中本 剛

This paper deals with development of a new method for producing profile grinding wheel. At first, the desired shape is made of metal that is machined easily. Next, powder material is spread on a surface of the metal. And the surface is scanned by a laser beam and then a ceramic layer is produced on the surface of the metal by the chemical reaction between the powder material and metal material. The produced ceramic layer is used as grinding wheel. The powder material is boron and the metal material is titanium in this experiment. The components of the layer are examined by X-ray diffraction and titanium boride is detected in the layer.

Diamond is the hardest material, therefore, diamond is used as tools for ultra-precision machining. For practical use, diamond must be machined into the desired shape. Generally diamond is machined by polishing disc with diamond powder, but this method takes long time and is limited of plane form. By the way, when steel is cut by a diamond tool, it is well known that a diamond tool is worn severely. The purpose of this research work is to machine a diamond by utilizing this wear. The removal rate of the diamond is investigated in this paper.

The purpose of this research work is to produce micro part reinforced with unidirectional whiskers by laser photolithography. Electric field is applied by probes in limited area, and the axes of whiskers in liquid photopolymer are aligned along the direction of the electric field. An electric field-applying device was developed. Whiskers can be aligned using the apparatus. The alignment of the whiskers depends on the permittivity and the viscosity of liquid photopolymer. The values are measured in this paper.

Generally diamonds are machined by polishing disc with diamond powder, but this method costs, takes long time and is limited of plane form. This research is an experimental investigation of diamond precision machining by steel, through utilization of tool wear during cutting process. In order to perform precision machining of diamond, a miniature size machine tool is developed. A steel disc is cut by a diamond on this machine tool. The machined profile of the diamond is investigated in this paper.