STUDY ON DIMENSIONAL DEVIATION OF PARTS MANUFACTURED IN 3D PRINTING

3D printing is widely used in the fields of manufacturing with many kinds of materials applied such as polymer filaments, metal powders, and biological materials. 3D printing can create many products with complex profiles by building layer by layer. The paper presents the process of 3D printing with PLA plastic material and investigates the geometric deviation and size of holes by different printing conditions and printing directions. The theoretical model is built to analyze the causes of geometric errors and dimensions that is to propose the compensation for dimension. Research results show that the size error is directly proportional to the print layer thickness and then predict functions of size error has proposed. Research results can be applied exclusively in design and production parts by 3D printing technology.