Process analysis and test of manufacturing of sleeve spring-type torsional vibration damper |
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Authors: | Beom Cheol Hwang Won Byong Bae Chul Kim |
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Affiliation: | (1) KS Aluminium Technologie GmbH, Neckarsulm, Germany;(2) Wiesbaden, Germany;(3) Mahle GmbH, Stuttgart, Germany |
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Abstract: | In diesel engines, engine torque fluctuation inevitably produces torsional vibration. A sleeve spring-type damper commonly
is used to reduce this vibration. In this paper, closed form equations to predict the spring constant of a sleeve spring and
the torsional characteristics of a torsional vibration damper are proposed for calculation of the stiffness of the damper.
The equations were verified through finite element analysis (FEA) and experiments. In addition, the stability of the sleeve
spring-type torsional vibration damper was verified in an analysis of the inner star and outer star (the core components of
the damper). A two-roll bending process, proposed in this paper, was determined to be the most suitable for manufacture of
the sleeve springs. A closed form equation to calculate the forming radius, taking account of the springback effect, was derived,
and a FEA method used to analyze the elasto-plastic problem was verified through an analysis of a 90° bending process. The
results of the analysis were in good agreement with the experiment. It is recommended that our proposed method, an advanced
technique that can significantly reduce production costs, replace the conventional forming process. |
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