Joint Laboratory for Precision Metrology and Equipment Development, Partner State Key Laboratory of Ultra-precision Machining Technology, The Hong Kong Polytechnic University and State Key Laboratory of Mechanical Manufacturing Systems Engineering, Xi’an Jiaotong University

Abstract:

Nowadays, structured and freeform surfaces are widely used in various high-value-added-products such as precision moulds, CCD camera lenses, 3D virtual reality headset, etc. Although significant progress has been made in the development of various precision metrology and measuring instruments for structured and freeform surfaces, most of them focus on traditional off-line measurement processes. With the growing demand for improving the accuracy and efficiency of the precision manufacturing of structured and freeform surfaces, on-machine metrology is indispensable to maintain the position of the workpiece for further compensation of the machining errors of the workpiece. Although multi-sensor data fusion is emerging in the field of image processing, robotics, and sensor network, there is still a lack of methodology to govern the measurement process to realize automatic and intelligent measurement of complex surfaces with traceability on multi-sensor instruments, which hinders the future development and application of these surfaces.

This presentation aims to present the development of on-machine metrology systems for in-situ measurement of structured and freeform surfaces. Two case studies of the development of on-machine metrology systems for precision manufacture of structured and freeform surfaces are also discussed. To achieve intelligent surface metrology, a Gaussian process based data modelling and data fusion (GP-DMF) method is also presented. The proposed GP-DMF) method is technically feasibility to be used to enhance the measurement ability for multisensor CMMs.

Speaker profile

Professor Benny Cheung is an Acting Head of the Partner State Key Laboratory of Ultraprecision Machining Technology in Department of Industrial and Systems Engineering at The Hong Kong Polytechnic University. Currently, he holds various honorary positions in other universities and professional bodies including Adjunct Professorship of Changchun University of Science and Technology, Board Membership of the Asian Society for Precision Engineering and Nanotechnology (ASPEN), etc. His research interests in precision engineering include ultra-precision machining, precision metrology, advanced optics manufacturing, etc. Prof. Cheung has authored and co-authored two Research Monographs, two Edited Books, and more 140 Science Citation Indexed (SCI) refereed journal papers. Moreover, he has received many research prizes and awards such as the 2008 ASAIHL-Scopus Young Scientist Awards–First Runner Up Prize in the category of “Engineering and Technology”, Gold Medals in the 36^thand 44^thInternational Exhibition Inventions New Techniques & Products in Geneva in 2008 and 2016, Joseph Whitworth Prize 2010 by the Manufacturing Industrial Division of The Institution of Mechanical Engineers(IMechE), UK in 2011, the 2nd Innovation Technology Award (3rd Class) from Chinese Society for Optical Engineering (CSOE) in 2016, etc.