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Reducing scrapping of gears by assessment of tip contact threshold torque

Hjelm, Rikard LU ; Ahadi, Aylin LU and Wahlström, Jens LU orcid (2022) In Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 236(8). p.1613-1622
Abstract

While striving for more competitive products as well as reaching the Global Sustainable Development Goals, automotive powertrain manufacturers increase the demands on gears, which translates to decreased manufacturing error tolerances. Too tight tolerances may, however, counteract the goal if it leads to increased material and energy consumption due to unjustified scrapping. This paper presents a method to prevent unjustified scrapping by comparing the severity of different manufacturing error tolerances by means of the tip contact threshold torque. Curve fits are shown to be accurate and helpful to assess the outcome of a produced batch of gears. A case study is made where the method is used with measured data from the industry. It can... (More)

While striving for more competitive products as well as reaching the Global Sustainable Development Goals, automotive powertrain manufacturers increase the demands on gears, which translates to decreased manufacturing error tolerances. Too tight tolerances may, however, counteract the goal if it leads to increased material and energy consumption due to unjustified scrapping. This paper presents a method to prevent unjustified scrapping by comparing the severity of different manufacturing error tolerances by means of the tip contact threshold torque. Curve fits are shown to be accurate and helpful to assess the outcome of a produced batch of gears. A case study is made where the method is used with measured data from the industry. It can be concluded from the investigation that considerable amounts of scrapping can be avoided by consideration of the threshold torque.

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Please use this url to cite or link to this publication:
author
; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
LTCA, pitch error, profile slope error, Scrapping, threshold torque, tip contact, tolerance
in
Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology
volume
236
issue
8
pages
1613 - 1622
publisher
Professional Engineering Publishing
external identifiers
  • scopus:85122145745
ISSN
1350-6501
DOI
10.1177/13506501211066298
language
English
LU publication?
yes
additional info
Publisher Copyright: © IMechE 2021.
id
b775f550-9283-47f4-ac77-79e2f8500201
date added to LUP
2022-01-14 09:42:44
date last changed
2022-06-30 16:46:53
@article{b775f550-9283-47f4-ac77-79e2f8500201,
  abstract     = {{<p>While striving for more competitive products as well as reaching the Global Sustainable Development Goals, automotive powertrain manufacturers increase the demands on gears, which translates to decreased manufacturing error tolerances. Too tight tolerances may, however, counteract the goal if it leads to increased material and energy consumption due to unjustified scrapping. This paper presents a method to prevent unjustified scrapping by comparing the severity of different manufacturing error tolerances by means of the tip contact threshold torque. Curve fits are shown to be accurate and helpful to assess the outcome of a produced batch of gears. A case study is made where the method is used with measured data from the industry. It can be concluded from the investigation that considerable amounts of scrapping can be avoided by consideration of the threshold torque.</p>}},
  author       = {{Hjelm, Rikard and Ahadi, Aylin and Wahlström, Jens}},
  issn         = {{1350-6501}},
  keywords     = {{LTCA; pitch error; profile slope error; Scrapping; threshold torque; tip contact; tolerance}},
  language     = {{eng}},
  number       = {{8}},
  pages        = {{1613--1622}},
  publisher    = {{Professional Engineering Publishing}},
  series       = {{Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology}},
  title        = {{Reducing scrapping of gears by assessment of tip contact threshold torque}},
  url          = {{http://dx.doi.org/10.1177/13506501211066298}},
  doi          = {{10.1177/13506501211066298}},
  volume       = {{236}},
  year         = {{2022}},
}