scheme, the output shaft of the unloading motor rotates to drive several unloading plates to rotate. The unloading plates transport the metal powder that falls into the mounting tube from the cylinder, and transport the metal powder into the powder feeding tube. The air inlet pipe is connected to an external air source, and the external air source transports the metal powder in the powder feeding tube into the laser additive gun head. The amount of metal powder transported can be adjusted by adjusting the speed of the output shaft of the unloading motor.

[0014] The beneficial effects of the utility model are:

[0015] The output shaft of the mixing motor rotates to drive the mounting shaft, the grinding block and several scrapers to rotate. The scrapers rotate along the inner wall of the cylinder to scrape off the metal powder attached to the inner wall of the cylinder. At the same time, the scrapers stir and mix the metal powder in the cylinder. The grinding block rotates along the surface of the filter plate to grind and crush the agglomerated metal powder. It can assist in grinding and crushing the metal powder and scrape off the metal powder on the inner wall of the cylinder to prevent the mixing of metal powders of different materials from causing the strength of metal parts to fail to meet the standards, thereby improving practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the main three-dimensional structure of an adjustable laser additive manufacturing powder feeding mechanism for metal parts proposed in the utility model.

[0017] Figure 2 This is a side sectional structural schematic diagram of an adjustable laser additive manufacturing powder feeding mechanism for metal parts proposed in the utility model.

[0018] Figure 3 This is a schematic diagram of the cross-sectional structure of a metal powder barrel of an adjustable laser additive manufacturing powder feeding mechanism for metal parts proposed in the utility model.

[0019] Figure 4 This is a schematic diagram of the hybrid mechanism structure of an adjustable laser additive manufacturing powder feeding mechanism for metal parts proposed in the utility model.

[0020] Figure 5 This is a schematic diagram of the grinding component structure of an adjustable laser additive manufacturing powder feeding mechanism for metal parts proposed in the utility model.

[0021] Figure 6 This is a schematic cross-sectional structure diagram of a powder feeding mechanism for an adjustable laser additive manufacturing powder feeding mechanism for metal parts proposed in the utility model.

[0022] Figure 7 This is a schematic structural diagram of the unloading component of an adjustable laser additive manufacturing powder feeding mechanism for metal parts proposed in the utility model.

[0023] In the figure: 1. Metal powder cylinder; 101. Cylinder body; 102. Cylinder cover; 103. Feed hopper; 104. Discharge pipe; 2. Mixing mechanism; 201. Mounting frame; 202. Mixing motor; 203. Mounting shaft; 204. Scraper; 3. Grinding assembly; 301. Filter plate; 302. Grinding block; 4. Powder feeding mechanism; 401. Connecting pipe; 402. Mounting pipe; 403. Powder feeding cylinder; 404. Air inlet pipe; 5. Discharge assembly; 501. Fixing frame; 502. Discharge motor; 503. Connecting shaft; 504. Discharge plate. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0025] Example 1, with reference to Figure 1-5 , an adjustable laser additive manufacturing powder feeding mechanism for metal parts, including a metal powder barrel 1 arranged on the top of the laser additive manufacturing equipment, the metal powder barrel 1 includes a barrel 101 and a barrel cover 102 connected to the outer wall of the top of the barrel 101 by bolts, a feed hopper 103 is fixed on the inner wall of the bottom of the barrel cover 102, and a discharge pipe 104 is fixed on the inner wall of the bottom of the barrel 101. The inner walls of the barrel 101, the feed hopper 103 and the discharge pipe 104 are all sprayed with a polytetrafluoroethylene coating. A mixing mechanism 2 is provided in the barrel 101, and the mixing mechanism 2 includes a mixing motor 202, a mounting shaft 203 connected to the bottom end of the output shaft of the mixing motor 202 through a coupling, and a plurality of shafts respectively abutting the barrel 10 1. A mounting frame 201 is fixed on the top outer wall of the cylinder cover 102. The mixing motor 202 is connected to the top outer wall of the mounting frame 201 by bolts. Several scrapers 204 are respectively fixed on the outer wall of the mounting shaft 203. A grinding assembly 3 is provided in the cylinder 101. The grinding assembly 3 includes a filter plate 301 connected to the upper inner wall of the cylinder 101 by bolts and a grinding block 302 fixed on the upper outer wall of the mounting shaft 203. The filter plate 301 is truncated cone-shaped. The grinding block 302 abuts against the top outer wall of the filter plate 301. The top of the filter plate 301 and the bottom outer wall of the grinding block 302 are both uneven, so as to grind and crush the agglomerated metal powder.

[0026] Example 2, reference Figure 6-7, an adjustable laser additive manufacturing powder feeding mechanism for metal parts, also includes a powder feeding mechanism 4, the powder feeding mechanism 4 includes a mounting tube 402 and a powder feeding cylinder 403 fixed on the outer wall of the bottom end of the mounting tube 402, the outer wall of the bottom end of the discharge pipe 104 is connected to a connecting pipe 401 through a flange, the mounting tube 402 is fixed on the outer wall of the bottom end of the connecting pipe 401, an air inlet pipe 404 is fixed on the inner wall of one side of the powder feeding cylinder 403, one end of the air inlet pipe 404 is connected to an external air source (blower, not shown in the figure), and one end of the powder feeding cylinder 403 is connected to the laser gun of the laser additive equipment through a bellows The two ends of the discharging head are connected, and a discharging assembly 5 is provided in the mounting tube 402. The discharging assembly 5 includes a discharging motor 502, a connecting shaft 503 connected to one end of the output shaft of the discharging motor 502 through a coupling, and a plurality of discharging plates 504 respectively fixed on the outer wall of the connecting shaft 503. A fixing frame 501 is fixed on the outer wall of one side of the mounting tube 402, the discharging motor 502 is connected to the outer wall of one side of the fixing frame 501 by bolts, one end of the connecting shaft 503 is connected to the inner wall of one side of the mounting tube 402 through a bearing, and a plurality of discharging plates 504 respectively abut against the inner wall of the mounting tube 402.

[0027] Working principle: The output shaft of the mixing motor 202 rotates to drive the installation shaft 203, the grinding block 302 and several scrapers 204 to rotate. The scraper 204 rotates along the inner wall of the cylinder 101, thereby scraping off the metal powder attached to the inner wall of the cylinder 101. At the same time, the scraper 204 stirs and mixes the metal powder in the cylinder 101. The grinding block 302 rotates along the surface of the filter plate 301, thereby grinding and crushing the agglomerated metal powder. The output shaft of the unloading motor 502 rotates to drive several unloading plates 504 to rotate. The unloading plates 504 transport the metal powder that falls from the cylinder 101 into the installation tube 402, and transport the metal powder into the powder feeding tube 403. The air inlet pipe 404 is connected to an external air source, and the external air source transports the metal powder in the powder feeding tube 403 into the laser additive gun head. The metal powder delivery amount can be adjusted by adjusting the speed of the output shaft of the unloading motor 502.

[0028] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An adjustable laser additive manufacturing powder feeding mechanism for metal parts, comprising a metal powder barrel (1) arranged on the top of a laser additive manufacturing device, characterized in that: The metal powder cylinder (1) comprises a cylinder (101) and a cylinder cover (102) connected to the top outer wall of the cylinder (101) by bolts; A mixing mechanism (2) is provided in the cylinder (101), and the mixing mechanism (2) comprises a mixing motor (202), a mounting shaft (203) connected to the bottom end of the output shaft of the mixing motor (202) via a coupling, and a plurality of scrapers (204) respectively abutting against the inner wall of the cylinder (101); A grinding assembly (3) is provided in the cylinder (101), and the grinding assembly (3) comprises a filter plate (301) connected to the upper inner wall of the cylinder (101) by bolts, and a grinding block (302) fixed to the upper outer wall of the mounting shaft (203); A powder feeding mechanism (4) is provided below the cylinder (101), and the powder feeding mechanism (4) comprises a mounting tube (402) and a powder feeding tube (403) fixed on the outer wall of the bottom end of the mounting tube (402); A discharge assembly (5) is provided in the mounting tube (402), and the discharge assembly (5) comprises a discharge motor (502), a connecting shaft (503) connected to one end of an output shaft of the discharge motor (502) via a coupling, and a plurality of discharge plates (504) respectively fixed on the outer wall of the connecting shaft (503).

2. The adjustable laser additive manufacturing powder feeding mechanism for metal parts according to claim 1, characterized in that: A feed hopper (103) is fixedly provided on the inner wall of the bottom of the cylinder cover (102), and a discharge pipe (104) is fixedly provided on the inner wall of the bottom of the cylinder body (101).

3. The adjustable laser additive manufacturing powder feeding mechanism for metal parts according to claim 1, characterized in that: A mounting frame (201) is fixedly provided on the top outer wall of the cylinder cover (102), and the hybrid motor (202) is connected to the top outer wall of the mounting frame (201) via bolts. A plurality of scrapers (204) are respectively fixedly provided on the outer wall of the mounting shaft (203).

4. The adjustable laser additive manufacturing powder feeding mechanism for metal parts according to claim 1, characterized in that: The filter plate (301) is in a truncated cone shape, and the grinding block (302) abuts against the top outer wall of the filter plate (301).

5. The adjustable laser additive manufacturing powder feeding mechanism for metal parts according to claim 2, characterized in that: A connecting pipe (401) is connected to the outer wall of the bottom end of the discharge pipe (104) via a flange, and a mounting pipe (402) is fixedly arranged on the outer wall of the bottom end of the connecting pipe (401). An air inlet pipe (404) is fixedly arranged on the inner wall of one side of the powder delivery cylinder (403).

6. The adjustable laser additive manufacturing powder feeding mechanism for metal parts according to claim 1, characterized in that: A fixing frame (501) is fixed on the outer wall of one side of the mounting tube (402), and the unloading motor (502) is connected to the outer wall of one side of the fixing frame (501) by bolts. One end of the connecting shaft (503) is connected to the inner wall of one side of the mounting tube (402) by a bearing, and a plurality of unloading plates (504) are respectively in contact with the inner wall of the mounting tube (402).

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