| 摘要 |
This invention aims at a bending process in the width direction on a blade member ( 1 ) without leaving any unprocessed portion. According to the present invention, the thickness-deviating process of making the front end edges ( 41, 51 ) of dies ( 4, 5 ) into a portion near the blade point ( 12 ) and flowing material of the blade member ( 1 ) is carried out. The thickness-deviating process is carried out at plural positions in the length direction on both sides of the blade member ( 1 ). By making the linear shapes of the front end edges ( 41, 51 ) meet each other in the width direction of the blade member ( 1 ), the thickness-deviating process is carried out.
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