Sampling device for metal powder for additive manufacturing

Abstract

The utility model relates to the technical field of additive manufacturing, in particular to a sampling device for metal powder for additive manufacturing, which comprises a device shell, a storage cavity is arranged in the device shell, the outer wall of the device shell is communicated with a connecting pipe, the tail end of the connecting pipe is connected with a negative pressure pump fixedly connected with the device shell, and the negative pressure pump is connected with a negative pressure pump. And a first electromagnetic valve is mounted on the outer surface of the connecting pipe, and the lower end of the device shell communicates with a mounting pipe. According to the device, air in the storage cavity can be pumped out through the negative pressure pump on the device shell under the cooperation of the connecting pipe, so that the storage cavity forms a negative pressure cavity, the first electromagnetic valve is closed, external air is prevented from entering the storage cavity, and the second electromagnetic valve is opened; external air can quickly enter the storage cavity through the mounting pipe, so that the metal powder is sucked into the storage cavity for sampling, manual operation is not needed, damage of the powder to workers is avoided, and the practicability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of additive manufacturing, in particular to a sampling device for metal powder used in additive manufacturing. Background Art

[0002] Due to the different metal powder forming processes and subsequent application requirements, there are great differences in the preparation methods. According to the preparation principle, there are mainly two types: physical and chemical methods and mechanical methods. The spherical powder is prepared by this atomizer. The wire or rod is heated by the high-temperature flame flow outside the nozzle of multiple plasma torches to melt it into a liquid flow or larger droplets. The liquid flow or droplets are atomized into smaller droplets through the high-pressure annular nozzle; the small droplets become spherical under the action of surface tension; after the small droplets enter the atomization chamber, they are cooled and solidified into spherical powder.

[0003] The patent specification with the announcement number CN209214983U discloses a sampling device for carbonyl metal powder products, which includes a total nitrogen pipeline, a sampling nitrogen delivery pipeline, a total exhaust pipeline, a sampling exhaust pipeline, a sampling nitrogen intake valve, a sampling nitrogen exhaust valve, and a material bin. A stirring mechanism is arranged inside the material bin, a total exhaust pipeline is arranged on the top of the material bin, the total exhaust pipeline is connected to the tail gas recovery equipment, one side of the conical cylinder at the bottom of the material bin is connected to the total nitrogen pipeline, the other side of the conical cylinder at the bottom of the material bin is connected to the sampling mechanism, one end of the sampling nitrogen delivery pipeline is connected to the total nitrogen pipeline, and the other end of the sampling nitrogen delivery pipeline is connected to the sampling mechanism through the sampling nitrogen intake valve. It ensures the patency of powder collection by combining gravity and mechanical movement, thereby saving products, eliminating dangers, preventing the sampled powder from mixing, making sampling more accurate, saving expenses and improving product quality.

[0004] However, in the implementation of relevant technologies, it was found that the sampling device of a carbonyl metal powder product designed as above has the following problems: the above technical solution ensures the smoothness of powder collection by combining gravity and mechanical movement, thereby saving products, eliminating dangers, preventing mixing of sampled powders, making sampling more accurate, saving costs and improving product quality. However, it needs to be operated manually during use, and the produced powder can easily cause damage to the health of the staff, which is not conducive to use. In view of this, a sampling device for metal powder for additive manufacturing is provided to overcome the above defects. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a sampling device for metal powder used in additive manufacturing.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a sampling device for metal powder for additive manufacturing, comprising a device shell, a storage cavity is opened inside the device shell, the outer wall of the device shell is connected to a connecting pipe, the end of the connecting pipe is connected to a negative pressure pump fixedly connected to the device shell, a first solenoid valve is installed on the outer surface of the connecting pipe, the lower end of the device shell is connected to a mounting pipe, a second solenoid valve is installed on the outer surface of the mounting pipe, and a fixing frame is fixed to the upper surface of the device shell.

[0007] As a further description of the above technical solution: a driving electric cylinder is fixed to the upper end of the device shell by bolts, and the telescopic end of the driving electric cylinder passes through the device shell and is connected to a push plate, and the outer wall of the push plate is tightly fitted with the inner wall of the device shell. The driving electric cylinder is arranged to drive the push plate to move vertically, so that the metal powder in the storage chamber can be pushed out.

[0008] As a further description of the above technical solution: an adjusting electric cylinder is installed on the upper surface of the fixing frame, and a movable part is fixed to the upper end of the adjusting electric cylinder by bolts. The adjusting electric cylinder drives the fixing frame to move vertically, so that the mounting tube is inserted into the metal powder storage box for easy adjustment.

[0009] As a further description of the above technical solution: the movable part is internally connected with a cross frame, and both ends of the cross frame are fixed with fixed plates. Through the provision of the cross frame, the device can be easily fixed under the action of the fixed plate.

[0010] As a further description of the above technical solution: two guide grooves are provided on the outer wall of the cross frame, and sliders fixedly connected to the movable parts are slidably connected to the inside of the two guide grooves. The guide grooves arranged on the cross frame play a guiding role under the action of the sliders to avoid displacement of the movable parts during movement.

[0011] As a further description of the above technical solution: a travel motor is fixed to the inside of the movable part by bolts, and a power output shaft of the travel motor is connected to a gear. The set travel motor drives the gear to rotate, thereby driving the movable part to move horizontally, which is convenient for adjusting the horizontal position of the device casing.

[0012] As a further description of the above technical solution: a rack is meshed on the upper surface of the gear, and the rack is fixedly connected to the cross frame. The gear meshes with the rack. Since the rack and the cross frame are fixedly connected, the movable part can slide horizontally on the cross frame, so as to facilitate sampling of metal powder at different positions.

[0013] The utility model has the following beneficial effects:

[0014] The utility model designs a sampling device for metal powder used in additive manufacturing. Through the negative pressure pump on the device shell, with the cooperation of the connecting pipe, the air in the storage chamber can be extracted to form a negative pressure chamber in the storage chamber. The first solenoid valve is closed to prevent external gas from entering the storage chamber. The second solenoid valve is opened to allow external air to quickly enter the storage chamber through the installation pipe, thereby sucking the metal powder into the interior for sampling. No manual operation is required, thus preventing the powder from causing harm to the staff and improving practicality. The metal powder in the storage chamber can be pushed out by driving the push plate to move vertically through the driving electric cylinder.

[0015] The utility model designs a sampling device for metal powder used in additive manufacturing. An adjusting electric cylinder drives a fixing frame to move vertically, so that a mounting tube is inserted into a storage box for metal powder, which is convenient for adjustment. A travel motor is provided to drive a gear to rotate, thereby driving a movable part to move horizontally, which is convenient for adjusting the horizontal position of a device housing. The gear meshes with a rack. Since the rack and a cross frame are fixedly connected, the movable part can slide horizontally on the cross frame, so as to facilitate sampling of metal powder at different positions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0017] Figure 2 It is a three-dimensional structural schematic diagram of the housing of the device of the utility model;

[0018] Figure 3 It is a schematic diagram of the cross-sectional structure of the housing of the device of the utility model;

[0019] Figure 4 It is a schematic diagram of the cross-sectional structure of the movable part of the utility model.

[0020] Legend:

[0021] 1. Device housing; 2. Storage chamber; 3. Connecting pipe; 4. Negative pressure pump; 5. First solenoid valve; 6. Mounting pipe; 7. Second solenoid valve; 8. Fixed frame; 9. Driving electric cylinder; 10. Pushing plate; 11. Adjusting electric cylinder; 12. Moving parts; 13. Cross frame; 14. Fixed plate; 15. Guide groove; 16. Slider; 17. Travel motor; 18. Gear; 19. Rack. DETAILED DESCRIPTION

[0022] Reference Figure 1-Figure 4The utility model provides a sampling device for metal powder for additive manufacturing: it comprises a device shell 1, a storage chamber 2 is opened inside the device shell 1, the outer wall of the device shell 1 is connected with a connecting pipe 3, the end of the connecting pipe 3 is connected with a negative pressure pump 4 fixedly connected to the device shell 1, a first electromagnetic valve 5 is installed on the outer surface of the connecting pipe 3, the lower end of the device shell 1 is connected with a mounting pipe 6, the outer surface of the mounting pipe 6 is installed with a second electromagnetic valve 7, and the upper surface of the device shell 1 is fixed with a fixing frame 8. Through the negative pressure pump 4 on the device shell 1, with the cooperation of the connecting pipe 3, the air in the storage chamber 2 can be extracted to form a negative pressure chamber in the storage chamber 2, the first electromagnetic valve 5 is closed to prevent external gas from entering the storage chamber 2, and the second electromagnetic valve 7 is opened to allow external air to quickly enter the storage chamber 2 through the mounting pipe 6, thereby sucking the metal powder into the interior for sampling, without manual operation, avoiding the powder from causing harm to the staff, and improving practicality.

[0023] As a further implementation scheme of the above technical scheme: a driving electric cylinder 9 is fixed to the upper end of the device housing 1 by bolts, and the telescopic end of the driving electric cylinder 9 passes through the device housing 1 and is connected to a push plate 10, and the outer wall of the push plate 10 is tightly fitted with the inner wall of the device housing 1. The driving electric cylinder 9 is arranged to drive the push plate 10 to move vertically, so that the metal powder in the storage chamber 2 can be pushed out.

[0024] As a further implementation scheme of the above technical scheme: an adjusting electric cylinder 11 is installed on the upper surface of the fixing frame 8, and a movable part 12 is fixed to the upper end of the adjusting electric cylinder 11 by bolts. The adjusting electric cylinder 11 drives the fixing frame 8 to move vertically, so that the mounting tube 6 is inserted into the storage box of the metal powder for easy adjustment.

[0025] As a further implementation scheme of the above technical scheme: the movable part 12 is internally connected with a cross frame 13, and both ends of the cross frame 13 are fixed with fixing plates 14. Through the setting of the cross frame 13, under the action of the fixing plates 14, the device can be easily fixed.

[0026] In specific implementation, before using the sampling device for metal powder for additive manufacturing, the device is first installed in a suitable position. When in use, the air in the storage chamber 2 can be extracted through the negative pressure pump 4 on the device housing 1, with the cooperation of the connecting pipe 3, so that the storage chamber 2 forms a negative pressure chamber, and then the first solenoid valve 5 is closed to prevent external gas from entering the storage chamber 2. When sampling, the adjusting electric cylinder 11 drives the fixing frame 8 to move vertically, so that the mounting tube 6 is inserted into the storage box of the metal powder, and the second solenoid valve 7 is opened, so that the external air can quickly enter the storage chamber 2 through the mounting tube 6, thereby sucking the metal powder into the interior for sampling. After sampling, the second solenoid valve 7 is closed to prevent leakage of the metal powder. The driving electric cylinder 9 drives the push plate 10 to move vertically, so that the metal powder in the storage chamber 2 can be pushed out for detection and use. No manual operation is required, which avoids the powder from causing harm to the staff and improves practicality.

[0027] As a further implementation scheme of the above technical scheme: two guide grooves 15 are provided on the outer wall of the cross frame 13, and sliders 16 fixedly connected to the movable part 12 are slidably connected to the inside of the two guide grooves 15. The guide grooves 15 arranged on the cross frame 13 play a guiding role under the action of the sliders 16, thereby preventing the movable part 12 from deflecting when moving.

[0028] As a further implementation scheme of the above technical scheme: a travel motor 17 is fixed to the inside of the movable part 12 by bolts, and the power output shaft of the travel motor 17 is connected to a gear 18. The set travel motor 17 drives the gear 18 to rotate, thereby driving the movable part 12 to move horizontally, which is convenient for adjusting the horizontal position of the device housing 1.

[0029] As a further implementation scheme of the above technical scheme: the upper surface of the gear 18 is meshed with a rack 19, and the rack 19 is fixedly connected to the cross frame 13. The gear 18 meshes with the rack 19. Since the rack 19 and the cross frame 13 are fixedly connected, the movable part 12 can slide horizontally on the cross frame 13, so as to facilitate sampling of metal powder at different positions.

[0030] During specific implementation, bolts can be used to fix the fixed plate 14 on the cross frame 13, and the travel motor 17 in the movable part 12 can drive the gear 18 to rotate, so that the gear 18 engages with the rack 19. Since the rack 19 and the cross frame 13 are fixedly connected, with the cooperation of the guide groove 15 and the slider 16, the movable part 12 can slide horizontally on the cross frame 13, thereby adjusting the horizontal position of the device housing 1, which is convenient for sampling metal powder at different positions.

[0031] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sampling device for metal powder for additive manufacturing, comprising a device housing (1), wherein a storage chamber (2) is provided inside the device housing (1), and characterized in that: The outer wall of the device housing (1) is connected to a connecting pipe (3), the end of the connecting pipe (3) is connected to a negative pressure pump (4) fixedly connected to the device housing (1), the outer surface of the connecting pipe (3) is installed with a first solenoid valve (5), the lower end of the device housing (1) is connected to a mounting pipe (6), the outer surface of the mounting pipe (6) is installed with a second solenoid valve (7), and the upper surface of the device housing (1) is fixed with a fixing frame (8).

2. A sampling device for metal powder for additive manufacturing according to claim 1, characterized in that: A driving electric cylinder (9) is fixed to the upper end of the device housing (1) by means of bolts, and the telescopic end of the driving electric cylinder (9) penetrates the device housing (1) and is connected to a push plate (10), and the outer wall of the push plate (10) is tightly fitted to the inner wall of the device housing (1).

3. A sampling device for metal powder for additive manufacturing according to claim 1, characterized in that: An adjusting electric cylinder (11) is installed on the upper surface of the fixing frame (8), and a movable part (12) is fixed to the upper end of the adjusting electric cylinder (11) by means of bolts.

4. A sampling device for metal powder for additive manufacturing according to claim 3, characterized in that: The movable part (12) is internally connected with a cross frame (13), and both ends of the cross frame (13) are fixed with fixing plates (14).

5. A sampling device for metal powder for additive manufacturing according to claim 4, characterized in that: The outer wall of the cross frame (13) is provided with two guide grooves (15), and the insides of the two guide grooves (15) are slidably connected with a sliding block (16) fixedly connected to the movable part (12).

6. A sampling device for metal powder for additive manufacturing according to claim 5, characterized in that: A travel motor (17) is fixed inside the movable part (12) by means of bolts, and a power output shaft of the travel motor (17) is connected to a gear (18).

7. A sampling device for metal powder for additive manufacturing according to claim 6, characterized in that: The upper surface of the gear (18) is meshed with a rack (19), and the rack (19) is fixedly connected to the cross frame (13).

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