Research on Design and Simulation of End Upsetting Process of Oil Drill Pipe
摘要
In this study, we present a new three-stage forming and two-stage heating forming process to improve the forming quality of tubing end upsetting. The forming process of the new process is studied by numerical simulation, and the best forming process parameters are obtained. The experimental device is designed, and the experimental results verify the accuracy of the simulation results. Through this process, the quality of the transition zone can be guaranteed while the concave defects of the inner wall can be eliminated, which has certain guiding significance for the actual production.