Drilling tool and throw-away tip for use in drilling work
US6238151A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 27, 1999 |
| Grant date | May 29, 2001 |
| Priority date | — |
| Expiry date | Aug 27, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T408/9097
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A drilling tool including a substantially columnar tool body rotatable about an axis, the tool body having a chip discharge groove formed in the outer periphery thereof opened at a distal end surface of the tool body; and a cutting edge having a rake face and extending from an end adjacent to the axis toward the outer periphery of the tool provided along a crossing ridge between a wall surface of the chip discharge groove facing in a circumferential direction of the tool and the distal end face. In the drilling tool, a concave surface rises in the circumferential direction of the tool with respect to the rake face of the cutting edge, the concave surface forming a concave curve advancing toward the distal end face of the tool in the circumferential direction of the tool, the concave surface being formed between the crossing ridge and the distal end face.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.