GUIDELINES FOR TRACEABLE MEASUREMENTS ON MACHINE TOOLS

Robert Schmitt, Martin Peterek

Abstract

Flexible manufacturing processes for high quality products at low costs are one of the main research objectives in the field of production technology. The quality inspection of large or complex workpieces manufactured on machine tools often takes place beside the production line. To assure the traceability of the quality inspection the features are measured on a CMM in an isolated measurement room. The high invest for a CMM and influences like transport, handling and the loss of the original set up show the need for a machine tool integrated traceable measuring process for product’s quality assurance.<BR />Touch probes can be found in many new machine tools and shall provide the possibility of testing product characteristics right after the manufacturing process. But due to disturbances like machine defects or temperature fluctuations, the measurement process on the machine tool is not traceable. The measurement data are not comparable and cannot be used for process improvements or process control.<BR />New approaches at WZL are aiming to assure the traceability of the inspection processes on machine tools and Multi Technology Platforms (MTP). The fusion of appropriate methods for the traceability of CMM’s and innovative calibration methods for machine tools will allow the determination of a measurement uncertainty for the measurement system “touch probe and machine tool”. Different methods for the uncertainty evaluation of CMMs have been examined and validated for machine tools. Within the research activities a guideline has been developed that will allow the implementation of a traceable measurement process on machine tools. <BR />The objectives of the research activities are part of the Cluster of Excellence ‘Integrative Production Technology for high Wage Countries’ at the RWTH Aachen.

Keywords

traceability, large volume metrology, machine tools

Download

IMEKO-TC14-2013-46.pdf

DOI

-

IMEKO TC

TC14 - Measurement of Geometrical Quantities

Back to the proceedings