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Vibration Mode and Durability Characteristics of Automotive IDS using Rotary Swaging Process for Incremental Forming  

Lim Seong-Joo (Department of Advanced Precision Engineering, Inha University)
Lee Nak-Kyu (Digital Production Processing Team, KITTECH)
Lee Chi-Hwan (Department of Material Science and Engineering, Inha University)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.13, no.5, 2005 , pp. 127-133 More about this Journal
Abstract
Rotary swaging is one of the incremental forming process which is a chipless process using the reduction of cross-sections of bars, tubes and wires. The TDS(Tube Drive Shaft) of monobloc used in automotive has been developed by the rotary swaging process. The mechanical characteristics of swaged parts such as the hardness, thickness and roughness are also estimated to conduct experimental analyses of rotary swaging process with the materials of 34Mn5 Furthermore the change in the vibration mode of TDS due to design parameters, which are the tube length, diameter and thickness, has been investigated and analysed. The weight of the TDS product is smaller by about $12.8\%$ than that of SDS with the same performance. It could be evidently found that the TDS is designed to be much lighter than SDS (Solid Drive Shaft). This advantage might give some possibility to improve the NVH (Noise-Vibration-Harshness) characteristics. A maximum torque and a total number of torsional repetitions for the TDS is checked and measured to know the torsional intensity and fatigue strength through the static torsion test and torsional durability test, respectively. A total number of the torsional repetitions up to the fracture for the TDS is greater than 250,000 times.
Keywords
Rotary swaging; Natural frequency; Drive shaft; Torsion mode; Bending mode; Noise-vibration-harshness;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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