Grinding of Metal Matrix Composites
Date Issued
2009
Date
2009
Author(s)
Chen, Wei-Fan
Abstract
Due to the development and application of aluminium-based metal matrix composites extensively, precision machining demand also day by day increases, but reports on grinding of aluminium-based MMCs are still scarce. Aluminium-based MMCs are soft aluminum base including the hard ceramic reinforcements. Its materials behavior not only is ductile, but both sticky and hard. This research attempts and seeks to the economic grinding aluminium-based MMCs method. The contents of this article chiefly explain the effects on grinding aluminium-based MMCs when using liquid nitrogen, the general water-based fluid, the minimum quantity lubrication (MQL) and no cutting fluid.Under different cutting depth and grinding speeds, compare and analyze the differences when using liquid nitrogen, the general water-based fluid and no cutting fluid through the usage of wheel loading and wear, grinding force, surface of workpiece and roughness, also to analyze the diversification. The conclusion of this experiment is that using MQL can lubricate due to the more efficient penetration of the fluid into the cutting region, cause the cutting force to drop, be attributed mainly to the retention of the sharpness of the grits. The grinding wheel wear are relative to dry grinding and the wet grinding smaller. Using liquid nitrogen is the most effective to reduce wheel wear and loading, and is most prone to achieve better surface of workpiece and roughness than MQL grinding. When using liquid nitrogen, we acquire a flatter workpiece in order that we could economize the finished cost and to enhance efficiency.
Subjects
aluminium-based metal matrix composites
liquid nitrogen
Type
thesis
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