Deflection compensation modelling in machining of complex low-rigidity parts

摘要

The paper reports on a virtual environment for simulation and prediction of the deflection of thin wall parts during machining. It aims to increase the understanding of the causes of poor geometric accuracy by considering the impact of the machining forces on the deflection of thin walled structures. The proposed approach is based on identifying and modelling of key processing characteristics that influence part deflection, modelling of the material removal process using "voxels", and predicting and correcting the deflection of the parts. The decision making is based on a novel integrated environment using CAD and Finite Element Analysis tools. The reported work is part of an ongoing research on developing an adaptive machining planning environment for modelling, prediction, and selection of process and tool path parameters for rapid machining of complex low-rigidity high-accuracy parts.