| 摘要 |
PCT No. PCT/EP82/00221 Sec. 371 Date Jun. 1, 1983 Sec. 102(e) Date Jun. 1, 1983 PCT Filed Oct. 4, 1982 PCT Pub. No. WO83/01216 PCT Pub. Date Apr. 14, 1983.A rotating electrode tool made of polycrystalline synthetic diamonds in a metal foundation is used in the electro-erosive machining and mechanical grinding of a metal bonded, electrically non-conductive hard material such as synthetic diamonds or boron nitrides in an electrically conductive metal matrix. The tool is first used to electro-erosively machine the workpiece. When a signal is obtained from the machining current or voltage indicating that no further electroerosive removal is possible, the tool automatically mechanically grinds the workpiece to remove nonconductive particles not removed by spark erosion.
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