| 摘要 |
PURPOSE:To successively perform the machining of an inner diameter and a front end surface, and the machining of an outer diameter and a back end surface by means of the same chuck by providing a chuck claw and a work stopper near the periphery of a chuck main body, while providing a collet chuck and another work stopper in the center thereof. CONSTITUTION:When the back end of a work abuts to a work stopper 30 in an advanced state and an advancing/retreating shaft 7 advances, an oscillating body 2 advances, a pin 5 abuts to the back end of a slot 4, an oblique surface 12 pushes a sliding element 13, to force oscillating body 2 to turn around the pin 5, and a chuck claw 3 holds the work. After machining the front end surface and hole of the work, a loader claw temporarily holds the work, the advancing/retreating shaft 7 retreats, to open the chuck claw 3. And then, an air pressure is applied to a cylinder 41 so that a piston 43 and a work stopper 44 many advance, while the air pressure is applied to another cylinder 26 so that a piston 27 and the work stopper 30 may retreat. And next, the work moves toward a collet chuck 33 by means of the loader claw so that the hole of the work fits therewith, and further, an expander 35 retreats so that a collet 34 holds the work, and thereat, the loader claw releases its temporary hold, thereby an outer diameter and the back end surface are machined. |
