Measuring of Axis Errors and Their Prognosis During Aircraft Parts Machining

Abstract

The paper presents the use of simple models for forecasting errors of CNC machine tools. Forecasted errors measured on a CNC machine toll, using a system of QC 20 Ballbar were roundness and squareness errors axis of the CNC machine tool. These errors were measured on a machine tool designed for machining aircraft parts. Two methods of error prediction were used in the work: Simple Moving Average and Weighted Moving Average Method Specification. Modeling of results based on time series and forecasting were presented in graphic form. Measurement results and time series were obtained on the basis circular test QC20 Ballbar. The prognosis acceptability assessment is done on the basis of an average squared prognosis error ex post s*.