INNER DIAMETER CHUCKING UNIT FOR AUTOMATIC LATHE

WIPO Patent Application WO/2014/175476

A1

An inner diameter chucking unit for an automatic lathe, according to the present invention, is provided to the inside of a rotating body of an auxiliary head stock of an automatic lathe so as to chuck the inner diameter of a structure, and the chucking unit comprises: a sleeve which is provided to the inside of the rotating body rotating by the motor of the auxiliary head stock of the automatic lathe so as to be movable in the longitudinal direction, rotates with the rotating body, and has an inclined surface on the front end portion thereof; a collet chuck which is provided to the front end of the rotating body so as to protrude therefrom while surrounding the front end of the sleeve, has an inclined surface on the inside surface thereof, and chucks the inner diameter of the structure according to the movement of the sleeve; and an elastic member provided between the sleeve and the collet chuck so as to move the sleeve backwards, wherein a hollow part is provided to the inside of the sleeve such that a pipe is inserted from the rear end portion of the hollow part of the sleeve and air pressure or oil pressure supplied through the pipe is sprayed to the front end of the collet chuck through the hollow part of the sleeve so as to allow the structure to deviate away from the collet chuck.

CHOI WOO-KAK (KR)
WOO BONG-KEUN (KR)

PCT/KR2013/003481

October 30, 2014

April 24, 2013

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DAESUNG HI TECH CO LTD (KR)

B23B31/20; B23B13/12; B23B25/06

US20050082770A1	2005-04-21
JP2005231006A	2005-09-02
JPH1034411A	1998-02-10
JPH09174313A	1997-07-08
KR20100001228U	2010-02-03

BAE, In-Sam (KR)
배인삼 (KR)

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