Freeform turning lathe with direct drives and aerostatic bearing

Chao-liang Guan; Yi-fan Dai; Zi-qiang Yin; Fan Yang

doi:10.1117/12.830788

20 May 2009 Freeform turning lathe with direct drives and aerostatic bearing

Chao-liang Guan, Yi-fan Dai, Zi-qiang Yin, Fan Yang

Proceedings Volume 7282, 4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies; 728208 (2009) https://doi.org/10.1117/12.830788
Event: AOMATT 2008 - 4th International Symposium on Advanced Optical Manufacturing, 2008, Chengdu, Chengdu, China

Abstract

More and more precision freeform parts are required by defense technology and national economy today and in the future. The applications of freeform parts have traditionally conformed to the limitations imposed by practical limits on high effective fabricating technology. Single point diamond turning is one of the important methods of machining freeform surface parts. Generally speaking, optical freeform surfaces have complex geometrical surface shapes and require ultra smooth surface (roughness down to 10nm) and high form accuracy (form accuracy down to several ten nanometers). So, the ultra precision turning lathe must improve the motion accuracy, dynamic stiffness and bandwidth of every axis. Direct drive technology combined with aerostatic bearing do not affect by frication and eliminate the micro-backlash and creeping; reduce the number of transmission element, shorten the transmitted chains and be propitious to improve dynamic stiffness and bandwidth. This paper presents a ultra precision diamond turning lathe with linear motor and aerostatic guide drive system. Combined with the lathe a FTS (Fast Tool Servo) system driven by voice coil actor is use to machining free form surface. The turning experiments show that this lathe can satisfy the requirement of machine freeform surface.

Citation Download Citation

Chao-liang Guan, Yi-fan Dai, Zi-qiang Yin, and Fan Yang "Freeform turning lathe with direct drives and aerostatic bearing", Proc. SPIE 7282, 4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 728208 (20 May 2009); https://doi.org/10.1117/12.830788

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