タイトル（掲載誌）精密工学会誌/Journal of the Japan Society for Precision Engineering
一般注記This study provides an investigation of the cutting mechanisms and drilling characteristics of cemented tungsten carbide using a diamond-coated carbide drill under an ultrasmall feed rate. The thrust force, cutting edge shape, chip morphology, and drilled hole quality were evaluated. A diamond-coated carbide drill with two flutes, a diameter of 1.0 mm, and a coating thickness of 20 µm was applied. The thrust force was drastically decreased until the -10th drilling for various cutting conditions. Diamond coating flaking was only observed on the rake face immediately after the onset of cutting, and a sharp cutting edge was generated on the ridgeline of the diamond coating section on the flank face. The flaking region of the diamond coating on the rake face was extended from around the corner edge with increasing drilling number. The cutting performance was maintained until the -300th drilling, even though minimal flaking and chipping of the cutting edge also occurred on the flank face. The thrust force also sharply decreased when the diamond coating flaking around the chisel edge occurred. A sufficient inner surface integrity of the drilled hole was obtained, although the drilled hole diameter changed within the hole by transferring the contour of drill, which is flaking the diamond coating around corner edge and margin, to the drilled hole shape.
一次資料へのリンクURLhttps://u-fukui.repo.nii.ac.jp/?action=repository_action_common_download&item_id=24685&item_no=1&attribute_id=22&file_no=1
連携機関・データベース国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）