hydroforming die The process consists of pre-bending a metallic tube and placing this pre-shaped tube inside a die with the desired cross sections and forms, and applying pressure to the inside of the tube held by the die. During the blowing or forming of the tube held in the die, holes can be pierced into the tube thereby avoiding secondary operations in most cases. Hydroforming allows complex shapes with concavities to be formed, which would be difficult or impossible with standard stamping.
