| 摘要 |
PURPOSE:To make it possible to easily cut a wound bush forming plate having inclined end faces, by using cutting dies comprising a lower cutting blade of a square cross-sectioned shape, an inclined block beginning from a position horizontally retracted from the share point of the lower cutting blade and an upper cutting blade of a square cross-sectioned shape. CONSTITUTION:A plate member 1 is cut by using cutting dies comprising a lower cutting blade 14 of a square cross-sectioned shape, an inclined block 15 having an inclined surface beginning from a position horizontally retracted from the share point of the lower cutting blade 14 and an upper cutting blade 13 of a square cross-sectioned shape. At first, when the plate member 1 is fed to the cutting dies, a gap 20 is formed between the inclined surface 16 and the plate member 11. Meanwhile, the shearing and plastic deformation of the plate member 1 is initiated when the upper cutting blade 13 is lowered, and the cutting is completed when the upper cutting blade 13 is fully lowered. The cut plate member 1 is made into a wound bush blank having inclined surfaces 7b', 8b' at the axial end faces thereof. |
