| 摘要 |
Disclosed herein is a workpiece ejecting device for a machine tool, in which the ejecting bar cannot be rotatably driven at the time of high velocity rotation of the spindle to thereby prevent occurrence of vibration, noise and frictional heat owing to the movement of the spindle, so that the machined workpiece can be ejected smoothly. According to the first embodiment of the present invention, there is provided a workpiece ejecting device for a machine tool for ejecting a workpiece clamped to a chuck (16) installed at a spindle (14) by means of a drawing tube (18) connected to a chucking cylinder (22), the workpiece ejecting device comprising: a front bearing unit (50) installed at an inner peripheral surface of a front end portion of the drawing tube to support the rotation of the drawing tube; and an ejecting cylinder (23) located behind the chucking cylinder (22) and installed directly on an axial line identical with that of the front bearing unit (50), and having an ejecting rod (20), wherein the ejecting rod is provided at a center axis thereof with at least one fluid passing (20a) opening through which fluid for removing alien materials is supplied, and a front end of the ejecting rod is installed to be supported by the front bearing unit (50). |
