HOT-FORMING DIE, PRESS-FORMING DEVICE, AND HOT PRESS-FORMING METHOD

摘要

A hot-forming die for a press-forming device press-forms a heated metal plate (body to be formed) (4) and cools the body by jetting a refrigerant to the body. The hot-forming die has a main feeding passage (10a) for allowing the refrigerant to pass therethrough, branched feeding passages (10b) branched from the main feeding passage and having jetting openings (10c) for jetting the refrigerant to the outside of the die, and nozzle members (11) fixed to the jetting opening side of the branched feeding passages and limiting the passage amount of the refrigerant by using passage holes (11a) for allowing the refrigerant to pass therethrough. In a hot press-forming method, the refrigerant in the die is held on standby after being pressurized to a degree at which the refrigerant is not jetted, further pressurized at a predetermined timing during or after press working, and then jetted to the body.