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| Experimental Study on Mill-Grinding of High Volume Fraction SiCp/Al Metal Matrix Composites |
| LI Xun1, BAI Fan1, FU Yu1, CUI Wei2 |
(1. School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China;
2. China Nuclear Power Engineering Co., Ltd., Beijing 100840,China) |
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Abstract Based on analyzing the material properties and grinding mechanism, the mill-grinding process is presented
to machine high volume fraction SiCp/Al MMCs. The experimental results show that 65% volume fraction SiCp/Al
MMCs presents the machinability of brittle material. Meanwhile, the electroplated diamond wheel will not be smeared with
soft aluminum to lose machinability. The broken degree of SiC particles is the main influencing factor of surface roughness.
R a value decreases gradually with increasing of disintegrated degree, wheel’s grit number and reducing of feed speed. Under
the given experimental conditions, 120# φ 8mm electroplated diamond wheel is very suitable for rough machining and
MRR can be improved to 2400mm3/min with parameters optimized. At the same time, F z is not more than 25N and F x, F y
are not more than 15N. The finishing SFR can be reached 6400mm2/min utilizing 230# φ 8mm electroplated diamond wheel
under the premise of surface roughness less than R a0.4μm.
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2017, 
