Structure for and method of electrical discharge machining
US5159167A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 1985 |
| Grant date | Oct 27, 1992 |
| Priority date | — |
| Expiry date | Mar 29, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23H9/14
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Structure for and method of electrical discharge machining with a wire electrode to produce small holes including completely controlling electrical discharge machining parameters such as voltage, reactance, current and servo speed with a programmable microprocessor, central processing unit sensing first sparking between the wire electrode and the workpiece and controlling depth of cut from the position of the electrode on spark initiation electrode feeding to replenish eroded electrode through clamping sequencing between an electrical discharge machine head and an electrode carrying slide thereon. In accordance with the invention there is also provided ultrasonic vibration of at least one of the workpiece, a wire electrode guide and the electrode during machining. Also, the slide is driven by a screw and nut combination including a plastic extruded between the screw and nut to remove backlash therefrom and the tapered end of the wire electrode is removed prior to electrical discharge machining therewith by machining with the tapered end of the electrode with a reverse polarity, that is with a high wear polarity, between the electrode and workpiece, and splitting of the wire electro…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.