by H.-C. Möhring, P. Kersting, S. Carmignato, J.A. Yagüe-Fabra, M. Maestro, R. Jiménez, E. Ferraris, L.T. Tunc, F. Bleicher, W.W.Wits, K. Walczak, M. Hedlind
Abstract
In 2011, a round robin test was initiated within the group of CIRP Research Affiliates. The aim was to establish a platform for linking interdisciplinary research in order to share the expertise and experiences of participants all over the world. This paper introduces a testpart which has been designed to allow an analysis of different manufacturing technologies, simulation methods, machinery and metrology as well as process and production planning aspects. Current investigations are presented focusing on the machining and additive processes to produce the geometry, simulation approaches, machine analysis, and a comparison of measuring technologies. Challenges and limitations regarding the manufacturing and evaluation of the testpart features by the applied methods are discussed.
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Could you explain the reason of the high measuring deviations (especially the differences between the different measurements)?
The maximum permissible errors (MPE) obtained for CT1 and CT2 are respectively: MPECT1 = 7.2 µm + (L/6.8) µm (L in mm) and MPECT2 = 7.0 µm + (L/5.7) µm.
Why are the measuring deviations (especially differences between the different measurements) much larger than this value? (e.g. SC1, 0.4 mm nominal, deviation of -15% = 60 micrometers, -2,7% ~ 10 micrometers)