| 摘要 |
<p>The punch cutter (1) has a blade whose cutting edge (2) has a rounded area with radius (3) of 0.005 to 0.040 mm. The rounded edge is additionally hardened with a refined surface finish. The cutting angle (4) for the cutting edges is 30 to 60 deg. The cutting edge of the punch cutter may have straight edges. these taper toward a tip which can be rounded by laser melting.</p> |
