20.500.12556/DKUM-96689 Influence of cutting-edge tip geometry on the tool–workpiece electrical contact resistance It is well established that the electrical resistance generated at the contact interface between dissimilar metals is strongly correlated with the actual contact area. By leveraging this phenomenon in cutting operations, we have successfully achieved in-process identification of flank wear width during machining. The method has shown particularly favourable performance under finishing conditions involving interrupted cutting, where tool monitoring is generally considered challenging. However, cutting operations employ a wide range of tool geometries, cutting parameters, and machining configurations, and it remains unclear whether the proposed approach is universally applicable across these variations. To address this issue, the present study focuses on turning, a process in which the tool–workpiece contact time is relatively long, and investigates the applicability of the method to diverse cutting geometries. Specifically, we examine how differences in tool geometry and the chip–rake-face contact area influence the electrical contact resistance between the tool and the workpiece. The results indicate that, for unused tools, variations in nose radius do not affect the electrical contact resistance measured at the tool–workpiece interface. In contrast, the contact between the flowing chip and the rake face is strongly dependent on rake angle. Consequently, for tools with negative rake angles, chip–rake-face interaction was found to have a pronounced influence on the electrical contact resistance at the tool–workpiece interface. tool wear detection contact resistance in-process monitoring real time evaluation rake angle nose radius zaznavanje obrabe orodja kontaktni upor nagibni kot true false true Chair of Production Engineering (CPE), University of Maribor Faculty of Mechanical Engineering Angleški jezik Slovenski jezik https://apem-journal.org/ Članek v reviji 2026-01-23 12:28:17 2026-01-23 12:28:17 2026-03-13 13:27:17 0000-00-00 00:00:00 2025 0 0 str. 423-433 no. 4 Vol. 20 Dec. 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2025-12-01 2025-12-13 2025-12-31 658.5 265902339 10.14743/apem2025.4.549 1854-6250 APEM20-4_423-433.pdf APEM20-4_423-433.pdf 1 7F12A39CA7F2AFB732FACE8480C59108 9fed8b6fce3fd6a4260edd7e12f4b6fbd3c3ec01a54ef69158605c2fee0e8a5d fb108c9b-f84e-11f0-8c23-00155d00018d https://dk.um.si/Dokument.php?lang=slv&id=202488 https://apem-journal.org/Archives/2025/Abstract-APEM20-4_423-433.html 0 006b7ecd-f84f-11f0-8c23-00155d00018d https://dk.um.si/Dokument.php?lang=slv&id=202489 Fakulteta za strojništvo Advances in production engineering & management 0 0 0