| 摘要 |
A multi-spindle machine tool has a frame, a work spindle carrier and its rotatable work spindles indexably mounted on the frame, and a main drive shaft provided with a main brake and a main clutch. A plurality of clutches and selectively actuable to place the work spindles respectively into and out of driving engagement with the main drive shaft, and a plurality of selectively actuable brake devices are provided for the respective spindles. The arrangement is such that one or more of the work spindles can be arrested at a stage in a machining cycle by first disengaging the main clutch and applying the main brake so as to arrest all of the work spindles, and then actuating the appropriate ones of the clutches and brake devices so as to hold the appropriate work spindle or work spindles while the remaining work spindles are re-started. |
