《Engineering》极端制造前沿学术专题研讨会

Kogakuin University Japan

Professor Kazuhito Nishimura serves as a Research Fellow at the Ningbo Institute of MaterialsTechnology and Engineering (NIMTE), Chinese Academy of Sciences. He holds the distinguished titlesof Academician of the Engineering Academy of Japan and Emeritus Professor of Kogakuin University,Japan. His professional trajectory includes key positions as Principal Researcher at Sumitomo ElectricIndustries' Osaka Diamond Industrial Co., Ltd., and later as Professor and Director of the System DesignDepartment at Kogakuin University.

A pioneer in synthetic diamond materials and ultra-precision machining technologies, ProfessorNishimura has led the development of the groundbreaking UPC series diamond ultra-precision tools,which have been widely adopted for precision cutting in mechanical, optoelectronic, and automotiveindustries. His team's seminal achievement includes the invention of CVD diamond-coated "RhombicSeal" components with exceptional wear resistance and surface finish. These components weresuccessfully implemented in the core dynamic sealing systems of Mazda's rotary engines, marking theworld's first industrial application of diamond lubricious wear-resistant coatings in high-speed enginesealing applications. This series of innovations earned him the prestigious Takashiro Award from theJapan Society for Precision Engineering on three separate occasions.Recognized for his transnationalscientific contributions, Professor Nishimura was appointed as a Distinguished Expert under China's"Foreign Talent QR Program" and honored with the West Lake Friendship Award by the People'sGovernment of Zhejiang Province. His work continues to bridge fundamental research and industrialapplications, driving advancements in precision manufacturing technologies.

Reverse phenomena have been reported literatures concerning correlations between the removal ratesand the sample temperature at diamond polishing, which are determined by the polishing methods andthe conditions. The phenomena are considered to be due to difference of the mechanism at diamondpolishing processes but no valid interpretation has been found in literatures. It would be due to thedifficulty in evaluating them which occur at the sub-micron region in a very short time. In this study, weinvestigated the relationship of the removal rates and the sample temperatures, the textures and thecomposition of the processed surfaces of diamonds and polishing discs, especially concerningnon-abrasive with various polishing disc. In addition, we evaluated the heat flow through the diamondanalyzing the thermal images near the diamond and estimated on the temperature at the real contact areaof the diamond.