Numerical simulation, experiment, and optimization of a multidirectional die forging process for oil cutoff valves

An oil cutoff valve is mostly used in the petrochemical industry, playing a role in emergency cutoff. In accor-dance with the shape characteristics of forgings, a multidirectional die forging process for oil cutoff valves was designed in this study. Deform software was used to simulate the forging process; and the distribution laws of the deformation process, temperature, strain, stress, dynamic recrystallization, forging load, and damage were systematically analyzed. Temperature, speed, and friction coefficient were optimized by regarding the punch force and forging damage values as evaluation indexes. Results show that the optimum process parameters are used in forging production and the developed forging exhibits good forming quality. The forming test proves that the forging is completely formed without evident defects under the optimized process parameters. Moreover, its mechanical properties meet product requirements, providing theoretical guidance for a multidirectional die forging process for valve bodies.