Tool life prediction for the bolt forming process based on high-cycle fatigue and wear

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In the present investigation an integrated model for predicting tool life in the cold forging process considering the high-cycle fatigue and wear is proposed in terms of mechanical properties of the workpiece. For calculating wear amount during cold forging, Archard's wear model was reformulated as an incremental form and implemented into the finite element code. Following a series of FE simulations, empirical equations for estimating the tool life based on wear and fatigue models were obtained. The present results showed that tool life due to high-cycle fatigue failure decreased significantly as the strength of material increased. Meanwhile tool life caused by wear also decreased as the strength of material decreased but the rate of tool life reduction was relatively small. This implies that tool life should be estimated using the fatigue failure model for cold forging of high strength steels. On the other hand, for cold forging of low strength steels, die life should be evaluated considering wear model as well. (C) 2007 Elsevier B.V. All rights reserved.
Publisher
ELSEVIER SCIENCE SA
Issue Date
2008-05
Language
English
Article Type
Article; Proceedings Paper
Keywords

FAILURE

Citation

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, v.201, no.1-3, pp.348 - 353

ISSN
0924-0136
URI
http://hdl.handle.net/10203/12105
Appears in Collection
ME-Journal Papers(저널논문)
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