Open AccessPerformance dynamics of pdc cutters used in breaking ductile brittle rock
Author(s) -
O.B. Trushkin,
Hamzja I. Akchurin
Publication year - 2021
Publication title -
nexo
Language(s) - English
Resource type - Journals
eISSN - 1995-9516
pISSN - 1818-6742
DOI - 10.5377/nexo.v34i04.12694
Subject(s) - breakage , brittleness , perpendicular , amplitude , leaps , bevel , structural engineering , tapping , geology , materials science , mechanics , mechanical engineering , engineering , composite material , physics , geometry , mathematics , optics , financial economics , economics
The widespread application of cutting - chipping action bits with PDC cutters is held back due to the intense chipping and breakage of the latter. This article presents the results of bench-scale tests conducted to determine the values of three mutually perpendicular components of the load on sharp-edged and beveled rock-breaking cutters of 13.5 mm in diameter as well as the dynamic-response factors and mean square deviations (MSD) of these components. The forces change in time by leaps, which reflects the rock fracturing under the cutter. The MSD accepted as per-cycle amplitude is four times as low on average as the mean axial force; when a sharp-edged and a beveled cutter is used, the MSD is by 150 to 300 and by 300 to 500 % lower than the mean circumferential force.