6533b872fe1ef96bd12d2e89
RESEARCH PRODUCT
Tribology of Metal Cutting
Wit Grzesiksubject
Materials sciencePlane (geometry)Mechanical engineeringEdge (geometry)Flow stressTribologyMaterial flowCoulomb's lawStress (mechanics)symbols.namesakeMachiningsymbolsForensic engineeringMetal cuttingdescription
This chapter provides comprehensive knowledge regarding tribological behaviour of the cutting zone and characterizes specific features of the tool–chip contact that influence friction mechanisms in this area. Adhesion, plastic deformation of contacting asperities and ploughing action of the cutting edge are selected as three predominant mechanisms controlling sliding friction between the tool and the chip. The two-zone model of the tool–chip contact distinguishing seizure and sliding regions is characterized, along with experimental evidence based on photoelastic and material flow line techniques. Corresponding stress distributions for plane and restricted-contact cutting tools are provided, and relevant friction models of friction are derived. The friction models considered cover force-based and flow stress-based relationships, allowing the prediction of friction coefficient for given machining conditions. The experimental techniques, applied devices and procedures are outlined. Some advanced constructions of tribometers are presented.
year | journal | country | edition | language |
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2008-01-01 |