OPTIMIZATION OF HIGH-SPEED MACHINING PARAMETERS OF THIN-WALLED ALUMINIUM STRUCTURES IN THE FUNCTION OF SURFACE ROUGHNESS

Due to their homogeneity and excellent ratio between load capacity and weight, thinwalled aluminum structures are used as structural parts in the aerospace, automotive and military industries.The manufacture of these thin-walled structures is mainly done by removing a large amount of material from full raw pieces, sometimes up to 95% of their initial mass.Because of a large volume of material removing, it is necessary to achieve high productivity, which is limited by the lack of rigidity of the thin walls of these structures.As a result, errors occur, while reducing accuracy and machining quality.The main subject and objective of this paper is related to the optimization of high-speed machining parameters of linear thin-walled structures made of aluminum alloy Al7075 from the aspect of surface quality of processed superficial as a goal function.For this purpose, experiments were carried out based on which conclusions were made of the influence of input parameters on the surface roughness.