Calibration and Measurement Study on Density of Selective Laser Sintered 3D Printing Powder Bed

Abstract

The commonly used method for measuring the density of a selective laser sintered powder bed is to extract a certain volume of powder bed powder, measure the mass of the powder, and then calculate the density of the powder bed using the mass formula. Aiming at the shortcomings of the existing methods, such as complex operation and low measurement accuracy, this paper proposes a method based on plumb bob method for selective laser sintering powder bed density measurement. The method can measure the density of the powder bed without causing large damage to the powder bed, and the measurement efficiency and precision are higher than the existing measurement methods. In this test, the most commonly used ABS powder was used, and its density was calibrated using the plumb method. The function of the depth between the depth of the plumb bobbin and the density of the powder bed was fitted to the density of the powder bed. The measurements provide data support.