Measuring method for additive manufacturing powder bed quality

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...

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

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