| 摘要 |
PROBLEM TO BE SOLVED: To provide a shear processing method and apparatus capable of processing stably without reducing productivity and enhancing the fatigue strength of a shear processing part without shortening the tool life.SOLUTION: A method for shearing a working object by a punch and a die is characterized in that one shearing step performs: shearing a workpiece by the punch and the die; and compression-working the recess at the portion which is spaced by a predetermined distance from the shearing edge which is obtained by said shearing work in the surface of said workpiece. |
