Creation of Microgroove with Two Flat-ends for Hard Materials

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  • 高硬度材料への両端マイクロ止り溝創成
  • コウコウド ザイリョウ エ ノ リョウタン マイクロ トマリミゾ ソウセイ

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High performance and miniaturization are strongly demanded for optical elements and precision parts, where microgrooves play an important role. A non-rotational cutting tool is one of machining means to create microgrooves. However, even non-rotational cutting tool forms slopes at the cutting start and end points, which deteriorate the optical performance. In optical elements and precision parts, the creation of two flat-ends microgroove is expected, where two flat-ends microgrooves mean microgrooves having no slopes at the cutting start and end points. The method to create two flat-ends microgroove has already been devised and applied for soft materials, not for hard materials. In the study, a new method is proposed to create straight and curved microgrooves with two flat-ends for hard materials by indenting and feeding a non-rotational cutting tool. From experimental results, it is found that the proposed method has the potential of creating two flat-ends microgrooves for hard materials.

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