| 摘要 |
<p>A tapering method for use in, for example, wire-cut electric discharge machining, in which any desired truncated cone-shaped machined surface is inserted between first and second tapered surfaces (TP1, TP2) adjacent to each other such as to be smoothly continuous therewith. The passage (A1 - Q1, Q1R1, R1 - C1) of a lower guide (DG) and the passage (A2 - Q2, Q2R2, R2 - C2) of an upper guide are calculated from passage data of the first and second tapered surfaces (TP1), TP2) as well as the radius (S) of a work lower-surface corner portion and the radius (r) of a work upper-surface corner portion which are respectively set as desired. Then, machining is effected such that the first tapered surface (TP1), the corner tapered surface, and the second tapered surface (TP2) form a continuous smooth surface.</p> |
