Thermal displacement of high speed spindle is very important problem to be solved. To solve heat
generation and thermal displacement problems that influence on the product accuracy, it is very
important to predict thermal characteristics of the spindle and it is positively necessary to select
the conditions of cooling, flow rate and preload of bearings. In this paper, 30,000rpm(1.455
?0
6
DmN) spindle was designed and produced. The analysis of thermal deformation for heat
generation of inner spindle was carried out using commercial program ANSYS
?
and the result
was compared with measured data using LabVIEW
and SCXI-1600, 1125 and 1126 module.
Temperature distribution and thermal displacement according to spindle speed are measured.
Using this method, it is possible to predict and to improve thermal characteristic of high speed
spindle by control spindle speed, bearing preload and cooling rate.