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Simulating air flows for chip removal in dry machining

: Neugebauer, Reimund; Wieland, P.; Harzbecker, C.

International Institution for Production Engineering Research -CIRP-, Paris:
CIRP 2nd International Conference on High Performance Cutting 2006. CD-ROM : June 12 - 13, 2006, Vancouver, BC
Vancouver, 2006
International Conference on High Performance Cutting <2, 2006, Vancouver>
Fraunhofer IWU ()
Werkzeugmaschine; Trockenbearbeitung; Luftströmungssimulation; Arbeitsraumgestaltung; machine tool; dry cutting; airflow

Especially during a dry-machining process the clogging of hot chips influence the thermal behavior of machine tools. Hence, it is of particular interest to remove the chips quickly and completely out of the workspace. The application of air streams is one appropriate way to achieve this result. The paper shows the simulation results by using two-phase airflow models. In a first step, the airflow is calculated using FEM/CMD-software. In a following step, the calculation of the trajectories of the chips is made. Some experimental and numerical results are presented. This method enables the optimization of the shape of the workspace to achieve a better chip removal. The basic idea is that only locally effective flows can be generated with sufficient intensity. Three air flow scenarios in the workspace of a machine tool have been analyzed.