Browsing by Keyword "Tool wear"
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Item An investigation of cutting forces and tool wear in turning of Haynes 282(2019-01) Suárez, A.; Veiga, F.; de Lacalle, L. N.López; Polvorosa, R.; Wretland, A.; FABRIC_INTEL; Tecnalia Research & InnovationSuperalloys belong to the group known as difficult to cut materials, and inside this category of material Haynes 282 is considered a novel material with huge applicability subjected to automobile, aerospace and gas turbine industries. The characterization of machining of this new material evidences a lot of importance. Therefore, this paper presents an experimental investigation into the effect of lubricant pressure and material heat treatment on cutting forces, machined surface quality and tool wear evolution on turning of superalloy Haynes 282. Face turning of hollow discs with fixed cutting conditions with cemented carbides tools where carried out to evaluate machinability. The results show that Haynes 282 Alloy in solution annealing Large Grain Solution (LGS) state has better machinability than precipitation hardened Large Grain Aged (LGA) state in terms of force levels and tool wear. In terms of coolant pressure effect, a significant improvement is not observed in the case of High pressure coolant (HiPC).Item Tool wear detection in dry high-speed milling based upon the analysis of machine internal signals(2008-12) Rivero, A.; López de Lacalle, L. N.; Penalva, Ma Luz; SG; FABRIC_INTELUnattended machining plants require intelligent monitoring systems, able to detect the different events that can happen during the machining process. In particular, the control of tool wear is an important objective of a monitoring system when dry machining is applied. This work evaluates the suitability of a tool wear monitoring system based on machine tool internal signals. It presents a sensorless monitoring procedure for the dry and high-speed milling of aerospace aluminium alloys. Dry high-speed experiments were performed using aluminium Al 7075-T6 workpieces. The sensor data from internal signals were compared and analyzed, assessing the deviation in representative variables in time and frequency domains. The signal analysis confirmed the relevance of cutting force signals for tool wear monitoring in the high-speed milling of aluminium alloys.Item Tool wear on nickel alloys with different coolant pressures: Comparison of Alloy 718 and Waspaloy(2017-04-01) Polvorosa, R.; Suárez, A.; de Lacalle, L. N.López; Cerrillo, I.; Wretland, A.; Veiga, F.; FABRIC_INTEL; Tecnalia Research & InnovationCurrently, Inconel 718 and Waspalloy are common alloys in the machining of aeroengine components. The former is more known than the latter, so the comparison of tool wear patterns at different coolant pressures can be very significant, and with direct application to real production and research. In both alloys the grain size is key f for the flank and notch wear appearance and successive growth. In the work here presented, results of face-turning testing for both cases are summarized, using cooling at 6 (conventional) and 80 bar. In short, large grain alloy structure leads to higher notch wear, whereas the smaller grain one leads to higher flank wear. However behaviors of both alloys are different in relation to pressure value. Different insert nose wear patterns ere also found, worse in the case of Waspalloy.