Abstract
A new method for the prediction of die wear is established by studying the wear characteristics of automobile panels stamping dies. This method takes into account the contact pressure, the change of wear coefficient and material hardness along the thickness direction of the treatment layer. In order to obtain the relationship of wear coefficients with contact pressures and die hardness, a new kind of friction wear device is designed, which can simulate the wear environment of the blank-die interface in practical stamping. With this equipment, the dynamic wear coefficient considered the contact pressure and die hardness is obtained. Based on finite element software LS-DYNA, the prediction of die wear is achieved by using the dynamic coefficient and the continuously update of wear surface by means of the move of nodes. Based on wear at the feature line of an engine hood outer panel, the relationship between wear depth and stamping times is established. Comparing the prediction results of the new method and the traditional Archard method with the practical wear condition, the results show that the die life prediction method used in this study is closer to the practical condition; moreover, the accuracy is obviously higher than the traditional Archard method.
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Acknowledgements
The authors gratefully acknowledge the support from the National Key Research and Development Program of China (Item no. 2016YFB0300400). The authors would also like to thank SGMW Technology Center for providing test specimens for these studies and also thank them for their active interest in this work.
Funding
This work has been carried out with financial support from the National Key Research and Development Program of China (Item no. 2016YFB0300400).
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Qiao, X., Cheng, A., Nie, X. et al. A study on die wear prediction for automobile panels stamping based on dynamic model. Int J Adv Manuf Technol 97, 1823–1833 (2018). https://doi.org/10.1007/s00170-018-1811-6
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DOI: https://doi.org/10.1007/s00170-018-1811-6