Bistable parameter region caused by velocity dependent chip thickness in milling process

Bachrathy, D [Bachrathy, Dániel (műszaki mechanika), szerző] Műszaki Mechanikai Tanszék (BME / GPK); Stépán, G [Stépán, Gábor (mechanika), szerző] Műszaki Mechanikai Tanszék (BME / GPK)

Angol nyelvű Tudományos Konferenciaközlemény (Könyvrészlet)
    During the investigation of the commonly used, linear, 2 DoF model of the milling proc-ess, we found that large resonant vibrations can occur in some parameter regions. In this case, the commonly used stationary geometry of the chip thickness is no longer valid for correct dynamic analysis. A new non-linear model is constructed which considers both the surface regeneration effect and an improved type of chip thickness calculation. In this model, the large resonant vibration amplitudes result that the chip thickness dependence on the tool centre velocity is not negligible any more. The stability of the milling process was calculated by the DDE-BIFTOOL Matlab package. Fold bifurcation is found, which is an unusual type of loss of stability in milling processes. A bistable re-gion in the parameter space is also found, where the system has two stable periodic so-lutions and an unstable one, which leads to a special hysteresis phenomenon between two stable cutting processes.
    Hivatkozás stílusok: IEEEACMAPAChicagoHarvardCSLMásolásNyomtatás
    2021-05-11 19:13