Abstract
Through theoretical analysis and finite element simulation experiments, this paper proposes an optimal design method for the structural parameters of ceramic tools with variable cross-sections. On this basis, the tool angles of Si3N4-based ceramic tools for cutting inconel 718 high-temperature alloy are investigated, including rake angle γ0 = −5°, clearance angle α0 = 5°, cutting edge inclination λs = −2°, cutting edge angle Kr = 45°. By comparing the main cutting force, temperature and chip-breaking effect of flat face and three different groove ceramic tools, it is found that straight chip breaker has the most obvious optimization effect, main cutting force is 14.5% lower than that of the flat face, the temperature is reduced by 10.2%, and radius of chip curl curvature is the smallest, which is easy to break chips.
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