| 摘要 |
<p>For shear-cutting a stack (10) of thin sheets (11) of amorphous steel along a cutting plane (42) that extends transversely of the stack (10), we utilize apparatus that comprises two blades (12, 14) that are positioned at the start of a cutting operation on opposite sides of the stack (10). Each of the blades (12, 14) has a first surface (30, 36) for engaging one side of the stack (10) and a second surface (32, 38) extending transversely of the first surface (30, 36) and generally parallel to said cutting plane (42) and intersecting the first surface (30, 36) at a corner (34, 40). The first surface (30, 36) of each blade (12, 14) is disposed at a predetermined rake angle ( alpha ) with respect to a reference plane (50) extending through a point on the corner (34, 40) of the blade (12,1 4)and normal to said cutting plane (42). By making the sum of these rake angles of a negative value and between 5 and 35 degrees, we are able to substantially improve the wear resistance of the blades (12, 14) and lengthen their working life.</p> |
