Development of Ceramics Resin Concrete for Precision Machine Tool Structure. Continuation of Tool Life.

In the first report, a new material called ceramics resin concrete was developed for precision machine tool structures. Next, in the second report, thermal and mechanical properties of the material were clarified in order to design a machine tool. Then in the third report, Young's modulus of the material was improved to be comparable to that of cast iron, by means of a new manufacturing method. In this report, continuation of tool life using the material has been examined. Then the causes of continuation were investigated by FEM analysis and experimental analysis of the selfexcited chatter model with a holder. It is concluded that tool life in a NC lathe with a tool post using the material is five times that of a conventional NC lathe. In addition, it is verified that the use of ceramics resin concrete is effective for preventing self-excited chatter.