Dynamical behavior of noncontact driving cam mechanism using permanent magnets

Toyoki Takazakura, Toshio Morita, Toshihiko Sugiura

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

In general cam mechanisms, mechanical contact between a cam driver and a cam follower causes problems such as frictional wear, needs for lubrication and noise. Accordingly, we proposed a new cam mechanism whose contact parts are replaced by permanent magnets exerting repulsive force on each other. The purpose of this study is to investigate the efficacy of the mechanism which can drive without mechanical contact. To evaluate the effectiveness of the mechanism, we constructed an analytical model, derived an equation of motion of the cam follower and conducted numerical calculation of it. Furthermore, we conducted experiments corresponding to the model. As a result, occurrence of superharmonic resonance and collision of the driver and the follower in the neighborhood of the primary resonance point were observed. However, except in occurrence region of them, the rotating motion of the driver was favorably converted into reciprocating motion of the follower without contact. Thus we concluded that a magnetic cam is useful at appropriate rotational speed of the driver.

Original languageEnglish
Pages (from-to)169-174
Number of pages6
JournalInternational Journal of Applied Electromagnetics and Mechanics
Volume52
Issue number1-2
DOIs
Publication statusPublished - 2016

Fingerprint

cams
Cams
permanent magnets
Permanent magnets
mechanical drives
superharmonics
occurrences
Mechanical drives
lubrication
Equations of motion
Lubrication
Analytical models
equations of motion
Wear of materials
collisions
causes
Experiments

Keywords

  • electromagnetic induced vibration
  • nonlinear vibration
  • Numerical simulation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

Cite this

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abstract = "In general cam mechanisms, mechanical contact between a cam driver and a cam follower causes problems such as frictional wear, needs for lubrication and noise. Accordingly, we proposed a new cam mechanism whose contact parts are replaced by permanent magnets exerting repulsive force on each other. The purpose of this study is to investigate the efficacy of the mechanism which can drive without mechanical contact. To evaluate the effectiveness of the mechanism, we constructed an analytical model, derived an equation of motion of the cam follower and conducted numerical calculation of it. Furthermore, we conducted experiments corresponding to the model. As a result, occurrence of superharmonic resonance and collision of the driver and the follower in the neighborhood of the primary resonance point were observed. However, except in occurrence region of them, the rotating motion of the driver was favorably converted into reciprocating motion of the follower without contact. Thus we concluded that a magnetic cam is useful at appropriate rotational speed of the driver.",
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author = "Toyoki Takazakura and Toshio Morita and Toshihiko Sugiura",
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AU - Takazakura, Toyoki

AU - Morita, Toshio

AU - Sugiura, Toshihiko

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N2 - In general cam mechanisms, mechanical contact between a cam driver and a cam follower causes problems such as frictional wear, needs for lubrication and noise. Accordingly, we proposed a new cam mechanism whose contact parts are replaced by permanent magnets exerting repulsive force on each other. The purpose of this study is to investigate the efficacy of the mechanism which can drive without mechanical contact. To evaluate the effectiveness of the mechanism, we constructed an analytical model, derived an equation of motion of the cam follower and conducted numerical calculation of it. Furthermore, we conducted experiments corresponding to the model. As a result, occurrence of superharmonic resonance and collision of the driver and the follower in the neighborhood of the primary resonance point were observed. However, except in occurrence region of them, the rotating motion of the driver was favorably converted into reciprocating motion of the follower without contact. Thus we concluded that a magnetic cam is useful at appropriate rotational speed of the driver.

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