Unfolded projection approach to machining non-coaxial parts on mill-turn machines

This paper presents a new method to analyze the effective cutting shapes an d machined surface errors for mill-turn machining of non-coaxial parts. Whi le the traditional projection methods fail in the mill-turn machining case, the Unfolded Projection Method maps the part surface and the cutter into a n unfolded domain (X-u-Y-u-Z(u)) to calculate the critical distance between the part surface and the cutter. The techniques presented in this paper ca n be used to analyze the machined surface errors and to improve the accurac y of the mill-turn machining processes, Computer implementation and illustr ative examples are also presented in this paper. (C) 1999 Elsevier Science B.V. All rights reserved.