Multi-flute ball end mill
US10160046B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 26, 2015 |
| Grant date | Dec 25, 2018 |
| Priority date | — |
| Expiry date | Feb 11, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23C2220/60
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A multi-flute ball end mill of the present invention includes: a shank portion configured to rotate about a rotational axis; a cutting edge portion; three or more ball edges formed on the cutting edge portion; gashes formed between the ball edges; peripheral cutting edges continuous with end portions of the ball edges on the shank portion side; and flutes formed between the peripheral cutting edges continuously with the gashes. The degree of curvature of the ball edges is 35% to 55%. Each of the gashes includes four faces of a rake face of each of the ball edges, a gash wall face, a first gash face, and a second gash face. The second gash face is formed such that the closer the second gash face is to the rotation center point, the more inwardly the second gash face enters a second face of each of the ball edges.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.