METHOD FOR AUTOMATICALLY CONTROL THROUGH-HOLE ON WORK BY WIRE ELECTRICAL DISCHARGE MACHINING

• Main Author: USUI YASUO
• Format: Patent
• Language: English
• Published: 14.10.2003
• Edition: 7
• Subjects: MACHINE TOOLS; MEASURING; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; PHYSICS; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL; TESTING; 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

PROBLEM TO BE SOLVED: To eliminate manufacturing of defective parts by easily controlling a dimension of a through-hole on a work formed by wire electrical discharge machining to a final target dimension or an allowable final dimension. SOLUTION: When predetermined machining times, machining quantity or an interim target dimension is attained, electrical discharge machining automatically stops and an actual dimension measuring means operates Step 1 to linearly transfer a fixing stand or a wire electrode from the X-axis direction to the Y-axis direction to measure an actual measurement value of a through-hole dimension based on a distance for the wire electrode to touch a through-hole inner wall surface; Step 2 to find deviation between the actual measurement value and the final target dimension or the allowable final dimension to detect necessity for re-machining based on the deviation; Step 3 return the work by re-machining to the step 1 if re-machining is necessary. COPYRIGHT: (C)2004,JPO