(under subclass 20) Device adapted to turn about an axis, including at least three radially outwardly directed teeth positioned spirally about the device, each tooth including a cutting edge formed by intersecting planes one of which is generally parallel to and radiates from the axis and serves to direct a chip formed by the cutting operation, which device is intended to form the integrating elements on a body by "hobbing".
(1) Note. Forming a gear by "hobbing" involves a complex relationship between a workpiece* and a cutter* wherein the cutter is rotated at a first rate and wherein the workpiece is moved to cause the intermeshing elements to traverse the cutter at a second rate; wherein the cutting action of the cutter on the workpiece is such that the entire surface for rolling contact of the intermeshing elements is generated by a series of chip removing actions made by the cutting edges of the cutter; and wherein all the intermeshing elements of the gear body are generated as a continuous operation.
SEE OR SEARCH CLASS
409, Gear Cutting, Milling, or Planing,
11+, for a cutter for hobbing combined with drive structure or with work supporting structure.
