Exploitation of a novel thermo-invariant Multi-Feature Bar for high-precision CMMs and Machine Tools testing

F Viprey (1) , Hichem Nouira (2) , Sylvain Lavernhe (1) , Christophe Tournier (1)

1 ENS Cachan - École normale supérieure - Cachan
2 LCM - Laboratoire commun de métrologie LNE-CNAM

A novel thermo-invariant Multi-Feature Bar (MFB) for Machine Tools (MTs) geometric errors' identification has been designed and manufactured. The proposed design of the MFB allows extracting three intrinsic parameters: one linear positioning and two straight-ness errors. The calibration of the MFB was performed on accurate coordinate measuring machines (CMMs) by applying the reversal technique, in order to separate the geometric errors between the MFB and the CMMs. Furthermore , an intercomparison was conducted between four European National Metrology Institutes (LNE, PTB, CMI, UM) to evaluate the reliability of the proposed calibration methodology and the geometric stability of the proposed material standard with respect to a detailed technical procedure. The collected results show sufficient dimensional stability over time.

Mots clés: Geometric errors; Intercomparison; Material standard; Calibration; Traceability

Domaines: Génie mécanique [physics.class-ph]

F Viprey, Hichem Nouira, Sylvain Lavernhe, Christophe Tournier. Exploitation of a novel thermo-invariant Multi-Feature Bar for high-precision CMMs and Machine Tools testing. International Journal of Advanced Manufacturing Technology, 2018, 96, pp.947-961. ⟨10.1007/s00170-017-1572-7⟩. ⟨hal-01705250⟩