Powder preheating equipment for metal additive manufacturing

Abstract

The utility model belongs to the technical field of additive manufacturing, and particularly relates to powder preheating equipment for metal additive manufacturing, which comprises a processing barrel with a swinging function and a base, the upper end of the base is rotatably connected with the upper end of the processing barrel through a rotating shaft, a heat conduction mechanism is mounted on the inner wall of the processing barrel and comprises a friction ring, and the friction ring is arranged on the base. The multiple friction rings are distributed on the inner wall of the treatment barrel in a linear array mode. According to the powder preheating equipment for metal additive manufacturing, the heat conduction mechanism is arranged in the treatment barrel, friction between a friction ring in the heat conduction mechanism and the inner wall of the treatment barrel is utilized, and the friction ring is close to the heating pipe, so that when the friction ring is heated, heat is transferred to a temperature conduction piece through a supporting rod and a connecting plate; the stirring blades heat raw material powder through the temperature conduction pieces, and through lap joint between the cleaning blocks and the heating pipe, the cleaning blocks clean the surface of the heating pipe, and meanwhile, the friction rings and the stirring blades are supported in an auxiliary mode.

Description

Technical Field

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

[0002] A powder preheating device for metal additive manufacturing disclosed on a Chinese patent website (publication number: CN218574989U) solves the problem that the traditional preheating device has a complex structure and is cumbersome to use, which affects the preheating efficiency of the powder. At the same time, due to the existing preheating device structure, it is inconvenient to take out the preheated powder, which affects its technical problems. However, the following problems still exist:

[0003] In actual use, in order to stir a large amount of powdered raw materials, the stirring blades are required to have a certain strength and thickness, which makes it difficult to transfer heat on the surface of the stirring blades, and it is not convenient to heat the powdered raw materials remaining on the surface of the stirring blades. At the same time, the surface of the heating tube is also prone to adhere to the powdered raw materials, which affects the use of the heating tube, making it inconvenient to use. Utility Model Content

[0004] Based on the technical problem that the existing preheating equipment is not convenient for preheating the powder for metal additive manufacturing, the utility model proposes a powder preheating equipment for metal additive manufacturing.

[0005] The utility model proposes a powder preheating device for metal additive manufacturing, comprising a processing barrel with a swinging function and a base, the upper end of the base is rotatably connected to the upper end of the processing barrel through a rotating shaft, the inner wall of the processing barrel is installed with a heat conduction mechanism, the heat conduction mechanism comprises a friction ring, a plurality of the friction rings are distributed in a linear array on the inner wall of the processing barrel, a side wall surface of the friction ring is provided with heat conduction holes, the plurality of the heat conduction holes are distributed in a circular array on the surface of the friction ring with the axis of the friction ring as the center of the array, and the opening of the heat conduction hole can also be arranged to be inclined downward, thereby facilitating the avoidance of accumulation of powder raw materials in the heat conduction hole.

[0006] Preferably, the inner wall of the upper end of the processing barrel is rotatably connected to a rotating shaft via a bearing, a stirring blade is fixedly connected to the surface of the rotating shaft, the stirring blade is spiral-shaped, and a heat conducting plate is fixedly inserted on the upper surface of the stirring blade.

[0007] Through the above technical solution, a plurality of heat transfer plates are installed on the surface of the stirring blade, thereby facilitating heat transfer to the powder on the surface of the stirring blade through the heat transfer plates.

[0008] Preferably, a connecting plate is fixedly connected to the lower surface of the stirring blade, the connecting plate is spiral, the upper surface of the connecting plate contacts the lower surface of the thermal conductive plate, the lower surface of the connecting plate is fixedly connected to a support rod, and the friction ring, support rod, connecting plate and thermal conductive plate are all made of steel.

[0009] Through the above technical solution, a plurality of heat transfer plates are connected by using a connecting plate, so that heat is transferred to the plurality of heat transfer plates and the stirring blades are supported at the same time.

[0010] Preferably, the end of the support rod is fixedly connected to the inner wall surface of the friction ring, the outer wall surface of the friction ring contacts the inner wall of the processing barrel, and a cleaning block is fixedly connected to the surface adjacent to the friction ring, and the cleaning block is semicircular.

[0011] Through the above technical solution, the cleaning block is used to assist in connecting adjacent friction rings, thereby facilitating the friction rings to be connected firmly.

[0012] Preferably, a heating tube is installed on the inner wall of the processing barrel, the heating tube is in a circular ring shape, and the surface of the heating tube is slidably connected to the inner wall of the cleaning block.

[0013] Through the above technical solution, the cleaning block is slid on the surface of the heating tube, thereby facilitating the scraping of impurities on the surface of the heating tube. Cleaning cotton and other structures can also be installed on the inner wall of the cleaning block to improve the cleaning efficiency of the surface of the heating tube.

[0014] Preferably, a driving motor is installed on the upper surface of the processing barrel, and the output shaft of the driving motor is fixedly connected to the upper end of the rotating shaft.

[0015] Through the above technical solution, the driving motor is used to provide power for the rotation of the rotating shaft, thereby facilitating the rotating shaft and its surface structure to rotate in the processing barrel.

[0016] The beneficial effects of the present invention are:

[0017] A heat-conducting mechanism is installed in the processing barrel, and the friction ring in the heat-conducting mechanism is rubbed against the inner wall of the processing barrel and is close to the heating tube, so that the friction ring is heated and the heat is transferred to the heat-conducting plate through the support rod and the connecting plate, so that the stirring blade heats the raw material powder through the heat-conducting plate, and through the overlap between the cleaning block and the heating tube, the cleaning block can assist in supporting the friction ring and the stirring blade while cleaning the surface of the heating tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of a powder preheating device for metal additive manufacturing proposed by the utility model;

[0019] Figure 2 A three-dimensional diagram of the friction ring structure of a powder preheating device for metal additive manufacturing proposed by the utility model;

[0020] Figure 3 A three-dimensional diagram of a stirring blade mechanism of a powder preheating device for metal additive manufacturing proposed by the utility model;

[0021] Figure 4 A three-dimensional diagram of the connecting plate structure of a powder preheating device for metal additive manufacturing proposed by the utility model;

[0022] Figure 5 This is a cross-sectional view of the processing barrel structure of a powder preheating device for metal additive manufacturing proposed by the utility model.

[0023] In the figure: 1. treatment barrel; 2. base; 3. friction ring; 31. rotating shaft; 32. stirring blade; 33. temperature conduction plate; 34. connecting plate; 35. support rod; 36. cleaning block; 4. heating tube; 5. driving motor. 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 of the embodiments.

[0025] Reference Figure 1-Figure 5 A powder preheating device for metal additive manufacturing comprises a processing barrel 1 with a swinging function and a base 2. The upper end of the base 2 is rotatably connected to the upper end of the processing barrel 1 through a rotating shaft. A heat conduction mechanism is installed on the inner wall of the processing barrel 1. The heat conduction mechanism comprises a friction ring 3. A plurality of friction rings 3 are distributed in a linear array on the inner wall of the processing barrel 1. A heat conduction hole is opened on the side wall surface of the friction ring 3. The plurality of heat conduction holes are distributed in a ring array on the surface of the friction ring 3 with the axis of the friction ring 3 as the array center. The opening of the heat conduction hole can also be set to be inclined downward, so as to avoid the accumulation of powder raw materials in the heat conduction hole.

[0026] In order to conduct heat to the powder raw material, a rotating shaft 31 is rotatably connected to the inner wall of the upper end of the processing barrel 1 through a bearing, and a stirring blade 32 is fixedly connected to the surface of the rotating shaft 31. The stirring blade 32 is spiral-shaped, and a thermal conductive sheet 33 is fixedly inserted on the upper surface of the stirring blade 32. A plurality of thermal conductive sheets 33 are installed on the surface of the stirring blade 32, so that the thermal conductive sheets 33 are used to conduct heat to the powder on the surface of the stirring blade 32. A connecting plate 34 is fixedly connected to the lower surface of the stirring blade 32. The connecting plate 34 is spiral-shaped, and the upper surface of the connecting plate 34 contacts the lower surface of the thermal conductive sheet 33. A supporting rod 35 is fixedly connected to the lower surface of the connecting plate 34. The friction ring 3, the supporting rod 35, the connecting plate 34 and the thermal conductive sheet 33 are all made of steel. The connecting plate 34 is used to connect the plurality of thermal conductive sheets 33, so that the stirring blade 32 can be supported while transferring heat to the plurality of thermal conductive sheets 33.

[0027] In order to clean and maintain the surface of the heating tube 4, the end of the support rod 35 is fixedly connected to the inner wall surface of the friction ring 3, the outer wall surface of the friction ring 3 contacts the inner wall of the processing barrel 1, and the surface of the adjacent friction ring 3 is fixedly connected with a cleaning block 36, the cleaning block 36 is in a semicircular ring shape, and the cleaning block 36 is used to assist in connecting the adjacent friction rings 3, so that the friction rings 3 are firmly connected, and the inner wall of the processing barrel 1 is installed with a heating tube 4, the heating tube 4 is in a circular ring shape, the surface of the heating tube 4 is slidably connected to the inner wall of the cleaning block 36, and the cleaning block 36 is used to slide on the surface of the heating tube 4, so as to facilitate scraping off impurities on the surface of the heating tube 4, and cleaning cotton and other structures can also be installed on the inner wall of the cleaning block 36, so as to improve the cleaning efficiency of the surface of the heating tube 4.

[0028] By installing a heat-conducting mechanism in the processing barrel 1, the friction ring 3 in the heat-conducting mechanism is rubbed against the inner wall of the processing barrel 1 and is close to the heating tube 4, so that the friction ring 3 is heated and the heat is transferred to the heat-conducting plate 33 through the support rod 35 and the connecting plate 34, so that the stirring blade 32 heats the raw material powder through the heat-conducting plate 33, and through the overlap between the cleaning block 36 and the heating tube 4, the cleaning block 36 can clean the surface of the heating tube 4 while providing auxiliary support to the friction ring 3 and the stirring blade 32.

[0029] A drive motor 5 is installed on the upper surface of the processing barrel 1, and the output shaft of the drive motor 5 is fixedly connected to the upper end of the rotating shaft 31. The drive motor 5 provides power for the rotation of the rotating shaft 31, thereby driving the rotating shaft 31 and its surface structure to rotate in the processing barrel 1.

[0030] Working principle:

[0031] When in use, the outlet at the lower end of the processing barrel 1 is closed, and the powder raw material is injected into the processing barrel 1, and the heating tube 4 and the driving motor 5 are started. The driving motor 5 drives the stirring blade 32 to rotate through the rotating shaft 31, and the stirring blade 32 lifts the powder raw material. At the same time, the friction ring 3 rubs against the inner wall of the processing barrel 1, and the heating tube 4 transfers heat to the friction ring 3. The friction ring 3 transfers heat to the surface of the heat transfer plate 33 through the support rod 35 and the connecting plate 34, and the heat transfer plate 33 heats the powder raw material on the surface of the stirring blade 32;

[0032] When the friction ring 3 rotates, it drives the cleaning block 36 to slide on the surface of the heating tube 4 and scrapes off the powder material adhered to the surface of the heating tube 4.

[0033] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A powder preheating device for metal additive manufacturing, comprising a processing barrel (1) with a swinging function and a base (2), wherein the upper end of the base (2) is rotatably connected to the upper end of the processing barrel (1) via a rotating shaft, characterized in that: The inner wall of the processing barrel (1) is provided with a heat conduction mechanism, the heat conduction mechanism comprising a friction ring (3), a plurality of the friction rings (3) are distributed in a linear array on the inner wall of the processing barrel (1), a heat conduction hole is opened on the side wall surface of the friction ring (3), and the plurality of the heat conduction holes are distributed in a ring array on the surface of the friction ring (3) with the axis of the friction ring (3) as the center of the array.

2. A powder preheating device for metal additive manufacturing according to claim 1, characterized in that: The inner wall of the upper end of the processing barrel (1) is rotatably connected to a rotating shaft (31) via a bearing, a stirring blade (32) is fixedly connected to the surface of the rotating shaft (31), the stirring blade (32) is spiral-shaped, and a heat conducting plate (33) is fixedly inserted on the upper surface of the stirring blade (32).

3. A powder preheating device for metal additive manufacturing according to claim 2, characterized in that: A connecting plate (34) is fixedly connected to the lower surface of the stirring blade (32); the connecting plate (34) is spiral-shaped; the upper surface of the connecting plate (34) contacts the lower surface of the thermal conductive plate (33); a supporting rod (35) is fixedly connected to the lower surface of the connecting plate (34); and the friction ring (3), the supporting rod (35), the connecting plate (34) and the thermal conductive plate (33) are all made of steel.

4. The powder preheating device for metal additive manufacturing according to claim 3, characterized in that: The end of the support rod (35) is fixedly connected to the inner wall surface of the friction ring (3), the outer wall surface of the friction ring (3) contacts the inner wall of the processing barrel (1), and a cleaning block (36) is fixedly connected to the surface adjacent to the friction ring (3), and the cleaning block (36) is in the shape of a semicircular ring.

5. The powder preheating device for metal additive manufacturing according to claim 4, characterized in that: A heating tube (4) is installed on the inner wall of the processing barrel (1); the heating tube (4) is in a circular ring shape; the surface of the heating tube (4) is slidably connected to the inner wall of the cleaning block (36).

6. The powder preheating device for metal additive manufacturing according to claim 2, characterized in that: A driving motor (5) is installed on the upper surface of the processing barrel (1), and the output shaft of the driving motor (5) is fixedly connected to the upper end of the rotating shaft (31).

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