This paper describes a new method of microtexture generation in precision machining through self-excited vibrations of a diamond cutting tool. Conventionally, a cutting tool vibration or chatter is detrimental to the quality of the machined surface. In this study, an attempt is made to use the cutting tool's self-excited vibration during a cutting beneficially to generate microtextures. This approach is named as “controlled chatter machining (CCM).” Modal analysis is first performed to study the dynamic behavior of the cutting tool. Turning processes are then conducted by varying the tool holder length as a means to control vibration. The experimental results indicate that the self-excited diamond cutting tool can generate microtextures of various shapes, which depend on the cutting tool shank, cutting speed, feed, and cutting depth. The potential application of this proposed technique is to create microtextures in microchannels and microcavities to be used in mass and heat transfer applications.
Microtexture Generation Using Controlled Chatter Machining in Ultraprecision Diamond Turning
Contributed by the Manufacturing Engineering Division of ASME for publication in the JOURNAL OF MICRO- AND NANO-MANUFACTURING. Manuscript received August 17, 2014; final manuscript received January 12, 2015; published online February 20, 2015. Assoc. Editor: Gracious Ngaile.
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Ahmed, S. A., Hoon Ko, J., Subbiah, S., and Hock Yeo, S. (June 1, 2015). "Microtexture Generation Using Controlled Chatter Machining in Ultraprecision Diamond Turning." ASME. J. Micro Nano-Manuf. June 2015; 3(2): 021002. https://doi.org/10.1115/1.4029610
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