In front of us are a batch of parts to be processed, which will be used for the main landing gear of the helicopter. Qin Shijun, standing in front of the CNC milling machine, skillfully selects the cutter, sets the parameters, puts in the blank and presses the start key. With the roar of the machine, parts are "carved" out. Although Qin Shijun is not tall and young, his ability is not small. At the age of 39, he is a senior technician of Harbin aircraft industry group and chief skill expert of aviation industry. C919 large domestic aircraft, the war hawk escorted by the Gulf of Aden, and even the "Shenzhou VII" have his own processed parts. "It's not modest to say that the qualified rate of processed parts has reached 100%. But I haven't reported waste products for so many years." Facing the reporter, Qin Shijun said foolishly. Who would have thought that Qin Shijun's Kung Fu began with "stealing learning". "Making planes" was Qin Shijun's childhood dream. His father is a model worker of Hafei. When he was in primary school, a huge picture of his father with red flowers on his chest was displayed in the street. He proudly introduced to his classmates: "that's my father, who makes airplanes! I'll be like my father in the future!" After graduating from the technical school in 2001, Qin Shijun looked forward to coming to Hafei. But the ideal is plump and the reality is skinny. I studied as a die fitter, but I was assigned to the post of NC milling worker to do some "chores" of moving, cleaning and cleaning every day. Qin Shijun felt "boring" and wanted to learn from his teacher. But compared with the junior college students in the workshop, the foundation is thin, and the teacher and Fu don't look up to it. "No one teaches, just learn by yourself!" Holding his breath in his heart, Qin Shijun took aim at the grinding boring cutter: craftsmanship and high technology, few people in the workshop can. "I've learned it. Everyone must look at me with new eyes!" Qin Shijun observed the old master's knife sharpening action, "it's not difficult to look at it.". He followed the gourd and painted the gourd and worked hard for most of the day. After comparison, he looked like it! Excitedly, he showed it to the teacher. Without thinking about it, the knife was directly thrown aside: "is that the knife you sharpened? Can you work?" In the face of merciless criticism, the young man looked like an eggplant beaten with frost and wilted for several days. At this time, his father's words woke him up: "you can't be fat in one bite, and you can practice it in one day. It's not called skill." After the next day's shift, Qin Shijun dived into the grinding wheel room. Dust filled the sky, choking tears; Staring at the rapidly rotating grinding wheel for several hours, as soon as I looked up, the world was spinning More than half a month later, from the surprised eyes of the teacher Fu when he looked at the knife again, Qin Shijun knew that he had "become". "Boy, I've observed you for some time. You're very resilient. Do you want to learn from me?" One day, a master surnamed song in the workshop took the initiative to find Qin Shijun. He finally became an apprentice. The opportunity is hard won. Qin Shijun cherishes it very much, "you can't drop the chain to the master". Once off work, young people of the same age are thinking about where to play, but Qin Shijun is thinking about "how to make the fixture more compact". More than a dozen professional books were chewed, and the learning notes were piled up half a meter high. NC machine tool processing is often used to drawing and programming technology. He simply applied for the computer major of Northeast Agricultural University and went to study systematically. "As a post-80s industrial worker, Qin Shijun not only understands technology, but also is good at innovation." Duan Xiujun, who has worked with him for 13 years, said. When machining the web on the outer barrel of the main landing gear of a certain model, the NC workshop encountered a big problem. The digital simulation of parts is too complex to be processed completely by programming, manual operation, repeated milling and measurement. One piece takes at least half an hour. It takes time, and the quality is extremely unstable. "The cost of parts is nearly 10000 yuan. This is basically the last process. Once there is a problem, all previous efforts will be wasted!" Qin Shijun began to figure out how to crack it. Suffering from the lack of improvement, he came across an article on "reverse thinking" on the Internet, which inspired him. "Can the machining allowance of parts be determined by reverse sampling points, and the collected points can be programmed and directly formed in one knife?" A bold idea was brewing in his mind. At midnight, the noisy factory was quiet, and only one light was on in the workshop. Qin Shijun, who was a little fat, squatted on the narrow machine tool and stared at the tool processing path. Beads of sweat with big beans rolled down from his forehead from time to time. When I think of my body, my numb legs don't listen to me. Fighting all night, he almost fell off the machine tool A week later, the "reverse thinking reverse spot processing web method" was finally successful. The production efficiency has been increased by more than 8 times, and the one-time qualified rate of parts has reached 100%! After that, Qin Shijun galloped on the road of innovation. He has accumulated more than 400 sets of self-made tooling and fixtures, and achieved 715 technological innovations and small changes. In 2015, he was elected a national model worker; In 2020, it won the "China Youth May 4th Medal". "Look, this is the machine tool I used at that time." Following Qin Shijun, the reporter went to an old white and green machine tool. Compared with the fully enclosed automatic lathe next to it, it seems very outdated. Touching the familiar hand wheel, Qin Shijun sighed: "technology is constantly updating, skilled talents should also constantly innovate, and we must not lie flat and slack!" (Xinhua News Agency)