Electric discharge machine having a balance device for balancing gravitational force acting on a vertically moveable quill
US6538227B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Oct 24, 2001 |
| Grant date | Mar 25, 2003 |
| Priority date | — |
| Expiry date | Oct 24, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23H7/30
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An electric discharge machine having an electrode mounting device (42) for mounting a tool electrode, a quill (41) movable in the vertical direction and having the tool mounting device attached to a lower end, at least two linear motor movers (43, 44) attached to the quill and disposed symmetrically about the central axis of the quill, at least two linear motor stators (31, 32), each disposed opposite one of the at least two movers, and a balance device (6) for balancing a gravitational force acting on the quill. The balance device has an air cylinder (60) arranged coaxially with the quill so that a balance force having a force vector aligned with the central axis of the quill is generated. The air cylinder is preferably mounted in a hole formed in the center of the quill and extends in a vertical direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.