Research about Roughness for Mating Members of a Cylindrical Fine Fit after Turning with Small Cutting Feeds
Journal Title: RECENT - Year 2009, Vol 10, Issue 27
Abstract
In this paper the turning with small cutting feeds for a shaft and bore of a fine fit has been studied experimentally. It has been measured obtained roughness Ra, Rz, Rq and has been correlated with shape of chips and their plastic deformation. In range of very small cutting feeds, the plastic deformations have a much higher influence on roughness than for normal or great values of cutting feeds. In range of small cutting feeds, some disturbances ratio geometrical roughness appear because of phenomena from plastic deformation in cutting area. Also, appear elements of chips that make uneven into geometrical flutes generated by cutting tool and, thus, the measured value of roughness is non-uniform. Viewing under microscope of micro-asperities of surfaces allowed finding explanations about measured values of roughness parameters. It has been measured the roughness after turning with small cutting feeds for shaft and bore and these have been correlated with plastic deformation phenomena. They are presented microscopic images of surfaces and chips, calculated results and diagrams, tables with final results and diagrams of roughness depending on cutting feed values for small cutting feeds range. Conclusions will show the advantages and disadvantages of using small cutting feeds.
Authors and Affiliations
Cristina PASCU, Iulian POPESCU
Keywords
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