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Alignment Deviations on a Lead Crowned Helical Gear Manufactured by a Hob

På svenska

Author

  • Mattias Svahn
  • Lars Vedmar

Summary, in English

Gear hobbing is well established and one of the most cost effective manufacturing methods of involute gears. In the hobbing of lead crown corrected helical gears, a well know drawback is the non-uniform systematic tooth alignment deviation that arises. This is sometimes denoted as flank twist. The inevitable tooth alignment deviation, together with other source deviations, must not exceed the specified tolerances if the gear is to be finished hobbed. To avoid trial and error when selecting manufacturing method, it would be of great industrial interest to be able to predetermine the least expected alignment deviation when the gear is to be finished hobbed. The main purpose of this study is to determine the magnitude of the systematic alignment deviations which arises for hobbed gears with lead crown correction. A simulation tool is developed where the hobbing process can be analysed, without additional errors resulting from real conditions. The results from this simulation tool show very good correlation with an experimental gear ground by a hob in industrial conditions. By elimination of feed marks on the gear tooth surface, a novel method to predetermine the least expected alignment deviation was found by an analytical analysis. The results from these studies can be used as a guideline when selecting manufacturing method for involute gears.

Publishing year

2012

Language

English

Pages

287-294

Publication/Series

[Host publication title missing]

Document type

Conference paper

Topic

  • Mechanical Engineering

Keywords

  • tooth alignment deviation
  • gear hobbing
  • involute helical gear
  • flank twist
  • lead crowning.

Conference name

Swedish Production Symposium, 2012

Conference date

2012-11-06 - 2012-11-08

Conference place

Linköping, Sweden

Status

Published

ISBN/ISSN/Other

  • ISBN: 978-91-7519-752-4