Method of producing a mutli-apertured workpiece
US5539648A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 27, 1994 |
| Grant date | Jul 23, 1996 |
| Priority date | — |
| Expiry date | Oct 27, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M65/00
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of producing a multi-apertured workpiece such as a fuel injector comprising forming an aperture in a workpiece by EDM machining (10), supplying a calibrating fluid such as deionised water through the aperture from a reservoir (17) via a pump (18), measuring the flow and pressure through the aperture by transducers (19, 20) and comparing the results with a predetermined ideal, adjusting the EDM machine (10) in accordance with such comparison so as to compensate for the difference between the measured values and the predetermined ideal, forming a further aperture using the adjusted EDM machine (10) and repeating the preceding steps until the appropriate number of apertures has been formed. The apparatus may include CNC operation (14) and the comparison may be made by computer (15) linked to the CNC (14) for adjusting the EDM machine (10).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.