Core removing apparatus
US5164563A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 1991 |
| Grant date | Nov 17, 1992 |
| Priority date | — |
| Expiry date | Nov 18, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/222
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A core removing apparatus for removing cores from a workpiece upwardly or downwardly in dependence on the shape of each core cut out from the workpiece by means of wire-cut electric discharge machinng comprises a core removing unit (6) mounted on an electric discharge machine body. When a first operation mode is selected according to a code read from a program after a core (20) having an inverted trapezoidal shape in cross section is taper-machined, a core sucking section (16), fixed to the piston (15) of a vertical cylinder of the core removing unit, is brought in contact with the core by vertical movement and rotation of the piston, and the sucking section by which the core is sucked and held is moved upwardly to thereby pull out the core from the workpiece (19). Then, the core, moved to the outside of a core falling prohibition region by horizontal movement of the piston (13) of the horizontal cylinder, is disengaged from the core sucking section. When a second operation mode is selected according to another code associated with a core (20) of a trapezoidal shape in cross section, the core, held within the workpiece by the sucking section, is moved to a safety position at which …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.