| 摘要 |
A first low-current discharge circuit applies low-current power to the machining gap between wire WIR and workpiece WK to trigger a discharge. A second high-current discharge circuit applies high-current power to the machining gap to produce a main discharge for machining the workpiece WK.
<??>The first low-current discharge circuit comprises low-current source V1, a small discharge capacitor C1 and a transistor Q1 for controlling discharge of capacitor C1 across the machining gap.
<??>The second high-current discharge circuit comprises a high-current source Vh, a large discharge capacitor Ch, and a transistor Qh for controlling discharge of capacitor Ch across the machining gap.
<??>The first and second discharge circuits are arranged so that the first low-current discharge circuit supplies power with the wire WIR positive relative to the workpiece WK and the second high-current discharge circuit supplies power with the wire WIR negative relative to the workpiece WK.
<??>This reduces undesirable electrolytic action on the workpiece and facilitates increased cutting speed. |
