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Measuring method for additive manufacturing powder bed quality

A measurement method and additive manufacturing technology, applied in the direction of additive manufacturing, processing and manufacturing, manufacturing tools, etc., can solve problems such as the inability to control the uniformity of the powder layer thickness, the poor quality of molded parts, and the lack of scientific measurement methods for the thickness of the powder layer. , to achieve the effect of improving the quality of additive manufacturing powder bed, convenient operation, and simple and reliable measurement method

Pending Publication Date: 2019-02-01
HUAQIAO UNIVERSITY
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the current industrial production process, due to the poor quality of powder coating, it often leads to poor quality of molded parts, low precision, warping and even molding failure.
The core key is that the uniformity of the thickness of the powder layer cannot be controlled, and the current stage lacks a scientific method for measuring the thickness of the powder layer

Method used

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  • Measuring method for additive manufacturing powder bed quality
  • Measuring method for additive manufacturing powder bed quality

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Experimental program
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Effect test

Embodiment Construction

[0019] Please check figure 1 , the present embodiment takes nylon powder as object, and its measuring method is as follows:

[0020] The following devices are used: powder feeding cylinder 4, powder spreading roller 5, forming cylinder 3, motor assembly, light source transmitter 6, camera 7, image processing and display system 8;

[0021] The powder feeding cylinder 4 and the forming cylinder 3 are arranged side by side, and the upper edges of the two are flushly connected to form a workbench. The bottom of the powder feeding cylinder 4 is movable in the vertical direction to adjust the capacity of the powder feeding cylinder 4. The forming cylinder 3 is used to form the powder bed 1, and the forming part 2 is arranged in the forming cylinder 3, and the bottom of the forming cylinder 3 is movable in the vertical direction for adjusting the capacity of the forming cylinder 3;

[0022] The powder spreading roller 5 is arranged on the top of the powder feeding cylinder 4, and th...

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Abstract

The invention discloses a measuring method for additive manufacturing powder bed quality. The cylinder bottom of a powder feeding cylinder is controlled by a motor unit to rise by one unit height, thebottom of a forming cylinder is lowered by one unit height, and a powder paving roller moves from the powder feeding cylinder to the forming cylinder to pave a layer of powder to form a powder bed; and the powder paving roller conducts powder paving layer by layer, a light source emitter continuously projects light sources with different pitches onto the surface of the powder bed, a camera is used for collecting images of the light sources, an image processing and display system constructs a three-dimensional shape of the surface of the powder bed through image information collected by the camera, according to the three-dimensional shape of the surface of the powder bed, a mathematical statistics method is used for calculating the mean, the standard deviation, the degree of asymmetry andthe peak value, and then the powder bed quality is represented. The measuring method is simple, reliable and convenient to operate, can quantitatively represent the powder bed quality, and helps to improve the additive manufacturing powder bed quality.

Description

technical field [0001] The invention relates to a method for measuring the quality of a powder bed for additive manufacturing. Background technique [0002] The rapid development of additive manufacturing technology is a representative technology in advanced manufacturing. Countries around the world have adopted additive manufacturing as a new growth point for future industries, and it is also a breakthrough direction for major manufacturing countries to develop next-generation advanced manufacturing technologies. Additive manufacturing has the unique advantages of personalization, customization and manufacturing complex parts, which can shorten the development cycle, reduce manufacturing costs, and subvert business models. It has been widely used in many fields. The powder bed-based additive manufacturing process mainly includes preheating, powder spreading, sintering and melting, and post-processing. In the powder coating process stage of additive manufacturing, a flat, u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C64/393B29C64/153B29C64/205B29C64/218B22F3/105B28B1/00B33Y10/00B33Y50/02
CPCB28B1/001B29C64/153B29C64/205B29C64/218B29C64/393B33Y10/00B33Y50/02B22F10/00B22F10/37B22F12/41B22F12/90B22F10/28B22F12/63Y02P10/25
Inventor 谭援强张江涛张鸿李享徐西鹏
Owner HUAQIAO UNIVERSITY
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