PART THREADING METHOD Russian patent published in 2004 - IPC

FIELD: machine engineering, manufacture of parts operating at sign-variable loads in condition of abrasive wear.

SUBSTANCE: method for threading part with slot groove comprises steps of finishing and strengthening thread by means of tool moving along helical line and electrically heating part mounted with possibility of rotation. Before finishing and strengthening part thread and slot groove are formed. In order to realize finishing and strengthening operation slot groove is filled with electrically conducting insert. The last has on its outer surface thread whose geometry parameters are identical to parameters of main thread. Profile of thread of insert is matched with that of main thread.

EFFECT: enhanced quality of thread.

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