Calibration method and device for hollow powder in metal powder

A metal powder and calibration device technology, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of difficult calibration of quality parameters such as the hollow rate of metal powder, and achieve the effect of simple operation

Inactive Publication Date: 2018-03-23
SHENZHEN WEINA ADDITIVE TECH CO LTD
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Problems solved by technology

[0005] The present invention aims to solve the technical problem that the existing quality parameters such as the hollow ratio of the metal powder used for 3D printing are difficult to calibrate

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  • Calibration method and device for hollow powder in metal powder

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Embodiment Construction

[0020] In order to make the purpose, technical solutions and advantages of the invention clearer, the technical solutions in the invention will be clearly described below in conjunction with the accompanying drawings in the invention. Obviously, the described embodiments are part of the embodiments of the invention, not all of them. Example. Based on the embodiments of the invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the invention.

[0021] Such as figure 1 As shown, the present invention provides a calibration device for hollow powder in metal powder, which device includes a 3D-CT scanning device 3 and a container 4, the container 4 is used to hold the metal powder to be detected, and the metal powder to be detected is located in the 3D-CT scanning In the scanning area of ​​the equipment 3, the 3D-CT scanning equipment 3 conducts a 360° all-round tomographic scan on the met...

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Abstract

The invention relates to the field of 3D (three-dimensional) printing additive manufacturing and powder metallurgy, and provides a calibration method and device for hollow powder in metal powder. Themethod comprises the following steps of selecting and loading the same batch of quantitative metal powder into a container, obtaining a three-dimensional image of the metal powder loaded in the container by using an X-ray computerized tomography scan manner, analyzing holes in the three-dimensional image, judging spherical and near-spherical holes as the hollow powder of the metal powder, judgingother holes with irregular shapes as interspaces between powder, and obtaining a hollow rate of the metal powder according to the quantity of hollow metal powder and data of the three-dimensional image. By sampling and containing the quantitative metal powder through using the container, and then obtaining the three-dimensional image through X-ray computerized tomography scan, the hollow situationof all metal powder in a sample can be obtained, a detection result can be used for accurately embodying the hollow rate of the whole batch of metal powder, and the operation is simple and efficientin the whole detection process.

Description

technical field [0001] The invention relates to the fields of 3D printing additive manufacturing and powder metallurgy, in particular to a method and device for calibrating hollow powder in metal powder. Background technique [0002] The high-pressure gas atomization method is currently the mainstream method for preparing metal 3D printing powder. The metal powder prepared by this method has a certain number of hollow powder defects. [0003] The hollow powder will affect the performance of the final printed molded part. Calibrating the proportion (hollow rate) of the hollow powder in the same production batch is an important indicator to measure the quality of the powder product. [0004] At present, there is no good method for detecting the hollowness of powder. The only way is to prepare a sample of powder cross section by scanning electron microscope (SEM), and observe the solid and hollow state of powder qualitatively. However, this method needs to grind and polish the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/046
CPCG01N23/046G01N2223/03G01N2223/1016G01N2223/62
Inventor 孔令鸿高玉来
Owner SHENZHEN WEINA ADDITIVE TECH CO LTD
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