Prof. Ken-ichi Manabe, Emeritus Professor, Guest Professor, Tokyo Metropolitan University, Japan
Ken-ichi Manabe was awarded his PhD in mechanical engineering in April 1985 from the Tokyo Metropolitan University (TMU), Japan. He had been a Professor at the TMU since 2002. After he retired from TMU in 2017, he received the title of Emeritus Professor from TMU. Prof. Manabe has undertaken extensive research on the theory and modelling of tube/sheet metal forming processes and intellectualization of their forming processes for over 40 years. Recently his research interest extends toward microforming technology and deformation mechanics in micro/meso scale. He was gained academic recognition in the Japan Society for Technology of Plasticity (JSTP), the Japan Society of Mechanical Engineers (JSME) and so on. He contributes to promote dissemination of tube forming technology and its theory and modeling. He received the Best Paper Award in 1989, 2009 and 2012 from the JSTP. He received the JSTP Medal in 2010 and attained the grade of Fellow in 2009 from the JSTP. He was the Vice President of the JSTP in 2011-2012, and the President of the JSTP in 2015-2016. He has published 19 book chapters, over 200 refereed journal papers and over 200 refereed conference papers.
Speech Title: High pressure hydroforming of metal microtube: possibility and challenges
Abstract: Tube forming technology has been applied and advanced to manufacture the lightweight components in automotive and other industries. Nowadays, this technology expands to micro-scale components manufacture in biomedical, electronics, and measurement instrument and communication fields. When scaling down into micro-scale, it becomes very difficult to apply the technology into micro-scale tube forming. In general, higher precise accuracy of tools is required. Also manufacturing the micro fine tools is very difficult due to very tiny dimensions. Furthermore, since microtube becomes geometrically thick material and its formability decreases due to size effect, it is difficult to form the micro-scale components. To solve these problems, application of high pressure technology is expected. In this presentation, as one of the forming processes, high pressure hydroforming of microtubes is focused on and its possibility and challenges are explained. For the purpose, a comparative research on the microforming characteristics of microtube between cross-shape and T-shape tube hydroforming processes is introduced and reviewed. Microtube hydroforming characterization of phosphorous-deoxidized copper and SUS304 tubes with diameter of 500 µm and thickness of 100 µm is introduced. Potential of micro tube hydroforming process is discussed as well.
Prof. Yeong-Maw Hwang, National Sun Yat Sen University, Taiwan
Dr. Yeong-Maw Hwang was born in Chanhwa, Taiwan, in 1958. He received his Bachelor's (1981) and Master's (1983) degrees in power mechanical engineering from National Tsing Hua University in Hsinchu, Taiwan. He earned his Doctor's degree (1990) in industrial mechanical engineering from Tokyo University in Japan. He has been a professor, Department of Mechanical and Electro-Mechanical Engineering (MEME), National Sun Yat-Sen University (NSYSU), Kaohsiung, Taiwan, since 1996. He has ever served as the department chair (2002-2005) of MEME. His research interests have been in the area of metal forming, machine design and mechanics. He won the Best Paper Award (1992) and Outstanding Engineering Professor Award (2007) from Chinese Society of Mechanical Engineers in Taiwan. He earned the Fellow title from Japan Society for Technology of Plasticity (JSTP), Japan (2012) and Distinguished Professor of NSYSU (2012). He has served again as the department chair of MEME in NSYSU since August 2017.
Speech Title: Die Design and Compound Tube Hydroforming
Abstract: Tube hydroforming (THF) processes have become popular in recent years, due to the increasing demands for lightweight parts in various fields, such as bicycle, automotive, aircraft and aerospace industries, etc. This technology is relatively new compared with rolling, forging or stamping, so that there is no much knowledge available for the product or process designers. Comparing to conventional manufacturing via stamping and welding, tube hydroforming offers several advantages, such as decrease in workpiece cost, tool cost and product weight, improvement of structural stability and increase of the strength and stiffness of the formed parts, etc. However, this technology is suffering some disadvantages, such as slow cycle time, expensive equipment and lack of effective database for tooling and process design. Profiled tubes or specially-shaped tubes, which have different shapes at different cross sections, are often used as automotive or bicycle supporting frames. Many profiled tubes can also be found in our daily life. Hydroforming processes are widely applied in manufacturing because of the increasing demand for lightweight parts in sectors such as the automobile, aerospace, and ship-building industries. Compound forming, which involves hydroforming and other forming processes such as crushing or preforming, is implemented to achieve a lower clamping force and forming pressure, as well as to ensure the uniformly distributed thickness of the formed products.
Prof. Zengtao Chen, ASME Fellow, University of Alberta, Canada
Dr. Zengtao Chen joined the Department of Mechanical Engineering at University of Alberta as a Professor in August 2014. He has been a faculty member with the Department of Mechanical Engineering of University of New Brunswick for ten years prior to the current position with UofA. His research areas include Mechanics of Materials, Materials Modelling, and Damage and Fracture Mechanics. His recent work includes multiscale modelling of deformation and damage evolution in aluminum and steel alloys, advanced thermal stress analysis of smart materials and structures, nanostructures, and composite structures. He is a Fellow of ASME.
Speech Title: Nanovoid development and dislocation motions in FCC metals
Nanoscale voids initiate in metals due to irradiation and other sorts of stimulations. Understanding the development of nanoscale defects in metals is vital to the reliability and security design of many industrial devices such as nuclear reactors, spacecraft and nano-electro-mechanical systems. Development of nanovoids such as growth and distortion interacts with local dislocation motion. In this talk, nanovoid development in a few typical FCC structures will be illustrated via molecular dynamic simulations. Some important issues related to the mechanism of dislocation motion, such as helical dislocation loop emission and growth around nanovoids, mass transportation through shear dislocations and nanovoid shape development under continuing plastic deformation will be addressed through MD results. Proper modelling conditions for MD simulation of nanodefects in metals are analyzed and discussed for viable modelling predictions of material failure.
Prof. Lang Lihui, Professor, School of Mechanical Engineering and Automation, Beihang University, Beijing, China
Dr.Prof. Lang Lihui, obtained his Ph.D degree from Harbin Institute of Technology in 1998. He is working now as full professor, Humboldt Scholarship excellent researcher, vice director of Youth Committee of Plasticity Engineering Association, editor of Stamping and Forging Technology. Mainly focuses on automotive and aircraft fields, his team research covers hydroforming including sheet hydroforming and tube hydroforming, Glare composite, High Temperature/Pressure Forming of powder, warm/hot hydroforming of lightweight materials, KBE system. He has published more than 200 paper in journals, most of which were cited by SCI and EI. One technical book named as Innovative Hydroforming and Warm/Hot Hydroforming was published. Supported by NICHIDAI Die Manufaturing Company Youth Prize. Awarded by the Mechanical Engineering Society of UK for the “Thomas Stephen Prize”. And six special invited and keynote papers in international conferences have been presented. Obtained more than 30 patents.
Speech Title: Rigid-flexible coupled hydroforming technology and automatic production line for aluminum alloy automobile body panels
The automobile lightweight technology has been paid more and more attention due to the limited resources and the increasing environmental pollutions. In this paper, according to the characteristics of difficult forming of the aluminum alloy material which is increasing used widely in automotive field, the rigid-flexible coupling forming process is put forward. It is a new derivative technique based on the sheet hydroforming process, having both advantages of the hydroforming and the rigid forming. The tools used in the process, after finishing the first installation, can achieve all the process actions of forming and shaping, guaranteeing the whole precision of the part. The local rigid mold can use the form of insert block, which can be replaced at any time, increasing the flexibility of the mold. Meanwhile, the automatic hydroforming production line built firstly in China is introduced. Specifically for the complex aluminum alloy inner panel of the engine hood in the paper, the relationship between the local round corner feature and the hydraulic pressure is theoretically analyzed. The key process parameters of the proposed process: hydraulic pressure loading path and rigid-flexible effect, blank holder force (BHF) and the draw bead setting, are investigated by using numerical simulation and experiment. Meanwhile, the formability of the aluminum alloy inner panel in different parameters of the rigid-flexible coupling process is also researched. Compared with the experimental results, the applicability of the new forming process is proved. The research can broaden the complexity and application range of the aluminum alloy automobile body panels formed by using the hydroforming technology to a certain extent.