ドリル加工におけるドリル径の微小化に伴う刃先形状の影響

• 菅原 章

  正会員 東北大学科学計測研究所附属特殊精密工作研究施設

• 稲垣 耕司

  正会員 東北大学科学計測研究所附属特殊精密工作研究施設

書誌事項

タイトル別名

• The Effect of Shape of Tool Point with Dwindling of Drill Diameter on Drilling
• ドリル カコウ ニ オケル ドリルケイ ノ ビショウカ ニ トモナウ ハサキ
• Burr in the Case of 0.02% C Steel
• 0.02%C鋼における切残し

抄録

The effect of shape of tool point on the cutting-ability has been studied for various sized drilling. The ratio of chip-weight to the chip-weight plus burr-weight of a drilled part is defined for the cutting-ability; the higher ratio means the higher cutting-ability. 0.02% C steel was selected as the testing material and its thickness was adjusted to be equal to the drill-diameter in order to keep the shape of a drilled part same and compare the cutting-ability becomes worse with decrease of diameter, but it becomes better contrary with further decrease of the diameter. This phenomenon is independent of the drilling speed and of the condition of pre-heat-treatment of the testing material. The most outstanding finding in this work is that the improved cutting-ability in the case of very small diameter drills is not so deterrented even when their tool points are fairy dull. This fact suggests that a generally accepted drilling-mechanism is not applicable to the micro-drilling probably because of rather different plastic deformation due to its smallness of drilled-depth per one revolution and the smallness of drilled part. The difference in the plastic deformation seems to be the reason why a drilling with very small drills show a good cutting-ability with little burr.

収録刊行物

• 精密機械

  精密機械 44 (518), 179-184, 1978

  公益社団法人 精密工学会

詳細情報

• CRID: 1390001204764455040
• NII論文ID: 130003784382
• NII論文ID: 110001290344
• NII書誌ID: AN00130014
• DOI: 10.2493/jjspe1933.44.179
• NDL書誌ID: 1928762
• ISSN: 03743543
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I1928762
• 本文言語コード: ja
• データソース種別:
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  • NDL
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• 抄録ライセンスフラグ: 使用不可