| 摘要 |
PURPOSE:To considerably simplify the construction of a power transmission system by performing the change-over operation of an electromagnetic clutch on a worm shaft on the basis of a change-over signal obtained from one of the cam shafts and rotating the other cam shaft. CONSTITUTION:At a completion of the work of lathe turning, a limit switch 61 is operated in accordance with the stop motion of a main spindle 11 to break an electromagnetic clutch 17 at the side of a lathe turning cam shaft 15. Simultaneously an electromagnetic clutch 18 at the side of a gear cutting cam shaft 16 is engaged, then the gear cutting cam shaft 16 is driven rotating instead of the lathe turning cam shaft 15 through a transmission system of clutch unit 22, belt 79, electromagnetic clutch 18, worm shaft 77 and the like. This driving motion causes the three of hob cutter spindle 25, main spindle 11 and trim spindle 50 to be synchronously rotated simultaneously the hob cutter spindle 25 is traversed to perform the machining work of prescribed hobbing. |
