| 摘要 |
PURPOSE:To perform the work of lathe turning and hobbing required for the work of machining a pinion with the same automatic machine, by both synchronously rotating the three of hob cutter spindle, work spindle and trim spindle with the same drive source and traversing a hobbing device. CONSTITUTION:After a completion of the machining work of lathe turning, a headstock 10, to feed out a work in accordance with the machining work of hobbing, is slightly forwarded in a state of holding the work, while the free end part of a lathe turning work is press contacted and supported to a stopper trim of a trim device 13 already standing ready at a certain position. Simultaneously, a motor for driving a main spindle 11 is stopped, a clutch on the main spindle 11 is switched to a clutch 35 and then the rotating motion of a lathe turning cam shaft 15 is stopped. Then electromagnetic clutches 17, 18 for performing the change-over operation of lathe turning and gear cam shafts 15, 16 are inversely actuated respectively to both rotate the gear cam shaft 16 and start a motor 24, then a hob cutter spindle 25, main spindle 11 and a trim spindle 50 are synchronously rotated. Further a hob cutter is transversely moved to apply the machining of hob tooth cutting. |
