Wire feed apparatus
US5094378A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 1990 |
| Grant date | Mar 10, 1992 |
| Priority date | — |
| Expiry date | Dec 19, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/9292
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A wire feed apparatus for a wire cut electric discharge machining apparatus, capable of moving a wire conveyor belt from an automatic wire extension position to a non-wire-transfer shunt position at the time of electric discharge machining, thereby preventing wear of the belts and reducing variation in the wire feed speed. The apparatus includes first and second conveyor belts selectively operated in accordance with predetermined conditions for wire feeding. At the time of automatic wire extension, an air cylinder of a wire feed mechanism is driven to move the second conveyor belt from a non-wire-transfer shunt position to the automatic wire extension position using a parallel link mechanism. The second conveyor belt is pressed against the first conveyor belt at the automatic wire extension position. When both these belts rotate as a motor is driven, a wire electrode held between the belts is transported from an upstream side of a wire transfer path to a downstream side thereof, whereupon the automatic wire extension is finished. When the air cylinder is de-energized, the second conveyor belt is restored to the non-wire-transfer shunt position and separated from the first conveyor …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.