| 摘要 |
PURPOSE:To make a blade edge discharge-formable into a desired form without removing a blade from a grinding attachment by installing a pulse voltage feeder impressing discharge pressure, between an electrode with a negative form wall surface conformed to a blade edge form and the blade. CONSTITUTION:An electrode 6 with a negative form wall surface conformed to an edge form of a blade 3 is clamped to a chuck table 5 of a grinding attachment for a dicing device or the like. Next, the blade 3 attached to a spindle 4 of this grinding attachment is approached to this electrode 6. In this state, a pulse voltage is impressed on an interval between the blade 3 and the electrode 6 by a pulse voltage feeder (inclusive of a pulse generator 12) as supplying EDM fluid from a nozzle 14 to a space between the blade 3 and the wall surface of the electrode 6, and discharge takes place between them. With this discharge, an edge of the blade 3 is cut into a form accorded with the wall form of the electrode 6 without entailing any deflection and deformation. Thus, the edge of the blade 3 is discharge-formed into a desired form. |
