报告题目：超精密加工和模压
报告人：艺苑（美国俄亥俄州立大学教授）
报告时间：2018年12月7日星期五下午3:00-5:00
报告地点：29号楼3楼会议室
欢迎广大师生踊跃参加!
机械与汽车工程学院
2018年12月3日
报告人简介：
艺苑教授目前任职于美国俄亥俄州立大学工业工程专业教授, 主要研究方向包括超精密金刚石切削、微器件和微纳加工及玻璃透镜的精密热压成型。在超精密金刚石切削加工方面，主要研究课题是慢刀和快刀系统在光学器件加工方面的应用。在微器件和微纳加工工艺研究当中，由他主导的科研团队结合金刚石超精加工工艺和光刻技术，成功在硅片和玻璃基底上加工出具有独特功能的三维光学器件，如三维微透镜及复眼结构。这项技术非常适合微米到毫米尺度加工。二零零六年，他因在玻璃精密模压上的贡献获美国自然科学基金会的CAREER奖。此外，艺苑教授发表80多篇期刊论文，一项美国专利，并经常在精密光学制造和微机械的国际会议上展示他的研究成果。
艺苑教授长期在美国精密工程学会（ASPE）担任组织工作，同时也曾经兼任美国精密工程学会期刊（Precision Engineering）和（ASME Journal of Manufacturing Science and Engineering）的编委。现任（Advanced Optical Technologies）副主编。近年来经常担任两岸三地精密工程年会的国际专家组成员，评审会议稿件及主持小组会议。在国际合作方面，他现在是中国科技大学的客座教授，曾长期在德国的夫琅和费在亚琛和耶拿的研究所工作，主要研究玻璃模压和微光学器件的超精密加工。
报告摘要：
Ultraprecision machining, particularly processes at micro and meso scale play an important role in optical, medical and biomedical device fabrication. Successful implementation of these devices depends on two somewhat conflicting factors – quality and cost. To this end, first ultraprecision machining is required to guarantee high precision in mold fabrication. To reduce production cost, high volume processes such as injection molding, hot embossing, and cleanroom and noncleanroom lithography are widely used.
Historically, ultraprecision machining such as diamond turning, micro grinding were developed to create extremely high tolerance components and geometries. It was later on evolved into a production ready process for high precision mold fabrication. To facilitate the replication processes, material properties and different forming processes have been the focus of recent investigations using both experimental and numerical modeling approaches.
In this presentation, ultraprecision machining process – conventional diamond turning process, freeform diamond machining based on slow tool and fast tool servo processes, and lithography process were used for direction fabrication of microdevices as well as masters for high volume replication process. For high volume production processes such as compression molding of glass optics, hot embossing and injection molding of polymer optics and other devices were introduced and device performance was demonstrated.
