Methods and apparatus for generating control data for forming a tooth of a spur gear toothing by milling a workpiece at a machine tool

摘要

A disclosed example method for generating control data for forming a tooth of a spur gear toothing which has an intended widthwise crowning by milling a workpiece at a numerically controlled machine tool having at least 5 axes, at a universal machine tool, by successively moving a milling cutter of the machine tool along a plurality of machining paths based on the generated control data, involves providing a tooth flank geometry of at least one tooth flank of the tooth of the spur gear toothing. The method also involves determining parameters for specifying a change of the provided tooth flank geometry according to the intended widthwise crowing of the tooth. In addition, the method involves generating control data based on a tooth flank geometry which is changed based on the determined parameters, wherein the changed tooth flank geometry corresponds to a tooth flank geometry of the tooth having the intended widthwise crowing.

主权项

1. A method for generating control data for forming a tooth of a spur gear toothing which has an intended widthwise crowning by milling a workpiece at a numerically controlled machine tool having at least 5 axes by successively moving a milling cutter of the machine tool along a plurality of machining paths based on the generated control data, the method comprising:
providing a tooth flank geometry of at least one tooth flank of the tooth of the spur gear toothing, determining parameters, which include a plurality of shift parameters, for specifying a change of the provided tooth flank geometry according to the intended widthwise crowning of the tooth, each shift parameter being associated with one of plural shift positions of the at least one tooth flank of the provided tooth flank geometry, and generating, by a processor, control data based on a tooth flank geometry which is changed based on the determined parameters, wherein the changed tooth flank geometry corresponds to a tooth flank geometry of the tooth having the intended widthwise crowning, wherein the changed tooth flank geometry is retracted, at each of the plural shift positions, by an amount according to the respective associated shift parameter relative to the provided tooth flank geometry by changing the provided tooth flank geometry such that the tooth profile of the tooth flank is shifted, at each of the plural shift positions, by rotating the tooth profile about the rotational axis of the spur gear toothing according to the respective determined shift parameter.