Brouschkin, AlexanderAlexanderBrouschkinKöttner, LarsLarsKöttnerHintze, WolfgangWolfgangHintzeDege, Jan HendrikJan HendrikDege2024-07-082024-07-082024-06Procedia CIRP 123: 143-148 (2024)https://hdl.handle.net/11420/48190Carbon fibre-reinforced polymer (CFRP) is favored for its high strength to weight ratio, outstanding direction dependent mechanical properties and the high potential for load adapted design. However, machining unidirectional CFRP is challenging due to its anisotropic behavior, resulting in variable surface quality under identical machining parameters with different fibre orientations. Recently, a universal, process-independent model describing the engagement conditions in oblique cutting of unidirectional CFRPs has been developed, introducing the spatial fibre cutting angle θ0 and the spatial engagement angle ϕ0. Milling and drilling are mostly used for machining CFRP. Since the engagement conditions are rather complex, first analogy experiments are conducted in turning with variation of the setting and inclination angles. In this study, continuous surface profiles were recorded as a function of the spatial fibre cutting angle. Phenomenological and continuous wavelet analyses can be used to describe the surface profiles as a function of the spatial engagement conditions and to accurately predict them and the surface roughness using an inverse wavelet transformation. Experimental investigations with a side milling process of CFRP validate the prediction approach and show a good agreement between the experimental and predicted surface profiles.en2212-82712024143148https://creativecommons.org/licenses/by-nc-nd/4.0/carbon fibre reinforced plasticscarbon fibre reinforced polymers, cuttingsawingspatial engagement conditionssurface roughnessturningTechnology::620: Engineering::620.1: Engineering Mechanics and Materials ScienceConference Paper10.15480/882.1312010.1016/j.procir.2024.05.02710.15480/882.13120Conference Paper