| 摘要 |
<p>A method of controlling the machining in a wire cut electric discharge machining apparatus for machining workpiece in a prescribed shape, which makes it possible to reduce the machining error in corners caused by deflection of the wire electrode by the steps of: applying a voltage between the wire electrode and the work, cutting the work with the discharge energy, and moving the work relative to the wire electrode in accordance with machining instruction data. An override amount (K) is obtained by an override amount calculator (103b) using corner radius data (r) and a corner angle data (υ) applied as machining instruction data from paper tape (101), and a relative speed (F) is calculated by a relative speed calculator (103f) using the override amount (K) and the instructed feed speed (F0). Motors (MX, MY) are respectively rotated via pulse distributors (105X, 105Y) and servo circuits (SVX, SVY) in accordance with the relative speed (F) lower than the instructed feeding speed (F0), the work is moved relative to the wire electrode, and the corner is electrical discharge machined.</p> |
