Abstract: Ultra-precision machining, as the finishing process, is widely used in the production of components of the highest quality in terms of form accuracy, surface accuracy and integrity. Development and implementation of complex surface depend on ultra-precision machining methods of complex curved parts. Ultra-precision cutting, grinding, polishing, non-traditional machining and compound machining method are reviewed and compared in terms of finishing accuracy, inosculation between tool and curved surface, efficiency and cost, and environmental friendliness. The probable further trend of ultra-precision machining technology of complex curved surface is forecasted. It is pointed out that complex curved surface machining with high efficiency, high precision, low cost, and sustainability are the trend in ultra-precision machining in the future.

Key words: complex curved parts, environmental conscious machining, high machining efficiency, ultra-precision forming, ultra-precision polishing