Strategies for grinding of chamfers in cutting inserts

Strategies for grinding of chamfers in cutting inserts

Categories Zeitschriften/Aufsätze (reviewed)
Year 2014
Authors Denkena, B., Köhler, J., Ventura, C.E.H.:
Published In Precision Engineering 38 (2014), S. 749–758.

In order to increase tool life and improve workpiece quality, cutting processes with geometrically definedcutters demand inserts with a prepared cutting edge. Chamfers are widely used in many processes, sincethey can provide edge strengthening without damaging the chip flow. In order to achieve a stable andreliable cutting process, uniform chamfer geometry along the insert and high edge quality are necessary. For this, proper grinding strategies for chamfer manufacturing must be taken into account. Withthe objective of getting knowledge about the chamfer manufacturing process, strategies for grinding ofchamfers are investigated in this paper. Chamfers were ground on PCBN, mixed ceramic and cementedcarbide cutting inserts with a vitrified bond diamond grinding wheel. A single grain chip thickness modelis used to characterize the process and different grinding strategies are analyzed in terms of reduction ofchamfer geometry deviation. It was found that high insert rotational speeds increase the edge chippingand that the cutting insert material has a considerable influence on the chamfer geometry deviation.

DOI 10.1016/j.precisioneng.2014.04.002