He escorts the Shenzhou spacecraft, satellites and other major national equipment. His "weapon" is only half the thickness of an A4 paper. Today, let's take a look at the skilled craftsman Zhang Zhizhong. He uses a 0.05 mm milling cutter to carve the "Eye of Space". Zhang Zhizhong, a senior technician at the Industrial Foundation Research Institute of China Electronics Technology Group Corporation, is a milling worker. His "weapon" is a milling cutter with a diameter of only 0.05 mm, which is only half the thickness of an A4 paper. The operation of this "mini weapon" must be absolutely stable. The slightest shake may damage the blade. When the blade is clamped, the human eye cannot even detect it. When the milling cutter is working, the surrounding machine tools must be turned off. The slightest vibration may cause processing errors. Zhang Zhizhong makes the milling cutter dance lightly on the metal surface like a dancer. Every cut is 0.05 mm. .001mm After more than a few hundred cuts, the error of each cut must be controlled within 0.005mm. The carved channel with a diameter of 0.06mm is the tunnel for the satellite to transmit microwaves in space. The difference between millimeters determines whether the "eye of space" can see farther. At present, only Zhang Zhizhong's studio can produce such high-frequency waveguide parts in China and meet the batch production standards. He dares to challenge the impossible. The shell thickness of the "space core" is reduced to 1.5mm. Zhang Zhizhong's skillful hands can not only polish the "eyes" of the satellite, but also tailor-make "protective shells" for key parts of spacecraft. The precise positioning of spacecraft in space and the space station rely on internal radar transmitters. These precision core components are carefully protected by a layer of shell to resist the harsh high temperature and high pressure test in space. Since the first generation of Shenzhou spacecraft Zhang Zhizhong's team took on the mission of protecting the "space core" as soon as the ship was launched. In the field of aerospace, "every gram of parts reduced is a contribution", but for Zhang Zhizhong's team, 1 gram means challenging the impossible. Once Zhang Zhizhong's team received the task, they had already produced the parts according to the weight reduction limit. The shell thickness was already as thin as a record 5 mm, but they still needed to reduce the weight by half. The thinner the shell, the easier it is to deform. This is a recognized problem in the industry. It is even more difficult to overcome deformation when facing unfamiliar new materials. Zhang Zhizhong also felt that "there is really no way to reduce it anymore", but he did not give up. "I think we must dare to challenge and cannot retreat when encountering difficulties." After more than a year, Zhang Zhizhong led the team to reduce the shell thickness from 5 mm to 1.5 mm on the basis of ensuring structure and precision. His eyes are "Ruler" judgment by naked eyes is equal to professional measurement data. Over the years, Zhang Zhizhong has developed a "magic skill" that allows him to judge with naked eyes that micron-level errors are almost equivalent to professional measurement data. The confidence of this accurate eye comes from his countless days and nights of peace of mind and calmness in the past 21 years. He has created and researched hundreds of tooling fixtures and more than 50 innovative achievements. Over the years, he has strictly and repeatedly tempered himself. Every difficulty has trained him to be able to endure loneliness and repetition, and also trained him to have a unique skill of understanding the "temper" of materials. In Zhang Zhizhong's mind, skilled craftsmen must be enterprising and innovative, be at ease, calm, endure loneliness, and withstand repetition. "Don't give up because the matter is small, start with some small innovations... The original intention is to do every ordinary job well and be worthy of every product you hand over."
