Patent ID: 6732056
Filing Date: 2004-05-04
Classification: B23Q,G05B

Abstract:
A method of monitoring the wear condition of a milling tool (2) during the machining of a metal workpiece (4) comprising the steps of(a) detecting vibrations of both the milling tool (2) and the metal workpiece (4) at varying cutting, engagement and/or contact conditions between the milling tool (2) and the workpiece (4) at different locations along the workpiece (4), (b) generating measuring signals from the detected vibrations, (c) transforming the measuring signals into wavelet coefficients through wavelet functions, (d) calculating wear condition parameters for the milling tool (2) from the resultant wavelet coefficients, (e) repeating the performance of steps (a) through (c) at at least another location along one of the metal workpiece (4) or a different workpiece and the milling tool (2) under comparable cutting, engagement and/or contact conditions, and (f) evaluating the wear condition of the workpiece on the basis of changes in the wear condition parameter of step (d) to that resulting from the performance of step (e).