Drill having helical flute for discharging cutting fluid
US5478176A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 14, 1994 |
| Grant date | Dec 26, 1995 |
| Priority date | — |
| Expiry date | Sep 14, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T408/9097
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A metal cutting drill includes a shank having cutting edges at a front end and helical flutes extending rearwardly from respective cutting edges for conductive cutting fluid away from the front end. The cross-sectional area of each flute, as seen in a plane oriented non-perpendicular to an axis of rotation of the drill, becomes progressively smaller in a rearward direction. A helix angle defined by each flute becomes progressively smaller in the rearward direction. An angle formed between the plane and another plane oriented perpendicular to the axis equals the helix angle at the location where the planes intersect each other and the axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.