Improvements on local deformation condition of shaped object in double action drawing;

Wedm for processing irregular parts and technique for treating straight section;

There were some construction characteristics in cantilever steel structure of CCTV New Station main building,such as large-span,heavy weight,bidirectional inclining steel columns,folded joints at high altitude,large number of special shaped components with multiple joints and large installation risk,etc.

To alleviates the problems such as fund insufficiency, the weak ability to use the advanced equipment and the poor purchasing power in small and medium-sized enterprise, it is very important to research and develop the special numerical control system to satisfy the welding of irregular workpieces.

Key Process Research on Hydroforming of Abnormity Tube;