A NEW APPROACH COMBINING NUMERICAL ANALYSIS AND THREE DIMENSIONAL SIMULATION FOR DESIGN OF WORM GEARING WITH PREFERABLE LOCALIZED TOOTH CONTACT

摘要

A new approach has been developed for design of worm gear drives with preferable localised tooth contact (PLTC). The approach consists of numerical analysis and three-dimensional simulation within an advanced CAE package. The numerical analysis secures the localised contact, which provides mathematical models and a numerical calculation procedure to determine the modification parameters for the PLTC. With the three-dimensional simulation, the tooth contact pattern at any instant and the moving direction of the localised contact area can be predicted; moreover, the interference between the modified tooth surfaces can be detected, and, hence, it can be avoided at design stage. The simulation proves that the PLTC is much less sensitive to the errors arising from manufacturing and assembly, which is beneficial for achieving a high transmission quality and cutting down the time and efforts spent in production and assembly.