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US 2019/0168316 A1Published application
Drill and drilling device including the same
AssigneeMitsubishi Heavy Industries, Ltd.
InventorShuichi OKADA
Life of this patent
Estimating the term…
Abstract
Provided is a drill that can drill with good accuracy without over-processing during deburring. The drill includes: a drill main body that is rotated around a central axis; a main cutting edge provided at a leading end of the drill main body; and a deburring cutting edge that is provided on a base end side of the drill main body, adjacent to the main cutting edge, and performs deburring. The deburring cutting edge is similar in diameter to the main cutting edge and has an angle (β) smaller than an angle (α) formed by the main cutting edge relative to the central axis.
Claims4
A drill comprising:
- a drill main body that is rotated around a central axis;
- a main cutting edge provided at a leading end of the drill main body;
- and
- a deburring portion that is provided on a base end side of the drill main body, adjacent to the main cutting edge, and performs deburring, wherein
- the deburring portion is provided with a deburring cutting edge that is similar in diameter to the main cutting edge and has an angle smaller than an angle formed by the main cutting edge relative to the central axis.
2 more elements
A drill comprising:
- a drill main body that is rotated around a central axis;
- a main cutting edge provided at a leading end of the drill main body;
- and
- a deburring portion that is provided on a base end side of the drill main body, adjacent to the main cutting edge, and performs deburring, wherein
- the deburring portion has a tapered surface of which a diameter decreases in a direction away from the main cutting edge.
2 more elements
Dependencies are inferred from the claim text.