An Investigation of the Properties of 3D Printing Materials According to Additive Manufacturing Conditions Using Ultrasonic Wave

3-Dimension (3D) printers are increasingly being used in high-tech industrial applications technology, because they can produce sophisticated products by laminating materials with less time and cost compared to cutting processing, such as conventional machine tools. However, since the reliability evaluation criteria and method for laminated manufacturing products are not clear, accidents cannot be prevented when 3D printed laminates are used as structures and machined parts. In this paper, ultrasonic wave propagation characteristics were evaluated on the specimens manufactured by laminating acrylonitrile butadiene styrene resin materials with a stereo lithography apparatus 3D printer using the ultrasonic inspection method among non-destructive techniques. Specimens were laminated in units of 0.1 mm, and thicknesses of 1, 2, 4, 6 and 8 mm were applied as variables. In addition, the ultrasonic characteristics according to laminating direction were analyzed by laminating diagonally and vertically, including laminating in the horizontal direction, and defect specimens were produced to check whether defects were read. It was found that the ultrasonic velocity of the horizontally laminated specimen having a thickness of less than 4 mm was slower than the ultrasonic reference velocity, and that the ultrasonic velocity was affected according to the laminated direction. In addition, by arranging the defect location of the specimen differently, it was determined whether the defect was detected, and whether it was possible to check the location. Based on the results of this study, it will be possible to broadly apply this technique to advanced industrial technologies through evaluation of the condition and reliability of laminated manufacturing products manufactured with 3D printers.