Patent ID: 7154063

Claim:
A method for operating a small hole electric discharge machining equipment automatic electrode changing device for machining an object on a machining table, which comprises the steps of: a) moving a machining rotary spindle located on a machine platform on a back of the machining table to a first spindle position utilizing a servo motor driving a screw, the machining rotary spindle having a quick release collet located on a bottom thereof, the quick release collet having a used electrode chuck of a plurality of electrodes chucks connected thereto; b) moving an electrode docking turntable rotatably connected to the axle seat from a second position to a first position connecting the used electrode chuck to the electrode docking turntable; c) moving the machining rotary spindle upwardly to a second spindle position and separating the used electrode chuck from the quick release collet; d) rotating the electrode docking turntable to a next rotated position of a plurality of rotated positions; e) aligning a new electrode chuck of the plurality of electrodes chucks with the quick release collet; f) moving the machining rotary spindle downwardly to the first spindle position connecting the new electrode chuck to the electrode docking turntable utilizing the quick release collet, g) moving the electrode docking turntable from the first position to the second position separating the new electrode chuck from the electrode docking turntable, wherein the rotating step d) utilizes a rotating cylinder fastened to a top of the axle seat and having: i) a rotating cylinder push rod; ii) a slide rail; iii) a connecting rod connected to the rotating cylinder push rod and being slidably located on the slide rail; and iv) a push block, the connecting rod being inserted through the push block and having a movement limited by the slide rail; and v) a push rod hinged to a front of the push block, the push rod being controlled by the movements of the rotating cylinder and selectively engaging one of a plurality of radiating ribs of the electrode docking turntable and rotating the electrode docking turntable to one of the plurality of rotated positions.