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A Method for Constructing Standard Involute Gear Tooth Profile

[+] Author Affiliations
Edward E. Osakue

Texas Southern University, Houston, TX

Lucky Anetor

Nigerian Defence Academy, Kaduna, Nigeria

Paper No. IMECE2018-86573, pp. V013T05A026; 11 pages
doi:10.1115/IMECE2018-86573
From:
  • ASME 2018 International Mechanical Engineering Congress and Exposition
  • Volume 13: Design, Reliability, Safety, and Risk
  • Pittsburgh, Pennsylvania, USA, November 9–15, 2018
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-5218-7
  • Copyright © 2018 by ASME

abstract

A simple but accurate combined computationaland graphical method for creating drawings and solid models of standard involute gears is presented. The method is predicated on the fact that the gear tooth angle at the base circle is fixed for a gear of specified module or size. As the contact point moves along the involute curve from the base circle point through the pitch point to the addendum circle point; the involute and gear tooth contact angles change continuously but their sum is fixed at the value it was at the base circle. This allows the coordinates of points on the involute curve to be generated analytically without employing the roll angle as current available methods. The generated data can be implemented in any computer design drafting (CDD) package platform to create an accurate gear tooth profile. The computations are done with Microsoft Excel which generates the graphical data for the gear tooth profile that are used in the CDD package. The required inputs to the Excel spreadsheet are the gear module size, the pressure angle, the number of teeth and the radial number of steps. A gearset example is considered and created with this method. The solid model of the example gearset in mesh and 2D drawing of the pinion are presented.

Copyright © 2018 by ASME
Topics: Gear teeth

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