The effect of cutting teeth number on the cutting force, surface roughness, tool wear rate and the
cutting chip shape characteristics is systematically evaluated. A novel five teeth chaser insert (C tool) which could
turn the workpiece at five cutting points simultaneously is involved in comparison with the standard triangle
shaped insert (T tool), in the purpose of solving the problems of cutting heat concentration and rapid tool failures
in the Inconel 718 machining process. Comparative orthogonal cutting experiments of the C tool and T tool show
that the cutting depth is the significant influencing factor of the cutting forces. Meanwhile, the five cutting teeth
of the C tool show the effectiveness of dispersing the cutting forces as well as improving the cutting efficiency. The
feed rate is the significant factor to affect the root-mean-square surface roughness (Ra) of workpiece machined by
the T tool, while the significant influencing variable of Ra for the C tool is the cutting depth due to its unique tool
geometry (0 ?rake angle) in the axial feeding process. Moreover, due to the dispersing effect, the cutting edges on
the C tool exhibits lower tool wear rate than that of the T tool under the same axial feed. The chips are regular
continuous long chips for the T tool, while the irregular continuous chips with the characteristic of saw-toothed
profile are obtained due to its unique 0?rake angle. The C tool shows the valid potential for effectively dispersing
the cutting heat and slowing down the tool wear rate in the Inconel 718 machining process.
LEI Xuelin *(雷学林), SHI Yukai (史玉凯), HE Yun (何云)
. Comparative Study on Cutting Performance of Chaser and Triangle-Shaped Inserts in Inconel 718 Turning[J]. Journal of Shanghai Jiaotong University(Science), 2019
, 24(3)
: 388
-394
.
DOI: 10.1007/s12204-019-2074-6
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