Method for drilling hollow components
US6362446B1 · kind B1 · utility
24Cited by
12References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 2, 1999 |
| Grant date | Mar 26, 2002 |
| Priority date | — |
| Expiry date | Aug 2, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23P2700/06
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An apparatus for drilling cooling holes through a wall of a hollow component is disclosed. First, a laser drill is used for drilling at least one rough blind hole within a component wall, for example a turbine airfoil, so as to retain a residual bottom plate portion. Next, an electro discharge machine (EDM), for example a rotating EDM or plunge EDM, is used for finishing at least one rough blind hole so as to create at least one finished hole and breaking through the bottom plate portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.