三次元旋削によるねじれみぞタップの研究

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書誌事項

タイトル別名
  • Research on the Spiral Fluted Tap by Three Dimensional Turning
  • 3ジゲンシサク ニ ヨル ネジレミゾタップ ノ ケンキュウ

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説明

For analytical research on the spiral fluted tap, the present writer made an experiment by three dimensional turning, i.e., the end-turning of a cylinder having a small thickness with an inclined tool edge to which a chip breaker like the flute of the tap was attached. Three components of cutting force were measured by means of wire strain gauges which were sticked on the bite shank, and the maximum tapping torque was calculated by putting these components in an analytical formula of tapping torque he derived. In conclusion, it was considered that the tapping torque is lowest at 8∼10° for right spiral and 13∼15° for left, due to the increase in ability of flow of chips and decrease in action of chip breaking.

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