Viscous pressure forming (VPF) is a new developed sheet soft-punch forming process in 1900s. The basic principle and characteristics of VPF are described. The applications of VPF technologies of nickel-based super-alloy corrugated thin-walled part, asymmetrical thin-wall part with variable diameter, super-alloy thin-walled part with variable diameters, corrugated thin-walled part with larger diameter and small section are presented. The results show that VPF is suitable for the forming of parts with high strength, low plasticity, super thin-wall and complex shaped.

There are a variety of sheet metal parts in rocket body structure. The exact length calculation of sheet metal structure work is the key to ensure better quality of product. This paper describes two methods of sheet metal part unfolding which are method of formula and method of software. Two quick unfolding ways using AUTOCAD and EXCEL are described aim at method of formula. Summarize the notes of using Pro/E to unfold aim at method of software. span>Parts Unfolding