CCTV News (News Network): Intelligent manufacturing engineering and technical personnel are new professions that were included in the National Occupational Classification Ceremony in 2020. On May 1, "The Great Power Craftsman", let's meet a rocket-making craftsman who deeply integrates new generation information technology, artificial intelligence, high-end equipment manufacturing with the aerospace industry to accelerate the iteration and upgrading of aerospace CNC processing technology. He is Liu Zheng of China Aerospace Science and Technology Corporation.

The Long March 2F carrier rocket, which is the only active manned carrier rocket in my country. Its safety assessment value reaches the limit index of 0.99996, and it has become the safest manned rocket in the world with a launch success rate of 100%.

Liu Zheng is a craftsman at the China Academy of Launch Vehicle Technology. His job is to design and develop new technologies and new equipment to solve the pain points and difficulties in the processing of aerospace parts. In 2005, Liu Zheng, who held the diploma of the Department of Mechanical Engineering at Tsinghua University, resolutely entered the first-line workshop of aerospace manufacturing.

At that time, China's aerospace was only single-digit launches per year, and many rocket manufacturing required manual methods. The rocket's cabin is one of the most important components of the rocket. The traditional processing method requires manual measurement of the wall thickness and then manual compensation and processing until the standards are met. Can the machine be automatically completed? Liu Zheng began a bold attempt, with more than a dozen different clamping solutions and hundreds of experiments. Countless failures finally came to success. Liu Zheng developed a processing plan for automatic measurement and compensation, directly installing the measuring head on the machine tool to guide the machine tool to automatically compensate, and there is no need for manual operation throughout the process.

The success of automatic measurement and compensation technology has enabled my country to achieve 100% qualified wall thickness of large-scale shell sections of launch vehicles for the first time.

Now, Liu Zheng, who loves to work and innovation, is developing a new generation of processing equipment. This mobile processing robot is like a mobile machine tool, which will completely change the processing problems of large aerospace components.

Under the leadership of Liu Zheng, the team achieved China's first 100% five-axis CNC machining of a symmetrical spacecraft, overcome the problem of processing the inner wall of the nozzle of a large-thrust hydrogen-oxygen engine, etc., undertakes 37 major projects such as state ministries and commissions, and obtained 12 national patents.