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Device for removing irregular particles in spherical powder and removing method for same

A spherical powder and spherical particle technology, which is applied in the field of devices for removing irregular particles in spherical powder, can solve the problems of reducing production efficiency and capacity loss, and achieve the effects of improving quality, reducing material loss, and increasing performance effects

Pending Publication Date: 2021-10-08
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitations of the technology itself, it is difficult to increase the sphericity rate when it reaches the upper limit; or to increase the sphericity rate by reducing production efficiency, which results in a decrease in production capacity loss

Method used

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  • Device for removing irregular particles in spherical powder and removing method for same
  • Device for removing irregular particles in spherical powder and removing method for same
  • Device for removing irregular particles in spherical powder and removing method for same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] (1) With NiTi spherical powder (average particle diameter D50 is 53-250 micron) as raw material, from figure 2 It can be seen that the raw material contains irregular particles and spherical particles;

[0087] (2) adopt figure 1 For the device shown, the length of the inclined plate is set to L1=260mm, the slope θ=36°, the horizontal platform L2=20mm, and the powder gap D=2.5mm under the hopper;

[0088] (3) Quantitatively load 50 grams of raw material NiTi spherical powder with a spoon, fill it into the hopper, the powder will spread out in the hopper, and drop from the long narrow leak at the lower end of the hopper to the inclined plate below, and the powder will move along the inclined plate Slide down to the horizontal platform and fall into the collection tank, and a small amount of powder remains on the inclined plate and the horizontal platform;

[0089] (4) Remove the spherical powder collection tank and replace it with another collection tank for irregular...

Embodiment 2

[0097] The method for removing irregular particles in this embodiment is the same as in Example 1, the difference is that the slope θ=70° of the slope of the inclined plate is adjusted, and the spherical powder processed is TC4 spherical powder (average particle diameter D50 is 15-53 microns).

[0098] The irregular particle content in the TC4 spherical powder was calculated to be 20.10wt% after treatment. The fluidity results of TC4 spherical powder before and after treatment were tested respectively, as shown in Table 1. According to the results, the fluidity of TC4 spherical powder is improved, 34.24s / 50g before treatment and 26.38s / 50g after treatment.

[0099] Taking the TC4 spherical powder before and after the treatment in this example, under the same conditions (laser power 170W, pulse duty ratio 80%), the self-developed M100 laser 3D printer was used to carry out SLM 3D printing entities respectively. The density of TC4 spherical powder without removing irregular par...

Embodiment 3

[0101] The method for removing irregular particles in this embodiment is the same as in Example 1, the difference is that the slope θ=20° of the slope of the inclined plate is adjusted, the horizontal surface L2=30mm, and the spherical powder processed is a zirconia spherical powder (average particle diameter D50 is 150 microns).

[0102] The irregular particle content in the zirconia spherical powder was calculated to be 5.30% after the treatment.

[0103] The fluidity results of the zirconia spherical powder before and after treatment were tested respectively, as shown in Table 1. According to the results, the fluidity of zirconia spherical powder is improved, 20.23s / 50g before treatment, and 19.10s / 50g after treatment.

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Abstract

The invention discloses a device for removing irregular particles in spherical powder and a removing method for the same, and belongs to the technical field of high-performance powder manufacturing. The device comprises a hopper, an inclined flat plate, a horizontal table board and a material receiving device, irregular powder in the spherical powder is removed, and the sphericity rate and fluidity of the spherical powder are improved; according to the removing method, some adhered ash and some small spherical particles with poor fluidity on spherical particles are removed, the quality of the spherical powder for 3D printing is improved, and the performance effect of 3D printing use is improved; and according to the device for removing the irregular particles in the spherical powder and the removing method for the same, operation is easy, small-batch spherical powder removing operation can be achieved, a large-size device can be manufactured, automation is achieved, and therefore the device and the removing method are used on a powder manufacturing production line. The invention further discloses a measuring method for the content of the irregular particles in the spherical powder.

Description

technical field [0001] The invention belongs to the technical field of high-performance powder manufacturing, and in particular relates to a device for removing irregular particles in spherical powder and a removal method thereof. Background technique [0002] As an advanced manufacturing technology, 3D printing can realize the close combination of new network technology, advanced material technology and digital manufacturing technology, and will become the core key technology of the third industrial revolution. Among them, in the metal 3D printing process, metal spherical powder is the key raw material, and it is necessary to ensure sufficient fluidity and bulk density to ensure stable and smooth powder delivery and high bulk density. Therefore, various spheroidization techniques need to be employed to obtain spherical powders. [0003] At present, the production of 3D printing metal spherical powder materials mainly includes gas atomization (GA), centrifugal atomization (...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B07B13/00B07B13/16B22F1/00B33Y40/10
CPCB07B13/003B07B13/16B33Y40/10
Inventor 石明黄见洪林文雄刘燕辉林紫雄
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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