Harmonic drive gear failures in industrial robots applications: An overview

A Raviola, A De Martin, R Guida… - PHM Society …, 2021 - papers.phmsociety.org
Industrial robots play a key role in production lines. As a direct consequence, even a slight
degradation of their operating conditions could negatively affect the entire manufacturing …

Analysis of contact mechanical characteristics of flexible parts in harmonic gear reducer

F Li, X Li, Y Guo, D Shang - Shock and Vibration, 2021 - Wiley Online Library
Harmonic gear reducer is widely used in industrial robots, aerospace, optics, and other high‐
end fields. The failure of harmonic gear reducer is mainly caused by the damage of flexible …

A Preliminary Experimental Study on the Effects of Wear on the Torsional Stiffness of Strain Wave Gears

A Raviola, A De Martin, M Sorli - Actuators, 2022 - mdpi.com
Strain wave gears, also known as harmonic drives, are employed in a wide range of fields
such as robotics and aerospace, where light weights, precision, and reliability are essential …

Design, analysis, and optimization of a strain wave gear with a novel tooth profile

YH Cheng, YC Chen - Mechanism and Machine Theory, 2022 - Elsevier
In this study, an optimization process was designed for a strain wave gear (SWG) through
finite element analysis (FEA) to improve its performance. Two optimization steps are …

Tooth position and deformation of flexspline assembled with cam in harmonic drive based on force analysis

Y Yao, X Chen, J Xing, L Shi, Y Wang - Chinese Journal of Mechanical …, 2021 - Springer
Deformation of the flexspline is the basis of analyzing tooth trajectory and designing tooth
profile. Considering the tooth influence on the position of equivalent neutral layer, a …

Wear mechanism of flexspline materials regulated by novel amorphous/crystalline oxide form evolution at frictional interface

C Zhang, Z Song, Z Liu, Q Cheng, Y Zhao, C Yang… - Tribology …, 2019 - Elsevier
Flexspline is the most vulnerable component of harmonic drives, and its wear is likely to
induce failure. Therefore, this study investigated the tribological properties of three typical …

Formation of robust polydimethylsiloxane coatings on the flexspline material and mechanism of the tribological property improvement

CX Zhang, CX Xu, ZF Liu, MM Liu, HY Chu, KC Zhang - Langmuir, 2022 - ACS Publications
Flexspline frictional degradation causes failure of harmonic drives. This study focused on the
improvement of the flexspline tribological properties. Flexspline material 40Cr was modified …

A general mathematical modeling and finite element analysis of a strain wave gear possessing a double-circular-arc-with-a-common-tangent profile

YH Cheng, YC Chen - Proceedings of the institution of …, 2023 - journals.sagepub.com
In this study, the characteristics of a strain wave gear (SWG) with a double-circular-arc with a
common tangent (DCACT) profile were simulated using two-dimensional (2D) and three …

Design and analysis of cam wave generator based on free deformation in non-working area of the flexspline

S Wang, D Li, S Mao, B Chen - Applied Sciences, 2021 - mdpi.com
Deformation stress of a flexspline under the action of a wave generator directly affects the
service life of the flexspline and meshing quality of meshing pair. This study proposed a new …

[HTML][HTML] Comprehensive Analysis of Major Fault-to-Failure Mechanisms in Harmonic Drives

R Guida, AC Bertolino, A De Martin, M Sorli - Machines, 2024 - mdpi.com
The present paper proposes a detailed Failure Mode, Effects, and Criticality Analysis
(FMECA) on harmonic drives, focusing on their integration within the UR5 cobot. While …