BLOW MOLDING METHOD FOR SUPERPLASTIC MATERIALS AND SYSTEM

摘要

A blow molding method for superplastic materials, which uses a time-related gas pressure, based on a maximum strain velocity, as a time-related target gas pressure pattern when a metal plate having superplastic characteristics is heated to a preset temperature and then is blow-molded at high speed, and which comprises a data input step for inputting the molding shape data of the metal plate and the characteristic data of the metal plate material for storing in a storage device, a step of determining a time-related target gas pressure pattern from the input molding shape data and the material characteristics data, a step of dividing the determined target gas pressure pattern into an appropriate number of segments in terms of time, a step of determining a gas pressure control parameter for each divided target gas pressure pattern segment, and a step of controlling a gas pressure pattern according to the determined gas pressure control parameters.