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http://dx.doi.org/10.5228/KSTP.2012.21.7.397

Behavior and Reduction of Spring-back in a Thin Cold-Forged Product  

Kim, D.W. (한국생산기술연구원)
Shin, Y.C. (한국생산기술연구원)
Choi, H.J. (한국생산기술연구원)
Yoon, D.J. (한국생산기술연구원)
Lee, G.A. (한국생산기술연구원)
Kim, Y.G. ((주) 대림엠티아이)
Lim, S.J. (한국생산기술연구원)
Publication Information
Transactions of Materials Processing / v.21, no.7, 2012 , pp. 397-402 More about this Journal
Abstract
The flange hub is a main component in an automotive steering system. In general, the flange hub are fabricated by mechanical machining, which is a process where material waste is inevitable. It is well-known that a net-shape cold forging cannot only reduce material waste but can also improve the mechanical strength of the final product. Thus, a forging process design was conducted for production of a flange hub. Significant spring-back occurs around the flange due to its small thickness in conjunction with the residual stresses after forging. In order to achieve the required dimensional accuracy, a process design with appropriate spring-back control is needed. In this study, a modification of the forging die was designed based on FE analysis with the purpose of spring-back compensation. Four kinds of different die designs were evaluated and the optimum design has two times less spring-back than the initial design. The compensation angle of the optimum design is 0.5 degrees. The results have been experimentally confirmed by cold forging of a flange hub and comparing the amount of spring-back between the actual component and the FE analysis.
Keywords
Spring-back; Flange Hub; Cold Forging; FE Analysis;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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