Current supply device for movable electrodes of spark erosion machines
US4900889A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 15, 1989 |
| Grant date | Feb 13, 1990 |
| Priority date | — |
| Expiry date | Feb 15, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23H7/10
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A current supply device for movable electrodes of spark erosion machines comprises a plurality of individual contacts and includes in leads connecting the contacts with a current generator, electrical components in the form of pulse transformers for a pairwise negative feedback of partial currents or additional impedances stepped according to a mathematical series for uniform current distribution over the individual contacts. The current supply device is particularly suitable for the current transmission of high energy short pulses, such as are used for an erosive wire cutting. The current supply device operates in an almost wear-free manner and can also fulfill the function of guide for the electrode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.