The generation of tool paths for ultra-precision machining is still a limiting factor in the manufacturing of parts with complex optical surfaces. In conventional machining as well as in complex five axes machining the application of CAD- and CAM-software for the generation of tool paths is state of the art. But these software solutions are not able to generate tool paths according to the high requirements of ultra-precision machining. This paper describes possible ways to generate tool paths for ultra-precision machining when the optical surface can be analytically described or when the surface data is derived from optical design software. Ultra-precision milling experiments with different tool paths have been carried out and the quality of the machined geometry has been evaluated concerning the achievable form accuracy.
[1]
Les A. Piegl,et al.
The NURBS book (2nd ed.)
,
1997
.
[2]
Ekkard Brinksmeier,et al.
Merging Technologies for Optics
,
2007
.
[3]
Tae Jo Ko,et al.
NURBS interpolator for constant material removal rate in open NC machine tools
,
2004
.
[4]
C. Brechera,et al.
MANUFACTURING OF FREE-FORM SURFACES IN OPTICAL QUALITY USING AN INTEGRATED NURBS DATA INTERFACE
,
2004
.
[5]
Les A. Piegl,et al.
The NURBS Book
,
1995,
Monographs in Visual Communication.
[6]
Christian Brecher,et al.
NURBS Based Ultra-Precision Free-Form Machining
,
2006
.