Electrical discharge machining apparatus for forming minute hole

Details Electrical discharge machining apparatus for forming minute hole Electrical discharge machining apparatus for forming minute hole

1984-05-18

1988-09-13

Pellinen, A. D.

Electric heating

Metal heating

Cutting or disintegrating

219 69E, 219 69V, 219 69G, B23H 100, B23H 726

Patent

active

047711574

ABSTRACT:
An electrical discharge machining apparatus for forming minute holes in a workpiece has a machining electrode supported in V-shaped grooves for forming a minute hole through an electrical discharge between the machining electrode and the workpiece. The machining electrode is movable toward and away from the workpiece. The workpiece is movable between a position below the machining electrode and a position below a microscope disposed in conjugate relation to the machining electrode. After a position to be machined has been set by the positioning means, the workpiece is moved to the position below the machining electrode for electrical discharge machining. The machining electrode is subjected to little displacement while it is being rotated, and the position to be machined can be determined with high accuracy. The electrical discharge machining apparatus can quickly form a neat minute hole of small out-of-roundness and reduced surface roughness in the workpiece at a correct position thereon.

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