公开(公告)号：US20190337070A1

公开(公告)日：2019-11-07

申请号：US16340691

申请日：2016-11-15

申请人： Mitsubishi Electric Corporation

发明人： Takayuki NAKAGAWA ,  Makoto NII ,  Satoru IZAWA

IPC分类号： B23H7/08 ,  B23H7/10 ,  B23H11/00

摘要： A wire electric discharge machine for machining a workpiece by causing a discharge between a wire electrode delivered from a wire bobbin and the workpiece. The wire electric discharge machine includes: a remaining length calculation unit that calculates a remaining length of the wire electrode based on electrode winding coefficients, bobbin draw-out radius correlation information, and a spool diameter of the wire bobbin. The electrode winding coefficients depend on a winding density of the wire electrode, an inner width of the wire bobbin, a wire diameter of the electrode wire, and a winding tension of the wire electrode. The bobbin draw-out radius correlation information is correlated with a bobbin draw-out radius that is a distance between a position at which the wire electrode wound around the wire bobbin is separated from the wire bobbin and a central axis of rotation of the wire bobbin.