Patent ID: 6726412
Filing Date: 2004-04-27
Classification: B23Q,Y10T

Abstract:
A tool holder for machine tool comprising:a tool holder main body (1) having a passage through-hole (e) at a rotating center part (X), a cutter (10) having a cutting fluid path (e5) which is inserted into an anterior part of said passage through-hole (e), and said cutter (10) being fixed on a tip of the tool holder main body (1) through a fixing means (3); wherein plural guiding grooves (d) parallel to a spindle direction on an inner peripheral surface of a through-hole (a3) at the rotating center part (X) of the tool holder main body (1), a tool driver (6) regulating relative rotation to said tool holder main body (1) and adjusting front and rear positions by sliding along the spindle direction is incorporated, a partial passage through-hole of a part of the passage through-hole (e) is formed to the rotating center part (X) of the tool driver (6), a cylindrical male surface part for sealing (10b) is formed at a rear-outer peripheral part of the cutter (10), a male surface part for regulating rotation (10a) comprising plane surface bodies which a fixed range of a peripheral surface is cut is formed at a front side of the cylindrical male surface part for sealing (10b), half-moon shaped plane parts (j) are formed at a front edge of the male surface part for regulating rotation (10a), a cylindrical female surface part for sealing (e3a) to seal up the cylindrical male surface part for sealing (10b) of the cutter and a fitting female part (e3b) regulating relative rotation by fitting the plane surface bodies of the male surface part for regulating rotation (10a) are formed to a front-inner peripheral part of the partial passage through-hole of the tool driver (6), a barrier surface (k) of the fitting female part (e3b) is contacted to the half-moon shaped plane parts (j) to regulate a longitudinal relative displacement, a ring groove (h) is formed on an inner peripheral surface of the cylindrical female surface part for sealing (e3a), and a ring-shaped packing (12) for sealing an annular clearance between the cylindrical male surface part for sealing (10b) and the cylindrical female surface part for sealing (e3a) is fitted into the ring groove (h).