Kg. Ahn et Dw. Cho, An analysis of the volumetric error uncertainty of a three-axis machine tool by beta distribution, INT J MACH, 40(15), 2000, pp. 2235-2248
Citations number
25
Categorie Soggetti
Mechanical Engineering
Journal title
INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE
This paper addresses the stochastic nature of the volumetric error of a mac
hine tool in 3-dimensional workspace, and proposes a new model helping the
prediction of the tolerances of products caused by uncertainties of a machi
ne tool without going through very costly and time-consuming production eva
luation. The probability of the volumetric error within the prescribed tole
rance in the case of a vertical type 3-axis machine tool is obtained in 3-d
imensional graphical form and the beta distribution is adopted to obtain a
distribution that can better approximate the real distribution of the sum o
f the variables. The direction of approach of a tool/workpiece is considere
d when the stochastic error parts of a machine tool are evaluated. In addit
ion, we verified experimentally that the stochastic parts of the volumetric
error are also affected by the direction of approach of a tool/workpiece.
(C) 2000 Published by Elsevier Science Ltd.