Turbine blade making method - involves shaping blade by extrusion into blind cavity in one-piece die

摘要

The aircraft engine turbine blade manufacturing method comprises heating a blade blank, shaping it in a closed die in a superplastic state, machining the blank, then twisting and heat treating it. The shaping is by extrusion into a blind cavity in a one-piece die. The heating may be during or after twisting. The blade twisting device consists of a movable top part (43) and a stationary bottom part (41) with elastic inserts in their surfaces gripping the blank (35). The blank (35) is pulled lengthwise by a fixture (34) pulled by a drive (33) and twisted as it is pulled by a pin on a rotatable disc (39) engaging in a slot (37) in a guide (36).