Cutting insert and boring tool
US11040404B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 13, 2019 |
| Grant date | Jun 22, 2021 |
| Priority date | — |
| Expiry date | Sep 13, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23C2200/28
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A cutting insert has a seating surface, an outer peripheral surface, a top surface, and an attachment hole. The cutting edge includes a curved cutting corner edge portion, a first cutting edge portion, and a second cutting edge portion. The top surface includes a first rake face contiguous to the first cutting edge portion, a second rake face contiguous to the second cutting edge portion, and a third rake face contiguous to the cutting corner edge portion and also contiguous to the first and second rake faces. The third rake face has a first region contiguous to the first rake face and a second region contiguous to the second rake face. The first rake face and the first region each have a rake angle which is a positive angle. The second rake face and the second region each have a rake angle which is a negative angle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.