Combined bore seat face grinding, EDM and lapping method for finishing fuel injector nozzle bodies
US4721839A · kind A · utility
8Cited by
8References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 22, 1986 |
| Grant date | Jan 26, 1988 |
| Priority date | — |
| Expiry date | May 22, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23H5/00
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A combined grinding and EDM apparatus has an indexable rotary turret with four work heads secured thereon to locate a pair of nozzle body blanks with their longitudinal axes in spaced parallelism; and either three or four compound cross and longitudinal slide assemblies carrying grinding tools, lapping tools or non-contact machining tools which work on the blanks to machine the face and to form a valve guide bore and a valve seat shaped as a frustrum of a cone whose axis is concentric with the bore, the valve seat cone surface having a small end diameter to large end diameter ratio in the order of 1-50.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.