Deformation study of piercing on tubular parts

The deformation on the piercing process of tube was studied.The local elastic deformation and plastic deformation,the non-local deformation or collapse of the tube were analyzed by finite element method.These deformations′ influences on the quality of finished tube were further discussed in detail.The deformations of tube with different characteristic geometry parameter in the piercing process,and the suppressing results of the non-local deformation and the local plastic deformation through the use of different holding and pressing scheme of tube were studied.The research results will provide useful information for stipulating and optimizing the piercing process of tube and designing the stamping die structure.