HOBBING
Hobbing, or generation cutting, is a machining process for gear and pinion teeth particularly suited to large-scale production. Unlike form-copying cutting, hobbing generates the tooth shape through the continuous relative movement of the tool and the blank: the final profile results from the envelope of successive positions of the Milling cutter or hob. This principle ensures great regularity of the teeth and a conjugate profile favorable to smooth meshing, which limits friction and energy loss in the Train (wheel train). In watchmaking, cutting precision is crucial, as the slightest irregularity in the teeth results in jerks in the transmission and premature wear. Hobbing is now performed on numerically controlled machines, complemented by finishing and deburring operations ensuring the final quality of the wheels.
Useful link:
– The finishing train
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