A Methodology for Longitudinal Tooth Flank Crowning of the Helical Gear on a CNC Honing Machine

Abstract

The gear honing is the most economical way for hard finishing an involute helical gear after hobbing and heat treatment or after shaving and heat treatment. The gear honing can also be applied to the modification of gear tooth surfaces to compensate for the distortions that occur during heat treatment process. Most published papers on the technology of gear honing describes on the principle of generated gear surface. However, the longitudinal tooth flank crowning of a helical gear with honing has not been investigated yet. Therefore, in this paper, we proposed a novel method for longitudinal tooth flank crowning of work gear surfaces by setting a crossed angle between the honing cutter and work gear axes as a linear function of honing cutter's traverse feed in the honing process. A mathematical model for the tooth profile of work gear honed by a standard honing cutter is also established. Three numeral examples are presented to illustrate and verify the merits of the proposed gear honing method in longitudinal crowning.

Research on the mechanisms of internal gear honing by use of cone-shape honing wheel with tool tilt angle

“…Many studies of gear honing are focused on the modification methodology. Tran [3] proposed a new way for longitudinal tooth flank crowning of work gear surfaces in honing process. Han [4] developed a mathematical model for lead and profile crowning modification of work gear by setting the movement of the honing wheel as two forth-order polynomial functions.…”

Lead Crowning and Anti-Twist for Tooth Flank of a Heat Treated Helical Gear on Internal CNC Honing Machine

“…Recently, Tran et al [7] proposed a novel hobbing method to free-twist tooth flanks of the involute helical gear in longitudinal tooth on CNC hobbing machine. Subsequently, Tran et al [8,9] proposed a gear honing method for longitudinal crowning and free-twist tooth flank of work gear surfaces in the external honing process. All basic mesh conditions for the helical gear set have been presented in textbook [10].…”