Příspěvek k topologické optimalizaci součástí vyráběných aditivní technologií

Abstract

The topic of the dissertation is the topological optimization of components produced by additive manufacturing technologies. Indeed, these parts are with dimensions, shapes, and features that are difficult to print fully matching their CAD models. For this reason, it is necessary to print parts with certain reinforcements and supports, which must then be removed. When printing, there exist two major problems being the part tearing off the supports or the base plate, or the recoating bar colliding with the printed part. This dissertation focuses mainly on the geometry of the manufactured components, their orientation during printing and finishing operations. The work aims to establish a framework for the production process of topologically optimized components produced by additive manufacturing technology - the SLM method, given the need to examine in detail and determine the most suitable technological design and production process for different components. To achieve the goal, an analysis of the current state of SLM production technology is performed - a list of available printing materials, a detailed description of SLM technology, adverse events in 3D printing, etc. The analysis is based on professional publications, market research, and publicly available information in literature and web form. Based on the survey, a table of available software for topological optimization is created. The prediction of stress in components manufactured by the SLM method is also described. The process of designing and manufacturing components is shown in a flowchart, which is divided into three main parts. The methodology is verified on a rocker arm, the result of which is then compared with a conventionally manufactured part. Further verification of the design process takes place on a scooter frame, which is larger than the building chamber of the machine for its production. The procedure of division of the digital model, production, and subsequent assembly into the form of a finished frame is described. Additionally, an experiment focused on abrasive surface treatment methods is performed to determine suitable finishing operations for printed parts. Moreover, the last part of this work describes the experiment on the minimum channel diameter in components manufactured using SLM. To summarize, the achieved results are evaluated and the applicabilities for practice are determined.