Device for automatically separating special-shaped powder from spherical powder

Abstract

The invention discloses a device for automatically separating special-shaped powder from spherical powder, and relates to the technical field of powder separation. The device comprises a feeding bin with one end provided with a first discharging port and a variable-angle inclined multi-stage slide way set. The variable-angle inclined multi-stage slide way group comprises an acceleration section slide way connected with an outlet of the feeding bin, a retarding section slide way connected with an outlet of the acceleration section slide way, and a recovery section slide way connected with an outlet of the retarding section slide way; a second discharging port with the preset horizontal width is formed in the connector position of the retarding section sliding way and the recycling section sliding way, the position height of an inlet of the recycling section sliding way is lower than that of an outlet of the retarding section sliding way, and the inclination angle of the recycling section sliding way is equal to that of the accelerating section sliding way. The inclination angle of the retarding section sliding way is one third to one half of the inclination angle of the accelerating section sliding way. According to the invention, automatic separation of spherical powder and special-shaped powder with similar weight and size can be realized.

Description

Technical Field

[0001] The invention belongs to the technical field of powder separation, and in particular relates to a device for automatically separating irregular-shaped powder from spherical powder. Background Art

[0002] Spherical powder has high fluidity and bulk density, and is the most important core raw material in the field of additive manufacturing. Its main production processes are various atomization methods and rotating electrode methods. Regardless of the process, due to physical collision, adhesion, and wrapping between powders, there will be flat flake powders, satellite powders with multiple particles adhering, and other special-shaped powders, which will cause defects in the powder during additive manufacturing and seriously damage the performance of additive manufacturing parts. Therefore, it must be removed through screening and separation technology.

[0003] Common separation technologies include screening technology using screens and screening technology using airflow. Screen screening technology mainly uses round hole screens, which are sensitive to large-sized particles and can screen and separate larger-sized irregular powders, but cannot separate irregular powders with a size less than or equal to the aperture. The processing efficiency is very low when using multi-layer screens; airflow screening is sensitive to powder weight and can screen irregular powders with larger or smaller weights. For example, Chinese patent CN112090751A discloses a device for removing flaky powders and inclusions, which combines the principles of round hole screening and airflow separation, and mainly separates spherical powders and flaky powders with large weight differences, but cannot separate irregular powders with similar weight and size to spherical powders. Summary of the invention

[0004] In order to solve the above technical problems, the present invention proposes a device for automatically separating spherical powder from irregular powder. Based on the principle of friction, the device makes full use of the powder's own weight and its own shape characteristics, and realizes the automatic separation of spherical powder and irregular powder with similar weight and size by designing a variable-angle inclined multi-stage slide group.

[0005] The present invention provides a device for automatically separating irregular-shaped powder from spherical powder, the device comprising:

[0006] A feed bin, wherein a feed port is disposed at one end of the feed bin and a first discharge port is disposed at the other end;

[0007] A variable angle inclined multi-stage slideway group, the variable angle inclined multi-stage slideway group comprising an acceleration section slideway connected to the first discharge port, a deceleration section slideway connected to the outlet of the acceleration section slideway, and a recovery section slideway connected to the outlet of the deceleration section slideway;

[0008] A second discharge port with a preset horizontal width is arranged at the interface position of the deceleration section chute and the recovery section chute, the entrance height of the recovery section chute is lower than the exit height of the deceleration section chute, the inclination angle of the recovery section chute is equal to the inclination angle of the acceleration section chute, and the inclination angle of the deceleration section chute is one third to one half of the inclination angle of the acceleration section chute.

[0009] According to the device for automatically separating irregular-shaped powder from spherical powder of the present invention, the horizontal width of the second discharge port is greater than the horizontal width of the free fall of irregular-shaped powder after passing through the acceleration section slide, and is smaller than the horizontal width of the free fall of spherical powder after passing through the acceleration section slide;

[0010] The horizontal width d of the free fall of the irregular powder after passing through the acceleration section slide 异 for:

[0011]

[0012] The horizontal width d of the free fall of the spherical powder after passing through the acceleration section slide 球 for:

[0013]

[0014] Among them, V 异 is the speed of the irregular powder after passing through the acceleration section slide, t 异 is the free fall time of the shaped powder after passing through the acceleration section slide, l is the length of the acceleration section slide, g is the gravity acceleration, α is the inclination angle of the acceleration section slide, μ is the friction coefficient of the acceleration section slide, V 球 is the speed of the spherical powder after passing through the acceleration section slide, t 球 It is the free fall time of spherical powder after passing through the acceleration section slide.

[0015] According to the device for automatically separating irregular-shaped powder from spherical powder of the present invention, the difference between the height of the entrance of the recovery section chute and the height of the exit of the deceleration section chute is greater than the vertical height of the free fall of the spherical powder after passing through the acceleration section chute, and is less than the vertical height of the free fall of the irregular-shaped powder after passing through the acceleration section chute;

[0016] The vertical height of the free fall of the irregular powder after passing through the acceleration section slideway is h 异 for:

[0017]

[0018] The vertical height of the spherical powder falling freely after passing through the acceleration section slideway is h 球 for:

[0019]

[0020] Among them, t 异 is the free fall time of the irregular powder after passing through the acceleration section slide, t 球 It is the free fall time of spherical powder after passing through the acceleration section slide.

[0021] According to the device for automatically separating irregular-shaped powder from spherical powder of the present invention, a first vibrator is arranged on the side of the feed bin, a first guide fin group is arranged at the first discharge port, and a screed plate is arranged between the first guide fin group and the acceleration section slideway.

[0022] According to the device for automatically separating irregular-shaped powder from spherical powder of the present invention, a second guide fin group is provided at the inlet of the acceleration section slideway.

[0023] According to the device for automatically separating irregular-shaped powder from spherical powder of the present invention, the acceleration section slideway and the deceleration section slideway are designed in an integrated manner.

[0024] According to the device for automatically separating irregular-shaped powder from spherical powder of the present invention, the acceleration section slideway and the deceleration section slideway are designed by bevel splicing.

[0025] According to the device for automatically separating irregular-shaped powder from spherical powder of the present invention, a second vibrator is arranged on the back of the slow-speed section slideway.

[0026] According to the device for automatically separating irregular-shaped powder from spherical powder of the present invention, the device further comprises a first powder recovery bin, and the first powder recovery bin is connected to the second discharge port.

[0027] According to the device for automatically separating irregular-shaped powder from spherical powder of the present invention, the device further comprises a second powder recovery bin, and the second powder recovery bin is connected to the outlet of the recovery section slideway.

[0028] The solution proposed by the present invention has the following technical effects:

[0029] The invention is based on the friction principle, fully utilizes the dead weight and shape characteristics of the powder, and realizes the automatic separation of spherical powder and irregular powder with similar weight and size by designing a variable-angle inclined multi-stage slideway group.

[0030] In addition, the present invention provides specific relationships among the horizontal width of the second discharge port, the difference between the position height of the entrance of the recovery section slide and the position height of the exit of the deceleration section slide, the length of the acceleration section slide, the inclination angle of the acceleration section slide, and the friction coefficient of the acceleration section slide.

[0031] In addition, the device of the present invention has a high separation rate for flaky powder, satellite powder and other special-shaped powders, with the residual amount of the first separation being less than 10% and the residual amount of the second separation being less than 3%. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 The present invention is a schematic structural diagram of a device for automatically separating irregular-shaped powder from spherical powder in one embodiment of the present invention.

[0034] Figure 2 yes Figure 1 Schematic diagram of the partial structure of the middle feed bin.

[0035] Figure 3 yes Figure 1 Schematic diagram of the partial structure of a medium-variable-angle inclined multi-stage slideway group.

[0036] Figure 4 The figure is a schematic diagram of force analysis of powder on an acceleration slideway of a device for automatically separating irregular-shaped powder from spherical powder in this embodiment.

[0037] Wherein: 1-support frame, 2-first powder recovery bin, 3-second vibrator, 4-side wall of support frame, 5-slide height adjuster, 6-first discharge port, 7-second guide fin group, 8-side wall of feed bin, 9-first vibrator, 10-side wall of feed bin, 11-feed bin, 12-screed plate, 13-acceleration section slide, 14-slide baffle, 15-sealing cover, 16-deceleration section slide, 17-second discharge port, 18-recovery section slide, 19-recovery section slide outlet, 20-second powder recovery bin, 21-side wall of support frame. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] The abbreviations and key terms in this embodiment are defined as follows:

[0040] Spherical powder: powder that is spherical or nearly spherical in shape.

[0041] Special-shaped powder: Compared with spherical powder, it is a general term for irregular and non-spherical powder, among which the main types are flat flake powder and satellite powder with multiple particles sticking together.

[0042] This embodiment provides a device for automatically separating irregular-shaped powder from spherical powder. Figure 1-Figure 3 The device comprises:

[0043] A feed bin, wherein a feed port is disposed at one end of the feed bin and a first discharge port is disposed at the other end;

[0044] A variable angle inclined multi-stage slideway group, the variable angle inclined multi-stage slideway group comprising an acceleration section slideway connected to the first discharge port, a deceleration section slideway connected to the outlet of the acceleration section slideway, and a recovery section slideway connected to the outlet of the deceleration section slideway;

[0045] A second discharge port with a preset horizontal width is arranged at the interface position of the deceleration section chute and the recovery section chute, the entrance height of the recovery section chute is lower than the exit height of the deceleration section chute, the inclination angle of the recovery section chute is equal to the inclination angle of the acceleration section chute, and the inclination angle of the deceleration section chute is one third to one half of the inclination angle of the acceleration section chute.

[0046] This embodiment is based on the principle of friction and makes full use of the powder's own weight and its own shape characteristics. The powder's own weight and powder fluidity drive the powder to move from top to bottom on the slide; the powder's own shape determines the friction mode. In this embodiment, it is assumed that spherical powder is rolling friction, and flaky or satellite powder is sliding friction. There is a speed difference between powders of different shapes, among which spherical powder moves fast; flaky powder, satellite powder and other special-shaped powders have a low movement speed due to their shape; by controlling the friction coefficient and inclination angle of the variable-angle inclined multi-stage slide group, the speed difference of powders of different shapes is further increased, and the horizontal width of the matching second discharge port and the difference in the position height of the entrance of the recovery section slide and the position height of the exit of the deceleration section slide are set to achieve automatic separation of spherical powder and special-shaped powder with similar weight and size.

[0047] In some embodiments, the horizontal width of the second discharge port is greater than the horizontal width of the free fall of the irregularly shaped powder after passing through the acceleration section chute, and is less than the horizontal width of the free fall of the spherical powder after passing through the acceleration section chute;

[0048] The horizontal width d of the free fall of the irregular powder after passing through the acceleration section slide 异 for:

[0049]

[0050] The horizontal width d of the free fall of the spherical powder after passing through the acceleration section slide 球 for:

[0051]

[0052] Among them, V异 is the speed of the irregular powder after passing through the acceleration section slide, t 异 is the free fall time of the shaped powder after passing through the acceleration section slide, l is the length of the acceleration section slide, g is the gravity acceleration, α is the inclination angle of the acceleration section slide, μ is the friction coefficient of the acceleration section slide, V 球 is the speed of the spherical powder after passing through the acceleration section slide, t 球 It is the free fall time of spherical powder after passing through the acceleration section slide.

[0053] Specifically, Figure 4 As shown in the figure, the shaped powder is in sliding friction, and the thrust F is applied to the shaped powder when it moves in the acceleration section slideway. 异 =m 异 ×g×(sinα-cosα×μ), where m 异 is the mass of the shaped powder; then the actual acceleration a of the shaped powder 异 =g×(sinα-cosα×μ), according to the formula of powder acceleration and distance And the formula of powder speed and acceleration V = at, we can get the speed of the irregular powder after passing through the acceleration section slide

[0054] Spherical powder is subjected to rolling friction, while irregular powder is subjected to friction when moving in the acceleration section slideway. Where k is the rolling friction coefficient, F2 is the positive pressure, and R is the roller radius. -3 —10 -4 level, ignoring the simplified calculation, the thrust F that the spherical powder is subjected to when moving in the acceleration section slideway is obtained. 球 =m 球 ×g×sinα, where m 球 is the mass of the spherical powder; then the actual acceleration a of the spherical powder 球 =g×sinα, according to the formula of powder acceleration and distance And the formula of powder velocity and acceleration V = at, we can get the velocity of spherical powder after passing through the acceleration section slide

[0055] In some embodiments, the difference between the height of the entrance of the recovery section chute and the height of the exit of the deceleration section chute is greater than the vertical height of the free fall of the spherical powder after passing through the acceleration section chute, and is less than the vertical height of the free fall of the irregular powder after passing through the acceleration section chute;

[0056] The vertical height of the free fall of the irregular powder after passing through the acceleration section slideway is h 异 for:

[0057]

[0058] The vertical height of the spherical powder falling freely after passing through the acceleration section slideway is h 球 for:

[0059]

[0060] Among them, t 异 is the free fall time of the irregular powder after passing through the acceleration section slide, t 球 It is the free fall time of spherical powder after passing through the acceleration section slide.

[0061] This embodiment provides the specific relationship between the horizontal width of the second discharge port, the height difference between the entrance of the recovery section chute and the exit of the deceleration section chute, the length of the acceleration section chute, the inclination angle of the acceleration section chute, and the friction coefficient of the acceleration section chute. In practical applications, the length, material (friction coefficient), inclination angle of the acceleration section chute, and the horizontal width of the second discharge port, the height difference between the entrance of the recovery section chute and the exit of the deceleration section chute, and other key parameters can be determined according to the size and type of the powder to be separated, and is suitable for powders of various specifications and types.

[0062] Specifically, the friction coefficient of the powder to be separated relative to the acceleration section slideway can be determined by selecting the material of the variable angle inclined multi-stage slideway group. After that, the length and inclination angle of the acceleration section slideway and the horizontal width of the second discharge port can be determined according to the formula and Calculate the speed of spherical powder and irregular powder after passing through the acceleration section slideway, and further use the formula and The time for spherical powder and irregular powder to fall freely to the same horizontal width after passing through the acceleration section slide can be obtained according to the formula and We can further obtain the vertical height h corresponding to the same horizontal width of spherical powder and irregular powder after free fall through the acceleration section slide 球 and h 异 , in h 球 and h 异 The value between is taken as the difference between the height of the entrance of the recovery section slide and the height of the exit of the deceleration section slide.

[0063] Similarly, the difference between the height of the entrance of the recovery section slide and the height of the exit of the slow-speed section slide is determined according to the formula and The time for spherical powder and irregular powder to fall freely to the same vertical height after passing through the acceleration section slide can be further obtained. The friction coefficient of the powder to be separated relative to the acceleration section slide can be determined by further selecting the material of the variable angle inclined multi-stage slide group. After that, the length and inclination angle of the acceleration section slide can be selected, and the formula and Calculate the speed of spherical powder and irregular powder after passing through the acceleration section slide, and then use the formula and The horizontal width of the spherical powder and the irregular powder corresponding to the same vertical height of free fall after passing through the acceleration section slide is obtained. 球 and d 异 The value between is taken as the horizontal width of the second discharge port.

[0064] In some embodiments, the variable-angle inclined multi-stage slideway assembly is made of inorganic glass, steel, organic glass or polystyrene plastic.

[0065] Table 1 shows the friction coefficient of steel metal powder on the variable-angle inclined multi-stage slideway group of different materials.

[0066] Table 1

[0067] Sliding friction coefficient μ Inorganic glass steel Plexiglas Polystyrene plastic Steel Metal Powder 0.1-0.3 0.1-0.5 0.4-0.5 0.2-0.35

[0068] Specifically, in this embodiment, the material of the variable-angle inclined multi-stage slide group is inorganic glass as an example, and the working surface of the variable-angle inclined multi-stage slide group is subjected to frosting and / or sandblasting, so that the friction coefficient μ of the powder to be separated on the inorganic glass is 0.2, and the inclination angles of the acceleration section slide and the recovery section slide are set to 15°, the inclination angle of the deceleration section slide is 7.5°, and the horizontal width of the second discharge port is 50 mm. Then, according to the above formula, the speed V of the spherical powder and the irregular powder after passing through the acceleration section slide under different acceleration section slide lengths can be obtained. 球 and V 异 The free fall time t of spherical powder and irregular powder after passing through the acceleration section slide 球 and t 异 , the vertical height of the free fall of spherical powder and irregular powder after passing through the acceleration section slide h 球 and h 异 The specific results are shown in Table 2.

[0069] Table 2

[0070]

[0071] Preferably, in this embodiment, the width of the variable-angle inclined multi-stage slide group is 150 mm, the length of the acceleration section slide is 200 mm, the length of the deceleration section slide is 100 mm, the length of the recovery section slide is 120 mm, and the difference between the position height of the entrance of the recovery section slide and the position height of the exit of the deceleration section slide is approximately 20 mm (i.e., greater than the 12.1 mm vertical height of the free fall of spherical powder after passing through the acceleration section slide, and less than the 47.1 mm vertical height of the free fall of irregular powder after passing through the acceleration section slide).

[0072] For metal powders with a particle size of 30-1000 μm or even powders with a larger particle size or the like, the formula of this embodiment can be used for approximate calculation.

[0073] In some embodiments, a first vibrator is disposed on the side of the feed bin, a first guide fin group is disposed at the first discharge port, and a screed plate is disposed between the first guide fin group and the acceleration section slideway.

[0074] In most cases, the fluidity of the powder to be separated is sufficient to ensure the natural flow of the powder to be separated. When the powder to be separated is damp, agglomerated, or otherwise aggregated, the first vibrator can be turned on to ensure the fluidity of the powder to be separated in the variable-angle inclined multi-stage slide group; at the same time, the first guide fin group and the leveling plate both have the ability to break up the powder agglomerates under vibration to prevent channel blockage. The first guide fin group is used to align the flow direction of the powder to be separated. The leveling plate is used to scrape the powder to be separated into a single layer, and the leveling plate can be adjusted to accommodate powders of different specifications. The rectified and leveled powder to be separated is separated when it enters the variable-angle inclined multi-stage slide group.

[0075] Preferably, the inclination angle of the feed bin is 40-60° to ensure that the powder to be separated flows downward under its own weight into the variable-angle inclined multi-stage slideway group.

[0076] Preferably, the outlet of the feed bin is a funnel structure.

[0077] Preferably, the end of the leveling plate close to the powder to be separated is a conical structure with an angle of 30-40°, so that the powder to be separated can pass through the leveling plate smoothly.

[0078] In some embodiments, a second guide fin group is provided at the entrance of the acceleration section slide.

[0079] Preferably, the first guide fin group and the second guide fin group each include a plurality of guide fins arranged at equal intervals.

[0080] Specifically, the height of the guide fin is 1 mm, the length of the guide fin along the powder flow direction is 12 mm, and the width of the guide fin perpendicular to the powder flow direction is 0.2-0.3 mm.

[0081] In some embodiments, the acceleration section slideway and the deceleration section slideway are designed in an integrated manner.

[0082] In some embodiments, the acceleration section slideway and the deceleration section slideway are designed with an oblique angle splicing.

[0083] In some embodiments, a second vibrator is provided on the back of the slow-speed section chute to prevent the powder to be separated from accumulating on the slow-speed section chute.

[0084] In some embodiments, the device further comprises a first powder recovery bin connected to the second discharge port.

[0085] In some embodiments, the device further comprises a second powder recovery bin connected to the outlet of the recovery section slide.

[0086] Preferably, the outlet of the recovery section slide is a square funnel structure.

[0087] In this embodiment, the function of the acceleration section slide is to create a large speed difference between the spherical powder and the shaped powder, and the function of the deceleration section slide is to slightly reduce the speed of the spherical powder and the shaped powder, and the movement direction is closer to the horizontal, so as to facilitate the separation of the spherical powder and the shaped powder at the second discharge port. The slower shaped powder falls from the second discharge port to the first powder recovery bin to be recovered, and the faster spherical powder passes over the second discharge port into the recovery section slide and is recovered by the second powder recovery bin.

[0088] In some embodiments, the device further comprises a sealing cover disposed above the variable-angle inclined multi-stage slideway assembly, for sealing the variable-angle inclined multi-stage slideway assembly to reduce material loss and dust.

[0089] Preferably, the sealing cover is a transparent sealing cover.

[0090] Preferably, the sealing cover is made of inorganic glass.

[0091] In some embodiments, the device also includes a plurality of support rods and a plurality of fixing bolts arranged below the variable-angle inclined multi-stage slide group, which are used to adjust the inclination angle and height of the acceleration section slide, the deceleration section slide and the recovery section slide.

[0092] In some embodiments, the device also includes a slide rail disposed below the first powder recovery bin and the second powder recovery bin to facilitate the removal and replacement of the first powder recovery bin and the second powder recovery bin.

[0093] In summary, the solution proposed by the present invention has the following technical effects:

[0094] The invention is based on the friction principle, fully utilizes the dead weight and shape characteristics of the powder, and realizes the automatic separation of spherical powder and irregular powder with similar weight and size by designing a variable-angle inclined multi-stage slideway group.

[0095] In addition, the present invention provides specific relationships among the horizontal width of the second discharge port, the difference between the position height of the entrance of the recovery section slide and the position height of the exit of the deceleration section slide, the length of the acceleration section slide, the inclination angle of the acceleration section slide, and the friction coefficient of the acceleration section slide.

[0096] In addition, the device of the present invention has a high separation rate for flaky powder, satellite powder and other special-shaped powders, with the residual amount of the first separation being less than 10% and the residual amount of the second separation being less than 3%.

[0097] Please note that the technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. The above embodiments only express several implementation methods of the present application, and their descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present application, several variations and improvements can be made, which all belong to the scope of protection of the present application. Therefore, the scope of protection of the patent in this application shall be based on the attached claims.

Claims

1. A device for automatically separating irregular-shaped powder from spherical powder, characterized in that: The device comprises: A feed bin, wherein a feed port is disposed at one end of the feed bin and a first discharge port is disposed at the other end; A variable angle inclined multi-stage slideway group, the variable angle inclined multi-stage slideway group comprising an acceleration section slideway connected to the first discharge port, a deceleration section slideway connected to the outlet of the acceleration section slideway, and a recovery section slideway connected to the outlet of the deceleration section slideway; A second discharge port with a preset horizontal width is arranged at the interface position of the deceleration section chute and the recovery section chute, the entrance height of the recovery section chute is lower than the exit height of the deceleration section chute, the inclination angle of the recovery section chute is equal to the inclination angle of the acceleration section chute, and the inclination angle of the deceleration section chute is one third to one half of the inclination angle of the acceleration section chute.

2. The device for automatically separating irregular-shaped powder from spherical powder according to claim 1, characterized in that: The horizontal width of the second discharge port is greater than the horizontal width of the free fall of the irregular powder after passing through the acceleration section chute, and is smaller than the horizontal width of the free fall of the spherical powder after passing through the acceleration section chute; The horizontal width d of the free fall of the irregular powder after passing through the acceleration section slide 异 for: The horizontal width d of the free fall of the spherical powder after passing through the acceleration section slide 球 for: Among them, V 异 is the speed of the irregular powder after passing through the acceleration section slide, t 异 is the free fall time of the shaped powder after passing through the acceleration section slide, l is the length of the acceleration section slide, g is the gravity acceleration, α is the inclination angle of the acceleration section slide, μ is the friction coefficient of the acceleration section slide, V 球 is the speed of the spherical powder after passing through the acceleration section slide, t 球 It is the free fall time of spherical powder after passing through the acceleration section slide.

3. The device for automatically separating irregular-shaped powder from spherical powder according to claim 1, characterized in that: The difference between the height of the entrance of the recovery section chute and the height of the exit of the deceleration section chute is greater than the vertical height of the free fall of the spherical powder after passing through the acceleration section chute, and is less than the vertical height of the free fall of the irregular powder after passing through the acceleration section chute; The vertical height of the free fall of the irregular powder after passing through the acceleration section slideway is h 异 for: The vertical height of the spherical powder falling freely after passing through the acceleration section slideway is h 球 for: Where g is the acceleration due to gravity, t 异 is the free fall time of the irregular powder after passing through the acceleration section slide, t 球 It is the free fall time of spherical powder after passing through the acceleration section slide.

4. The device for automatically separating irregular-shaped powder from spherical powder according to claim 1, characterized in that: A first vibrator is arranged on the side of the feed bin, a first guide fin group is arranged at the first discharge port, and a screed plate is arranged between the first guide fin group and the acceleration section slideway.

5. The device for automatically separating irregular-shaped powder from spherical powder according to claim 1, characterized in that: A second guide fin group is arranged at the entrance of the acceleration section slideway.

6. The device for automatically separating irregular-shaped powder from spherical powder according to claim 1, characterized in that: The acceleration section slideway and the deceleration section slideway are designed in an integrated manner.

7. The device for automatically separating irregular-shaped powder from spherical powder according to claim 1, characterized in that: The acceleration section slideway and the deceleration section slideway are designed with an oblique angle splicing.

8. The device for automatically separating irregular-shaped powder from spherical powder according to claim 1, characterized in that: A second vibrator is arranged on the back side of the deceleration section slideway.

9. The device for automatically separating irregular-shaped powder from spherical powder according to claim 1, characterized in that: The device also includes a first powder recovery bin connected to the second discharge port.

10. The device for automatically separating irregular-shaped powder from spherical powder according to claim 1, characterized in that: The device also includes a second powder recovery bin connected to the outlet of the recovery section slideway.

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