Superplastic volumetric forming also belongs to isothermal forming. The mold and the formed part are at a similar temperature. Vacuum isothermal casting: under vacuum conditions, the casting mold and forging alloy are heated simultaneously. When the liquid metal reaches a certain overheating degree, it performs filling. The starting forging temperature of copper alloys is generally between 1000-1100 degrees Celsius, which common die-casting molds can hardly withstand. The service life of copper alloy die-casting molds is very short. Die-casting technology can produce components with the most complex structures. Products made by die-casting technology often have shrinkage porosity defects. In order to compensate for the inability of simple molds to produce complex whole machines, a process of casting first and then forging was developed, requiring two sets of molds, namely the casting mold and the forging mold. Copper alloys are mostly processed using superplastic forming technology. Combining continuous casting and continuous forging technology with superplastic forming technology.