ULTRAFINE HOLE PUNCHING METHOD AND PUNCHING MACHINE

摘要

An ultrafine hole punching machine (10) comprising a metallic holder member (13) secured with a ceramic fiber punch of 50 μm thick or less while projecting one end thereof slightly from one end face in the longitudinal direction, a member (21) for supporting the holder member slidably, a die 23 having a straight die hole (23f) located in the axial direction of the punch while spaced apart from the forward end thereof, a member for securing the slidable supporting member and the die, and a driving section (31) for moving the holder member along the slidable supporting member. When a voltage is applied while keeping a discharge distance between the surface of the die and the forward end of the punch provided with a metallic film on the surface, discharge takes place and a die hole is made.