Abstract: A small-hole electrical discharge machining device comprises a diaphragm which can be moved up and down along a notch window provided in a work tank for mounting a work in the work tank in which a working fluid can be filled or discharged, and adjusts the height of the working fluid; a W-axis slide which can be moved up and down, and having an electrode guide in the lower end portion; a master cylinder which is moved up and down corresponding to up-and-down movement of the W-axis slide; and a slave cylinder which is connected with the master cylinder through a pipeline and with a diaphragm driving mechanism, and wherein the diaphragm is moved up and down corresponding to up and down movement of the W-axis slide.

Abstract: A small hole electrical discharge machining apparatus includes an electrode holder that holds an upper part of an electrode, an electrode guider that guides a lower part of the electrode, a jet nozzle that injects water jet to the electrode holder, and a fluid channel that supplies a gas, such as air, to an electrode guide of the electrode guider. The electrode is guided with the water jet toward the workpiece, such that small hole electrical discharge machining is performed while the gas is being released from the electrode guide into a working liquid via the fluid channel.

Abstract: A small hole electrical discharge machining apparatus 1 is comprised of electrode holding 27 means for holding an upper part of an electrode 39, electrode guide means 41 for guiding a lower part of the electrode 39, a jet nozzle 73 injecting a water let (WJ) from the electrode holding means 27, and a fluid channel 97 which supplies a gas, such as air, to an electrode guide 75 of the electrode guide means. The electrode 39 is guided with the water jet (WJ) toward the workpiece (W), and small hole electrical discharge machining is performed while the gas is being released from the electrode guide 75 into a working liquid via the fluid channel 97.

Abstract: A small-hole electrical discharge machining device comprises a diaphragm which can be moved up and down along a notch window provided in a work tank for mounting a work in the work tank in which a working fluid can be filled or discharged, and adjusts the height of the working fluid; a W-axis slide which can be moved up and down, and having an electrode guide in the lower end portion; a master cylinder which is moved up and down corresponding to up-and-down movement of the W-axis slide; and a slave cylinder which is connected with the master cylinder through a pipeline and with a diaphragm driving mechanism, and wherein the diaphragm is moved up and down corresponding to up and down movement of the W-axis slide.

Abstract: A small hole electric discharge machine drill is provided with a depth-specific processor and a tiltable unit operable in fluid. The turntable unit includes a first axis with a first center of rotation and a second tilting axis with a second center of rotation. The turntable unit is provided inside a work tank that may be filled with fluid. The small hole electric discharge machine drill includes an electrode for small hole processing.

Abstract: A small hole electrical discharge machining apparatus, including: a slide base; a Z axis slide freely positionable in a vertical direction, the Z axis slide being provided on the slide base; an electrode holding member for holding an upper portion of a stick-shaped or pipe-shaped electrode, the electrode holding member being provided on the Z axis slide so as to be freely rotatable; an electrode guiding member for guiding a lower portion of the electrode, the electrode guiding member being provided on the slide base; and an electrode motor for rotatively driving the electrode holding member, the electrode motor being provided on the Z axis slide. Moreover, the electrode holding member is provided with a jet nozzle for guiding the electrode by use of a water jet.

Abstract: Disclosed is a method of depth-specific processing with a small hole electric discharge machine drill. Firstly, a specified processing depth A and tolerance &agr; are registered with a program. Secondary, an origin of initiation of drilling is set on a surface of a workpiece by contacting a tip of an electrode D with the surface of the workpiece at a check point. Thirdly, the electrode is moved to a processing position to process until the specified processing depth. Fourthly, the electrode is moved to a position above the check point. Fifthly, the electrode is moved downward until the electrode contacts the surface of the workpiece, a Z-axis coordinate upon contact is defined as C. And finaly, a condition judgment is made concerning C which is found in the fifth step, as to whether or not |C|≦&agr; is satisfied. If the condition is satisfied, then processing is completed.