2results about How to "No elasticity" patented technology

The application belongs to the field of titanium alloy superplastic forming, and particularly relates to a kind of overall superplastic forming device of metal large-section differential annular parts, which comprises a forming die matched with a target-section differential annular pipe and a pressurizing device; a hydraulic system of the superplastic forming equipment applies a clamping force to the clamped forming die, and cooperates with an inner pressurizing gas guide pipe and an outer pressurizing gas guide pipe to pulse deliver high-pressure inert gas into and outside the pipe cavity of the original pipe blank, so as to realize the superplastic forming of the original pipe blank in a sealed environment and obtain the target-section differential annular pipe; meanwhile, the application also provides an overall superplastic forming method realized by the device. The method provided by the application repeatedly resets the friction force between the forming part and the die cavity interface, effectively avoids the local material flow stagnation caused by the accumulation of friction force, thereby improving the uniformity of the part wall thickness distribution, and the advantages of process simplification, high efficiency and energy saving; the formed part has no springback and welding residual stress, and has high dimensional accuracy.