抄録
As accuracy of industrial product was reduced by several vibrations of a machine tool, a tool and a workpiece during cutting, there are several countermeasures for machining field. Recently the M2052 was used for reducing vibration. The M2052 has a property of very high damping ratio for vibration, however it has low static stiffness and very expensive. On the other hand, we developed the technology for creating new materials with hybrid properties. In this research, the sintered alumina and magnesium composite with both high static stiffness and high damping ratio was developed and evaluated. The manufacturing method was firstly developed. Then the consisted materials for the composite were selected by using FEM analysis. Properties of the composite were evaluated. At last the composite was used for the structural material of the lathe, the machining properties of the lathe were evaluated for surface roughness of a product and tool life in the experiment. It is concluded from the results that; (1) the manufacturing method for new composite was established, (2) the sintered alumina ceramics, magnesium and epoxy resin were used for the composite with both high static stiffness and high damping ratio, (3) the machine tool using the composite is very effective for high accuracy of the product.
