This study investigates the effectiveness of trochoidal (adaptive) milling in machining Glass Fiber Reinforced Polymer (GFRP), emphasizing its potential advantages over conventional milling. Six coated solid carbide end mills, each with distinct geometries, were evaluated under identical conditions to assess the cutting forces, surface quality, dimensional accuracy, burr formation, chip size distribution, and tool wear. Trochoidal milling demonstrated shorter cycle times-up to 23% faster-and higher material removal rates (MRRs), while conventional milling provided superior dimensional control and smoother surfaces in certain fiber-sensitive regions. A four-tooth cutter with a low helix angle (10°) and aluminum-oxide coating delivered the best overall performance, balancing minimal tool wear with high-quality finishes (arithmetic mean roughness, Ra, as low as 1.36 μm). The results indicate that although conventional milling can exhibit a 25%-lower RMS cutting force, its peak forces and extended machining times may limit the throughput. Conversely, trochoidal milling, when coupled with an appropriately robust tool, effectively manages the cutting forces, improves the surface quality, and reduces the machining time. Most chips produced were less than 11 μm in size, highlighting the need for suitable dust extraction. Notably, a hybrid approach-trochoidal roughing followed by conventional finishing-offers a promising method for achieving both efficient material removal and enhanced dimensional accuracy in GFRP components.

Department of Process Control Faculty of Informatics Tomas Bata University in Zlín Nad Stráněmi 4551 76005 Zlín Czech Republic

Department of Production Engineering Faculty of Mechanical Engineering Cracow University of Technology 31 155 Cracow Poland

Department of Production Engineering Faculty of Technology Tomas Bata University in Zlín Vavrečkova 5669 76001 Zlín Czech Republic

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