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http://dx.doi.org/10.5228/KSPP.2004.13.1.003

FE Techniques for the Accurate Prediction of Part Dimension in Cold Forging  

이영선 (한국기계연구원 공정연구부 소성응용그룹)
권용남 (한국기계연구원 공정연구부 소성응용그룹)
이정환 (한국기계연구원 공정연구부 소성응용그룹)
Publication Information
Transactions of Materials Processing / v.13, no.1, 2004 , pp. 3-8 More about this Journal
Abstract
The improvement of dimensional accuracy for forged part is one of major goals in cold forging industry. There are many problems in controlling the dimension by the trial-and-error, especially for a precision forged gear. A FEM analysis has been used in developing the forging technology. However, FE techniques have to be reconfirmed for predicting accurately the dimension of forged part. In this study, the effects of elastic characteristics and temperature changes are investigated by the comparisons between experimental and FEA in cold forging. When FE models related with elastic characteristics are considered practically, FE results could predict the part dimension within the range of $10\mu\textrm{m}$. And if thermal effects also are considered additionally, the predicted dimensions are well coincided with the experimental down to about $5\mu\textrm{m}$.
Keywords
Closed Die; Cold Upsetting; FEM; Dimensional Change; Strain Gauge; Loading; Unloading; Ejecting;
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