Investigations on milling performance of Polyetheretherketone (PEEK)

Abstract

Abstract This paper presents a comprehensive investigation into the milling performance of Polyetheretherketone (PEEK), a high-performance thermoplastic polymer widely used in various engineering applications. The study focuses on understanding the impact of cutting feed and machining strategies (zig, zig-zag, and follow periphery) on surface texture and integrity during milling processes. Additionally, key factors such as maximum cutting temperature, cutting forces, and variation in surface hardness are systematically examined and analyzed. Two cutting feed ranges, 0.0167–0.025 mm/tooth and 0.05–0.15 mm/tooth, are employed in experimental setups to explore their influence on the machined surfaces. Different machining strategies are applied to assess their effects on surface quality and integrity. The investigation involves the use of advanced tools, including a confocal microscope and an interferometer (Mahrsurf CWM100, Mahr, Germany), for precise surface texture analysis. In-depth discussions and analyses are provided on the observed variations in maximum cutting temperature, cutting forces, and surface hardness during the milling of PEEK. The findings aim to enhance the understanding of the milling behavior of PEEK and offer valuable insights for optimizing machining parameters to achieve desired surface characteristics. This research contributes to the broader knowledge of polymer machining and provides practical implications for the precision milling of PEEK in engineering applications.