Assessment of uncertainty of measurement with a tool probe on CNC machine tools

Abstract

The paper presents the results of measurement uncertainty obtained with a tool probe for 4 cutting tools with different values of the nominal radius rf = {3, 4, 5, 7} mm. The use of a tool probe formed the basis for acquisition of experimental data to assess the uncertainty budget of the measurement system. The estimation was based on a statistical analysis of the tool radius dimension measurements obtained. Each radius value was determined from 30 repetitions of the tool probe measurement. The mean value and standard uncertainty of the obtained test results were determined. Assuming a coverage factor of k=2, the expanded uncertainty U was determined to be between 0.00142 mm and 0.00462 mm for the range of tool radius tested. The standard uncertainty ranged from 0.00081 to 0.00231 mm. The standard uncertainty of the probe according to the manufacturer's documentation is 0.0015 mm.