On January 8, the National Science and Technology Awards Conference was grandly held in Beijing. Jia Zhenyuan, a professor at Dalian University of Technology, won the first prize of National Technology Invention Award.
Awards: high-performance high-performance carbon fiber composite materials and efficient processing technology and equipment.
High-end equipment in the fields of aviation, aerospace and transportation is the embodiment of the national manufacturing level and overall strength, and the carbon fiber reinforced resin-based composite material has an extraordinary strategic significance for weight loss and efficiency of high-end equipment. However, this material is typical Difficult to process materials, burrs, tearing, delamination and other processing damage can easily occur during the processing, which is hard to meet the high performance requirements of the carbon fiber composite material components, restricting the popularization and application of such high-performance materials and limiting the improvement of equipment performance.
After more than 10 years of research, Jia Zhenyuan team developed 13 sets of high-performance carbon fiber composite materials CNC machining equipment, as China's aerospace multiple key components of the key components of processing the only equipment, to achieve from the unworkable or manual processing to low damage Digital processing of the results have been in a space hospital, aerospace Hospitals, Aviation Industry, China Commercial Aircraft and other business applications, breaking a new space equipment compartment, a aircraft barrel section, a series of helicopter rotor, a heavy aircraft control panel , Large aircraft fuselage barrel section test pieces, high-speed rail body test pieces and other key components of high-quality and efficient processing problems, breaking the blockade.
'I am a working person' - when Jia Zhenyuan meets and handshakes, he "self-reports to the family."
Jia Zhenyuan, 54, is the first person who completed the first prize of 2017 National Technology Invention Award, a professor and vice president of Dalian University of Technology, a distinguished professor of Changjiang Scholars, a chief scientist of the National 973 Project, a candidate of the National Mega Plan and the first prize of the National Technology Invention Award in 2017.
He was not high enough and his hair was gray. He told reporters: 'Farmers should kindly plant more food and the workers should do a good job and work out good products. If we engage in engineering science, we must understand the problem and work through it , Strive to solve practical problems and meet the major national needs. '
Jia Zhenyuan (middle) and its members engaged in research and development. Propaganda Department of Dalian University of Technology
Jia Zhen-yuan dry this live is a worldwide problem - carbon fiber reinforced resin-based composite (hereinafter referred to as 'carbon fiber composite') components of high quality and efficient processing. From 2003 onwards, he led the team relay research for more than 10 years, not only in Carbon fiber composite material cutting principle research made major breakthroughs, and developed a series of new low-damage, high-efficiency processing tools, processes and equipment, the processing damage from the original centimeter level down to 0.1 millimeters, reached the international advanced level, for the carbon fiber Composites have paved the way for large-scale applications in aerospace, aerospace and transportation.
'Do restrict the development of the industry neck card problem'
Jia has been practicing in mechanical engineering for nearly 30 years since he graduated from his Ph.D. program and has always wanted to be able to make sense of what he is doing. "He said, 'What makes sense is that Can combine their own research with the needs of the country, and be a key issue for colleges and universities that have advantages and can not be solved by enterprises and restrict the development of the industry. "
Carbon fiber composite material of high quality and efficient processing, is such a 'kink neck' problem.
The high-end equipment in the fields of aviation, aerospace and transportation is a concentrated reflection of the manufacturing level of a country. "The lighter and heavier the high-end equipment to run, the faster they run, the longer they fly and the greater the payload." According to Jia Zhenyuan, the weight of aviation, spacecraft and high-speed rail equipment is generally calculated as 'g' .The results show that the fuel consumption can be reduced by 3% -4% for every 1% reduction in the weight of the aircraft structure; Reduce by 6% -7%.
There are two ways to reduce the weight: First, clever design, and second, the material is light. At present, both lightweight and stiffness, strength of the material, when it comes to carbon fiber material: stronger than steel, the proportion lighter than aluminum, conductive performance better than copper. Therefore, the resin-based composite material prepared from carbon fiber reinforced phase not only has the advantages of light weight, high strength, and easy manufacture of materials and structures in a synchronous manner, saving time and labor, but has become the weight-loss and efficiency of high-end equipment in the fields of aviation, aerospace and transportation Of the preferred material.
'Generation of materials from generation to generation, but the light is not good material, processing technology must keep up.' Jia Zhen Yuan said that only after the first trimming, making holes and other series of mechanical processing, composite materials components to connect the assembly, high-end equipment The headache for the enterprise is that it is easy to produce burrs, tearing, delamination and other damage during the processing of composite components, which will affect the bearing performance, fatigue life and reliability of the components, which is a major potential safety hazard. Technology backward, carbon fiber composite materials used in developed countries for many years, it is difficult to come in handy in our country.
In 2003, when the scientific research team discovered this issue of "karmic neck" when cooperating with enterprises, the scientific research team was determined to overcome this difficulty.
Solve the problem from the root
'This is a very difficult thing.' Jia Zhen Yuan told reporters that carbon fiber composite material is formed by the fiber and resin shaped, solidified into a new material, multi-layer stacking, multiphase mixing, anisotropic, trimming, hole making The failure behavior, the removal mechanism and the homogeneous material such as metal are completely different, which is a typical hard-to-process material.It is a secret that high-quality and high-efficiency carbon fiber composites Will not tell you.
'We must solve the problem at the root.' After careful consideration, Jia Zhenyuan identified the R & D path for the team: from the application of basic research, from the mechanism to clarify the cause of damage caused by carbon fiber composite materials, and then extracted from the engineering practice to solve The common method of theoretical problems.
With the support of the key projects of '973 Program' and '863', the National Natural Science Foundation of China and the national '04 special project ', the research and development team re-established the scientific research platform and developed new experimental equipment. From material analysis, mechanical calculation and mechanical processing Experiments and other aspects of cross-cutting research.With the spirit of 'ants chew the bones', Jia Zhenyuan team finally made a number of major breakthroughs: proven carbon fiber composite material removal mechanism and processing damage formation mechanism proposed cutting theory for carbon fiber composite material processing , Established a dynamic simulation model of cutting force and cutting process.
On the basis of this, the research and development team guided the practice with theory and put forward the principle of suppressing damage caused by the micro-element removal and reverse-shear processing. It invented three major types and nine series of tools for making holes and mills , To achieve a low damage composite processing.
With "micro-yuan removal" and "reverse shear" function of the series of composite materials processing tools. Propaganda Department of Dalian University of Technology to provide
Light tool is not enough, large-scale components can not be inseparable from the processing of sophisticated technology and equipment research and development team continued tackling the development of a negative pressure reverse cooling and self-cooled chip discharge function of a series of processing technology developed 13 sets of CNC machining As of now, these equipments are still the only ones for the processing of the key components of many key aerospace composite materials in China.
Since 2010, Jia Zheyuan team developed a new tool and technical equipment put into use, the carbon fiber composite material processing damage control within 0.1 mm, to achieve from the unmanageable, manual processing to low damage digital processing of cross-high-performance carbon fiber Composite components finally show their talents in the high-end equipment in the fields of aviation, aerospace and transportation.
'Most like others call me Jia teacher'
This is the fourth time that Jia Zhenyuan won the National Technology Invention Award, the first time in 2005, he won the second prize of the National Technology Invention Award as the fifth person, the second was in 2008, He won the first prize of National Technological Invention Award for the third time in 2014. He won the second prize of National Technological Invention Award as the first complete person in 2014. The four grand prizes are the basis for processing the key parts and components for major national needs Theory and tools and equipment problems, but the object is completely different, there are differences between the contacts.
During this period, he was also promoted to the position of Minister of Mechanical Engineering and Materials Energy from the Dean of the School of Mechanical Engineering. Since 2015, he has been the vice president of Dalian Polytechnic.
'In fact, I like most people call me' Jia teacher. '"He confessed,' I give myself the definition of a teacher, teaching is the duty of scientific research is the duty, I as a dean, minister for many years, now vice president, Administrative and scientific research can not be said without conflict, the key is how you allocate time and improve efficiency.
Jia Zhen Yuan is how to do it?
My colleague's answer is 'No, no.' Team leader Professor Gao said: 'Teacher Jia will not play mahjong, neither will play poker, and three will not sing and will have almost no hobbies.'
Jia Zhenyuan own trick is 'three for a while': early in the morning for a while, less rest for a little less at noon, after get off work a little longer.
'In fact, Jia teacher engaged in scientific research more than' three for a while. '' Professor Wang Fook Ji team members said Jia Zhenyuan almost no holidays, all the books on the desk, as soon as possible to see the material to study the problem. 'One Sunday I went The office building handled some personal business. After passing Mr. Jia 's office, he saw him head down and carefully scrutinized the knives in his hand.
Jia Zhenyuan is self-disciplined and humorous in front of the team members.He is in charge of the modern manufacturing technology research team, which is an innovation team identified by the Ministry of Science and Technology and the Ministry of Education. Currently, there are more than 30 teachers and over 200 postgraduates.
In the eyes of outsiders, intellectuals have more problems and temper - how to take such a big team with you?
Jia teacher is very humorous, when we encounter frustration frown, he enlivened the atmosphere with a joke .In Gaoyin eyes, Jia teacher very generous, well-known favorable things to others.
'It is not hard to bring a team.' Jia Zhenyuan said with a smile, 'The characteristics of intellectuals, is to be respected, to achieve their own value. My job is how to combine the value of their own members and team values, so that everyone has something Do, can do things, the team has developed, individuals can grow.
After 10 years of development, Jia Zhenyuan led the modern manufacturing technology research team can be described as talented people, Canglongwohu: 1 people selected million people planning innovative talents, 2 selected Cheung Kong Scholar Distinguished Professor, 1 was awarded the National Youth Fund, a selected youth Yangtze River Scholar and one person was awarded the National Outstanding Youth Fund.Gaohang professor proudly said: Our team is a veritable 'northeast wolf'.
'They like to know both theory, and understand the practice, can come up with real guys, to solve the real problem team, particularly popular in the enterprise.' And Jia Zhenyuan team for many years Institute of Aerospace Materials and Technology researcher Li Lanzhu so commented.