| 摘要 |
PURPOSE:To aim at automation in application and positioning for a center rest device, by letting the center rest device shift to a flat part judged out of a memory of a work flat part table and positioning it thereat when work's overall length is judged as being more than the specified value to the diameter. CONSTITUTION:In time of machining, a main control part 2 calls a machining program PRO out of a machining program memory 7 and outputs it to a mechanism performance control part 10, while this control part 10 drives and controls a tool rest 13 and a spindle 12, but when such machining as using a center rest device 11 is instructed in a certain machining job, the main control part 2 drives and controls this center rest device 11 and positions this device 11 at the specified position. Next, when use of this center rest device 11 is not instructed, the main control part 10 operates and judges it from a diameter D and overall length L of a work blank, and when L>aD is judged so, the center rest device 11 is used whereby chattering to be produced during operation is effectively restrained so that highly accurate machining is securable. |
