Flow formed gear
US8042370B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 7, 2007 |
| Grant date | Oct 25, 2011 |
| Priority date | — |
| Expiry date | Feb 7, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49471
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of forming a ring gear from a ring blank includes providing a mandrel having a central axis and an outer annular forming surface. The outer annular forming surface defines a plurality of forming elements having a forming element axis offset from the central axis of the mandrel. The ring blank has a ring axis and is placed over the mandrel generally aligning the central axis of the mandrel with the ring axis of the ring blank. A roll is provided having a roll axis that is generally parallel with the element axis. The roll is forced radially inwardly while circumscribing the central axis. The roll pivots around the roll axis deforming the ring blank radially inwardly forming teeth on an inner surface of the ring blank that coaxial with the element axis and offset from the mandrel axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.