Rotating tool
US10239133B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 29, 2016 |
| Grant date | Mar 26, 2019 |
| Priority date | — |
| Expiry date | Mar 29, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23C2250/16
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A rotating tool includes a tool body which rotates around an axial line, four or more chip discharge grooves which are formed on an outer periphery of the tool body with gaps therebetween in a circumferential direction, and a plurality of cutting inserts which are arranged in multiple stages along the chip discharge grooves. In a cross-sectional view perpendicular to the axial line, when a center angle formed between a pair of virtual straight lines which connects each of the cutting edges of the cutting inserts disposed in a pair of chip discharge grooves adjacent to each other in the circumferential direction and the axial line to each other is defined as an angle, a plurality of angles formed around the axial line include one maximum angle (θmax), one minimum angle (θmin), and two or more angles other than the angle (θmax) and the angle (θmin).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.