Method for drilling a stack of materials, drill bit and drilling device
US9649699B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 19, 2015 |
| Grant date | May 16, 2017 |
| Priority date | — |
| Expiry date | May 19, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23B2265/12
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method for drilling through an assembly forming a stack of at least two different materials uses a drill bit having at least a first cutting edge and a second cutting edge inclined in an axial plane of the drill bit so that the end of the drill bit has a projecting conical shape. The first cutting edge is configured to drill a first material. The second cutting edge is made differently from the first cutting edge, to drill a second material. A first rotational drive axis of the drill bit is laterally offset during the drilling by an offset distance D relative to the axis of the drill bit in a direction opposite the first cutting edge when the drill bit is drilling through the first material, and alternately, in a direction opposite the second cutting edge when the drill bit is drilling through the second material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.