Author(s)

G.T. Smith, C. Sims, A.D. Hope & M. Gull

Abstract

A stereometric artefact for volumetric calibration of machining centres G.T. Smith*, C. Sims', A.D. Hope* & M. Gull* Faculty of Technology, Southampton Institute, Southampton, UK Atomic Weapons Establishment, Aldermaston, UK Abstract At present, the volumetric calibration of machining centres relies on Laser/Optical techniques, Ballbars, or specially-designed Artefacts. This current work describes the development of a dynamic/static artefact for the assessment of stereometric and positional uncertainties on machining centres. Not only can this artefact be used for cutting trials under anticipated production feedrates at a series of predetermined heights within the machine's volumetric envelope at known positional orientations, but the replaceable machined discs can be directly employed in comparative measurement, against a ballbar, checked on a CMM, or more specifically utilising a roundness instrument. Positional error is based upon trianguiation of the geometric po

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