Abstract
Geometric error measurements are performed to evaluate a variety of machining factors and conditions as well as the work done on the machine tools. With the increasing complexity of machining processes and ever-growing requirements for accuracy and precision, the demand for advanced methods and instruments for process optimization has also increased. To meet this demand, error measurements and compensations for machine tool components, and on-machine measurement for process, require an expansion of manufacturing metrology to include comprehensive closed-loop control of the machining process. In this chapter, we firstly review the measurement methodologies of volumetric error generated in the machine tools from the perspective of measurement instruments and strategies. Then we review technical trends in on-machine measurements for process and product quality control, discussing the probing techniques for geometric parameters of workpieces and measurement tools for tool setting in detail, respectively. To eliminate the effects of disturbances on machining process and adjust the control quantities to optimal values for robustness, integration of online machining and process monitoring is essential. Spreading measurement targets and applications are comprehensively reviewed.
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