Method for detecting and compensating electrode wear of electric dischage machining

• Main Authors: CHEN, CHIN-HUI, CHEN, MING-JI, LIN, JUI-KUAN, MAI, CHAOUANG
• Format: Patent
• Language: Chinese; English
• Published: 01.08.2008
• Subjects: MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL; TRANSPORTING; WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OFELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKESTHE PLACE OF A TOOL

A method for detecting and compensating electrode wear of electric discharge machining (EDM) is disclosed, which comprises the steps of: defining a calibration node; calculating a wear length of a tool electrode by an edge-finding algorithm; using the calculated wear length of the tool electrode as a cut compensation for compensating a processing depth of another tool electrode replacing the previously mentioned tool electrode; whereas the processing depth is obtained according to the following formula: the processing depth = designed depth of cut + current wear of the tool electrode replacing the previously mentioned tool electrode - calculated wear length of the previously mentioned tool electrode + an offset. With the aforesaid method, the wear of an used tool electrode can be detected automatically for compensating the processing depth of an unused tool electrode without ant additional equipment while achieving accurate machining.