Tool holder in machining center
US4745674A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 23, 1985 |
| Grant date | May 24, 1988 |
| Priority date | — |
| Expiry date | Jul 23, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T483/1864
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A tool holder in a machining center comprising a basic tool holder provided with a tapered fitting hole formed on the nose portion and a small tool having its tapered fitting portion fitted detachably in the tapered fitting hole, wherein a plurality of guide holes for protruding a locking ball are formed on a circumferential wall of the fitting hole, a recess for receiving the locking ball therein is provided on a nose outer peripheral surface of the basic tool holder on which the fitting hole is formed, and a piston actuated at all times toward a base end portion of the basic tool holder is provided slidably and wherein release means for releasing the small tool from being locked by shifting the piston toward a nose of the basic tool holder is provided between the piston and the basic tool holder, a pressure chamber is formed further between the piston and the basic tool holder, and a high-pressure air from a fluid pressure source is connected to each discharge port in the pressure chamber and the fitting hole through a fluid circuit provided with a directional control valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.