Uncertainty evaluation method for axi-symmetric measurement machines

International Journal of Metrology and Quality Engineering

Patrick S. Keogh¹  Jody Emlyn Muelaner¹ 

[1] University of Bath, North East Somerset, UK

关键词: International Journal;    Metrology;    Quality Engineering;    IJMQE;    EDP Sciences;   

DOI  :  10.1051/ijmqe/2016011

学科分类：工程和技术（综合）

来源: EDP Sciences

【 摘 要 】

This paper describes a method of uncertainty evaluation for axi-symmetric measurement machines. Specialized measuring machines for the inspection of axisymmetric components enable the measurement of properties such as roundness (radial runout), axial runout and coning. These machines typically consist of a rotary table and a number of contact measurement probes located on slideways. Sources of uncertainty include the probe calibration process, probe repeatability, probe alignment, geometric errors in the rotary table, the dimensional stability of the structure holding the probes and form errors in the reference hemisphere which is used to calibrate the system. The generic method is described and an evaluation of an industrial machine is described as a worked example. Expanded uncertainties, at 95% confidence, were then calculated for the measurement of; radial runout (1.2 μm with a plunger probe or 1.7 μm with a lever probe); axial runout (1.2 μm with a plunger probe or 1.5 μm with a lever probe); and coning/swash (0.44 arcseconds with a plunger probe or 0.60 arcseconds with a lever probe).

【 授权许可】

CC BY