FIELD: technological metal working units possibly used for creating predetermined profile of part cavity, removing fins and rounding sharp edges in joining zones of openings in hard-to-access places of part cavity.
SUBSTANCE: apparatus allows simplify orientation of working portion of tool-electrode relative to axis of part cavity profile and realize final working of small-size openings. Apparatus includes housing 1 with opening 2 for placing part 3 and tool-electrode 9. Guiding rods 4 are mounted on housing. In said guiding rods plate 8 is mounted with its motion limiters 5,6. Said plate supports tool-electrode 9 for placing it in opening 10 of housing 1 and it provides orientation of tool-electrode relative to profile of part cavity. Non-working portion of tool-electrode 9 is covered with electric insulation 12 of elastic material being in contact with plate 8.
EFFECT: improved accuracy of final working of small-size openings.
4 dwg
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