Wire drive apparatus in a wire-cut electric discharge machine
US4929809A · kind A · utility
Inventors
Key dates
| Filing date | Apr 13, 1989 |
| Grant date | May 29, 1990 |
| Priority date | — |
| Expiry date | Apr 13, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23H7/10
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A wire drive apparatus in a wire-cut electric discharge machine, which is capable of effecting wire extension smoothly even by a single drive source, and of preventing wear of belts and variation in wire feed speed. Upon wire extension, a lower belt section (3) pivotally supported through links (33, 34, 36, L) is moved toward an upper belt section (2) with actuation of air cylinders (10, 12), so that belts (21, 31) of these belt sections are brought in urged contact with each other, and a wire is delivered for the wire extension by the belts which are rotated, a wire drive roller (4). After completion of the wire extension, the lower belt section is moved to a position at which it is separated from the wire, and at this time the upper belt section is also separated from the wire, and power transmission from the wire drive roller to the lower belt section is disconnected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.