Device for the manufacture of gear wheels for low noise gearings

Gear cutting – milling – or planing – Gear cutting – Gear tooth shape generating

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Details

B23F 522

Patent

active

044498691

ABSTRACT:
A gear cutting machine is provided with gearing providing additional inaccuracies to superimpose the additional inaccuracies over the normal or residual gear cutting inaccuracies of the machine. The resultant errors cut into the gears provide gears having desired noise characteristics. The additional inaccuracies are of a higher frequency than the residual errors so that noise above the audible frequency range is provided by the gears so cut. The gear cutting machine has gearing for driving the hobbing spindle and for indexing a rotary table through worm gearing. The spindle drive gear and the worm drive gear are provided with eccentric sockets for introducing the additional inaccuracies. The drive gears also are provided with deformable portions providing the drive gear teeth so that the drive gears may be deformed into polygons. The eccentric sockets and polygonal drive gears are retained in position on the shafts that they drive by a nut and intermediary element.

REFERENCES:
patent: 915923 (1909-03-01), Zimmermann
patent: 2996958 (1961-08-01), Mente
patent: 3653290 (1972-04-01), Hunkeler

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