The Distribution of Cutting Resistance along Both Cutting Edges of a Twist Drill

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  • ドリル刃先の切削抵抗の分布
  • ドリル ハサキ ノ セッサク テイコウ ノ ブンプ

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Abstract

Some researches have already been made about the distribution of cutting resistance along the cutting edges of a drill; but all of them have treated the problem under the assumption of the symmetrical cutting conditions, and the radial component of the cutting resistance cannot be obtained from the thrust and torque of a drill alone. In the actual drilling operations, the two cutting edges of a drill do not cut symmetrically; and in the present research, we tried to obtain the distribution of the three components of the cutting resistance along the two cutting edges of a drill by measuring the lateral flexure of it during the drilling operation.

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