Disposable hob and method of grinding the same

Details Disposable hob and method of grinding the same Disposable hob and method of grinding the same

1990-06-14

1991-07-23

Schmidt, Frederick R.

Abrasive tool making process, material, or composition

Impregnating or coating an abrasive tool

51287, 407 23, B23F 2116

Patent

active

050332392

ABSTRACT:
A hob for cutting gear teeth includes a plurality of generally axially extending and generally circumferentially spaced rows of teeth. The hob is adapted to be thrown away instead of being re-sharpened when the cutting edges of the teeth become worn. Consistent with this, the teeth--rather than being formed with a conventional re-sharpenable profile--are ground so that the tip, the side flanks and the root of each tooth are of a circumferentially concave shape. The grinding is effected by a unique positional mode in which the hob blank is held stationary and in which the grinding wheel is located relative to the blank in such a manner as to enable the use of a wheel of the largest possible diameter for the design criteria of the particular hob being formed.

REFERENCES:
patent: 1648470 (1927-11-01), Anderson
patent: 1659226 (1928-02-01), Wildhaber
patent: 1669887 (1928-05-01), Wildhaber
patent: 1778541 (1930-10-01), Wildhaber
patent: 2112455 (1938-03-01), Edgar

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