| 摘要 |
[Problem] To make it possible to remove an excess metal portion from a casting with a press. Especially, to make it possible to punch an excess metal portion of a work into a recess shape. To make it possible to finish a casting at low cost. [Means for Resolution] A set of dies are composed in order to remove excess metal from a casting with a press. A method of removing the excess metal from the casting comprises the steps of: attaching a cutter 25 to one of the stationary die 11 side or the movable die 12 side; setting a work W on the other side; and punching excess metal of the work W into a recess shape by one punching motion of the movable die 12 with a cutting means composed of a plurality of blades from the first blade, which is smaller, to the final blade, which is larger and protruded, when the excess metal of the work W is removed by a punching motion of the movable die 12 conducted on the stationary die 12 . A cutter 25 comprises: a row of blades in which a plurality of blades are arranged step-wise having a change in the form from the first blade, which is smaller than the final shape of the excess metal to be punched, to the final blade, the shape of which is the same as the final shape, wherein the row of blades from the first blade to the final blade are arranged so that the first small blade can be used being ahead of other blades and the other blades can be used in the order of punching motions.
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