Mathematical description of tooth flank surface of globoidal worm gear with straight axial tooth profile

• Main Authors: Połowniak Piotr, Sobolak Mariusz
• Format: Article
• Language: English
• Published: De Gruyter 2017-12-01
• Series: Open Engineering
• Subjects: globoid worm gear; ta worm; meshing analysis
• Online Access: https://doi.org/10.1515/eng-2017-0047

In this article, a mathematical description of tooth flank surface of the globoidal worm and worm wheel generated by the hourglass worm hob with straight tooth axial profile is presented. The kinematic system of globoidal worm gear is shown. The equation of globoid helix and tooth axial profile of worm is derived to determine worm tooth surface. Based on the equation of meshing the contact lines are obtained. The mathematical description of globoidal worm wheel tooth flank is performed on the basis of contact lines and generating the tooth side by the extreme cutting edge of worm hob. The presented mathematical model of tooth flank of TA worm and worm wheel can be used e.g. to analyse the contact pattern of the gear.