Volume 5, 2018
|Number of page(s)||12|
|Published online||21 November 2018|
Forces prediction in micro-grinding single-crystal copper considering the crystallographic orientation
School of Mechanical Engineering, Donghua University,
Shanghai 201620, PR China
2 Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta 30332, USA
* e-mail: email@example.com
Accepted: 11 October 2018
In the micro-grinding of single-crystal copper, the effect of crystallography becomes significant as the wheel works intra-crystalline. To quantify the effect of crystallographic orientation (CO) related to the cutting direction on the micro-grinding process, this article presents a Taylor factor model by examining the number and style of activated slip systems. Then, the flow stress model of monocrystalline material is developed considering the variation of the Taylor factor. Furthermore, the models of chip formation and rubbing forces are derived from the flow stress model, while the plowing force is predicted by the Vickers hardness. Then, the overall grinding force model of the whole wheel is developed by incorporating the process parameters and the wheel properties. Finally, micro-grinding experiments are conducted to verify the model, using only the Taylor factor as the variable. The proposed analysis is also compared with the previously reported model, which considers the Taylor factor as a constant of 3.06. The comparison between the two predictions and experimental data shows that the consideration of Taylor factor variability improves the accuracy of prediction.
Key words: crystallographic orientation / Taylor factor / flow stress / Vickers hardness / force
© M. Zhao et al., Published by EDP Sciences 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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