Abstract: According to the structural characteristics of the pipe joint parts, and combined with the application of dividing chucks on the numerical control lathe, the research and development of the non-eccentric pipe joint and pipe joint parts with eccentric structure can realize the efficient clamping, automatic transposition processing technology and the corresponding transposition fixture. The clamping device is characterized by rapid design and manufacture, strong universality, simple structure and convenient use. Through numerical control automatic transfer and efficient machining, the production and processing bottleneck problems caused by various types, large quantities and non-easy clamping positioning of die forging parts are completely solved, which reduces the labor intensity of operators and improves the processing quality of parts, thus laying a good foundation for the construction of enterprise flexible production line.