Prof. Weimin Lin, Gunma University, Japan

Title: Introduction of recent polishing technology

Abstract: In recent years, as precision machinery and information equipment become increasingly compact and high performance, demanding for higher precision are also growing stronger for the optical parts which make up these equipment, as well as the molds used for manufacturing high precision optical lenses. Already, several high precision polishing methods for molds with free form surfaces are available, but there are still no efficient and stable means of computer control polishing. In this presentation, we will introduce and discusses the Rotation and Revolution Polishing (RRP) method which meets increasing demands for high quality aspherical optics and higher precision polishing techniques by its unique machining positions and tool shapes. The RRP method is a promising precision polishing method as it can stably maintain polishing tool shapes and uniformly generate the surface roughness by through optimum polishing velocity distribution. Experiments were conducted to determine and prove the of effectiveness of mathematic models on polished profiles based on the Preston equation under diverse conditions.

Biography: Weimin Lin received his Bachelor of mechanical engineering from Saitama University, Japan, in 1994, followed by MSc and Ph. D from Saitama University, Japan, in 1996 and 1999, respectively. He is currently a professor in the Division of Mechanical Science and Technology of Graduate School of Science and Technology, Gunma University. His research fields include ultra-precision process technology, polishing of optical elements, and metrology. He is a fellow of the International Society for Nanomanufacturing (ISNM). and he is a member of, the Japan Society for Precision Engineering (JSPE), the Japan Society of Mechanical Engineers (JSME), the Japan Society for Abrasive Technology (JSAT), and Society of Automotive Engineers of Japan (SAEJ).