Ning Yunzhan is measuring and grinding the machine (Source: provided by the interviewee)
Xinwang October 24 (intern reporter Wang Xinrui) Ning Yunzhan is a senior vehicle fitter technician and chief skill expert of CRRC Group Qingdao Sifang Locomotive Vehicle Co., Ltd. After working at CRRC Group for 31 years, he taught himself the technology of electric welding, lathe operation, and went from the initial "repair" step by step to designing and upgrading parts by himself. In 2006, he summarized and developed the "pure hand-made grinding operation method for wind-moving grinding wheels" which allowed the bogie positioning arm of China's high-speed railway to complete the road abroad for several years in just a few months. In 2022, Ning Yunzhan was named a moral model in the province. Now he has a new life dream - to become an mechanical designer and build aerial orbit.
At the beginning of his career: "Choose because of love"
Ning Yunzhan's path to senior technician begins with the inheritance of his father. A box and several tools that belong to the carpenter are Ning Yunzhan’s memories of “craftsmen”. Since childhood, watching pieces of wood turn from his father's hands into cabinets, chairs, and tables, he has developed a strong interest in making it by himself.
Under such influence, after graduating from junior high school, Ning Yunzhan was admitted to the mechanical fitter major of Nanjing Railway Technical School. After graduating in 1991, he was assigned to the Sifang Locomotive Factory of CRRC Group, responsible for repairing parts of rolling stocks. When he first arrived at work, Ning Yun Exhibition encountered parts that could not be repaired and had to be replaced. At this time, he would ask his colleagues to help him use the machine tool to make a new one. But after a while, the young Ning Yunzhan felt embarrassed to always bother others.
In order to make the work more handy and to learn more technology, Ning Yunzhan suggested to the class monitor at that time that he wanted to learn about welders and machine tools. With the continuous learning and progress, he developed a stronger interest in mechanical parts maintenance and design. .
In 2006, CRRC Group Qingdao Sifang Locomotive Vehicles Co., Ltd. received the task of producing high-speed EMUs, and the "positioning arm" on the steering structure has become the top priority in production research. Because the EMU can reach a speed of 200 kilometers per hour during driving, the contact area of the positioning arm must withstand 20-30 tons of impact force, and the size of the contact area of the positioning arm almost determines the driving safety of the high-speed EMU .
positioning arm grinding technology was still in a blank stage in China at that time, and the company invited foreign experts to teach experience. When Ning Yunzhan was called to the workshop to learn grinding technology, he did not expect that he was facing a machine worth more than 100,000 yuan. "The expert showed it to us, and I repeated the operation as if it were. As a result, after measuring it, my grinding area was almost exactly the same as that of Japanese experts." Such rich experience and solid technology shocked everyone present, and foreign experts even gave Ning Yunzhan a thumbs up.
Because the grinding technology of the positioning arm has begun to show its clarity, the company decided to start mass production of high-speed EMUs, and Ning Yunzhan's grinding team also faces greater workload. After a period of practical operation, Ning Yunzhan found that the grinding technology introduced from abroad could not meet the requirements of production speed, and he was thinking about updating and improving the grinding technology. Through repeated experiments and grinding, he summarized a set of "pure manual grinding operation methods for wind-moving grinding wheels", which increased the contact area of the positioning arm, so that even when facing the pressure of 20-30 tons that needs to be borne, it will become much safer. Faced with such breakthroughs, domestic and foreign experts gave full affirmation, and CRRC Group's Nanjing and Tianjin branches also came to learn from each other.
is leaning: "The significance and charm of mechanical inventions"
Ning Yunzhan's balcony less than ten square meters of his home is his "secret garden", and many inventions and creations also "walking" from here. A machine tool, an milling machine, , and various tools hanging on the wall make the small balcony look even more cramped. However, Ning Yunzhan can stay here until midnight every day after get off work. For mechanical innovation, he devoted most of his time.
At the first Great Power Craftsman Exchange Conference in 2015, the EMU traction lever body composition compression device developed by Ning Yunzhan was unveiled for the first time. This device not only solved the problem of the grading positioning of the traction lever body and positioning nodes before pressing, and the problem that the nodes limited to the original tooling function can only be pressed with single heads, but also solved the problem that the nodes are easy to rotate in the traction lever hole during the pressing process.
An old friend of the past said after seeing Ning Yunzhan: "Lao Ning, that pressing device is really good, saving time and effort, and is still in use now." Ning Yunzhan felt very accomplished when he heard such words. For him, this is the significance and charm of mechanical research.
31 years of work experience and 18 national personal patents. Such achievements are beyond the reach of many people, but for Ning Yunzhan, it is just the beginning.
50-year-old new dream: "Building an air intelligent three-dimensional transportation network"
Ning Yunzhan, born in 1972, is 50 years old this year. Many people have begun to plan their retirement life at this age, but for him, he has a dream that has not been fulfilled. In 2020, Ning Yunzhan went to Beijing to study at the Labor Relations Academy. At that time, he was walking on the sidewalk on the road outside the school, looking at the traffic on the road and looking up at the vast sky. He thought that the city's traffic is so crowded now, why can't it develop into three-dimensionally underground, ground, and air? Driven by such an idea, he began to draw pictures over and over again, constituting ideas again and again.
In Ningyunzhan’s intelligent three-dimensional transportation network, subways and high-speed rails can realize unmanned driving, and the ground control center automatically controls 24-hour operation. At the same time, the three-dimensional transportation network can connect factories, buildings, residential buildings, schools, and even form urban transportation network groups, ultimately realizing low-cost, intelligent, point-to-point travel methods.
, and this idea was also written into "Suggestions on Building a Low-Carbon and Environmentally Friendly Smart City-Building an Air Intelligent Three-dimensional Transportation Network", and now he is also working on project cooperation with Shandong Light Industry Engineering School . "Although I am 50 years old, I am unwilling to accept my dreams not fulfilled."
Now Ning Yunzhan is not only daily work and research, but also teaches in technical schools. For him, mechanical manufacturing is his hobby, so he can persist for decades and devote all his energy to it. He brought inventions and creations into the classroom, hoping to inspire students' love for mechanical creation and encourage more young people to enter the manufacturing industry, because young people are the hope of the future. This is also another interpretation of "inheritance".
