Verfahren zur Herstellung einer Nut mittels Funkenerosionsbearbeitung

• Main Authors: OOTA, KAZUHIKO, KODAIRA CITY, TOKYO, JP, KIGAWA, TADASHI, HIGASHIYAMATO CITY, TOKYO, JP, YOSHIDA, HIROSHI, KODAIRA CITY, TOKYO, JP
• Format: Patent
• Language: German
• Published: 12.02.1998
• Edition: 6
• 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

The invention is concerned with forming a groove (12) with a desired shape in a mold (11) inexpensively, easily and with high accuracy by means of discharge machining. There is provided a method of forming a groove by means of discharge machining, characterized by carrying out discharge machining a plurality of times to form deep openings (18), by inserting a stick-like electrode (17) into a material (11),- while shifting location of the machining so as to connect adjacent deep openings (18) with each other, and forming the groove (12) having a desired shape by means of said connected deep openings. Since it is possible to form the groove (12) with a desired shape by means of a stick-like electrode (17) with a simple shape, productivity is improved and also manufacturing cost is decreased. Further, even if the stick-like electrode (17) wears out, it is sufficient to exchange the inexpensive stick-like electrode (17). Furthermore, groove width (W) can be changed by adjusting pitch (P) between adjacent deep openings (18).