With the improvement of research on the tooth surface and interface, the rock breaking
technology of a polycrystalline diamond compact (PDC) bit has witnessed significant ad-
vancements and widespread applications in various domains. However, the current research
on the tooth surface and interface is largely independent of each other, lacking integration
between the two. This study aims to explore the influence of the connection between the
tooth surface and interface on cutting efficiency and failure mechanisms during PDC bit
cutting operations. Six different mating structures are selected for analysis, and the cut-
ting process is simulated using Abaqus software in a consistent environment. The study
examined the crushing specific energy, stress distribution, cutting force and temperature
rise effect of different mating structures. Comparative analysis revealed that the efficiency
and failure mechanism of the cutter are influenced by the interface shape, both within the
same tooth shape and across different tooth shapes. Among the selected mating structures,
the saddle-tooth surface with a radial interface exhibited superior performance in all aspects
and demonstrated significant improvements. The findings provide a theoretical foundation
for the study of the mechanism behind PDC cutter mating structures.
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