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Coated toolwear behaviour in upand down millingat various chip lengths explained by the cutting edge impact loads

: Bouzakis, K.-D.; Katirtzoglou, G.; Bouzakis, E.; Makrimallakis, S.; Maliaris, G.

Journal of the Balkan Tribological Association 18 (2012), No.1, pp.58-68
ISSN: 1310-4772
Journal Article
Fraunhofer IPT ()

Milling operations for manufacturing dies and molds are commonly linked to complicated chip geometry and contact conditions between tool and workpiece. These parameters render the optimisation of the cutting conditions and the description of the tool wear difficult. In the described experiments, coated cemented carbide inserts fixed on a milling cutter were applied in down and up milling for monitoring the wear behaviour at various cutting edge entry conditions, which result in various chip lengths. The corresponding developed strain rates cause different film-substrate deformations and resulting loads. These phenomena were investigated with the aid of a new impact tester with adjustable impact force characteristics. The effective tool life up to a certain flank wear land width versus the cutting edge entry duration was explained and analytically described.