J. Mou, A SYSTEMATIC-APPROACH TO ENHANCE MACHINE-TOOL ACCURACY FOR PRECISION MANUFACTURING, International journal of machine tools & manufacture, 37(5), 1997, pp. 669-685
As competitive pressures demand higher levels of productivity and auto
mation, accuracy and reliability of products become increasingly impor
tant. Innovations in manufacturing technology also are driven by deman
ds to shorten production cycle time and to maintain a consistently hig
h level of product quality in an advanced manufacturing environment. I
nnovative and cost-effective methods must be developed to advance prec
ision manufacturing technologies to compete in the global economy. In
this paper, a systematic approach is presented to advance the accuracy
and functionality of multi-axis machines for precision manufacturing.
Four major steps are introduced. First, a method is presented for rap
id characterizing of the accuracy of multi-axis machines. Detailed der
ivation of a generalized error model is given. Second, a method is dis
cussed on the feasible applications of on-machine sensing and analysis
. The information obtained from on-machine sensing process is used wit
h the information collected from post-process inspection to improve th
e machine performance. Third, a method is presented for utilizing post
-process inspection and innovative data analysis techniques to decoupl
e the effects of process- and machine-related errors. Finally, an adap
tive error correction system is outlined for iterative identification
of the residual error and the fine-tuning of the error model for more
accurate error modeling and compensation. (C) 1997 Published by Elsevi
er Science Ltd.