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

Svahn, Mattias LU and Vedmar, Lars LU (2012) Swedish Production Symposium, 2012 In [Host publication title missing] p.287-294
Abstract
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... (More)
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. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
tooth alignment deviation, gear hobbing, involute helical gear, flank twist, lead crowning.
in
[Host publication title missing]
pages
8 pages
conference name
Swedish Production Symposium, 2012
ISBN
978-91-7519-752-4
language
English
LU publication?
yes
id
c23ac011-3e51-4bda-8201-84760e73f692 (old id 3168100)
date added to LUP
2012-11-14 13:38:05
date last changed
2016-07-15 08:23:42
@inproceedings{c23ac011-3e51-4bda-8201-84760e73f692,
  abstract     = {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.},
  author       = {Svahn, Mattias and Vedmar, Lars},
  booktitle    = {[Host publication title missing]},
  isbn         = {978-91-7519-752-4},
  keyword      = {tooth alignment deviation,gear hobbing,involute helical gear,flank twist,lead crowning.},
  language     = {eng},
  pages        = {287--294},
  title        = {Alignment Deviations on a Lead Crowned Helical Gear Manufactured by a Hob},
  year         = {2012},
}