Positional Accuracy of Hole in Drilling : Effect of Rigidity and Point Geometry of Drill

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概要

• 論文の詳細を見る

• Hole positional accuracy, which is important in drilling operations with automated machine tools, e.g. NC machining-centers, is examined by a special runout device. Positional deviation of a drilled hole from the spindle rotating axis is mostly determined at the beginning of penetration. This deviation is caused by the deflection of tool rotating axis around a certain point on chisel edge. The experimental results indicate the drill overhang length has a significant influence on the hole positional accuracy. A fine feed in start of drilling and a spiral type of drill point grinding are effective to reduce such deviation. Stub tooling system, which gives a strong bending rigidity of tool, is a desirable technique to improve the positional accuracy in drilling operations.

• 一般社団法人日本機械学会の論文

著者

• SAKUMA Keizo

  Faculty of Engineering, Kyushu University

• Sakuma Keizo

  Faculty Of Engineering Kyushu University

• Morita Hidenori

  Nippon Steel Co.

• KIYOTA Hiroshi

  Faculty of Engineering, Kyushu University

• Kiyota Hiroshi

  Faculty Of Engineering Kyushu University

関連論文

• Study on Deep-hole-drilling with Solid-boring Tool : The Burnishing Action of Guide Pads and Their Influence on Hole Accuracies
• Positional Accuracy of Hole in Drilling : Effect of Rigidity and Point Geometry of Drill

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