| 摘要 |
PURPOSE:To prevent any change of a dimension in a work due to room temperature so as to enable its machining to be high accurately performed, by interruptedly supplying cooling machining fluid to an electric discharge clearance during the time from machining interruption to machining restarting and performing preliminary cooling of the work in its machining interrupted condition. CONSTITUTION:A controller, which controls the driving of a machining fluid supplier 40 and a machining fluid filter 50, is equipped, and machining gluid 42 is interruptedly supplied to a clearance 38 between a work 16 and a wire electrode 18 during the time from a machining interruption to machining restarting, so that preliminary cooling of the work 16 in its machining interrupted condition is performed. This interrupted time of a driving instruction is set to an interval such that a temperature of work 16 is little changed by cooling action of the machining fluid 42. Accordingly, a dimension of the work 16 at restarting of its machining is equalized to that of the work before a stop of its machining, and high accurate machining can be performed. |
