OPTIMIZATION OF MACHINE PARTS MODELS FOR 3D PRINTING

When manufacturing machine parts using additive 3D technologies, we are faced with the task of choosing a specific manufacturing technology, material, and settings for the 3D printing process. These factors affect the manufacturing time, cost, accuracy, strength and other criteria for the performance of machine parts. Based on this, the purpose of the study is to develop recommendations for optimizing models of machine parts for 3D printing. 
The study describes the main approaches to optimizing three-dimensional models of machine parts at the design stage. This optimization avoids a number of problems that arise when using various 3D technologies: FDM (fused deposition modeling), SLA (laser stereolithography), etc. Depending on the type of the designed part and the applied additive 3D technology, additional requirements and restrictions are imposed on the models. 
The issues of optimizing models in terms of 3D printing time, manufacturing cost, geometry (accuracy) of the resulting model are considered, and the issues of the strength of the entire part or its individual elements are also partially investigated. Specific design solutions and recommendations for the manufacture of rotation parts, in particular, shafts and gears, are given. The issues of occurrence of some defects associated with overheating, uneven cooling and plastic shrinkage are considered. The simplest models for studying critical parts for strength are described. 
Recommendations have been developed for determining the properties of machine parts manufactured using additive 3D technologies for their design. 
This study will be of interest primarily to developers of 3D models and is designed to eliminate some of the problems that arise during 3D printing at the product design stage.