Wire electric discharge machining apparatus

A wire electric discharge machining apparatus, comprising:

• a processing tank, which accommodates a workpiece;
• a lower-side wire guide assembly including a wire guide body, which positions and guides a wire electrode;
• a lower arm, which is provided so that a front end of the lower arm is positioned on an inner side of the processing tank, and the lower arm supports the lower-side wire guide assembly at the front end;
• a direction changing pulley, which is provided directly below the lower-side wire guide assembly;
• a winding roller, which is provided on an outer side of the processing tank;
• and
• a conveying device, which sends out the wire electrode to the winding roller;
• wherein the conveying device comprises:
• a high-pressure jet flow generator, which is provided on a side of the front end of the lower arm between the direction changing pulley and the winding roller in a plain view, and spouts a high-pressure jet flow toward a direction of the winding roller so that the wire electrode is guided only by a restraining force of the high-pressure jet flow without going through a guide pipe guiding the wire electrode and sent flying to the direction of the winding roller with the high-pressure jet flow;
• and
• a suction pipe, which is provided on an exit side of the winding roller, and sucks and captures a tip of the wire electrode sent by the high-pressure jet flow,
• wherein the direction changing pulley, the high-pressure jet flow generator, the winding roller, and the suction pipe are arranged on a conveying route of the wire electrode in order from a side of the lower arm.