Wire-cut electrical discharge machine with electric shock preventer
US4880957A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 29, 1988 |
| Grant date | Nov 14, 1989 |
| Priority date | — |
| Expiry date | Nov 29, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23H7/02
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A wire-cut electrical discharge machine having a device for preventing an accident due to an electrical shock, wherein a guide roller (34a) disposed just before a collection box (38) for collecting a used electrode wire (30) passed through an electrospark machining area (36) is attached to a base plate (56) made of a conductive material, the base plate being fixed to a machine body (26) through an insulating plate (58), and a current leaking to the base plate caused by a disturbance of the running of the electrode wire is led to a safety circuit (50) through a lead wire (52), and a current leakage signal is output whereby an electric power supply of a electric power source (51) is rapidly stopped to prevent an accident due to an electric shock.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.