Conical Involute Gear : Part 1. Design and Production System

Abstract

A design and production system of the conical involute gear is established. First the basic rack composing of the normal tooth profile and the plane of symmetry, and basic dimensions are defined. Gear dimensions are expressed in terms of the basic dimensions. Second, a method of designing the generating rack is developed and designs of both straight and helical conical involute gears are studied. Finally two methods of taper hobbing are investigated, in which any conical involute gear can be cut by a cylindrical hob. One is the table-sliding taper hobbing, and the other the inclined-work-arbor taper hobbing. Many gears were made for trial and it was confirmed that this system has a practical utility.