| 摘要 |
PCT No. PCT/JP86/00289 Sec. 371 Date Mar. 12, 1987 Sec. 102(e) Date Mar. 12, 1987 PCT Filed Jun. 11, 1986 PCT Pub. No. WO86/07294 PCT Pub. Date Dec. 18, 1986.A wire electrode type electrical discharge machining apparatus is provided with a taper-machining controller which is capable of conducting taper-machining with high accuracy, even in the case where the rigidity of the electrode varies due to the variation of the temperature thereof following the variation of the electric current flowing therein. The information representing the relations between a machining current and a taper-angle in the entire controllable range of a taper-angle to be controlled is prepared in advance and stored in a memory. A means for setting a machining current, a means for program-inputting a machining current, or a means for sensing a machining current is provided. The above information is read by a correction means, in response to the machining current which was set, program-input, or sensed by one of the above presented means, before it is input to the taper-machining controller, which corrects the taper-angle. In one embodiment, the taper machining controller computes the correct taper angle. With this corrected taper angle, tapper-machining can be conducted with high accuracy.
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