Proceedings Article | 21 August 2014
Proc. SPIE. 9283, 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Design, Manufacturing, and Testing of Micro- and Nano-Optical Devices and Systems
KEYWORDS: Computational fluid dynamics, Diamond, Spindles, Manufacturing, Distortion, Computer simulations, Analytical research, Control systems design, Optics manufacturing, Fluid dynamics
In this paper, a four-axis ultra-precision lathe for machining large-scale drum mould with microstructured surface is
presented. Firstly, because of the large dimension and weight of drum workpiece, as well as high requirement of
machining accuracy, the design guidelines and component parts of this drum lathe is introduced in detail, including
control system, moving and driving components, position feedback system and so on. Additionally, the weight of drum
workpiece would result in the structural deformation of this lathe, therefore, this paper analyses the effect of structural
deformation on machining accuracy by means of ANSYS. The position change is approximately 16.9nm in the
X-direction(sensitive direction) which could be negligible. Finally, in order to study the impact of bearing parameters on
the load characteristics of aerostatic journal bearing, one of the famous computational fluid dynamics(CFD) software,
FLUENT, is adopted, and a series of simulations are carried out. The result shows that the aerostatic spindle has superior
performance of carrying capacity and stiffness, it is possible for this lathe to bear the weight of drum workpiece up to
1000kg since there are two aerostatic spindles in the headstock and tailstock.
