Tool holder in machining center

Metal working – Plural diverse manufacturing apparatus including means for... – Common reciprocating support for spaced tools

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Details

279 4, 279 75, 408239R, 409232, B23C 526, B23Q 3155

Patent

active

047456744

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.

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