FIELD: process engineering.
SUBSTANCE: invention relates to making gas turbine hollow blades by lost-wax process. Unburnt core made from ceramic paste by moulding in mould is arranged at holder 300 and secured thereat, long mull cutter 100 with helical cutting edge being fitted at said holder. Said cutter is revolved and brought in contact with surface region to be deburred. Said region is cooled to keep at temperature below that of binder transition in amorphous state, said binder being included in ceramic paste composition.
EFFECT: ruled out core straining, better deburring.
7 cl, 5 dwg
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