PURPOSE: To make it possible to mark free characters and patterns on a surface or a rear face of a work.
CONSTITUTION: By using a punch press working a work in cooperation with an upper die 7 and a lower die 3, a blade tip 67 for marking, which is provided on the upper die 7 or the lower die 3, is pressed against the surface or the rear face of the work. Simultaneously making the blade tip 67 vibrate, by moving the work in an X axis direction and a Y axis direction, arbitrary diagrams, characters, etc., are graved on the work. To perform this operation, a fluid pressure cylinder 35 lowering a punch body 61 on which the blade tip 67 for marking is provided at its tip, is provided, and a vibrator 81 vibrating the punch body 61 and the blade tip 67 is provided in the inside of the punch body 61. Otherwise, an exciter vibrating a punch body and the blade tip 67 is provided separately. Otherwise, a blade tip is provided on the lower die, and when marking by vibrating the upper die, the rear surface of the work can be marked.
TANIAI NORIYUKI
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