TWIST DRILL WITH LONG LIFE AND EASY CUTTING
개요
발명자
Ning JIANG
IPC 분류
CPC 분류
A twist drill with long life and easy cutting, is provided with a vertical discharge chute on a major cutting edge. The cutting part of the twist drill comprises a major cutting edge, a side cutting edge, discharge chutes and a back chute ridge, the left side of the major cutting edge is provided with the side cutting edge, the discharge chutes comprise a vertical discharge chute and a horizontal discharge chute, the vertical discharge chute is arranged on the major cutting edge, the horizontal discharge chute is arranged on the side cutting edge, the horizontal discharge chute and the vertical discharge chute are interconnected, the fluting angle of the vertical discharge chute is perpendicular to the edge of the back chute ridge, and a horizontal discharge chute is added on the side of the major cutting edge, which is originally provided with a discharge chute at the drill tip.
원문 (중국어)
A twist drill with long life and easy cutting, is provided with a vertical discharge chute on a major cutting edge. The cutting part of the twist drill comprises a major cutting edge, a side cutting edge, discharge chutes and a back chute ridge, the left side of the major cutting edge is provided with the side cutting edge, the discharge chutes comprise a vertical discharge chute and a horizontal discharge chute, the vertical discharge chute is arranged on the major cutting edge, the horizontal discharge chute is arranged on the side cutting edge, the horizontal discharge chute and the vertical discharge chute are interconnected, the fluting angle of the vertical discharge chute is perpendicular to the edge of the back chute ridge, and a horizontal discharge chute is added on the side of the major cutting edge, which is originally provided with a discharge chute at the drill tip.