| 摘要 |
<p>A manufacturing process of a lightened blade (1) for turbomachines, comprising the steps of manufacturing a semifinished product (100) provided with an oblong plate-like portion (101) whose shape substantially approximates the shape of the main airfoil-shaped body (5) of the shaped airfoil (3) of the lightened blade (1) to be built; obtaining, substantially at the centre of one of the two faces of said plate-like portion (101), at least one hollow seat (101a) of predetermined shape; positioning in abutment on the surface of the face of the plate-like portion (101) where the hollow seat (101a) is, a covering plate (103), the dimensions of which exceed those of the hollow seat (101a), so as to cover the surface of the face of the plate-like portion (101) where the hollow seat (101a) is, up to the larger lateral edges of the same plate-like portion (101); fixing in a rigid and unmovable way the covering plate (103) on the face of the plate-like portion (101) by means of an adhesive layer or lap welding (7) that affects the perimeter strip or flap of the covering plate (103) that rests directly on the surface of the face of the plate-like portion (101), outside the hollow seat (101a); and finally, stripping/removing, by means of mechanical machining with material removal, the excess material from the resulting work piece, so as to obtain the shaped airfoil (3) of the lightened blade (1).</p> |
