Abstract
This article proposes the application of a profile-shifted grinding disc to generate an offset, non-orthogonal and profile-shifted face gear. A detailed investigation of the modelling, tooth geometry and contact characteristics of the offset, non-orthogonal and profile-shifted face gear has been conducted. The mathematical models of the profile-shifted shaper cutter, profile-shifted pinion, profile-shifted grinding disc and offset, non-orthogonal and profile-shifted face gear are established. Considering the topological modification, the tooth surface equation of the offset, non-orthogonal and profile-shifted face gear is deduced. Based on the undercutting and pointing of the tooth surface, the limiting tooth width of the offset, non-orthogonal and profile-shifted face gear is determined, and a mathematical model of tooth contact analysis of the offset, non-orthogonal and profile-shifted face gear drive is established with the alignment errors. Using the approach presented in this article, an example of an offset, non-orthogonal and profile-shifted face gear drive and analytical results are presented.
Highlights
Face gear drives are a new type of gear transmission consisting of a cylindrical pinion and a conjugated face gear with the advantages of low noise, light weight and convenient installation compared with bevel gear drives.[1,2] When machining the face gear, according to the position relationship between the cutter and the machined face gear, the two axes can be divided into vertical intersection, non-vertical intersection, vertical staggered and non-vertical staggered for four types of situation
The presented method of a grinding ONP face gear is based on the application of a profile-shifted grinding disc, and the machining process is based on the simulation of meshing the face gear with a single tooth of a profile-shifted shaper cutter
An ONP face gear generated by a profileshifted grinding disc is introduced and the tooth geometry and contact characteristics of ONP face gears are studied
Summary
Face gear drives are a new type of gear transmission consisting of a cylindrical pinion and a conjugated face gear with the advantages of low noise, light weight and convenient installation compared with bevel gear drives.[1,2] When machining the face gear, according to the position relationship between the cutter and the machined face gear, the two axes can be divided into vertical intersection, non-vertical intersection, vertical staggered and non-vertical staggered for four types of situation. The presented method of a grinding ONP face gear is based on the application of a profile-shifted grinding disc, and the machining process is based on the simulation of meshing the face gear with a single tooth of a profile-shifted shaper cutter. There are three types of motion during grinding: the profile-shifted grinding disc swings around the axis of the profileshifted shaper cutter, zs, with angular velocity vs, and the ONP face gear rotates about its own axis z2 with angular velocity v2, these motions together form the generating motion; the high-speed rotation of the grinding wheel at vg about its own axis xg constitutes the cutting motion; the feed motion is the oscillating motion of the profile-shifted grinding disc along the axis zg, and if the motion track of the profile-shifted grinding disc is a curve, for example, the parabola g, axial modification of the ONP face gear can be achieved.
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