Multi-part dovetail repair broach assembly and methods of use
US6676336B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 13, 2001 |
| Grant date | Jan 13, 2004 |
| Priority date | — |
| Expiry date | Nov 14, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T407/1685
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The broach assembly includes alternate spacers and cutters arranged in a sub-assembly having a lead at a leading end and a lag at a trailing end. The cutters have side margins in excess of the margins of the spacers for cutting material from the dovetail slots of the turbine wheel as the broach assembly passes through the slots. The bottom or apices of each spacer and cutter are tapered to form a continuously tapered surface along the bottom of the broach assembly. Upon passing the broach assembly through the slot, the assembly is progressively displaced in a radial outward direction to progressively cut the active dovetail slot surfaces. Shims may be disposed in the bottom of the slot to further displace the broach assembly radially outwardly in multiple passes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.