Institute of Surface/Interface Science and Technology

Academic Leader

Prof. Fu Yonghong

Dr. Yong-hong Fu (b.1965) is a Professor and Ph.D. supervisor in the School of Mechanical Engineering (SME) of Jiangsu University. He is the director of Research and Evaluation Centre of Education and Teaching of Jiangsu University. He is advanced member of Chinese Mechanical Engineering Society. In 2009, he went to USA National Laser Engineering Centre at the University of Virginia to make cooperation research as a visiting professor. His research fields include advanced technology of die designing and manufacturing, tribology, laser surface texturing technology and equipment, advanced mechanic seal technology, engineering nonlinear calculation and simulation. So far, He has finished about 30 scientific research programs (such as Natural Science Foundation of China, Jiangsu Provincial Technology Support Program, Jiangsu Provincial Key Technologies Research Programmed). Two of which have been awarded scientific and technical achievements prizes of provincial level. He has published more than 60 academic papers. He also has held and applied 12 national patents.

Email: fyh@ujs.edu.cn

Address: 301 Xuefu Road, Zhenjiang, Jiangsu 212013, PR China

Professor Xi-jun Hua

Dr. Xi-jun Hua (b.1966) is a Director of the Research Institute of Surface/Interface Science and Technology in the School of Mechanical Engineering (SME) of Jiangsu University. From 2001 to 2005, he went to the University of Miyazaki (Japan) to make cooperation research and gained PhD degree. He is an advanced member of Chinese Mechanical Engineering Society, and committee member of Chinese Reducer Standardization Committee. His research fields include tribology, laser surface texturing, solid lubrication, surface/interface science and technology, robot vision and control. So far, he has finished about 20 scientific research programs (such as Natural Science Foundation of China, Jiangsu Provincial Technology Support Program and National Postdoctoral Foundation, etc). Three of which have been awarded scientific and technical achievements prizes of provincial level. He has published more than 30 academic papers. He also holds 5 national patents and has applied 2 state invention patents. He has published 4 co-authored books.

Email:xjhua@ujs.edu.cn

Address: 301 Xuefu Road, Zhenjiang, Jiangsu 212013, PR China

Research fields

1. 1. Tribology theory and micro-texture Optimization designing of laser surface texturing(LST)
2. 2. Special LST equipment and its application in the key friction units of engine
3. 3. Green remanufacturing of engine and other key component
4. 4. Solid lubrication based on LST
5. 5. Study on new type of zero-leakage and non-contact mechanical seal
6. 6. Study on the technology of the new laser textured die
7. 7. Precision micro-forming technology for the micro component
8. 8. Precision forming of the metal bipolar plates of micro fuel cell and cell performance optimization investigation
9. 9. New technology of energy conservation and environmental protection in power machinery
10. 10. Robot vision and control

Staff

Yong-hong Fu, Xi-jun Hua, Bi-feng Yin Vice Director, Yun Wang Vice Director, Pei-de Bao, Wei-guang Wu, Pei-yun Zhang, Jian-rong Sun, Xiu-xiang Chen, Zhi-xiang Yang

Academic Committee Member

Qin-sheng Bi， Li Quan， Lei-gang Wang，Hui-long Chen,Run Yuan

Research Achievements

The Institute has finished about 30 scientific research programs (such as National 863 Program, Natural Science Foundation of China, Jiangsu Provincial Technology Support Program, Jiangsu Provincial Key Technologies Research Programmed). Six of which have been awarded scientific and technical achievements prizes of provincial level. More than 100 academic papers have been published. More than 40 papers have been cited by the three distinguished indexes such as SCI, EI. 20 national patents have been held and applied. More than 10 books have been compiled and published.

I. Tribology theory and micro-texture optimization designing of LST：

A lubrication model was developed for the piston ring and cylinder Liner with regular microstructure in the form of parabolic profile dimples. The influence of surface micro-geometry shape parameters on lubrication performance was obtained by solving the dimensionless Reynolds equation with modified multi-grid method. The results show that micro-holes through LST can efficiently produce hydrodynamic pressure.

Fig.1 Hydrodynamic pressure distribution of micro-holes

Fig.2 Change of oil film and friction in whole motion cycle of engine

II. Research on special LST equipment

The “single-pulse interval of the same point many times” method is adopted, which is a new method for laser micro-texturing. It combines motion control with Q-switch control to keep single laser pulse output during the processing time. The method can significantly reduce the negative thermal effects during laser processing.

Fig.3. LST machine with work piece rotation Fig.4. LST machine with laser head rotation

III. LST application in the key friction units of engine:

Laser surface texturing (LST) is an effective approach for improving the terminological properties of friction pairs. Experimental results indicate that it is practicable to apply single pulse interval laser honing technology to cylinder bore surface of diesel engine, based on Q switched diode-pumped solid-state (DPSS) No: YAG laser. Experiment on performances of engine bench scale test has been carried out. It is found that the characteristics of power, torque and fuel consumption keep stable, the oil consumption was reduced by 50% and the emission of combustion engines was reduced about 40%, comparing with traditional plateau honing technology.

Fig.5 .Laser micro-machining of cylinder Liner Fig.6. LST of cam shafts

Fig.7. LST cylinder Liner Fig.8. LST of piston rings

Fig.9.LST of mechanic seal Fig.10.Various LST components

Fig.11. Micro-holes with LST Fig.12. Micro-grooves with LST

Fig.13. 3-D profile of laser micro structuring

Fig.14. Processing simulation of LST die

Fig.15. Laser microstructure die

Fig.16. LST diesel engine bench scale test

Fig.17. LST gasoline engine bench scale test

Cooperation and Interchange

Academician of Chinese Academy of Sciences: Shi-zhu Wen and Yangtse Rive Scholar: Jian-bin Luo visiting and guiding our Institute.

Research Equipment

WYKO NT1100 Optical Profiling System