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A study on optimal cutting conditions of MCD or NCD coated ball end-mills for finishing  

Jong-Su Kim (Korea Institute of Industrial Technology, Research Institute of Advanced manufacturing & materials Technology)
Publication Information
Design & Manufacturing / v.16, no.4, 2022 , pp. 17-23 More about this Journal
Abstract
Recently, several studies are being conducted to achieve a curvature of 180° or more for the edge of the display glass. The thermocompression molding process is applied to the manufacture of curved glass, and high hardness G5 graphite is used as the mold material to withstand the impact applied to the mold. G5 graphite has high hardness and strong brittleness, which makes tool wear and surface damage easy during machining. Therefore, the demand for diamond-coated tools with good mechanical properties is increasing in the G5 machining field. In this study, the optimal cutting conditions and machinability of a nanodiamond (NCD) coated ball end mill being developed by a tool manufacturer were analyzed and evaluated. For this purpose, the same test was performed on the microdiamond (MCD) coated ball end mill and compared together. In summary, the machinability of MCD and NCD coated tools showed better cutting performance at a cutting speed of 282 m/min, a feed rate of 1,400 mm/min, and a radial depth of cut of 0.08 to 0.1 mm.
Keywords
Ball end-mill; Machinability; MCD; NCD; Optimal cutting conditions;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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