Theory and mechanical analysis of Tube Hydroforming of hollow component

Tube hydroforming is efficient plastic technology in manufacturing hollow components and is attracting more attention in the past decades. In this paper, the mechanical theory of hydroforming was studied. The external load character and internal stress character of tube hydroforming were discussed. Then, according to the characters, the function and classification of internal pressure were presented in general. Base on the stress analysis, its effect on the yield criterion and calculation formula were also researched and derived. It demonstrates that processing parameter plays an important role in tube hydroforming and formula discussed and derived by this paper is feasible in practice.