METHOD AND DEVICE FOR FORMING TURBINE BLADE BLANK

PURPOSE:To improve forming efficiency and to reduce a cost by providing a rotating manipulator by supporting both ends of a blank on a press, arranging the deformation constraining part of the blank and processing a mirror-image turbine blade blank at single stage. CONSTITUTION:A forging machine 70 forming turbine blade blanks 20, 30, right and left deformation constraining devices 73, 74 by coming into contact with pressurizing cylinders 71, 72 and upper/lower deformation constraining devices 75, 76 are arranged. The blade blanks 20, 30 are clamped and the manipulators 60, 61 having the rotary shaft in the blade longitudinal direction are provided as well. The round bar base blank 10 in the weight equiv. to the blade blank weight is prepd. to form a primary blank 11 by upper and lower flat dies 4, 5. After forming a secondary blank 12, then, the blade blanks 20, 30 are formed simultaneously with mirror-image blades with constraining the blank deformation by changing in order the upper and lower dies 4, 5 having wing sectional shapes. The forming efficiency is thus improved and the cost is reduced.