Insert-exchangeable, rotary tool and throwaway insert
US6884006B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 22, 2002 |
| Grant date | Apr 26, 2005 |
| Priority date | — |
| Expiry date | Feb 11, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T407/23
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An insert-exchangeable, rotary tool to which throwaway inserts are detachably attached, the insert comprising substantially square-shaped face and bottom surface and an outward curved flank on each side surface, and having a positive-type shape in which an outward curved edge line formed by the face and the flank serves as a cutting edge; each flank having in a substantially center portion a flat surface portion extending to the bottom surface without contacting with the cutting edge; a major cutting edge formed by the outward curved edge line circularly extending from its lowermost point toward a periphery of the tool when the insert is attached to the insert-exchangeable, rotary tool, such that it has a negative radial rake; and the lowermost point being positioned inward a center of the outward curved major cutting edge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.