Metal working – Plural diverse manufacturing apparatus including means for... – Common reciprocating support for spaced tools
Patent
1990-09-24
1991-12-10
Howell, Daniel W.
Metal working
Plural diverse manufacturing apparatus including means for...
Common reciprocating support for spaced tools
279 75, 409233, B23C 526, B23Q 3157
Patent
active
050705920
ABSTRACT:
The present invention relates to a spindle unit of a machine tool in which tools changing is available and especially relates to a spindle unit by which a tool in a tool holder can be quickly and safely clamped and unclamped. This spindle unit is characterized in that an operating hole along with the centerline axis of a rotary spindle is provided therein for fixing (or clamping) a tool, a draw bar furnished with a cylindrical body along with the inner circumferential face of the operating hole is provided therein, the lower portion of the cylindrical body is formed on the inclination face of a wedge body, and a tool is clamped by guiding a ball by which the pull stud of a tool holder is engaged, along with the inclination of the inclination face of the wedge body, that is, by movement of the ball toward the center of the spindle, and is unclamped by the reverse movement of the ball.
REFERENCES:
patent: 4122755 (1978-10-01), Johnson
patent: 4745673 (1988-05-01), Araki et al.
patent: 4817267 (1989-04-01), Hitomi
Drucker William A.
Hokoku Machinery Co. Ltd.
Howell Daniel W.
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