The invention discloses a
pipe hot medium
internal pressure forming method based on
molten glass, and relates to a
metal pipe forming method. The problems that according to existing hot medium internal
high pressure forming methods, the heating speed is low,
heat conducting coefficients are low, sealing is difficult, and
forming pressure only can reach about 0-50MPa are solved. The method comprises the steps that 1, a
pipe internal
high pressure forming temperature interval is determined according to the pipe variety; 2, according to the pipe internal
high pressure forming temperature, glass materials are selected; 3, a pipe to be formed is preheated; 4, a pipe blank is vertically placed into a forming die, and die closing and sealing are carried out; 5, the glass materials are heated to obtain
molten glass; 6, the glass media are injected into the sealed pipe blank; 7, the pipe blank is heated to internal high pressure forming temperature under high-temperature filling; and 8, material supplementing is carried out; and 9, pressure maintaining is carried out, the
molten glass flows out through an overflow valve, die opening is carried out, and the formed deformed-section pipe partis obtained. The pipe hot medium
internal pressure forming method is used in the field of internal high pressure forming.