Wire cut electrical discharge machining apparatus
US5306889A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 15, 1993 |
| Grant date | Apr 26, 1994 |
| Priority date | — |
| Expiry date | Apr 15, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23H7/20
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An apparatus for a wire cut electrical discharge machine for preventing breakage of the wire electrode during machining, and thereby increasing machining performance. Since wire electrode breakage accidents during machining are often the result of a concentration of spark discharges in the machining area, the present invention controls machining conditions to prevent wire electrode breakage by detecting any continuous generation of spark discharges in a specific zone of the machining zone and discriminating normal concentration phenomenon from a truly bias sparking condition based on the position of the detected sparks. Appropriate control over the machine or machining conditions to relieve the problem may be exerted in response to a detected biased spark discharge condition. A biased spark discharge condition is detected and discriminated when spark discharges continue to occur within a set bias area, defined as a predetermined area which is set around the position of a spark discharge. If subsequent spark discharges are detected outside the bias area, then a non-biased state is determined and a new bias area is set. Thereafter, this procedure is repeated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.