As the first person in the company to operate a CNC lathe, Li Jun quickly became familiar with the performance and principle of the machine tool and mastered the programming method. He made a variety of welding turning tools by using the clamping method of machine tool, which not only improved the flexibility of NC lathe processing, but also saved the cost, and reduced the price of each tool from several hundred yuan to more than ten yuan, and could be reused many times. His improved tools have achieved results that can not be achieved by conventional tools in the processing of many deep-hole and high-hardness materials such as power station valve core and hard-sealed ball valve seat. The qualified rate of finished parts has been increased by more than one time, the processing efficiency has been increased by three times, and the annual production cost has been saved by more than100000 yuan. In 200 1 year, the equipment he operated was replaced by a five-axis turning and milling center, which integrated turning, drilling and milling. He also took the initiative to process blood valves, temperature control valves and other key components, and made bold improvements to the technology, tooling and tools of many products. Over the years, he has constantly innovated his working methods and improved the processing efficiency, and completed more than 6,000 hours of working hours a year, twice the normal quota.