| 摘要 |
PURPOSE:To make it possible to form an outside shroud for a static vane of a complicate shape by subjecting a plate-like material to roll working to form the same in a predetermined sectional shape and thereafter molding the same in an annual shape by a bending jig. CONSTITUTION:Upon forming, a plate-like material of a predetermined width is first passed through respective upper and lower rolls 13a, 13b and 14a, 14b of a first and second rolling devices. Thus, the plate-like material is subjected to rolling work to form intermediate products 11 and 12. Next, the intermediate product 12 is moved along the inclined surface 16 of a wedge-shaped bending Jig 15 installed at a position in the vicinities of the upper and lower rolls 14a and 14b, whereby the intermediate product 12 is subjected to a bending work at a predetermined curvature radius R and formed into an annular shape. Upon this occasion, the bending Jig 15 is caused to slide to adjust its position, whereby the curvature radius R applied to the intermediate product 12 can be adjusted. Accordingly, an outside shroud for a static vane forming a complicated shape can be formed rapidly, easily and cheaply. |
