Yutaka Kameyama

Transfer of Nanocarbon Induced by Fine Particle Peening (FPP) Using Carbon-Black/Steel Hybridized Particles

Fine Particle Peening (FPP) treatment, where the surfaces of materials are bombarded with fine shot particles, can transfer shot particle elements on the treated surface. In order to create nanocarbon-transferred surface with FPP treatment, hybridized particles combining steel cores and nanocarbon surface layer are proposed. Mixing with mechanical mortar creates attached layer of carbon-black powders on surface of steel cores, resulting in formation of hybridized particles. FPP using the hybridized particles significantly increases carbon elements on AISI304 steel substrate. This is because of transfer of carbon-black from hybridized particle. Transfer of carbon-black is enhanced when the hybridized particles with high hardness cores are employed. It is revealed that the hybridized particle proposed in the present study is effective to create the modified layer accompanied with transferred nanocarbon.

On-line sensing, measuring process in ultra-fine machining with micro-tools

In recent years, more and more ultra-fine machining necessities are increasing for micro-parts and micro-components fabrication. Although down-sizing of tools are tried for micro-machining, it is not easy to realize smart fabrication because sensing and measurement of micro-machining is difficult. The authors are conducting a research and development on sensing, measurement and analysis of micro-machining phenomenon for establishment of optimization of machining conditions and automation of high-level machining processes. Under this background, we devised on-line sensing, measuring, and analyzing system for micro-machining with micro-tools. This system can cope with from fabrication of micro-tools to micro-machining of micro-structures on the all-in-one machine under on-line sensing, measuring functions. Through the application of this system, we investigated the sensing of contact point, chip-formation and monitoring in micro-machining, together with fabrication and analysis of micro-tools of even several microns diameter. In this paper, we introduce the developed system and describe the micro-tools fabrication and micro-machining under on-line sensing and measurement.