A Study on the Ductile Mode Cutting of Lithium Niobate

This paper describes the cutting characteristics of lithium niobate, which is used for surface acoustic wave type micropumps, regarding the formation of micro grooves by direct cutting. Since lithium niobate is a brittle material with a strong crystal orientation dependency, significant differences were observed in the characteristics of the finished surface according to different directions of cutting. The ductile mode cutting of lithium niobate was found to be feasible with cutting depths of approx. 5 μm or less. Also, results of the study show the feasibility of the formation of minute grooves through the cutting of lithium niobate, using milling with an end mill.

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Evaluation of finished surface of cemented carbide by direct cutting using diamond-coated carbide end mill

Procedia CIRP ◽

10.1016/j.procir.2018.08.234 ◽

2018 ◽

Vol 77 ◽

pp. 114-117 ◽

Cited By ~ 2

Author(s):

Masato Okada ◽

Reiji Suzuki ◽

Atsuyuki Kondo ◽

Hidehito Watanabe ◽

Takuya Miura ◽

...

Keyword(s):

Cemented Carbide ◽

End Mill ◽

Finished Surface ◽

Direct Cutting ◽

Coated Carbide

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Demonstration of ultraprecision ductile-mode cutting for lithium niobate microring waveguides

Japanese Journal of Applied Physics ◽

10.7567/jjap.55.110304 ◽

2016 ◽

Vol 55 (11) ◽

pp. 110304 ◽

Cited By ~ 4

Author(s):

Ryo Takigawa ◽

Eiji Higurashi ◽

Tetsuya Kawanishi ◽

Tanemasa Asano

Keyword(s):

Lithium Niobate ◽

Ductile Mode ◽

Ductile Mode Cutting

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Effect of Tool Rake Angle and Crystal Orientation on Ductile Mode Cutting of Hard/Brittle Materials

International Journal of Automation Technology ◽

10.20965/ijat.2020.p0253 ◽

2020 ◽

Vol 14 (2) ◽

pp. 253-259

Author(s):

Abdallah Abdelkawy ◽

Masahiko Yoshino ◽

Yuki Nakagawa ◽

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Keyword(s):

Cutting Force ◽

Cutting Forces ◽

Crystal Orientation ◽

Rake Angle ◽

Specific Cutting Force ◽

Soda Glass ◽

Ductile Mode ◽

Ductile Mode Cutting ◽

Cutting Model ◽

Cutting Direction

The effects of negative rake angles on the ductile mode cutting of soda glass and sapphire were studied. In addition, the machining mechanism was studied using a groove-cutting model based on the orthogonal cutting theory. It was found that the specific cutting forces in ductile mode cutting increase on both the soda glass specimen and on the sapphire specimen when the rake angle of the tool becomes negative. The difference between the experimental data and theoretical data of the specific cutting forces becomes large when the tool has a high rake angle on the negative side. This is attributed to effects of the roundness of the edge, the effects of the roundness of the nose, and the plowing mechanism, which causes plastic flow of the work material to both sides of the groove. The specific cutting force of sapphire depends on the cutting direction against the crystal orientation. The specific cutting force of sapphire depends on the cutting direction in terms of the crystal orientation. The anisotropy of the cutting force of sapphire also depends on the rake angle of the tool.

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