Abstract
Thermal deformation due to the cutting heat causes cutting error. To avoid the problem, it is necessary to evaluate temperature of workpiece accurately. Finite element method (FEM) has been adopted to calculate temperature of workpiece. However, in order to realize accurate estimation, values of model parameters such as cutting heat and heat transfer coefficient should be determined empirically. Then, the FEM approach cannot be used for dynamic thermal change process like cutting. In this paper, a novel estimation method of temperature distribution is proposed. Parameters of the FEM model are dynamically estimated based on measured local temperature of the workpiece. The paper also presents results of an experiment by a developed prototype system.
