Abstract: The forked three-way stamping parts are commonly components used in the air collector pipe of the air conditioning unit. They mainly function is shunt, combined flow and filtration in the pipeline system. Filtering net is added in the internal three-way, fixed through positioning concave rings where the impurities can be filtered. The traditional stamping mould structure has its limitations, the failure of the pipeline parts is analyzed through experimental data, there is a phenomenon of stress concentration due to the irregular surface shape. To design the mould as an elliptical rotating shell body, changing its structure can effectively reduce the stress concentration. Starting from the processing technology of stamping parts, analyze the failure form of the fork tee parts, optimize the original structure of the tee stamping parts, increase the stamping distance value, and increase the wall thickness to improve the strength of the stress point. Through the above optimization and verification with the finite element simulation and experiment, it can be concluded that the modified stamping parts have a longer life and can withstand greater stress.

Key words: Stamping parts, Three-way, Structure optimization, Finite element analysis