Combined wire electrode electrical discharge machine and initial hole forming device
US4711981A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 3, 1985 |
| Grant date | Dec 8, 1987 |
| Priority date | — |
| Expiry date | Dec 3, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23H7/02
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A wire electrode electrical discharge machine includes an initial hole forming device mounted on a frame unit attached to the vertical slider of the electrical discharge machine; the initial hole forming head is vertically movable on the frame unit and has a rotary chuck for holding a hollow bar electrode; electrical switches on the frame unit generate signals upon the detection of the initial hole forming head being position at an initial hole forming position and at a resting position in its vertical movement on the frame unit and lateral movement of the upper wire guiding unit toward the initial hole forming head is inhibited while the initial hole forming head is located at the initial hole forming position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.