Hotforging & Warm-Hot Forming
The main advantage of hot forging using a hydraulic press is that the stamped material enters inside the die at a lower rate and thus the die is filled in a more complete and accurated manner; in this way the follow-on machining works are minimised. Furthermore presses, when compared to the power hammers, can complete the whole job in one cycle (when having a constant force indipendent from the RAM position), thus allowing an increasing production rate.
SPF (Super Plastic Forming) or Gas Forming are other processes or techniques to form superplastic materials. Usually the following method are related to the superplastic alloys and concern metalsheets: Blow and Vacuum Forming. Both cases are substiantially the same process (somretimes also called stretch forming) where a gas pressure differential is applied to the SPF material, thus forcing the same to assume the shape of the die. In the Vacuum Forming the applied pressure is limited to the atmospheric pressure (thus the depressure is larger as a function of the induced vacuum). The forming possibilities are thus limited. In the Blow Forming a supplementary pressure is applied by the use of an external tank ( pressures range from few up to a few hundred bars).
Gigant Italia is able to design and manufacture Hydraulic Presses for gas-forming processes and/or integrate power units on existing or new presses, thanks to the R&D engineering work carried-out in the last few years