An investigation of involute and lead deflection in hot precision forging of gears

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Title: An investigation of involute and lead deflection in hot precision forging of gears
Authors: Zuo, B
Wang, B
Li, Z
Li, N
Lin, J
Item Type: Journal Article
Abstract: A theoretical model is presented in the paper for predicting involute profile deflection in hot precision forging of gears. This model is a function of a number of material and processing parameters, including the thermal expansion of the die, thermal contraction of workpiece, elastic expansion of the die during forging, and workpiece recovery after ejection. To improve the accuracy of the hot forged gear tooth, an equation set to define modified involute that is used to design the die tooth has been proposed based on the model. The distribution of deflection along the involute was also predicted using the commercial FE code, PRO-E. The deflection characteristic of the toothed die through the tooth width was analyzed by combining the theoretical method and FEM to investigate the non-uniform deflection. The dimension of the forged gears was measured using a gear measurement machine WGT3000. A close agreement between predicted and measured tooth involute profiles was obtained, which validated the involute deflection prediction model. The measured lead error also verified the model for deflection non-uniformity through the tooth width. The results can provide a guide for die tooth designs to improve the dimensional accuracy of hot forged gear teeth.
Issue Date: 11-Jun-2016
Date of Acceptance: 31-May-2016
ISSN: 1433-3015
Publisher: Springer Verlag
Start Page: 3017
End Page: 3030
Journal / Book Title: International Journal of Advanced Manufacturing Technology
Volume: 88
Issue: 9-12
Copyright Statement: © The Author(s) 2016. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (, which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Sponsor/Funder: The Royal Society
Funder's Grant Number: IJP2007/R3
Keywords: Science & Technology
Automation & Control Systems
Engineering, Manufacturing
Hot precision forging
Gear forging
Tooth deflection
Involute modification
Thermal expansion
09 Engineering
08 Information And Computing Sciences
01 Mathematical Sciences
Industrial Engineering & Automation
Publication Status: Published
Appears in Collections:Faculty of Engineering
Mechanical Engineering
Dyson School of Design Engineering

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